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Parallel Functions Handbook

1. Further restrictions for the closing of GCB Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no inhibition to starting is activated and if mains is out of tolerance NOTE the load management see 8 6 can activate the inhibition to starting for the generators that need to be stopped because not needed to support the load stand alone supply e In TEST and in REMOTE START always ignoring inhibitions to starting DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence W024 early warning is equivalent to a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e An inhibition to power load has been activated 40 Parallel functions manual SICES Empowering your control e In TEST P 0222 parameter is set on 0 The normal AUTOMATIC operation logic if GCU controls GCB switches will be therefore 1 Engine stopped and GCB
2. SICES Empowering your control On GC500x the value 3 is not available the value 2 is used instead For MSB MSTP and MSB MPtM systems the synchronization for the closing of MCB P 0855 3 may be required In this case an external synchronizer both for controlling soeed voltage and to consent closing is mandatory required It is possible to e Use a MCU in this case nothing else is required e Use an external synchronizer o Connect the synchronization request for the closing of MCB to a digital input of all GCUs in parallel DIF 1034 for DST4602x and GC400x DIF 0052 for GC500x Use separation diodes see GCU technical manual for parallel connection of digital inputs o If an analogue synchronizer is used it should be connected in parallel to an analogue input of all the GCUs In this case it is necessary to DST4602x Configure the analogue input with AIF 2104 function and use P 0817 and P 0818 parameters for input scaling Alternatively use AIF 2105 function and use a conversion curve for scaling see GCU technical manuals GC400x Use the function AIF 2105 and use a conversion curve for scaling see GCU technical manuals GC500x Select the required analogue input with P 0833 parameter and use P 0835 and P 0836 parameters for input scaling o To use a digital UP DOWN synchronizer it is necessary to Use an external DIPOT module produced by SICES Srl to convert UP DOWN controls in
3. The less priority generator among the supplying ones is stopped when the DPRtn value is lower than the threshold set with P 0828 parameter deactivation threshold without interruption for the time configured in P 0829 deactivation delay In the same way the generator with the higher priority among those stopped by the load function is started if the DPRt value is higher than the threshold set with P 0826 parameter activation threshold without interruption for the time configured in P 0827 activation delay Warning P 0826 threshold and P 0828 threshold should differ only by the hysteresis desired to give to the system For example by requiring the intervention of a generator when all the other ones are at 80 of their nominal power P 0826 80 then the stopping of a generator will be needed when with the current load generators that would go on supplying would remain with a power lower than 75 of the rated one P 0828 In this example a hysteresis of 5 has been used P 0826 should be set on a value higher than P 0828 P 0830 parameter allows setting a further delay when a GCU closes its own switch the load function is temporarily disabled for the first P 0830 seconds In the previous description we talked of generator with less priority In fact the logic is based on the priority concept connected to single generators Internally the GCUs produce a list of generators by pla
4. Maximum voltage coocccocccocnccncccocncnnncnncnonanonanonnnnnnnos 61 3 2 10 59 U gt protection Maximum voltage ccooocccocccnoncncnncnnoncnnoncnnnacinoncnnnas 62 3 2 11 81 f lt lt protection Minimum TequenNCy ccccoccccnonccccnnccconacoconaciconacicnnacinos 63 3 2 12 81 f lt protection Minimum TequenNCy oocccocccconcccnncccnncononcnnnncnnnncnnnncnnnas 64 3 2 13 81 f gt gt Maximum TrEQUENCY cccceeccseeeceeeceeeeseeeceeeeeeeeneeeseueeaeeenaess 64 3 2 14 Olt MAXIMUM ATEQUCIICY asnicar 65 3 2 15 Protection 81R Af At o ROCOP cocccccnccncnocononocononocononacnnnnnnnononnnononcnonnns 66 3 2 16 78 protection Vector SUIQE ccccccceeecseeeceeeceeeeseeeceueeeueeseeesueeaeeenaess 67 Sl OPEO SCO CIN CS suscconiscaia eee ete 68 4 Management of speed and tension regulatorS omcooonnncccononcccccnnnncnnnnnnnonannnnnnanoos 70 Parallel functions manual SICES SICES Empowering your control Ak lt sOMMeCHOM TO HOM FEQUIAON ecto cecacecdccdaccatandoaceteedaceetaceaccatanesancteecncstacenceetcecoecene 70 4 2 Voltage regulator management ccccccseccceeeceeeeeeeeneeeeeeeeeeeeseeeseeeeaueeseeeseeesaes 72 AS NOMINA DOW Cl usd doi 74 A oe e o en 74 o A E vie ets ube yecbnbe sere vabowereunbexereseueneuees 74 142 SIMPIICA MENO acccecnseconecteccascatecanncceacesceeesaceccetseconceaccoseanecanaecencceeemaeceneates 75 4 4 3 General remarks
5. Only for DST4602x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence W024 early warning is equivalent to Parallel functions manual 37 SICES Empowering your control a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 e MCB and MGCB switches if any are both closed For the logic of normal operation of the system in AUTO see the description for MPM system Switching of users to mains or to parallel bars For MPM and MSB systems which therefore do not provide for a parallel with mains GCUs are able to control one or two external switches in order to connect the users to the parallel bars of the generators and or to mains without any external device The two switches are named e GTS Generators Transfer Switch It is the switch connecting the load users to the parallel bars of the generators Elsewhere in the manual this swit
6. S Triggering delay Reset timer s Reset delay Triggering of rotection P Triggering Reset event event 3 2 4 Common to all the protections for the parallel with mains The information contained in this chapter refers to all protections for the parallel with mains they will not be described again in the chapters on each single protections 3 2 4 1 Events archive When a protection for the parallel with mains is triggered GCU registers the related event in the record file DST4602x and GC400x also records the reset event for each individual protection All GCUs anyway record EVT 1099 event that is not linked to a specific protection it is recorded when the latest triggered protection is reset so when there are more active protections for the parallel with mains 3 2 4 2 Digital outputs It is possible to configure an output of GCU to report the overall status of protections for the parallel with mains DOF 3034 for DST4602x and GC400x DOF 0040 for GC500x The output configured in this way Is e Immediately disabled when a protection is triggered e Immediately activated when all protections have been re set NOTE with P 0901 parameter it is possible to configure the minimum activation time of this output even if the failure of the mains lasts less than P 0901 seconds the output will be activated for this time It is possible to use this output to open any switches 54 Parallel functions manua
7. SICES Empowering your control The internal voltage reference will be scaled linearly between the values set in P 0862 and P 0863 P 0861 0 if the internal reference minimum voltage is 0 the analogue output will take P 0862 value if the internal reference maximum voltage is 100 the analogue output will take P 0863 value P 0861 1 if the internal reference minimum voltage is 0 the analogue output will take P 0863 value if the internal reference maximum voltage is 100 the analogue output will take P 0862 value o Suggested Use AOF 1003 function to configure the output In this case the scaling between the internal speed reference and the analogue output value should be performed through a conversion curve see GCU technical manual P 0861 P 0862 e P 0863 parameters are ignored e Through two digital outputs UP DOWN This function is not supported on GC400x GCU offers the following functions for the configuration of the digital outputs o DOF 2211 for DST4602x or DOF 0053 for GC500x GCU generates pulses on this output to increase alternator voltage o DOF 2212 for DST4602x or DOF 0054 for GC500x GCU generates pulses on this output to decrease alternator voltage o DOF 2213 for DST4602x or DOF 0055 for GC500x This control is optional and can be used only on voltage regulators that provide the appropriate input GCU activates this output when it wants to bring the alternator voltage back to r
8. As described in paragraph 4 it s possible to correct the voltage of the alternator by managing the GCU instead of the voltage regulator This regulation called fine tuning will be used as basic command for the voltage regulator the starting point for the various Pl regulators which are used in the parallel logics With all the controllers except for GC400x when the genset works in isochronous and it is not in parallel with neither mains nor other gensets the command that is sent to the voltage regulator is equal to the fine tuning value In these conditions indeed no reactive power is required set by the load The voltage regulation is managed by the voltage regulator that will increase decrease the alternator excitation current in order to guarantee that the voltage is the one required with the fine tuning command By default GC400x works in the same way too Anyhow it is possible to enable the control of the voltage see 5 2 with the parameters e P 1650 0 it enables the voltage control when GCB is open e P 1600 1 it enables the frequency control when the GCB is closed and the genset works in isochronous and it is not in parallel with neither mains nor other gensets GCU provides P 0867 parameter for the fine tuning of voltage It is a percentage value the value of 50 should correspond to the rated voltage of the alternator the value of 0 should correspond to the minimum voltage and the value of
9. Empowering your control This document is owned by SICES s r l All rights reserved SICES s r l reserves the right to modify this document without prior notice SICES s r l has made any effort to ensure that the information herein provide are correct in any case SICES does not assume any liability for the use these information The disclosure by any means of this document to third parties is not allowed S 1 C E S SRL Societa Italiana Costruzioni Elettriche Sumirago Via Molinello 8B 21040 Jerago con Orago VA ITALY T 39 0331 212941 F 39 0331 216102 wWWww sices eu sales sices eu SICES BRASIL LTDA Avenida Portugal 1174 Condominio Empresarial ONIX 06696 060 ITAPEVI SP T 55 11 4193 2008 www sicesbrasil com br contatoOsicesbrasil com br
10. If GCB is not opened GCU activates A024 shutdown GCB not open 9 MCB open GCB open The procedure however goes on from step 10 because there is no reason to keep MCB open 10 Closing of MCB without synchronization three attempts when MCB closes the procedure goes on from step 3 If MCB doesn t close W013 early warning is activated MCB not closed The procedure comes back to step 8 if the request for automatic intervention of the generator is still present and there are no shutdowns deactivations and discharges otherwise it goes on from step 11 11 Engine stop 2 4 5 SPtM SSB Single Parallel to Mains Single Stand By Single parallel system to mains with possibility to operate stand alone as well See notes in 2 4 that applies to this system too In this type of system the generator can deliver both stand alone and in parallel with mains It is very similar to system SSB SSTP The differences with reference to it are e This system is not an emergency system then the request for automatic triggering of the generator is not linked to the status of the mains e The continuative parallel with mains P 0880 gt 0 should be allowed otherwise GCU activates A273 inconsistent parameters shutdown If there are no inhibitions to starting GCU starts the generator Then it closes GCB switch e With synchronization if the status of the mains authorizes the parallel see 3 e Without synchronization
11. 0 5 A 1 lace 1 5 Actually there is an instantaneous switch on the alternator skip of the voltage vectors i e the period of the sinusoid where the fault occurs on the mains can be longer or shorter than the previous and next ones This protection detects this skip It is possible to configure the width of the skip degrees and the sign of the skip the example shows a negative skip the period lasts less than normal periods but it could also happen the opposite 3 2 16 1 omgurauen Valid values P 0941 Triggering direction LA E P 0942 Triggering threshold 0 0 30 0 EVT 1096 Triggered protection EVT 1156 Protection reset ra and GC400x Parallel functions manual 67 SICES Empowering your control functions DOF 0103 AND OR logic with status ST 058 triggered protection The protection can be disabled by setting the triggering threshold to 0 0 P 0941 parameter allows enabling the protection for positive phase skips 1 for negative phase skips 2 or both 3 For this protection there is no triggering delay the phase skip in fact happens only once at the time of failure and thus the protection should intervene immediately as soon as it is detected Nor is there a reset threshold since the period following the triggering is already a normal period There are no parameters to configure reset delay The delay is 700 ms on DST4602x and GC400x 0 ms on GC500x Note when the prot
12. DST4602x and GC400x e 27 T DST4602x and GC400x e 27 Q gt 8 U lt DST4602x and GC400x e 59 U gt gt e 59 U gt DST4602x and GC400x P 0908 15 parameter is available DST4602x and GC400x GC500x behave as if this parameter were set to 0 50 Parallel functions manual SICES Empowering your control GCU can use two different ways to manage voltage hysteresis e P 0908 15 0 In this mode P 0911 is managed as a percentage of rated voltage P 0116 This is the only mode available for GC500x Soglia di scatto P 0911 P 0116 100 Soglia di scatto P 0911 P 0116 100 Soglia di ripristino 27 Soglia di ripristino 59 Example for 27 protections P 0116 15000 Vac P 0911 2 0 Configured threshold 80 0 Intervention threshold 12000 Vac Reset threshold 12300 Vac e P 0908 15 1 In this mode P 0911 is managed as a percentage of the threshold This mode is not available for GC500x sogti di scatto PA A a scatto 7 2211 P 0116 Soglia di ripristi 27 oglia di ripristino 27 100 sogti di scatto Sogra d see ES 2211 P 0116 Soglia di ripristino 59 100 Example for 27 protections P 0116 15000 Vac P 0911 2 0 Configured threshold 80 0 Intervention threshold 12000 Vac Reset threshold 12240 Vac 3 2 2 2 Hysteresis on frequency thresholds Valid values P 0921 Hysteresis on frequency for the 0 1 10 0 protections for the parallel with m
13. In this case the engine has no problems but it is anyway necessary to limit the current supplied by the alternator Marelli says between 8 and 15 depending on the alternator In fact when mains voltage decreases given the same supplied current the supplied power decreases too To try to maintain the same power currents should be increased but at the risk of overcoming the limits of the alternator To manage this situation DST4602x manages these new parameters e P 0959 mains low voltage threshold for active power setpoint limitation of rated one e P 0960 delay for active power setpoint limitation for mains low voltage s Voltage limitation applies if average mains voltage stays under P 0959 threshold for P 0960 time Power limitation is immediately removed if the average voltage of the generator rises back above P 0959 threshold e P 0967 power limitation ratio power for 1 of voltage Set this parameter to 2 means a limitation of 2 with reference to nominal power for a voltage drop of 1 of rated voltage with reference to P 0959 threshold DST4602x records EVT 1129 and EVT 1130 events when it enables disables this limitation By assuming to set P 0959 98 0 392V P 0960 3 0 s and P 0967 1 the following power reduction curve due to low voltage will be achieved Potenza 102 00 100 00 98 00 96 00 94 00 92 00 90 00 88 00 86 00 410 0 400 0 390 0 380 0 370 0 360 0 350 0 340 0 330 0 Tensione Vo
14. Parallel functions manual 79 SICES Empowering your control e P 1600 2 it enable the voltage control when GCB is closed and the genset works in isochronous and it is not in parallel neither with the mains nor with other gensets If it is disabled refer to paragraph 5 2 as per the other controllers The plus of enabling the regulation PI is that the system is no longer subject to little analogue command faults Even if there were changes of GCU values and voltage regulator GCU would vary the command until the frequency measured will be the one required If the Pl is enabled GCU set P 1654 as frequency set point It is a value expressed in Hz P 1604 parameter can be changed directly through the GCU display even if the genset is running GCU display provides a page related to the synchronization see the user s manual that allows to change this parameter without entering the programming Note the parameter P 1654 is automatically shared among all the GCU connected to the CanBus PMCB As an alternative to the parameter P 1654 it is possible to use an analogue input to acquire the voltage set point usually connected to a potentiometer on the panel By using an analogue input the P 1654 parameter is no longer used and it s not possible to change the voltage set point on GCU Anyhow on the display page dedicated to the synchronization GCU shows the voltage set point value acquired by the analogue input
15. evene if some gensets work in different modes Therefore this function can work with older GCU that don t support the SYSTEM BASE LOAD mode The reference for the power factor is unique for the entire plant and it is the same on all GCU that work in this mode It is possible to set this reference in two ways e Byusing the parameter P 0860 see the previous paragraph The parameter is automatically shared among all GCU It s possible to change this parameter by any GCU All GCU allow to change this parameter directly on the display that shows the electrical diagram of the plant e By using an analogue input configured with the function AIF 2405 The conversion of the value acquired by the analogue input in the setpoint for the power factor is carried out by means of a conversion curve see technical manual The analogue signal must be connected to the GCU with lower address in fact this one converts the signal in a setpoint for the power factor and sends it to the other GCU Anyhow it is possible and suggested to connect the analogue signal to all the controllers in this way if the controller with the lower address is broken the following one takes its place and the system continues to work The setpoint acquired is displayed on all GCU on the page that shows the electrical diagram of the plant 9 6 2 Active power control This paragraph defines the logic used by GCU to determine what mode should be used to acquire activ
16. for the generators which should be stopped because not needed to support the load stand alone supply e In TEST and in REMOTE START always ignoring inhibitions to starting DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence W024 early warning is equivalent to a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required 46 Parallel functions manual Empowering your control e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 For the logic of normal operation of the system in AUTO see the description for MSB MSTP system Parallel functions manual 47 SICES Empowering your control 3 Use of mains bars sensor for the parallel with mains GCU should know the status of the power mains for two reasons e Insystems that do emergency service in order to decide whether to start stop the generator automatically e In systems that manage the supply in parallel wi
17. if not already closed The engine is left in action for a configurable time without load to allow its cooling cooling cycle In the end GCU stops the engine e Alarm This term is used to indicate an anomaly that requires the stop of generator There are immediate risks for the generator that therefore should be stopped immediately The intervention sequence is O O 1 3 2 Acronyms AIF AOF ADPs ADPt BTB BTBCU CBE DIF DOF DPRt GCU opens immediately the generator switch GCB regardless of the power supplied by the generator If necessary it closes mains switch MCB where provided if not already closed GCU stops the engine without executing the cooling cycle Identifies a function for configuring analogue inputs Analogue Input Function The number that follows the wording AIF represents the code to be set in the parameter that configures the function of the desired analogue input Identifies a function for configuring analogue outputs Analogue Output Function The number that follows the wording AOF is the code to be set in the parameter that configures the function of the desired analogue output Indicates the active power kW supplied by a generator Indicates the active power kW supplied by all generators in parallel it is the sum of the related ADPs This term identifies a switch also called connector used for connecting separating two different parallel b
18. it is not possible to force a gradual transfer of power to the generator before opening the switch if the generator is in parallel with mains DST4602x and GC400x to open MCB switch with stopped engine MCB key should be pushed or with the combination of keys SHIFT GCB on some version of GC500 and GC500Plus for 5 seconds If the keys to connect the generator in parallel with mains are used but continuative parallel isn t allowed P 0880 0 GCU after the scheduled time limit see above opens the switch closed from a longer time when GCB closes it opens MCB and vice versa Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no inhibition to starting is activated and if mains is out of tolerance e In TEST and in REMOTE START always by ignoring inhibitions to starting and mains status By setting P 0221 parameter to a value different from 0 GCU will be configured to keep generator in supplying phase in case of failure failure to closing of MCB switch if there aren t shutdowns deactivations and discharges In this case the presence of W013 early warning 18 Parallel functions manual SICES Empowering your control MCB not closed corresponds to a request for an automatic intervention of the generator which will be annulled only when the operator recognizes the early warning By setting P 0221 parameter to value 2 GCU is confi
19. o Sum of active powers of all supplying generators ADP 122 Parallel functions manual SICES Empowering your control o The load that generators can still support RESt MDPt ADPt o The load that generators could still support if the one with less priority were stopped REStn MDPtn ADP e Supposing that the first level of power reserve is selected P 1207 1 o A new generator is started if RESt lt P 1201 for the period of time configured with P 0827 o The less priority generator is stopped when REStn gt P 1202 for the time configured with P 0829 Therefore parameter P 1202 should be always set on a value higher than P 1201 and the same is valid for the other couples of parameters if we set P 1201 to 200 kW a new generator will be started in the event that the already supplying ones cannot support further 200 kW but afterwards this generator will be stopped only when the system calculates that without it the remaining generators can support for example further 220 kW Without this hysteresis even a variation of just 1 KW of the load could continuously start stop generators A power reserve level is considered valid only if both its parameters P 1201 and P 1202 for the first level are different from zero and if the first one is lower than the second one In case a non valid power reserve level is selected the function will be disabled The operator has the possibility to se
20. opening MCB first to supply stand alone The closing with synchronization of at least one switch preferably both should be possible otherwise GCU activates A273 inconsistent parameters shutdown As the stand alone supply is allowed it is preferable but not mandatory to select MCB as interface switch P 0900 2 Please refer to the paragraph 3 for all regulations that rules parallel with mains Main status The status of the power mains is critical for this kind of system and should be acquired by GCU It is used to allow or not the parallel with mains Refer 2 4 to notes on the mains sensor Parallel functions manual 27 SICES Empowering your control MCB command P 0855 parameter allows configuring how GCU manages MCB switch e P 0855 0 MCB controlled by GCU synchronization not available e P 0855 1 MCB controlled by GCU synchronization available e P 0855 2 MCB controlled externally synchronization not available e DST4602x and GC400x P 0855 3 MCB controlled externally synchronization not available On GC500x the value 3 is not available the value 2 is used instead If synchronization is required and MCB is controlled externally a digital input to request activation of the synchronization DIF 1034 function for DST4602x and GC400x DIF 0052 function for GC500x should exist The MCB key of the GCU panel or the combination of keys SHIFT GCB on GC500 GC500Plus and GC400 can
21. or DIF 0058 function for GC500x is active active power modulation is disabled and the rom regulator is controlled as indicated in 5 1 In this mode the operator does not directly select the active power setpoint for the generator but rather selects the power value that should be guaranteed at the interchange point with mains By convention negative values for the measurement of power at the interchange point with mains indicate power transferred to mains exported GCU should however acquire the power measurement at the interchange point with mains Once this power is known and the actual power delivered by the generator is known too GCU is able to calculate the power that should be supplied by the generator to make sure that in the interchange point with mains there is the required power This even if the local load users is very variable GCU offers P 088 parameter kW to set the power setpoint on the interchange point with mains negative if the power of the system should be exported to mains lt is not possible to use the analogue inputs to acquire this setpoint To acquire the power measurement at the interchange point with mains on the other hand there are three possibilities e Use an external tool to measure power and connect the instrument to an analogue input of GCU In this case 104 Parallel functions manual SICES Empowering your control o DST4602x Obsolete Configure the desired analogue input with
22. sum of rated values minus the sum of supplied active powers is higher than the needed reserve The function power reserve can be configured with the following parameters P 1201 and P 1202 thresholds in kW relevant to the first power reserve level P 1203 and P 1204 thresholds in kW relevant to the second power reserve level P 1205 and P 1206 thresholds in kW relevant to the third power reserve level P 1207 select a power reserve level o 0 power reserve function disabled o 1 power reserve function enabled on thresholds P 1201 and P 1202 o 2 power reserve function enabled on thresholds P 1203 and P 1204 o 3 power reserve function enabled on thresholds P 1205 and P 1206 The operator has the possibility to set three different power reserves and the select them simply by changing P 1207 parameter that can be modified also through the serial ports therefore also from remote These parameters are automatically shared among the GCUs so by varying a parameter on a GCU it is automatically modified on all the other ones For any level of power reserve there are two thresholds in order to have a minimum of hysteresis The logic is the following one In a specific moment the system calculates o Sum of nominal powers of all supplying generators MDPt o Sum of nominal powers of all supplying generators safe for the less priority one the one that should stop if the load status allows that MDPtn
23. 2710 siria isisi 105 AIF 2305 cccccccccccccccccccccccceceeeeeeeeeceseeeeeuueeeeeeeeeess 89 DIPOI arai ieai 85 AIF 2400 cccccccccccccccccccccecccececececeesseeeeeeeeeeeeess 104 DILO i ai 64 AIF 2401 cccccccccccccccccccccccceccceceeseessestensccececececees 104 DIA otero 67 IZ O 91 DIF 3001 n 10 14 18 26 31 36 AIF 2408 coooooccnnnnnnnnnnnnnnnnnnnnnnnnnnnnononnnnnnnnnnnnnnnnnnnoss 91 DIF 3002 nn 13 17 25 30 35 AIF 2405 ccoccnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonoss 91 DIF 3008 cococcnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonononnnnnnnnnnnnnnnnss 35 AOF 1000 enunciada 80 DIF 3004 cooocnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnononnnnnnnnnnnnnnss 102 O o eee E E EE 80 BD nC 0 0 oe 112 O o 6 en ee eee 81 DIF 3101 cecer 9 34 53 TN 0e A 82 DIF 3102 eicecien 9 34 94 D DIF 8103 eee 9 34 53 DOF 0026 ccccccccccccecccseceeseececttcccccceccccceeeeeeeeeees 93 DIF 0006 cccccceeeeeeeeeeeseeeeees 13 17 25 30 35 DOF 0028 o cccccccccccccccccscceeseececseccccecccceceeeeeeeeeees 93 DIF 0007 cccc0eeeeeeeeeeeeeees 10 14 18 26 31 36 DOF 010 coconnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonononinnnnnss 42 DIF 0026 ccccccccceeeeeseesssessseseessceesssseeeeeeseceeeeees 7 DOF 010 42 DIODOS 7 aaeeea EEEE R EErEE 8 DOF 0033 coconnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnss 112 DIF 0030 cccccceesesesesssessssessesssscessseeeseeeceeseeeees 6 DOF 00BB ee 93 A lt seen ae eee e nner oeeeR 120 DO 0
24. 5 5 e P 0895 e P 0896 parameters configure Pl controller for reactive power acting on voltage regulator For the calibration of the above parameters see 4 3 In the following paragraphs the different operating ways involving different power setpoints will be described Remember that the calculated power setpoint may be limited due to anomalous conditions of the mains see 5 6 3 During loading phase and unloading phase phases GCU behaves exactly as described in the chapter dedicated to active reactive power distribution see 5 5 GCU offers two additional parameters when the generator delivers in parallel with mains e P 0876 P 0125 s It indicates the maximum percentage variation in active power setpoint per unit of time it sets a limit to the speed with which GCU pursues the calculated setpoint thus avoiding fast oscillations of the setpoint value Especially in IMPORT EXPORT mode indeed the active power setpoint can change very quickly The default value for this parameter is 100 s which is equivalent to set no limits e P 0898 P 0125 This parameter identifies the minimum difference between the active power supplied by the generator and the calculated setpoint below of this difference GCU stops pursuing the calculated setpoint and keeps the rpm regulator control stable It is used to prevent small oscillations of the active power supplied around the setpoint due to a non optimal calibration of the PI cont
25. 90 99 103 105 106 AIF 2101 ccccccccccccccccccccccccccecesseeseeceettttscsusuceceeees 85 DIF 2096 n 21 23 33 105 AIF 2102 ccccccccccccccccccccececcssceeseeecttttscsceeceeeees 95 96 DIRE 0e T E EA oe EE 111 AIF 2108 oooooconnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonnnnnnnnss 95 97 DB 026 oe E 111 IT cccccccccccccccccccccceccssceeseeecttttscsececeeeees 35 96 AA A A 121 AIF 2105 cocccnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnononnnnnnss 35 96 DIE ui alista 42 AIF 2106 ccccccccccccccccccccccecececeeeceeeeeeeeeueueeeeeueeess 95 DIE a id iia 102 PIF 2 NO E ES 95 DIF 2330 coooocncnnnnnnnnnnnnnnnnnnnnnnnnnnonnnnnnononnnnnnininnnss 124 AIF 2108 A E T 101 DIA ooccccccccccccccccccceccccceeeceeeeuuueueeeueuseueuuanaess 124 AIF 2109 serinati iia Aia 102 DIF 2332 oo cccccccccccccccccccceceecceeeeueueuueeuuuueueuuueaess 124 AAA O E 86 DIF 2333 oo ccccccccccccccccceccecececcueueuueuueeeeuueueuuueuess 124 AIF 2201 ccccccccccccccccccccccecccsceeseeesstttscsceeccecess 86 87 DIF 2501 sssssnnnnnnnnnnnnnnrnrinnrnrrrrnrnrrnrinrrrrrrn 7 AIF 2300 oococccnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnss 105 D niy20 0 6 AIF 2301 cooocccnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnss 105 DIF 2702 sirios 120 Nee 106 DIF 2707 asiendo eee 115 AIF 2308 cooccccnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnoss 106 107 DIF 2708 cocconnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnninnnnos 71 73 Ne cocooncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonoss 89 DIF
26. In case of failure to open GCU activates W023 early warning DST4602x and GC400x to open MCB switch with stopped engine press the key for 5 seconds Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no starting inhibition has been activated e In TEST and in REMOTE START always ignoring inhibitions to starting DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence of W024 early warning GCB not open corresponds to a request for an automatic intervention of the generator which will be annulled only when the operator recognizes the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e The protections for the parallel with mains have been triggered MCB is closed and GCB is the interface switch or anyway if MCB does not open within 0 5 seconds e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 30 Parallel functions manual SICES Empowering your control Moreover it has to decide whether MCB switch has to be
27. Prime Mover ccccccsecceecsecseeeeeeeeeeeeeeeeeeeceeeeeseeeeeaeess 34 202 MSB Muliple Sand By escriba 37 2 5 3 MSB MSTP Multiple Stand by Multiple Short Time Parallel 39 2 5 4 MPtM Multiple Parallel to Mains cooccoccccnconconiconconcccncononnncancnconnnnanos 43 2 5 5 MPtM MSB Multiple Parallel to Mains Multiple Stand By 45 3 Use of mains bars sensor for the parallel with mains ccsssessseseeeeees 48 3 1 Use of the external SENSOTM ccccceccceecceeccceeeceeceucecseeseeeseueesseeseeeseueeeeeeseeesees 48 3 2 Use of the internal SCNSOLS cccccsccceecceeccceeeceeceucecseeseeceueesseeseeeseueenseeseeesags 48 S2 AUIMONZANOI IO paralelas ion 49 32 2 Management Or Ste SIGs crecevecssuccracccaceencecucercatceanrcassacdxesseasiescaveceraceansteaes 50 92 9 ic ne A e 53 3 2 4 Common to all the protections for the parallel with mains 54 3 2 5 27 U lt lt protection Minimum voltage oocccoccccoccnconcnnnncnnoncnnoncnnoncnconcncnnens 55 3 2 6 27 U lt lt protection MINIMUM voltage oocccoccccoccnconcnconcnnnncncnncnnoncnconcnonnoos 55 3 2 7 Protection T 27 time dependent low voltage coooccconccconccconcnconcnnonos 56 3 2 8 27 Q gt amp U lt protection Minimum voltage amp directional reactive 59 3 2 9 59 U gt gt protection
28. TEST mode e By activating the REMOTE START mode 2 3 1 Forcing of intervention in TEST mode When the TEST mode has been activated GCU always controls the starting of the generator the function of inhibition of starting the generator is not active in this mode With P 0222 parameter it is possible to configure whether GCB switch should be closed in TEST mode e P 0222 0 GCB switch should not be closed e P 0222 1 GCB switch should be closed unless the function of inhibition to power load has been activated It is possible to activate the TEST mode in several ways e By configuring a digital input with DIF 2031 DST4602x and GC400x or DIF 0026 functions for GC500x When this input is active GCU goes into TEST mode e Using P 0418 P 0419 and P 0420 parameters it is possible to select the days of the week and a time frame within which GCU goes into TEST mode e Through the controls of serial ports see Modbus registers o Holding register 20 By writing the value 6 into the register GCU switches to TEST GCU cancels this control if for a minute it does not receive messages on the serial port By writing the value 7 into the same register GCU comes back to AUTO DST4602x and GC400x Holding register 101 e 102 First of all it is necessary to write the value configured the P 0004 parameter in the register 101 password within 5 seconds by writing the value 12 in the register 102 GCU switches to TEST GCU cancels
29. Use DIF 3001 DST4602x and GC400x or DIF 0007 functions for GC500x to configure the input that acquires the feedback Since the system allows parallel with mains it s mandatory to connect the feedback of GCB switch GCU uses it to e Correctly display the status of the switch e Recognize the status of parallel with mains and activate the appropriate adjusting methods of the active and reactive power e Since the system allows parallel with mains the anomalies of failure to open and to close GCB are always managed Sets a delay different from zero for the digital input that acquires the feedback this delay is used as the opening closing time limit of the switch otherwise a time limit of 2 seconds is used Function valbitty PMCB communication bus Not required Protections for the parallel with mains Available Parallel functions Power modulation in parallel with mains in BASE Available LOAD mode Power modulation in parallel with mains in Available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Available Transfer to the generators function Not available DROOP mode Available 24 Parallel functions manual Empowering your control Further restrictions for the closing of GCB GCB switch can only be closed if MCB is closed and if the status of the mains authorizes the parallel It can therefore be closed only with synchronization Further notes on the sequence MCB switc
30. a GCB switch is closed GCUs calculate the rated power of the generators with GCB closed and if greater than P 0806 the procedure goes on from step 4 If all available generators have closed their GCB switch anyway the procedure goes on from step 4 If MTS switch has been configured GCUs will control its opening and wait for the time set with P 0219 parameter exchange time GCUs control the closing of GTS When a generator should come out from the parallel GCU orders The opening of GTS switch If MTS has been configured it waits P 0219 time and controls the closing of MTS switch Then it opens its own GCB switch The previous controls have no effect on MTS and GTS switches and if there are other generators that are still supplying GTS switch will be actually opened only when the last GCU will require its opening MTS switch will be actually closed only when the last GCU will require its closing Note failure to open close MTS and GTS early warnings are not managed 2 5 3 MSB MSTP Multiple Stand by Multiple Short Time Parallel Emergency multiple system with fleeting parallel See notes in 2 5 that applies to this system too This type of system is very similar to the previous one it provides one or more generators that perform emergency service to mains GCU provides to start the generator if the mains is out of tolerance from the configured time it stops it if mains is within tolerance for the
31. a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 It is preferable to use those outputs to control the opening of the switches 3 2 14 2 Description of operations See diagram 3 2 3 2 See the common notes in 3 2 4 The protection is triggered when mains frequency is above the triggering threshold consecutively for the triggering delay The protection is reset when the mains frequency is below the reset threshold consecutively for the reset delay 3 2 15 Protection 81R Af At o ROCOF This protection does not directly control mains frequency but it controls speed frequency variations over time This protection is not triggered due to slow changes in frequency but intervenes immediately in case of fast changes before frequency becomes too high or too low It is possible to enable the protection to intervene on increases of frequency only on decreases only or both 3 2 15 1 eonngurenen possi Tiggeing ren f Pn P 0932 Triggering threshold Hz s 0 1 100 P 0933 Triggering delay s 000 6000 EVT 1095 Triggered protection EVT 1155 Protection reset SST and GC400x functions DOF 0103 AND OR logic with status ST 057 triggered protection The protection can be disabled by setting the triggering delay to 0 0 P 0931 parameter allows enabling the protection for increases of frequency 1 decreases of frequency 2 or both 3 This protection does not use any hysteresi
32. analogue inputs e P 0881 2 IMPORT EXPORT GCU calculates a power setpoint for the generator so that power exchanged with the mains reaches the required value P 0888 GCU controls the output of the generator to bring it to the calculated setpoint If the protections for the parallel with the mains have been triggered the procedure goes on from step 7 when the interface device is GCB P 0900 1 from step 8 when the interface switch is MCB P 0900 2 If the generator should to be stopped due to serious problems shutdowns or deactivations the procedure goes on from step 7 If the generator should be stopped due to other reasons discharges or if automatic intervention is no longer required the procedure goes on from step 6 If an inhibition to power load is active the procedure goes on from step 6 Power discharge The power of the generator is reduced to 0 kW with a rhythm that can be configured with P 0874 parameter or P 0875 if there are discharges This phase lasts until the power of the generator becomes lower than P 0878 threshold or after the time limit configured with P 0879 Then the procedure goes on from step 7 If in the meantime shutdowns or disconnections have been triggered the procedure goes on directly from step 7 Instead if protections for parallel with mains have been triggered the procedure goes on from step 7 or 8 depending on which switch is the interface device P 0900 Opening of
33. both operations provided that the two voltage three phase systems are connected to their two three phase sensors see the technical manual for the connections and the configuration of the two three phase sensors But it is also able to work with external devices called synchronizers in this case GCU is just a medium to send the speed control created by the external synchronizer to the rom regulator Finally GCU is able to leave the control of the rom regulator to an external synchronizer but to internally manage the synchro check All this depends on the programming parameters of GCU GCU is potentially able to manage synchronization for both GCB and MCB switches 9 4 1 Digital Output functions GCU offers the following functions for the digital outputs related to synchronization e DOF 3091 for DST4602x and GC400x It indicates that the synchronization is in progress for the closing of GCB e DOF 3092 for DST4602x and GC400x or DOF 0028 for GC500x It indicates that the synchronization is in progress for the closing of MCB e DOF 3093 for DST4602x and GC400x or DOF 0026 for GC500x It indicates that the synchronization for the closing of MCB or GCB is in progress e DOF 3094 for DST4602x and GC400x or DOF 0036 for GC500x It indicates that the synchronization for the closing of MCB or GCB is in progress and that in this moment the two voltage three phase systems are synchronized Parallel functions manual SIC
34. by GCU synchronization available e DST4602x and GC400x P 0854 2 GCB controlled externally synchronization not available 16 Parallel functions manual SICES Empowering your control e DST4602x and GC400x P 0854 3 GCB controlled externally synchronization available If synchronization is required and GCB switch is controlled externally DST4602x and GC400x a digital input to require the activation of synchronization DIF 1004 function should exist The GCB key of the panel can be used in MAN mode to open and close the switch if controlled by GCU Feedback GCB Use DIF 3001 function DST4602x and GC400x or DIF 0007 function only for GC500x to configure the input that gets the feedback Since the system allows parallel with mains it s mandatory to connect the feedback of GCB switch GCU uses it to e Correctly display the status of the switch e Determine the presence of voltage on the parallel bars to decide whether the closing of switches can be done via synchronization e Recognize the status of parallel with mains and activate the appropriate adjusting methods of the active and reactive power e Since the system allows parallel with mains anomalies regarding failure to opening and failure to closing of GCB switch are always managed Sets a delay different from zero for the digital input that acquires the feedback this delay is used as the opening closing time limit of the switch otherwise a time li
35. closed or not MCB is always closed except if e tis configured as interface device P 0900 2 when GCB switch is closed and the protections for the parallel with mains have been triggered e The transfer to generators mode DIF 2096 has been activated See SSB SSTP system for exemplificative sequence 2 5 Systems consisting of more than one generator All the following systems require the use of one or more generators that work in parallel among them For these types of systems it is possible but not mandatory to use MCU devices to manage the mains both for emergency functions and for parallel with mains protections and MCB and MGCB switches If MCUs are used it is not necessary to connect the feedbacks of MCB and MGCB to the digital inputs of GCUs since all information is shared on PMCB network For these types of systems it should always be possible to use synchronization to close GCB switch It is possible to use the internal synchronizer of GCU or an external synchronizer To use the internal synchronizer it is necessary to connect parallel bars to mains sensor GCU bars Main status If mains sensor GCU bars are used for parallel bars GCU will no longer be able to directly acquire the status of the mains necessary for all systems except for MPM It will therefore be necessary to install external devices for this purpose These devices can be e MCU by SICES Srl in this case nothing else is required e Othe
36. configured time it stops it if mains is within tolerance for the configured time Parallel with mains is not allowed so it is never possible to execute the power discharge of the generator before the opening GCB switch therefore discharge anomalies behave as deactivations Main status The mains status is fundamental for this kind of system and it has to be obtained by GCU if it isn t obtained GCU considers mains always out of tolerance and provides to start the generator Refer 2 4 to notes on the mains sensor MCB command P 0855 parameter allows the configuration of the way GCU has to manage the switch e P 0855 0 MCB controlled by GCU e P 0855 1 Incorrect value for this kind of system GCU will act as if it were set on 0 e P 0855 2 MCB controlled externally e DST4602x and GC400x P 0855 3 Incorrect value for this kind of system GCU will act as if it were set on 2 The MCB key of the GCU panel or the combination of keys SHIFT GCB on GC500 GC500Plus and GC400x can be used in MAN to open and close the switch if controlled by GCU Feedback MCB Use DIF 3002 DST4602x and GC400x or DIF 0006 functions for GC500x to configure the input that acquires the feedback It isn t indispensable to connect the feedback of MCB switch If it is connected GCU uses it for e Correctly display the status of the switch e Prevent GCB from closing in case that MCB isn t open e It is possible to configure GCU
37. conversion curve see technical manual e GC400x Configure the analogue input with the AIF 2403 function In this way the conversion of the value acquired by the analogue input in no voltage is carried out by means of a conversion curve see technical manual Parallel functions manual 85 SICES Empowering your control e GC500x o Obsolete It is necessary to select an analogue input through P 0983 parameter any value other than 0 and 7 In this case there is no need to configure anything in the parameters related to the selected analogue input and P 0984 and P 0985 parameters are used for scaling the analogue input See description above for DST4602x o Suggested Setting the value 7 in P 0983 parameter In this case it is necessary to configure the analogue input with the desired AIF 2405 function see description above for DST4602x GCU allows setting the slope of the voltage DROOP curve with P 0987 parameter It indicates the percentage drop of voltage compared to nominal P 0102 when the machine is operating at inductive power factor 0 80 To use the DROOP voltage it is necessary to always enable its Pl regulator The parameters that configure the PI regulator for voltage DROOP are P 0989 and P 0990 By setting them both to zero the PI regulator will be disabled See 4 for the adjustment of the two parameters As a rule the DROOP is used for the parallel with the generators controlled by non SIC
38. delay 1 persist the protection is triggered and GCU activates the output configured with DOF 3035 function If the previous conditions persist for the triggering delay 2 as well GCU will activate also the output configured with DOF 3036 function NOTE the protection does not verifies switches feedbacks the second output is anyway activated if the fault on the mains lasts more than this time If the first triggering of the protection causes the immediate disconnection from the mains actually there are no conditions for the second triggering The protection is reset if all the following conditions are continuously monitored for re set delay e All mains voltages are above the reset threshold e 11 current is below the reset threshold e Q1 active power is below the reset threshold or has a different sign than configured in P 1232 3 2 9 59 U gt gt protection Maximum voltage 3 2 9 1 Configuration Valid values P 0908 05 Linked phase voltages DST4602x and 0 1 GC400x P 0914 Triggering threshold P 0116 60 0 150 0 P 0915 Triggering delay Is sf 0 00 60 00 EVT 1092 Triggered protection EVT 1152 Protection reset Pa and GC400x Parallel functions manual 61 SICES Empowering your control functions DOF 0103 AND OR logic with status ST 054 triggered protection P 0908 05 parameter available only on DST4602x and GC400x allows deciding if the protection works on mains linked voltages 0 or on p
39. function DOF 0103 AND OR logics with the status ST 104 the output activates when the genset is supplying but it is not in parallel neither with the mains nor with other gensets Frequency regulation This description is valid for GC400x only The PID for the frequency regulation must be clearly enabled e P 1600 0 it enables the frequency control when GCB is open e P 1600 2 it enable the frequency control when GCB is closed and the genset works in isochronous and it is not in parallel neither with the mains nor with other gensets If it is disabled refer to paragraph 5 2 as per the other controllers The plus of enabling the regulation PI is that the system is no longer subject to little analogue command faults Even if there were changes of GCU values and speed regulator GCU would vary the command until the frequency measured will be the one required If the Pl is enabled GCU set P 1604 as frequency set point It is a value expressed in Hz P 1604 parameter can be changed directly through the GCU display even if the genset is running GCU display provides a page related to the synchronization see the user s manual that allows to change this parameter without entering the programming Note the parameter P 1604 is automatically shared among all the GCU connected to the CanBus PMCB As an alternative to the parameter P 1604 it is possible to use an analogue input to acquire the frequency set point usually connected t
40. move to the nominal value GCUs can operate in two ways 9 5 2 1 Method 1 This method can be used on all GCU On GC400x check that the parameter P 1650 3 is set at 0 For the frequency regulation refer to 5 5 1 1 The parameter that configures the dead band for the reactive power sharing is P 0814 of the nominal reactive power e When the percentage error in the adjustment of reactive power is higher than P 0814 GCU controls the reactive power e When the percentage error in the regulation of reactive power is lower than P 0814 GCU sets the control for the voltage regulator back to the value used outside the parallel which corresponds to rated voltage or anyway to what as determined with the fine adjustment see 5 1 2 When a big load kW is applied to the parallel bar the bar voltage tends to decrease If a big inductive or capacitive load is removed the voltage tends to increase temporarily During these phases SICES GCUs gives higher priority to the voltage regulation more than to the reactive power regulation GCU indeed provides another parameter called extended dead band P 0815 for the reactive power This parameter must be configured at a higher value than the one used for the normal dead band in this way during the load transfer GCU accepts a higher regulation fault and increases the possibility to enter in dead band Consequently there is an increase also in the time percentage in which GCU require the
41. of GCB switch e DST4602x doesn t acquire in any way the status of presence absence of tension on parallel bars e DST4602x is in MAN or TEST mode e Other GCUs that don t support CBE function are connected to PMCB network GC500x GC400x DST4601x e There is tension on parallel bars before the closing of GCB switches e Some GCUs indicate on the PMCB network the status of GCB not open Moreover to use CBE function it is necessary to configure a digital input with DIF 2707 function Closing enabling before of excitement CBE function will be enabled only when the input is active Moreover it s necessary to configure a digital output through DOF 2201 function Alternator electric discharge control If no output is configured in this way CBE function will be disabled NB the output will be always idle except during the first phase of the fast parallel In fact the working output discharges excitement from alternator CBE function is configured with the following parameters e P 0259 time limit for starting and P 0260 minimum speed for starting These two parameters are used to exclude from CBE function the generators that aren t immediately started GCUs of these generators will open GCB switch and will go on with the usual parallel sequence through synchronization Generators that don t reach the minimum rotation speed indicated in P 0260 within P 0259 seconds from the starting request will b
42. of system the generator can deliver both stand alone and in parallel with mains It is very similar to system MSB MSTP The differences with reference to it are e This system is not an emergency system then the request for automatic triggering of the generator is not linked to the status of the mains e The uninterrupted parallel with mains P 0880 gt 0 should be allowed As the stand alone supply is allowed it is preferable but not mandatory to select MCB as interface switch P 0900 2 Please refer to the paragraph 3 for all regulations that rules parallel with mains Synchronization for GCB Available Synchronization for MCB Available externally Parallel functions PMCB communication bus Required Active power distribution Available Distribution of reactive power Available Protections for the parallel with mains Available Power modulation in parallel with mains in BASE LOAD Available mode Power modulation in parallel with mains in Available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Available Transfer to the generators function Not available DROOP mode Available Further restrictions for the closing of GCB Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no starting inhibition has been activated NOTE the load management see 8 6 can activate the inhibition to starting
43. one configured with P 0883 when the analogue input is at its maximum value 100 By setting P 0882 to a value higher than P 0883 a reverse scaling will be achieved when the measure acquired by the analogue input increases the active power setpoint decreases o Suggested Configure the desired analogue input with AIF 2301 function In this way the conversion of the value acquired by the analogue input in the active power setpoint is performed through a conversion curve see technical manual e GC400x o Configure the desired analogue input with AIF 2301 function In this way the conversion of the value acquired by the analogue input in the active power setpoint is performed through a conversion curve see technical manual Parallel functions manual 103 SICES Empowering your control e GC500x o Obsolete It is necessary to select an analogue input through P 0881 parameter any value other than 0 and 7 In this case there is no need to configure anything in the parameters related to the selected analogue input and P 0882 and P 0883 parameters are used for scaling the analogue input See description above for DST4602x o Suggested Setting the value 7 in P 0881 parameter In this case it is necessary to configure the analogue input with the desired AIF 2301 function See description above for DST4602x It is also possible but not mandatory to use a GCU digital input to decide whether to acquire the setpoint
44. step 17 17 Engine stop 22 Parallel functions manual SICES Empowering your control 2 4 4 SPtM Single Parallel to Mains Single parallel system to mains See notes in 2 4 that applies to this system too This is a production system in parallel with mains only GCU starts the generator when parallel is allowed by the status of the mains see 3 2 1 it disconnects the generator when protections for parallel with mains are activated see 3 it stops the generator when the status of the mains doesn t authorize parallel consecutively for P 0899 seconds The stand alone supply is not allowed therefore if some protections for parallel with mains are activated in any case GCU open the switch GCB regardless the interface switch should be selected with the P 0900 parameter see 3 3 Anyway it s better to select GCB as interface switch P 0900 1 to avoid useless openings of the switch MCB Parallel with mains should be continuative so P 0880 parameter should be set to a value different from zero otherwise GCU activates A273 shutdown incoherent parameters and P 0890 parameter maximum duration of parallel with mains should be set to zero The function transfer to generators is not available since stand alone supply is not allowed Closing with synchronization of GCB switch P 0854 should be possible otherwise GCU activates A273 inconsistent parameters shutdown Please refer to the paragrap
45. the GCB is opened the procedure goes on from step 3 If GCB is the interface switch P 0900 1 and the protections of parallel with mains have been activated and the generator is in parallel with mains GCB should be opened within 0 5 seconds otherwise GCU activates A275 shutdown interface switch not open and the procedure goes on from step 11 In the other cases GCU utilizes the normal time out for the switch If GCB is not opened e GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 11 e DST4602x and GC400x triggers W024 early warning GCB not open In case of shutdowns deactivations or discharges the engine should be stopped and therefore the procedure will go on from step 11 In the other 42 Parallel functions manual SICES Empowering your control cases if GCU is configured to keep the generator running in case of failure to open GCB P 0243 1 the procedure comes back to step e 8 if the generator is in parallel with mains e 7 if the generator is in parallel with other generators that are not coming out of parallel e 5 in the other cases If instead P 0243 0 the process goes on from step 11 11 Engine stop 2 5 4 MPtM Multiple Parallel to Mains Mains parallel multiple system See notes in 2 5 that applies to this system too This is a production system in parallel with mains only GCU starts the generator when parallel is allowed by the st
46. the power factor setpoint On GCU display the parameter can be set as either inductive value between 0 70i and 1 00i or as a capacitive value between 0 90c and 1 00c However by setting this parameter or P 0892 and P 0893 parameters described below from the serial port it is necessary to consider the following convention e The values lower than or equal to 1 identify an inductive power factor the value 0 85 means 0 85 inductive e Values higher than 1 indentify a capacitive power factor The value to be set is 2 00 minus the desired setpoint to select a setpoint of 0 95 capacitive it is necessary to set 1 05 2 00 0 95 All GCUs allow the modification of this parameter directly on the display page that shows the single line diagram of the system As an alternative to this parameter it is possible to use an analogue input to acquire the setpoint In this case the setpoint cannot be modified from GCU panel P 0894 is ignored any more but it will still be displayed e DST4602x o Obsolete Configure the desired analogue input with AIF 2400 function In this way the conversion of the value acquired by the analogue input in the power factor setpoint is performed with P 0892 and P 0893 parameters The no load voltage for the DROOP will be set up in P 0892 when the analogue input is at its minimum value 0 it will be configured with P 0893 when the analogue input is at its maximum 100 By setting P 0892 to a value higher
47. the protections for the parallel with mains have been activated and GCB switch is the interface device P 0900 1 the procedure goes on from step 10 If the protections for the parallel with mains have been activated and GCB switch is the backup device P 0900 2 if MCB and MGCB have not been opened within 0 5 seconds GCU activates A275 shutdown interface switch not open and the sequence goes on from step 10 If the generator should to be stopped due to serious problems shutdowns or deactivations the procedure goes on from step 10 If the generator should be stopped because discharges or if an inhibition to power load have been activated the procedure goes on from step 9 If you the automatic triggering of the generator is no longer required the procedure goes on from step 9 9 GCB closed power discharge The power of the generator is reduced to 0 kW with a rhythm that can be configured with P 0874 parameter or P 0875 if there are discharges This phase lasts until the power of the generator becomes lower than P 0878 threshold or after the time limit configured with P 0879 Then the procedure goes on from step 10 If in the meantime shutdowns or disconnections have been triggered the procedure goes on directly from step 10 If GCU realizes that it is no longer in parallel with other generators or that all the generators are coming out of parallel the procedure goes on from step 10 10 Opening of GCB three attempts if
48. the system reduce further the value of pr 4 4 2 Simplified method To overcome the difficulties of measuring the period of oscillation it is possible to go on referring to what said in the previous paragraph from step 6 included excluding points 3 and 5 Instead of step 5 increase decrease I after arranging P at step 4 to achieve the optimal performance 4 4 3 General remarks P factor is not able by itself to perform a good regulation To reduce the error P should be increased but after a threshold the system becomes instable Usually the P value set using the explained method is the better compromise between performance and stability To get a good adjustment it is necessary to set I factor Even small values of the parameter I increase the performance of the system Value obtained used the explained method usually give the better performance However it is not critical and can be set in a wide range of values Remember that the factor I accumulates adjustment errors delays in the recovery of the error can cause over elongations over shoots or under elongations under shoots Moreover too high value of I lead to system instability Once the value that gives a good performance is found try to decrease it until the performance drops below the expected minimum Then select the actual value in that range as compromise In some cases could be necessary to start the procedure with a minimum I value to all
49. this case GCU ensures that the fault had a minimum duration equal to triggering time 1 possibly by adding a slight delay in the intervention of the protection This to comply with German specifications do not disconnect the generator from the mains for any fault on the mains lasting less than 150 ms e Triggering threshold 3 The protection is triggered if the lowest of mains voltages falls below this threshold but not below threshold 2 and remains below the applicable reset threshold constantly for the triggering time In this case triggering time is dynamically calculated with a linear interpolation between the triggering time 2 and triggering time 3 parameters If the lowest of mains voltages is higher than the triggering threshold 3 the protection won t be activated 58 Parallel functions manual SICES Empowering your control The protection is restored when the lowest of mains voltage is above the reset threshold 3 continuously for reset time 3 2 8 27 Q gt amp U lt protection Minimum voltage amp directional reactive 3 2 8 1 Overview This protection is available for DST4602x and GC400x This protection is required by the German standards to allow the connection of electrical power production systems to medium voltage mains The standard indicates that these systems should support mains voltage in the event of mains failures without being disconnected from the mains itself but by inject
50. this case there is no need to configure anything in the parameters related to the selected analogue input and P 0886 and P 0887 parameters are used for scaling the analogue input See description above for DST4602x Suggested Setting the value 7 in P 0885 parameter In this case it is necessary to configure the analogue input with the desired AIF 2303 function see description above for DST4602x e Use GCU fourth amperometric transformer to measure active power of a phase of the mains To do this it is necessary that GCU mains bars sensor is used for the measurement of the mains P 0126 1 Moreover it is necessary to perform the following configurations o P 0130 2 indicates that the fourth amperometric transformer is connected to L1 phase of mains o P 0131 4 indicates that the power measurement acquired by the fourth amperometric transformer is used to calculate active power on phase L1 of mains GCU then calculates the power on phase L1 of mains and for three phase systems multiplies it by 3 therefore assuming that users are evenly distributed over the three phases If it is not the case it is possible set a correction factor by using P 0132 parameter through this factor it is possible to increase if gt 1 or decrease if lt 1 the value calculated by GCU to make it as close as possible to actual measure e Power measurement on the interchange point with mains can be performed by a MCU in this case the measurement is t
51. this control if for a minute it does not receive messages on the serial Parallel functions manual 7 SICES Empowering your control port By writing the value 21 with the same procedure GCU comes back to AUTO Note the command can be disabled by configuring a digital input with the function DIF 2706 if that input is not enabled e Through a SMS message see 9 e Using GCU keys o DST4602x press START and ACK keys simultaneously to switch to TEST press them again to go back to AUTO o GC500x and GC400x press START key to switch to TEST press it again to go back to AUTO 2 3 2 Forcing the intervention in REMOTE START mode When the REMOTE START mode is active GCU always controls the starting of the generator the function of inhibition of starting the generator does not work in this mode it also controls the closing of GCB switch unless the function of inhibition to power load has been activated It is possible to activate the REMOTE START mode in several ways e By configuring a digital input with DIF 2032 DST4602x and GC400 or DIF 0027 functions for GC500x When this input is active GCU switches to REMOTE START mode after the delay associated with the configured input e Through the controls of serial ports see Modbus registers o Holding register 20 By writing the value 18 into the register GCU switches to REMOTE START By writing the value 19 into the same register GCU comes back
52. this input should be active There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresis see 3 2 2 2 There are no parameters to configure reset delay The delay is 700 ms on DST4602x and GC400x 0 ms on GC500x Note when the protection is triggered the output configured with the AND OR logics ST 055 status can be activated with a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 lt is preferable to use those outputs to control the opening of the switches 3 2 11 2 Description of operations See diagram 3 2 3 1 See the common notes in 3 2 4 Parallel functions manual 63 SICES Empowering your control The protection is triggered when mains frequency is below the triggering threshold consecutively for the triggering delay The protection is reset when the mains frequency is above the reset threshold consecutively for the reset delay 3 2 12 81 f lt protection Minimum frequency This protection is available only for DST4602x and GC400x 3 2 12 1 Configuration Valid values GC400x GC400x GC400x GC400x functions DOF 0103 AND OR logic with status ST 061 triggered protection The protection can be disabled by setting the triggering delay to 0 0 There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresis see 3 2 2 2 There are no p
53. to assure in a certain moment which generators in that supplying moment can support a certain number of kW in addition to those they are already supplying in view of the connection of a big load of known power In practice if the operator is already informed about the necessity to connect a load of 500 kW to generators the same will activate this function in advance by demanding a power reserve for example of 600 kW will wait until the system indicates that the generators are ready to support further 600 kW then will connect the load After having connected the load the operator can disable this function Of course this new function will start stop generators so to assure that the supplying generators can support a further power equal to the one of the selected by the operator The power reserve works together with the load function according to the following logic A generator is started when at least one of the two functions requires its starting So if the generators are working at a percentage power higher than the one set in P 0826 or if the power that generators can further supply Sum of rated values minus the sum of supplied active powers is lower than the needed reserve A generator is stopped if both functions control the stop So if generators excluding the less priority one are functioning at a percentage power lower than the one set in P 0828 and if the power that generators can further supply
54. to configure the reset threshold 62 Parallel functions manual Empowering your control There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresis see 3 2 2 1 There are no parameters to configure reset delay The delay is 700 ms Note when the protection is triggered the output configured with the AND OR logics ST 060 status can be activated with a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 lt is preferable to use those outputs to control the opening of the switches 3 2 10 2 Description of operations See diagram 3 2 3 2 See the common notes in 3 2 4 The protection is triggered when at least one mains voltage is above the triggering threshold consecutively for the triggering delay The protection is restored when all mains voltages are below reset threshold consecutively for the reset delay 3 2 11 81 f lt lt protection Minimum frequency 3 2 11 1 Configuration Valid values P 0922 Triggering threshold P 0105 80 00 100 00 P 0923 Triggering delay Ss 0 00 60 00 EVT 1093 Triggered protection EVT 1153 Protection reset rasa and and GC400x functions thresholds GC400x functions DOF 0103 AND OR logic with status ST 055 triggered protection The protection is enabled if e The triggering delay is different from 0 e lf there is a digital input configured with DIF 2708 function
55. trineo eran 82 DIAO cun tl acts 17 30 35 96 DO IN 82 A Fe 5 EE EE A E aD 7 DOF 2213 voeccccccccccccccccccseceeceesettetsccceecseceececeseeees 82 DIF 2032 cccccccccesesesesseesecsssessesecsesseseseessececeeeeees 8 DOF 2221 ooccccccccccccccccccseceeeeessetetscecuecccceceeeesecees 80 DIF 2092 ccccccseeeseesssessssseeseseseescesceeeseeseeeeeees 105 DOI 80 vi Parallel functions manual SICES Empowering 3 DOF 2228 triada 80 wes ere ee eee DOR SOS circ epeestccenaesnr a 94 ee Us e EN DOF 3084 cccccccccnnnnnnnnannnnncnnnnnnnnnnononononnnnnnnnnnnnnos 99 BOM dS PEPA eo o An 93 DOF 3085 ccccccccccnnnnnnananonnnnnnnnnnnnnnnnnnnnnnnnnnnnnos 67 68 OI cos 82 89 92 100 101 103 105 106 DOF 3086 o EAEE 67 68 A 93 94 95 107 DOP 30ST sisaicnisnniesnedsaiasaesndssanesdneavatenntgonsdsadasaextes 55 A A on 94 DOF 3091 E E 93 POTS AAA A an 107 DOF 3092 cssssssessssssseeeeeeeeeeeseeesssessseeeasssssseeess 93 POTS stazeeenct ceadseutataecet a aiioa 107 DOF SOD a ds 93 A 107 DOF OA a 93 POTO AP eo e non 112 DOF Dd 101 Uriel 43 DOF BOI se 103 A eee eee eee 13 15 16 18 20 23 24 DOF AOO a 124 125 P 0222 6 7 11 15 20 27 33 39 42 45 49 52 DOF is 124 P 0243 11 12 15 16 20 22 24 27 29 33 38 BO cy Eo PPP on oa 124 40 41 45 47 49 50 51 119 FOS ceca races E ibas 124 125 E nen 115 118 DORM oaco I T 125 ay 024 E 0 A PP 115 E ay 0 26 A PPP nn 116 Bay 0 24 E e ee ee T ne ee 116 A PP eae A 61 PU
56. two three phase SAP ee ase i a e 92 5 4 8 Display page for SYNCNONIZATION cccceececeeeceeeeeeeeseeeceuecseeeseeesueeaeeesaees 93 5 5 Supply in parallel with other generatorsS ooooooncccconnccccnncccncnnnconconacincnnnncnnnnanennnos 93 5 5 1 Frequency adjuStMeMT occoocnccccnccncnccncnconcncnnnncnnnncnnrncnncnnnnrnnnnrnnnnrnconrncnnrncnnens 94 0 2 OMA SACU SING AN nro 96 5 959 LOGIN PASO Sins eccat 97 5 5 4 Unloading o Sate cence ects etecrtctenitsenatudtanneancieaeuneedemmiandeans sattamiecattecmetetiaewasediead 98 5 5 5 Use of an external load distributOr ooccccocnconcnccncncconncnncncnncnconenonnnncnnens 98 530 IF FOCUCTION MO aranlen WH IMIS eran etass 100 5 6 1 Power factor ACjUStMENt cccceeccceeeeceseeceeeeseeeeseeeeseueeseueesaueeseueeseeeenees 100 56 2 AENVO POWER CONTO seis pr EEEE EREE EEEE E 102 5 6 3 Automatic reduction of power due to anomalies ON MAINS ccceeee ees 107 6 Neutral earthing remote control SWitCh occoncconnconocccnnconcconacenannonnnonarenanrnanrnnanns 111 6 1 Simplified management occccocnccccnccncnccncnccncnnoncnnnnnnnonnnconnnnnnrnnnnnncnnrnonnrnconenennnos 111 6 2 GOMPICIS management scsi 111 6 2 1 A single remote control switch on parallel bars oooccconncconicocnconnnns 112 6 2 2 One remote control switch for each generator oocccoccccoccnccccnconcncnacnnnanonnns 112 T Closing before excitation CBE cssscce
57. value P 0888 e P 0881 4 System BASE LOAD Only for DST4602x and GC400x the power setpoint for the plant is the parameter P 0858 or a value acquired by the analogue inputs Each GCU by knowing the nominal power of all gensets calculates the related active power in percentage GCU controls the output of the generator to bring it to calculated value If GCU realizes that it is no longer in parallel with mains the procedure goes on from step 7 If the protections for the parallel with the grid have been triggered whatever the interface switch is P 0900 the procedure goes on from step 7 If the generator should to be stopped due to serious problems shutdowns or deactivations the procedure goes on from step 7 If the generator should be stopped because discharges or if an inhibition to power load have been activated the procedure goes on from step 6 If you the automatic triggering of the generator is no longer required the procedure goes on from step 6 6 GCB closed power discharge The power of the generator is reduced to 0 kW with a rhythm that can be configured with P 0874 parameter or P 0875 if there are discharges This phase lasts until the power of the generator becomes lower than P 0878 threshold or after the time limit configured with P 0879 Then the procedure goes on from step 7 If in the meantime shutdowns or disconnections have been triggered the procedure goes on directly from step 7 If GCU realizes th
58. value acquired by the analogue input in the setpoint for the power factor is carried out by means of a conversion curve see technical manual The analogue signal must be connected to the GCU with lower address in fact this one converts the signal in a setpoint for the power factor and sends it to the other GCU Anyhow it is possible and suggested to connect the analogue signal to all the controllers in this way if the controller with the lower address is broken the following one takes its place and the system continues to work The setpoint acquired is displayed on all GCU on the page that shows the electrical diagram of the plant 9 6 2 5 Transfer to generators mode The purpose of this mode is to gradually transfer the power absorbed by the load from mains to generators and then open MCB switch thus leaving the load entirely supplied by generators To fully use this functionality the underlying mode the one that would be selected if the input forcing the transfer to the generators wouldn t be active should be IMPORT EXPORT In this way GCU makes sure that the power on the interchange point with mains is the one determined with the related setpoint then it opens MCB switch the power setpoint on the interchange point with mains should be zero to avoid load transients on the generator as far as possible If the power measurement on mains is not available it is not possible to use IMPORT EXPORT mode So the underlying mode
59. very low value for example 10 of rated power The generator cannot provide so low powers for a long time because it will be damaged It is therefore possible to set a power threshold and a delay to stop the engine under this condition e P 0968 threshold to stop the engine due to excessive limitation of active power setpoint e P 0969 delay to stop the engine due to excessive limitation of active power setpoint s The function is disabled by setting one or both the previous parameters to zero and thus the engine will never be arrested by this function The engine is stopped only if it is supplying in parallel to mains and if the power setpoint is below P 0968 threshold due to one of the limitations described above consecutively for P 0969 time The engine will be restarted when the power setpoints is no longer be limited to a value below P 0968 threshold When the engine is stopped due to this function an event is recorded in the archive EVT 1131 and a description appears on the bottom line of the display as well as on the status page S 01 When the engine is restarted because the power setpoint is no longer limited an event will be recorded in the archives EVT 1132 Note power setpoint limitations are active even if DST4602x does not measure mains frequency and voltage During the parallel with mains in fact generator voltage and frequency are equal to those of mains and then DST4602x is able to apply the limitations on th
60. voltage should be between 85 and 110 of rated voltage In short GCU allows parallel with mains if mains frequency is between the thresholds set in P 0905 and P 0906 and if voltages are between the thresholds set in P 0909 and P 0910 The previous conditions shall continue consecutively for the time set in parameter P 0903 Warning if the enerator is already running in parallel to mains it is not disconnected from the mains based on these thresholds but only if the protections for the parallel with the mains have been triggered The verification of frequency is performed with a 0 01 Hz hysteresis on the thresholds Assuming to operate with a rated frequency of 50 Hz and with the parameters configured for the Italian legislation GCU will use the following ranges 0 00 Hz z AA E A band low frequency 49 94 Hz 49 95 0 01 B band hysteresis Parallel functions manual 49 SICES Empowering your control 49 96 Hz 49 95 0 01 C band correct frequency 50 04 Hz 50 05 0 01 z D band hysteresis 50 06 Hz 50 05 0 01 E band high frequency XXX To allow parallel with the mains therefore the frequency should be included at least one time in C range between 49 96 and 50 04 Hz and never get out from ranges B C and D As soon as it no more included in these ranges the time count configured in P 0903 restarts from zero The verification of voltages is performed with a hysteresis configurable with P
61. will be BASE LOAD or BASE LOAD alternative setpoint GCU makes sure that the generator supplies the power selected with the related setpoints then opens 106 Parallel functions manual SICES Empowering your control MCB switch the power setpoint should be set at a value as much as possible very close to the one of the load to avoid load transients on the generator If the digital input requiring transfer to generators mode deactivates GCU shall put the generator in parallel with mains 9 6 3 Automatic reduction of power due to anomalies on mains The recent European standards governing the parallel with mains require that in the event of non serious malfunctions on mains the generator is not disconnected to it but rather it should help in maintaining mains frequency and voltage at acceptable values For now only for DST4602x is able to act on DST4602x active power setpoint by limiting it as required by standards to avoid disconnecting the generator from mains The rest of the chapter is concerning for now only DST4602x When power limitation has been activated DST4602 displays a message on the bottom line of the display In addition the power setpoint on M 01 page flashes to indicate that a limitation is active NOTE the limitation in principle should be applied to the power exported to mains It coincides with the one supplied by the generator for pure production systems The two powers might be different if ther
62. 00Mains provides the same two PWM outputs of GC500 see previous point lt also provides two voltage outputs 10V or 0 20V that can be used as an alternative to PWM outputs GC400x provides two outputs in voltage 10V DANOUT All GCUs support the DANOUT expansion module that provides four analogue outputs The outputs can be configured by using micro switches as 0 10mA 0 20mA 0 5V and 0 10V See GCU technical manuals for the connection to analogue outputs To use an analogue output for the rom regulator control it is necessary to O Obsolete Use AOF 1000 function to configure the output In this case it is possible to use three parameters to adapt the value of the output to the internal speed reference P 0831 parameter allows specifying if the rom control increases engine speed when the input control increases it value O for P 0831 or if the engine speed decreases when the input control increases it value 1 for P 0831 for example for the GAC regulators P 0856 and P 0857 parameters can be used to set limit values minimum and maximum respectively that the analogue output can take P 0856 value should be lower than P 0857 value The internal speed reference will be scaled linearly between the values set in P 0856 and P 0857 P 0831 0 if the internal reference is 0 minimum speed the analogue output will take P 0856 value if the internal reference is 100 maximum speed the analogue output will ta
63. 0816 DST4602x connected to load function see 8 6 1 e P 0820 GC400x connected to load function see 8 6 1 e P 0822 P 0826 connected to load function see 8 6 1 e P 0828 connected to load function see 8 6 1 e P 0858 P 0860 DST4602x and GC400x e P 1201 P 1207 DST4602x and GC400x connected to load reserve see 8 6 2 e P 1604 P 1654 GC400x In case it is necessary to modify these parameters through the serial ports always act on ESU device 8 4 Authorizations for the closing of GCB As to parallel systems among generators not parallel with mains it s fundamental to assure that two generators never close their own GCB switch at the same time without synchronization because for sure they wouldn t be synchronized between them Let s suppose that two or more generators that are started simultaneously by means of a contact there is the possibility even if it is remote that two of them take the same time to start and therefore they control the closing of the Switch GCB simultaneously that will take place without synchronization because up to that moment there hasn t been voltage on the parallel bars Through PMCB network SICES Srl s devices prevent this situation ESU device authorizes a single GCU at a time to close without synchronization of GCB switch This function is automatic it cannot be disabled and doesn t need any configuration This function is extremely safe if the number of GCUs conn
64. 0911 parameter See next paragraph for notes on the management of hysteresis Assuming to operate with a rated voltage of 400Vac and with the parameters configured for the Italian legislation GCU will use the following ranges 0 00 Vac z A band low voltage 340 Vac z B band hysteresis 348 Vac 340 8 C band correct voltage 432 Vac 440 8 D band hysteresis 440 Vac E band high voltage XXX To allow parallel with the mains therefore voltages should be included at least one time in C range included between 348 e 432 Vac and never get out from ranges B C and D As soon as it is no more included in these ranges the time count configured in P 0903 restarts from zero DST4602x and GC400x provides DOF 3037 function Consent to parallel with mains for the configuration of digital outputs GCU activates this output when mains voltage and frequency are within the thresholds described above for the time configured in P 0903 3 2 2 Management of hysteresis GCU uses the hysteresis on all thresholds For some thresholds the hysteresis is configurable for other thresholds it is fixed 3 2 2 1 Hysteresis on voltage thresholds Valid values P 0911 Hysteresis on the voltages for the oe IN 0 1 10 0 protections of parallel with mains P 0908 15 Applies hysteresis for voltage thresholds DST4602x and GC400x The two parameters are used for the following protections e 27 U lt lt e 27 U lt
65. 10 cy Ae 94 DIF 0036 cccccccccseseesessseseeseesssessceseseeeeeeseesecens 35 DOF 0040 c cccccccccccecccseeeeeeecetenccecececccceeeeeseeeees 59 DIF 0038 cccccccceeeeeseesessessesesesecseeseeeeeeeeeeeeees 105 DOF 0049 cooooonnnnnnnncccccnonononononnononnnnnnnnnnnccnnnonnnnnns 81 DIF 0039 cccccceceeeeeessesesesessesseseeeeseeseees 9 34 53 DOF 0050 eee 80 DIF 0040 ccccccccceeseseesseeessesscseecseseeeeeseseeeeeeeeees 7 010 lo ee 80 DIF 0050 ccccccceseeeeseseseeeeseseesseceeeeeeeeees 9 34 94 DOF 0052 cononnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnss 80 DIF 0052 cccccccceeeeessseseseseeseseeeeeees 17 30 35 96 DOF 0053 ee 82 DIF 0058 cccccccceeeeeesssesesecesessssesseseeseeeeeeeeeeeens 102 DO 00 oy ee 82 DIF 0056 ccccccceeeeeesesesssssescsesessesseeeeseeeeseeeees 102 i 0 0 olor 82 DIF 0058 o n 87 90 99 103 105 106 DOF 0103 6 60 61 62 64 67 69 70 71 72 73 DIF 0060 cccccccccecccccccccccesecccasseeeeeesecees 9 34 53 74 75 76 93 94 99 101 103 DIF 0061 cccccceeeeseeeesssssesssesesesseeseeseseeeees 89 91 Dl S10 oh coconnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnononnnnnnnnnnnnnnss 112 DIF 0062 cccccccecseeessessssssesssssesseeseceeseeeeeeeeees 121 BLO x10 A 42 DIF 0070 iii iaa 42 DOF 2092 ee 42 DEDO tt cE tato caoba 105 DOF 2201 oecccccccccccccceccsceeeeeesetcctscecccceececeeeeeeees 115 A 18 26 31 36 94 DOF 2211 ur
66. 100 to the maximum voltage It should be necessary to guarantee a dynamic of 10 out of the nominal voltage by managing the voltage regulator and or on the minimum and maximum values that the analogue output can take see 4 1 Parallel functions manual 717 SICES Empowering your control P 0867 parameter can be varied directly from GCU panel even with the generator running All GCUs provide a display page the one linked to the synchronization see the user s manual that enables the modification of this parameter without getting into programming As an alternative to P 0867 parameter it is possible to use an analogue input to perform the fine tuning normally connected to a potentiometer on the front panel If an analogue input is used P 0867 parameter is no longer used and it is not therefore possible to vary the frequency from GCU panel In any case on the display page devoted to synchronization GCU shows the fine tuning value acquired by the analogue input The analogue input should be configured as follows e DST4602x o Obsolete Using AIF 2200 function In this case P 0865 and P 0866 parameters are used for scaling the analogue input When the input takes the value configured in P 0865 the fine tuning is set to 0 When the analogue input takes the value configured in P 0866 the fine tuning is set to 100 It is possible to set P 0865 to a value greater than P 0866 therefore getting a reverse adjustm
67. 2 8 6 1 3 8 6 2 8 6 3 8 6 4 8 7 ii Parallel functions manual Empowering your control SUMMARY 1 A 1 LA FRE GUIS OWS OG Sreocioniaci n adsadadanedanadodadodedadodatedaisdiad 1 1 2 Symbols and remarkS ooccconcnccncnccncnccncnconcncnncnnnncnonnrnnnnrnnnnrnonnrnnnnrncnnrncnnrnnonenennens 1 LS DEMOS ac 1 or AROMA aran anar poa ea 1 10 2 ACTONYMS sanacion raras 2 EA A E e Ie e en 4 2 ss S ae E EE E E E E EEE 5 2 ee o 6 2 2 Inhibition to starting of the generator oocccocnccnnccocnnocnconccnncnnnnncnnncnncnnnnncnanonnrnnnnos 7 2 3 Forcing of intervention of the generator cccceccsececeeeceeeeseeeceeeeeeeeseeesueeseeenaes 7 2 3 1 Forcing of intervention in TEST mode ooccccoccnccnccnccncnnccncnnonncnnonncnnnnncnononcnnnnos 7 2 3 2 Forcing the intervention in REMOTE START mode cccceeceeeeeeeeeeenees 8 2 4 Systems consisting of a single generator c coccccocnccccnccncnccnnnccnnnnonononnnnnonnnonanononens 8 24 1 ES Es AA 9 24 2 SOB SINGIS Stand BV siii 12 2 4 3 SSB SSTP Single Stand By Single Short Time Parallel 15 2 4 4 SPIM Single Parallel to Mains ooccconcncocnnccccnccncncnncnconnncnncncnncncnnnnnnnons 23 2 4 5 SPtM SSB Single Parallel to Mains Single Stand By 27 2 5 Systems consisting of more than one generatOF cooocncccocnccccnccncnccncnccnnnnnnnnnnnanoss 31 2 5 1 MPM Multiple
68. 2x will keep anyway the generator in action therefore avoiding the dragging e tis possible to use P 0805 parameter o If P 0805 0 all the other GCUs open their own GCB switch by avoiding in this way to drag the generator that has the failure on the switch default value heartily advised o If P 0805 1 the closing of GCB switches isn t allowed but neither the opening of the already closed GCB switches is forced o If P 0805 2 no action The opening of GCB switches isn t forced and neither closing is forbidden 8 6 Load Management 8 6 1 Load Function This term indicates the capability of the system to automatically start stop generators so to have enough power with a good margin but not in excess to supply users So this function has a meaning only when generators aren t connected in parallel with mains Only for DST4602x starting from version 00 48 and on GC400x this function allows to control the devices that work in parallel with the mains in SYSTEM BASE LOAD or with devices that work in DROOP GCU use the following logic to decide the management of the load on the gensets e lf on Can Bus PMCEB there are controllers that do not support the SYSTEM BASE LOAD mode the load function is carried out only by isochronous gensets e If on Can Bus PMCB all controllers support the SYSTEM BASE LOAD mode the load function is not only carried out by isochronous gensets except the fo
69. 3 25 30 44 46 48 51 FOS OU ROO A 109 104 105 PODO a A Er ro A 110 P 08B A 21 28 46 49 105 So 110 POO OZ ee a O 105 POOO ee UUO A 110 FO OC OU A E I 105 P 0960 eceso i i A 111 POG 64 vavincvnicenesttereveciirexgantazenene 21 28 46 49 105 FOO IL PO oe ERO 6 ONU0 UA 111 P ODDS curt ccnararaset tia sous sanecsitieeiadaheorinatsdevinctiaerered 107 P OOT Ns teeta tate aetna sactisarnante A 89 P OGOGO aranera a EE 106 107 SP AEE 89 PP Ea A 106 107 POST seta ea ntnaniadacana bone EAEI 89 FOGG A tora ncteteratmationatede 21 28 46 49 106 O o EE 89 A A A 100 101 PLUS Dinasierneiacdo daran E lala data datelcie uno 89 P0890 oe ec eececcececeeceeeeceseeeeseeeeenees 17 25 44 48 P0976 0 ec ecccceccececceceecececeececeececaececueaeceeaeeneeaeeaees 90 PGS Vissreeiasercdatererniscerabestatsaaieetpsaiaditenatgindahateass 104 POST seta sieetuaniadadsna beta E Ei 90 POSE roca 103 104 A AG EE E A E AEA 90 POSO P ortds cial 103 104 POS E cetreria 91 POSO iaa oids cia 103 104 A senan E 91 SA 103 PUSO a E E acid 91 PO ecards edil 103 A rer E EE 91 A a 103 POIS recia 91 e O SS AENUONUOUON0 0 Q INAS 25 48 78 P O98089 A o nO 92 o E E 92 viii Parallel functions manual SICES Empowering me yr SO eee eee tener eee eee ee ee eee 92 o A ee ee ee ee BO AP 92 Ao o eee a A A 81 S BD AP EEEE L O ET E E 81 OLS ego EE L OET E ETT 81 SA e E E E E E A EE 94 Aa 81 STOT A ES Eo 67 68 A A 82 AAA E E 60
70. 37 parameter any value other than 0 and 7 In this case there is no need to configure anything in the parameters related to the selected analogue input and P 0838 and P 0839 parameters are used for scaling the analogue input See description above for DST4602x o Suggested Setting the value 7 in P 0837 parameter In this case it is necessary to configure the analogue input with the desired AIF 2101 function see description above for DST4602x It is also possible but not mandatory to use a GCU digital input to decide whether to acquire the value for the fine tuning of the frequency from the analogue input or whether to use P 0840 parameter Configure the input with DIF 2711 function e If the input is active the value for the fine tuning of the frequency is acquired by the analogue input e Ifthe input is not active the value for the fine tuning of the frequency is P 0840 parameter If the system is composed of several generators the procedure for the fine tuning of speed should be performed on all generators to obtain the same rotation speed or the same frequency If this is not performed then there will be problems in the active power distribution phase except for GC400x as in 5 5 NOTE if there is a potentiometer for the fine tuning of speed it should not be used to request more or less active power when the generator is in parallel with the mains or with another generator Fine tuning of voltage
71. 400x not GC500x can use a digital output to report that it is in parallel to another generator Configure the output with DOF 3095 function On all GCUs however it is possible to configure a digital output with DOF 0103 function AND OR logics with ST 103 status the output is activated when the generator is in parallel with other generators 5 5 5 Use of an external load distributor It is possible to use an external load distributor to manage the distribution of active power but not of reactive power with generators operated by non SICES Srl devices The analogue control of this device should be connected to an analogue input of GCU GCU will transmit the speed variations required by the external load distributor to the rom regulator To use an external load distributor it is necessary to e DST4602x o Obsolete Configure the desired analogue input with AIF 2108 function In this way the scaling of the value acquired by the analogue input is performed with P 0819 and P 0820 parameters When the analogue input takes the value configured in P 0819 GCU controls the minimum speed for the engine 0 When it takes the value configured in P 0820 GCU controls the maximum speed for the engine 100 It is possible to set P 0819 to a value higher than P 0820 thus obtaining an Inverse regulation when the value acquired by the analogue input increases the speed control for the engine decreases o Suggested Configure the desired an
72. 62 A A 21 28 39 45 49 97 AA 70 POOS an a E E cea tuneneednaens 23 97 O A IA 70 P 0854 10 13 17 18 21 25 26 31 36 94 POD A ubatenkyenaeneurine 56 57 P 0855 10 13 17 18 23 25 30 34 95 96 O22 OMR GO SI A 71 A 80 81 POD IE E SON viateeins 71 A viniiuwenauiecediniiiavncicaia inne 80 81 A A A biatains 73 A A 81 82 PUE raid arica ein Diada ida 73 POSO E ascos la rta crac bad 81 82 POZO sica E 72 PUSO O aatatuntacteoanane dale rada burns aaebana 81 82 A 72 PUSO Anibal dale rada bra 86 87 POS O ntc iaacia daban 74 PUSO Dunia mado urraca elena 86 PU atunero iaa daba 74 PUSO Donna ada mado circa aradad edad 86 POIS Lantana baaa baaa 75 POO Cariobuaaidcasa cidad rado reo slcata ira cadain 86 POSE datosde iuadacaicda bend 75 A Grader E enacted 82 97 POIS E E E civil 75 POSO vienna densa decetivt cn ainceaciseaniedinintlawtateewedinmenanicineds 82 97 FO A arial ratdeudaneseindeaas 76 77 A A OA 99 103 POT died ceci 76 PUSO alias edad cada 99 103 PUDO E 108 POB VA ocococcnconincnncnnoninannons 22 28 39 46 50 101 PIO A ri diets De secceeint eed nan netted denia 108 P 08 5 ccdaventimsitenteinanawensntennnn 22 28 39 46 50 101 FS ardid 108 OG DO rica aia cs 103 A E 111 A tide ttuneshvid aiesentausadns 100 101 FS AREA UPON 111 P 0878 19 22 27 28 32 37 39 46 50 101 FOS O PUN OO E A 109 P 0879 19 22 27 28 32 37 39 46 50 101 FOF AA P PA O 00 OI 109 P 0880 17 20 21 22 2
73. 975 Hz 3 2 2 3 Hysteresis on power thresholds The hysteresis for the threshold on positive sequence current li or I used for 27 Q gt amp U lt protection is set at 5 0 the reset threshold for this protection is therefore 95 of the intervention threshold 3 2 2 4 Hysteresis on reactive power thresholds The hysteresis for reactive power positive sequence Q1 or Q threshold used for 27 Q gt amp U lt protection is set at 5 0 the reset threshold for this protection is therefore 95 of the intervention threshold 52 Parallel functions manual Empowering your control 3 2 3 Operational diagrams 3 2 3 1 Operational diagram for low voltage frequency thresholds The diagram is applied to the protections e 27 U lt lt e 27 U lt DST4602x and GC400x e 81 f lt lt e 81 f lt DST4602x and GC400x Voltage or frequency Reset threshold Triggering threshold Triggering timer s Triggering delay Reset timer s Reset delay Triggering of protection Triggering Reset event 3 2 3 2 Operational diagram for high voltage high frequency thresholds The diagram is applied to the protections e 59 U gt gt e 59 U gt DST4602x and GC400x e 81 P gt e 81 f gt DST4602x and GC400x Parallel functions manual 53 SICES Empowering your control Voltage or frequency Reset threshold Triggering threshold Triggering timer
74. AIF 2302 function In this way the conversion of the value acquired by the analogue input in the power measurement on the mains is performed with P 0886 and P 0887 parameters kW The measurement will be the one configured in P 0886 when the analogue input is at its minimum value 0 it will be configured with P 0887 when the analogue input is at its maximum value 100 NOTE power measurement on the mains should be managed with its sign negative if exported consequently one of the two parameters should be set to a negative value Suggested Configure the desired analogue input with AIF 2303 function In this way the conversion of the value acquired by the analogue input in power measurement on the mains is performed through a conversion curve see technical manual NOTE power measurement on the mains should be managed with its sign negative if exported consequently one point of the curve should be negative o GC400x Configure the desired analogue input with AIF 2303 function In this way the conversion of the value acquired by the analogue input in power measurement on the mains is performed through a conversion curve see technical manual NOTE power measurement on the mains should be managed with its sign negative if exported consequently one point of the curve should be negative o GC500x Obsolete lt is necessary to select an analogue input through P 0885 parameter any value other than 0 and 7 In
75. C500x to configure the input that acquires the feedback Since the system allows parallel with mains it s mandatory to connect the feedback of MCB switch GCU uses it to e Correctly display the status of the switch e Determine the presence of voltage on the parallel bars to decide whether the closing of switches can be done via synchronization e Recognize the status of parallel with mains and activate the appropriate adjusting methods of the active and reactive power e It is possible to configure GCU P 0221 gt 0 in a way to make the generator intervene automatically also when mains is present if MCB isn t closed and therefore users aren t supplied e Since the system allows parallel with mains anomalies regarding failure to opening and failure to closing of MCB switch are always managed Sets a delay different from zero for the digital input that acquires the feedback this delay is used as the opening closing time limit of the switch otherwise a time limit of 2 seconds is used DST4602x and GC400x it is possible to use the P 0847 parameter to indicate to GCU that in the event of a mains failure MCB switch will open automatically In this way DSt4603 avoids activating early warning signals of failure to close MCB in the event of mains failure GCB command P 0854 parameter allows configuring the way GCU manages the switch e P 0854 0 GCB controlled by GCU synchronization not available e P 0854 1 GCB controlled
76. CU uses the two previous early warnings to make sure that there is always and only a generator with NECB remote control switch closed Finally GCU provides for P 0159 parameter to define the type of management for NECB remote control switch e 0 a remote control switch for each generator which provides the neutral earthing of the generator e 1 a single remote control switch for parallel bars which provides the neutral earthing of the bar Parallel functions manual 111 SICES Empowering your control 6 2 1 A single remote control switch on parallel bars This management mode provides for a single NECB remote control switch that connects the parallel bars neutral to the earth In this case e NECB remote control switch closing controls of individual GCUs should be connected in parallel so that the remote control switch closes as soon as a GCU controls its closing e If the feedback of NECB remote control switch recommended should be used it should be connected to all GCUs use separation diodes refer to GCU technical manual for the parallel connection of digital inputs For this management method as there is only a remote control switch GCUs should not have to decide which of them should control the closing of the remote control switch simply all GCUs with closed GCB order the closing of NECB remote control switch unless the parallel bar of the generators is not connected to mains In fact all GCUs with GCB close
77. Connection to rpm regulator GCU is able to connect to a rom regulator in four different ways e Via a Can Bus line State of the art electronic engines in fact allow reading information and sending controls to the electronic control unit that controls the engine ECU via a Can Bus connection All GCUs provide a CANO line just for this purpose In this case it is just required to o Select the model of the engine with P 0700 parameter in the list of supported engines o Setthe correct P 0703 parameter to enable GCU controls to the engine See the documents 10 11 for the description of supported engines Normally GCU internal speed reference 0 100 is translated into a 120 rom speed variation compared to the rated speed regime e Through an analogue output GCU devices provide for different types of analogue outputs 70 Parallel functions manual SICES Empowering your control DST4602x has two standard current analogue outputs mA insulated They can be configured by using micro switches as 0 20 mA 20mA or 10 mA By applying an appropriate resistance on the two output terminals they can be easily converted into voltage outputs GC500 has two series of PWM analogue outputs which cannot be directly used for a connection to a rom regulator SICES Srl upon request provides an external module to convert PWM signals into current signals which are identical to those described for DST4602 GC500Plus e GC5
78. ES Empowering your control e DOF 0103 AND OR logics with the statutes o ST 097 indicates that the synchronization for the closing of GCB is in progress o ST 098 indicates that the synchronization for the closing of MCB is in progress o ST 099 indicates that in this moment the two voltage three phase systems are synchronized only for DST4602x and GC400x Some of the previous output functions can be used to supply enable any external synchronizers 9 4 2 Presence of voltage on the parallel bars GCU should verify the presence of voltage on parallel bars or on users for systems consisting in a single generator to decide whether synchronization to close a switch is necessary or not GCU can get this information in two ways e By using its own mains bars sensor In this case P 0126 parameter should be set to 0 and bar voltages should be connected to GCU mains bars sensor GCU uses a fixed threshold corresponding to 33 of rated voltage with a hysteresis of 3 if mains voltages are above this threshold parallel bars are considered powered e tis possible to use a GCU digital input configured with the function DIF 3102 for DST4602x and GC400x DIF 0050 for GC500x Parallel bars are considered powered if this input is not active the input during running indicates the absence of tension from the bars GCU is capable of signalling the presence of voltage on parallel bars with a digital output configured with DOF 3031 fo
79. ES Srl devices It is not used for the parallel with mains As a rule therefore the GCU working in DROOP does not know it is in parallel with something else therefore it cannot manage the loading and unloading phase in the stages of entry into and exit from parallel If however GCU knows it is in parallel with something else for example if it is used in DROOP also in parallel with mains then it can manage loading and unloading phases P 0988 parameter is used to configure loading and unloading phases Hz s it indicates the maximum speed at which GCU modifies its internal frequency setpoint See notes in 5 3 3 5 3 3 Limits for DROOP This feature should only be used when the generator that works in DROOP is definitely working in parallel with mains It serves to protect the system from errors in the configuration of the DROOP curves Let s suppose for example that the operator has configured a curve for the frequency DROOP with a no load frequency of 50 Hz If this generator is put in parallel for example to a turbine which instead works at 50 5 Hz the generator tends to be dragged by the turbine because the DROOP requires 50 Hz without load at most and in the long run this causes the activation of reversal of energy protection The same applies in the case in which the configured curve goes for example from 54 to 50 Hz and the frequency of the turbine is 49 8 Hz in this case the activation of the maximum power protection is ve
80. Empowering your control 400 0 231 0 402 0 229 0 401 5 230 0 Parallel functions manual DS T4602 DST4602 P DST4602 vo ution DSTA4602 P4vo uzion GC500 GC500 s GC500 s GC400 GC400 2 s GC4004 Filename EAAMO46503EN Rev 03 Date 03 09 2015 ID Document EAAMO465 Product DST4602 GC500 GC400 SICES Empowering your control md e E E o o leran 4 ESO for 00 40 review DST4602 NES 2 4 3 2 4 4 2 5 3 2 5 4 6 6 1 6 2 ION IN 5 Controller names updated for the management of DST4602 DST4602 P DST4602 volution DST4602 PEvolution GC500 GC500Plus GC500Mans Updates for 00 50 review DST4602 3 1 3 2 5 3 1 5 7 1 5 7 1 1 5 7 1 2 5 7 2 5 7 2 1 5 7 2 2 5 7 2 4 8 6 1 8 6 1 1 8 6 2 8 6 3 8 6 4 8 7 1 8 7 2 03 09 2015 GC400 and GC400Li added 1 1 4 2 2 1 2 2 2 3 1 2 3 2 2 4 2 4 1 2 4 2 243 2 4 4 2 45 2 5 2 5 1 2 5 2 2 5 3 2 5 4 2 5 5 3 1 3 2 3 2 1 3 2 2 1 3 2 2 2 3 2 3 1 3 2 3 2 3 2 4 1 3 2 4 2 3 2 5 1 3 2 6 3 2 6 1 3 2 7 3 2 7 2 3 2 8 1 3 2 8 2 3 2 9 1 3 2 10 3 2 10 1 3 2 11 1 3 2 12 3 2 12 1 3 2 13 1 3 2 14 3 2 14 1 3 2 15 1 3 2 16 1 3 3 4 4 1 4 2 4 4 5 1 5 1 1 5 1 2 5 2 5 2 1 5 2 2 5 3 1 5 3 2 5 4 1 5 4 2 5 4 3 5 4 4 5 4 5 5 4 7 5 5 5 5 1 5 5 1 1 5 5 1 2 5 5 2 5 5 2 1 5 5 2 2 5 5 3 5 5 4 5 5 5 5 6 5 6 1 5 6 1 1 5 6 1 2 5 6 2 5 6 2 1 5 6 2 2 5 6 2 3 5 6 2 4 5 6 3 6 7 8 8 3 8 5 8 6 1 8 6 1 1 8 6 1
81. Evolution technical manual 5 SICES Srl EAASO394xxXA DST4602 DST4602 P DST4602 Evolution DST4602 P Evolution Modbus registers 6 SICES Srl EAAM0322xxXA GC500 GC500Plus GC500Mains parameter table 7 SICES Srl EAAM0304xxIT GC500 GC500Plus GC500Mains technical manual 8 SICES Srl EAAS0454xxXA GC500 GC500Plus GC500Mains Modbus registers 9 SICES Srl EAAS0341xxIT serial communication and SMS protocol 10 SICES Srl EAAS0117xxIT Can Bus communication with engines 11 SICES Srl EAAS0425xxIT Can Bus communication with engines 12 SICES Srl EAAMO504xxXA parameter table GC400 GC400 in 13 SICES Srl EAAM0456xxIT technical manual GC400 GC400 14 SICES Srl EAASO505xxXA Modbus registers GC400 GC400 irk 15 SICES Srl EAASO16412 Bus communication for the management of the power in parallel systems 4 Parallel functions manual SICES Empowering your control 2 Plant types P 0802 parameter is the first and most important parameter that should be configured in the GCU in order to establish operating logics of the system It indeed identifies the type of system through it GCU automatically enables or disables the required internal functions SICES Srl s GCUs manage ten different types of systems divided into two categories systems consisting of a single generator and systems composed of multiple generators Within each category the systems are further subdivided according to the conditions necessar
82. F 0060 for GC500x to configure the digital inout They are dedicated to the management of the mains for emergency service purpose When no protection for the parallel with mains is active the input should be activated mains ok Therefore GCU will allow the parallel with mains only if the input is active It will also open a switch called the interface switch to isolate the generator from the mains as soon as this input becomes inactive The change of the digital input is recorded in the records file Ne EVT 1098 Triggered protection EVT 1158 Protection reset EEE and GC400x Note in case of using an external sensor the internal sensor is ignored the possible mains status sent to the MC100 controller on Can Bus PMCB is ignored too See also the notes in 3 2 4 3 2 Use of the internal sensor GCU can use its mains bars sensor to acquire mains measurements It is first of all necessary to configure this sensor by using these parameters P 0126 Use of mains bars sensor Set to 1 P 0119 Number of phases T o ooo y O P 0105 Rated frequency Z 48 Parallel functions manual SICES Empowering your control P 0116 Rated voltage P 0117 Primary of voltammetric transformers P 0118 Secondary of voltammetric transformers P 0129 The neutral is connected DST4602x and GC400x See GCU technical manual for connections of mains lines After performing the connections and the confi
83. G o ninien iria 121 122 EVI iii 67 0G A oa 122 P A PA 122 O20 tits 118 120 121 122 123 00100 AA 6 7 8 AA 120 122 123 124 O Ae e 115 OOO estas 118 120 121 122 123 A eee cee eee 91 POSO E EE 120 122 123 124 P 0105 53 54 56 57 71 72 73 74 108 111 A E 121 Ae Amo 83 Us AA E ee eee 80 81 P 0116 53 54 55 56 61 62 63 67 69 70 PU tierna 95 Parallel functions manual vil SICES Empowering your control SA 35 97 P 0900 20 22 25 27 28 30 33 46 48 49 50 A C E 102 51 78 A E E 35 95 97 102 POOO A a e 60 A A 35 95 97 102 A NA E 106 ELO E E E E E E EIEE S 85 FOO ota tac a anresinisagoedabiasceninas 54 55 78 108 109 O cabana E EE E E EET AES 85 FO OS A A 107 FG Ce A E AS 85 SA RAAE 54 108 109 P OBAO Ao SA 85 86 POSO vesa pane coanewsncetaaceinevanatsetasadeniantons 54 108 109 FS We weeds EE E eie ewe ada AE EEY 97 P 0908 55 56 57 61 62 63 64 67 69 70 ELA ate dee E canteen A E E E E EE 97 P 0909 eaer na arare eara E EE 54 ELISA E S E E AA E E E EE 97 A E dae E EE EAA E E E E 54 A E a aE 98 FD A E A EE 54 55 56 A AE E E AEE 98 E a E 2 E E EE EA E EE EEE 61 FOO E E A EEN 94 96 POSTS a E EA E E E cnet acetate 61 PSA A Gacveciasauenain 13 18 26 31 SS E E A E 69 FOG A AS 97 PA cti E bos suda dh aaa aca dado aseos 69 PIO GSO AAA A 81 97 PATO martina A ended aseo 62 PASO s corea ira cruciales sameuneneausctas 81 97 PA 7 AA E betes seen dh aa aca dados
84. GCB with MCB closed three attempts If the switch opens the procedure goes on from step J If the protections for the parallel with mains have been triggered and the interface switch is GCB P 0900 1 if it is not opened within 0 5 seconds GCU activates A275 shutdown interface switch not open and goes on from step 8 Instead if protections for the parallel with mains have not been triggered GCU waits for the normal time out of the switch and in the event of failure to open 26 Parallel functions manual SICES Empowering your control e DST4602x and GC400x GCU triggers W024 early warning GCB not open If P 0243 parameter is set to 1 this early warning becomes a request for automatic intervention until the operator recognizes the early warning If there are shutdowns discharges and deactivations the procedure goes on from step 11 otherwise it goes on from step 5 e GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 11 8 Opening of MCB and GCB together three attempts This step of the procedure is executed only if the interface switch is MCB If it does not open within 0 5 seconds from the triggering of protection for the parallel with mains GCU activates A275 shutdown interface switch not open In any case GCU remains in this status until GCB opens If it opens the procedure goes on e From step 9 if MCB has been already opened e From step 3 is MCB is still closed
85. IS A Uan 82 Oo AP A E E 61 P OOO A A e 82 JS E E E 69 P O9 ae ne 82 JS 71 PO y CA Ae 118 123 124 SP A 73 A O PC Oo A ey A 123 124 SPP A 19 BO S COP A 123 SIDO oro 76 BU ace EP o 123 JS A 62 BU tat ea se oe ee ese lean 123 A E 70 BO oa asa wees eee E 123 JE o 72 A a 118 123 124 SIE O o E E o ea 74 Be WW o e 63 64 JA o QA 64 BU a area ae cee anaes E 63 A o 2 na 93 Be Mesa on PP eee E 63 JA na 93 A ae cece cae ed T 63 JA o AP E 93 a a 63 Jn 1010 AP Pe 101 A ee ee ee eee ee eee 63 JA A E A 101 e aa e PI 64 UO Az e 103 EN ao AA o ee ee eee A ee 64 SE i A 101 E AAA EE A E AT 67 SEO ee A 99 E a a PCI ON ME E EAT 67 68 la lOG craen eia aE 6 E on o e 67 Dla POS APA E E E 6 Peo E e 67 ig WUC Ae 6 o ooo eae geen ceecese ee ease 67 PPP T 67 Parallel functions manual IX SICES Empowering your control 1 Introduction This document is applicable to the following devices for the control of the generators produced by SICES Srl e DST4602 DST4602 P DST4602Evolution DST4602 PEvolution e GC500 GC500 s GC500Mains e GC400 GC400Mains GC400tin In the rest of the document the term GCU Generator Control Unit will be used to refer to all the boards while the names DST4602x to refer to DST4602 DST4602 P DST4602Evolution DST4602 PEvolution GC500x to refer to GC500 GC500 4s GC500 2 rs and GC400x to refer to GC400 GC400 2irs and GC500Lirk The specific name will be used in
86. P 0221 gt 0 in a way to make the generator intervene automatically also when mains is present if MCB isn t closed and therefore users aren t supplied e Only if a delay different from zero is set for the digital input that acquires the feedback this delay is utilized as opening closing time limit of the switch itself in this case GCU reports failures of the switch by activating some anomalies DST4602x and GC400x it is possible to use P 0847 parameter to indicate that in case of mains failure MCB switch will open automatically In this way DST4602x can avoid activating early warning signals of failure to close MCB in the event of mains failure GCB command P 0854 parameter allows configuring the way GCU manages the switch e P 0854 0 GCB controlled by GCU e P 0854 1 Incorrect value for this kind of system GCU will act as if it were set on 0 e DST4602x and GC400x P 0854 2 GCB controlled externally e DST4602x and GC400x P 0854 3 Incorrect value for this kind of system GCU will act as if it were set on 2 The GCB key of the panel can be used in MAN mode to open and close the switch if controlled by GCU 12 Parallel functions manual SICES Empowering your control Feedback GCB Use DIF 3001 DST4602x and GC400x or DIF 0007 functions for GC500x to configure the input that acquires the feedback It isn t indispensable to connect the feedback of GCB switch If it is connected GCU uses it for e Correct
87. RO O P AAEE T 116 AS eea eE a 69 E O S PA E E A 116 118 EV LOS Ae 71 PAUSA E A E E A A E err 92 A A 0c Ao P o 73 BT CPC POP OPE PU o ees te 7 EVI 8 che eee eee E ee doce 75 BN eS PEREDA OEP Poo ge 7 EV TOSO eee eee E E eee 76 P Ode Uara eer etre ere er oe 7 o 93 rn cere rere ere ee eee eee 7 lt A 99 AAPP o oy 7 EV Teh A atcavausen 62 AP o o 7 Th Aer 70 POA ZG rn o E 8 EVT 1102 OPA UA 72 AAPP O eee eeesecee E 8 Ee Tel 0 8 AAA RE 74 BO Po e 8 a WOE IRA capt onedatcaisavent ceqdesteaienseuetaaaetatcaeanoes 64 EDAD doradas 114 117 EVA id 67 BO PR on so teacedaeuet E 79 A a a AAA we 108 BO P E E A 79 ENTAIL arte A 108 OAS o A E E E A E OET 88 ENTAL ene E A ee 109 FO A E EAT A PE T 117 A S E 109 PO E e E EAT A E 5 EV a APA R 110 POOO innean E oe 117 118 A D i e e T cee ce oc A ace E 110 AP 118 E WM A 111 POGO A e 6 118 119 BN Ua i Oe ae se wee cee A 111 A ne 42 43 118 JIAP A 61 Qro ere eer ee E 100 EVA Wl rte cee senses E ee 69 Az Pee ee 100 EVO 71 A PP A 100 101 A D ars Seren enero eee ee ee eee eee meee 73 A ue nan 100 101 EVITA tado bs 75 log oe eee 118 121 122 123 EV TAITO O sheet ae yee rege ee ed ence 76 APP ee E 35 96 EVITA ted 93 A y e 35 96 EVI WOO susto ita 62 A O lt a 101 EVI IO ste eee 70 FOG Ao oo O A lt enw wn 101 EVE WA OS nietos 72 FO G2 A lt P een 120 IA O pN 74 P 0O22 sagcteaces seicsneqessene cbactsneats 118 120 122 123 Io A eer ee eee ee ET 64 PO
88. The analogue input must be configured using the function AIF 2211 In this case the conversion between the value acquired by the analogue input and the voltage set point is carried out through a conversion curve see user s manual Note the voltage set point acquired by an analogue input is not shared among all the GCU connected on the CanBus PMCB The parameters that configure the Pl regulator for the voltage regulation are P 0989 and P 0990 By setting them at zero the PI regulator is disabled See 4 for the configuration of these two parameters The voltage control even if it is disabled does not work with engine stopped or during the engine Start operations It starts working after P 1652 seconds since the genset voltage has overpassed the P 1651 percentage value with respect to the nominal one Additionally GCU follows the frequency set point variation with a ramp which is configurable using the P 1653 parameter 5 3 Supply in DROOP mode GCU controls the DROOP mode only with GCB closed Until GCB is open what said in 5 1 and Errore L origine riferimento non e stata trovata is valid The DROOP mode is available for both frequency and voltage 9 3 1 Droop for frequency Note If there is an active digital input configured with DIF 2095 function for DST4602x and GC400x or DIF 0058 for GC500x the DROOP mode is disabled and the rom regulator is controlled as shown in 5 1 The management in DROOP of the rom regul
89. Use of the internal synchronizer See 5 4 5 Use of an external synchronizer See note in the previous paragraph for synchronizers with UP DOWN controls GCU is able to manage the external synchronizers that provide an analogue control for the rom regulator This control should be connected to a GCU analogue input which will transmit the control 90 Parallel functions manual Empowering your control received from the external synchronizer to rom regulator during synchronization NOTE GCU allows the acquisition of an external signal during synchronization to control the rom regulator not to control the voltage regulator Configuration to use an external analogue synchronizer e DST4602x o Obsolete Configure the desired analogue input with AIF 2104 function In this way the scaling of the value acquired by the analogue input is performed with P 0817 and P 0818 parameters When the analogue input takes the value configured in P 0817 GCU controls the minimum speed for the engine 0 When it takes the value configured in P 0818 GCU controls the maximum speed for the engine 100 It is possible to set P 0817 to a value higher than P 0818 thus obtaining an inverse regulation when the value acquired by the analogue input increases the speed control for the engine decreases It is also possible to use AIF 2102 function if the external synchronizer is used both for GCB and MCB in this case see description in 5 4 2 o Sugg
90. ack to step 5 If the generator should to be stopped due to serious problems shutdowns or deactivations the procedure goes on from step 10 If the generator should be stopped because discharges or if an inhibition to power load have been activated the procedure goes on from step 9 If you the automatic triggering of the generator is no longer required the procedure goes on from step 9 Parallel functions manual 41 SICES Empowering your control 8 GCB closed in parallel with mains GCU should calculate the power setpoint for the generator e P 0880 0 Continuative parallel with mains is not allowed Power setpoint is 0 kW e P 0881 1 BASE LOAD The power setpoint is P 0884 parameter or a value acquired by the analogue inputs e P 0881 2 IMPORT EXPORT GCU calculates a power setpoint for the generator so that power exchanged with the mains reaches the required value P 0888 e P 0881 4 System BASE LOAD Only for DST4602x and GC400x the power setpoint for the plant is the parameter P 0858 or a value acquired by the analogue inputs Each GCU by knowing the nominal power of all gensets calculates the related active power in percentage GCU controls the output of the generator to bring it to calculated value If GCU you realizes that it is no longer in parallel with mains the procedure comes back to step 7 if the generator is in parallel with other generators otherwise it comes back to step 5 If
91. actor for all the gensets that compose the power plant Starting from the reference set by the operator the active power supplied is deducted by the gensets that are not working in SYSTEM BASE LOAD The setpoint that results is divided in percentage among all the gensets that work in SYSTEM BASE LOAD In this way the active power exported in the mains is always equal to the reference selected by the operator even if some gensets work in different modes Therefore this function can work with older GCU that don t support the SYSTEM BASE LOAD mode Note the logics for the management of the load see 8 6 can command the controllers that work in SYSTEM BASE LOAD mode the GCU can autonomously start stop the gensets in order to make the system produce the active power desired keeping the gensets at an acceptable power level stopping some of them if the power is too low or starting some of them if it s too high The reference for the power factor is unique for the entire plant and it is the same on all GCU that work in this mode It is possible to set this reference in two ways e By using the parameter P 0858 kW The parameter is automatically shared among all GCU It s possible to change this parameter by any GCU All GCU allow to change this parameter directly on the display that shows the electrical diagram of the plant e By using an analogue input configured with the function AIF 2307 The conversion of the
92. ad percentage of generators DPRt ADPt on MDPt ratio This percentage value calculated on the total of the generators should be maintained even at a single generator level in order to have a correct distribution of active power e Total load active power reactive power ratio LOADt RDPt on ADPt ratio This value calculated on the total of the generators should be maintained even at a single generator level in order to have a correct distribution of active power Additionally each GCU calculates e lis active power setpoint setpoint kW MDPs DPR e ts reactive power setpoint setpoint kvar LOADt ADPs GCU therefore uses some PI controllers to make sure that the generator supplies the required active and reactive power Parallel functions manual 93 SICES Empowering your control e P 0871 e P 0872 parameters configure Pl controller for active power acting on voltage regulator e P 0811 e P 0812 parameters configure Pl controller for reactive power acting on voltage regulator For the calibration of the above parameters see 4 3 9 9 1 Frequency adjustment When the generator is in parallel with other generators GCU normally acts on the rom regulator to try to make the generator supply the active power calculated as described above As a rule therefore it does not make any control on frequency It is however necessary to control the frequency otherwise albeit slowly it will tend to derive and dev
93. ains P 0908 16 Applies hysteresis for frequency on DST4602x and 0 1 thresholds GC400x The two parameters are used for the following protections e 81f lt lt e 81 f lt DST4602x and GC400x e 81 f gt gt e 81 f gt DST4602x and GC400x Parallel functions manual 51 Empowering your control P 0908 16 parameter is available only for DST4602x and GC400x GC500x behave as if this parameter were set to 0 GCU can use two different ways to manage frequency hysteresis e P 0908 16 0 In this mode P 0921 is managed as a percentage of rated frequency P 0105 This is the only mode available for GC500x Soglia di scatto P 0921 P 0105 100 Soglia di scatto P 0921 P 0105 100 Soglia di ripristino 81 Soglia di ripristino 81 gt Example for 81 lt protection P 0105 50 Hz P 0921 1 0 Configured threshold 95 0 Intervention threshold 47 50 Hz Reset threshold 48 00 Hz e P 0908 16 1 In this mode P 0921 is managed as a percentage of the threshold This mode is not available for GC500x Soglia di scatto Solia di score P 0821 p 0105 Soglia di ripristino 81 oglia di ripristino 81 lt lt 100 Soglia di scatto Soglia di score P 0921 p 0105 Soglia di ripristino 81 gt 100 Example for 81 lt protections P 0105 50 Hz P 0921 1 0 Configured threshold 95 0 Intervention threshold 47 500 Hz Reset threshold 47
94. alogue input with AIF 2109 function In this way the conversion of the value acquired by the analogue input in the speed control for the engine is performed through a conversion curve see technical manual e GC400x o Configure the desired analogue input with the function AIF 2109 In this way the conversion of the value acquired by the analogue input in the soeed command for the engine is carried out through a conversion curve see technical manual 98 Parallel functions manual SICES Empowering your control e GC500x lt is necessary to select an analogue input through P 0834 parameter any value other than 0 It is not necessary to configure anything in the parameters related to the selected analogue input but P 0835 and P 0836 parameters are uses for scaling the analogue input When the analogue input takes the value configured in P 0834 GCU controls the minimum speed for the engine 0 When it takes the value configured in P 0835 GCU controls the maximum speed for the engine 100 It is possible to set P 0835 to a value higher than P 0835 thus obtaining an inverse regulation when the value acquired by the analogue input increases the speed control for the engine decreases The external load sharing unit may be turned off disabled when the generator is not in parallel with other generators It is therefore necessary to use a digital input to enable the use of the signal from the external load sharing unit Us
95. alue If the request for transfer to generators is active DIF 2096 when the generator power has reached the calculated value the procedure goes on from step 8 If the continuative parallel with the mains is not allowed elapsed the time limit see above the procedure goes on from step 8 If the protections for the parallel with the mains have been triggered the procedure goes on from step 7 when the interface device is GCB P 0900 1 from step 8 when the interface device is MCB P 0900 2 If the generator should to be stopped due to serious problems shutdowns or deactivations the procedure goes on from step 7 If the generator should be stopped due to other reasons discharges or if automatic intervention is no longer required the procedure goes on from step 6 If an Inhibition to power load is active the procedure goes on from step 6 Power discharge The power of the generator is reduced to 0 KW with a rhythm that can be configured with P 0874 parameter or P 0875 if there are discharges This phase lasts until the power of the generator becomes lower than P 0878 threshold or after the time limit configured with P 0879 Then the procedure goes on from step 7 If the generator should to be stopped due to serious problems shutdowns or deactivations the procedure goes on from step 7 If the protections for the parallel with the mains have been triggered the procedure goes on from step 7 when the interface devic
96. alue configured in P 0835 GCU controls the minimum speed for the engine 0 When it takes the value configured in P 0836 GCU controls the maximum speed for the engine 100 It is possible to set P 0835 to a value higher than P 0836 thus obtaining an inverse regulation when the value acquired by the analogue input increases the speed control for the engine decreases o Suggested Configure the desired analogue input with AIF 2107 function or AIF 2103 function if the external synchronizer is used both for GCB and MCB In this way the conversion of the value acquired by the analogue input in the speed control for the engine is performed through a conversion curve see the technical manual e GC400x Configure the analogue input with the AIF 2107 function or with the AIF 2103 function if the external synchronizer is used both for GCB and MCB In this way the conversion of the value acquired by the analogue input to the engine speed command is carried out through a conversion curve see technical manual u e GC500x lt is necessary to select an analogue input through P 0832 parameter any value other than 0 In this case there is no need to configure anything in the parameters related Parallel functions manual SICES Empowering your control to the selected analogue input and P 0835 and P 0836 parameters are used for scaling the analogue input See description above for DST4602x It is possible to configure a digi
97. arameters to configure reset delay The delay is 700 ms Note when the protection is triggered the output configured with the AND OR logics ST 061 status can be activated with a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 lt is preferable to use those outputs to control the opening of the switches 3 2 12 2 Description of operations See diagram 3 2 3 1 See the common notes in 3 2 4 The protection is triggered when mains frequency is below the triggering threshold consecutively for the triggering delay The protection is reset when the mains frequency is above the reset threshold consecutively for the reset delay 3 2 13 81 f gt gt Maximum frequency 3 2 13 1 Configuration Valid values P 0924 Triggering threshold P 0105 100 0 120 0 0 00 60 00 P 0925 Triggering delay 64 Parallel functions manual SICES Empowering your control EVT 1094 Triggered protection EVT 1154 Protection reset DST4602x and GC400x functions Activates restrictive thresholds GC400x Digital Output Description functions DOF 0103 AND OR logic with status ST 056 triggered protection The protection is enabled if e The triggering delay is different from 0 e lf there is a digital input configured with DIF 2708 function this input should be active There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresi
98. arantee that the frequency is the one required with the fine tuning command By default GC400x works in the same way too Anyhow it is possible to enable the control of the frequency see 5 2 with the parameters e P 1600 0 it enables the frequency control when GCB is open e P 1600 1 it enables the frequency control when the GCB is closed and the genset works in isochronous and it is not in parallel with neither mains nor other gensets GCU provides P 0840 parameter for the fine tuning of frequency It is a percentage value the value of 50 should correspond to the rated speed of the engine the value of 0 should correspond to the minimum speed and the value of 100 to the maximum speed On electronic engines the variation of control between 0 and 100 causes a variation of 240 rpm 8 Hz around the rated speed 120 rpm 4 Hz On engines with conventional rom regulators it should be necessary to guarantee a similar dynamic by acting on the same rpm regulator and or on the minimum and maximum values that the analogue output can take see 4 1 P 0840 parameter can be varied directly from GCU panel even with the generator running All GCUs provide for a display page the one linked to the synchronization see the operating manual that enables the modification of this parameter without getting into programming As an alternative to P 0840 parameter it is possible to use an analogue input to perform the fine tun
99. ars This term identifies a device to control a BTB switch BTB Control Unit for example BTB100 Identifies the function Closing Before Excitation quick parallel see paragraph 7 Identifies a function to configure digital inputs Digital Input Function The number that follows the wording DIF represents the code that should be set in the parameter that configures the function of the desired digital input Identifies a function for the configuration of digital outputs Digital Output Function The number that follows the wording DOF is the code that should be set in the parameter that configures the function of the desired digital output Indicates the active power supplied by all generators in parallel it s the ratio between ADPt and MDPt values 2 Parallel functions manual SICES Empowering your control DPRtn Indicates the active power that generators in parallel would supply in case one of them the one with less priority came out from parallel EVT Identifies an event stored within the historical records The number that follows the wording EVT is the event numeric code ESU This term identifies a SICES Srl s device it canbe a GCU or a MCU that has special duties within the PMCB communication network See 8 1 GCB This term identifies the switch that connects the generator to users or to the parallel bars for systems with more than one generator Generator Cir
100. at is calculated on the basis of this parameter Avoid changing this value after setting the coefficients for Pl controller it may be necessary to repeat the calibration of these regulators 4 4 Pl regulators GCU internally uses several Pl regulators in order to determine the voltage and speed references needed in every instant to manage the generator during prior and subsequent stages to parallel with mains or with other generators With GC400x it is possible to enable the PI regulators even if the genset does not work in parallel with the mains or with other gensets All internal Pl regulators are configured with two parameters e The factor proportional to current error P also called gain e The factor related to the integral in error time I also called integrative factor In the following chapters the parameters associated with each PI regulator will be indicated These two parameters for each PI regulator should be calibrated on the field during the commissioning of the generator In fact they depend on several factors type of engine alternator power type of alternator different parameters for similar systems may also be required However setting these parameter is not very critical if carried out following a correct procedure Unfortunately the empirical setting up method called Ziegler Nichols requires measuring the period of oscillation of controlled condition frequency voltage active power reactive power measure
101. at it is no longer in parallel with mains or if the protections for the parallel with mains have been triggered the procedure goes on from step 7 7 Opening of GCB three attempts if the GCB is opened the procedure goes on from step 3 If GCB is the interface switch P 0900 1 and the protections for the parallel with mains have been triggered and the generator is in parallel with mains GCB should be opened within 0 5 seconds otherwise GCU activates A275 shutdown interface switch not open and the procedure goes on from step 8 In the other cases GCU utilizes the normal time out for the switch If GCB is not opened e GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 8 e DST4602x and GC400x triggers W024 early warning GCB not open In case of shutdowns deactivations or discharges the engine should be stopped and therefore the procedure will go on from step 8 In the other cases if GCU is configured to keep the generator running in case of failure to open GCB P 0243 1 the procedure comes back to step 5 If instead P 0243 0 the process goes on from step 8 8 Engine stop 2 5 5 MPtM MSB Multiple Parallel to Mains Multiple Stand By Mains parallel multiple system with possibility to operate stand alone as well See notes in 2 5 that applies to this system too Parallel functions manual 45 SICES Empowering your control In this type
102. ated value Do not configure any output with this function if the voltage regulator does not provide for its own input If you UP DOWN controls are used appropriately configure the following parameters o P 0996 parameter in this parameter it is necessary to set the theoretical time s that the regulator needs to bring the alternator from minimum to maximum voltage o P 0997 parameter in this parameter it is necessary to set the time s for pulses there will be only one pulse every P 0997 seconds o P 0998 parameter in this parameter it is necessary to set the minimum duration of the pulse It is a percentage of the time set in P 0997 o P 0999 parameter in this parameter it is necessary to set the minimum duration of the pulse It is a percentage of the time set in P 0997 GCU will generate a single UP or DOWN pulse each P 0997 seconds the output will be activated for a time included between P 0998 and P 0999 of P 0997 based on the voltage reactive power error P 0996 parameter is used internally to GCU for its management logics it is not necessary for it to be fully precise Normally it is possible to measure it by bringing the alternator to minimum voltage forcing a fixed DOWN control then by forcing a fixed UP control the time the alternator takes to reach full voltage is measured If you do not use the digital output to force the alternator to rated voltage GCU should check the voltage also when the gener
103. atest after P 0879 seconds GCU will control the opening of the GCB If the key is held down for more than a second GCU opens GCB switch immediately e While the generator is not in parallel with mains or other generators GCU opens GCB switch immediately In case of failure to open activates W024 early warning 2 5 1 MPM Multiple Prime Mover Multiple stand alone production system See notes in 2 5 that applies to this system too This type of system provides for the only stand alone production They are the classic generators for building sites where the operator decides when the generators should supply and when not Parallel with mains is not allowed Synchronization for GCB Available Synchronization for MCB Not available Parallel functions 34 Parallel functions manual SICES Power modulation in parallel with mains in BASE Not available LOAD mode Power modulation in parallel with mains in Not available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Not available Transfer to the generators function Not available DROOP mode Available Further restrictions for the closing of GCB Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no starting inhibition has been activated NOTE the load management see 8 6 can activate the inhibition to starting for the generators which sho
104. ator consists in requiring the same rpm regulator a speed frequency depending on the currently supplied active power according to a curve indeed called DROOP curve It is actually a straight line The next picture shows an example 80 Parallel functions manual SICES Empowering your control 52 e 0 100 kW In the previous example the curve provides a no load frequency of 52 Hz and a full load frequency of 48 Hz The DROOP adjustment is used to put two generators in parallel and get a breakdown of active power without plugging in any way the control devices of the two generators between them It should only be used to put in parallel a generator run by a GCU SICES Srl device with another generator not managed by non SICES Srl devices It makes little sense to use the DROOP adjustment for a generator that supplies in parallel to mains as the frequency is imposed by the mains that generator would provide a fixed power as indicated by the DROOP curve in the example of the previous figure if mains frequency is 50 Hz the generator would always supply 50 of its rated power The distribution of active power in DROOP works only if the DROOP curve is identical on all generators As the generators which supply in DROOP are not connected to each other in any way the idea is to use the only information in common among them frequency as index of the power to be supplied Let s take an example with only two generators assumin
105. ator is not in parallel with anything Remember in these cases to correctly set P 0868 and P 0869 parameters for PI voltage controller to allow proper voltage regulation GCU converts internal voltage reference in a 10 variation of rated voltage Parallel functions manual 73 SICES Empowering your control 4 3 Nominal power For all parallel functions the correct setting of nominal values for active power and apparent power of the generator is essential GCU provides the following parameters e P 0125 kW Here the rated power of the engine should be set This parameter is used for engine protections but is also used by parallel logics for the management of active power in fact they always work on percentage active power that is calculated on the basis of this parameter Avoid changing this value after setting the coefficients for Pl controller it may be necessary to repeat the calibration of these regulators e P 0106 kVA Here it is necessary to set the rated power of the alternator kVA which is usually higher than the rated power of the engine because the alternator should be able to provide also a part of reactive power This parameter is used for the protections of the alternator From the two previous parameters GCU draws rated reactive power Q y P 01062 P 0125 The value Qn is used by some of parallel logics for the management of reactive power in fact they always work on percentage reactive power th
106. atus of the mains see 3 2 1 it disconnects the generator when protections for parallel with mains are activated see 3 it stops the generator when the status of the mains doesn t authorize parallel consecutively for P 0899 seconds The stand alone supply is not allowed therefore if some protections for parallel with mains are activated in any case GCU open the switch GCB regardless the interface switch should be selected with the P 0900 parameter see 3 It is preferable to select GCB as interface switch P 0900 1 Parallel with mains should be continuative so P 0880 parameter should be set to a value different from zero otherwise GCU activates A273 shutdown incoherent parameters and P 0890 parameter maximum duration of parallel with mains should be set to zero Please refer to the paragraph 3 for all regulations that rules parallel with mains Synchronization for GCB Available Synchronization for MCB Not available stand alone supply not possible PMCB communication bus Active power distribution Not available Parallel functions Distribution of reactive power Not available Protections for the parallel with mains Available Power modulation in parallel with mains in BASE Available LOAD mode Power modulation in parallel with mains in Available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Available Transfer to the generators function Not available DROOP
107. be used in MAN to open and close the switch if controlled by GCU Feedback MCB Use DIF 3002 DST4602x and GC400x or DIF 0006 functions for GC500x to configure the input that acquires the feedback Since the system allows the parallel with mains it is essential to connect the feedback of MCB switch GCU uses it to e Correctly display the status of the switch e Determine the presence of voltage on the parallel bars to decide whether the closing of switches can be done via synchronization e Recognize the status of parallel with mains and activate the appropriate adjusting methods of the active and reactive power e Since the system allows parallel with mains the anomalies of failure to open and to close MCB are always managed Sets a delay different from zero for the digital input that acquires the feedback this delay is used as the opening closing time limit of the switch otherwise a time limit of 2 seconds is used DST4602x and GC400x It is possible to use P 0847 parameter to indicate to GCU that in the event of mains failure MCB switch will open automatically In this way GCU avoids activating failure to close MCB early warnings of in the event of mains failure GCB command P 0854 parameter allows configuring how GCU manages GCB switch e P 0854 0 GCB controlled by GCU synchronization not available e P 0854 1 GCB controlled by GCU synchronization available e DST4602x and GC400x P 0854 2 GCB controlled e
108. case of need to refer to the specific model of the controller GCUs manage the parallel of the generator with other generators and or with the mains or anyway with devices similar to electric mains turbines etc The aim of this document is to describe all the functions that GCU provides for the management of the installations of parallel systems it also describes how these functions can be configured through the programming parameters of GCU Make however reference to GCU technical and operational manuals for everything not described in this manual 1 1 Required knowledge For proper use of this document it is required knowledge in using and commissioning gen sets for parallel application It is also required the knowledge of basic control functions which are explained in GCU operation manuals Further explanations can be found in the technical manuals All these documents programming parameter tables as well should be considered an integral part of this manual 1 2 Symbols and remarks In this document a vertical bar on the right margin or a gray background indicates that the chapter or the paragraph has been amended respect to the previous document s version Adjustments in tables fields are highlighted with a gray background 1 3 Definitions 1 3 1 Anomalies GCU is able to report and manage all the anomalous conditions occurring during the working of the system The anomalies are classified into four categories according t
109. cccccccccseccssececeececeececeececeueeseueeseuceseueeseueesaueeseueessneesaees 75 5 Supply mode AA A o o rr rrrrrr errr mnnn nnmnnn 76 5 1 Fine tuning eeccipecarteascnanseenaccnaetane lt titactnactanaxanatienaanaueacuncnunegeeucchaatennchaaanuackiguneuateanus 76 Sil FINE TUNING OTE qUe isa ada 76 NA oa O o o AAAAP P E 77 5 2 Supply in non parallel MOE occccoccnccocnnccocnnocononocnanononanononanoconannnnonnnonunenoss 78 Oicel FREUT UO Miaccectcactegstcndececteedsanatancecechanceantancecaetandeasateaeteentendecectandecd 79 5 2 2 Voltage regulation occooocccocccccncocnococnnooncnnnonncnnnnnonanonnrnnnnnnnnronnrnnnnncnarennrnnnans 79 S9 SUPE DROOFR MI unn 80 Sel WOOO TO SOME ICY smart aaa 80 9932 VOage DIR UIOP sita oiei iE EE EESE E EEEE EEEE 84 SS CMEC O DROOP 22 eee eee 86 SA OVAC ONZA O iia 87 5 4 1 Digital Output FUNCTIONS cccoocccccccnncccnnnononnnononononanononannnnnnnnnonnnnnnnncnnnnnnncnonens 87 5 4 2 Presence of voltage on the parallel bars ooooccconccconccconcnconcnconcnnnnnnnonos 88 5 4 3 Synchronization for GOB cccooccccccccnccoccnonocnnonocononacnnonncnnonnnnnonnnnonnncnnnonenenanens 88 944A Synchronization TOP MOB ios 90 5 4 5 Use of the internal synchronizer c oocccoccnccccnconcncnncnccncncnncnonnnncnnnncnncncnnnncnnens 91 5 4 6 Use of internal synchro check ooccconcncoccnccccnconcncnncncnncncnncnonnnnonncnnnncnonnnnnnnens 92 5 4 7 Compensation of known phase shifts between the
110. cedure goes on from step 4 4 Closing of GCB three attempts in case of failure to close D014 deactivation GCB not closed will be activated and the procedure will go on from step 7 5 GCB closed In case of shutdowns discharges or deactivations the procedure goes on from step 6 If there are requests for inhibition to power load or if the automatic intervention of the generator is no more required the procedure will go on from step 6 6 Opening of GCB three attempts if the GCB is opened the procedure goes on from step 3 If GCB is not opened e GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 7 e DST4602x and GC400x triggers W024 early warning GCB not open In case of shutdowns deactivations or discharges the engine should be stopped and therefore the procedure will go on from step 7 In the other cases if GCU is configured to keep the generator in action in case of failure to opening of GCB switch P 0243 1 the procedure will come back to step 5 otherwise will go on from step 7 7 Engine stop Parallel functions manual 11 SICES Empowering your control 2 4 2 SSB Single Stand By Single emergency system See notes in 2 4 that applies to this system too This kind of system provides only a generator that carries out emergency service to power mains GCU provides to start the generator if the mains is out of tolerance from the
111. ch controller to check which plants are managed by the device Note the following description for the SSB plant is valid also for other SICES devices that do not manage the parallel function 2 1 Inhibition to taking of load In automatic mode once the generator has been started GCU normally always tries to close GCB switch There are some exceptions e SPtM or MPtM systems production in parallel with mains only if mains voltages and frequency do not authorize the parallel see3 2 1 GCU prevents GCB switch from closing and opening if it is closed If within an appropriate time the mains does not come back within tolerance GCU stops the engine e Systems composed of multiple generators when in parallel with another generator that fails to open its GCB and P 0805 parameter was set to zero GCU opens GCB switch e GCU in TEST mode if P 0222 parameter is set to zero GCU opens GCB switch In all other cases GCU tries to close GCB switch it is possible to force its opening by using the inhibition to power load This internal function once activated has priority over any other function GCB switch will be opened and it won t be possible to close it Where provided GCU will also close mains switch MCB The function operates in AUTO TEST and REMOTE START modes The activation of this function does not require the activation of anomalies on GCU and does not cause the stopping of the engine When this input is active
112. ch is called MGCB here a different acronym is used to highlight that GCU is able to manage it with very limited logics which do not provide synchronization and parallel with mains e MTS Mains Transfer Switch It is the switch connecting the load users to mains Elsewhere in the manual this switch is called MCB here a different acronym is used to highlight that GCU is able to manage it with very limited logics which do not provide synchronization and parallel with mains To control these switches the digital outputs of GCU are used e GTS use DOF 2091 function for DST4602x and GC400x or DOF 0031 function for GC500x GCU activates the output to close GTS switch e MTS use DOF 2092 function for DST4602x and GC400x or DOF 0032 function for GC500x GCU activates the output to open MTS switch inverted logic The function is activated if there is at least an output configured to control GTS The output associated with MTS is optional For the actual control of GTS it is necessary to wire GTS controls of individual GCUs in parallel so that the switch is closed if at least one GCU orders the closing For the actual control of MTS MTS controls of individual GCUs should be wired in parallel NOTE GCU activates the output to control the opening of MTS connecting them in parallel it is enough that a single GCU controls the opening to open the switch The function has the aim to connect users to generators only when the rated p
113. cing generators with higher priority before The list is made in the following way Parallel functions manual 119 SICES Empowering your control e Generators that cannot supply when they aren t in automatic mode or have shutdowns discharges or active deactivations or have the inhibition to starting activated etc aren t inserted in the list because they cannot be started automatically e Generators that are already supplying and that have the load function disabled aren t inserted in the list because they cannot be stopped automatically NB the load function is disabled for GCUs in TEST or REMOTE START mode e The generator selected as master most priority is inserted in the first position of the list The parameter P 0823 always includes the address PMCB of the generator currently selected as master e Generators available and with the load function enabled that have addresses higher than the master generator are inserted in the following positions of the list e Generators available and with the load function enabled that have addresses lower than the master generator are inserted in the following positions of the list in increasing order Let s give a practical example Let s suppose to have 10 generators with addresses from 1 to 10 assigned to them Generators with address 3 and address 5 are stopped GCU in OFF RESET The GCU of the generator 8 is in REMOTE START mode The master generator curr
114. configured frequency and voltage measurements are performed anyway MCB command GCU does not handle MCB switch P 0855 parameter should be configured as 2 Controlled externally but is not mandatory GCU behaves as if it were configured in this way MCB key or the combination SHIFT GCB for some versions of GC500 GC500Ps and GC400x is not used Feedback MCB Any feedback is ignored GCB command P 0854 parameter allows configuring the way GCU manages the switch e P 0854 0 GCB controlled by GCU Parallel functions manual 9 SICES Empowering your control e P 0854 1 Incorrect value for this kind of system GCU will act as if it were set on 0 e DST4602 and GC400x P 0854 2 GCB controlled externally e DST4602 and GC400x P 0854 3 Incorrect value for this kind of system GCU will act as if it were set on 2 GCB key on the panel can be used in MAN to open and close the switch if the switch is controlled by GCU Feedback GCB Use DIF 3001 DST4602x and GC400x or DIF 0007 functions for GC500x to configure the input that acquires the feedback It is not essential to acquire the feedback of GCB switch If it is acquired GCU uses it to e Correctly display the status of the switch e Only if a delay different from zero is set for the digital input that acquires the feedback this delay is used as maximum opening closing time of the same switch with the aim to activate anomalies to report the failure
115. configured time Unlike MSB system however GCU allows the parallel with mains Usually the parallel with mains is temporary P 0880 0 it is used to avoid a blackout on users during the switching of users from generator to mains when mains comes back or from mains to generator in case of forced intervention in TEST or REMOTE START mode The maximum duration Parallel functions manual 39 SICES Empowering your control of the parallel is 1 second to use a longer time but anyway limited set the needed time in P 0890 parameter and set P 0880 to a value different from zero Elapsed this time if the external logic has not opened MCB or MGCB GCU opens its own GCB This kind of system also allows the continuative parallel with mains if P 0880 is different from zero Usually this function is used to test the loaded engine TEST without anyway disconnecting users from mains In this case there isn t a limit to the duration of the parallel Please refer to the paragraph 3 for all regulations that rules parallel with mains Parallel functions Function Aaa ey PMCB communication bus Protections for the parallel with mains Available Power modulation in parallel with mains in BASE Available LOAD mode Power modulation in parallel with mains in Available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Available Transfer to the generators function Not available DROOP mode Available
116. could note empirically that CBE function works well also leaving P 0264 on zero above all if the engines involved in parallel are equal among them Parallel functions manual 115 SICES Empowering your control 8 PMCB communication digital bus The GCUs produced by SICES SRL but MCU and BTBCU too communicate among them by using a Can Bus line called PMCB Power Management Communication Bus This bus is not always needed for systems composed of a single generator it isn t used Therefore GCU supplies the parameter P 0800 to enable disable this Can Bus line Possible values are e 0 PMCB disabled e 1 PMCB enabled e 2 PMCB enabled in extended mode In this mode GCU also transmits information not strictly required to management but useful for external supervisory systems You should use this mode only if needed because it increases the data traffic on PMCB network If PMCB isn t used it should be disabled in order to avoid that GCU triggers early warnings to show possible errors on the Can Bus line If PMCB is enabled every GCU connected to mains indicates the BUS OFF status of the line Can Bus non working status by triggering W200 early warning Since BTBCU has two PMCB channels can alternatively trigger WO62early warning All GCUs connected to PMCB network are identified by an address addresses should be univocal lf a GCU identifies another GCU with its same address it will indicate this fact by
117. ction should not intervene for any size of voltage drops even at 0 Vac if the failure lasts less than 150 ms e The protection should intervene in 150 ms if at least one mains voltage drops below 70 of rated voltage e The intervention delay should be calculated dynamically by following the red line between 700 ms and 1500 ms if the lowest of mains voltages has a value included between 70 and 90 of rated voltage e The protection should not intervene if all mains voltages are above 90 of rated voltage Actually there are addendums to the standard that consider the special needs of generators the standard indicates that in this case the system can be immediately disconnected from the mains if at least one mains voltage drops below 30 of rated one This condition can be met by using 27 U lt lt protection along with it 3 2 7 2 Configuration Parameter Valid values GC400x GC400x GC400x GC400x P 1214 DST4602x and 0 0 100 0 GC400x GC400x P 1216 DST4602x and 0 0 100 0 GC400x GC400x P 1218 DST4602x and 0 0 3200 0 GC400x EVT 1104 Triggered protection DST4602x and GC400x Parallel functions manual 57 SICES Empowering your control EVT 1164 Protection reset DST4602x and GC400x functions and GC400x functions AND OR logic with status ST 063 triggered protection and GC400x The protection is enabled if e Parameter P 1211 is set to 1 to disable it set it to 0 e lf there is a
118. cuit Breaker GCU Indicates a device to control a generator Generator Control Unit for example DST4602 GTS Refer MGCB LOADt Indicates the ratio between the values of RDPt and ADPt It identifies the system total power load MCB This term identifies the switch that connects mains to users or to parallel bars if a switch MGCB doesn t exist Mains Circuit Breaker MCU Indicates a device to control the mains Mains Control Unit for example MC100 MDPs Indicates the maximum active power kW that can be supplied by a single generator MDPt Indicates the maximum active power kW that can be supplied by all generators in parallel It is the sum of the related MDPs MDPtn Indicates the maximum active power kW that can be supplied by all generators in parallel except for the less priority one It is the sum of the related MDPs MGCB Indicates the switch that connects the parallel bars of the generator to users Master Generators Circuit Breaker MPM See the description of types of systems par 2 MPtM See the description of types of systems par 2 MPtM MSB See the description of types of systems par 2 MSB See the description of types of systems par 2 MSB MSTP See the description of types of systems par 2 MTS See MCB NECB This term identifies the remote control switch for the earthing of the neutral of the generator Neutral Earth Circuit Breaker PMCB PMCB Identifies the co
119. current conditions whether or not to start the generator Under these conditions it is possible to force GCU to stop the generator by using the inhibition to starting the generator This internal function once activated takes priority over any other function the generator will be shut down and it will not possible to restart it The function operates in AUTO mode but not in TEST and REMOTE START modes The activation of this function does not require the activation of anomalies When this input is active the inhibition to power load is active e By configuring a digital input with DIF 2501 DST4602x and GC400x or DIF 0040 functions for GC500x When this input is active the inhibition to start the generator is active e Using P 0421 P 0422 and P 0423 parameters it is possible to select the days of the week and a time frame within which the automatic intervention of the generator is allowed Outside of that range and in non selected days the function to inhibit the starting of the generator is active and thus the generator will be stopped 2 3 Forcing of intervention of the generator Depending on the conditions of the system GCU may automatically decide to stop the generator because its intervention is not required for example for emergency systems when the mains is permanently within tolerance lt is anyway possible to force the intervention of the generator even in these conditions in two ways e By activating the
120. d immediately control remote control switch opening as soon as they find to be in parallel with mains all of them immediately request their closing as soon as the parallel phase with mains is finished GCU supposes that the voltage of parallel bars is used to excite the coil of NECB remote control switch So it doesn t manage any early warning for the failed closing of the remote control switch if no GCB is closed bars aren t supplied Anyway the GCU that first closes its own GCB and therefore gives tension to the parallel bars controls the closing of NECB remote control switch an instant before the closing of GCB switch in this way if the system utilizes a subsidiary voltage to excite the coil of NECB present also with all open GCBs NECB will be already closed when the first GCB closes avoiding in this way to leave neutral floating even for just a moment Failed opening and closing of NECB remote control switch should be managed at system level e lf allGCUs control remote control switch opening and it remains closed for the period of time connected with the input that gets the feedback all GCUs will activate the failed opening early warning W205 e f atleast a GCU controls the closing of NECB remote control switch and there is at least one GCB closed but the remote control switch is open for the time connected with the input the gets the feedback GCUs that have controlled the closing will trigger the failed opening early warnin
121. d closes the switch Failure to parallel early warnings are not managed synchronization may last indefinitely To abort a manual synchronization simply select a display page different from B 02 P 0849 and P 0850 parameters are the coefficients for Pl frequency regulator P 0868 and P 0869 parameters are the coefficients for Pl voltage regulator See 4 3 for the procedure to calibrate these parameters During the synchronization you need to manage the rpm regulator frequency and phase In the initial phase GCU adjusts the genset frequency as close as possible to the bar or mains frequency then it stops managing the frequency and it starts adjusting the phase difference to zero During the first phase frequency regulation usually the controller does not use the PI regulator but it adjusts it with approximations with GC400x is possible to enable the PI regulators in this phase too by using the parameter P 1600 1 9 4 6 Use of internal synchro check This term intends the ability of GCU to recognize the situation of synchronized between the two voltage three phase systems GCU provides some parameters to configure this function e P 0841 it configures the maximum voltage difference between the two three phase systems to consider them synchronized e P 0842 it configures the maximum frequency difference between the two three phase systems to consider them synchronized e P 0843 it configures the maximum phase differenc
122. digital input configured with DIF 2712 function this should be active There are no parameters to configure the reset thresholds They are calculated from the triggering thresholds and from hysteresis see 3 2 2 1 P 0908 03 parameter allows deciding whether the protection works on mains linked voltages 0 or on phase voltages 1 Note when the protection is triggered the output configured with the AND OR logics ST 063 status can be activated with a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 lt is preferable to use those outputs to control the opening of the switches 3 2 7 3 Description of operations See diagram 3 2 3 1 See the common notes in 3 2 4 The protection operates on the lowest of mains voltages The operator defines the triggering line see figure above by setting the three triggering thresholds and the three triggering delays e Triggering threshold 1 The protection is triggered if the lowest of mains voltages falls below this threshold and remains below the applicable reset threshold constantly for the triggering time 1 Note for applications in Germany set the triggering threshold 1 to 0 0 to disable it not required e Triggering threshold 2 The protection is triggered if the lowest of mains voltages falls below this threshold and remains below the applicable reset threshold constantly for the triggering time 1 note triggering time 1 not triggering time 2 In
123. e between the two three phase systems to consider them synchronized e P 0844 This parameter configures time GCU allows the closing of the switch if the three previous conditions occurred consecutively for this time and if the sense of rotation of the two three phase systems is the same 9 4 7 Compensation of known phase shifts between the two three phase systems This description applies only to DST4602x and GC400x Sometimes on the systems it can happen that for different reasons it is not possible to connect directly comparable voltage references to GCU For example it could happen that a generator has the alternator in low voltage followed by a step up transformer the parallel with mains is performed in medium voltage In this case medium voltages may be available from the mains and low voltages from the generator Any transformer introduces a albeit minimal phase shift between voltages at its terminals if then the transformer performs triangle star conversion or vice versa the introduced phase shift may be very high GCU is able to correctly carry out synchronization even in a condition like this In detail 92 Parallel functions manual Empowering your control e With P 0845 parameter it is possible to compensate the known phase error introduced by the transformer GCU in this case subtracts the value set in P 0845 by measured phase shift and adjusts generator speed to bring the subtraction result to zer
124. e regulator If GCU is controlled by a MCU board the power factor setpoint is determined by MCU which shall transmit it to GCU through PMCB network Parallel functions manual 101 SICES Empowering your control 5 6 1 2 BASE LOAD or IMPORT EXPORT modes Note this description is only suitable for DST4602x starting from rev 00 48 and for GC400x Note this description is not valid with DROOP mode Note if a digital inout is configured as LOCAL BASE LOAD DIF 2099 the controller works in BASE LOAD The mode SYSTEM BASE LOAD also called steady power is similar to the BASE LOAD mode described above The difference is that the operator selects a reference for the total power factor for all the gensets that compose the power plant The management logic is the following e It calculates the reactive power value equal to the setpoint for the power factor according to the total active power supplied by the gensets e From this value it is deducted the reactive power supplied by the gensets that are not working in SYSTEM BASE LOAD mode e Anew setpoint for the power factor is calculated starting from the reactive power calculated before and the total active power supplied by the gensets The setpoint that results is used by all the gensets that work in SYSTEM BASE LOAD In this way the total power factor of the genset busbar is always equal to the reference selected by the operator
125. e DIF 2211 function for DST4602x and GC400x or DIF 0053 function for GC500x GCU uses the signal acquired by the external load sharing unit only if the digital input is active Finally GCU uses the signal from the load sharing unit only if it knows it is in parallel with other generators So if there are generators controlled by non SICES Srl devices and of which GCU does not know anything it is at least necessary to use an additional GCU digital input to report that at least one of the unknown generators has GCB switch closed When the input is active GCU knows that there is at least another supplying generator and if it closes its GCB it known it is in parallel Use DIF 3004 function for DST4602x and GC400x or DIF 0056 function for GC500x Parallel functions manual 99 SICES Empowering your control 5 6 Production in parallel with mains GCU controls the modulation of active and reactive powers when the generator is in parallel with mains if the continuous parallel with mains is allowed Basically GCU based on performed configuration and on the status of the system determines a setpoint for active power and a setpoint for reactive power Then it uses internal Pl controllers to make sure that the generator supplies exactly the required active and reactive power e P 0871 e P 0872 parameters configure Pl controller for active power acting on voltage regulator This Pl controller is also common to the load distribution see
126. e a digital input to disable the load function Use DIF 2702 function for DST4602x and GC400x or DIF 0033 function for GC500x o Ifthe input doesn t exist or it is active the load function is enabled o Ifthe input exists but it isn t active the load function is disabled Criteria for the automatic start stop of generators are multiple and can be selected through P 0822 parameter Priority on the base of the address This operation is selected through values 1 2 and 3 in the P 0822 parameter The operation logic is quite simple Every GCU calculates the following values e ADPt value kW It is the power absorbed by the load and is calculated as sum of active powers supplied by all generators ADPs e MDPt value kW It indicates the total rated power of supplying generators It is calculated as the sum of the single rated powers MDPs e MDPin value kW It indicates the total rated power of supplying generators save for the generator with less priority see after It is calculated as the sum of the single rated powers MDPs e DPRt value It is the ratio between ADPt and MDPin it indicates the percentage of power supplied by generators on the whole that thanks to the distribution of the load is also the one supplied by each generator e DPRtn value It is the ratio between ADPt and MDPin it indicates the percentage of power that generators would supply if the generator with less priority were stopped see below
127. e analogue input See description above for DST4602x o Suggested Setting the value 7 in P 0971 parameter In this case it is necessary to configure the analogue input with the desired AIF 2305 function see description above for DST4602x GCU allows setting the slope of the frequency DROOP curve via P 0975 parameter Hz It indicates which percentage of the generator rated power P 0125 corresponds to a decrease of 1 Hz of working frequency The image above shows a curve for the DROOP allowing a total range of 4 Hz passing from 0 through 100 of the generator power the value for P 0975 parameter to configure the previous curve would be 25 Hz As mentioned above working with DROOP means imposing a working frequency according to the present load Since GCU interfaces with a rom regulator whose job is to ensure that the engine works at the speed required externally in principle it is not necessary to use a PI regulator on GCU it is enough to calculate the number of rounds corresponding to the present load and request it to the rom regulator This is especially true for electronic engines Can Bus where GCU is able to Parallel functions manual 83 SICES Empowering your control require the exact number of desired rom with extreme precision Even with the traditional rom regulators it is possible to work without a PI regulator in this case GCU expects the engine to react with a 120 rom variation passing from the min
128. e base of generator voltage and frequency This function however needs to measure mains frequency and voltage after the engine has been stopped to allow its re starting If DST4602x does not measure mains frequency and voltage this function stops the engine if the power setpoint is limited by mains frequency or voltage but only if it is limited by a contact 110 Parallel functions manual SICES Empowering your control 6 Neutral earthing remote control switch This term identifies the remote control switch or anyway the switch that connects the generator neutral line to protective earthing It is not the remote control switch used to connect the generator neutral to parallel bars and or users SICES Srl uses the acronym NECB Neutral Earth Circuit Breaker to indicate this remote control switch The currently implemented management for NECB contactor replaces a previous version that was oversimplified In detail e DST4602x simplified management until the review 00 39 Complete management of the review 00 40 e GC400x complete management only e GC500x simplified management until the review 01 29 Complete management starting from review 01 30 DST4602x and GC400x provide for DOF 2061 function to configure a digital output to control NECB remote control switch GC500x supply DOF 0033 function to configure a digital output for NECB contactor control GCU enables the output to close the remote control switch GCU
129. e excluded by CBE function e P 0261 time limit for excitation control and P 0262 minimum speed for excitation control This two parameters are used to exclude from CBE function the generators that even if started don t reach very quickly the minimum rotation speed required to activate 114 Parallel functions manual SICES Empowering your control excitation to alternators the GCUs of these generators will open GCB switch and will go on with the parallel sequence through synchronization Generators that don t reach the minimum rotation speed indicated in P 0262 within P 0261 seconds from the starting request will be excluded by CBE function e P 0263 stabilization time This parameter configures a delay from the time all generators exceed the minimum rotation speed specified with P 0262 before activating the alternators Usually this time should be left on zero to reach parallel as quickly as possible If it is necessary to let engine stabilize before activating excitation to alternators set here a delay in this case also P 0264 parameter should be set on 1 e P 0264 enabling of reduced speed By setting this control on 1 GCUs require reduced speed to the rom regulators until the time when the excitation to alternators is activated It is used to activate excitation when all engines run at the same speed But by setting P 0264 on 1 a delay in the total time for parallel is introduced we
130. e goes on from step 9 In the other cases GCU utilizes the normal time out for the switch In case of failure to opening GCU will activate e W023 early warning MCB not open but only if the continuative parallel with the mains is allowed P 0880 gt 0 so that the generator can go on supplying e Deactivation D023 MCB not open in the other cases The procedure goes on from step 5 9 Opening of MCB and GCB together three attempts This step of the procedure is executed only if shutdown A275 has been activated interface switch not open GCU remains in this status until GCB opens Then the procedure goes on from step 17 10 Opening of MCB with GCB open three attempts if the switch opens the procedure goes on to step 12 In case of opening failure DO23 deactivation is activated MCB not open and the procedure goes on with step 17 11 MCB open GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 16 If there are requests for inhibition to power load the procedure goes on from step 16 If the mains status allows parallel and if it is possible to utilize the synchronization for GCB the procedure goes on from step 16 it will close MCB without synchronization then it will close GCB with synchronization otherwise it goes on from step 12 12 Closing of GCB without synchronization three attempts in case
131. e is GCB P 0900 1 from step 8 when the interface device is MCB P 0900 2 20 Parallel functions manual SICES Empowering your control 7 Opening of GCB with MCB closed three attempts If the switch opens the procedure goes on from step 3 If the protections for the parallel with the mains have been triggered and the interface switch is GCB P 0900 1 if it is not opened within 0 5 seconds from the activation of protections GCU activates A275 shutdown interface switch not open and the procedure goes on from step 9 In the other cases GCU utilizes the normal time out for the switch If case of failed opening e DST4602x and GC400x GCU triggers W024 early warning GCB not open If P 0243 parameter is set to 1 this early warning becomes a request for automatic intervention until the operator recognizes the early warning If there are shutdowns discharges and deactivations the procedure goes on from step 17 otherwise it goes on from step 5 e GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 17 8 Opening of MCB with GCB closed three attempts If the switch opens the procedure goes on from step 13 If the protections for the parallel with the mains have been triggered and the interface switch is MCB P 0900 2 if it is not opened within 0 5 seconds from the activation of protections GCU activates A275 shutdown interface switch not open and the procedur
132. e is one of them called ESU that has special functions usually linked to synchronization sharing of information with all the other devices The selection of this device is automatic it doesn t require any configuration If some MCU devices are connected within PMCB network ESU is for sure one of them it is the one with the lowest address the address is configured on MCU with P 3701 parameter If on the contrary there are no MCUs in PMCB network ESU is the GCU device with the lowest address the address is configured through P 0452 parameter on GCU BTBCU devices never act from ESU If the currently selected ESU device is disconnected from PMCB network another one will be promptly selected 116 Parallel functions manual SICES Empowering your control 8 2 Synchronization of clocks Clocks calendars of all SICES Srl s device connected to PMCB network are automatically synchronized with those of ESU device see 8 1 In case it is necessary to modify date time it is necessary act on ESU device only 8 3 Propagation of parameters Some configuration parameters are automatically shared on PMCB network among all the other GCUs In fact it is enough to modify them on a GCU to have them modified also on all the other ones It is advisable but not essential to modify these parameters on ESU devices Involved parameters are e P 0259 P 0264 DST4602x connected to function CBE see 7 e P 0803 e P 0805 e P 0806 e P
133. e of the curve These two values can be set with GCU parameters P 0986 parameter allows defining the no load voltage Vac i e the working voltage when the generator is without reactive load This parameter can be modified on GCU even when the engine is running All GCUs allow the modification of this parameter when the DROOP mode is active directly from the display page that shows the single line system diagram As an alternative to this parameter it is possible to use an analogue input to acquire the value of no load voltage In this case the no load voltage will no longer be adjustable by the GCU panel P 0986 is ignored but it will anyway be displayed e DST4602x o Obsolete Configure the desired analogue input with AIF 2402 function In this way the conversion of the value acquired by the analogue input in no load voltage is performed with P 0984 and P 0985 parameters The no load voltage for the DROOP will be set up in P 0984 when the analogue input is at its minimum value 0 it will be configured with P 0985 when the analogue input is at its maximum 100 By setting P 0984 to a value higher than P 0985 a reverse scaling will be achieved when the measure acquired by the analogue input increases the no load frequency decreases o Suggested Configure the desired analogue input with AIF 2403 function In this way the conversion of the value acquired by the analogue input in no load frequency is performed via a
134. e power setpoint The different modes are described in the following paragraphs It is possible to use an external device called modulator to manage power adjustment when the generator is in parallel with mains same as mentioned 5 5 3 for the external load sharing unit P 0880 parameter is the starting point for mode selection e 0 in this case the continuous parallel with mains is not allowed e 1 BASE LOAD 102 Parallel functions manual 9 6 2 1 SICES Empowering your control e 2 IMPORT EXPORT e 4 SYSTEM BASE LOAD only for DST4602x and GC400x The choice made with P 0880 represents a basic choice but it could be further modified using digital inputs If these inputs are not all active P 0880 parameter shall apply The following functions to configure the digital inputs affect the selected mode e DIF 2099 for DST4602x and GC400x if this input is active and the parameter P 0880 is set on 4 the selected mode becomes BASE LOAD e DIF 2092 function for DST4602x and GC400x or DIF 0077 function for GC500x if this input is active and P 0880 parameter is set to 1 the selected mode becomes BASE LOAD alternative setpoint e DIF 2093 function for DST4602x and GC400x or DIF 0038 function for GC500x if this input is active and P 0880 parameter is set to 1 the selected mode becomes IMPORT EXPORT It has higher priority than the input selecting BASE LOAD alternative setpoint e DIF 2096 funct
135. e the procedure goes on from step 5 5 GCB closed not in parallel with other generators or mains If GCU realizes that it in parallel with mains the procedure goes on from step 8 If GCU realizes that it is in parallel with other generators the procedure goes on from step 7 In the case of shutdowns discharges or deactivations or if there are requests for inhibition to power load the procedure goes on from step 10 If you the automatic triggering of the generator is no longer required the procedure goes on from step 10 6 Closing with synchronization of GCB This phase lasts maximum P 0852 seconds If the switch closes the procedure goes on from step 8 if the generator is in parallel with mains otherwise from step 7 in parallel with other generators If GCB isn t closed within the time limit GCU will activate A271 shutdown failed parallel on GCB and the procedure goes on from step 11 7 GCB closed in parallel with other generators Active and reactive power distribution functions have been activated Each GCU Knowing the total active and reactive power of the load and knowing the rated power of all generators calculates the active and reactive power in percentage entitled to it and then controls the rom and voltage regulators in order to deliver calculated powers If GCU realizes that it in parallel with mains the procedure goes on from step 8 If GCU realizes that it in parallel with other generators the procedure comes b
136. e were any local loads For the sake of simplicity GCU applies the limitation always and only to the power supplied by the generator because systems that also provide for the emergency for example hospitals should be able to be isolated from mains for stricter voltage frequency thresholds to protect loads and therefore they should not be involved by power limitation At any rate nothing prevents that in the future we can complicate this management to create a real limitation on the power exported to mains in this case however DST4602x should get power measure on the interchange point with mains 9 6 3 1 Reduction of the power supplied by mains high frequency The standards provide for a limitation on the power exported to mains when frequency on the same mains increases As a matter of fact if mains frequency increases it means that there is a production surplus and therefore it is necessary to reduce production Until mains frequency is lower than P 0951 threshold percentage of P 0105 the power supplied by the generator should not be limited When mains frequency exceeds this threshold consecutively for P 0952 seconds GCU should e Memorize the power that the generator was supplying at that time this power value is referred to as initial power below e Activate the limiting phase While the limiting phase is active DST4602x should continually calculate the generator power setpoint by subtracting a value proportional to incr
137. ease of mains frequency from the initial power P 0953 parameter determines the quantity which should be subtracted from the initial power for each Hz of mains frequency increase with reference to P 0951 threshold The parameter is expressed as Hz the percentage however does not refer to the rated power of the generator but to initial power The reduction works on the maximum frequency reached by mains while the limiting phase is active if the frequency rises to 50 5Hz but then drops to 50 3 Hz the reduction percentage is always calculated with reference to the value 50 5 The standard as a matter of fact require that the power supplied by the generator can never be increased but only reduced until mains frequency comes back to acceptable values The limiting phase ends when mains frequency is steadily included between P 0905 and P 0906 thresholds see 3 2 1 for the time configured in P 0903 DST4602x records EVT 1121 event every time this limitation is activated and EVT 1122 event each time it is deactivated Parallel functions manual 107 SICES Empowering your control Example of use P 0951 Mains high frequency threshold for the limitation of active power 100 6 setpoint 50 3 Hz P 0952 Delay for active power setpoint limitation for mains high frequency P 0953 Active power setpoint limitation ratio for mains high frequency Hz Let s suppose to use a 1000 kW generator in parallel with mains The
138. echnical manual for a detailed description of the device Here it is essential to highlight only the two possible mode by means of which MCU can work with the GCUs e Normal mode In this mode single devices of GCU work according their own logics simply by receiving from MCU information regarding the status of mains and MCB and MGCB switches The only controls that MCU can send to GCU are synchronization controls aimed to the closing of MCB and MGCB switches e GCUs controlled by MCU It is possible to obtain this mode by activating the inhibition to intervene on GCU boards stably through a contact see 2 2 In this way GCU cannot start stop the generator on the basis of its own logics on the contrary MCU through controls on network PMCB will control start and stop of generators according to its own needs MCU controls the starting of a generator by forcing its relevant GCU in REMOTE START mode it controls the stop by removing the REMOTE START request MCU in this mode also manages active and reactive power setpoints during the phase of parallel with mains Moreover it is able to use the load function in parallel with mains too in order to utilize generators strictly necessary to supply the required power to the mains e Mains supports up to 4 MCU 8 7 2 BIBCU devices Please see BTB100 technical manual for a detailed description of the device e Mains supports up to 8 BTBCU Parallel functions manual 125
139. ected to network PMCB P 0803 is known In this case in fact it is possible to configure the GCUs in order not to close its relevant GCB if the real number of connected GCUs doesn t match the configured one dangerous situation two GCUs not connected to the same PMCB network could close their GCB switches at the same time P 0804 parameter allows to select e 0 the GCUs cannot close their own GCB if the real number of GCUs doesn t match the configured one the default value is healthily advised Parallel functions manual SICES Empowering your control e 1 the GCUs can close their own GCB even if the real number of GCUS doesn t match what configured Warning if the number of GCUs connected to PMCB network P 0803 0 is not configured the system that authorizes the closing of GCB switches works in any case it simply cannot consider GCUs that doesn t communicate any more on PMCB network as possible because of a failure of the communication cable 8 5 Actions in case of GCB not open For systems with parallel among generators not in parallel with mains if a generator that has to disconnect from parallel cannot open its own GCB it will be then dragged by means of its alternator by the other generators This situation is dangerous the dragged generator is damaged and can be avoided in two manners e Only for DST4602x if there aren t shutdowns deactivations or discharges by setting P 0243 parameter on 1 DST460
140. ection is triggered the output configured with the AND OR logics ST 058 status can be activated with a delay ranging from O to 10 ms compared to the outputs described in 3 2 4 2 lt is preferable to use those outputs to control the opening of the switches 3 2 16 2 Description of operations See the common notes in 3 2 4 The protection is triggered when e The sign of the phase skip measured is compatible with what configured with P 0941 parameter e The measured amplitude of the phase skip is higher in absolute terms than the triggering threshold The protection is reset when the reset delay from the triggering has elapsed 3 3 Operation sequence If the system allows the continuous parallel with the mains it is mandatory that e Protections for the parallel with the mains are available A digital input configured properly see 3 1 should exist or if the internal sensor is used at least one of the described protections for the parallel with the mains 3 2 should be enabled e Select the switch which should act as interface switch with P 0900 parameter The term interface switch identifies the switch MCB or GCB that will be opened immediately at the time when a protection for the parallel with mains is triggered The opening of this switch should isolate the generator from the mains depending on the selected switch the users will stay connected to the mains or to the generator The interface switch should be opened withi
141. em with fleeting parallel See notes in 2 4 that applies to this system too This kind of system is very similar to the previous one it provides a single generator that performs the emergency service to mains GCU provides to start the generator if the mains is out of tolerance from the configured time it stops it if mains is within tolerance for the configured time But unlike SSB system GCU allows the parallel with mains Usually the parallel with mains is temporary P 0880 0 it is used to avoid a blackout on users during the switching of users from generator to mains when mains comes back or from mains to generator in case of forced intervention in TEST or REMOTE START mode In both cases GCU synchronizes tensions frequency and phase of generator with mains closes a switch and within a time limit opens another switch The maximum duration of the parallel is 1 second to use a longer time but anyway limited set the needed time in P 0890 parameter and set P 0880 to a value different from zero This kind of system also allows the continuative parallel with mains if P 088 is different from zero Usually this function is used to test the loaded engine TEST without anyway disconnecting users Parallel functions manual 15 SICES Empowering your control from mains In this case there isn t a limit to the duration of the parallel Please refer to the paragraph 3 for all regulations that rules parallel with mai
142. ences are expressed as percentages values 0 100 Installation note During commissioning of the generator it is necessary to act on the trimmers of voltage and rom regulators if any so that by setting internal references to 50 see below _ the engine runs at the rated rotation speed and the alternator supplies the rated voltage It is possible to make minor adjustments directly from GCU It often happens that with the default setting the engine does not rotate exactly at 1500 rpm but for example it rotates at 1480 rpm If it is difficult to act on the trimmer of the rom regulator it is possible to increase the internal speed reference for example by bringing it from 50 0 to 50 5 to get the desired engine speed However avoid moving the internal reference to a value lower than 45 or higher than 55 In these cases the adjustment dynamic is too unbalanced and this could give problems to the rom and voltage regulators management function used for parallel logics Note for GC400x on this controller it is possible to enable the controls of frequency and voltage even during the island operation Disable these controls before carrying out the previous operation set P 1600 and P 1650 to zero In this way you are sure to have the dynamics of the regulation signals focused on the nominal values of frequency and voltage Once these regulations are done it is possible to enable the controls again see the following chapters 4 1
143. engine and only to allow to close GCB In manual mode GCU allows the opening of both switches Manual sequence The operator can start stop the generator with START and STOP keys If GCB switch is controlled by GCU the operator can request its closing under the conditions described above or its opening with GCB key If the operator wants to close GCB while MCB is closed GCU first will open MCB if controlled by it and then close GCB Only when a delay for the digital input that acquires feedback of GCB switch has been configured GCU activates Parallel functions manual SICES Empowering your control e W014 early warning in case of failed closing e W024 early warning in case of failed opening If MCB switch is controlled by GCU the operator can require opening or closing by means of MCB key or with the combination of SHIFT GCB keys for GC500 GC500Pl s and GC400x lf the operator wants to close MCB while GCB is closed GCU first will open GCB if controlled by it and then close MCB Only when a delay for the digital input that acquires feedback of MCB switch has been configured GCU activates e W013 early warning in case of failed closing e W013 early warning in case of failed opening DST4602x and GC400x to force the opening of the switch with stopped engine MCB key should be pushed or SHIFT GCB for some version of GC500 and GC500Plus for 5 seconds Automatic sequence The automatic intervention
144. ent when the value acquired by the analogue input increases the value of the fine tuning decreases o Suggested Using AIF 2201 function In this case the conversion between the value acquired by the analogue input and the fine tuning is performed via a conversion curve see operating instructions e GC400x o Using the function AIF 2201 In this case the conversion from the value acquired by the analogue input and the fine tuning is carried out through a conversion curve see the user s manual e GC500x o Obsolete lt is necessary to select an analogue input through P 0864 parameter any value other than 0 and 7 In this case there is no need to configure anything in the parameters related to the selected analogue input and P 0865 and P 0866 parameters are used for scaling the analogue input See description above for DST4602x o Suggested Setting the value 7 in P 0864 parameter In this case it is necessary to configure the analogue input with the desired AIF 2101 function see description above for DST4602x If the system is composed of several generators the procedure for the fine tuning of speed should be performed on all generators to obtain the same rotation speed or the same frequency If this is not performed then there will be problems in the active power distribution phase except for GC400x as in 5 5 NOTE if there is a potentiometer for the fine tuning of speed it should not be used t
145. ently selected is generator 4 The internal list of priorities will be the following one 4 6 7 9 10 1 2 When the master generator is changed the list of priorities changes immediately In this case generators that have acquired priority but that are currently stopped because before the change of the master were the ones with less priority are started first Then if needed the generators not required with less priority are stopped Warning if there are some supplying generators with the load function disabled and these generators are enough to supply the load all generators with the load function enabled will be turned off master generator included DST4602x and GC400x allow a further customization through P 0816 parameter DST4602x or P 0820 parameter GC400x That allows indicating a minimum number of generators that should be kept in action even if all of them aren t necessary to supply the load The difference among the three modes described below consists in the criterion used to select the master generator It is also possible to select the master generator by activating a digital input configured with DIF 2121 for DST4602x and GC400x or DIF 0062 for GC500x functions The GCU with the input activated is automatically selected as the master one The input has not to be activated on more than one GCU otherwise the master generator will go on changing among GCUs with active inputs When a
146. er 2 or 3 values However if the use of internal synchro check is enabled and GCU cannot manage it internally GCU activates W273 early warning inconsistent parameters If the internal synchronizer or even just the internal synchro check is used the control to close the switch is activated only when GCU recognizes the synchronized condition In the other cases external synchro check GCU keeps the control to close the switch always active during the whole synchronization it is up to the external synchronizer or to any external synchro check to provide a contact that indicates the status of synchronized which should be used for the actual closing of the switch in series with the control of the GCU for closing the switch If MCB is controlled externally P 0855 gt 2 GCU cannot know when the external logic wants to close the switch and therefore cannot know when to activate the synchronization procedure It is therefore necessary an external request for synchronization e lf MCB is managed by a MCU the request for synchronization and also the controls for rom and voltage regulators are transmitted by MCU to GCUs through PMCB communication bus On GCU nothing else is required e f MCB is managed by other devices the presence of a digital input configured with DIF 1034 for DST4602x and GC400x or DIF 0052 for GC500x functions is required when this input is active GCU performs the synchronization procedure if it can
147. er way for example with a digital input that inhibits the starting the load function immediately starts a new genset if needed but it does not stop the genset For DST4602x starting from the version 00 48 and GC400x another function has been added If one genset has to open its own GCB but not because of alarms of deactivations so it doesn t have to do it immediately it is immediately excluded by the load function in this way the load function itself possibly starts new gensets which will have to supply the power currently supplied by it Only if the remaining gensets are able to supply the load at the end of the power ramp or if there aren t other gensets to start GCU will proceed to unload the power if possible and open the GCB Anyhow there is a time of max 30 seconds for this function after said time the genset unloads the power and opens the GCB Note this function is only activated if all controllers connected on PMCB support it so far only DST4602x with software 00 48 or following or GC400x 8 7 Devices on network PMCB As already said above it is possible to connect three categories of devices to network PMCB e GCU The network supports up to 24 GCU but the limit will be reduced to 16 GCU if only GC400x or GC500x are used e MCU Mains supports up to 4 MCUs e BTBCU Mains supports up to 8 MCUs 124 Parallel functions manual SICES Empowering your control 8 7 1 MCU devices Please see MC100 t
148. ested Configure the desired analogue input with AIF 2105 function In this way the conversion of the value acquired by the analogue input in the speed control for the engine is performed through a conversion curve see technical manual It is also possible to use AIF 2103 function if the external synchronizer is used both for GCB and MCB in this case see description in 5 4 2 e GC400x Configure the analogue input with the AIF 2105 function In this way the conversion of the value acquired by the analogue input to the engine speed command is carried out through a conversion curve see technical manual lt is also possible to use the AlF 2103 function if the external synchronizer is used for both GCB and MCB in this case see the description in 9 4 2 e GC500x It is necessary to select an analogue input through P 0833 parameter any value other than 0 In this case there is no need to configure anything in the parameters related to the selected analogue input and P 0835 and P 0836 parameters are used for scaling the analogue input See description in 5 4 2 It is possible to configure a digital output see 5 4 1 that activates during synchronization to enable the external synchronizer or to feed it 9 4 5 Use of the internal synchronizer Synchronization can be performed both manually and automatically e AUTO GCU uses PI regulators to bring frequencies and voltages of the two three phase systems to very close values then i
149. for the BASE LOAD from the analogue input or whether to use P 0884 parameter Configure the input with DIF 2710 function e lf the input is active the setpoint for the BASE LOAD is acquired by the analogue input e If the input is not active the setpoint for the BASE LOAD is P 0884 parameter If GCU is controlled by a MCU board the power setpoint for the BASE LOAD is determined by MCU which shall transmit it to GCU through PMCB network see Errore L origine riferimento non e stata trovata 9 6 2 2 BASE LOAD mode alternative setpoint Note this description does not apply if DROOP mode has been activated Note if a digital input configured with DIF 2095 disable power control function for DST4602x and GC400x or DIF 0058 function for GC500x is active active power modulation is disabled and the rom regulator is controlled as indicated in 5 1 The same as in the previous paragraph is valid The difference is that in this mode the active power setpoint is taken from P 0902 parameter All GCU allow the modification of this parameter directly on the display page that shows the single line diagram of the system when this mode is selected It is not possible to use the analogue inputs to acquire the alternative setpoint 5 6 2 3 IMPORT EXPOR mode T Note this description does not apply if DROOP mode has been activated Note if a digital input configured with DIF 2095 disable power control function for DST4602x and GC400x
150. g W204 6 2 2 One remote control switch for each generator This management mode provides for each generator to have its own NECB remote control switch This management is more complicated but is the only one that can be applied in case of modular generators containers GCU presupposes that the generator voltage is used to excite NECB remote control switch For this reason it is necessary that the remote control switch is closed only when generator voltage is within tolerance otherwise the remote control switch trills accordingly the remote control switch will be opened during the starting and stopping phase of the generator In these phases GCB is open and therefore the opening of NECB remote control switch doesn t affect on the earthing of the rest of the system but it could create problems of measure to GCU it is tolerated because it is a temporary situation GCU controls the opening of the remote control switch in the following situations e When GCB is open o If the engine is idle o If the engine is in action but the generator voltages are out of tolerance e When GCB is closed o Ifthe generator is in parallel with mains both MCB and MGCB switches closed 112 Parallel functions manual SICES Empowering your control o If the generator isn t in parallel with mains MCB and or MGCB switches open but is in parallel with another generator that is more entitled than it to close its own NECB remote control switch b
151. g to use the DROOP curve shown in the figure above Let s suppose to have a 100 kW generator and a 200 kW generator Let s suppose that the load is 80 kW Finally let s suppose to start with a single generator that supplies the load G1 the 100 kW one e G1 generator supplies the full load 80 kW and therefore supplies 80 of its rated power According to the DROOP curve 80 of the power should work at a frequency of 48 8 Hz Therefore it orders the rom regulator to work at that frequency and not being in parallel with anything after a few sinusoids it actually supplies 80 kW at 48 8 Hz e G2 generator 200 kW closes its GCB and so it is in parallel with G1 without knowing it As soon as it gets into parallel G2 is without load and then based on the DROOP curve it should work at 52 Hz Therefore it orders the rom regulator to work at 52 Hz e The previous control of G2 has the immediate effect of causing the transfer of part of the load from G1 to G2 because the rpm regulator of G2 requires a higher speed than that of G1 In the long term it also has the effect of a rise in the frequency of both generators that is the same as they are in parallel Suppose that 40 kW are transferred from G1 to G2 e At this point both generators are delivering 40 kW o G1 40 of rated one It should work at 50 4 Hz o G2 20 of rated one It should work at 51 2 Hz Both generators try to control the frequency as required by the load As you can
152. gard to the management of the active power refer to the above mentioned With respect to the management of the frequency GCU uses the set point P 1604 see 5 2 1 The parameter P 1605 establishes if the frequency fault counts more than the active power fault By default this parameter is set at 50 in this way the active power error equals the frequency one By increasing the value of P 1605 the active power error weighs more there will be a better active power sharing and a higher frequency error Instead by decreasing the P 1605 value the frequency error weighs more there will be a better nominal frequency control in spite of the accuracy on the active power sharing When you use this method GCU ignores the dead band parameters Note as per the following diagram there is only a regulation PID the parameters that configure it are P 0871 and P 0872 P 0977 and P 0978 are not used in this situation The following diagram shows the operation Parallel functions manual 95 SICES Empowering your control Frequency reference Frequency feedback Speed offset Power feedback P 1605 Active Power regulation factor 9 9 2 Voltage adjustment When the genset is in parallel with other gensets GCU usually manages the voltage regulator in order to supply the reactive power to the genset as previously described Anyhow it is necessary to check the voltage too otherwise even if slowly this will decrease and
153. generator is required SPIM SSB e SSB SSTP is an emergency system and therefore the generator is started automatically only in case of failure of mains To put the generator in parallel with mains it is necessary to force it to start when mains is present see2 3 e SPtM SSB is both a stand alone supplying and supplying in parallel with mains system In automatic mode the generator is started both when the mains is within tolerance and when it is out of tolerance or not present in the first case the generator will supply in parallel with mains in the second the supplying will be stand alone Parallel functions manual 5 Empowering your control The same distinction applies to MSB MSTP and MPTM MSB systems The different types of systems will be described in detail below Only for DST4602x and GC400x it is possible to configure some digital outputs with DOF 0103 function AND OR logics to indicate the type of selected system e Status ST 108 the output will be activated for emergency systems SSB SSB SSTP MSB M SB MSTP e Status ST 109 the output will be activated for systems in parallel with mains SSB SSTP SPtM SPtM SSB MSB MSTP MPtM MPtM MSB e Status ST 110 the output is activated for systems in parallel with other generators MPM MSB MSB MSTP MPtM MPtM MSB Some GCUs manage just one part out of 10 listed plant types see the parameter table of ea
154. generator supplies 800 kW mains frequency is 50 Hz Mains frequency begins to rise When it exceeds 50 3 Hz for 1 0 seconds DST4602x memorizes internally the supplied power at that time 800 kW and starts to apply the limitation according to the following chart Potenza kW 900 00 800 00 700 00 600 00 500 00 400 00 300 00 200 00 100 00 0 00 49 5 50 0 50 5 51 0 515 52 0 Frequenza Hz Let s suppose that frequency rises to 51 0 Hz Power will be limited to about 320 kW Should then frequency come back to 50 5 Hz power will not be limited to about 670 kW but it will remain at the minimum reached value 320 kW in this example The limitation will be removed and thus the generator will supply 800 kW again only when frequency returns come back between P 0905 and P 0906 thresholds for P 0903 time 9 6 3 2 Reduction of the power supplied due to mains low frequency Under the new standards the generator should stay in parallel with mains even with frequencies lower than the rated one up to 47 5 Hz In these conditions there are two effects e By considering that the engine has a constant torque above 45 Hz there is still a decrease in the maximum power that could be supplied power torque x rom Therefore the maximum power that can be supplied by the engine decreases when rounds decrease and thus when frequency decreases e When frequency decreases the voltage regulator would attempt to lower voltage according to its H
155. guration with the parameters indicated above GCU is able to measure mains frequency and voltage It is now necessary to configure thresholds and delays relating to the parallel with mains Note in case of using an internal sensor the possible mains status sent to the MC100 controller on Can Bus PMCB is ignored 3 2 1 Authorization to parallel GCU allows the supply in parallel with the mains if no protection for the parallel with the mains has been triggered Everything that follows in this section is valid for DST4602x and GC400x but in the future also for all GCUs DST4602x and GC400x device has moreover implemented the latest European standards for parallel with mains In short the new regulations require that the generator can be in parallel with mains even if the voltage and frequency of mains diverge significantly from rated values once however that the parallel has been discontinued it is necessary that mains voltage and the frequency come back close to rated values to enable the new parallel This configuration on DST4602x and GC400x is performed with the following parameters reo cas Sse from mains within tolerance o Favs on Teas consent parallel A Po a ore poe consent parallel Maa ea rere ea ieee consent parallel rove secon ee reve A consent parallel mains failure protections The Italian legislation specifies that mains frequency should be between 49 95 and 50 05Hz and that
156. gured to avoid blackout on users when mains come back during commutation between mains and generator if shutdowns deactivations and discharges aren t present In this case the presence of W272 early warning failure of parallel on MCB corresponds to a request for automatic intervention of the generator which will be annulled only when the operator recognizes the early warning DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence of W024 early warning GCB not open corresponds to a request for an automatic intervention of the generator which will be annulled only when the operator recognizes the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e Protections for parallel with mains have been triggered MCB is closed and GCB is configured as interface switch P 0900 1 or anyway if MCB doesn t open within 0 5 seconds e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 Moreover it has to decide whether MCB switch has to be closed or not MCB shall be opened if protections for parallel with mains
157. h if controlled by GCU can always be closed Since the stand alone supply is not available MCB can be closed only without synchronization and then only if GCB is open Normally MCB can be opened only if it is selected as interface switch P 0900 and if the protections for the parallel with mains are triggered In manual mode GCU allows the opening of both switches Manual sequence The operator can start stop the generator with START and STOP keys If GCB switch is controlled by GCU the operator can request its closing under the conditions described above or its opening with GCB key If it requires the closing of GCB switch by pressing this button the synchronization function will be activated see 5 4 If it requires the opening of GCB by pressing this key the gradual unloading of the power will be activated when the power of the generator is lower than the configuration with P 0878 parameter or at the latest after P 0879 seconds GCU will open GCB switch If the key is held down for more than a second GCU opens GCB switch immediately In case of failure to open GCU activates W024 early warning If MCB switch is controlled by GCU the operator can require opening or closing by means of MCB key or with the combination of SHIFT GCB keys for some version of GC500 and GC500Pls and GC400x The closing of MCB is possible only without synchronization i e with open GCB in case of failed closing GCU activates W013 early warn
158. h 3 for all regulations that rules parallel with mains Main status The status of the power mains is critical for this kind of system and should be acquired by GCU It is used to allow or not the parallel with mains Refer 2 4 to notes on the mains sensor MCB command P 0855 parameter allows the configuration of the way GCU has to manage the switch e P 0855 0 MCB controlled by GCU synchronization not available e P 0855 1 MCB controlled by GCU synchronization available e P 0855 2 MCB controlled externally synchronization not available e DST4602x and GC400x P 0855 3 MCB controlled externally synchronization not available On GC500x value 3 is not available instead value 2 is used Although GCU accepts any value actually for this type of system it is never possible to close MCB with the synchronization as a matter of fact as the stand alone supply is not allowed it is never possible to have GCB closed with MCB open Therefore the values 1 and 3 should not be used for this type of system The MCB key of the GCU panel or the combination of keys SHIFT GCB on GC500 GC500P lus and GC400x can be used in MAN to open and close the switch if controlled by GCU Feedback MCB Use DIF 3002 DST4602x and GC400x or DIF 0006 functions for GC500x to configure the input that acquires the feedback Since the system allows parallel with mains it s mandatory to connect the feedback of MCB switch GCU uses it
159. has been activated e In TEST and in REMOTE START always ignoring inhibitions to starting DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence W024 early warning is equivalent to a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 The normal automatic operation logic if GCU controls GCB will be therefore 1 Engine stopped and GCB open If the automatic intervention of the generator is required the procedure goes on from step 2 2 Engine starting wait status before voltage and frequency are within tolerance Then the procedure goes on from step 3 3 GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 7 If there are requests for inhibition to power load the procedure remains at this point Otherwise the pro
160. hase voltages 1 For GC500x the protection always acts on linked voltages There are no parameters to configure the reset threshold There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresis see 3 2 2 1 There are no parameters to configure reset delay The delay is 700 ms on DST4602x and GC400x 0 ms on GC500x Note when the protection is triggered the output configured with the AND OR logics ST 054 status can be activated with a delay ranging from O to 10 ms compared to the outputs described in 3 2 4 2 It is preferable to use those outputs to control the opening of the switches 3 2 9 2 Description of operations See diagram 3 2 3 2 See the common notes in 3 2 4 The protection is triggered when at least one mains voltage is above the triggering threshold consecutively for the triggering delay The protection is restored when all mains voltages are below reset threshold consecutively for the reset delay 3 2 10 59 U gt protection Maximum voltage This protection is available only for DST4602x 3 2 10 1 Configuration Valid values Pane eters eae GC400x GC400x GC400x Note GC400x GC400x functions DOF 0103 AND OR logic with status ST 060 triggered protection DST4602x and GC400x P 0908 06 parameter allows deciding whether the protection works on mains linked voltages 0 or on phase voltages 1 There are no parameters
161. have been triggered if GCB is closed and if MCB is configured as interface device P 0900 2 or anyway if GCB doesn t open within 0 5 seconds MCB can be closed in the following cases e GCB open e GCB closed but only if o Tension and frequency of mains allow the parallel o Synchronization for MCB is allowed o There aren t shutdowns and deactivations If all of the previous conditions are met MCB can be closed e f stop of generator is required e f permanent parallel with mains is allowed P 0880 gt 0 and the function Transfer to generators is activated DIF 2096 The logic used by GCU ims to avoid as far as is possible blackouts on users So when possible GCU always utilizes synchronization to close switches Moreover GCU always try when possible to keep MCB switch closed Therefore if the continuative parallel with mains is allowed P 0880 gt 0 and if mains status authorizes parallel GCU will always try to put generator in parallel with mains If according to the previous conditions GCU is forced to keep open MCB switch it is necessary to use a digital input configured with DIF 2096 function Transfer to generators The normal automatic operation logic if GCU controls both switches will be therefore Parallel functions manual 19 SICES Empowering your control 1 MCB closed GCB open engine stopped If the automatic intervention of the generator is required the proced
162. he normal AUTOMATIC operation logic if GCU controls both switches will be therefore 1 MCB closed GCB open engine stopped If the automatic intervention of the generator is required the procedure goes on from step 2 2 Starting of the engine It attests that tension and frequency are within tolerance Then the procedure goes on from step 3 3 MCB closed GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 10 If there are requests for inhibition to power load the procedure waits at this point otherwise it will go on from step 4 14 Parallel functions manual SICES Empowering your control 4 Opening of MCB three attempts in case of failure to opening D023 deactivation is activated MCB not open and the procedure goes on from step 10 If the switch opens the procedure goes on from step 5 5 MCB open GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 9 If there are requests for inhibition to power load the procedure goes on from step 9 Otherwise the procedure goes on from step 6 6 Closing of GCB three attempts in case of failure to close D014 deactivation GCB not closed will be activated and the procedure will go on from step 9 If the switch is closed the proced
163. hronization of GCB This phase lasts maximum P 0852 seconds If the switch is closed the procedure goes on from step 7 If GCB isn t closed within the time limit GCU will activate A271 shutdown failed parallel on GCB and the procedure goes on from step 10 7 GCB closed in parallel with other generators Active and reactive power distribution functions have been activated Each GCU knowing the total active and reactive power of the load and knowing the rated power of all generators calculates the active and reactive power in percentage entitled to it and then controls the speed and voltage controllers in order to deliver calculated powers If GCU realizes that it is no longer in parallel with other generators the procedure goes back to step 5 If the generator should to be stopped due to serious problems shutdowns or deactivations the procedure goes on from step 9 If the generator should be stopped because discharges or if an inhibition to power load have been activated the procedure goes on from step 8 If you the automatic triggering of the generator is no longer required the procedure goes on from step 8 8 GCB closed power discharge The power of the generator is reduced to 0 kW with a rhythm that can be configured with P 0874 parameter or P 0875 if there are discharges This phase lasts until the power of the generator becomes lower than P 0878 threshold or after the time limit configured with P 0879 Then the procedure goe
164. iate from rated value SICES GCUs can use two systems 9 9 1 1 Method 1 This method can be used on all GCU On GC400x check that the parameter P 1600 3 is set at 0 With this method GCU works in the following way e When the percentage error in the adjustment of active power is higher than a configurable threshold GCU controls the active power e When the percentage error in the regulation of active power is lower than the configurable threshold GCU sets the control for the rom regulator back to the value used outside the parallel which corresponds to rated frequency or anyway to what as determined with the fine adjustment see 5 1 The threshold is configurable through P 0877 parameter of P 0125 and is called dead band because when the control error is lower than it there is no longer any adjustment but simply GCU requires the nominal frequency to the rom regulator All GCUs in time continually get in and out the dead band thereby ensuring a proper distribution of active power and at the same time the keeping of nominal frequency of parallel bars By reducing P 0877 value the probability of entering a dead band is reduced therefore the accuracy of distribution will be increased because GCUs spend more time adjusting power but it is accepted that transiently the frequency may derive slightly with reference to rated value Conversely if the value of P 0877 increases the precision in adjusting the frequency increase
165. imum value to the maximum value of the control analogue output Instead using a rom requlator with UP DOWN controls it is mandatory to use the PI controller on GCU The parameters that configure the PI regulator for the frequency DROOP are P 0977 and P 0978 By setting them both to zero the PI regulator will be disabled See 4 for the adjustment of the two parameters Note for GC400x for this GCU it is necessary to clearly enable the frequency regulation during the DROOP by means of the P 1600 4 it is not sufficient to set P 0977 and P 0978 different from zero As a rule the DROOP is used for the parallel with the generators controlled by non SICES Srl devices It is not used for the parallel with mains As a rule therefore the GCU working in DROOP does not know it is in parallel with something else therefore it cannot manage the loading and unloading phases in the stages of entry into and exit from parallel If however GCU knows it is in parallel with something else for example if it is used in DROOP also in parallel with mains then it can manage loading and unloading phases P 0976 parameter is used to configure loading and unloading phases Hz s it indicates the maximum speed at which GCU modifies its internal frequency setpoint See notes in 5 3 3 9 3 2 Voltage DROOP Note if there is an active digital input configured with DIF 2095 for DST4602x and GC400x or DIF 0058 for GC500x functions the DROOP mode is disab
166. ing normally connected to a potentiometer on the front panel If an analogue input is used P 0840 parameter is no longer used and it is not therefore possible to vary the frequency from GCU panel In any case on the display page devoted to synchronization GCU shows the fine tuning value acquired by the analogue input The analogue input should be configured as follows e DST4602x o Obsolete Using AIF 2100 function In this case P 0838 and P 0839 parameters are used for scaling the analogue input When the input takes the value configured in P 0838 the fine adjustment is set to 0 When the analogue input takes the value configured in P 0839 the fine tuning is set to 100 It is possible to set P 0838 to a value greater than P 0839 therefore getting a reverse adjustment when the value acquired by the analogue input increases the value of the fine tuning decreases o Suggested Using AIF 2101 function In this case the conversion between the value acquired by the analogue input and the fine tuning is performed via a conversion curve see operating instructions e GC400x 76 Parallel functions manual 9 1 2 SICES Empowering your control o Using the function AIF 2101 In this case the conversion from the value acquired by the analogue input and the fine tuning is carried out through a conversion curve see the user manual e GC500x o Obsolete It is necessary to select an analogue input through P 08
167. ing If the opening of MCB switch is required GCU opens it immediately in case of failure to open it activates W023 early warning and also immediately opens GCB switch since it is not possible to supply stand alone Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no inhibition to starting is active and if the status of the mains authorizes the parallel with mains e In TEST and in REMOTE START always by ignoring inhibitions to starting and mains status DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence of W024 early warning GCB not open corresponds to a request for an automatic intervention of the generator which will be annulled only when the operator recognizes the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e The protections for the parallel with mains have been triggered e The status of the mains does not authorize parallel e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 Parallel functions man
168. ing reactive power into the mains to try to support voltages But if during the fault a reactive power flow towards the system is detected then the system itself should be disconnected from the mains because it is not supporting the mains but rather helps to lower its voltages To recognize the condition in which the reactive power flows from the mains to the system the standard orders to use the positive sequence measurement of current 11 or I and the measurement of positive sequence reactive power Q1 or Q GCU does not use the angle of Q1vector for this protection not mandatory P 1232 P 1234 Q1 gt P 1238 1 0 1 55 A DOF 3036 U12 U23 U31 GCU uses the following formula to calculate Q1 positive sequence reactive power where V1 and I1 are positive sequence voltage and current Parallel functions manual 59 SICES Empowering your control Vil 1 3 x S Q V2 7 p p LV ZI 3 2 8 2 Configuration Valid values O O GC400x O GC400x pa pe ad GC400x GC400x GC400x GC400x GC400x GC400x GC400x Note GC400x GC400x functions and GC400x functions and GC400x and GC400x and GC400x The protection is enabled if e Parameter P 1231 is set to 1 to disable it set it to 0 e lf there is a digital input configured with DIF 2713 function this should be active There are no parameters to configure the reset thresholds They are calculated from trigge
169. ingle line system diagram 9 4 Synchronization With the generic term synchronization two completely distinct operations are actually indicated e The rpm and voltage regulators control to make sure that two three phase voltages have the same frequency the same amplitude and that are in phase with each other the maximum voltage peak L1 of a three phase should be temporally aligned with the maximum voltage peak L1 of the other three phase system e The verification that the difference of voltage frequency and phase between two three phase systems are below the configured thresholds and that the sense of rotation of the two three phase systems is the same obviously this has no sense for single phase systems The purpose of this test is to activate a synchro check signal that enables the closing of the switch that connects the two voltage three phase systems The final purpose of the synchronization process and the closing of a switch that connects together two voltage three phase systems therefore limiting at most the current that circulates in the switch at the time of closing current that increases when amplitude frequency or phase difference increase The closing of the switch should be anyway prevented if the differences in frequency amplitude and phase are too high because damages to the equipment that generates the tensions that are going to be connected to the generator for example could be created GCU is able to manage
170. ion if this input is active and P 0880 parameter is different from 0 the selected mode becomes Transfer to generators It has higher priority than the two previous inputs BASE LOAD mode Note this description does not apply if DROOP mode has been activated Note if a digital input configured with DIF 2095 disable power control function for DST4602x and GC400x or DIF 0058 function for GC500x is active active power modulation is disabled and the rom regulator is controlled as indicated in 5 1 BASE LOAD mode also called fixed power is the simplest GCU allows the operator to set an active power setpoint and uses the PI controller to force the generator to provide that power P 0884 parameter allows setting the desired active power setpoint All GCU allow the modification of this parameter directly on the display page that shows the single line diagram of the system As an alternative to this parameter it is possible to use an analogue input to acquire the setpoint In this case the setpoint cannot be modified from GCU panel P 0884 is ignored any more but it will still be displayed e DST4602x o Obsolete Configure the desired analogue input with AIF 2300 function In this way the conversion of the value acquired by the analogue input in the active power setpoint is performed with P 0882 and P 0883 parameters The setpoint will be configured in P 0882 when the analogue input is at its minimum value 0 it will be the
171. ired Parallel functions Active power distribution Not available Distribution of reactive power Not available Protections for the parallel with mains Available Power modulation in parallel with mains in BASE Available LOAD mode Power modulation in parallel with mains in Available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Available Transfer to the generators function Available DROOP mode Available Further restrictions for the closing of GCB If synchronization for GCB is not enabled or not possible the switch can be closed only if MCB is open Further notes on the sequence MCB switch if controlled by GCU can always be closed If synchronization for MCB is not enabled or not possible the switch can be closed only if GCB is open Normally MCB can be opened only with started engine and only to allow the closing of GCB for the stand alone Supply In manual mode GCU allows the opening of both switches Manual sequence The operator can start stop the generator with START and STOP keys lf GCB switch is controlled by GCU the operator can request its closing under the conditions described above or its opening with GCB key If the closing of the GCB is required e lf GCB can be closed with synchronization by pressing this key the synchronization function will be activated see 5 4 Parallel functions manual 29 SICES Empowering your control e lf GCB canno
172. itch will be newly selected Parallel functions manual 113 SICES Empowering your control 7 Closing before excitation CBE This function is available only for DST4602x This acronym identifies the fast parallel function of DST4602x From a conceptual point of view it consists in closing GCB switches of all generators that have to be connected in parallel even before starting engines so on the parallel bar without tension Then engines are started by removing the control for excitation to alternator when all engines have reached their speed excitation for all alternators is activated at the same time the loading phase intrinsically present in voltage regulators allows alternators to synchronize before voltage reaches the nominal value This function is optional it should be activated by means of an option code The option code has to be requested to SICES SRL by supplying DST4602x ID code hexadecimal code with 12 figures that can be seen at page S 03 of the display and indicated on the back of DST4602x Once received the option code from SICES SRL it should be entered in P 0006 parameter to enable CBE function Refer to the page S 03 of the display at the item Code for options to verify whether the function is active or not e 00 no option e 01 fast parallel CBE function is anyway disabled on a DST4602x if e DST4602x doesn t acquire the rotation speed of engine e DST4602x doesn t acquire the status
173. ke P 0857 value P 0831 1 if the internal reference is 0 minimum speed the analogue output will take P 0857 value if the internal reference is 100 maximum speed the analogue output will take P 0856 value Suggested Use AOF 1001 function to configure the output In this case the scaling between the internal speed reference and the analogue output value should be performed through a conversion curve see GCU technical manual P 0831 P 0856 and P 0857 parameters are ignored e Through two digital outputs UP DOWN This function is not supported by GC400x GCU offers the following functions for the configuration of the digital outputs O DOF 2221 for DST4602x or DOF 0050 for GC500x GCU generates pulses on this output to increase engine speed DOF 2222 for DST4602x or DOF 0051 for GC500x GCU generates pulses on this output to decrease engine speed Parallel functions manual 71 SICES Empowering your control o DOF 2223 for DST4602x or DOF 2223 for GC500x This control is optional and can be used only on rpm regulators which provide for the appropriate input GCU activates this output when it wants to bring engine rom back to rated value Do not configure any output with this function if rom controller does not provide for an own input If you UP DOWN controls are used appropriately configure the following parameters o P 0992 parameter in this parameter it is necessary to set the theoretical ti
174. l Empowering your control It is also possible to configure an output with DOF 0103 function AND OR logics with ST 052 status the output is activated if at least one protection for the parallel with mains has been activated if all protections for the parallel with mains are reset it will be deactivated 3 2 9 27 U lt lt protection Minimum voltage 3 2 5 1 Configuration Valid values P 0908 01 Linked phase voltages Only for 0 1 DST4602x P 0912 Triggering threshold P 0116 110 0 100 0 P 0913 Triggering delay Ps 0 00 60 00 EVT 1091 Triggered protection EVT 1151 Protection reset a for DST4602x functions DOF 0103 AND OR logic with status ST 053 triggered protection P 0908 01 parameter available only on DST4602x and GC400x allows deciding if the protection works on mains linked voltages 0 or on phase voltages 1 For GC500x the protection always acts on linked voltages The protection can be disabled by putting the release delay at 0 00 There are no parameters to configure the reset threshold There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresis see 3 2 2 1 There are no parameters to configure reset delay The delay is 700 ms on DST4602x and GC400x 0 ms on GC500x Note when the protection is triggered the output configured with the AND OR logics ST 053 status can be activated with a delay ranging f
175. lect the desired power reserve level through contacts too GCU provides for this purpose the following functions for the configuration of digital inputs e DIF 2330 it disables the management of the power reserve When this input is active GCU forces parameter P 1207 on 0 which then is passed to the other GCUs deactivating in this way on all generators the power reserve e DIF 2331 it selects the first level of power reserve When this input is active GCU forces the P 1207 parameter to 1 that then is passed to the other GCUs activating in this way on all generators the power reserve on the first level e DIF 2332 as the previous one but for the second power reserve level e DIF 2333 as the previous one but for the third power reserve level In case more inputs are active at the same time that with the code of the highest function wins Moreover GCU allows using its digital outputs to show externally this function status Therefore it provides the following codes for the configuration of the digital outputs e DOF 3180 the output activates to indicate that no power reserve level is selected e DOF 3181 the output activates to indicate that the first power reserve level is selected e DOF 3182 the output activates to indicate that the second power reserve level is selected e DOF 3183 the output activates to indicate that the third power reserve level is selected e DOF 3184 this output acti
176. led and the voltage regulator is controlled as indicated in Errore L origine riferimento non e stata trovata The management in DROOP of the voltage regulator consists in requiring the same voltage regulator a voltage that depends on the currently delivered reactive power kvar according to a curve indeed called DROOP curve It is actually a straight line The next picture shows an example Hz 410 390 0 100 kvar In the previous example the curve provides a no load voltage of 410 Vac and a full load voltage of 390 Vac 48 Hz for the maximum reactive power The DROOP adjustment is used to put two generators in parallel and get a breakdown of active power without plugging in any way the control devices of the two generators between them It should only be used to put in parallel a generator run by a GCU SICES Srl with another generator managed by non SICES Srl devices It makes little sense to use the DROOP adjustment for a generator that supplies in parallel to mains The distribution of active power in DROOP works only if the DROOP curve is identical on all generators 84 Parallel functions manual SICES Empowering your control As the generators which supply in DROOP are not connected to each other in any way the idea is to use the only information in common among them frequency as index of the power to be supplied The limit of reactive power breakdown in DROOP is that it operates at a variable voltage which depend
177. llowing cases e f there are no digital input configured with the function DIF 2716 it enables the load function in SYSTEM BASE LOAD if all gensets are in SYSTEM BASE LOAD mode all of them manage the load function e lf there are is a digital input configured with the function DIF 2716 it enables the load function in SYSTEM BASE LOAD and it is activated if at least one genset is in SYSTEM BASE LOAD the load function then is managed by the gensets in SYSTEM BASE LAOD e If there are no digital input configured with the function DIF 2715 it enables the load function in DROOP if all gensets are in DROOP all of them manage the load function e lf there are is a digital input configured with the function DIF 2715 it enables the load function in DROOP and it is activated if at least one genset is in DROOP the load function then is managed by the gensets in DROOP 118 Parallel functions manual 8 6 1 1 SICES Empowering your control Gensets with load function enabled on the contrary can be automatically stopped one at a time according to appropriate logics if the other generators are enough to supply the load they will be immediately restarted one at a time if the load increases and then more power is required to genseis P 0821 parameter is used to enable the load function on a GCU e P 0821 0 Load function disabled e P 0821 1 Load function enabled In this case it is further possible to utiliz
178. low down because they cannot instantly increase their power to meet the active power requirement of the load they need some time e The tension of the bar tends to decrease temporarily because alternators are not able to instantly increase the supplied current to meet the active power requirement of the load they need some time If instead a big load is removed frequency and voltage tend to increase transiently During these phases SICES Srl s GCUs give a higher priority to the adjustment of voltage and frequency compared to the adjustment of active and reactive power GCU as a matter of fact provides two other parameters known as extended dead band P 0889 for active power and P 0815 for reactive power These parameters should be set to higher values than those used for the normal dead band in this way during transient loading GCU accepts a higher adjustment error and increases the probability of entering the dead band Consequently the percentage of time in which GCUs require rated voltage and frequency to the regulators increases GCU uses P 0889 parameter instead of P 0877 if bar frequency deviates of 0 3 Hz from rated one In the same way it uses P 0815 parameter instead of P 0814 if bar tension deviates of 1 from rated one Loading phases At the time a generator closes its GCB and is in parallel with other generators it is Supplying O kW and O kvar From this moment on it should start to take part of load active a
179. lt Parallel functions manual 109 SICES Empowering your control 9 6 3 4 Supplied power reduction required by contact Some European standards the German one for example require the possibility by the network operator to control the reduction of the power exported by the generator through contacts The standards requires four contacts which should correspond to 100 60 30 and 0 of the rated power of the generator The first contact 100 can be managed as in absence of the other three alternatively it can be managed on DST4602x by configuring a digital input as BASE LOAD Alternative setpoint see 5 6 2 DST4602 manages the 4th contact which requires the supplying of 0 of rated power by configuring a digital input as inhibition to power loading see 2 1 For the remaining two contacts DST4602x provides for two functions for the configuration of the digital inputs DIF 2097 and DIF 2098 The activation of these inputs involves the limitation of the power supplied to the one set by P 0954 and P 0955 parameters both expressed as percentage of the P 0105 rated power The limitation is immediately removed when the digital inputs become non active 9 6 3 5 Stopping of the engine for excessive reduction of supplied power As seen above the power setpoint that the generator should supply when working in parallel with mains may be limited by many conditions It may happen that this setpoint is limited to a
180. ly display the status of the switch e Prevent MCB from closing in case that GCB isn t open e Only if a delay different from zero is set for the digital input that acquires the feedback this delay is utilized as opening closing time limit of the switch itself in this case GCU reports failures of the switch by activating some anomalies Synchronization for GCB Not available Synchronization for MCB Not available Parallel functions PMCB communication bus Not required Active power distribution Not available Distribution of reactive power Not available Protections for the parallel with mains Not available Power modulation in parallel with mains in BASE Not available LOAD mode Power modulation in parallel with mains in Not available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Not available Transfer to the generators function Not available DROOP mode Available Further restrictions for the closing of GCB GCB switch can be closed only when MCB is open GCU prevents its closing when it acknowledges the presence of voltages on both sides of the switch synchronization for GCB is not allowed Further notes on the sequence MCB switch if controlled by GCU can be closed only if GCB switch is open GCU prevents its closing when it acknowledges the presence of voltages on both sides of the switch synchronization for MCB is not allowed Usually it can be opened only with started
181. me s that the rom regulator needs to bring the engine from minimum to maximum speed o P 0993 parameter in this parameter it is necessary to set the time s for pulses there will be only one pulse every P 0993 seconds o P 0994 parameter in this parameter it is necessary to set the minimum duration of the pulse It is a percentage of the time set in P 0993 o P 0995 parameter in this parameter it is necessary to set the minimum duration of the pulse It is a percentage of the time set in P 0993 GCU will generate a single UP or DOWN pulse every P 0993 seconds the output will be activated for a time included between P 0994 and P 0995 of P 0993 based on the frequency error active power P 0992 parameter is used internally to GCU for its management logics it is not necessary for it to be fully precise Normally it is possible to measure it by bringing the engine to minimum speed forcing a fixed DOWN control then by forcing a fixed UP control the time the engine takes to reach full soeed is measured If the digital output is not used to force the engine to rated rom speed GCU should control the speed even when the generator is not in parallel with anything Remember in these cases to correctly set P 0849 and P 0850 parameters for frequency PI controller to allow proper adjustment of speed GCU converts the internal speed reference in a 4 Hz variation compared to the nominal frequency 120 rom compared to rated
182. ment that is not always possible or easier to perform For this reason beside the empirical method we suggest a simplified one that should allows to properly select the relevant parameters PI controllers parameters can also be modified while the system is running even from the operator panel It is advisable to make changes using the BoardPrg3 program available free of charge on SICES Srl s website 4 4 1 Full method 1 Set P at an initial value 0 100 and I at 0000 2 Increase P until the controlled condition starts to oscillate for example if you are adjusting the IP that manages the engine speed during synchronization increase P until 74 Parallel functions manual Empowering your control by ear you start hearing the engine that continually accelerates slows down Decrease increase the value of P until the starting point of the oscillation is singled out a good approximation is enough 3 Measure the period of oscillation the time between two consecutive speed peaks 4 Set P to a slightly lower value than the one obtained by dividing the current value by 2 2 5 Set the I to the calculated value by dividing 1 2 for the oscillation period measured before in seconds It can be set a lower value degrading the performance but increasing stability margin 6 Some other fine tuning might be necessary Verify how the system work with low medium and high load In case there is still an instability of
183. mit of 2 seconds is used Parallel functions Synchronization for GCB Available if P 0854 1 or if P 0854 3 Synchronization for MCB Available if P 0855 1 or if P 0855 3 PMCB communication bus Not required Active power distribution Not available Distribution of reactive power Not available Protections for the parallel with mains Available Power modulation in parallel with mains in BASE Available LOAD mode Power modulation in parallel with mains in Available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Available Transfer to the generators function Available DROOP mode Available Further restrictions for the closing of GCB If synchronization for GCB switch isn t allowed or isn t possible the switch can be closed only if MCB is open Further notes on the sequence MCB switch if controlled by GCU can always be closed If synchronization for MCB is not enabled or not possible the switch can be closed only if GCB is open Normally MCB can be opened only with started engine and only to allow the closing of GCB Parallel functions manual 17 SICES Empowering your control In manual mode GCU allows the opening of both switches Manual sequence The operator can start stop the generator with START and STOP keys lf GCB switch is controlled by GCU the operator can request its closing under the conditions described above or its opening with GCB key If
184. mmunication bus owner of SICES SRL through which all devices share information in order to allow the parallel functions described in this document Power Management Communication Bus RDPs Indicates the reactive power kvar supplied by a generator positive if the load is inductive RDPt Indicates the reactive power kvar supplied by all generators in parallel it is the sum of the related RDPs RESt Difference in kW between the power supplied by generators and the maximum power they would be capable to supply RESin Difference in kW between the power supplied by generators and the maximum power they would be capable to supply in case one of them the lowest priority one comes out from parallel SPM See the description of types of systems par 2 SPtM See the description of types of systems par 2 SPtM SSB See the description of types of systems par 2 SSB See the description of types of systems par 2 par 2 SSB SSTP See the description of types of systems par 2 Parallel functions manual 3 SICES Empowering your control 1 4 References 1 CAN open Cabling and Connector Pin Assignment CIA Draft Recommendation DR 303 1 2 BOSCH CAN Specification Version 2 0 1991 Robert Bosch Gmbh 3 SICES Srl EAAMO380xxXA DST4602 DST4602 P DST4602 Evolution DST4602 P Evolution parameter table 4 SICES Srl EAAMO391xxIT DST4602 DST4602 P DST4602 Evolution DST4602 P
185. mode Available Parallel functions manual 43 SICES Empowering your control Further restrictions for the closing of GCB The switch can be closed only if MCB is closed if it exists also MGCB should be closed and if the status of mains authorizes the parallel lt can therefore be closed only with synchronization Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no inhibition to starting is active and if the status of the mains authorizes the parallel with mains e In TEST and in REMOTE START always ignoring inhibitions to starting DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence W024 early warning is equivalent to a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e The protections for the parallel with mains have been triggered e The status of the mains does not authorize parallel e An inhibition to power load has bee
186. n 0 5 seconds from the triggering of the protection fixed non configurable time if it is not opened GCU activates A275 shutdown interface switch not open and controls the opening of both MCB and GCB to isolate the generator from mains A275 shutdown cannot be disabled in any way GCU controls the opening of the interface switch exactly when the protections for the parallel with mains are triggered but only if at that time the generator is in parallel with mains If for example the interface switch is MCB P 0900 1 but the protections for the parallel with mains are triggered while GCB is open MCB switch will not be opened For the systems that provide for the only production in parallel with mains when the protections are triggered the generator is disconnected from the mains the engine is however kept running to see if the fault on the mains is restored quickly and then production can restart However if mains 68 Parallel functions manual SICES Empowering your control failure lasts longer than the time set by P 0899 parameter GCU will stop the engine it will be restarted later when the fault on the mains is solved The parallel with mains is allowed only after P 0903 seconds from the time the fault on the mains is fixed In particular GCU waits P 0903 seconds before allowing parallel to mains since e All protections for the parallel with mains are restored e DST4602x and GC400x voltages and frequency are withi
187. n activated e In TEST P 0222 parameter is set on 0 The normal AUTOMATIC operation logic if GCU controls GCB switches will be therefore 1 Engine stopped and GCB open If the automatic intervention of the generator is required the procedure goes on from step 2 2 Engine starting wait status before voltage and frequency are within tolerance Then the procedure goes on from step 3 3 GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 8 If there are requests for inhibition to power load the procedure remains at this point If mains does not allow parallel the procedure stays at this step Otherwise it goes on from step 4 4 Closing with synchronization of GCB This phase lasts maximum P 0852 seconds If the switch is closed the procedure goes on from step 5 If GCB isn t closed within the time limit GCU will activate A271 shutdown failed parallel on GCB and the procedure goes on from step 8 5 GCB closed in parallel with mains GCU should calculate the power setpoint for the generator e P 0881 1 BASE LOAD The power setpoint is P 0884 parameter or a value acquired by the analogue inputs 44 Parallel functions manual SICES Empowering your control e P 0881 2 IMPORT EXPORT GCU calculates a power setpoint for the generator so that power exchanged with the mains reaches the required
188. n configured thresholds to allow the parallel see 3 2 1 If this condition is not met GCU displays a message on the status bar to inform the operator see GCU technical manual Parallel functions manual 69 SICES Empowering your control 4 Management of speed and tension regulators To implement all the functions required by the parallel logics described below GCU should be able to vary the frequency and the voltage produced by the generator However GCU is not able to interact directly with engine and alternator electrical technical control devices The generator should therefore be equipped with appropriate electronic control units denominated speed controller and voltage regulator that interact directly with these controls GCU should be connected to these controllers Therefore it requires a certain rotation speed at the rom regulator and a certain voltage at the voltage regulator then the same regulators will act on actual controls to make sure that the engine is running at the required speed and that the alternator supplies the required voltage The logics through which GCU creates the required speed and voltage for the regulators are described in the following chapters This chapter instead explains how to connect GCU to regulators In the rest of the document the term speed reference refers to the speed request created by GCU The term voltage reference refers to the voltage request created by GCU Both refer
189. n input is not active it will not be possible to modify P 0823 parameter because it is immediately rewritten the description present in the following three paragraph cannot be applied DST4602x starting from version 00 48 and GC400x it is possible to activate a digital output to indicate that the genset is selected as master by using AND OR logics with the internal status ST 176 8 6 1 1 1 Manual selection of master generator 1 Manual selection of master generator 1 In this mode it s up to the operator to change the master generator manually by acting on P 0823 parameter 8 6 1 1 2 Selection in rotation of the master generator change at established time 2 In this mode the GCUs provide autonomously to select a new master generator by varying P 0823 parameter once a day P 0824 parameter is used to select the time for the change of the master generator The new master generator will be the one immediately subsequent to the previous one among generators included within the list of priorities In the example at the paragraph 8 6 1 1 after generator 4 generator 6 will be selected as the master one lt is still possible to change manually P 0823 parameter 120 Parallel functions manual Empowering your control 8 6 1 1 3 Selection in rotation of the master generator change every x hours 3 In this mode the GCUs provide autonomously to select a new master generator by varying P 0823 parameter
190. ncy service to mains GCU provides to start the generator if the mains is out of tolerance from the configured time it stops it if mains is within tolerance for the configured time Parallel with mains is not allowed Synchronization for GCB Available Synchronization for MCB Not available PMCB communication bus Required Parallel functions Active power distribution Available Distribution of reactive power Available Protections for the parallel with mains Not available Power modulation in parallel with mains in BASE Not available LOAD mode Power modulation in parallel with mains in Not available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Not available Transfer to the generators function Not available DROOP mode Available Further restrictions for the closing of GCB GCU prevents the closing of GCB and it forces its opening if it acknowledges the status of in parallel with mains MCB closed and MGCB closed or non existing Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no inhibition to starting is activated and if mains is out of tolerance NOTE the load management see 8 6 can activate the inhibition to starting for the generators which should be stopped because not needed to support the load e In TEST and in REMOTE START always ignoring inhibitions to starting
191. nd reactive power up to the condition in which the load is perfectly allocated in percentage among all generators This phase is called loading phase and ends exactly at the instant when the load is allocated With P 0874 parameter P 0125 s it is possible to set the speed at which the generator increases its active power and consequently also reactive power during the loading phase Conventionally values around 1 s are used It is possible to configure a digital output of GCU with DOF 0103 function AND OR logics with ST 100 status the output is activated during the loading phase 9 9 3 Loading phases At the time a generator closes its GCB and is in parallel with other generators it is supplying O kW and O kvar From this moment on it should start to take part of load active and reactive power up to the condition in which the load is perfectly allocated in percentage among all generators This phase is called loading phase and ends exactly at the instant when the load is allocated With P 0874 parameter P 0125 s it is possible to set the speed at which the generator increases its active power and consequently also reactive power during the loading phase Conventionally values around 1 s are used It is possible to configure a digital output of GCU with DOF 0103 function AND OR logics with ST 100 status the output is activated during the loading phase Parallel functions manual 97 SICES Empowering
192. ne can be started only if GCU is not in OFF RESET and if there are no shutdowns deactivations and discharges GCB switch if controlled by GCU can be closed only if the generator is running see notes above and if generator voltages and frequency are within tolerance See additional restrictions for the closing of GCB in the description of individual systems The switch can always be opened DST4602x and GC400x in case the stopping of the engine is required GCU always makes at least one attempt of opening the switch before order its stopping Manual sequence The operator can start stop the generator with START and STOP keys lf GCB switch is controlled by GCU the operator can request its closing under the conditions described above or its opening with GCB key If the closing of the GCB is required e lf GCB can be closed with synchronization presence of voltage on parallel bars by pressing this key the synchronization function will be activated see 5 4 e If GCB can be closed without synchronization not possible for MPtM system GCU controls the direct closing of GCB in case of failure to close it activates W014 early warning If the opening of GCB is required e While the generator is in parallel with mains or with another generator which in its turn is not coming out of the parallel GCU activates gradual power discharge When the power of the generator is lower than the one configured with P 0878 parameter or at l
193. ne whether the parallel with mains is authorized For these reasons normally GCU mains bar sensor is used as mains sensor It is possible but not mandatory to configure a GCU digital input to acquire the status of No voltage on parallel bars DIF 3102 function for DST4602x and GC400x DIF 0050 function for GC500x If this input is not 8 Parallel functions manual SICES Empowering your control available GCU determines the presence of voltage on the parallel bars between GCB and MCB based on the status open closed of the two switches and at the presence of voltage on mains and generator It is anyway possible to use GCU mains bars sensor to measure the voltage on parallel bars although strongly advised against In this case as it is not possible to measure mains voltage directly based on the type of system two different contacts may be required e Status of the mains for emergency service DIF 3101 for DST4602x and GC400x DIF 0060 for GC500x Required for SSB and SSB SSTP systems e Status of protections for the parallel with mains DIF 3103 only for DST4602x DIF 0039 for GC500x Required for SSB SSTP SPtM and SPtM SSB systems Refer to GCU technical manual for the configuration of mains bar sensors and for the configuration of digital inputs Feedback MGCB Systems consisting of a single generator do not require the presence of MGCB switch which is then completely ignored MCB and BTBCU devices Contr
194. ngle panel if it were installed on each panel and the operator selects different level of reserve among the different selector the system wouldn t work Moreover since the selector will steadily activate one of GCUs inputs and therefore a reserve level will be constantly selected the operator will not have the possibility to select a different reserve level from the serial port or from parameters of one of the GCUs 8 6 3 Genset start Usually the load function starts only one genset at a time when the power supplied by the other gensets remains higher than the threshold P 0826 for the time P 0827 The logic is different if starting with a no gensets supplying In this case usually all gensets available are started the load function itself will then stop one at a time all unnecessary gensets For DST4602x starting from the version 00 48 and GC400x the behaviour is different if the load function works on gensets in SYSTEM BASE LOAD or DROOP mode e SYSTEM BASE LOAD the gensets number configured in P 0816 for DST4602x or in P 0820 for GC400x are started e DROOP the gensets number configured in P 0816 for DST4602x or in P 0820 for GC400x are started if there is voltage on the parallel busbars otherwise all gensets are Started 8 6 4 Genset stop The load function commands the stop of one genset when the other gensets are able to supply the load if it is required to stop the genset in anoth
195. nominal voltage GCU uses the P 0815 parameter instead of P 0814 if the bar voltage differentiates by 1 from the nominal 5 5 2 2 Method 2 This method can be used on GC400x if the parameter P 1650 3 is set at 1 In this case GCU controls both voltage and reactive power at the same time With regard to the management of the reactive power refer to the above mentioned With respect to the management of the voltage GCU uses the set point P 1654 see 5 2 2 96 Parallel functions manual Empowering your control The parameter P 1655 establishes if the voltage fault counts more than the reactive power fault By default this parameter is set at 50 in this way the reactive power error equals the voltage one By increasing the value of P 1655 the reactive power error weighs more there will be a better reactive power sharing and a higher voltage error Instead by decreasing the P 1655 value the voltage error weighs more there will be a better nominal voltage control in spite of the accuracy on the reactive power sharing When you use this method GCU ignores the dead band parameters Note there is only a regulation PID the parameters that configure it are P 0811 and P 0812 P 0989 and P 0990 are not used in this situation Load transients When a big load is applied with active and reactive component to the parallel bar e The frequency of the bar tends to decrease transiently the engines as a matter of fact tend to s
196. ns It s possible to indicate by means of P 0854 and P 0855 parameters whether synchronization should be used for closing MCB for GCB switch or for both of them it should be usable on at least one switch Main status Mains status is fundamental for this kind of system since it is an emergency system and it should be obtained from GCU It is used to activate the automatic intervention of the generator for the emergency service but also to allow or not the parallel with mains Refer 2 4 to notes on the mains sensor MCB command P 0855 parameter allows the configuration of the way GCU has to manage the switch e P 0855 0 MCB controlled by GCU synchronization not available e P 0855 1 MCB controlled by GCU synchronization available e P 0855 2 MCB controlled externally synchronization not available e DST4602x and GC400x P 0855 3 MCB controlled externally synchronization not available On GC500x value 3 is not available instead value 2 is used If synchronization is required and MCB switch is controlled externally a digital input for requiring the synchronization activation should exist function DIF 1034 for DST4602x and GC400x DIF 0052 for GC500x The MCB key of the GCU panel or the combination of keys SHIFT GCB on GC500 GC500Plus and GC400x can be used in MAN to open and close the switch if controlled by GCU Feedback MCB Use DIF 3002 DST4602x and GC400x or DIF 0006 functions for G
197. o e lf the nominal voltages of the two generators are different GCU does not work on Vac voltages but converts then to percentage of rated ones Then it adjusts generator voltage to ensure that the percentage measures coincide 9 4 8 Display page for synchronization See GCU technical manuals for the description of the display page dedicated to synchronization 5 5 Supply in parallel with other generators Note this description does not apply if DROOP mode has been activated Note if a digital input configured with disable power control DIF 2095 for DST4602x and GC400x or DIF 0058 for GC500x functions is active the distribution of the active power is disabled and the rom regulator is controlled as indicated in 5 1 GCUs manage the distribution of active and reactive power when multiple generators controlled by GCUs by SICES Srl are in parallel stand alone among them These operations are possible thanks to the information the GCUs exchange through SICES Srl PMCB network Each GCU transmits to PMCB e Its status e The supplied active power in kW ADPs e The supplied active power in kvar RDPs e The engine rated power in kW MDPs With this information each GCU is able to calculate e The active power required by the load in kW ADPt sum of ADPs of GCUs e The reactive power required by the load in kvar RDPt sum of RDPs of GCUs e The rated power of supplying generators in kW RDPt sum of ADPs of GCUs e Lo
198. o request more or less active power when the generator is in parallel with the mains or with another generator 5 2 Supply in non parallel mode This description is applied when the genset is not in parallel neither with the mains nor with other gensets and if the DROOP mode is not activated otherwise see 0 In these conditions the controller doesn t need any power regulation neither active nor reactive because it is set by the load connected to the genset Generally the genset has to maintain constant frequency and voltage and the values desired in any load condition Usually this is the function of rem and voltage regulators they accept a frequency or voltage setpoint and regulate the fuel flow or the excitation current to maintain the real voltage and frequency equal to the setpoint 78 Parallel functions manual 9 2 1 9 2 2 SICES Empowering your control In this phase GCU has no need to change the setpoint for the rpm and voltage regulators usually GCU commands correspond to what has been set with the fine tuning procedure Therefore generally no Pl regulator is active except when UP DOWN commands are used for the rom and voltage regulators With GC400x there is the possibility to enable the PI regulators in this phase too This possibility is optional and must be specifically requested through parameters see the following paragraphs It is possible to configure a digital output with the
199. o a potentiometer on the panel By using an analogue input the P 1604 parameter is no longer used and it s not possible to change the frequency set point on GCU Anyhow on the display page dedicated to the synchronization GCU shows the frequency set point value acquired by the analogue input The analogue input must be configured using the function AIF 2111 In this case the conversion between the value acquired by the analogue input and the frequency set point is carried out through a conversion curve see user s manual Note the frequency set point acquired by an analogue input is not shared among all the GCU connected on the CanBus PMCB The parameters that configure the Pl regulator for the frequency regulation are P 0977 and P 0978 By setting them at zero the Pl regulator is disabled See 4 for the configuration of these two parameters The frequency control even if it is disabled does not work with engine stopped or during the engine start operations lt starts working after P 1602 seconds since the frequency or the engine rounding have overpassed the P 1061 percentage value with respect to the nominal one Additionally GCU follows the frequency set point variation with a ramp which is configurable using the P 1603 parameter Voltage regulation This description is valid for GC400x only The PID for the frequency regulation must be clearly enabled e P 1650 0 it enables the voltage control when GCB is open
200. o their severity and based on the actions GCU performs to manage them e Warning This term is used to indicate an anomaly that under the circumstances doesn t compromise the working of the generator the operator should anyway take note of it because sooner or later it could worsen in a more serious anomaly e Discharge This term is used to indicate an anomaly that requires the stop of generator There aren t immediate risks either for the generator or for users The intervention sequence IS Parallel functions manual 1 SICES Empowering your control O If the generator is connected in parallel with another generator or with mains GCU will provide to reduce gradually to zero the power supplied by the generator Then it opens the generator switch GCB and if necessary closes the mains switch MCB where provided if it is not already closed The engine is kept running for a configurable time without load to allow its cooling cooling cycle In the end GCU stops the engine e Deactivation This term is used to indicate an anomaly that requires the stop of generator aren t immediate risks for generator but there are potential risks for users that therefore have to be disconnected immediately from generator The intervention sequence There IS O O O GCU immediately opens the generator switch GCB regardless the power supplied in that moment If necessary it closes mains switch MCB where provided
201. of failure to closing D014 deactivation is activated GCB not closed and it goes on from step 16 If the switch is closed the procedure goes on from step 13 13 MCB open GCB closed Parallel functions manual 21 SICES Empowering your control In case of shutdowns discharges or deactivations the procedure goes on from step 15 If there are requests for inhibition to power load or if automatic intervention of the generator is no longer required the procedure goes on from e Step 14 if the closing with synchronization of MCB is allowed P 0855 and possible a gap on users is avoided e Step 15 in other cases In case all the following conditions are met the procedure goes on from step 14 to set the generator in parallel with the mains again e Automatic intervention of the generator is still required e Continuative parallel to the mains is allowed P 0880 gt 0 e Mains status authorizes parallel e The request for transfer to generators has not been activated DIF 2096 e The closing with synchronization of MCB is allowed P 0855 and it s possible e W272 early warning isn t activated 14 Closing of MCB with synchronization This phase lasts maximum P 0853 seconds If the switch is closed the procedure goes on from step 5 If MCB isn t closed within the time limit GCU activates W272 early warning failure to parallel on MCB If P 0221 parameter is set to 2 this early warning becomes a request for a
202. of the generator is required under the following conditions e In AUTO if no inhibition to starting is activated and if mains is out of tolerance e In TEST and in REMOTE START always ignoring inhibitions to starting By setting P 0221 parameter to a value different from 0 GCU will be configured to keep generator in supplying phase in case of failure failure to closing of MCB switch if there aren t shutdowns deactivations and discharges In this case the presence W013 early warning is equivalent to a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence W024 early warning is equivalent to a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning With the engine in action GCU has to decide whether closing or not GCB switch GCB switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 MCB switch should be closed when GCB is open T
203. of the switch Synchronization for GCB Not available Synchronization for MCB Not available Parallel functions PMCB communication bus Not required Active power distribution Not available Distribution of reactive power Not available Protections for the parallel with mains Not available Power modulation in parallel with mains in BASE Not available LOAD mode Power modulation in parallel with mains in Not available IMPORT EXPORT mode Adjusting of the power factor in parallel with mains Not available Transfer to the generators function Not available DROOP mode Available Further restrictions for the closing of GCB GCU prevents the closing of GCB switch if it acknowledges the presence of voltage on both sides of the switch synchronization is not allowed for this type of system Manual sequence The operator can start stop the generator with START and STOP keys If GCB switch is controlled by GCU the operator can request its closing under the conditions described above or its opening with GCB key If a delay for the digital inout that acquires the switch feedback has been configured GCU activates e W014 early warning in case of failed closing e W024 early warning in case of failed opening 10 Parallel functions manual Empowering your control Automatic sequence The automatic intervention of the generator is required under the following conditions e In AUTO if no starting inhibition
204. ol devices of mains and connectors are not managed for the systems consisting in a single generator if a MCU is connected to a GCU configured with a single type of system GCU activates A273 shutdown inconsistent parameters Sequence The engine can be started only if GCU is not in OFF RESET and if active shutdowns deactivations and discharges are not present GCB switch if controlled by GCU can be closed only if the generator is running see notes above and if generator voltages and frequency of the are within tolerance See additional restrictions for the closing of GCB switch in the description of individual systems The switch can always be opened DST4602x and GC400x in case the stopping of the engine is required GCU always makes at least one attempt of opening the switch before order its stopping 2 4 1 SPM Single Prime Mover Stand alone single system See notes in 2 4 that applies to this system too This is a stand alone production system It is the classic generator for building sites where the operator decides when the generators should supply and when not Parallel with mains is not allowed Therefore it is never possible to perform the power discharge of the generator before opening the GCB switch discharge anomalies therefore behave like deactivations Main status The status of the power mains Is ignored for this type of system At any rate if mains is connected and GCU has been properly
205. ombination with a lower number of generators would be privileged let s suppose that there are three generators a 100 kW a 200 kW and a 300kW generator if the load were 250 kW the 300kW generator would be started and not the couple 100 200 P 0826 and P 0828 thresholds are anyway used to select the best combination of generators P 0827 and P 0829 delays are anyway used before changing the combination of generators needed to supply the load P 0816 parameter DST4602x or P 0820 parameter GC400x allows deciding whether it is possible or not to turn off all generators with the load function enabled if all generators with the load function disabled are able to supply the load e P 0816 0 all generators with the load function enabled can be turned off e P 0816 gt 0 at least one generator with the load function enabled should stay in action 8 6 1 3 Optimization of generators minimum number This mode is available only on DST4602x and GC400x This mode is selected with the value 7 in P 0822 parameter This mode assures that the minimum number of generators that can supply the load is started That independently from the master generator and from the addresses of the GCUs This function works with a maximum of five generators included in the load function First of all the function evaluates whether a single generator is able to support the load starting evaluating them from the less powerful to the most powerf
206. on when this input is active GCU performs the synchronization procedure if it Can Use of the internal synchronizer See 5 4 5 Use of an external synchronizer GCU is not able to directly manage the external synchronizers provided with UP DOWN controls It is necessary to e Use a DIPOT external module produced by SICES Srl to convert UP DOWN controls into an analogue signal then to be managed as described below e Only for DST4602x by using the Digital Potentiometer provided by the internal PLC to convert UP DOWN controls into an analogue value This value should be memorized into a virtual analogue input to be managed as indicated below GCU is instead able to manage the external synchronizers that provide an analogue control for the rem regulator This control should be connected to a GCU analogue input which will transmit the control received from the external synchronizer to rom regulator during synchronization NOTE GCU allows the acquisition of an external signal during synchronization to control the rom regulator not to control the voltage regulator Configuration to use an external analogue synchronizer e DST4602x o Obsolete Configure the desired analogue input with AIF 2106 function or AIF 2102 function if the external synchronizer is used both for GCB and MCB In this way the scaling of the value acquired by the analogue input is performed with P 0835 and P 0836 parameters When the analogue input takes the v
207. on DIF 2714 The set point is established by the parameter P 0974 if all the digital inputs configured with the DIF 2714 function are in stand by e GC400x Configure the analogue input with AlF 2305 function In this way the conversion of the value acquired by the analogue input in no load frequency is performed by a conversion curve see technical manual It is possible to use another digital input to decide if using the analogue input or the parameter P 0974 to set the no load frequency That input will be configured with the function DIF 2714 The possibilities are o If no analogue input is configured with the AIF 2305 function the set point is established by the parameter P 0974 o If there is an analogue input configured with the AIF 2305 function The set point is established by the analogue input if there are no digital input configured with the function DIF 2714 The set point is established by the analogue input if there is at least one digital input configured with the function DIF 2714 The set point is established by the parameter P 0974 if all the digital inputs configured with the DIF 2714 function are in stand by e GC500x o Obsolete It is necessary to select an analogue input through P 0971 parameter any value other than 0 and 7 In this case there is no need to configure anything in the parameters related to the selected analogue input and P 0972 and P 0973 parameters are used for scaling th
208. onization available If an incorrect value is set GCU activates A273 alarm inconsistent parameters If GCB is controlled externally DST4602x and GC400x a digital input to request the activation of the synchronization DIF 1004 function should exist GCB key on the panel can be used in MAN to open and close the switch if the switch is controlled by GCU Feedback GCB Use DIF 3001 DST4602x and GC400x or DIF 0007 functions for GC500x to configure the input that acquires the feedback As it is a parallel system it is mandatory to connect the feedback of GCB switch GCU uses it to e Correctly display the status of the switch e Recognize the condition of parallel with other sets and activate active and reactive power management functions e For MSB MSTP MPtM and MPtM MSB systems GCU recognizes the status of in parallel with mains and activates all active and reactive power management functions It also manages the status of protections for the parallel with mains in order to open GCB if they are triggered as interface device or in case as backup device Parallel functions manual SICES Empowering your control e Being a parallel system failures to open of close GCB are always managed Sets a delay different from zero for the digital input that acquires the feedback this delay is used as the opening closing time limit of the switch otherwise a time limit of 2 seconds is used Sequence The engi
209. open If the automatic intervention of the generator is required the procedure goes on from step 2 2 Engine starting wait status before voltage and frequency are within tolerance Then the procedure goes on from step 3 3 GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 11 If there are requests for inhibition to power load the procedure remains at this point Otherwise it goes on from e Step 6 if there is voltage on the parallel bars of the generators e From step 4 if there is no voltage on parallel bars and if GCU diagnostics that there are no other supplying generators and that no network is connected to the parallel bars e t stays at this point if there is no voltage on the parallel bars but GCU diagnostics that there are other supplying generators or that at least one network is connected to the parallel bars It is an anomalous situation linked to a wiring error DST4602x and GC400x reports this situation by activating W279 early warning Inconsistent bar voltages If the situation persists for 60 seconds the anomaly becomes a deactivation D279 thus causing the shutdown of the generator 4 Closing of GCB without synchronization three attempts In case of failure to close D014 deactivation is activated GCB not closed and the procedure goes on from step 11 for GC500x it is a shutdown Otherwis
210. ow the controller a minimum regulation capability compatible with the system A very small value of I 0 01 can be used with minimal effect on the procedure Parallel functions manual 75 SICES Empowering your control 5 Supply mode This chapter describes the actions of GCU on voltage regulators and speed controls based on the type of system the status of the engine and to the status of the switches For each function parameters and functions used for the configuration of the inputs and outputs are described 9 1 Fine tuning 9 1 1 Fine tuning of frequency As already described in 4 it is possible to adjust the engine rotation speed and consequenily the frequency of the alternator by acting on GCU instead of on the rpm regulator The adjustment made in this way fine tuning will be used as a basic control for the rom regulator the starting point for the various Pl regulators which are used in the logics described as follows With all the controllers except for GC400x when the genset works in isochronous and it is not in parallel with neither mains nor other gensets the command that is sent to the rom regulator is equal to the fine tuning value In these conditions indeed no phase regulation is required as during the synchronisation as well as the active power set by the load The frequency regulation is managed by the rom regulator that will increase decrease the fuel flow to the engine in order to gu
211. ower of the generators in parallel is sufficient to supply these users To configure this function GCU puts P 0806 parameter at disposal that allows setting approximately the power required by the loads This parameter is automatically shared by all GCUs connected to PMCB network it is enough to change it on a GCU and it will be automatically transmitted to all the others 38 Parallel functions manual SICES Empowering your control GCU also provides a function for the configuration of the digital inouts DIF 2181 for DST4602x and GC400x DIF 0070 for GC500x called immediate supply If the input configured in this way has been activated each GCU controls the switching of the users to the parallel bars as soon as the first generator has closed its GCB therefore ignoring the settings of P 0806 If the input has not been activated or does not exist each GCU controls the switching of the users to the parallel bars when the rating power of all generators with closed GCB is higher than P 0806 or when there are no generators available with open GCB The operational logic is therefore 1 Let s start from a condition with all stopped generators GTS switch will be open while MTS switch if any will be closed Generators start and one of them closes its GCB switch If the digital input has been activated requiring immediate supply the procedure goes on from step 4 GCUs go on with the closing of GCB switches Each time
212. puts DIF 3005 function at disposal to configure a digital output to get the feedback of the contactor GCU considers that the remote control switch is closed when this input is active 6 1 Simplified management With the simplified management the contactor is always closed with the engine in motion when generator voltage and frequency are within tolerance It is immediately opened when the generator is in parallel with mains and is immediately closed as soon as the parallel with mains ends Since as a rule the generator voltage is used to excite NECB remote control switch coil GCU controls the opening of NECB at the beginning of the stopping cycle to prevent the remote control switch from trill when the generator voltage starts to decrease 6 2 Complete management The complete management also controls parallel among generators when more generators are in parallel among them stand alone the neutral of the parallel bar should be earthed in a single point Moreover also early warnings of failure to open and failure to close the remote control switch are now managed It is not essential to acquire feedback from the remote control switch but if acquired GCU uses it to e Activate W204 failure to close NECB and W205 failure to open NECB early warnings In this case the delay associated with the selected digital input is used as a time out to activate the early warnings e During stand alone parallel between multiple generators G
213. r DST4602x or DOF 0037 for GC500x functions GCU activates the output if voltage is present on parallel bars It is also possible to configure an output with DOF 0103 function AND OR logics with ST 048 status the output is activated if the voltage is present on parallel bars 9 4 3 Synchronization for GCB GCU is able to manage synchronization for GCB for all kinds of systems with the exception of SPM and SSB systems It should be explicitly enabled with P 0854 parameter value 1 or 3 To manage synchronization internally for the closing of GCB GCU should have voltages on both sides of the switch i e the voltage of the generator and the voltage on the parallel bars GCU has always the voltages of the generator at disposal If GCU mains bars sensor is used to measure parallel bars voltages P 0126 0 GCU has the voltages it needs at disposal and it is therefore able to internally manage synchronization If instead GCU mains bars sensor is used to measure mains voltages P 0126 1 GCU does not acquire the voltages directly on parallel bars and therefore it would not be able to manage synchronization internally If this situation occurs for a system composed of a single generator SSB SSTP or SPtM SPtM SSB other generators that supply voltage to parallel bars cannot exist In this case if MCB is closed mains voltage is the voltage of the parallel bars GCU is then able to internally manage synchronization In any case i
214. r devices They will have to provide output contacts to be connected to GCU digital inputs that indicate the status of the mains Depending on the type of system two different connections could be required o Status of the mains for emergency service DIF 3101 for DST4602x and GC400x DIF 0060 for GC500x Required for MSB and MSB MSTP systems o Status of the protections for the parallel with mains DIF 3103 for DST4602x and GC400x DIF 0039 for GC500x Required for MSB MSTP MPtM and MPtM MSB systems It is anyway possible to use mains sensor GCU bars as mains sensor In this case it is however necessary to e Use an external synchronizer to close GCB both for controlling speed voltage and to consent closing e Use a digital input of GCU to acquire the status of No voltage on parallel bars DIF 3102 for DST4602x and GC400x DIF 0050 for GC500x Refer to GCU technical manual for the configuration of mains sensor bars and for the configuration of digital inputs MCB command for these systems GCU never controls MCB switch which should always be controlled externally The possible values for P 0855 parameter are e P 0855 0 Incorrect value for this type of system e P 0855 1 Incorrect value for this type of system e P 0855 2 MCB controlled externally synchronization not available e DST4602x and GC400x P 0855 3 MCB controlled externally synchronization not available Parallel functions manual 31
215. ransferred to GCUs through PMCB network The actual power setpoints for the generator therefore varies depending on the power absorbed by local users It may happen therefore that the required power is very low the generators are not designed to work long hours with low power and so this is a situation that should be avoided GCU offers P 0904 parameter that allows setting a minimum power value the generator should supply regardless of the requirements of the power setpoint on the interchange point with mains In short if Parallel functions manual SICES Empowering your control the power required for the generator is lower than P 0904 the generator anyway supplies what specified in P 0904 although this could mean an unwanted power export to mains 5 6 2 4 SYSTEM BASE LOAD mode Note this description is only suitable for DST4602x starting from rev 00 48 and for GC400x Note this description is not valid with DROOP mode Note if a digital input is configured with the function DIF 2095 power control desabled the adjustment of the active power is disabled and the round regulator is commanded as indicated in 9 1 Note if a digital input is configured as LOCAL BASE LOAD DIF 2099 the controller works in BASE LOAD The mode SYSTEM BASE LOAD also called steady power is similar to the BASE LOAD mode described above The difference is that the operator selects a reference for the total power f
216. re remains at this point Otherwise it goes on from Parallel functions manual 35 SICES Empowering your control e Step 6 if there is voltage on the parallel bars of the generators e Step 4 if there is no voltage on the parallel bars and if there are other supplying sets from information acquired by PMCB network e t stays at this point if there is no voltage on the parallel bars but there are other supplying generators from information acquired by the PMCB network It is an anomalous situation linked to a wiring error DST4602x and GC400x reports this situation by activating W279 early warning Inconsistent bar voltages If the situation persists for 60 seconds the anomaly becomes a deactivation D279 thus causing the shutdown of the generator 4 Closing of GCB without synchronization three attempts In case of failure to close D014 deactivation is activated GCB not closed and the procedure goes on from step 10 for GC500 GC500Plus it is a shutdown Otherwise the procedure goes on from step 5 5 GCB closed not in parallel with other generators If GCU realizes that it is in parallel with other generators the procedure goes on from step 7 In the case of shutdowns discharges or deactivations or if there are requests for inhibition to power load the procedure goes on from step 9 If you the automatic triggering of the generator is no longer required the procedure goes on from step 9 6 Closing with sync
217. ring thresholds and from hysteresis see 3 2 2 1 and following paragraphs See GCU technical manual for the determination of rated reactive power and rated current 60 Parallel functions manual Empowering your control P 0908 04 parameter allows deciding whether the protection works on mains linked voltages 0 or on phase voltages 1 With P 1232 parameter it is possible to select the sign that the reactive power should have as measured by GCU for the triggering of the protection negative 0 or positive 1 As a rule it should be negative Note when the protection is triggered the output configured with AND OR logics status ST 051 can be activated with a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 and with reference to the outputs configured with DOF 3035 and DOF 3036 functions It is preferable to use those outputs to control the opening of the switches 3 2 8 3 Description of operations See the common notes in 3 2 4 The protection intervenes if all the following conditions are met e All mains voltages become lower of the triggering threshold and remain below the reset threshold e 11 current becomes higher than the triggering threshold and remains above the reset threshold e Q1 reactive power has the sign selected with P 1232 and becomes bigger in absolute terms than the triggering threshold and remains above the reset threshold If the above conditions for the triggering
218. roller or to a congenital instability of the system The default value for this parameter is 0 which correspond to disabling this function On all GCUs it is possible to configure a digital output with DOF 0103 function AND OR logics with ST 102 status the output is activated when the generator is in parallel with mains DST4602x and GC400x can use a digital output to report that it is in parallel with mains Configure the output with DOF 3096 function 9 6 1 Power factor adjustment Note this description does not apply if DROOP mode has been activated Note if there is an active digital input configured with DIF 2095 disable power control for DST4602x and GC400x or DIF 0058 functions for GC500x the power factor regulator adjustment is disabled and the rom regulator is controlled as shown in 5 1 During the supplying in parallel with mains GCU manages a power factor setpoint not a reactive power setpoint In this way the actual reactive power internal setpoint is automatically adapted to supplied active power There are three different modes for the management of the setpoint depending on the value set in P 0880 e 0 inthis case the continuous parallel with the mains is not allowed e 1 BASE LOAD or 2 IMPORT EXPORT e 4 SYSTEM BASE LOAD only for DST4602x and GC400x 100 Parallel functions manual 9 6 1 1 SICES Empowering your control BASE LOAD or IMPORT EXPORT modes P 0894 parameter allows setting
219. rom O to 10 ms compared to the outputs described in 3 2 4 2 It is preferable to use those outputs to control the opening of the switches 3 2 5 2 Description of operations See diagram 3 2 3 1 See the common notes in 3 2 4 The protection is triggered when at least one mains voltage is below the triggering threshold consecutively for the triggering delay The protection is restored when all mains voltages are above reset threshold consecutively for the reset delay 3 2 6 27 U lt lt protection Minimum voltage This protection is available only for DST4602 3 2 6 1 Configuration Valid values P 0908 02 Linked phase voltages Only for 0 1 DST4602x Parallel functions manual 55 SICES Empowering your control DST4602x DST4602x EVT 1100 Triggered protection Only for DST4602x EVT 1160 Protection reset Only for DST4602x functions DST4602x P 0908 02 parameter allows deciding whether the protection works on mains linked voltages 0 or on phase voltages 1 The protection can be disabled by setting the triggering delay to 0 0 There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresis see 3 2 2 1 There are no parameters to configure reset delay The delay is 700 ms on DST4602x and GC400x 0 ms on GC500x Note when the protection is triggered the output configured with the AND OR logics ST 059 status can be activated wi
220. ry likely The same could happen also with the voltage regulator in this case the machine could supply with a too low power factor both in capacitive and in inductive status By setting P 0991 parameter to 1 GCU acknowledges these conditions and before any protections are activated disables the DROOP mode and switches to BASE LOAD mode In detail e For voltage DROOP GCU switches to BASE LOAD by imposing an imported reactive power corresponding to 70 of P 0321 threshold if the load is capacitive and the imported reactive power is higher than 80 of the threshold for the loss of excitation protection P 0321 It comes back to DROOP mode if the load is inductive or if it is capacitive but if imported reactive power Is lower than 70 of P 0321 threshold e For the frequency DROOP o GCU switches to BASE LOAD mode setpoint 0 kW if the active power is negative and higher in absolute terms than 2 of rated one P 0125 It comes back to droop MODE when the active power becomes positive 86 Parallel functions manual SICES Empowering your control o GCU switches to BASE LOAD mode setpoint 100 of P 0125 if the active power is higher than 102 of rated one P 0125 It come back to DROOP mode when the active power returns below 100 of rated one In case GCU activates this limitation mode it shows a symbol lt or gt besides the no load frequency or no load voltage setpoint on the page that shows the s
221. s but a Slightly greater error in the distribution of power is allowed A value of 0 1 for P 0877 is an acceptable compromise The following diagram shows the operation 94 Parallel functions manual SICES Empowering your control Speed offset Power feedback Dead Band When a big load kW is applied to the parallel bar the bar frequency tends to decrease the engines in fact tend to slow because they don t manage to increase their power immediately to face the active power load requirement they need some time If a big load is removed the frequency tends to increase temporarily During these phases SICES GCUs gives higher priority to the frequency regulation more than to the active power regulation GCU indeed provides another parameter called extended dead band P 0889 for the active power This parameter must be configured at a higher value than the one used for the normal dead band in this way during the load transfer GCU accepts a higher regulation fault and increases the possibility to enter in dead band Consequently there is an increase also in the time percentage in which GCU require the nominal frequency GCU uses the P 0889 parameter instead of P 0877 if the bar frequency differentiates by 0 3 Hz from the nominal 5 5 1 2 Method 2 This method can be used on GC400x if the parameter P 1600 3 is set at 1 In this case GCU controls both frequency and active power at the same time With re
222. s see 3 2 2 2 There are no parameters to configure reset delay The delay is 700 ms on DST4602x and GC400x 0 ms on GC500x Note when the protection is triggered the output configured with the AND OR logics ST 056 status can be activated with a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 lt is preferable to use those outputs to control the opening of the switches 3 2 13 2 Description of operations See diagram 3 2 3 2 See the common notes in 3 2 4 The protection is triggered when mains frequency is above the triggering threshold consecutively for the triggering delay The protection is reset when the mains frequency is below the reset threshold consecutively for the reset delay 3 2 14 81 f gt Maximum frequency This protection is available only for DST4602x 3 2 14 1 Configuration Valid values GC400x GC400x GC400x GC400x functions Parallel functions manual 65 SICES Empowering your control DOF 0103 AND OR logic with status ST 062 triggered protection The protection can be disabled by setting the triggering delay to 0 0 There are no parameters to configure the reset threshold It is calculated from the triggering threshold and from hysteresis see 3 2 2 2 There are no parameters to configure reset delay The delay is 700 ms Note when the protection is triggered the output configured with the AND OR logics ST 062 status can be activated with
223. s both on the total reactive load and on the number of machines in parallel See 5 3 1 for an example of management in DROOP the example is for the frequency DROOP but it is also valid for the voltage DROOP if voltage instead of frequency and reactive power instead of active power are used Conversely to frequency DROOP in the voltage DROOP the curve extends also above no load voltage Looking at the picture above in fact the generator will be at 410 Vac O kvar will decrease to 390Vac for maximum inductive reactive load exported reactive power but will rise above 410 Vac in case of capacitive reactive load imported reactive power There are two different managements for voltage DROOP DROOP managed directly by the voltage regulator On voltage regulators normally this mode is activated through a trimmer if set to O it disables the DROOP The trimmer adjusts the curve slope of the DROOP On GCU it is not necessary to do anything and indeed GCU does not even know that the DROOP mode has been activated DROOP managed by GCU If the DROOP should be managed by GCU it should be specifically requested with a digital input configured with DIF 2094 function for DST4602x and GC400x or DIF 0061 for GC500x When the input is activated the DROOP mode is active if GCB is closed GCU defines the curve for the voltage DROOP with two values the working voltage when the generator is without reactive load no load voltage and the slop
224. s on from step 9 If in the meantime shutdowns or disconnections have been triggered the procedure goes on directly from step 9 If GCU realizes it is no longer in parallel with other generators or that all the generators are coming out of parallel the procedure goes on from step 9 9 Opening of GCB three attempts if the GCB is opened the procedure goes on from step 3 If GCB is not opened e GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 10 e DST4602x and GC400x GCU triggers W024 early warning GCB not open If P 0243 parameter is set to 1 this early warning becomes a request for automatic intervention until the operator recognizes the early warning If there are shutdowns discharges and deactivations the procedure goes on from step 10 otherwise it goes on from step 5 or from step 7 based on the fact that there are other supplying sets 10 Engine stop 36 Parallel functions manual SICES Empowering your control Connection of users to parallel bars For this type of system which does not provide for a parallel with mains the GCUs controlling the generators are also capable of controlling a switch that connects the load to the parallel bar See description in 2 5 2 2 5 2 MSB Multiple Stand By Emergency multiple system See notes in 2 5 that applies to this system too This type of system provides for one or more generators that perform the emerge
225. s on the triggering threshold The reset threshold then it corresponds to the triggering threshold There are no parameters to configure reset delay The delay is 700 ms on DST4602x and GC400x 0 ms on GC500x Note when the protection is triggered the output configured with the AND OR logics ST 057 status can be activated with a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 lt is preferable to use those outputs to control the opening of the switches 66 Parallel functions manual SICES Empowering your control 3 2 15 2 Description of operations See the common notes in 3 2 4 The protection is triggered when e The sign of the measure Af At is compatible with what configured with P 0931 parameter e The measure Af At is higher in absolute terms than the triggering threshold e The two previous conditions are verified consecutively for the triggering delay The protection is reset when e The sign of the measure Af At is not compatible with what configured with P 0931 parameter e The measure Af At is lower in absolute terms than the reset threshold e The two previous conditions are verified consecutively for the reset delay 3 2 16 78 protection Vector surge This protection applies a particular magnetic effect on the alternator taking place exactly when a fault occurs on the mains The graph below shows this effect 15 1 0 5 0 dl A F 0 50 100 150 200 250 300 350 400
226. seceesecnsecenesensecnseceeesenseonseseeesenseoes 114 8 PMCB communication digital DUS cccssecseseeeseeeeeeeeeneeeeseeeeseeeeseeeeneeeeneess 116 oT O A etek cence cue edema AE AEA EAE aAA e eE AA 116 6 2 OyYNCMONZAUOM Of CLOCKS usina EEEE EE 117 8 3 Propagation of parameters ccooccoconccocccocnoconcconnnnnnonancnnnnonnnonanonnnnnnnnnnancnnnnnnons 117 8 4 Authorizations for the closing of GCB oocccoccccncnccncnccncncnncnconcncnncnonncncnnnnconcnonnnos 117 iv Parallel functions manual SICES Empowering your control eo Alone IM Case Or CS MOK ONG terceras ada 118 8 6 Load ManagGeMen cccccccccseccceeeeceececeeeeceeeeceeeeseueeseeceseeeseueeseueesseeesneesaes 118 8 61 L d FUNCUO Munro 118 8 6 2 Power reserve 0 cccccccccccccecececececececenececececeseneseaeneneaeaeaeaeaeaeaeaeaeaeaeaeaeaeaeaeneas 122 8 6 3 Genset SLAM riscvicescdevccevesevecescsenesevndesoces ese secnvedabenecese seuss ndevesixeseseceseberesexnestads 124 E A 124 8 7 Devices on network PMCB 0oococccoccncncncocononenencncncononenenonnnnnnonenennnnnannnneneneninancns 124 8 7 1 MOU devices ocio 125 8 7 2 BIBCU devices cocococcncncncncononononnnnn nono rene ne nea nannnnen 125 Parallel functions manual Y SICES Empowering your control Index A DIF 2093 cooocncnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnonnnnnnoninnnnnss 105 DIF 2094 ee 89 91 AIF 2100 ccccccccccccccccccccccccceceececeeeeeeseeeueeeeeeeeeeess 85 DIF 2095 n 87
227. see G2 still requires an higher frequency than G1 this again causes a load transfer from G1 to G2 Let s suppose that additional 10 kW are transferred to G2 e At this point there is Parallel functions manual 81 SICES Empowering your control o G1 30 kW 30 of rated one It should work at 50 8 Hz o G2 50 kW 25 of rated one It should work at 51 0 Hz Both generators try to control the frequency as required by the load As you can see G2 still requires an higher frequency than G1 this again causes a load transfer from G1 to G2 e Inthe long term the two generators will have a load that requires the same frequency o G1 26 66 kW 26 66 of rated one It should work at 50 9333 Hz o G2 53 33 kW 26 66 of rated one It should work at 50 9333 Hz As you can see the system settles down with a breakdown of the correct percentage of power to the prejudice of frequency The limit of the breakdown of active power in DROOP is as a matter of fact that it operates at a variable frequency which depends both on the total load and on the number of machines in parallel Two different managements for the frequency DROOP are available DROOP managed directly by the rpm regulator On conventional rom regulators this mode is activated by a contact or is set by a trimmer on the rom regulator On GCU it is not necessary to do anything and indeed GCU does not even know that the DROOP mode has been activated For some elec
228. speed e Through a PWM control only GC500 4s and GC500 2 s One of 10 11 or 12 digital outputs can be configured DOF 0049 to supply an output to a PWM control to adjust the rom speed of the engine The frequency of PWM signal is 500Hz suitable for the Caterpillar rom controllers In this case P 0831 P 0856 and P 0857 parameters can be used to convert internal speed reference into an appropriate duty cycle P 0856 and P 0857 determine the minimum and maximum duty cycle 4 2 Voltage regulator management GCU is able to connect to a voltage regulator in two different ways e Through an analogue output See paragraph 4 1 for a description of analogue outputs provided by GCU See GCU technical manuals for the connection to analogue outputs To use an analogue output to control the voltage regulator it is necessary to o Obsolete Use AOF 1002 function to configure the output In this case three parameters can be used to adapt the output value to the internal voltage reference P 0861 parameter allows indicating whether the voltage regulator increases alternator voltage when the input control increases it value O for P 0861 or if the alternator voltage decreases when the input control increases it value 1 for P 0861 P 0862 and P 0863 parameters can be used to set limit values minimum and maximum respectively that the analogue output can take P 0862 value should be lower than P 0863value 72 Parallel functions manual
229. t be closed with synchronization GCU opens MCB if not already open Then only if MCB is open it controls the closing of GCB in case of failure to close it triggers W014 early warning If the opening of GCB is required e Whereas the generator isn t in parallel with mains GCU activates the gradual power discharge when the power of the generator is lower than the power configured with P 0878 parameter or at latest after P 0879 seconds GCU will open GCB switch If the key is held down for more than a second GCU opens GCB switch immediately e Whereas the generator isn t in parallel with mains GCU opens GCB switch immediately In case of failure to open activates W024 early warning If MCB switch is controlled by GCU the operator can require opening or closing by means of MCB key or with the combination of SHIFT GCB keys for GC500 GC500Plus and GC400x If the closing of the MCB is required e f MCB can be closed with synchronization by pressing this key the synchronization function will be activated see 5 4 e lf MCB cannot be closed with synchronization GCU opens GCB switch if not already open Then only if GCB is open it controls the closing of MCB in case of failure to Close it triggers W013 early warning If the opening of MCB is required GCU opens it immediately it is not possible to force a gradual transfer of power to the generator before opening the switch if the generator is in parallel with mains
230. t is always possible to use an external synchronizer to perform synchronization of GCB Only for DST4602x and GC400x if an external synchronizer is used but GCU could manage synchronization internally see above it is possible to configure GCU to use the internal synchro check in any case to allow the closing of GCB P 0846 parameter 1 or 3 values However if the use of internal synchro check is enabled and GCU cannot manage it internally GCU activates W273 early warning inconsistent parameters If the internal synchronizer or even just the internal synchro check is used the control to close the switch is activated only when GCU recognizes the synchronized condition In the other cases 88 Parallel functions manual SICES Empowering your control external synchro check GCU keeps the control to close the switch always active during the whole synchronization it is up to the external synchronizer or to any external synchro check to provide a contact that indicates the status of synchronized which should be used for the actual closing of the switch in series with the control of the GCU for closing the switch lf GCB is controlled externally only possible if DST4602 and GC400x P 0854 gt 2 GCU cannot know when the external logic wants to close the switch and therefore cannot know when to activate the synchronization procedure It is therefore necessary the presence of a digital input configured with DIF 1004 functi
231. t uses Pl regulator for the frequency to bring phase difference to 0 P 0852 and P 0853 parameters determine the maximum duration of synchronization the first is used if synchronization is used to close GCB the second for MCB If the time out expires GCU activates A271 shutdown if synchronization is used for GCB W272 early warning for MCB failure to parallel e MAN P 0848 parameter influence the switch closing mode with synchronization o 1 Yes In this case after a manual closing control GCU activates synchronization exactly as if it were in automatic Pl regulators are working As soon as GCU recognizes the synchronized condition it automatically closes the switch Failure to parallel early warnings are not managed synchronization may last indefinitely Parallel functions manual 91 SICES Empowering your control o Q No In this case after a manual closing control GCU forces the display on the synchronization page and sends frequency and voltage controls to rom and tension regulators PI controllers are not active it is up to the operator to manually adjust from GCU display or via external potentiometers frequency and voltage to cause the synchronism condition see 5 1 and Errore L origine riferimento non e stata trovata When the two voltage three phase systems are synchronous the operator should again send a closing control if GCU sees a synchronism condition it acknowledges the control an
232. tal output see 5 4 1 that activates during synchronization to enable the external synchronizer or to feed it 9 4 4 Synchronization for MCB GCU is able to manage synchronization for MCB for any kinds of systems with the exception of SPM SSB SPtM and MPtM systems It should be expressly enabled with P 0855 value 1 or 3 for DST4602 and GC400x value 1 or 2 for GC500 GC500Plus In order to manage synchronization for the closing of MCB internally GCU should have voltages on both sides of the switch i e mains voltage and users voltage GCU has a single sensor to acquire them both and therefore in principle it would not be able to manage synchronization internally There is only one case in which GCU is able to manage it internally when all the following conditions are met e GCU mains bars sensor acquires mains voltage P 0126 1 e The system is composed of a single generator SSB SSTP or SPtM SSB In this case there may not be other generators that supply voltage to users If the GCB is closed generator voltage is users voltage GCU is then able to internally manage synchronization In any case it is always possible to use an external synchronizer to perform the synchronization of MCB DST4602x and GC400x if an external synchronizer is used but GCU could manage synchronization internally see above it is possible to configure GCU to use the internal synchro check in any case to allow the closing of MCB P 0846 paramet
233. th a delay ranging from 0 to 10 ms compared to the outputs described in 3 2 4 2 It is preferable to use those outputs to control the opening of the switches 3 2 6 2 Description of operations See diagram 3 2 3 1 See the common notes in 3 2 4 The protection is triggered when at least one mains voltage is below the triggering threshold consecutively for the triggering delay The protection is restored when all mains voltages are above reset threshold consecutively for the reset delay 3 2 7 Protection T 27 time dependent low voltage This protection is available for DST4602x and GC400x 3 2 7 1 Overview The latest European directives on the theme of production of power in parallel with mains require production systems connected to medium voltage mains to participate to sustaining of mains voltages in the event of failure of the mains itself In particular the Directive establishes that these systems should not be disconnected from the mains in case of failure on the mains itself according to the following diagram taken from the German standard 56 Parallel functions manual SICES Empowering your control Grenzkurve Spannungsverlauf unterer Wert des WU Spannungsbandes 100 gt 0150 700 1 500 3 000 Zeit in ms Zeitpunkt eines St rungseintnitts The system should never be disconnected from the power mains if all mains voltages are above the red line in the image above Actually e The prote
234. th mains to allow or not the parallel Refer to GCU technical manual regarding the management of the mains for the emergency service configuration and management logics This chapter instead describes the configuration and logics applicable to the power mains for the parallel with mains Basically GCU should acquire two pieces of information e f mains voltage and frequency have values that allow the generator to start the parallel e Once in parallel with the mains special techniques are needed to recognize fast any anomalies present on the mains in order to disconnect the generator from the mains The main problem is that if the mains is not present while the generator is in parallel with it the generator will no longer be synchronized with the mains when it is present again it is therefore necessary to disconnect the generator from the mains before this happens The combination of these techniques is identified as Protection for Parallel with Mains PPR in ltalian For these controls GCU can use its mains bars sensor or an external sensor In some countries the device which should manage the protections for the parallel with mains needs to be homologated then it is often necessary to use an external device 3 1 Use of the external sensor The sensor should be connected to a digital input of GCU function DIF 3103 for DST4602x and GC400x DIF 0039 for GC500x Warning do not use DIF 3101 for DST4602x and GC400x or DI
235. than P 0893 a reverse scaling will be achieved when the value acquired by the analogue input increases the power factor setpoint decreases o Suggested Configure the desired analogue input with AIF 2401 function In this way the conversion of the value acquired by the analogue input in the power factor setpoint is performed by a conversion curve see technical manual See the note above regarding the power factor setting format e GC400x o Configure the desired analogue input with AIF 2401 function In this way the conversion of the value acquired by the analogue input in the power factor setpoint is performed by a conversion curve see technical manual See the note above regarding the power factor setting format e GC500x o Obsolete It is necessary to select an analogue input through P 0891 parameter any value other than 0 and 7 In this case there is no need to configure anything in the parameters related to the selected analogue input and P 0892 and P 0893 parameters are used for scaling the analogue input See description above for DST4602x o Suggested Setting the value 7 in P 0891 parameter In this case it is necessary to configure the analogue input with the desired AIF 2401 function see description above for DST4602x GCU does not support the management of power factor external regulators If it is required to use some connect them directly to the voltage regulator and do not use GCU control for the voltag
236. the closing of the GCB is required e f GCB can be closed with synchronization by pressing this key the synchronization function will be activated see 5 4 e lf GCB cannot be closed with synchronization GCU opens MCB if not already open Then only if MCB is open it controls the closing of GCB in case of failure to close it triggers W014 early warning If the closing of GCB is required e Whereas the generator isn t in parallel with mains GCU activates the gradual power discharge when the power of the set is lower than the power configured with P 0878 parameter or at latest after P 0879 seconds GCU will open GCB switch If the key is held down for more than a second GCU opens GCB switch immediately e Whereas the generator isn t in parallel with mains GCU opens GCB switch immediately If MCB switch is controlled by GCU the operator can require opening or closing by means of MCB key or with the combination of SHIFT GCB keys for some version of GC500 and GC500Plus andGC400x If the closing of the MCB is required e f MCB can be closed with synchronization by pressing this key the synchronization function will be activated see 5 4 e If MCB cannot be closed with synchronization GCU opens GCB if not already open Then only if GCB is open it controls the closing of MCB in case of failure to close it triggers W013 early warning If the opening of MCB switch is required by an operator GCU opens it immediately
237. the inhibition to power load is active e By configuring a digital input with DIF 2502 DST4602x and GC400x or DIF 0030 functions only for GC500x When this input is active the inhibition to power load is active e Through the controls of serial ports see Modbus registers o Holding register 20 By writing the value 20 into the register the inhibition to power load is activated by writing the value 21 it is disabled This control remains active for 30 seconds from the time it is received by GCU it is therefore necessary to repeat it about every 25 seconds until the inhibition to power load should be kept active o DST4602x and GC400x Holding register 101 e 102 It is first of all necessary to write the value configured with P 0004 parameter in register 101 password within 5 seconds by writing the value 31 or 32 into the register 102 the inhibition to power load will be activated by writing the value 33 it will be deactivated The control remains active for 30 seconds from the time it is received by GCU it is therefore necessary to repeat it about every 25 seconds until the inhibition to power load should be kept active 6 Parallel functions manual Empowering your control Note the command can be disabled by configuring a digital input with the function DIF 2706 if that input is not enabled 2 2 Inhibition to starting of the generator In automatic mode GCU determines based on the type of system and the
238. to e Correctly display the status of the switch e Recognize the status of parallel with mains and activate the appropriate adjusting methods of the active and reactive power e Since the system allows parallel with mains the anomalies of failure to open and to close MCB are always managed Sets a delay different from zero for the digital input that acquires the feedback this delay is used as the opening closing time limit of the switch otherwise a time limit of 2 seconds is used Parallel functions manual SICES Empowering your control DST4602x and GC400x it is possible to use the P 0847 parameter to indicate to GCU that in the event of a mains failure MCB switch will open automatically In this way GCU avoids activating failure to close MCB early warnings of in the event of mains failure GCB command P 0854 parameter allows configuring the way GCU manages the switch e P 0854 0 Incorrect value for this type of system e P 0854 1 GCB controlled by GCU synchronization available e DST4602x and GC400x P 0854 2 Incorrect value for this tyoe of system e DST4602x and GC400x P 0854 3 GCB controlled externally synchronization available If GCB is controlled externally DST4602x and GC400x a digital input to request the activation of the synchronization DIF 1004 function should exist The GCB key of the panel can be used in MAN mode to open and close the switch if controlled by GCU Feedback GCB
239. to AUTO GCU keeps this control even if serial communication is stopped DST4602x and GC400x Holding register 101 e 102 First of all it is necessary to write the value configured the P 0004 parameter in the register 101 password within 5 seconds by writing the value 13 in the register 102 GCU switches to REMOTE START By writing the value 21 with the same procedure GCU comes back to AUTO GCU keeps this control even if serial communication is stopped Note the command can be disabled by configuring a digital input with the function DIF 2706 if that input is not enabled e Through a SMS message see 9 e Using P 0426 P 0427 and P 0428 parameters it is possible to select the days of the week and a time frame within which GCU goes into REMOTE START mode For DST4602x these parameters are available from the review 00 40 For GC500x these parameters are available from the review 1 28 2 4 Systems consisting of a single generator For this category of systems the parallel with other generators is never allowed their functions distribution of active and reactive power load management etc are not available As a rule for these types of systems it is necessary to measure the voltage present at the user It is instead important with the exception of SPM system to measure mains voltage and frequency in order to determine its status to e Activate the generator for emergency service if mains is out of tolerance e Determi
240. to an analogue signal to be managed as indicated above DST4602x use Digital Potentiometer function provided by the internal PLC to convert the UP DOWN controls into an analogue value This value should be stored in a virtual analogue input to be managed as indicated above MCB key or the combination SHIFT GCB for GC500 GC500 4s and GC400x is not used Feedback MCB For systems that require the parallel with mains GCU has to acquire the status of mains switch For MSB system it is optional The acquisition of this status can be performed e Through a MCU in this case nothing else is required e Through a digital input of GCU DIF 3002 for DST4602x and GC400x DIF 0006 for GC500x If acquired GCU uses it to e Correctly display the status of the switch e For MSB system GCU prevents GCB switch from closing if mains is connected to the parallel bars and forces its opening if it is closed e For MSB MSTP MPtM and MPtM MSB systems GCU recognizes the status of in parallel with mains and activates all active and reactive power management functions Moreover it manages the status of the protections for the parallel with mains in order to open GCB if they have been activated as interface device or in case as backup device 32 Parallel functions manual Empowering your control e Since MCB is controlled externally GCU cannot manage faults regarding failure to open and close Feedback MGCB If MGCB s
241. triggering W201early warning address duplicated on PMCB Since BTBCU has two PMCB channels can alternatively trigger W203 early warning GCU provides P 0452 parameter for selecting the address it is the same parameter that defines the Modbus address for the mains serial port of GCU On MCU P 3701 parameter is used On BTBCU P 0801 parameter is used It is also possible but not mandatory to indicate how many GCUs are connected to PMCB network In this way GCU can show an inconsistency by triggering W202 early warning incorrect number of GCU the presence of this early warning can be used in the system protection logics see below GCU provides P 0803 parameter to indicate how many generators are connected to PMCB network By setting P 0803 to zero GCUs will not perform any control about the real number of connected GCUs If there are some BTBCU devices connectors connected to the network it is mandatory to set P 0803 to 0 on all GCUs because the real number of GCUs connected to PMCB network depends on the status of BTB switch The latest GCU versions acknowledge the presence of BTBCU with BTB switch open and they automatically disable the W202 early warning Here below all logics managed by devices through PMCB network are described Logics relevant to distribution of active and reactive power aren t described since they are already set out in other paragraphs 8 1 ESU Among all devices connected to PMCB network ther
242. tronic engines with Can Bus communication it is possible enable the DROOP directly on the rom regulator by setting the P 0708 parameter to 1 see 10 11 DROOP managed by GCU If the DROOP should be managed by GCU it should be specifically requested with a digital input configured with DIF 2094 function for DST4602x and GC400x or DIF 0061 for GC500x When the input is activated the DROOP mode is active if GCB is closed GCU defines the curve for the frequency DROOP with two values the working frequency when the generator is without load load frequency and the slope of the curve These two values can be set with GCU parameters P 0974 parameter allows defining the load frequency Hz i e the working frequency that should be guaranteed when the generator is without load This parameter can be modified on GCU even when the engine is running All GCUs allow the modification of this parameter when the DROOP mode is active directly from the display page that shows the single line system diagram As an alternative to this parameter it is possible to use an analogue input to acquire the value of no load frequency In this case the no load frequency will no longer be adjustable from the GCU panel P 0974 is ignored but it will be anyway displayed e DST4602x o Obsolete Configure the desired analogue input with AlF 2304 function In this way the conversion of the value acquired by the analogue input in no load frequenc
243. ual 25 SICES Empowering your control Moreover it has to decide whether MCB switch has to be closed or not MCB is always closed except in case it is configured as interface device P 0900 2 and GCB switch is closed and the protections for the parallel with mains have been triggered The normal automatic operation logic if GCU controls both switches will be therefore 1 MCB closed GCB open engine stopped If the automatic intervention of the generator is required the procedure goes on from step 2 Starting of the engine lt attests that tension and frequency are within tolerance Then the procedure goes on from step 3 MCB closed GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 11 If there are requests for inhibition to power loaa the procedure waits at this point Otherwise it goes on from step 4 Closing with synchronization of GCB This phase lasts maximum P 0852 seconds If the switch is closed the procedure goes on from step 5 If GCB isn t closed within the time limit GCU will activate A271 shutdown failed parallel on GCB and the procedure goes on from step 11 MCB closed GCB closed Here the generator is in parallel with mains GCU should calculate the power setpoint for the generator e P 0881 1 BASE LOAD The power setpoint is P 0884 parameter or a value acquired by the
244. ul one If no generator is able to support the load then the function evaluate all combinations of two generators always by trying to privilege of all less powerful generators first If no couple can support the load then it tries with three generators and so on As to the example of the previous paragraph a 100kW a 300kW and a 700 kW generator if the load were 300 kW the 700kW generator would be started because is the only one able to support the load by itself with a bit of margin P 0826 and P 0828 thresholds are anyway used to select the best combination of generators P 0827 and P 0829 delays are anyway used before changing the combination of generators needed to supply the load P 0816 parameter DST4602x or P 0820 parameter GC400x allows deciding whether it is possible or not to turn off all generators with the load function enabled if all generators with the load function disabled are able to supply the load e P 0816 0 all generators with the load function enabled can be turned off Parallel functions manual 121 SICES Empowering your control 8 6 2 P 0816 gt 0 at least one generator with the load function enabled should stay in action Power reserve This function is available only on DST4602x and GC400x The function power reserve is a function that works in addition to not alternatively the load function it can be used only if P 0822 parameter is set on 0 1 or 2 lts aim is
245. uld be stopped because not needed to support the load e In TEST and in REMOTE START always ignoring inhibitions to starting DST4602x and GC400x by setting P 0243 parameter to 1 GCU is configured to keep the generator supplying in the event of failure to open GCB switch if there are no shutdowns deactivations and discharges In this case the presence W024 early warning is equivalent to a request for automatic intervention of the generator which will be cancelled only when the operator acknowledges the early warning With the engine in action GCU has to decide whether closing or not GCB switch Switch should always be closed save for the following cases e Shutdowns disconnection or discharges have been activated e The shutdown of the generator is required e An inhibition to power load has been activated e In TEST P 0222 parameter is set on 0 The normal AUTOMATIC operation logic if GCU controls GCB switches will be therefore 1 Engine stopped and GCB open If the automatic intervention of the generator is required the procedure goes on from step 2 2 Engine starting wait status before voltage and frequency are within tolerance Then the procedure goes on from step 3 3 GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 10 If there are requests for inhibition to power load the procedu
246. ure goes on from step 2 Starting of the engine It attests that tension and frequency are within tolerance Then the procedure goes on from step 3 MCB closed GCB open If the generator should be stopped shutdowns deactivations discharges or if automatic intervention is no longer required the procedure goes on from step 17 If there are requests for inhibition to power load the procedure waits at this point Otherwise it goes on from e From step 4 if the synchronization for GCB is allowed P 0854 and possible mains status authorizes parallel e From step 10 if GCB cannot be closed with synchronization Closing with synchronization of GCB This phase lasts maximum P 0852 seconds If the switch is closed the procedure goes on from step 5 If GCB isn t closed within the time limit GCU will activate A271 shutdown failed parallel on GCB and the procedure goes on from step 17 MCB closed GCB closed Here the generator is in parallel with mains GCU should calculate the power setpoint for the generator e P 0880 0 Continuative parallel with mains is not allowed Power setpoint is 0 kW e P 0881 1 BASE LOAD The power setpoint is P 0884 parameter or a value acquired by the analogue inputs e P 0881 2 IMPORT EXPORT GCU calculates a power setpoint for the generator so that power exchanged with the mains reaches the required value P 0888 GCU controls the output of the generator to bring it to calculated v
247. ure goes on from step 7 7 MCB open GCB closed In case of shutdowns discharges or deactivations the procedure goes on from step 8 If there are requests for inhibition to power load or if the automatic intervention of the generator is no more required the procedure will go on from step 8 8 Opening of GCB three attempts If the switch opens the procedure goes on from step 5 If case of failed opening e Only for GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 10 e Only for DTS4602x GCU triggers W024 early warning GCB not open If P 0243 parameter is set to 1 this early warning becomes a request for automatic intervention until the operator recognizes the early warning If there are shutdowns discharges and deactivations the procedure goes on from step 10 otherwise it goes on from step 7 9 Closing of MCB three attempts if the switch closes the procedure goes on from step 3 In case of failure to closing GCU activates W013 early warning MCB not closed if P 0221 parameter is set on a value different from zero this early warning becomes a request for automatic intervention until the operator recognizes the early warning If there are shutdowns deactivation or discharges the procedure goes on from step 10 otherwise it will come back to step 5 10 Engine stop 2 4 3 SSB SSTP Single Stand By Single Short Time Parallel Single emergency syst
248. ut_only if this generator has NECB remote control switch closed In all other cases GCU controls to close the remote control switch In particular talking about parallel among generators not about parallel with mains a single GCU at a time among those with GCB closed has to close its own NECB Usually is GCU that controls the largest generator among those with GCB closed in case there are two or more generators with the same nominal power the one with the lower address should be considered P 0452 If the feedback of NECB remote control switch is connected heartily advised in case of parallel among generators GCU will always manage early warnings for failed opening closing of the remote control switch In the logic for selecting the GCU that has to close NECB remote control switch these early warning should be taken into account In detail e ifa GCU indicates on the PMCB Can Bus the failure to close its own remote control switch or the impossibility to close it for example in case of an active shutdown it should be excluded from the list of candidates for the control of closing e lfaGCU with GCB closed indicates on the PMCB Can Bus the failure to close its own remote control switch it will be automatically selected to be the only one intended to close of its own remote control switch When the operator recognizes and stops the early warning then the most suitable GCU for the closing of the remote control sw
249. utomatic intervention until it is recognized by the operator The procedure goes on to e Step 13 if the request for automatic intervention of the generator is still present and there aren t shutdowns deactivations and discharges e Step 15 in other cases 15 Opening of GCB with MCB open three attempts If the switch opens the procedure goes on from step 11 If case of failed opening e DST4602x and GC400x GCU triggers W024 early warning GCB not open If P 0243 parameter is set to 1 this early warning becomes a request for automatic intervention until the operator recognizes the early warning The procedure goes on from step 13 if the request for the automatic intervention of the generator still exists and no shutdowns deactivations and discharges are present otherwise it goes on from step 17 e GC500x GCU activates A024 shutdown GCB not open and the procedure goes on from step 17 16 Closing of MCB without synchronization three attempts when MCB closes the procedure goes on from step 3 If MCB doesn t close W013 early warning is activated MCB not closed If P 0221 parameter is set to a value different from zero this early warning becomes a request for automatic intervention until it is recognized by the operator The procedure goes on from step 11 if the request for the automatic intervention of the generator still exists and no shutdowns deactivations and discharges are present otherwise it goes on from
250. vates to indicate to the operator that generators can support the presently selected power reserve The output is turned off during the phases of starting connection in parallel and of power load of needed generators it only activates when generators are in parallel out of loading phases and can support the needed power reserve For DST4602x starting from version 00 48 and GC400x it is possible to know if the gensets are able to support the power reserve currently selected also by reading the Modbus register INPUT REGISTER 95 Therefore if needed it is possible to install the panel keys that allow to select or disable the power reserve Keys can be also luminous by utilizing outputs configured with DOF 3180 DOF 3183 Parallel functions manual 123 SICES Empowering your control functions Furthermore it is possible to install on the panel a light that indicates when it is possible to connect the required load to generators by utilizing the configured output with DOF 31 84 function By installing keys and not one selector there is the advantage to have identical panels and therefore to select the power reserve on any of them Moreover since they are keys usually they are not active and therefore the operator has also the possibility to select a different reserve level from the serial port or from parameters of one of the GCUs Alternatively a selector can be installed but it should be installed on a si
251. when n hours are elapsed from the previous change With P 0825 parameter it is possible to select every how many hours the master generator has to be changed Warning they are watch hours and not working hours of engines The new master generator will be the one immediately subsequent to the previous one among generators included within the list of priorities In the example at the paragraph 8 6 1 1 after generator 4 generator 6 will be selected as the master one It is still possible to change manually P 0823 parameter but you should bear in mind that the counting of hours restarts every time that the master generator is changed 8 6 1 2 Optimization of generators minimum nominal power This mode is available only on DST4602x and GC400x This mode is selected with the value 7 in P 0822 parameter This mode assures that the sum of nominal powers of started generators is the lowest possible that can supply the load This independently from the master generator P 0823 not used and from the addresses of GCUs This function works with a maximum of five generators included in the load function Let s suppose to have a 100kW a 300 kW and a 700 kW generator if the load were 300kW 100kW and 300kW generators would be started in fact the sum of nominal powers is 400kW that is higher with a bit of margin than the load power In case there were two or more combinations of generators with the same sum of nominal powers the c
252. witch does not exist no action is required If MGCB exists for the systems that involve a parallel with mains GCU should acquire its status For MSB system it is optional The acquisition of this status can be performed e Through a MCU in this case nothing else is required e Through a digital input of GCU DIF 3003 for DST4602x and GC400x DIF 0036 for GC500x If acquired GCU uses it to e Correctly display the status of the switch e To enable the load management if mains is not connected to parallel bars the functions automatically start stop the generators according to the size of the load to be supplied e For MSB system GCU prevents GCB switch from closing if mains is connected to the parallel bars and forces its opening if it is closed e For MSB MSTP MPtM and MPtM MSB systems GCU recognizes the status of in parallel with mains and activates all active and reactive power management functions Moreover it manages the status of the protections for the parallel with mains in order to open GCB if they have been activated as interface device or in case as backup device GCB command P 0854 parameter allows configuring the way GCU manages the switch e P 0854 0 Incorrect value for this type of system e P 0854 1 GCB controlled by GCU synchronization available e DST4602x and GC400x P 0854 2 Incorrect value for this type of system e DST4602x and GC400x P 0854 3 GCB controlled externally synchr
253. xternally synchronization not available e DST4602x and GC400x P 0854 3 GCB controlled externally synchronization available If synchronization is required and GCB is controlled externally DST4602x and GC400x a digital input to request the activation of the synchronization DIF 1004 function should exist The GCB key of the panel can be used in MAN mode to open and close the switch if controlled by GCU Feedback GCB Use DIF 3001 DST4602x and GC400x or DIF 0007 functions for GC500x to configure the input that acquires the feedback Since the system allows the parallel with mains it is to connect the feedback of GCB switch GCU uses it to e Correctly display the status of the switch 28 Parallel functions manual Empowering your control e Determine the presence of voltage on the parallel bars to decide whether the closing of switches can be done via synchronization e Recognize the status of parallel with mains and activate the appropriate adjusting methods of the active and reactive power e Since the system allows parallel with mains the anomalies of failure to open and to close GCB are always managed Sets a delay different from zero for the digital input that acquires the feedback this delay is used as the opening closing time limit of the switch otherwise a time limit of 2 seconds is used Synchronization for GCB Available Synchronization for MCB Available PMCB communication bus Not requ
254. y is performed with P 0972 and P 0973 parameters The no load frequency for the DROOP will be set up in P 0972 when the analogue input is at its minimum value 0 it will be the one configured with P 0973 when the analogue input is at its maximum value 100 By setting P 0972 to a value higher than P 0973 a reverse scaling will be achieved when the measure acquired by the analogue input increases the no load frequency decreases o Suggested Configure the desired analogue input with AIF 2305 function In this way the conversion of the value acquired by the analogue input in no load frequency is performed via a conversion curve see technical manual 82 Parallel functions manual SICES Empowering your control Note starting from DST4602x version 00 48 it is possible to use another digital input to decide if using the analogue input or the parameter P 0974 to set the no load frequency That input will be configured with the DIF 2714 function The possibilities are o If no analogue input is configured with the AIF 2304 or AIF 2305 function the set point is established by the parameter P 0974 o If there is an analogue input configured with the AlF 2304 or AIF 2305 function The set point is established by the analogue input if there are no digital input configured with the function DIF 2714 The set point is established by the analogue input if there is at least one digital input configured with the functi
255. y for the automatic operation of the generator From this point of view three types of systems can be identified e Generator for stand alone production only The term stand alone indicates the situation in which one or more generators supply a load without being in parallel with mains The automatic intervention of the generator is always required regardless of the status of mains Parallel with mains is not allowed e Emergency generator The automatic intervention of the generator is required in case of failure of power mains The parallel with mains is allowed even if it is not the normal operation for this type of system e Generator for the production in parallel with mains only The automatic intervention of the generator is required only if the power mains is present and within tolerance Stand alone supply is not allowed The following table shows a summary of the types of systems on the basis of what was said before P 0802 Stand Emergency Production Number of Parallel Stand alone alone in parallel generators with mains supply production with mains i SSB SSTP MSB MSTP The acronyms indicated in the first column will be described in detail below It is important to understand the difference between the SSTP SSB and SSB SPtM systems both in fact allow stand alone supply and supply in parallel with mains The difference lies in the way through which the automatic intervention of the
256. your control 9 9 4 Unloading phases Similarly when a generator that is supplying in parallel to other generators should open its GCB if there are no active shutdowns or disconnections GCU will transfer all active and reactive power to the other generators before opening the switch GCB will be opened when active power is close to 0 This phase is called unloading phase and ends with the opening of GCB GCU provides some parameters to configure the unloading phase e P 0874 P 0125 s This parameter is in common with the loading phase It determines the speed at which GCU transfers active and reactive power to the other generators It is used if there are no active shutdowns deactivations and discharges e P 0875 P 0125 s This parameter is equivalent to the previous one but it is used by GCU if the generator should come out from the parallel because there are active discharges but no shutdowns and disconnections e P 0878 P 0125 This parameter allows configuring active power under which the unloading phase is considered as completed and the switch can be opened e P 0879 s This parameter configures the maximum length of the unloading phase After this time the switch is opened irrespectively of the active power of the generator It is possible to configure a digital output of GCU with DOF 0103 function AND OR logics with ST 101 status the output is activated during the unloading phase DST4602x and GC
257. z V curve As it is in parallel with mains this results in a power factor which tends switch to capacitive GCU compensates this drop by requiring more voltage to voltage regulator At any rate the alternator manufacturers Marelli say that when frequency decreases the current supply capacity of the alternator is reduced by about 5 due to thermal issues To handle this situation DST4602x provides for the following parameters e P 0956 mains low frequency threshold for active power setpoint limitation e P 0957 delay for active power setpoint limitation for mains low frequency s The limitation is applied if frequency is below P 0956 threshold for P 0957 time Power limitation is immediately removed if frequency rises above P 0956 threshold e P 0958 active power setpoint limitation ratio for mains low frequency Hz 108 Parallel functions manual SICES Empowering your control DST4602x records EVT 1127 and EVT 1128 events when it enables disables this limitation By assuming to set P 0956 99 0 49 5Hz if P 0957 3 0 s and P 0958 2 5 Hz the following power reduction curve for low frequency is achieved Potenza 101 00 100 00 99 00 98 00 97 00 96 00 95 00 94 00 50 5 50 0 49 5 49 0 48 5 48 0 47 9 47 0 Frequenza Hz 9 6 3 3 Reduction of supplied power due to mains low voltage Under the new standards the generator should stay in parallel to mains with voltages up to 85 of rated voltage

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