SPAJ 160 C Capacitor protection relay
Contents
1. SGB 1 SGB 2 SPAJ 160 508 3 SGB A y SGB 5 erena mae SGB 6 RELAY RESET Lo o oo i U1 SPCJ4D40 1 Fig 8 Complete connection diagram for the capacitor bank protection relav SPAJ 160 C with all the relay matrix and blocking control input programming switches shown U aux A B C D E F IRF SGB1 TRIP SIGNAL 1 SIGNAL 2 START RECONN INHIBIT U1 U2 U3 RXTX T1 T9 SPA ZC Auxiliary voltage O utput relays Self supervision Switchgroup for the configuration of the blocking and control signals Trip output relay output 65 66 Signal on tripping Signal on tripping Signal on starting Connection inhibited in fault conditions Capacitor bank protection relay module SPCJ 4D 40 Power supply and output relay module SPTU 240 R2 or SPTU 48 R2 with a normally open trip contact Input module SPTE 4E3 Serial communication interface O peration indications Bus connection module e m n o Made in Finland Fig 9 Rear view of relay SPAJ 160 ABB Automation Connections ABB Automation Function 10 11 65 66 68 69 77 78 74 15 70 71 72 Phase current 1 5 A Phase current 1 1A Phase current gt 5 A Phase current gt 1 A2. app 6 O s Xx 3 lt 1 5 1 50Hz 5 Tis Ija Ale IRF 1 A 60Hz 98556 C 7 LI 80 265 e Qui PEST 18 80V Uaux TRUM SPCJ 4040 REGISTERS OPERATION IND talma o o o o e 1 M t rec 1 Iuin 1 1a gt ALARM 2 talin 2 Ig START eid 3 lis In 3 IpoTRIP beard 4 1 gt 4 gt ALARM kA 5 t Ip 26 5 Ala START Ars Alal 6 Alc AI n 96 6 Alz gt TRIP PROGRAM 7 1 gt 7 1 lt ser 8 gt 8 RECONN INH 9 lt 9 EXTERN TRIP e O sen U J Ore 3 J 8 OGS CSer No X8 SPCJ 4040 J A The indicator TRIP is lit when one of the protection stages operates W hen the protection stage returns the red indicator remains alight B If the display is dark when one of the pro tection stages la gt or lp gt request for tripping thefaultv phaseisindicated with a yellow LED If for instance the TRIP indicator glows red and the indicators 1 1 and are ON at the same time overcurrent has occurred on phase LI and L2 C Besides being a code number at data presen tation theleftmost red digit in the display serves as a visual operation indicator An operation indicator is recognized by the fact that the red digit alone is switched on T he operation indi cation from a start or the re
3. gt o gt o D Oo DD 0 o tk l 4 gt 5 a 2 m 2 g 2 z D E E Az E um 2 i JJ ON v v v v v gt o o o m Fig 10 Control signals between the modules of the capacitor bank relay SPAJ 160 T hefunctionsof theblocking starting and trip the setting menu of the measuring relay mod ping signals are selected with the switches of ule T he functions of the different switches are switchgroups SGF SGB1 3andSGR1 2 The explained in the user s manual of the measur checksums of the switchgroups are found in ing module SPCJ 4D 40 ABB Automation Abbreviations of signal names ABB Automation L IL2 13 BS1 BS2 RRES 551 552 553 51 52 AR1 3 IRF 551 SGF SGB1 3 SGR1 2 Rx T x Phase currents Phase unbalance current Compensated phase unbalance current External blocking or resetting signals Starting Signal 1 Starting Signal 2 Starting Signal 3 Tripping Signal 1 Tripping Signal 2 Auto Reclose starting signals not used in SPAJ 160 C Internal Relay Fault signal Starting Signal 1 Switch Groups for functions Switch Groups for blockings Switch Groups for relay configuration Receiver Transmitter channel 11 Operation indicators 12
4. Phase current j 5 A Phase current 1 Phase unbalance current 5 A Phase unbalance current 1 A Auxiliary supply voltage At d c auxiliary supply voltage the positive lead is con nected to terminal 61 Protective earth Blocking and control input Can beused asan external blocking input inhibiting overload phase unbalance or undercurrent protection As an control input it can be used for an external trip signal for unlatching the trip relay and for the recon nection inhibit relay The function is selected with SG B switches in the protection relay module O utput relay A is a heavy duty relay which provides CB tripping commands A latching function of the output relay A can be selected by means of switches SGB1 6 and SG B1 7 Switch SGB1 6 gives a latching function after an overload tripping Switch SG B1 7 provides latching function after a phase unbalancetrip T helatched output relay can be reset locally or by remote control Theundercurrent unit can be madetripping with switch SGF 2 Also theoverload stage gt can be made tripping with switch SG F 1 Thesignalsto berouted to output relays B and C areselected with switches 5 8 of 80 81 switchgroup T he signals to be routed to output relays B and C are selected with switches 5 8 of switchgroup SGR1 and switches 1 8 of switchgroup SGR2 of the measuring module Normally overload stage Ip start signal is linked to relay C and the overload stage gt ala
5. Technical data modified 96 11 15 M aintenance and nennen nnne nnne nn 18 SPAS POI LC 18 ta idrat ia ae ta ise ke etta 18 Dimensons and instructions for MOUNTING ccce meten rtr hin e 19 Information required with 19 T he complete user s manual also includes the following documents General characteristics of D type relay module 1M RS 750066 MUM EN Capacitor bank relay module type SPC 4D 40 1M RS 750065 MUM EN Characteristics One two and three phase overload stagewith Fully selectable output relay configuration definite time charcteristic One two and three phase overload stage with inverse AN SI time charcteristic Phase unbalance protection stage with definite time charcteristic Phase unbalance protection stage with inverse time charcteristic Undercurrent protection for detection of capaci tor disconnection Reconnection time with wide setting range Compensation for natural unbalance current Easy selection of appropriateoperational scheme for various applications Numerical display of setting values current measured values memorized values etc Continuous self supervision of hardware and software ptical serial communication over the SPA bus provides access from a higher level central unit to all set and measured values and to memo rized fault values Vario
6. which reduces the gree of protection by enclosure of the cover is depth behind the panel by thesamedimension also IP 54 T hetype designation of the raising frames are SPA ZX 111 for the 40 mm frame SPA ZX A terminal strip and two multipole connectors 112 for the 80 mm frameand SPA ZX 113for mounted on the back of the relay case to the 120 mm frame A surface mounting case facilitate all input and output connections To SPA ZX 117 is also available each heavy duty terminal i e measuring input power or closing output one6 mm one4 mm The relay case is made of an extruded beige or oneor two 2 5 mm wirescan beconnected aluminium profile No terminal lugs are needed T hethree signal ling inputs are available on a six pole detach A cast aluminium alloy mounting frame with able connector and the serial bus connection is rubber gasket provides a degree of protection using a 9 pin D type connector by enclosure to IP 54 between the relay case and the panel surface when the relay is panel mounted 250 142 B 216 2 34 3 186 P d 8 154 129 1 6 mu o Panel cut out 82 L Raising frame a b SPA ZX 111 176 74 SPA ZX 112 136 114 SPA ZX 113 96 154 Information Example required with order ABB Automation 1 Quantitv and tvpe designation 2 Ordering number 3 Rated frequency 4 Auxiliary voltage 5 Accessories 6 Special requirements 15 pcs SPAJ 160 C RS611051 AA fn 250Hz U aux 7110 V
7. 1 2 4 5 7 8 25 26 5A 20A 500 A 750 A lt 20 70 71 72 68 69 77 78 80 81 250 V dc ac 5A 10A 8A 1A 0 25A 0 15A AgCdO 2 10 11 18 265 V dc or 80 265 V ac 2mA 80 265 V dc ac 18 80 V dc on request 4W 6W 15 16 Protection units of module SPCJ 4040 verload stage p gt Starting current p gt Starting time O peration characteristic Time multiplier Resetting time D rop off pick up ratio O peration time accuracy 21 0 1g 0 50 1 50 x In O peration accuracy Shortest possible trip time verload stage gt Starting current I3 O perating time Resetting time D rop off pick up ratio O peration time accuracy O peration accuracy Undercurrent stage lt Starting current lt O perating time Reconnection time Pulse shaped tripping signal pulse length Pick up drop off ratio O peration time accuracy O peration accuracy Phase unbalance 1 gt Stage 1 Starting current Al 1 O perating time Resetting time D rop off pick up ratio peration time accuracy Alcs 0 peration accuracy Al cs 0 Phase unbalance Al 2 Stage 2 Starting current Al 5 Starting time O peration characteristic Time multiplier kaz Resetting time D rop off pick up ratio O peration time accuracy of theoretical characteristic Al 0 peration accuracy Al cs 0 Shortest possible trip time Setting of compensation O
8. SPA 160 Capacitor protection relav User s manual and Technical description HD ED SPAJ 160 80 265 18 80 Uaux ta B SPCJ 4040 ide LJ ta min REGISTERS OPERATION IND i oj ojo o jo 112 lis In t Ia 99 t Ip 76 Alc 1 n 96 t Al gt t 15 96 t I 96 l a ALARM I p START p TRIP 4 ALARM Al 2 START Al 2 TRIP 1 lt OPERATION B Automation IMRS 750064 MUM EN Issued 95 05 02 Modified 97 10 16 Version D Checked GL Approved YK SPAJ 160C Capacitor protection relay Data subject to change without notice Contents 2 Areaiof application modified 97 10 riris enssins 3 Description of operation modified 96 11 eee 5 Connection A 7 Mona CR 9 Control signals between mOOUI BS etin costo i 10 Abbreviations of signal names 4 11 MIC ALON 12 Power supply and output module eee 14
9. appears on the dis play of the module T he fault code consists of a red figure one and a green code number this cannot be erased from the display of the mod ule by resetting W hen a fault occurs the fault code should be recorded and stated when serv ice is ordered 13 Power supplv and output relav module 14 To beable to operate the relav needs a secured auxiliary voltage supply T hepower supply mod ule forms the voltages required by the measur ing relay module and the auxiliary relays T he withdrawable power supply and output relay moduleislocated behind the system front panel which is fixed by means of four cross slotted screws The power supply and output relay modulecontainsthe power supply unit all out put relays the control circuits of the output re lays and the electronic circuitry of the external control signals T he power supply and output relay unit can be withdrawn after removing the system front panel The primary side of the power supply module is protected with a fuse F 1 located on the PCB of the module The fuse size is 1 A slow The power supplv unit is a transformer con nected i e galvanically isolated primary and secondary side flyback type dc dc converter It formsthe dc secondary voltages required by the measuring relay module that is 24 V 12 V and 48 V T heoutput voltages 12V and 24 V are stabilized in thepower supply module while the 5 V logic voltage required by the meas
10. connection inhibit is always replaced by a new operation indica tion On the other hand an operation indica tion from a stage connected to the trip relay A can not be replaced by a new operation indica tion In order to enable reading of actual cur rent levels etc when reconnection time is run ning it is possible to acknowledge the indica tion 8 whiletheunit isstill activated T he same appliesto the external trip indication 9 In these cases the indications are memorized and reap pear when the display is dark O peration indi cator 8 is automatically reset when the capaci tor bank is reconnected T he following table named O PERATION IND on therelay front pane is a key to the operation indicator code numbers used Indication Explanation Ia alarm Ip start Al 1 alarm gt start Aloe trip CO O Ui 4 CJ h2 rA trec EXT TRIP T he overload stage gt has given an alarm T he overload stage 1p has started Ip trip T he overload stage p has tripped T he stage Al has given an alarm T he stage Al has started T he stage Al2 gt has tripped lt operation T he stage lt has operated T he reconnection inhibit is active indication is self reset A trip from an external relay has been carried out via the relay ABB Automation Automation D The operation indicator on the display and the TRIP indicator persist when the protec tive stage return
11. dc 15 pcs matching modules SPA ZC 21 2 pcs fibre optical cables SPA ZF 100 19 AA HD ABB Substation Automation P O Box 699 FIN 65101 VAASA Finland Tel 358 0 10 22 4000 Fax 358 0 10 22 41094 www abb com fi 1MRS 750064 MUM EN
12. elay contains chemically active gases or dust the relay should to be visually inspected in association with the relay secondary test or whenever therelay modules are withdrawn from the case At the visual inspection the following things should be noted Signs of mechanical damage on the relay mod ules contacts and relay case Accumulation of dust inside the relay cover or case remove by flowing air carefully Rust spots or signs of erugo on terminals case or inside the relay On request therelav can be given aspecial treat ment for the protection of the printed circuit boards against stress on materials caused by abnormal environmental conditions If the relay failsin operation or if the operating values remarkable differ from those of the relay specifications the relay should begiven a proper overhaul M inor measures can be taken by per sonnel from the instrument work shop of the customer s company e g replacement of auxil iary relay modules All major measures involv ing overhaul of the electronics are to be taken by the manufacturer Please contact the manu facturer or his nearest representative for further information about checking overhaul and recalibration of the relay N ote Static relays are measuring instruments and should be handled with care and protected against moisture and mechanical stress espe cially during transport Spare parts Capacitor bank protection relay module Power and output
13. g T he trip stage is based on in verse time characteristic and the inverse curve is based on AN SI IEEE C 37 99 and IEC 871 1 recommendationsfor the capacitor banks volt age withstand related to time T he gradient of the curve can be changed by a k factor within the range 0 2 2 0 T healarm stage has a definite time characteris tic Both the starting value and the operating time are available for setting To match the re lay to the rated current of the capacitor bank a correction setting value is available By using this setting value it is possible to multiply the signal from thecurrent transformers by a factor within the range 0 30 1 50 The undercurrent protection operating with definitetime characteristic is detecting a possi ble undercurent in the capacitor bank W hen all three phase currents are opeating below the starting value and the operating time has elapsed the output alarm will be activated The recon nection inhibit function connected to the un dercurrent protection will be activated at the same time T he reconnection inhibit signal will be active until the set time has elapsed and is used to inhibit the reconnection of a charged capacitor bank to alive network Both the sart ing value and the operating time for the under current protection and the setting time for the reconnection inhibit are available for setting The unbalance protection measures only the basic frequency component of the current T he
14. ls between the modules 10 T he figure below schematicallv illustrates how the closing and alarm signals are connected be tween measuring and output relay module S Igd5S v Id0S 2 185S aX ez 111998 XK ME 8 JE gt o viv gle T PO 4 gt gt o 1205 ija EHHE doo z x o E 52 2 5 E lt V Y iu i rag fr 2 X 0 D li o lt l j Es m N E Yig L Ti 3 2 i 4 E B 3 E i i Jojn qo qo oo gio oio DDO olo Jolo Q0 olo Jolo H 218 38 932 923 21812 elm ele sl il ZI 4 o als my i i i i 1 2 H N 1 es i i i i 8 w O E H _ lt j _ U D i vo 89 88 FE 22 E z 89 Xl 983 0 70 cC 5 _ io
15. peration accuracy minimum recommended 3 0 Al 0 30 1 50 X Ig 80 ms AN SI inverse 0 2 2 0 100 ms 20 95 10 of theoretical value or 50 ms 3 of set value 100 ms 80 120 x Ip 0 50 100 min 250 ms 20 95 2 of set value 3 of set value 0 10 0 70 X 1g 1 0 100 s 0 50 100 min 200 ms ell 2 of set value 75 ms 3 of set value within range 0 25 0 70 xI n 1 0 100 Al 7 1 0 300 100 ms 20 90 2 of set value or 75 ms 3 of set value within range 1 5 100 Al 2 0 80 0 Al 7 lt 70 ms Inverse time 0 1 1 0 100 ms 20 90 7 5 or 35 ms 3 of set value 100 ms 0 0 20 096 Aln 3 of Aln ABB Automation Data transmission Transmission mode D ata code D ata transfer rate selectable Electrical optical bus connection module powered from the host relay for plastic core cables for glass fibre cables Electrical optical bus connection module powered from the host relay or an external power source for plastic core cables for glass fibre cables Test voltages D ielectric test voltage according to IEC 255 5 Impulse test voltage according to IEC 255 5 Insulation resistance according to IEC 255 5 Disturbance tests H igh frequency 1M H z disturbance test according to IEC 255 22 1 class 111 common mode differential mode Fast transients according to IEC 255 22 4 class and IEC 801 4 level 4 power s
16. protection function includes two stages of which oneis alarming and the other tripping To im prove unbalance detection in the capacitor bank the relay is provided with a settable compensa tion of natural unbalance Both the amplitude and phase angleare compensated T hetrip stage is based on inverse time characteristic and the curve has similar gradient to the normal inverse curve T he starting value can be set within the range 2 80 of the nominal input current of the relay The gradient of the curve can be changed by the k factor within the range0 1 1 It is possible to increase the inverse characteris tic time by a factor 10 by setting switch SGF 6 to position 1 T he signal stage has a definite time characteris tic Both the starting value and the operating time are available for setting By using the un balance compensation natural unbalance cur rents within the range 1 20 of the relays nominal input current can be compensated By appropriate programming of the output re lay matrix various starting alarm or reconnec tion inhibit signals are received as contact func tions T his contact information is used e g for the blocking of co operating protective relays located upstream for connection to annuncia tion units etc T he capacitor bank relay contains one external logic control input which isactivated by a con trol signal of the auxiliary voltage level T hein fluence of the control input on the relay is de
17. relay module U aux 80 265 V ac dc U aux 718 80V dc Relay box complete with input module Input module as separate part Bus connection module SPC 4D 40 SPTU 240 R2 for NO trip contact SPTU 48 R2 for NO trip contact 4E3 SPTE 4 SPA ZC 17 or SPA ZC 21_ Ordering numbers 18 Capacitor bank protection without testswitch SPAJ 160 C RS 611 051 AA CA DA FA Capacitor bank protection with testswitch type RT XP 18 SPAJ 160 RS 611 251 AA CA DA FA T he last letters of the ordering number indicate the rated frequency fp and the auxiliary voltage range U aux of the relay as follows AA equalsf 50 H z and U aux 80 265 V ac dc CA equalsf 50 H z and U aux 18 80 V ac dc DA equalsf 260 H z and U aux 80 265 V ac dc FA equalsf 60 H zand U aux 18 80 V ac dc Power supply and output relay modules SPTU 240 R2 SPTU 48 R2 RS 911 021 AA RS 911 021 BA ABB Automation Dimensions and instructions for T herelav is housed in anormally flush mounted case T he relav can also be arranged for semi The relav case is completelv with a hinged gasketed clear U V stabilized polvcarbonate mounting flush mounting with theuseof a40 mm 80 mm cover with a sealable fastening screw T he de or 120 mm raising frame
18. rm signal is linked to output relay B The signals to be routed to the output relay D are selected by means of switches 1 4 of switchgroup SGR1 Switch SGR1 1 links the overload gt alarm switch SGR2 2 links the oveload 15 start switch SGR2 3 links the phase unbalance alarm of stage gt and switch SGR2 4 links the phase unbalance start signal of stage Al to output relay D O utput relay E isa heavy duty output relay capableof controlling a circuit breaker Relay E isnormally used for controlling the reconnection of the capacitor bank If thereconnection inhibit signal is activethe output relay E prevents a reconnection attempt of the capacitor bank T his also appliesto a condition where the protec tive relay is out of auxiliary voltage or the relay is faulty Output relay operates as an self supervision output relay Under normal condi tions the relay is operated and the contact gap 70 72 is closed If a fault is de tected by the self supervision system or if the auxiliary supply fails the output relay drops off providing an alarm signal by closing the N O contact 71 72 T herelay isinterfaced with the SPA serial com modulesSPA ZC21 or SPA ZC 17 therelay can munication bus through a 9 pole D type belinked to the serial busand further to a con subminiatureconnector located at the rear pand trol data communicator e g SACO 14804 or of the relay By means of the bus connection SRIO 500 1000M Control signa
19. sto normal T heindicators are reset by pushing the RESET STEP push but ton Further the indicators may be reset via the ex ternal control input 10 11 by applying a con trol voltage to the input provided that the switch SG B1 8 isin position 1 T hebasic protective relay functions are not de pending on the state of the operation indica tors i e reset or non reset T he relay is perma nently operative If stage Ip or Al starts but no tripping oc curs because the energizing quantity goes be low the starting level before the delay circuit times out the starting indications are automati cally switched off H owever by means of the switches SG F 3 4 thestarting indications may be persistent which means that they are to be reset by pushing the RESET ST EP push but ton The persistent indications are obtained through the following programming Switch SGF 3 1 Starting indication on Ip persistent Switch SGF 4 1 Starting indication on Al persistent On ddivery from factory the switches SG F 3 4 0 heself supervision alarm indicator IRF in dicates that the self supervision system has de tected apermanent fault T heindicator activates with a red light about 1 minute after the fault has been detected At the sametimethe plug in module delivers a signal to the self supervision system output relay of the protection assembly Additionally in most cases a fault code show ing the nature of the fault
20. ted on the system front panel ABB Automation Technical data modified 96 11 ABB Automation Energizing inputs Phase and neutral current inputs terminals Rated current l T hermal withstand capability continuously forls D ynamic current withstand half wave value Input impedance Phase current monitoring range Phase unbalance current monitoring range R ated frequency Output contact ratings Reconnection enable and trip contact Terminals Rated voltage Carry continuously Makeand carry for 0 5 s Makeand carry for 3 0 s Breaking capacity for dc when the control circuit time constant L R lt 40ms at 48 110 220 V dc control circuit voltage Contact material Start and signalling contacts Terminals Rated voltage Carry continuously M ake and carry for 0 5 s M ake and carry for 3 0 s Breaking capacity for dc when the control circuit time constant L R lt 40ms at 48 110 220 V dc control circuit voltage Contact material External control inputs Blocking and command inputs External control voltage level Tvpical control current of input circuit Power supplv and output relav module Supplv and relav module tvpe SPTU 240 R2 Supply and relay module type SPTU 48 R2 Power consumption under quiescent operating conditions l 3 4 6 7 9 25 27 1 100 A 250A 100 0 8 5 X a 0 21296 Aln 50 60 Hz 65 66 74 75 250 V dc ac 5A 30A 15A 5A 3A 1A AgC dO 2
21. termined by programming switches of the meas uring module The control input can be used either for blocking one or more of the protec tive stages for carrying out an external trip or der for inhibiting a reconnection attempt or and for resetting a latched output relay in the manual reset mode T he protective relay is provided with a man machineinterfaceon thefront panel T heman machineinterface shows rday acti vation s meas ured values maximum value registrations start ing counters time counters and setting values changes of setting values can be made by using the push buttons on the front panel Through the serial busthe man machine com munication can be obtained either by using a PC with a setting tool program a SCS local control system or a microSCAD A remote con trol system IL1 TRIP gt OVERLOAD PROTECTION SIGNAL 1 IL2 COMPENSATION FOR NATURAL PHASE UNBALANCE SIGNAL 2 IL3 CAPACITOR BANK PROTECTION START WITH ALARM TRIP STAGE RECOCONNECTION UNDERCURRENT DETECTION ENABLE FOR RECONNECTION INHIBIT 37 IRF CONTROL RECONNECTION INHIBIT TIMER INPUT BS1 SERIAL I O SERIAL COMMUNICATION Fig 7 Checking functions of the capacitor bank overload and unbalance prot relav SPAJ 160 C ABB Automation Connection diagram ABB Automation INPUT uw CONTROL IRF START SIGNAL 2 SIGNAL 1
22. upplv inputs other inputs Electrostatic discharge test according to IEC 255 22 2 and IEC 801 2 class 111 air discharge contact discharge Environmental conditions Specified ambient service temperature range Temperature influence on the operating values of the relay over the specified ambient service temperature range Long term damp heat withstand according to 68 2 3 Transport and storage temperature range D egree of protecting by enclosure of the relay case as per IEC 529 when panel mounted M ass of the relay Fibre optic serial bus ASCII 4800 Bd or 9600 Bd SPA ZC 21 BB SPA ZC21MM SPA ZC 17 BB SPA ZC 17MM 2 0 kV 50H z 1 min 5 kV 1 2 50 us 0 5 J 2100 MQ 500 V dc 4 kV 5 50 ns 2 kV 5 50 ns 8 kV 6 kV 10 55 lt 0 2 C lt 95 at 40 C for 56 d a 40 70 C IP 54 3 5 kg The insulation and disturbance tests do not apply to the serial port which is used for the bus connection module only 17 Maintenance and repair W hen the synchrocheck relay is operating un der theconditionsspecified in thesection Tech nical data therelay is practically maintenance free T herelav modulesincludeno parts or com ponents subject to an abnormal physical or electical wear under normal operating condi tions If the environmental conditions at the relay Operating site differ from those specified as to temperature humidity or if the athmosphere around the r
23. ur ing relay module is formed by the stabilizer of the relay module 1A slow Uaux 80 265 V ac amp dc 18 80 V dc 48V Unstabilized logics voltage 12V Operation amplifier voltage kin Output relav coil 24 voltage Fig 11 Voltage levels of the power supplv module A green LED indicator U auxon thesvstem front panel is illuminated when the power supplv module is in operation T he supervision of the voltages supplving the electronics is placed in the measuring module If a secondary voltage deviates from its rated value by morethan 25 96 a selfsupervision alarm will be established An alarm is also received when the power supply module is withdrawn from the relay case or when the auxiliary power supply to the relay is interrupted T herearetwo versionsof the power supply and output relay modules available For both types the secondary sides and the relay configurations are identical but the input voltage ranges dif fer Insulation test voltage between the primary and the secondary side and the protective earth 2 kV 50 Hz 1min Rated power Pp 5W Voltage ranges of the power supply modules SPTU 240 2 80 265 V ac dc SPTU 48 R2 U aux 718 80 V dc on request The module SPTU 240 R2 can be used with both ac and dc voltages M odule SPTU 48 R2 is designed for dc supply only The auxiliary voltage range of the power supply module of the relay assembly is indica
24. urrent measurement In this case a non directional earth fault protection is used e g SPAA 120 C or SPAA 121 C SPAJ 160 C Fig 4 Protection of a one phase bridge connected capacitor filter bank ABB Automation Description of operation modified 96 11 ABB Automation T heprotectiverelav measures the phasecurrents of the capacitor bank one two or three phase T he currents are internally transformed by the relay to signalsthat will bedirectly proportion ally to the voltages over the bank T herelay is also measuring the unbalance cur rent that may arisein a capacitor bank T hein put current isin this case measured by a current transformer connected between the starpoints in a double star connection according to fig 5 or between the branchesin asingle phase bridge connection according to fig 6 Fig 5 Fig 6 T he protective relay is a multifunction type of relay and includes functions for overload pro tection unbalance protection and undercurrent protection combined with reconnection inhibit to prevent reconnection of a charged capacitor bank to a live network T heoverload protection is mainly a overvoltage protection It measures peak values with the measured harmonics up to and including the 13th order The overload protection includes two stages ne stage is alarming and the other is for trippin
25. us events can also be se lected to be automatically read by a control data communicator and printed out ABB Automation Area of application modified 97 10 Application examples ABB Automation The main application area for the relav is to protect capacitor banks intended for reactive power compensation and filtering of the har monics The capacitor banks are usuallv protected against overload produced bv harmonic currents and overvoltage caused bv internal faults in the bank A protection against reconnection of a charged capacitor to a live network should also be included these functions can be found in SPAJ 160 C An earth fault and overcurrent protection is of ten used for selective network protection In this case an overcurrent and earth fault protection relay from the SPACO M family can be con nected to the same current transformer as SPAJ 160 eg SPAA 341 C1 SPAJ 160 C Fig 1 Protection of a capacitor bank connected as a double star in a distribution network with three phase current measurement e g SPAA 120 C or SPAA 121 SPAJ 160 C Fig 2 Protection of a capacitor bank connected as a double star in a distribution network with two phase current measurement e g SPAJ 140 Cor SPAJ 141 SPAJ 160 C Fig 3 Protection of a capacitor bank connected as a double star in an industrial network with two or three phase c
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