Instructions Manual
Contents
1. gj CIRCUTOR Power factor regulators computer MAX 6 computer MAX 12 CIRCUTOR Instructions Manual M98228201 03 14A CE M98228201 03 14A computer MAX 6 computer MAX 12 M98228201 03 14A computer MAX 6 computer MAX 12 Index 1 INTRODUCTION AND SAFETY RECOMMENDA TIONS 2 cccccccccsccccccccccccccccccccccccccccccccccccccsccees 4 LV DELIVERY SPOT CHEC avem a A A A E 4 AAR TIN GS RIDIN nd acai 5 Ee A E ONS eased ceca A E IA dint mci uae A CA 5 Fod For guad rant TE WUL OV S AAA A AAA A RS 5 132 ECPprogramiPAST Computerized Program ib ei a EOR E 5 TDD ALE II SUC S iste sealer ak ec eal Uso ns at esse te ra ec a cia ean Sessa Ga ade Taonga nit ane tnes 5 EA DALS TOTO PIO CEMSA AAA AAA cel Se heed os ae AS 5 YAS se aN A Croce og Vee Ne reer Ore eet TE A ee Pe eer OUEST eer On Te ATE eee a eM MRT Pret ee T 6 GENE RAT CHARACTERISTICS onu ana ar cis 6 FRONT PANEL SCREEN AND KEY BOARD 1 cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccscccceess 7 OM A PUA SORE Nearer tsetse esa A eta tee ns ee A tase e as ta ee 8 A SVM NVI TER aires can ta dl o a dl e tata lalo dl rela bata latte deren cad 8 32 BRRORS AND ERROR MESSAGE S wii o dd dol cs 1 o bl eee oli o dl o e ee ted 8 o A A O UA 8 3 5 REGULATOR STATUS AND KEY FUNCTIONS cia 9 3 5 1 KEY FUNCHIONS in norma RENTES ASA A ROA 9 Dez KEY TURCOS TIE TT TOUS LS do 9 4 INSTALLATION AND S FAR PF UP pannut ieoten a a ictiada 10 At TECHN2. Computer MAX behaviour under ALARM conditions Description Measured current below threshold 0 05A measured at the secondary side of CT Over compensation The controller demands for stages disconnection and they are all disconnected Sub compensation The controller demands for stages connection and they are all connected Overcurent The measured current is 20 above the rated current primary of CT Overvoltage The measured voltage is 15 above rated voltage Possible cause and Computer MAX behaviour Posible causes Baja carga o TC no conectado El aparato muestra el LED de RUN y la pantalla con todo ceros parpadeando y no conecta ning n rel Possible causes C K not properly adjusted None of the realys will connect Possible causes C K not properly adjusted All the relays will remain connected except the alarm relay if exists see paragraph 3 3 Possible causes C K not properly adjusted Alarm relay if exists disconnects see paragraph 3 3 Although the regulation may be wrong the device tries to regulate the PF normally Possible causes Connection to a wrong supply voltage Alarm relay if exists disconnects see paragraph 3 3 Although the regulation may be wrong the device tries to regulate the PF normally 8 MAINTENANCE The Computer MAX 6 and MAX 12 do not require a special maintenance program In case that some adjustments or maintenance might be necessary it must be performed by dully quali
3. The Computer MAX devices are used together with capacitor banks which can remain charged after supply disconnection In order to avoid shock hazard wait during 5 minutes after supply disconnection before any manipulation inside the equipment cabinet Computer MAX devices require current sensing of the installation A current transformer CT must be installed externally to perform this function Usually the current ratio of the CT is h 5 A where In must be at least 1 5 times the MAXimum expected load current The CT must be installed at the incoming supply line point of coupling of the user so that it measures the total current of all the loads including also the compensation capacitor bank see fig 4 1 The CT should be installed preferably in phase L1 while the voltage measuring terminals of Computer MAX should be connected to phases L2 and L3 see schematics in figs 4 2 and 4 3 It s important to respect the connection senses of P1 P2 and S1 S2 shown in the above mentioned figs otherwise the phase difference will have to be corrected by adjusting the device according to set up procedure indicated in paragraph 5 17 RIGHT CONNECTION WRONG CONNECTIONS PA a T A P1 TC O CAPACITORS LOAD CAPACITORS CAPACITORS The CT measures the whole If CT is placed in this position CT is placed in this position current of loads capacitor bank NONE of the CAPACITOR ALL THE CAPACITOR STAGES In case of malfunction ch
4. 0 30 0 36 0 48 0 60 0 72 090 096 4005 0 05 0 09 0 14 0 18 0 23 0 27 0 36 0 45 0 54 0 68 0 72 090 5005 007 0 11 0 14 0 18 0 22 0 29 0 36 0 43 0 54 0 58 0 72 087 6005 006 0 09 0 12 0 15 0 18 0 24 0 30 0 36 0 45 0 48 0 60 0 72 0 90 0 96 8005 0 07 0 09 011 0 14 0 18 0 23 0 27 0 34 0 36 0 45 0 54 0 68 0 72 10005 0 007 0 09 0 11 0 14 0 18 0 22 0 27 0 29 0 36 0 43 0 54 0 58 15005 005 oo 0 07 0 10 0 12 0 14 0 18 0 19 0 24 0 29 0 36 0 38 _ 20005 o 0 07 0 09 0 11 0 14 0 14 0 18 0 22 0 27 0 29 O 0 06 0 07 0 09 0 11 0 12 0 14 0 17 0 22 0 23 30005 TT f oo 0 06 0 07 0 09 0 10 0 12 0 14 0 18 0 19 400088 pp 0 07 NOTE For supply voltages other than 400 V the C K factor obtained from the table must be multiplied by the ratio 400 Vsuppy IMPORTANT If C K is adjusted too low the system will connect and disconnect steps with a lower threshold and therefore the number of operations to control the average PF will be higher If C K is adjusted slightly above the required value 10 the system will react with higher threshold values and therefore the number of operations to control the average PF will be lower Wear of PF compensation is also lower 5 4 C K par
5. Rear face label 1 2 Starting screen When the Computer MAX is started just after supply connection the screen shows a code indicating the device version It s important to indicate this code in case of reporting any device fault or error 1 3 Definitions In this section we shall give several definitions which will be useful to understand several sections of this manual 1 3 1 Four quadrant regulators This term is used to describe the regulators which are able to perform measure and control either if the active power flows from the utility to the customer network the common case of a consuming facility or if it flows in the reverse sense The later is the case of facilities containing power generation equipment which export some amount of generated power to the utility 1 3 2 FCP program FAST Computerized Program The units having FCP program control the switching of capacitor stages in order to minimize the number of switching operations to reach the required PF compensation Moreover the program assigns the capacitor stages to be connected or disconnected using a FIFO criterion FIFO First IN first OUT that way the times of use of all stages are equalized 1 3 3 Stages and steps We must distinguish between these two terms In this manual we call STAGE to each of the capacitor groups that constitute the PF correction unit The capacitor stages in PF correction equipment may have all the same power or not as explained in th
6. to the parameter being The x10 Ob LED shows configured Right column list that the reading of current or Symbols indicating the stages MAX current has to be which are connected only in RUN multiplied by 10 mode 3 2 Measured parameters When the instrument is in normal RUN mode the following parameters can be displayed cos mains current THD of both mains current and mains voltage The instrument can also display the MAXimum values of mains current and voltage since the last parameters clear The parameter being displayed can be selected with the navigation keys and is indicated by the gt cursor 3 3 Errors and ERROR messages In case that the regulator detects a possible error the front screen shows an error code The possible error codes are listed and explained in table 3 1 Table 3 1 Possible errors and messages displayed on the screen ERROR Description message cI nim Load current below the threshold current or current transformer CT not LiL connected The threshold is 0 1 A at the secondary side of CT Overcompensation The regulator detects that some stages should be disconnected but all the stages are already disconnected Under compensation The regulator detects that some stages should be connected and all the stages are already connected Overcurrent The measured current exceeds the rated current by a 20 Rated current is considered to be the CT primary rated current Overvoltage The measured v
7. 0082 1 EN Reference standards 50082 2 EN 61000 4 2 EN 61000 4 4 EN 61000 4 8 EN 61000 4 5 EN 61000 4 11 UL 94 Installation Category III Protection against electrical shock with double insulation class II according to EN 61010 1 IP 40 device mounted in panel front IP 30 device case according to EN 60529 Environment admissible Temperature 20 60 C Relative humidity MAX 95 without conditions condensation MAX altitude 2000 m Control system FCP Program which minimizes the number of operations 10 M98228201 03 14A computer MAX 6 computer MAX 12 4 2 DEVICE INSTALLATION 4 2 1 Mechanical Installation Mechanically the device is intended to be mounted attached to the front door of the cabinet The fitting hole must be according to DIN 43 700 dimensions 138 x138 mm 4 2 2 Connections Before connecting the supply to the device check the following items The installation and maintenance of the device must be carried out by specialised and dully AN trained staff according to National Electric Codes and Rules and International Standards All the connections must be at the inner part of a protection cabinet Notice that when the device is connected to supply the voltage at certain terminals can be hazardous and cause electric shock in case of contact Opening the electrical cabinet or removing certain covers can compromise the user safety and should only be done by qualified and authorized staff
8. 2 The second stage and successive have a power double than the 1st step 14 M98228201 03 14A computer MAX 6 computer MAX 12 The available programs of Computer MAX regulator are listed in table 5 2 The default factory setting of Computer MAX devices is 1 1 1 1 Table 5 2 Available configuration programs for Computer MAX devices Screen Indication Stage s configuration 1 2 4 4 4 1 2 4 8 8 1 2 4 6 6 5 6 Connection and re connection time settings To set up this parameter use the keys Y Y until the cursor points to the option I Delay then push O This parameter sets up the delay times of the device The setting value Tc is the delay time between the connection or disconnection of successive capacitor stages The parameter also sets up the called re connection delay Tr which is the minimum time that must elapse between the disconnection of a C stage and its following connection The range of Tc settings goes from 4 s to 999 s Tr is automatically set to 5 times Tc Notice that Tr is needed to guarantee the capacitors discharge The default setting of Tc is 10 s 5 7 Selection of the number of stages To set up this parameter use the keys D Y until the cursor points to the option Steps then push O This setting allows the selection of the number of stages of the PF compensation equipment Depending on the device type Computer MAX 6 or MAX 12 we can select up to 6 or 12 stages If the number of stages
9. Current input S2 lt vale RELAYS C1 C6 RELAYS C7 C12 FA a DIDIVDSD COM 7 8 9 10 11 12 Fig 4 3 Connection schematic for Computer MAX 12 Rated voltage depending on type See device label OMONOnOKRWNHY AOD YD Relays common Relay Output 1 Relay Output 2 Relay Output 3 Relay Output 4 Relay Output 5 Relay Output 6 Relay Output 7 Relay Output 8 Relay Output 9 Relay Output 10 Relay Output 11 Relay Output 12 Supply Measure Input OV Supply Measure Input WARNING For Computer MAX 12 devices 12 relay outputs the connection between COM terminals in the upper and lower terminal strips must be done externally 12 M98228201 03 14A computer MAX 6 computer MAX 12 5 CONFIGURABLE PARAMETERS In order to adapt the regulator to the loads certain parameters of the Computer MAX must be set up The programmable parameters the required settings and the set up procedure are explained here below See also paragraph 3 5 2 to see how to select the different menu options The configurable parameters are listed and shortly explained below 5 1 Plug amp Play function To access the Plug amp Play screen press the D Y buttons to open the following screen Press to start the process if you want to stop the process long press Y and it will return to its initial state Once started the digits will start flashing and the unit will start a capacitor measurement calculation and connection and disconnec
10. ICALCHARACTERISTICS ncen A e ee ee en 10 Ad EY Os de hae AEEA TION a ee een ee 11 4 2 1 Mechanical A a o e See 1 4 2 2 A ee OS 1 4 2 3 Cabling cross sections and PLOLECTIONS oooccccccccononnnnnonnnnnnnananncnnnnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnrnnnnnnnnnnnnaninnnss 12 4 2 4 ES RN 12 5 CONFIGURABLE PARAMETERS cuniiis coscedeascetedesccctedessddendoeteceasossedesccetedeascasodescdcceecs 13 Dal PLUG AAO O o da Ll dd e o e dio 13 Died A Osram E AE E aad ge ead E A EE elas EAEE AE 13 5S9 SMALLER AVAILABLE CAPA COR O E e ie ee i 13 SA CC PARAMBETER CALCULATION ts xc ce LIE lo Ia 14 5 5 STAGE S CONFIGURATION OF PF CORRECTION EQUIPMENT CONFIGURATION PROGRAM cccceeeeeeeeeeeeeees 14 5 6 CONNECTION AND RE CONNECTION TIME SETTINGS cccsccecceccececceccscecccceccscesceccestecescesceseectssscescesescascscesees 15 5 7 SELECTION OF THE NUMBER OF STAGEG cccssceccscescescesceccecescescescecescescescecesceecescessecescescestsctssescescesescuscescesees 15 IS VOIP EASE ANGLE SN e e dd O 15 5 9 PROGRAMMING THE CT RATED CURRENT PRIMARY ssssseseeseeeeseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees 16 6 SET UP MENU AND PROCEDURE oocccccccccccccccccccoccnccnccnoconcnoconccnnonocononocooccoccnccnocnocnocnoccoccnccnocnoccocnoccnccnnos 16 6 1 HOWTOACCESS THE SET UP MENU adas 16 02 NAVIGATION SCHEMA ads e Md lo a ad e 17 7 RUN SA UN dd o S 18 7 1 FUNCTIONS OF THE DEVICE IN NORMAL RUN MODE cccsceccsceccecccsce
11. W KVAr KVAr Cosp Cosp Leading Capacitive 90 Leading Capacitive Exported Power Imported Power Fig 2 1 Power signs in four quadrants measurements 3 FRONT PANEL SCREEN AND KEYBOARD The PF regulator s front panel shows the following items Front Screen Configurable Parameters Measured Parameters Cos A NOTE The set up procedure the description of different THD parameters and the different control modes are described in detail in V the SET UP section section 6 Max Fig 3 1 Front cover and screen Navigation keys M98228201 03 14A computer MAX 6 computer MAX 12 3 1 Display screen Computer MAX devices are equipped with a 3 digits x 7 segments LCD screen The screen has also a set of icons which provide information about the regulator status The main indications are cos value reactive power sign Y for lagging or inductive PF and AF for leading or capacitive PF connected stages and measurement of different parameters see section 3 2 Screen and LED Icons Indications Y Lagging or inductive P die In normal working conditions RUN power AGAUR o V me m m LED red is ON and P cursor AH Leading or capacitive THD Po points to the parameter being power indication 4 WA displayed Left column list The WOON LED red is a ane a 7 In SET UP mode the RUN LED is ON in normal working OFF the gt cursor is blinking and conditions pointing
12. ameter calculation For conditions other than those given in table 5 1 the parameter C K can be calculated as follows The necessary data to perform the calculation are The power of the smaller capacitor step O the supply voltage V and the current transformer ratio K K I Mo prim Where J is the CT primary rated current i e in a 250 5 CT the primary rated current is 250 A prim I isthe CT secondary rated current usually 5 A SEC Then the smaller step reactive current Ic can be calculated as Ic E V3 V Ic Q and the C K parameter would be C K K 3 KV Example Assume a PF equipment at 500V where the smaller capacitor is rated to 60kvar and the CT has a ratio 500 5 The calculation would be as follows K ratio K 500 5 100 Smaller capacitor current I ALE 69 28A 3 500 C K parameter CIK Ta n 0 69 K 100 5 5 Stage s Configuration of PF correction equipment Configuration program To set up this parameter use the keys D Y until the cursor points to the option Prog then push PF correction equipment is constituted by several capacitor stages which may have different power ratings Taking as base the power of the smaller capacitor stage the powers of the rest of stages can be given in terms of multiples of the smaller step Then we could state the configuration configuration program of PF equipment as Program 1 1 1 All the stages have the same power in kvar Program 1 2
13. anufacturer may involve serious dangers to the user Before performing any maintenance operation on the Computer and associated PF compensation equipment be sure to disconnect the main switch After disconnecting the switch wait at least 5 minutes to ensure that the capacitors are totally discharged DANGER During the installation maintenance or commissioning of equipment regulated by a Computer MAX unit the following safety precautions must be observed Y Before connecting the equipment make sure that the earth terminals have been properly connected A defective earth connection may cause a wrong operation of equipment and involves a danger of electric shock to the user or system operator v Maintenance must be performed taking the necessary precautions to avoid electrocution and electric shock Ensure that the unit has been disconnected and wait the necessary time to ensure that the capacitors are totally discharged before any maintenance action We recommend the use of safety goggles and gloves when cabinet doors are open and protection covers removed Y Ifa PF compensation unit is connected to mains and capacitors are accidentally connected without load a resonance may occur In such condition voltage harmonics may be amplified cause overvoltage and damage the compensation unit and other equipment connected to the mains v The start up and interruption procedures indicated in the manual must be followed to avoid damaging the PF eq
14. ccececcscecescececcscsescecescecescesescesesencess 18 7 2 COMPUTER MAX BEHAVIOUR IN ALARM MODE cceccscecceccecceccececcecceccscescscectsceecsceccscescesceceecescascescess 19 8 MAINTENANCE diia ir teevacessds sa cerazavosetadeseceiancetuwsndesaGancaceneweade sees 19 9 TECHNICAL SERV E ssw decbedecacesactecccae ccc aeuatosececee ses cue saab uccccecoucsecnanadeneedeewsecestacsuaeaeees 19 M98228201 03 14A computer MAX 6 computer MAX 12 1 INTRODUCTION AND SAFETY RECOMMENDATIONS CIRCUTOR S A would like to thank you for showing your trust by choosing one of our Computer MAX series regulators These units are constructed with the latest state of the art technology including a powerful processor to calculate the optimum algorithms for achieving the best compensation of cose The units comply with the Electrical Safety Standard EN 61010 in accordance with the requirements of the Low Voltage Directive LVD 73 23 EC and EMC Directive 2004 108 EC and therefore they are certified to carry the CE mark This user manual describes the operation of the Computer MAX series regulators and shows the user the procedures required to install commission and operate the units SAFETY The installation and maintenance of the unit must be performed by duly trained and authorised staff and in accordance with the national and international standards Any inappropriate manipulation or use of this equipment out of the conditions specified by the m
15. computer MAX 6 computer MAX 12 6 2 Navigation schematic Tabla 6 1 Menu navigation schematic Parameter Device screen display See selection paragraph Long push to start set up Long Plug amp Play asin rN Push a Mesurement JA rh Plug amp Play 51 D Qo Bo stop Plug amp Play Target cose em Starting screen Increase Run M Next D esurement es a Q digit 52 C K Increase Run md O 10 Mesurement Q so 5 3 r9 T j 5 4 C K Program ae Run Mesurement 5 5 z Q Program setting Delay times Increase Run Mesurement Q Next Le La digit 5 6 Delay setting Nr of stages e Increase Run O 10 Mesurement Q Decrease 9 Nr steps setting CT phase q Q Kii Change Mesurement m Pan L 5 8 O CT phase setting CT primary Run Mesurement yA Next current G cy digit 5 9 Increase CT primary current setting Initial screen IMPORTANT While the device is in set up mode if there isn t any key pushing for more than 3 minutes the device returns automatically to normal RUN mode and none of the previously edited parameters are changed nor saved To exit the set up menu changing the edited parameters push the key O for more than 1s 17 M98228201 03 14A computer MAX 6 computer MAX 12 7 RUN STATUS Once the device has been configured according to installation needs it can be set to RUN mode to regulate the PF of the installation RUN mode is the default mode after
16. e following paragraphs The term STEP is used to describe the minimum fraction of reactive power in which the PF correction equipment is divided Usually this is the power of the lower stage 1 3 4 Stages ratio program Powers of successive capacitor stages in PF correction equipment generally follow certain patterns called stages ratio program or simply Program The stages program indicates the relationship between the different capacitor stage powers Most common stages ratio programs are the as follows M98228201 03 14A computer MAX 6 computer MAX 12 Program 1 1 1 All capacitor stages have the same rated power kvar For instance a 5 stage unit of 100 kvar would be formed by 5 equal stages of 20 kvar and would be described as a unit of 5 x 20 kvar Program 1 2 2 All capacitor stages from the second and up have a rated power kvar which is twice the rated power of first stage For instance a 5 stage unit of 180 kvar would be formed by a first stage of 20 kvar and 4 equal stages of 40 kvar and would be described as a unit of 20 4 x 40 kvar Program 1 2 4 The rated power of the second stage is twice the rated power of the first stage and the rated power of third stage and up is 4 times the power of the first stage For instance a 5 stage unit of 300 kvar would be formed by a first stage of 20 kvar a second stage of 40 kvar and 3 equal stages of 80 kvar and would be described as a unit of 20 40 3 x 80 kvar Other s
17. eck that STAGES WILL CONNECT WILL CONNECT the CT is not shortcircuited The equipment does not regulate WARNING This situation may properly cause overcompensation resonance and overcurrent Fig 4 1 Placement of current transformer CT 11 M98228201 03 14A computer MAX 6 computer MAX 12 4 2 3 Cabling cross sections and protections The supply circuit must be protected by means of fuses or a circuit breaker sized between 0 5 and 2 A Recommended fuses are gl type IEC 269 or M type IEC 127 A main circuit breaker must be provided in order to allow the disconnection of control circuits from supply Computer relays contactor coils etc The main switch must be easily accessible The cabling cross section must be minimum 1 5 mm for the voltage supply and for the relay outputs and 2 5 mm for the cables connecting secondary of CT to Computer MAX For distances between CT and computer higher than 10m the cross section of the last must be increased at a rate of 1 extra mm every 10 m 4 24 Schematics computer MAX 6 SUPPLY AND MEASURE TERMINALS Z Terminals functions Current input S1 Current input S2 Relays common Relay Output 1 Relay Output 2 Relay Output 3 Relay Output 4 Relay Output 5 Relay Output 6 Supply Measure Input OV Supply Measure Input lt OOOKRWNY AO0O0N D gt U SUPPLY AND MEASURE TERMINALS COM 1 2 3 DONSDeON Z o Terminals description Current input S1
18. exiting the set up menu or after the device start Supply connection followed by a short initialisation period When the device is in RUN mode it can reach one of the following status a Normal RUN status Absence of alarm In this status the device performs the automatic PF regulation connecting and disconnecting the capacitor stages according to installation needs In this status the user can access to the measurement of different parameters and can also force the manual connection or disconnection of capacitor stages as described in paragraph 7 1 b Alarm status If any of the anomalous situations described in paragraph 3 2 occur the device jumps to alarm status and displays the error code Depending on the error type the regulator may perform the disconnection of all the stages or continue regulating the PF as in normal RUN 7 1 Functions of the device in normal RUN mode In the normal RUN mode the Computer MAX can perform the following functions Manual connection of capacitor stages Keep the key pushed during more than 1s and the regulator will sequentially connect the different steps following the normal program and respecting the delay time ton set in the set up procedure Manual disconnection of capacitor stages Keep the key pushed during more than 1s and the regulator will sequentially disconnect the different steps following the normal program and respecting the delay time tr set in the set up procedure Displaying the numbe
19. fied staff and respecting the required safety procedures If any malfunction of the PF compensation equipment or associated protections is detected the equipment should be disconnected from mains Before performing any maintenance repair or update operation on the Computer or associated PF compensation equipment be sure to disconnect the main switch and after disconnecting the switch wait at least 5 minutes to ensure that the capacitors are totally discharged 9 TECHNICAL SERVICE In case of any doubt on the behaviour of the device or in case of malfunction which cannot be solved by the maintenance staff contact CIRCUTOR technical service gf CIRCUTOR CIRCUTOR SA Servicio Posventa Vial Sant Jordi s n 08232 Viladecavalls Barcelona Tel 902 449 459 Spain Tel 34 93 745 29 00 Out of Spain Fax 34 93 745 29 14 e mail sat circutor es 19
20. ide the set up sub menus Change the digit to be edited in case of numerical values with more than one digit Alarm Enable Disable keep pushing these keys at the same time for more than 1s RDF ADA Ul or enable LA Measured current below threshold Over compensation and Sub compensation alarms paragraph 3 3 When these alarms were disabled the regulator doesn t show its error messages to disable M98228201 03 14A computer MAX 6 computer MAX 12 4 INSTALLATION AND START UP This section contains information instructions and warnings that the user must follow by its own security and to ensure safe operation of the device WARNING Computer MAX regulators are usually connected to equipment containing capacitors which remain charged after removing supply voltage To avoid risk of electric shock you must wait at least 5 minutes between the disconnection of the equipment and handling of the internal components thereof Any handling or use of equipment in different way or conditions to that specified by the manufacturer may compromise the user safety In case that some damage or deterioration signs are detected in the device or a wrong operation is observed disconnect the supply voltage and contact CIRCUTOR authorized technical service To safely use the Computer MAX 6 and Computer MAX 12 it is important that people installing it or handling it follow the usual safety precautions stated in the LV or MV Electrical Code Rule
21. ion is in a stepwise mode the regulator will add a new step when the demanded power is at least 70 of the lower available step power and will remove a step when the excess is also a 70 of the lower available step power The cos adjustment range is from 0 85 inductive to 0 95 capacitive 5 3 Smaller available capacitor step To set up this parameter use the keys D Y until the cursor points to the option cK then push O This parameter named C K indicates the reactive current supplied by the smaller capacitor step measured at the secondary side of the current transformer CT Therefore the setting value depends on the power of the smaller capacitor step on the CT ratio and on the supply voltage Table 5 1 gives the setting values of C K for a 400 V phase to phase supply for different CT ratios and different values of smaller capacitor step kvar For conditions other than those given in table 5 1 the paragraph 5 13 shows a simple calculation to obtain the C K value See also foot NOTE ice M98228201 03 14A computer MAX 6 computer MAX 12 Table 5 1 C K factor according to smaller capacitor power and CT ratio i ivy Smaller capacitor power in kvar at 400 V pi is 25 500 7 100 12 5 150 20 0 250 30 0 37 5 40 0 50 0 60 0 75 0 80 0 0 24 0 96 2005 0 09 0 18 0 27 0 36 0 45 054 072 0o90 2505 0 07 0 14 0 22 0 29 0 36 043 0 58 072 087 300 5 0 06 0 12 0 18 0 24
22. is less than 6 or 12 respectively in Computer MAX 6 or MAX 12 the relay number 6 or 12 is automatically assigned as alarm relay see paragraph 3 3 5 8 U l phase angle setting To set up this parameter use the keys D Y until the cursor points to the option Phase then push O During the set up of this parameter the screen shows alternatively one of the options T1 to T6 and the COSQ This parameter permits the adaptation of the regulator to different options of connection of voltage and current measurement in the three phase system The default assumed connection is the one shown in figs 4 2 and 4 3 i e the current transformer placed in phase L1 and voltage measurement between phases L2 terminal C and L3 terminal D Sometimes it s difficult to guarantee this connection or even check how it is To adapt to this unknown situations the Computer MAX devices allow the selection of different options T1 to T6 as shown in table 5 3 To select the right option during start up you should verify that there is load and that the loads are mainly inductive with a cos between 0 7 y 1 In this situation try the different options until the cos screen shows a value between 0 7 and 1 Table 5 3 Phase shift options in Computer MAX Screen tr al V measured in phases CT placed in phase L3 P1 P2 or S1 S2 reversed 5 OP op ia2 L1 P1 P2orS1 S2reversed L2 P1 P2 or S1 S2 reversed 15 M98228201 03 14A computer MAX 6 computer MAX 12 5 9 P
23. oltage exceeds the rated voltage by a 15 3 4 Alarm relay In case that the number of stages configured in a Computer MAX 6 or MAX 12 is less than 6 or 12 respectively the relay number 6 or 12 is automatically configured as alarm relay The relay remains connected in absence of alarm positive safety and disconnects in case that one or more of the errors listed in section 3 2 occur Notice that the absence of supply voltage will always be detected as an alarm condition The alarm relay has a delay of 10 s in case of Over compensation and Under compensation but the operation is instantaneous delay lt 1 s in case of Over voltage and Over current 8 M98228201 03 14A computer MAX 6 computer MAX 12 3 5 Regulator status and key functions Computer MAX regulators have two possible status Normal or RUN Status This is the normal working status of the regulator In such status the device measures and displays the cos of the loads and automatically regulates the connection and disconnection of capacitors in order to compensate according to programmed target value The regulation depends on several parameters configured during the starting set up process Set up or adjustment status This status allows the configuration of the device Push the key O for a time gt 1 s to enter the set up status mode This will stop the automatic PF regulation will cause the progressive disconnection of connected stages and once disconnected will allo
24. put relays which determines the number of stages that they can control Type MAXimum Nr of output relays computer MAX 6 6 relay outputs computer MAX 12 12 relay outputs Among the most important features of this PF regulator series we can stand out the following FCP regulation system which minimizes the number of switching operations Wide choice of switching programs 1 1 1 1 2 2 1 2 4 1 1 2 2 etc which allows the split up of the total power into up to 31 steps in MAX 6 or up to 79 steps in MAX 12 Four quadrants control see fig 2 1 display of the connected stages of cos and active and reactive power signs inductive or capacitive 1H LCD display screen with three seven segments characters plus 20 icons to sign up the different possible working conditions Regulator set up with only three keys and without disconnecting the device from the supply Multiple supply frequency range either 50 or 60 Hz Main electrical parameters displayed during RUN mode Easy panel mounting without the need of tools Front frame size 144 x 144 mm according to DIN 43 700 panel hole 138 x 138 mm Measurement and power supply in one single input Four quadrant regulation suitable for installations importing or exporting energy 6 M98228201 03 14A computer MAX 6 computer MAX 12 Lagging Inductive 90 Lagging Inductive KW KW KVAr KVAr Cosp Coso 180 0 KW K
25. r of connected steps If both keys are simultaneously pushed the device displays the Nr of connected steps Remember the difference between step and stage described in paragraph 1 1 Parameters measurement Performing successive short pushing of this key lt 1 s the user can travel along several display screens showing the values of the following parameters cos cosinus of the installation 1 mains current THD THD of mains current V Mains voltage 1 MAX MAXimum value of mains current since the last clear V MAX MAXimum value of mains voltage since the last clear The displayed parameter is pointed by the cursor Parameters measurement Performing successive short pushing of this key lt 1 s the user can travel through the readings of the same parameters described above but in reverse order Start the SET UP mode Performing a long push of this key lt 1 s the device jumps to set up mode Clear MAX values Performing a long push of this key lt 1 s while the cursor P is pointing to MAX the Computer 4X clears the MAXimum values of voltage and current recorded since the last clear 18 M98228201 03 14A computer MAX 6 computer MAX 12 7 2 Computer MAX behaviour in ALARM mode In case that the Computer MAX detects an error during normal operation see paragraph 3 2 the screen displays an error code and the behaviour of the device is as described in table 7 1 ERROR message Table 7 1
26. rogramming the CT rated current primary The set up of this parameter can be selected at the bottom of the menu options Use the D Y keys until the bottom red LED is flashing and push O The display will show the assumed CT primary current Set the value according to the CT used to measure installation current The adjustment range is from O to 999 and with the x10 option allows a rated primary current up to 9990 A By default the secondary of CT is assumed to be 5 A 6 SET UP MENU AND PROCEDURE 6 1 How to access the set up menu To access the set up menu press the key O for more than 1s This is designated as long push in table 6 1 which gives a summary of the set up procedure The pointer gt starts blinking and points to the parameter to be adjusted Select the parameter by means of the keys D Y After the long push and in case that all the capacitor stages are disconnected the device jumps to the set up status In case that there are some stages connected keep the key O pushed while the regulator disconnects the connected stages sequentially and respecting the programmed delay time Once all the stages have been disconnected the device enters the set up status and allows the adjustment of the different parameters A schematic diagram of the set up menu showing the different navigation paths is shown in table 6 1 The meanings of the different adjustable parameters have been explained in paragraph 5 1 16 M98228201 03 14A
27. s of each Country as well as the different warnings stated in this instruction manual 4 1 Technical Characteristics The main technical characteristics of every particular computer MAX 6 and computer MAX 12 device are printed in the rear label see fig 1 2 and are also summarized in the following table 480 400 230 or 110 Vas 15 10 depending on model voltage Terminals C D 45 65 Hz Connect preferably to phases L2 L3 Current measurement circuit External Current Transformer CT Current ratio 5 To be placed Terminals A B preferably in phase L1 Cables for the current Minimum cross section 2 5 mm If cable length between regulator measurement circuit CT and CT must exceed 25 m increase the cross section by 1mm every secondary side 10 m or use a CT with a higher primary rated current 0 05 to 5A MAXimum overload 20 Voltage and Current 1 cos 2 1 digit 0 85 ind A 0 85 cap Default setting 1 110 V 7 VA no load 8 8 VA 6 relays 10 VA 12 relays Power Consumption 230 V 7 4 VA no load 8 2 VA 6 relays 9 9 VA 12 relays depending on model 400 V 5 VA no load 6 6 VA 6 relays 8 8 VA 12 relays 480 V 8 7 VA no load 9 5 VA 6 relays 10 7 VA 12 relays Screens A line x 3digitsx 7segments 20icons relays output breaker 6 A curve C or fuse 6 A gl type the highest number relay is by default configured as alarm relay EN 61010 EN 61000 3 2 EN 61000 3 3 EN 50081 2 EN 5
28. tion process to gather the following capacitor bank parameters Phase 5 8 and C K factor 5 3 Once the unit s Plug amp Play process has finished and no error has occurred during the process the calculated C K factor and the measured cosine phi will be displayed on the screen the result of having correctly configured the phase relationships 2 times each If an error occurs during the process the following screen will appear Conditions for the correct operation of the Plug amp Play function The system should be maintained with an inductive cosine of 0 62 to 0 99 throughout the process The power in the system should be stable Any major load changes gt 10 in less than 20 seconds would result in an incorrect calculation of the capacitor power ratings There must be enough current in the system at the regulator s input e gt 100 mA AC If the load is unbalanced the correct operation of the Plug amp Play function will depend on the phase to which the current transformer is connected The correct values for Program 5 5 and Number of steps 5 7 must be configured beforehand 5 2 Target cos To set up this parameter use the keys Y Y until the cursor gt points to the option fl COS then push O The parameter allows the setting of the desired PF in the installation The regulator will control the connection of the necessary number of capacitors to get the MAXimum approach to the target value Since the regulat
29. uipment and or other equipment connected to mains v The adjustment or replacement of components or parts of the unit must be made with original replacement parts and in accordance with the procedures described in the corresponding instruction manual 1 1 Delivery spot check After unpacking the equipment check the following points Check that equipment has not suffered any damage during transport The equipment corresponds to type you ordered See label at the rear face fig 1 1 Check that the characteristics in the label are suitable for the site where the regulator has to be installed Supply voltage and frequency measuring range etc Follow the instructions in section 3 for installation and set up If you may observe any anomaly during the installation or set up contact with CIRCUTOR technical service M98228201 03 14A computer MAX 6 computer MAX 12 AB COM1 2 3 45 6 C D POWER vel DSOHS0SS looe rr si Ts2 Pore Ty 0 400V Gy Il Terminals available only for computer max 12 12 relays Py po RELAY C1 08 e E 2 eS Number of outputs indication a depending on type va computer max6 6 relays TS o computer max 12 12 relays 1svo0s7 CE COM 7 3 91001112 Made in EU Supply and measuring voltage Power Supply 400Vac 50 60Hz 9 5VA Measure L1 5A L2 L3 400Vac Relay Out 250 Vac 10A a Output relays characteristics Serial no Fig 1 1
30. w the set up of the regulator The navigation keys have different functions depending on the regulator status 3 5 1 Key functions in normal RUN status Key to enter set up mode After a long push gt 1 s of this key the device will enter the set up mode and will accept configuration changes Manual connection of capacitor stages If this key is pushed for more than 1s the regulator starts connecting new steps in a sequential mode respecting the adjusted connection times fo Manual disconnection of capacitor stages If this key is pushed for more than 1s the regulator starts disconnecting steps in a sequential mode respecting the adjusted disconnection times toy 3 5 2 Key functions in SET UP status Long Push gt 1 s This is to initiate or exit the set up mode Exiting the set up mode with a long push gt 1 s will automatically save the changed parameters Exiting with a short push will not save the changes Long Push lt 1 s This is used to initiate or exit the different set up sub menu options different configurable parameters Warning The new programmed values are not saved unless a long push of this key gt 1 s is used to exit the set up menu Start Plug amp Play process Upwards navigation in the menu options available in the set up menu Increment of numerical values inside the set up sub menus Downwards navigation in the menu options available in the set up menu Decrement of numerical values ins
31. witching programs Other switching programs are also commonly available like 1 2 2 4 or 1 1 2 2 etc Abbreviated designation form as can be deduced from previous cases consists of a sequence of numbers giving the relationship between the different stage powers kvar and the first stage power which value is taken as unit 1 The successive stages will be designated by 1 or 2 or 4 etc meaning that the kvar ratio of such stages with regard to first stage are equal twice four times etc 1 3 5 Plug amp Play When a reactive energy regulator is installed a series of parameters must be configured for its correct operation Some of these parameters might be hard to know such as for example the voltage phases or the voltage corresponding to the current measured as well as the current transformer ratio The Computer MAX features a smart automatic process that detects the necessary parameters such as C K calculates the ratio between the current transformer and the power of the smallest step Phase identifies the phase sequence between voltages and the correspondence with the connected current 2 GENERAL CHARACTERISTICS The power factor regulators of types Computer MAX 6 and MAX 12 measure the cos sometimes called Displacement Power Factor DPF in a supply network and control the connection and disconnection of power capacitors in order to regulate such parameter The difference between the two types is the number of out
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