Combined overcurrent & earth-fault relay type SPAJ - ABB Group

Combined Overcurrent andEarth-fault RelaySPAJ 140 CProduct Guide

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGIssued: April 1999Status: UpdatedVersion: C/18.04.2006Data subject to change without noticeFeatures • Three-phase, low-set phase overcurrentunit with definite time or inverse definiteminimum time (IDMT) characteristic• Three-phase, high-set phase overcurrentunit with instantaneous or definite timeoperation• Low-set earth-fault unit with definite time orinverse definite minimum time (IDMT) characteristic• High-set earth-fault unit with instantaneousor definite time operation• Built-in circuit-breaker failure protection• Two heavy-duty and four signal outputrelays• Output relay matrix allowing start or trip signalsfrom the protection stages to be routedto the desired output relay• Local display of measured and set valuesand data recorded at the moment of a fault• Reading and writing of setting values eithervia local display and front panel push-buttonsor from higher-level systems over theserial interface and the fibre-optic bus• Self-supervision system continuously monitoringthe operation of the electronics andthe microprocessor• Powerful software support for parameterizationof the relay, for reading measuredand recorded values, events, etc., and forstoring readings• Member of the SPACOM product familyand ABB’s Distribution Automation system• CE marking according to the EC directivefor EMCApplicationThe combined overcurrent and earth-faultrelay SPAJ 140 C is intended to be used forthe selective short-circuit and earth-fault protectionof radial feeders in solidly earthed,resistance earthed or impedance earthedpower systems. The integrated protectionrelay includes an overcurrent unit and anearth-fault unit with flexible tripping and signallingfacilities. The overcurrent and earthfaultrelays can also be used for other applicationsrequiring single-, two-, or three-phaseovercurrent protection. The combined overcurrentand earth-fault relay includes a circuit-breakerfailure protection unit.The combined overcurrent and earth-faultrelay SPAJ 140 C is part of ABB’s DistributionAutomation concept, the complete ABBsolution for the control and management ofelectric power systems.3

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGDesignThe combined overcurrent and earth-faultrelay is a secondary relay to be connected tothe current transformers of the object to beprotected. The three-phase overcurrent unitand the earth-fault unit continuously measurethe phase currents and the neutral current ofthe object. On detection of a fault the relaystarts, trips the circuit breaker, provides analarm signal, records fault data, etc., in accordancewith the requirements of the applicationand the relay configuration.When the phase current exceeds the set startcurrent of the low-set stage I>, the overcurrentunit starts and, after a preset start time, itdelivers a start signal. When the set operatetime, at definite time operation, or the calculatedoperate time, at inverse time operation,elapses, the overcurrent unit operates. In thesame way, the high-set stage I>> of the overcurrentunit starts when the set start current isexceeded and delivers a start signal after thepreset (~40 ms) start time. When the set operatetime has elapsed, the overcurrent unitoperates.When the earth-fault current exceeds the setstart current of the low-set stage I 0 >, theearth-fault unit starts and, after a preset starttime, it delivers a start signal. When the setoperate time, at definite time operation, or thecalculated operate time, at inverse time operation,elapses, the earth-fault unit operates. Inthe same way, the high-set stage I 0 >> of theearth-fault unit starts, when the set start currentis exceeded, and delivers a start signalafter the preset (~50 ms) start time. Once theset operate time has elapsed, the earth-faultunit operates.The low-set stage of the overcurrent unit andthe low-set stage of the earth-fault unit maybe given definite time or inverse definite minimumtime (IDMT) characteristic. The IDMTcharacteristic includes six time/current curvesets. Four of the curve sets comply with theBS 142 and IEC 255 and are named “Normalinverse”, “Very inverse”, “Extremelyinverse” and “Long-time inverse”. The twoadditional inverse time curve sets complywith ABB standards and are called “RI” and“RXIDG”.By appropriate configuration of the outputrelay matrix, the start signals of the overcurrentand earth-fault units are obtained as contactfunctions. The start signals can be usedfor blocking co-operating protection relays,and for signalling.The relay includes one external binary input,which is controlled by an external controlvoltage. The function of the control input isdetermined by a selector switch in the protectionrelay module. The control input can beused for blocking the operation of one ormore protection stages, for resetting a latchedoutput relay in the manual reset mode or forswitching between main and second settingbanks.Data communicationThe relay is provided with a serial interfaceon the rear panel. By means of a bus connectionmodule type SPA-ZC 17 or SPA-ZC 21the relay can be connected to the fibre-opticSPA bus. The bus connection module typeSPA-ZC 21 is powered from the host relay,whereas the bus connection module SPA-ZC 17 is provided with a built-in power unit,which can be fed from an external securedpower source. The relay communicates withhigher-level data acquisition and control systemsover the SPA bus.Self-supervisionThe relay incorporates a sophisticated selfsupervisionsystem with auto-diagnosis,which increases the availability of the relayand the reliability of the system. The selfsupervisionsystem continuously monitors thehardware and the software of the relay. Thesystem also supervises the operation of theauxiliary supply module and the voltagesgenerated by the module.When a permanent internal relay fault isdetected, the IRF indicator on the relay frontpanel is lit. At the same time the output relayof the self-supervision system operates and afault message is transmitted to the higherlevelsystem over the serial bus. Further, inmost fault situations, a fault code is shown inthe display of the protection relay module.The fault code indicates the type of the faultthat has been detected.Auxiliary supply voltageThe auxiliary supply of the relay is obtainedfrom an internal plug-in type power supplymodule. Two auxiliary power module versionsare available: type SPTU 240R1 for thesupply voltage range 80…265 V ac/dc andtype SPTU 48R1 for the supply voltage range18…80 V dc. The power supply moduleforms the internal voltages required by theprotection relay and the I/O module.4

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGTechnical dataTable 1: Energizing inputs, overcurrent unitTerminals 1-3, 4-6, 7-9 1-2, 4-5, 7-8Rated current I n 1 A 5 AThermal withstand continuously 4 A 20 Acapabilityfor 10 s 25 A 100 Afor 1 s 100 A 500 ADynamic current Half-wave value 250 A 1250 Awithstand capabilityInput impedance

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGTechnical data (cont´d)Table 4: Control input, communication and power supplyExternal control input Terminals 10-11Control voltage level18…265 V dc or80…265 V acCurrent drain at activated input2…20 mAData communication Transmission mode Fibre-optic serial busData codeASCIISelectable data transfer rates4800 or 9600 BdBus connection module, for plastic core cables SPA-ZC 21BBpowered from the host for glass fibre cables SPA-ZC 21MMrelayBus connection module, for plastic core cables SPA-ZC 17BBpowered from the host for glass fibre cables SPA-ZC 17MMrelay or from an externalpower sourceAuxiliary supply modules Power supply and I/Omodules, rated voltagesand operative rangeSPTU 240R1110/120/230/240 V ac,110/125/220 V dc,80…265 V ac/dcSPTU 48R124/48/60 V dc,18…80 V dcPower consumption under quiescent ~4 Wconditionsunder operatingconditions~6 WTable 5: Relay module SPCJ 4D29, overcurrent unitFeatures Stage I> Stage I>>Start current at definite time 0.5…5.0 × I n 0.5…40.0 × I n and ∞at inverse time 0.5…2.5 × I n –Start time, typically 50 ms 40 msOperate time at definite time characteristic 0.05…300 s 0.04…300 sTime/current characteristic at inverse mode Extremely inverse –Very inverseNormal inverseLong-time inverseRI type inverseRXIDG type inverseTime multiplier k 0.05…1.0 –Reset time, typically 40 ms 40 msRetardation time

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGTechnical data (cont´d)Table 6: Relay module SPCJ 4D29, earth-fault unitFeatures Stage I 0 > Stage I 0 >>Start current 0.1…0.8 × I n 0.1…10.0 × I n and ∞Start time, typically 60 ms 40 msOperate time at definite time characteristic 0.05…300 s 0.05…300 sTime/current characteristic at inverse time modeExtremely inverseVery inverseNormal inverseLong-time inverseRI type inverseRXIDG type inverseTime multiplier k 0.05…1.0 –Reset time, typically 40 ms 40 msRetardation time 100 MΩ, 500 V dc2.5 kV1.0 kV4 kV, 5/50 ns2 kV, 5/50 ns8 kV6 kV10 V/m, f = 80…1000 MHz10 V, f = 150 kHz…80 MHz68…265 V0…200 ms0…30 ms0…160 ms7

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGTable 7: Tests and standardsMechanical testSeismic test(ANSI/IEEE C37.98-1987),operating basis earth-quake testSeismic test(ANSI/IEEE C37.98-1987), safeshut down earth-quake testVibration testShock/bump test(IEC 60255-21-2)Corrosion test0.5…5.25 g0.5…7.5 g2…13.2 Hz, ±1.0 mm13.2…100 Hz, ±0.7 g20 g, 1000 bumps/directionBattelle testEnvironmental conditions Service temperature range -10…+55°CTransport and storagetemperature range(IEC 60068-2-8)-40…+70°CDamp heat test(IEC 60068-2-3)Degree of protection by enclosurewhen panel mountedWeight

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGBlock diagram63 1 23 4 5 6 7 89 25 26 27SPAJ 140 CL1L2L30I 0+++ (~)- (~)U aux+IRF START 1 START 2 SIGNAL 1 SIGNAL 2TRIP11 10 62 61 70 71 7274 7577 7880 8168 6965 66++++++FEDCBAU2+ -TS1SS1SS2SS3TS21111 LATCHING 1SGB/6SGB/7SGB/1U13I>IRFT1SGB/23I>>T3SGB/3Io>T5SGB/4Io>>T7SGB/5RC SETTINGS I/OSGB/8 SGF/4RESETT90.1...1sT2T4T6T8-I-1 A5 ASGR1/2SGR1/4SGR1/6SGR1/8SGR2/8U3RRx TxSERIALPORTTRIPU11 A5 A1 A5 A1 A5 ASGR3/1SGR3/2SGR3/3SGR3/4SGR3/5SGR3/6SGR3/7SGR3/8SGR1/1SGR1/3SGR1/5SGR1/7SGR2/1SGR2/3SGR2/5SGR2/7SGR2/2SGR2/4SGR2/6SPA-ZC_EXTERNALCONTROL~Fig. 8Block diagram and sample connection diagramBSPAJ1409

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGMounting anddimensionsFlush mounting1423025021618634129 ±1162136139 ±1Panel cutoutdim100Fig. 1Flush-mounting relay case (dimensions in mm)Semi-flush mountingabRaising frameSPA-ZX 111SPA-ZX 112SPA-ZX 113a17613696b74114154SFM100_1Fig. 2Semi-flush mounting relay case (dimensions in mm)Mounting in 19 inch cabinetsand framesAn ancillary mounting plate, height 4U(~177 mm), is recommended to be used whenthe protection relays are to be mounted in 19inch frames or cabinets. The ancillary mountingplate type SPA-ZX 104 accommodatesthree relays, type SPA-ZX 105 two relays andtype SPA-ZX 106 one relay.Projecting mountingWhen projecting mounting is preferred, arelay case type SPA-ZX 110 is used. Therelay case for projecting mounting is providedwith front connectors.SPA-ZX104SPA-ZX105SPA-ZX106+0,4482,6 –0 (19")SPA-ZX110SPA-ZX11510158115ø6263312292101,621,57+0,4177 –0 (4U)115698104_6_10Fig. 3Mounting cabinets and frames as well as projecting mounting (dimensions in mm)10

Combined Overcurrent and Earth-faultRelaySPAJ 140 C1MRS750361-MBGOrderingWhen ordering, please specify:Ordering informationOrdering example1. Type designation and quantity SPAJ 140 C, 5 pieces2. Order number RS 611 006-AA3. Rated values I n =5 A, f n =50 Hz4. Auxiliary voltage U aux =110 V dc5. Accessories -6. Special requirements -Order numbersCombined overcurrent and earth-fault relaySPAJ 140 C without test adapterCombined overcurrent and earth-fault relaySPAJ 140 C including test adapter RTXP 18The last two letters of the order number indicate therated frequency f n and the auxiliary voltage U aux ofthe relay as follows:RS 611 006-AA, CA, DA, FARS 611 206-AA, CA, DA, FAAA equals f n = 50 Hz and U aux = 80…265 V ac/dcCA equals f n = 50 Hz and U aux = 18…80 V dcDA equals f n = 60 Hz and U aux = 80…265 V ac/dcFA equals f n = 60 Hz and U aux = 18…80 V dcReferencesAdditional informationUser’s manual and technical description “Combinedovercurrent and earth-fault relay SPAJ 140 C”1MRS 750629-MUM EN11

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