Priority Member Indonetwork Priority
5th Year
PT. ANEKA ELECTRINDO NUSANTARA
PT. ANEKA ELECTRINDO NUSANTARA
http://indonetwork.net/pteanco
 Sell:Telemecanique RM4LG01M  Sell:NOHMI INTEGLEX FQIO1UA  Sell:NOHMI FAP 129N FIORE ALRM CONTROL PANEL  Sell:BENDER RCMA472 LYresidual current monitoring unit  Sell:BENDER W465 A26 MEASURING CT  Sell:RF4R110ACC/ 220ACC ARTECHE RELAY  Sell:MC1230 POWER LINE FILTER 30A1MA FILTER 30A BY LAMDA  Sell:ABB OT63E4N/ PE Switch Disconnector  Sell:TEST BLOCK MMLG 01  " AREVA & ALSTOM "  Sell:NJB1 Y single phase voltage  Sell:SIEMENS 3RW4436 6BC46 6T3  Sell:KYOTO KD20C40AX Relay Solid State 32 Volt DC Input 40 Amp 280 Volt AC Output 4 Pin  Sell:CHINT NJYB3 relay is used to provide overvoltage, undervoltage, phase failure, phase sequence and threephase unbalance control in three phase three wire 380V  Sell:CHINT KG10D  Sell:Weidmuller 1780.6 EGR EG2 24V SPST Relay  Sell:ABB RXMVE 1 RK 257 003  AN  Sell:ABB RXMM1 PK 214 003  AN  Sell:ABB RXEG 21 RK411102 DD  Sell:ABB RXMH2 RK223068 AN  Sell:ABB RXSF1 RK271017 AN Auxiliary, signalling and tripping relays  Sell:BENDER CES 141 undercurrent relays of the CSE141 series monitor the overcurrent in AC systems.  Sell:VSE 004 VAMP 40 RS 485 module  Sell:ENTEC Vacuum circuit recloser 15   38 kV, 630 A  Sell:7RW8020 5EB90  1DE/ BB Voltage & Frequency Protection SIEMENS  Sell:Overcurrent Protection 7SJ8042 5EB00 1FB0/ CC SIEMENS  Sell:2RMLG01/ 02 Test Block REYROLLE SIEMENS  Sell:ION 8800 POWER MEASUREMENT  Sell:Overcurrent and Earth Fault Relay ABB REJ 525  Sell:VIGI NC 100 63 A MERLIN GERIN  Sell:Fameca Voltage Detector  Sell:SIBA HHD FUSE LINK  Sell:INET SPECTRA  Sell:AUXILIARY RELAY HFA  " GE "  Sell:Ameritec AM2 A  Sell:TRANSFORMER DIFFERETIAL RELAY SEPAM 1000+ T 87 MERLIN GERIN  Sell:phoenixcontact   URTK/ SP  Sell:D SUB bus connector   SUBCON PLUS PROFIB/ AX/ SC   2744380  Sell:ERICO CRITEC TSG, SRF, 3 PH, 630A, 220 to 275V  Sell:SIEMENS 3AH5274 2 Vacuum Circuit Breakers 1250 A 25KA KA  Sell:Siemens Vaccum Contactors 3TL6  Sell:VACCUM CONTACTORS & COMBINATION UNITS MELVAC MITSUBISHI  Sell:vaccum circuit breaker  " SIEMENS " ABB  " TOSHIBA  " ALSTOM  Sell:Vaccum Contactor SIEMENS, FUJI, ABB  Sell:TAVRIDA VACCUM CIRCUIT BREAKER  Sell:GV2 MO7 Telemecanique Scheneider  Sell:ARTECHE BJ8R 110 VDC  Sell:ARTECHE RJ8R  Sell:RAYCHEM WPCZ M06079 Covalence Heat Shrinkable Products  Sell:mvtu 12C1DO751G OVER VOLTAGE RELAY  Sell:BUSSMAN BS1362  Sell:BUSSMANN FUSES  Sell:ALLEN BRADLEY 1791D8B8P  Sell:entrelec terminal block, CTT and VTT terminal block, current voltage or polarity circuits  Sell:KTA3 Motor Circuit Controller  Sell:PHASE FAILURE AND PHASE SEQUENCE RELAY XJ3 D CHINT  Sell:PHONIX CONTAC Safety Relay PSR ESL4_ B  Sell:SQUARE D FA36100 I Line 600V  Sell:CAPACITOR 32 MICROFARAD 300vac  Sell:TEC 1728 RELAY 110Vac  Sell:ICE CEF 4 MU  Sell:ICE CEF 4 a  Sell:EBERLE ITR 3 TEMPTRATURE CONTROLE  Sell:SADTEM VOLTAGE TRANFORMER TYPE YM 6  Sell:BLACK STONE BL 7916 HANNA CONTROL  Sell:TEC 1732 RELAY  Sell:GURO EKM 1261 16 AMPER 380 VOLT  Sell:MOTOR PROTECTION RELAYS MiCOM P225  Sell:MLLB 01 Multi finger Test Plug/ Single finger Test Plug  Sell:AUTONICS SD 1448 12 power supply  Sell:BROYCE CONTROL B1PA PHASE ASYMMETRY RELAY  Sell:ZB6/ WH PHOENIX CONTAC  Sell:SIEMEN 3AY1510 SE 60 OHM 32/ 12 KSC 319  Sell:KONZERV 6436  Sell:RITZ current transformer  Sell:1B230 Auto Reclose Relay  " RMS "  Sell:CHECK SYNCHRONISM RELAY KAVS 100 / MAVS 01  " ALSTOM / AREVA "  Sell:ALPES TECNOLOGIES DCRE7 DIGITAL POWER FACTOR CONTROLLER  Sell:TEC 1800 110 V DC RELAY  Sell:MULTILIN SR735 Feeder Protection Relay  Sell:ACE 850 FO  Sell:MCB ABB S262 C10  Sell:SIEMENS 3UN2110 0AN7  Sell:SIEMENS 3VU1300 1MH00 MOTOR STARTER PROTECTOR  Sell:Directional earth fault relay SPAS 120 C ABB  Sell:SQUARDE FHL 36000 15M 150A  Sell:MCCB Square D GJL36050M05  Sell:WESTINGHOUSE ELECTRIC FUSE CLE  PT STYLE 677C452G08, 14, 4KV 1E AMPS, 25/ 60HZ....80.000AMPS. SYM 130.000AMPS.ASYM  Sell:ZIEHL TR 1200 IP Pt100 Temperature Relay  Sell:FREQUENCY RELAY BENDER  Sell:BUSSMANN 12ABCNA 3.15A  Sell:ISTAT 200 & 300 ALSTHOM  Sell:SYINCRO CHECK RELAY BROYCE CONTROL 70 SCRL110vac  Sell:Yamato weighing control instrument EDI 801  Sell:Pfeiffer Vacuum DCU 600 Digital Control Unit, Turbo Pump Controller, PMC01697B  Sell:Siemens 3UF7103 1AA00 0 current measuring module  Sell:POWER METER Siemens 7KG7610 0DD01 0AA0  Sell:TRANDUCER 7KG6000 8AB/ NN SIEMENS  Sell:SIEMENS 7KG6000 8EB/ NN  Sell:SIEMENS POWER METER SIMEAS 7KG7755 0DA00 0AA1  Sell:7KE6000 8AL SYNC TRANSCEIVER AUXILIARY POWER: DC/ AC 100   230V, 45 TO 60HZ  Sell:GE PQMII T20 C A  Sell:SIEMENS 6EP1961 3BA10  Sell:SIEMENS STATIC TRIP 3 RMS TSIG TZ CP  Sell:MINILEC MBAS 0600  Sell:MINILEC Alarm Annunciators   MBAS 9400  Sell:RMS RELAY 6RJ24 10  Sell:SIEMENS 6ES7 972 0BB12 0XA0  Sell:ALEN   BRADLAY PowerMonitor 3000  Sell:SIEMENS TEST DEVICE FOR ETU 3WL9111 0AT32 0AA0  Sell:CIRCUTOR CVM 144 Power analyzers M5 29 Three phase power analyzer  Sell:SIEMENS 6AG4104 0DG24 2BC0  Sell:SIEMENS 5ST3 020 CONTACT FAULT SIGNAL  Sell:SIEMENS PBSL321 G34924...  Sell:siemens condensator 4rh5. 523Kvar, 4, 5kv  Sell:CEE RELAY ITG7296  Sell:SIMATIC Rack PC 547B  Sell:SEL 710 Intelligent motor protection relay  Sell:KAPACITOR BANK CHINT  Sell:MAUELL MR 21  Sell:RELAY XR153 D.C. SUPPLY SUPERVISION SINGLE ELEMENTSIEMENS/ REYROLLE  Sell:XR152 & XR153   7PG17 REYROLLE  Sell:NS8 TV00 OMRON Advanced Touch Screen  Sell:SITRANS LU02 SIEMENS  Sell:WOODWARD SPM A SYINCRONIZER 9987 028 REV E  Sell:KABEL H07RN F HELUKABEL  Sell:cable NYYHY....HELUKABEL  Sell:STEP DOWN TRANSFORMER  Sell:RECLOSER 27KV 38KV TAFRIDA  Sell:SIEMENS 7XV5655 0BA00 Serial Hub Ethernet hub  Sell:AUXILARY REALAY MVAA  " AREVA / ALSTOM  "  Sell:MBDHT2510+ MHMD042P1U Panasonic servo  Sell:SELCO M2000 10 00B  Sell:AREVA DIP 5000 Comprehensive universal teleprotection for power networks  Sell:MULTILIN LM 10 motor ptrotection system GENERAL ELECTRIC  Sell:SOLIT STATE RELAY HANYOUNG HSR 3D302Z  Sell:OBO RJ45S ATM/ 8 IND FINE PROTECTION  Sell:LEONI SURGE ARRESTER S45055 Z61 A439 LA A T  Sell:NEUTRAL GROUDING RESISTORS ( NGR)  Sell:CVT CAPACITOR VOLTAGE TRANFORMER MEDIUM AND HI VOLTAGE  " KONCAR "  Sell:CURRENT TRANSFORMER 150   800KV KONCAR  Sell:KONCAR POWER AND DISTRIBUTION TRANFORMERS  Sell:AT& T IAS  412 NT1 NETWORK TERMINATION UNIT MODULE  Sell:DEIF TDG 210DG  Sell:MICOM 591  Sell:GE MULTILIN EMP 5500P P POWER METERING SYSTEM  Sell:RUGGEDCOM RMC HI TXFXMMLC  Sell:LOVATO RGK 60 Generating set controller  Sell:MiCOM M231 Communicating Measurement Centre Service  Sell:UNIVERSAL PROFESSIONAL MODEM AJ 2885 CXR ANDERSON JACOBSON  Sell:ARTECHE Auxiliary relays RJ8DI  Sell:ARTECHE BJ8BB 220VCC  Sell:7PA2231 1   Fast LOCK OUT Relay   Siemens  Sell:ARGUS 1 REYROLLE 7SG11  Sell:TR241 REYROLLE SIEMENS  Sell:REYROLLE 7PG1522/ TR 221 High Speed Tripping  Sell:TELESCOPIC HOT STICK RIZT  Sell:SURGE PROTECTION  " DEHN " OBO BATTERMANN " ABB " MG.  Sell:VOLTAGE DITECTOR DEHN  Sell:7TU9915 5EAO12JV/ DC SIEMENS  Sell:SIEMENS / REYROLLE 7XG22 – 2RMLG  Sell:Disturbance recorder TPE 2000 ALSTOM  Sell:ABB SPAA 321C  Sell:2RMLG 02 Test Blocks RAYROLLE/ SIEMENS  Sell:SERVO MOTOR 1FK7042 5AF71 1UG0 SIEMENS  Sell:UNDER/ OVER VOLTAGE RELAY MVTU 11  Sell:SIPROTEC 4 6MD63 Bay Control Unit SIEMENS  Sell:Instantaneous Overcurrent Relays MCTI 19, 39, 40 ALSTOM  Sell:GAS Sf6 ( Sulfur Hexafluoride )  Sell:Modul communications link BM 9100 AREVA  Sell:MES 114 SEPAM  Sell:SIEMENS 3UF7010 1AU00 0 BASIC UNIT 2 SIMOCODE PROFIBUS  Sell:MVAJ 105 Tripping and Control Relays PROTECTION ALSTOM  Sell:MVAJ 21  Tripping and Control Relays PROTECTION ALSTOM  Sell:Cable fault locator model 3300  Sell:Relay SEPAM T20, S20, M20, B20  Sell:MVAP 22 Voltage Selection Relay  Sell:emerson HD 4825 3 rectifier  Sell:KABEL ETERNA NYM, NYA, NYY, NYYHY, NYFGBY,  Sell:ETERNA KABEL NYM, NYA, NYY, NYYHY, NYFGBY,  Sell:LOCKOUT RELAY 7PA2250 125V DC SIEMENS  Sell:TCS 7PA3030 SIEMENS 110 125V DC  Sell:SIEMENS CURRENT TRANSDUCER 7KG6111 2AJ10  Sell:LEGRAND remote control dimmers 040083  Sell:Relay Siemen siprotec Generator protection ( 7UM6215 5EB22 0FA0/ DD)  Sell:SIEMENS SIPROTEC 7RW600 Numerical Voltage, Frequency and Overexcitation Protection  Sell:SIPROTEC 4 7UM62 Multifunction generator, motor and transformer protection relay  Sell:LARSEN & TOUBRO Advanced Feedervision ( AFV2) :  Sell:DOWIN YD30KO85EH DIN rail mounted DC surge protection  Sell:SPD048 30 MH spd for power supplay   48VDC  Sell:LTMR100MBD Motor Management System  Sell:APOLLO SOLAR TSW 4048  Sell:BASLER DECS 200  Sell:ACE 969  Sell:SPAJ 160C  Sell:ATS 23 U70N TELEMECANIQUE  Sell:ZQV 16/ 2 Weidmü ller  Sell:ATLAS COPCO MASTER CONTROL MODULE  Sell:TYCO WPCZ M06079  Sell:ATLASCOPO ELECTRONIKON MASTER CONTROL MODULR  Sell:SIEMENS POWER METER SIMEAS 1P 7KG7500 0AA0/ CC  Sell:SIPROTEC 6MD110 4FB91 0AA0/ BB  Sell:7LF5 301 1 TIMER  Sell:siemens 3th2022 0BF4  Sell:WEIDMULLER   8019910000   RSSD 37 B UNC 4.40 LP2N  Sell:siemens 3RA1921 1AA00  Sell:3AY1711 2F 230VOLLT AC/ DC S2SIEMENS MOTOR CIRCUIT BREAKER  Sell:7SJ6421 4EB91 1HG0 / EE Multifunction Protection Relay with Synchronization  Sell:KWH LANDIS+ GYR ZMD  Sell:LANDIS & STAEFA MVE 21.15  Sell:SIEMENS SIMACODE PRO C 3UF7000 1AU00 0  Sell:WOODWARD EASYGEN 320  Sell:SEL 387 Current Differential and Overcurrent Relay  Sell:Power Meter SIMEAS P  Sell:BUSSMANN FUSE 24ABGNA 3.15  Sell:7XV5662 0AC00/ DD comunication unit  Sell:TEC 2348Latching relay   3 CO contacts   10 A.  Sell:MFVU21 Frequency Relay ALSTOM  Sell:SEPAM S42  Sell:SEPAM T 42 RELAY  Sell:Phoenix Contact URTK/ S BEN 10  Sell:DISCT CONECTING SWITCH 20 Kv   150 Kv  Sell:FAULT RELAY & MONITOR DELAB  Sell:EARTH FAULT MONITORING AND RELAY  " BENDER " A ISOMETER IR 1570  Sell:BASLER Over current BE1 700C BASLER  Sell:Underground Pipe Cable Locators  Sell:TELEMECANIQUE ABL 6RT2420 Power supplies and transformers  Sell:3M RESIN 3M  Sell:AREVA fuse 3, 3 Kv   36 Kv  Sell:VIGI C 32 Merlin Gerin / Schneider  Sell:SHAUMUT AMP TRAP A13Z500  Sell:PHOENIX CONTACT FBS 10 6  Sell:PHOENIX CONTACT Partition plate   ATP UT   3047167  Sell:Ampere & KiloAmpere SACI, Spain  Sell:MICOM P921, 922 VOLTAGE AND FREQUENCY RELAYS  Sell:REYROLLE ARGUS 8 7SG1183 4UE21 0DA Z S06  Sell:Voltage and Frequency Protection – ARGUS 8 – 7SG11  Sell:Frequency and voltage Protection – ARGUS 8 – 7SG11  Sell:FLUOROWARE MODEL 203 1414 215  Sell:MELSEC A38B MITSUBISHI  Sell:MELSEC AY13E MITSUBISHI  Sell:MELSEC AX41 MITSUBISHI  Sell:MELSEC AY22 MITSUBISHI  Sell:VALCOR SCIENTIFIC MODEL NO51P197N26 8D 921  Sell:ALFA LAVAL EPC 400 CONTROL MODULE 31830 5010 4  Sell:SOULE SURGE ARESTER PU 40  Sell:MOTOR PROTECTION AND OFERCURRENT RELAY 7SJ6005  Sell:TRANSFORMER DIFERENTIAL RELAY SEPAM 2000 MERLIN GERIN  Sell:SEPAM 2000 S35 XR* * * X2* TBN  Sell:Polymer Surge Arrester BOSUNG POWERTEC  Sell:MTL SAURGE PROTECTION DEVICE  Sell:daiichi ac voltage sensor sv hl 63  Sell:raychem LVIT 75/ 25  Sell:Voltage Selection Relay MVAP 22  Sell:OBO BATTERMANN ISOLAB INSULATING AND ARRESTER TESTER  Sell:RECLOUSER 20KV SF6 GAS AUTOMATIC SECSIONALIZER SWITCH DONGYANG  Sell:KCEG 14201N51EEE GEC ALSTOM  Sell:ENERDIS RECDIGIT 1600  Sell:ACE 3000 Type 260 Three Phase Static Electricty Meter  Sell:ALAT PENGISIAN GAS SF6 ( SF6 GAS CARTS)  Sell:Motor protection relay SEPAM 1000+ M series  Sell:GENERATOR DIFFERENTIAL RELAY SEPAM 1000+ TYPE G 88 MERLIN GERIN  Sell:kwh ACTARIS SL 7000, ACE 100, ANALOG 3 Phase & ANALOG 1 phase  Sell:stainless steel cable tie PANDUIT  Sell:Voltage and Frequency protection SIEMENS 7 RW 6000 2EA00 0DA/ BB  Sell:SIEMENS 7 RW 6000 2EA00 0DA/ BB Voltage and Frequency protection  Sell:Nari Overcurrent Protection relay  Sell:BUSBARS PROTECTION RELAY SEPAM B21  Sell:SEPAM B22 RELAY  Sell:Current/ Voltage Measuring Module ( Push through Converter) 3UF7111 1AA00 0 SIEMENS  Sell:BASLER ICRM 15 INRUSH CURRENT REDUCTION MODULE  Sell:VOLTAGE TRANDUCER 7KG6106 2EK17 0B SIMEAS SIEMENS  Sell:6GK5 204 2BB10 2AA3 SIEMENS  Sell:INTELITE AMF 20  Sell:MWh meter 10mw SCHLUMBERGER  Sell:MW DEMAND MWH 3P 4WIRE GEC METERS type: E73F3C DH  Sell:MICOM P127  Sell:MGS 3710 GENERATOR CONTROL PANEL  Sell:GE ADVANCED LINE PROTECTION SYSTEM  Sell:Auxiliary switch S2C H 6R ABB  Sell:Distance relay SEL 321 1 Phase and Ground  Sell:Cable/ Fault Locator 3M DYNATEL2273  Sell:GROUNDING STICK RIZT 22KV  Sell:STICK DETECTOR 3 34, 5 KV HASEGAWA ELECTRIC  Sell:KABLE ( KABEL) XLPE 6 KV, 11, KV, 17, KV, 20, KV, 24, KV, 30, KV, 36KV.  Sell:Sf6 GAS ( Sulfur Hexafluoride )  Sell:SF6 GAS Sulfur Hexafluoride  Sell:Generator Automatic Synchronisation  Sell:Auto Transfer Switch ( ATS)  Sell:ZIEHL Temperature monitoring MSF 220K T 221715  Sell:KABLE ( KABEL) NYY, NYFGBY, NYCY, NYYHY, YNMHY, YMGBY ETC  Sell:TRANFORMER 80 MVA 150 KV / 20 KV POUWELS  Sell:KWH HEXING HXT 34 3PHASE 4 WIRE  Sell:PANEL CAPACITOR BANK 600 kavar  Sell:LIFASA CAPACITOR BANK  Sell:WERNER STEP LADDERS  Sell:METROSIL 600A/ S7/ P/ 6331, 600A/ S3/ I, 600A/ S1/ 1008  Sell:Werner D7100 Fiberglass Extension Ladder   375 lbs. Capacity  Sell:ETL TESTING LABORATORIES INC / YASKAWA CIMR H2.2G2 E10 DRIVE  Sell:SSD series 570 motor drive  Sell:Scotch 3M 4950  Sell:ANEMOMETER KANOMAX ANEMOMASTER 6112  Sell:SIEMENS PTS 4 Portable test set  Sell:FLEXIBLE COPPER  Sell:OMRON NT20M DN121 V2 & NT600M LB121  Sell:TEST RELAY / Overcurrent Test Set  Sell:TRIMBLE VX SPATIAL STATION  Sell:TERMINATION HV  outdoor cable termination 72KV   400KV  Sell:YASKAWA CIMR H15G2 E10  Sell:SEPAM 1000+ Relay Overcurrent and undercurrent protection relay  Sell:Matsushita Electric Timer National PMH 30M DC24V AT4139  Sell:MVTC 01 RELAY D1AA0751C  Sell:ABB SOFTSTARTER PS S 44/ 76 500L  Sell:7PU4020 SIEMENS TIME RELAY  Sell:DISTANCE RELAY SIEMENS 7 SA 5221 4AB92 4QN4/ EE FULL SCHEMA DISTACE PROTECTION  Sell:OBO BATTERMANN PEAK CURRET SENSOR   PCS  Sell:Buchholz Relay COMEM type NF 80  Sell:INVERTER OMRON, ABB, HITACHI,  Sell:KV Meter, Ampere meter .  Sell:RELAY MICOM P122, P124, P127  " AREVA "  Sell:KBCH 120 01P15PEL ALSTOM& AREVA  Sell:OVERCURRENT RELAYS MCGG, 22, 52, 62, 82  " ALSTOM "  Sell:SUPERVISION RELAY MVAX 21  " ALSTOM "  Sell:OVERCURRENT AND EARTH FAULT PROTECTION RELAYSPAJ 140C  Sell:Terminal blocks ENTRELEC  Sell:Weidmuller MSV 1 KOMPL GR 1667890000  Sell:MBCI 01 ALstom Differential Feeder and Transformer Feeder Protection  Sell:DST 4600A GENERATOR CONTROL  Sell:Test switches RTXP ABB  Sell:ENERDIS MEASURING TRANSDUCERS  Sell:AGILENT HP 37907A  Sell:POWER METER PM 710, PM 800, PM 820  Sell:FLEXIBLE COPPER BAR  Sell:GE multilin 750 feeder management relay  Sell:TELEMECANIQUE ABL 6TD100G Power supplies and transformers  Sell:POWER FACTOR REGULATOR , ABB, SCHNAIDER, SIEMENS,  Sell:OBO BATTERMANN Surge protection systems  Sell:RXMVB 4 RELAY ABB  Sell:MECO AC VOLTAGE TRANSDUCER VMT  Sell:starco Ground Fault Monitor SE 701  Sell:TRANDUCER SCHLEICHER TYP SSP43 119  Sell:capacitors ABB Type CLMD63, 400V 50hz 50KVAR  Sell:CAPACITOR ABB CLMD 63 400V 3  Products Catalog:Lightning Arrester POLIMER 20 KV 10 KA  Sell:TEST BREAKER 12KV. ABB ( VD4& Vmax )  Sell:Siemens 7 VH 6001 0EA20 0AA0/ CC  Sell:magrini galileo voltage tranformer 200000 V3 / 100V3  Sell:RTF 300 F merlingerin voltage transformer  Sell:H& B TZA 401 EX ( Hartmann & Braun AG) P18021 0 2212009  Sell:DRY TRANSFORMER ( TRAFO KERING)  Sell:UNIDO AREVA TRANSFORMER  Sell:SM 6 kubicle 24 36 KV  " Schneider Electric "  Sell:TERMINATING AND JOINTING 1Kv   33Kv Raychem, 3M, UEROMOLD  Sell:3M™ Aluminum Foil Tape 425  Sell:3M SCOTCH FILL TAPE PUTTY 1 1/ 2 " X 60' ROLL ( SINGLE OR 50/ CASE)  Sell:SCOTH 33+ 3M  Sell:earth fault relay ABB SPAS 120C  Sell:Jaeger Regulation type KAE  Sell:PROTOCOL CONVERTER RELAY KITZ Relay AREVA  Sell:Auto Circuit Recloser  Sell:RTK ANNUNCIATOR SERIES725  Sell:ARDETEM PECA 301  Sell:DIFFERENTIAL RELAY TRANSFORMER AND GENERATOR, OVER CURRENT SEPAM 1000+ series 80 MERLIN GERIN  Sell:ARTECHE RJ4XR4  Sell:ARTECHE RF4DI 110 V CC  Sell:JOINTING 20 KV DENSON  Sell:DANOTHERM F2 Aluminium Housed Wirewound Power Resistor  Sell:DENSON TERMINATION KIT AND JOINTING KIT  Sell:COAXIAL RG 9 Ericsson TZC500  Sell:panduit cable ties  Sell:RELAY SEPAM 1000+  Sell:DISTANCE PROTECTION RELAY LFZR 111 / LFAA 101  " ALSTHOM "  Sell:Lenze E82EV371K2B Freq Inverter 1/ 2Hp  Sell:Allen Bradley 150  B135NBDB  Sell:SUNSET MTT  Sell:FANOX Motor protection relay F20  Sell:SIEMENS Overcurrent Protection 7SJ80  Sell:BASLER BE1 851 OVERCURRENT PROTECTION SYSTEM  Sell:MEM HRC FUSE LINK BS8. 30 SB3. 30AMP 415VAC  Sell:CATERPILLAR EMCP II ELECTRONIC MODULAR CONTROL PANEL  Sell:TAP CHANGER  Sell:Compact Switchgear 12 & 24 kV AREVA  Sell:EATON APR 48 Rectifire  Sell:CHINT ACB, MCCB, MCB  Sell:BASLER Protection and Control Relay Devices  Sell:KRK UNDER AND OVER VOLTTAGE RELAY  Sell:RAYCHEM BBIT ( HEATSHRINK)  Sell:EARTH FAULT RELAY MCAG  " AREVA " /  " ALSTOM "  Sell:FUSES GE POWER CONTROL TIS 63M80 63A  Sell:DORMAN SMITH FUSE Cat NO EDC 315 A  Sell:SIEMENS FUSES MEDIUM FOLTAGE 3, 3   33 KV  Sell:SIBA FUSE MEDIUM FOLTAGE 3, 3   33 KV  Sell:ETI FUSES ( MEDIUM VOLTAGE FUSES)  Sell:GE STATIC BREAKER AUXILIARY RELAY 12 SBA  Sell:Teletech TX125 is an essential and practical tool for all telecommunications technicians  Sell:LT6 P0M025FM Telemecanique ( Schnaider)  Sell:Multi Fiber Cable 4SC  4SC ERICSSON  Sell:DENSON TERMINATION, CABLE ACCECORIES  Sell:ueromold cable joint  Sell:KVGC 202 Voltage Regulating Control Relay  Sell:MICOM P 141 Feeder Management Relays  Sell:MICOM P 342, 343 GENERATOR PROTECTION RELAYS  Sell:AUTO RECLOSER RELAY MVTR 51 RELAY  " ALSTOM "  Sell:SEG RELAY MR13 IRSR and SEG RELAY MR13 IE  Sell:TOSHIBA OVER CURRENT ADN PROTECTION RELAY  Sell:ITRON ACE 9000 Taurus IBS  Sell:ITRON / ACTARIS Kwh Meter Sl7000, ACE 1000, ACE 9000  Sell:KWH prabayar electronic ITRON/ ACTARIS ACE 9000  Sell:MEGGER OIL TEST SET OTS 60 PB and OTS80PB 60 kV and 80 kV  Sell:MEGGER TEST RELAY SVERKER 750 and SVERKER780  Sell:2RMLG 01 Test Blocks SIEMENS  Sell:lockout relay SIEMENS 7 PA  Sell:DIASYS NETMATION FXSVL02B MITSUBISHI  Sell:DIASYS NETMATION FXAOM01A MITSUBISHI  Sell:DIASYS NETMATION FXEOS01 MITSUBISHI  Sell:DIASYS NETMATION FXAOM01BD MITSUBISHI  Sell:FUSE 20 KV, 24Kv, 36Kv, 16Kv, 11Kv, 6Kv and Low Voltge NH FUSE., BUSSMANN, SIBA, ABB, SIEMEN, MERLIN GERIN, ETI, AREVA  Sell:BARDIN FLAIR 213 MERLIN GERIN  Sell:Schnaider SM 6 Medium voltage switchgear  Sell:PGC FLUOKIT M + KUBICLE AREVA ( UNINDO)  Sell:FLUOKIT M + KUBICLE AREVA ( UNINDO)  Sell:AREVA SWITCH GEAR MEDIUM & HIGH VOLTAGE  Sell:PANEL CUBICAL / SWITCH GEAR MEDIUM & HIGH VOLTAGE  Sell:RMS 1A54 Alarm Panel  Sell:SIEMENS 3SJ1O30   1AV  Sell:SURGE PROTECTION ABB, TYPE OVR SO 3N 15 255E, IN 15KA , 255 V, 1, 7 KV  Sell:7TR9803 3DAO/ BA SIEMENS  Sell:7TR 9300  3EA03/ CB SIEMENS  Sell:7TR2910 3CAO/ B 110/ 125 SIEMENS  Sell:7TR9802 3AA03/ CE110/ DC SIEMENS  Sell:differential relay SEPAM 1000+ type 80  Sell:Thyristor Power Rack 11 33KV  Sell:COPPER BUSBAR  Sell:Aluminium Busbar  Sell:POWERLOGIC CMDLC DISPLAY MONITOR  Sell:Cast Resin Transformers  Sell:7SJ6225 4EAB90 3FE0/ FF MULTI FUN SIEMENS  Sell:Cutout Fuse Polimer 20 24kv  Sell:SIPROTEC 7SJ6421 4EB91 1FE0/ EE SIEMENS  Sell:Notifier AFP 300 CPU Replacement Board  Sell:SPAD 346 C Stabilized Differential Relay  " ABB "  Sell:Surge Counter arester  Sell:RELAY BUCHHOLZ . type BF 80/ Q K 250V, 2A IP 54  Sell:VOLTAGE TRANSFORMER 20Kv   150Kv  Sell:OVER VOLTAGE RELAY SPAU 110C & SPAU 140C " ABB "  Sell:SADTEM CURRENT TRANSFORMER  Sell:Vamp Protectin and over current Relay  Sell:AUTO RECLOSE RELAYL FAA 101  " AREVA "  Sell:HANG INSULATOR SEDIVER 120KN  Sell:INSULATOR 120 KN SEDIVER  Sell:ABB OVER CURRENT RELAY REJ 521 and REJ 525  Sell:fire extingguisher amercan lafrance 2, 27 kg  Sell:generator protection relay SR 489 GE MULTILIN  Sell:TRANDUCER CHAUFIN ARNOUX CDM 3 WATTMETRE T4 FNE  Sell:SIEMENS RELAY 7SJ 6 XX  Sell:SADTEM OUDDOR CURRENT TRANSFORMER SADTEM K51  Sell:KOYO KOSTAC G 15 T  Sell:isa test relay  Sell:OUDDOR VOLTAGE TRANSFORMER MEDIUM AND HIGH VOLTAGE ESITAS  Sell:7VHB000 4AA04/ FC SIEMENS  Sell:CEE RELAY ITG 7285  Sell:DIASYS NETMATION FXDOM01 MITSUBISHI  Sell:DIASYS NETMATION FXGTI01 MITSUBISHI  Sell:DIASYS NETMATION FXAIM05M MITSUBISHI  Sell:DIASYS NETMATION FXDOM01D MITSUBISHI  Sell:DIASYS NETMATION FXAIM05A MITSUBISHI  Sell:SIEMENS B85321 A B2, 2x4µ  Sell:Siemens Simatic Net Profibus OLM/ G12 6GK1502 3CB10  Sell:TRANDUCER HC6610  Sell:POWER FACTOR CONTROLER NV  14S DELAB  Sell:SIEMENS RWX62.7032  Sell:POWER LINE FILTER EPCOS B 84131M 3A116  Sell:CROMPTON PROTECTORE MODEL 253 PVEW  Sell:CROMPTON PALADIN TRANDUCER 253  TVLW  Sell:HITACHI EB 20 HRP PROGRAMMABLE CONTROLER  Sell:OpenAir actuator SIEMENS GDE131.1P GDE1311P MF 1233 MF  Sell:Scoth 23 3M  Sell:ABB RTXP 8 COMBI TEST ( TEST SISTEM)  Sell:Power Quality & Disturbance Analysers CHK PM 30  Sell:KOKONOE FUSE NRK 400.250V 300A  Sell:DELAB POWER FACTOR REGULATOR  Sell:MINIMAX D 23840  Sell:MODN C07 OOFAA1115 GEC ALSTOM  Sell:CM MSS / 1SVR430811R1300 ABB  Sell:GOVERNOR CONTROLER GHANA CONTROL  Sell:STARTING REACTOR 3, 3 Kv, 160 kw, 3P 50HZ  Sell:AVR STAMFORD AVK  Sell:MATSUYAMA STABILIZER  Sell:Oscilloscopes Tektronix 2235 A  Sell:HUAWEI FA9 83A Semi conductor Arrester Protective Unit  Sell:isa test relay and secondery  Sell:CITEL DS150VG 300  Sell:SHIZUKI CAPACITOR ( OIL ADN DRAY TYPE)  Sell:PYREX insulator  Sell:ESITAS CURRENT TRANSFORMER  Sell:UNINDO TRANSFORMER  Sell: " SOCOMEC " LBS, COS, POWER METER,  Sell:BUCHHOLZ RELAY . type BF 80 250V, 2A IP 54  " EMB "  Sell:oli tranformer 
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SEG RELAY MR13-IRSR and SEG RELAY MR13-IE
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OriginGermany
MRI3 - Digital multifunctional relay for overcurrent protection
2 TD_MRI3_11.07_GB
Contents
1 Introduction and application
2 Features and characteristics
3 Design
3.1 Connections
3.1.1 Analog input circuits
3.1.2 Output relays
3.1.3 Blocking input
3.1.4 External reset input
3.2 Relay output contacts
3.2.1 Fault recorder
3.2.2 Parameter settings ( see chapter 5)
3.3 LEDs
4 Working principle
4.1 Analog circuits
4.2 Digital circuits
4.3 Directional feature
4.3.1 Reversal in direction during the activation
phase
4.4 Earth fault protection
4.4.1 Generator stator earth fault protection
4.4.2 System earth fault protection
4.5 Earth-fault directional feature
( ER/ XR-relay type)
4.6 Determining earth short-circuit fault
direction
4.6.1 Directly ï ¿ ½ earthed system
4.6.2 Resistance ï ¿ ½ earthed system
4.6.3 Connection possibilities of the voltage
transformers for SR relay types
4.7 Demand imposed on the main curren
transformers
5 Operation and settings
5.1 Display
5.2 Setting procedure
5.3 System parameter
5.3.1 Display of measuring values as primary
quantities ( Iprim phase)
5.3.2 Display of earth current as primary quantity
( Iprim earth)
5.3.3 Display of residual voltage UE as primary
quantity ( Uprim/ Usec)
5.3.4 Voltage transformer connection for residual
voltage measuring ( 3pha/ e-n/ 1: 1)
5.3.5 Nominal frequency
5.3.6 Display of the activation storage
( FLSH/ NOFL)
5.3.7 Parameter switch/ external triggering of the
fault recorder
5.4 Parameter protection
5.4.1 Pickup current for phase overcurrent
element ( I> )
5.4.2 Time current characteristics for phase
overcurrent element ( CHAR I> )
5.4.3 Trip delay or time factor for phase
overcurrent element ( tI> )
5.4.4 Reset setting for all tripping characteristics
in the phase current path
5.4.5 Current setting for high set element ( I> > )
5.4.6 Trip delay for high set element ( tI> > )
5.4.7 Relay characteristic angle RCA
5.4.8 Pickup value for residual voltage UE
( ER/ XR-relay type)
5.4.9 Pickup current for earth fault element ( IE> )
5.4.10 WARN/ TRIP changeover
( E/ X and ER/ XR-relay type)
5.4.11 Time current characteristics for earth fault
element ( CHAR IE) ( not for ER/ XR-relay
type)
5.4.12 Trip delay or time multiplier for earth fault
element ( tIE> > )
5.4.13 Reset mode for inverse time tripping in
earth current path
5.4.14 Current setting for high set element of
earth fault supervision ( IE> > )
5.4.15 Trip delay for high set element of earth
fault supervision ( tIE> > )
5.4.16 COS/ SIN Measurement
( ER/ XR-relay type)
5.4.17 SOLI/ RESI changeover ( SR-relay type)
5.4.18 Block/ Trip ï ¿ ½ time
5.4.19 Circuit breaker failure protection tCBFP
5.4.20 Adjustment of the slave address
5.4.21 Setting of Baud-rate ( applies for Modbus
Protocol only)
5.4.22 Setting of parity ( applies for Modbus
Protocol only)
5.5 Fault recorder
5.5.1 Adjustment of the fault recorder
5.5.2 Number of the fault recordings
5.5.3 Adjustment of trigger occurrences
5.5.4 Pre-trigger time ( Tpre)
5.6 Adjustment of the clock
5.7 Additional functions
5.7.1 Blocking the protection functions and
assignment of the output relays
5.8 Setting value calculation
5.8.1 Definite time overcurrent element
5.8.2 Inverse time overcurrent element
5.9 Indication of measuring and fault values
5.9.1 Indication of measuring values
5.9.2 Units of the measuring values displayed
5.9.3 Indication of fault data
5.9.4 Fault memory
5.10 Reset
5.10.1 Erasure of fault storage
TD_MRI3_11.07_GB 3
6 Relay testing and commissioning
6.1 Power-On
6.2 Testing the output relays and LEDs
6.3 Checking the set values
6.4 Secondary injection test
6.4.1 Test equipment
6.4.2 Example of test circuit for MRI3 relays
without directional feature
6.4.3 Checking the input circuits and measured
values
6.4.4 Checking the operating and resetting
values of the relay
6.4.5 Checking the relay operating time
6.4.6 Checking the high set element of the relay
6.4.7 Example of a test circuit for MRI3 relay
with directional feature
6.4.8 Test circuit earth fault directional feature
6.4.9 Checking the external blocking and reset
functions
6.4.10 Testing the external blocking with
Block/ Trip function
6.4.11 Test of the CB failure protection
6.5 Primary injection test
6.6 Maintenance
7 Technical data
7.1 Measuring input circuits
7.2 Common data
7.3 Setting ranges and steps
7.3.1 Time overcurrent protection ( I-Type)
7.3.2 Earth fault protection ( SR-Type)
7.3.3 Earth fault protection ( E/ X-Type)
7.3.4 Earth fault protection ( ER/ XR-Type)
7.3.5 Block/ Trip ï ¿ ½ time
7.3.6 Switch failure protection
7.3.7 Interface parameter
7.3.8 Parameter for the fault recorder
7.3.9 Inverse time overcurrent protection relay
7.3.10 Direction unit for phase overcurrent relay
7.3.11 Determination of earth fault direction
( MRl3-ER/ XR)
7.3.12 Determination of earth fault direction
( MRl3-SR)
7.4 Inverse time characteristics
7.5 Output contacts
8 Order form
4 TD_MRI3_11.07_GB
1 Introduction and application
The MRl3 digital multifunctional relay is a universal
time overcurrent and earth fault protection device intended
for use in medium-voltage systems, either with
an isolated/ compensated neutral point or for networks
with a solidly earthed/ resistance-earthed neutral point.
The protective functions of MRI3 which are implemented
in only one device are summarized as follows:
ï ¿ ½ Independent ( Definite) time overcurrent relay,
ï ¿ ½ inverse time overcurrent relay with selectable characteristics,
ï ¿ ½ integrated determination of fault direction for application
to doubly infeeded lines or meshed systems,
ï ¿ ½ two-element ( low and high set) earth fault protection
with definite or inverse time characteristics,
ï ¿ ½ integrated determination of earth fault direction for
application to power system networks with isolated
or arc suppressing coil ( Peterson coil) neutral
earthing. ( ER/ XR-relay type) ,
ï ¿ ½ integrated determination of earth short-circuit fault direction
in systems with solidly-earthed neutral point or
in resistance-earthed systems ( SR-relay type) .
Furthermore, the relay MRI3 can be employed as a
back-up protection for distance and differential protective
relays.
A similar, but simplified version of overcurrent relay
IRI1 with reduced functions without display and serial
interface is also available.
Important:
For additional common data of all MR-relays please
refer to manual " MR - Digital Multifunctional relays " .
On page 51 of this manual you can find the valid
software versions.
2 Features and characteristics
ï ¿ ½ Digital filtering of the measured values by using discrete
Fourier analysis to suppress the high frequence
harmonics and DC components induced by faults or
system operations,
ï ¿ ½ two parameter sets,
ï ¿ ½ selectable protective functions between:
definite time overcurrent relay and
inverse time overcurrent relay,
ï ¿ ½ selectable inverse time characteristics according to
IEC 255-4:
Normal Inverse ( Type A)
Very Inverse ( Type B)
Extremely Inverse ( Type C)
Special characteristics,
ï ¿ ½ reset setting for inverse time characteristics selectable,
ï ¿ ½ high set overcurrent unit with instantaneous or definite
time function,
ï ¿ ½ two-element ( low and high set) overcurrent relay both
for phase and earth faults,
ï ¿ ½ directional feature for application to the doubly infeeded
lines or meshed systems,
ï ¿ ½ earth fault directional feature selectable for either isolated
or compensated networks,
ï ¿ ½ sensitive earth fault current measuring with or without
directional feature ( X and XR-relay type) ,
ï ¿ ½ determination of earth short-circuit fault direction for
systems with solidly-earthed or resistance-earthed
neutral point,
ï ¿ ½ numerical display of setting values, actual measured
values and their active, reactive components, memorized
fault data, etc.,
ï ¿ ½ display of measuring values as primary quantities,
ï ¿ ½ withdrawable modules with automatic short circuiters
of C.T. inputs when modules are withdrawn,
ï ¿ ½ blocking e.g. of high set element ( e.g. for selective
fault detection through minor overcurrent protection
units after unsuccessful AR) ,
ï ¿ ½ relay characteristic angle for phase current directional
feature selectable,
ï ¿ ½ circuit breaker failure protection,
ï ¿ ½ storage of trip values and switching-off time ( tCBFP) of
5 fault occurences ( fail-safe of voltage) ,
ï ¿ ½ recording of up to eight fault occurences with time
stamp,
ï ¿ ½ free assignment of output relays
ï ¿ ½ serial data exchange via RS485 interface possible;
alternatively with SEG RS485 Pro-Open Data Protocol
or Modbus Protocol,
ï ¿ ½ suppression of indication after an activation
( LED flash) ,
ï ¿ ½ display of date and time
TD_MRI3_11.07_GB 5
3 Design
3.1 Connections
Phase and earth current measuring:
Figure 3.1: Measuring of the phase currents for over-current- and
short-circuit protection ( I> , I> > )
Figure 3.2: Earth-fault measuring by means of ring-core C.T. ( IE)
When phase-- and earth-fault current measuring are
combined, the connection has to be realized as per
Figure 3.1and Figure 3.2 or Figure 3.3.
Figure 3.3: Phase current measuring and earth-current detection
by means of Holmgreen-circuit.
This connection can be used with three existing phase
current transformers when combined phase and earthcurrent
measuring is required.
Disadvantage of holmgreen-circuit:
At saturation of one or more C.Ts the relay detects
seeming an earth current.
* This arrow shows the current flow in forward direction, for this LED ï ¿ ½ ï ¿ ½ lights up green
6 TD_MRI3_11.07_GB
Voltage measuring for the directional detection:
Figure 3.4: Measuring of the phase voltages for the directional
detection at overcurrent, short-circuit or earth-fault
protection ( I> , I> > , IE> and IE> > ) .
For details on the connection of ER/ XR-unit type c.t.s,
see para 4.5.
I>
I>
I>
A3 L1
U1
U2
A5 L2
A7 L3
A2 N
U3
L1
L2
L3
a
b
c
Figure 3.5: Voltage transformer in V-connection for the
directional detection at overcurrent and short-circuit
protection.
The V-connection can not be applied at earth fault directional
feature.
3.1.1 Analog input circuits
The protection unit receives the analog input signals of
the phase currents IL1 ( B3-B4) , IL2 ( B5-B6) , IL3 B7-B8)
and the current IE ( B1-B2) , phase voltages U1 ( A3) ,
U2 ( A5) , U3 ( A7) with A2 as star point, each via
separate input transformers.
The constantly detected current measuring values are
galvanically decoupled, filtered and finally fed to the
analog/ digital converter.
For the unit type with earthfault directional features
( ER/ XR-relay type) the residual voltage UE in the secondary
circuit of the voltage transformers is internally
formed.
In case no directional feature for the phase current
path is necessary the residual voltage from the open
delta winding can directly be connected to A3 and
A2.
See Chapter 4.5 for voltage transformer connections
on isolated/ compensated systems.
3.1.2 Output relays
The MRI3 is equipped with 5 output relays. Apart from
the relay for self-supervision, all protective functions
can be optionally assigned:
ï ¿ ½ Relay 1: C1, D1, E1 and C2, D2, E2
ï ¿ ½ Relay 2: C3, D3, E3 and C4, D4, E4
ï ¿ ½ Relay 3: C5, D5, E5
ï ¿ ½ Relay 4: C6, D6, E6
ï ¿ ½ Relay 5: Self-supervision C7, D7, E7
All trip and alarm relays are working current relays,
the relay for self supervision is an idle current relay.
3.1.3 Blocking input
The blocking functions adjusted before will be blocked
if an auxiliary voltage is connected to ( terminals)
D8/ E8. ( See chapter 5.7.1)
3.1.4 External reset input
Please refer to chapter 5.10.
TD_MRI3_11.07_GB 7
3.2 Relay output contacts
Figure 3.6
3.2.1 Fault recorder
The MRI3 is equipped with a disturbance value recorder
which records the measured analogue values
as momentary values. The momentary values
iL1, iL2, iL3, iE,
are scanned within a grid 1.25 ms ( with 50 Hz) or
1.041 ms ( with 60 Hz) and filed in a circulating storage.
The max. storage capacity amounts to 16 s ( with
50 Hz) or 13.33 s ( with 60 Hz) .
Storage division
Independent of the recording time, the entire storage
capacity can be divided into several cases of disturbance
with a shorter recording time each. In addition,
the deletion behaviour of the fault recorder can be influenced.
No writing over
If 2, 4 or 8 recordings are chosen, the complete
memory is divided into the relevant number of partial
segments. If this max. number of fault event has been
exceeded, the fault recorder block any further recordings
in order to prevent that the stored data are
written over. After the data have been read and deleted,
the recorder to ready again for further action.
Writing over
If 1, 3 or 7 recordings are chosen, the relevant number
of partial segments is reserved in the complete
memory. If the memory is full, a new recording will
always write over the oldest one.
The memory part of the fault recorder is designed as
circulating storage. In this example 7 fault records can
be stored ( written over) .
Memory space 6 to 4 is occupied.
Memory space 5 is currently being written in
Figure 3.7: Division of the memory into 8 segments, for example
Since memory spaces 6, 7 and 8 are occupied, this
example shows that the memory has been assigned
more than eight recordings. This means that No. 6 is
the oldest fault recording and No. 4 the most recent
one.
8 TD_MRI3_11.07_GB
trigger occurence
recording duration
Tpre
[ s]
Figure 3.8: Recording scheme of the fault recorder with
pre-trigger time
Each memory segment has a specified storage time
which permits setting of a time prior to the trigger
event.
Via the interface RS485 the data can be read and
processed by means of a PC with HTL/ PL-Soft4. The
data is graphically edited and displayed. Binary
tracks are recorded as well, e.g. activation and trip.
TD_MRI3_11.07_GB 9
3.2.2 Parameter settings ( see chapter 5)
System parameter
Relay type MRI3- I IE
IX
IRE
IRX
IR IER
IXR
IRER
IRXR
ER
XR
E
X
ISR IRSR SR
Display of measuring values as primary
quantities ( Iprim phase)
X X X X X X X X
Display of earth current as primary
quantities ( Iprim earth)
X X X X X X X X X
Display of residual voltage UE as primary
quantity ( Uprim/ Usec)
X X X
3pha/ e-n/ 1: 1 X X X
50/ 60 Hz X X X X X X X X X X X
LED-Flash X X X X X X X X X X X
RS 485/ Slaveaddress X X X X X X X X X X X
Baud-Rate 1) X X X X X X X X X X X
Parity-Check 1) X X X X X X X X X X X
Adjustment of the clock:
Y = year; M = month; D = day;
h = hour; m = minute; s = sec.
X X X X X X X X X X X
Table 3.1: System parameters of the different relay types
Protection parameter
Relay type MRI3- I IE
IX
IRE
IRX
IR IER
IXR
IRER
IRXR
ER
XR
E
X
ISR IRSR SR
2 parameter sets X X X X X X X X X X X
I> X X X X X X X X
CHAR I> X X X X X X X X
tI> X X X X X X X X
0 s/ 60 s 2) X X X X X X X X
I> > X X X X X X X X
tI> > X X X X X X X X
RCA X X X X
UE X X X
IE> X X X X X X X X X
warn/ trip X X X X X X
CHAR IE X X X X X X
tIE X X X X X X X X X
0s / 60 s 3) X X X X X X
IE> > X X X X X X X X X
tIE> > X X X X X X X X X
sin/ cos X X X
soli/ resi X X X
tCBFP X X X X X X X X X X X
Block/ Trip X X X X X X X X X X X
Table 3.2: Protection parameters of the different relay types.
1) Only devices with Modbus-Protocol
2) Reset setting for inverse time characteristics in phase current path
3) Reset setting for inverse time characteristics in earth current path
10 TD_MRI3_11.07_GB
Parameter for the fault recorder
Relay type MRI3- I IE
IX
IRE
IRX
IR IER
IXR
IRER
IRXR
ER
XR
E
X
ISR IRSR SR
Number of fault events X X X X X X X X X X X
Trigger events X X X X X X X X X X X
Pre-trigger time ( Tpre) X X X X X X X X X X X
Table 3.3: Parameters for the fault recorder of the different relay types
Additional parameters
Relay-type MRI3- I IE
IX
IRE
IRX
IR IER
IXR
IRER
IRXR
ER
XR
E
X
ISR IRSR SR
Blocking mode 1) X X X X X X X X X X X
Relay parameterizing X X X X X X X X X X X
Fault recorder X X X X X X X X
Table 3.4: Additional parameters of the different relay types
1) For 2 parameter sets ( separately for each parameter set)
TD_MRI3_11.07_GB 11
Figure 3.9: Front plate MRI3-I
Figure 3.10: Front plate MRI3-E/ X
Figure 3.11: Front plate MRI3-IR
Figure 3.12: Front plate MRI3-ER/ XR
12 TD_MRI3_11.07_GB
Figure 3.13: Front plate MRI3-SR
Figure 3.14: Front plate MRI3-IRER/ IRXR and MRI3-IER/ IXR
3.3 LEDs
The LEDs left from the display are partially bi-coloured,
the green indicating measuring, and the red fault indication.
MRI3 with directional feature have a LED ( green- and
red arrow) for the directional display. At pickup/ trip
and parameter setting the green LED lights up to indicate
the forward direction, the red LED indicates the
backward direction.
The LED marked with letters RS lights up during setting
of the slave address of the device for serial data communication.
The LEDs arranged at the characteristic points on the
setting curves support the comfortable setting menu selection.
In accordance with the display 5 LEDs for
phase fault overcurrent relay and 5 LEDs for earth-fault
relay indicate the corresponding menu point selected.
The LED labelled with the letters LR is alight while the
fault recorder is being adjusted.
Figure 3.15: Front plate MRI3-IRSR; MRI3-IRE/ IRX and MRI3-ISR
TD_MRI3_11.07_GB 13
4 Working principle
4.1 Analog circuits
The incoming currents from the main current transformers
on the protected object are converted to voltage
signals in proportion to the currents via the input transformers
and burden. The noise signals caused by inductive
and capacitive coupling are supressed by an
analog R-C filter circuit.
The analog voltage signals are fed to the A/ Dconverter
of the microprocessor and transformed to
digital signals through Sample- and Hold-circuits. The
analog signals are sampled at 50 Hz ( 60 Hz) with a
sampling frequency of 800 Hz ( 960 Hz) , namely, a
sampling rate of 1.25 ms ( 1.04 ms) for every measuring
quantity. ( 16 scans per periode) .
Figure 4.1: Block diagram
4.2 Digital circuits
The essential part of the MRI3 relay is a powerful microcontroller.
All of the operations, from the analog
digital conversion to the relay trip decision, are carried
out by the microcontroller digitally. The relay program
is located in an EPROM ( Electrically-Programmable-
Read-Only-Memory) . With this program the CPU of the
microcontroller calculates the three phase currents and
ground current in order to detect a possible fault situation
in the protected object.
For the calculation of the current value an efficient digital
filter based on the Fourier Transformation ( DFFT -
Discrete Fast Fourier Transformation) is applied to suppress
high frequency harmonics and DC components
caused by fault-induced transients or other system disturbances.
The calculated actual current values are compared
with the relay settings. If a phase current exceeds the
pickup value, an alarm is given and after the set trip
delay has elapsed, the corresponding trip relay is activated.
The relay setting values for all parameters are stored in
a parameter memory ( EEPROM - Electrically Erasable
Programmable Read-only Memory) , so that the actual
relay settings cannot be lost, even if the power supply
is interrupted.
The microprocessor is supervised by a built-in " watchdog "
timer. In case of a failure the watchdog timer resets
the microprocessor and gives an alarm signal, via
the output relay " self supervision " .
4.3 Directional feature
A built-in directional element in MRI3 is available for
application to doubly infeeded lines or to ring networks.
The measuring principle for determining the direction is
based on phase angle measurement and therefore
also on coincidence time measurement between current
and voltage. Since the necessary phase voltage
for determining the direction is frequently not available
in the event of a fault, whichever line-to-line voltage follows
the faulty phase by 90ï ¿ ½ is used as the reference
voltage for the phase current. The characteristic angle
at which the greatest measuring sensitivity is achieved
can be set to precede the reference voltage in the
range from 15ï ¿ ½ to 83ï ¿ ½ .
Figure 4.2: Relay characteristic angle
The TRIP region of the directional element is determined
by rotating the phasor on the maximum sensitivity
angle for ï ¿ ½ 90ï ¿ ½ , so that a reliable direction decision
can be achieved in all faulty cases.
14 TD_MRI3_11.07_GB
4.3.1 Reversal in direction during the
activation phase
Reversal of the current direction during the activation
phase can lead to hyperfunctions. This mainly applies
to installations where parallel connected lines are
monitored by current relays with directional feature.
For this reason the directional determination for the
phase current is shown in a time window; this applies
to all SR versions. In case of activation due to a fault,
a timer is started and measures the time in the determined
direction for max. 1 s. This timer runs backwards
at half speed if, during the activation phase, a
fault causes reversal of the direction. Only when the
timer is at zero again, the MRI3 recognizes the reversal
in direction. The switch-over time is max. 2 s. The
activation delays tl> and tl> > are not affected by the
delayed recognition of direction.
1.5 1.0 0.5 0.5 1.0 1.5 [ s]
Trip delay at direction reversal
max. time
Recognition of direction reversal
Recognition of
backward direction
is alight
Recognition of
forward direction
is alight
Timer runs at
half speed
actual
direction reversal
t= 1/ 2
Figure 4.3: Recording scheme of the fault recorder with lead
time
MRI3
MRI3 MRI3
MRI3
G
IK = 0, 3 kA
IK = 3, 61 kA
IK = 0, 9 kA
IK = 3, 31 kA
IK = 1, 2 kA
l = 3 km
l = 0, 5 km
l = 3 km
No. 2 No. 4
No. 1 No. 3
Figure 4.4
Example:
Figures 4.4 and 4.5 illustrate a possible fault situation
with a reversal in direction in the fault-free line.
The current transformers used have a primary current of
250 A. The switch point for the I> stage is 0.25 kA
and for the I> > stage 1 kA. All devices have the same
setting and will, if set to ï ¿ ½ Forwardï ¿ ½ , recognize the direction
in relation to the forward direction of the line.
The critical point here is the MRI3 No. 1. Using delay
action in directional recognition, it is possible to prevent
shut-down of the fault-free line.
The following relay setting applies:
I> 1.00 x In
CHAR I> DEFT ( inverse)
trip delay
tI> ( V) 10s
Trip delay in forward
direction
tI> ( R) EXIT ( no trip) Delay in
backward direction
I> > 4.00 x In
tI> > ( V) 0.1 s
tI> > ( R) EXIT
MRI3
MRI3 MRI3
MRI3
G
IK = 1, 2 kA
IK = 2, 0 kA
IK = 1, 2 kA
IK = 0, 8 kA
l = 0, 5 km
l = 3 km
l = 3 km
No. 1 No. 3
No. 2 No. 4
Figure 4.5
TD_MRI3_11.07_GB 15
If line impedance and internal resistance of the generator
is only ohmic:
If line impedance and internal resistance of the generator
is only inductive:
The maximum sensitivity angle corresponds to the R/ L
component.
The TRIP region of the directional element is determined
by rotating the phasor on the maximum sensitivity
angle for ï ¿ ½ 90ï ¿ ½ , so that a reliable direction decision
can be achieved in all faulty cases.
Figure 4.6: TRIP/ NO-TRIP region for directional element in MRI3.
In this case the foreward direction is defined as TRIP
region and the backward direction as NO-TRIP region.
By means of accurate hardware design and by using
an efficient directional algorithm a high sensitivity for
the voltage sensing circuit and a high accuracy for
phase angle measurement are achieved so that a correct
directional decision can be made even by close
three-phase faults.
As an addition, to avoid maloperations due to disturbances,
at least 2 periods ( 40 ms at 50 Hz) are
evaluated.
For the MRI3-overcurrent relays with directional feature
different time delays or time multipliers can be set for
forward and backward faults ( ref. to chapter 5.4.3) .
If the trip delay for backward faults is set longer than
the one for forward faults, the protective relay works
as a " backup " -relay for the other lines on the same
busbar. This means that the relay can clear a fault in
the backward direction with a longer time delay in
case of refusal of the relay or the circuit breaker on the
faulted line.
If the trip delay for backward faults is set out of range
( on the display " EXIT " ) , the relay will not trip in case of
backward faults.
The assignment of the output relays can be used to select
in which direction the failure is to be indicated ( refer
also to Chapter 5.7.1) . It is possible to indicate the
activation and/ or the tripping for each tripping direction
via the output relays.
16 TD_MRI3_11.07_GB
4.4 Earth fault protection
4.4.1 Generator stator earth fault
protection
With the generator neutral point earthed earthed as
shown in Figure 4.7 the MRI3 picks up only to phase
earth faults between the generator and the location of
the current transformers supplying the relay.
Earth faults beyond the current transformers, i.e. on the
consumer or line side, will not be detected.
Figure 4.7: Generator stator earth fault protection
4.4.2 System earth fault protection
With the generator neutral point earthed as shown in
Figure 4.8, the MRI3 picks up only to earth faults in
the power system connected to the generator. It does
not pick up to earth faults on the generator terminals or
in generator stator.
Figure 4.8: System earth fault protection
TD_MRI3_11.07_GB 17
4.5 Earth-fault directional feature
( ER/ XR-relay type)
A built-in earth-fault directional element is available for
applications to power networks with isolated or with
arc suppressing coil compensated neutral point.
For earth-fault direction detection it is mainly the question
to evaluate the power flow direction in zero sequence
system. Both the residual voltage and neutral
( residual) current on the protected line are evaluated to
ensure a correct direction decision.
In isolated or compensated systems, measurement of
reactive or active power is decisive for earth-fault detection.
It is therefore necessary to set the ER/ XR-relay
type to measure according to sin ï ¿ ½ or cos ï ¿ ½ methods,
depending on the neutral-point connection method.
The residual voltage UE required for determining earth
fault direction can be measured in three different
ways, depending on the voltage transformer connections.
( refer to Table 4.1) . Total current can be measured by
connecting the unit either to a ring core C.T. or to current
transformers in a Holmgreen circuit. However,
maximum sensitivity is achieved if the MRl1 protective
device is connected to a ring core C. T. ( see Figure
3.2) .
The pick-up values IE> and IE> > ( active or reactive current
component for cos ï ¿ ½ or sin ï ¿ ½ method) for ER-relay
types can be adjusted from 0.01 to 0.45 x IN. For relay
type MRI3-XR these pick-up values can be adjusted
from 0.1 to 4.5% IN.
Adjustment
possibility
Application Voltage transformer
connections
Measurd
voltage at
earth fault
Correction factor
for residual
voltage
ï ¿ ½ 3phaï ¿ ½
3-phase voltage
transformer connected
to terminals A3, A5,
A7, A2
( MRI3-IRER;
MRI3-IER;
MRI3-ER/ XR)
 3 x UN = 3 x U1N K = 1 / 3
ï ¿ ½ e-nï ¿ ½
e-n winding
connected to
terminals A3, A2
( MRI3-IER;
MRI3-ER/ XR)
UN =  3 x U1N K = 1 /  3
ï ¿ ½ 1: 1ï ¿ ½
Neutral-point voltage
( = residual voltage)
terminals A3, A2
( MRI3-IER;
MRI3-ER/ XR)
U1N = UNE K = 1
Table 4.1: Connection of the voltage transformers
18 TD_MRI3_11.07_GB
Figure 4.9: Phase position between the residual voltage and zero sequence current for faulted and non-faulted lines in case of isolated
systems ( sin ï ¿ ½ )
UE - residual voltage
IE - zero sequence current
IC - capacitive component of zero sequence current
IW - resistive component of zero sequence current
By calculating the reactive current component ( sin ï ¿ ½
adjustment) and then comparing the phase angle in
relation to the residual voltage UE, the ER/ XR-relay
type determines whether the line to be protected is
earth-faulted.
On non-earth-faulted lines, the capacitive component
Ic( a) of the total current precedes the residual
voltage by an angle of 90ï ¿ ½ . In case of a faulty line
the capacity current IC( b) lags behind the residual
voltage at 90ï ¿ ½ .
Figure 4.10: Phase position between the residual voltage and zero sequence current for faulted and non-faulted lines in case of
compensated systems ( cos ï ¿ ½ )
UE - residual voltage
IE - zero sequence current
IL - inductive component of zero sequence current
( caused by Petersen coil)
IC - capacitive component of zero sequence current
IW - resistive component of zero sequence current
In compensated mains the earthfault direction cannot
be determined from the reactive current components
because the reactive part of the earth current depends
upon the compensation level of the mains. The ohmic
component of the total current ( calculated by cos ï ¿ ½ adjustment)
is used in order to determine the direction.
The resistive component in the non-faulted line is in
phase with the residual voltage, while the resistive
component in the faulted line is opposite in phase with
the residual voltage.
By means of an efficient digital filter harmonics and
fault transients in the fault current are suppressed. Thus,
the uneven harmonics which, for instance, are caused
an electric arc fault, do not impair the protective function.
19 TB MRI1 09.98 E
4.6 Determining earth short-circuit
fault direction
The SR-relay type is used in solidly-earthed or resistance-
earthed systems for determining earth short-circuit
fault direction. The measuring principle for determining
the direction is based on phase angle measurement
and therefore also on the coincidence-time measurement
between earth current and zero sequence voltage.
The zero sequence voltage U0 required for determining
the earth short-circuit fault direction is generated internally
in the secondary circuit of the voltage transformers.
With SR/ ISR-relay types the zero sequence voltage U0
can be measured directly at the open delta winding
( e-n) . Connection A3/ A2.
4.6.1 Directly ï ¿ ½ earthed system
Most faults in a characteristic angle are predominantly
inductive in character. The characteristic angle between
current and voltage at which the greatest measuring
sensitivity is achieved has therefore been selected
to precede zero sequence voltage U0 by 110ï ¿ ½ .
Figure 4.11: Characteristic angle in solidly earthed-systems ( SOLI)
4.6.2 Resistance ï ¿ ½ earthed system
Most faults in a resistance-earthed system are predominantly
ohmic in character, with a small inductive
part. The characteristic angle for these types of system
has therefore been set at + 170ï ¿ ½ in relation to the zero
sequence voltage U0 ( see Figure 4.12) .
Figure 4.12: Characteristic angle in resistance-earthed systems
( RESI)
The pickup range of the directional element is set by
turning the current indicator at the characteristic angle
through + 90ï ¿ ½ , to ensure reliable determination of the
direction.
Figure 4.13: Adjustable characteristical angle of 45ï ¿ ½ to 309ï ¿ ½
For all other applications the characteristical angle between
45ï ¿ ½ and 309ï ¿ ½ is free selectable
20 TD_MRI3_11.07_GB
4.6.3 Connection possibilities of the voltage
transformers for SR relay types
Application Voltage transformer
connections
3-phase voltage
transformer connected
to terminals
A3, A5, A7, A2
( MRI3-IRSR;
MRI3-ISR;
MRI3-SR)
e-n winding
connected to
terminals A3, A2
( MRI3-ISR;
MRI3-SR)
Neutral-point voltage
( = residual voltage)
terminals A3, A2
( MRI3-ISR;
MRI3-SR)
4.7 Demand imposed on the main
current transformers
The current transformers have to be rated in such a
way, that a saturation should not occur within the following
operating current ranges:
Independent time overcurrent
function: K1 = 2
Inverse time overcurrent function: K1 = 20
High-set function: K1 = 1.2 - 1.5
K1 = Current factor related to set value
Moreover, the current transformers have to be rated
according to the maximum expected short circuit current
in the network or in the protected objects.
The low power consumption in the current circuit of
MRI3, namely , IE>
Measuring range overflow max. L1, L2, L3, E
Setting values:
phase ( I> ; CHAR I> ; tI> ; I> > ; tI> > )
earth ( IE> ; CHAR IE; tIE> ; IE> > ; tIE> > ; UE> )
Current settings
Trip delay
Characteristics

one time for each
parameter
I > ; CHAR I> ; tI> ; I> > ;
tI> > ; LED ï ¿ ½ ï ¿ ½
IE> ; CHAR IE; tIE> ; IE> > ;
tIE> > ; UE>
Current display as second rated repetition
current Iprim ( phase) / Iprim ( earth)
SEC ( 0.001-50.0 kA prim) L1, L2, L3, E
Parameter switch/ external triggering of
the fault recorder
SET1, SET2, B_S2, R_S2,
B_FR, R_FR, S2_FR
P2
LED blinking after activation FLSH, NOFL
Characteristics DEFT, NINV, VINV, EINV,
LINV, RINV
CHAR I>
Characteristics DEFT, NINV, VINV, EINV,
LINV, RINV, RXIDG
CHAR IE>
Reset setting ( only available at inverse
time characteristics)
0s / 60s

I> ; CHAR I> ; tI>
IE> ; CHAR IE> ; tIE>
Relay characteristic angle for pase current
directional feature
RCA in degree ( ï ¿ ½ )

LED ï ¿ ½ ï ¿ ½ ( green)
Warning or Trip at earth fault
measuring ( E- and ER/ XR-types)
TRIP
WARN

IE>
Measured method of the residual
voltage UE 1)
3 PHA ; E-N ; 1: 1

UE>
residual voltage setting voltage in volts UE>
changeover of isolated ( sin ï ¿ ½ )
or compensated ( cos ï ¿ ½ )
networks ( for ER/ XR-type)
SIN
COS

Change over of solidly/ resistance
earthed networks ( SR-type)
SOLI
RESI

Switch failure protection tCBFP
Tripping protection
switch failure protection
CBFP After fault tripping
Nominal frequency f= 50 / f= 60
Blocking of function EXIT until max. setting value LED of blocked
parameter
Slave address of serial interface 1 - 32

RS
Baud-Rate 2) 1200-9600 RS
Parity-Check 2) even odd no RS
Recorded fault data Tripping currents and other
fault data

one time for each phase
L1, L2, L3, E
I> , I> > , IE> , IE> > , UE>
Save parameter? SAV?
Delete failure memory wait
Enquiry failure memory FLT1; FLT2..... L1, L2, L3, E
I> , I> > , IE> , IE> > ,
Trigger signal for the fault recorder TEST, P_UP, A_PI, TRIP FR
Number of fault occurences S = 2, S = 4, S = 8 FR
Display of date and time Y = 99, M = 10, D = 1,
h = 12, m = 2, s = 12
ï ¿ ½
Change over the blocking function PR_B, TR_B und ;

I> , I> > , IE> , IE> > oder
tI> , tI> > , tIE> , tIE> >
1) refer to 4.4
2) only Modbus
22 TD_MRI3_11.07_GB
Function Display shows Pressed push button Corresponding LED
Blocking of the protection function BLOC, NO_B I> , I> > , IE> , IE> >
Save parameter! SAV! for about 3 s
Software version First part ( e.g. D01-)
Sec. part ( e.g. 8.00)

one time for each part
Manual trip TRI? three times
Inquire password PSW?
Relay tripped TRIP
or after fault tripping
Secret password input XXXX

System reset SEG
for about 3 s
Table 5.1: possible indication messages on the display
1) refer to 4.4
2) only Modbus
TD_MRI3_11.07_GB 23
5.2 Setting procedure
After push button has been pressed,
always the next measuring value is indicated. Firstly
the operating measuring values are indicated and then
the setting parameters. By pressing the push
button the setting values can directly be called up and
changed. Before parameter setting can be started the
relevant password must be entered ( refer to chapter
4.4 of the " MR Digital Multifunctional Relay " description) .
5.3 System parameter
5.3.1 Display of measuring values as
primary quantities ( Iprim phase)
With this parameter it is possible to show the indication
as primary measuring value. For this purpose the
parameter must be set to be equal with the rated primary
CT current. If the parameter is set to " SEK " , the
measuring value is shown as a multiple of the rated
secondary CT current.
Example:
The current transformer used is of 1500/ 5 A. The
flowing current is 1380 A. The parameter is set to
1500 A and on the display " 1380 A " are shown. If
the parameter is set to " SEK " , the value shown on the
display is " 0.92 " x In.
Note:
The pick-up value is set to a multiple of the rated secondary
CT current.
5.3.2 Display of earth current as primary
quantity ( Iprim earth)
The parameter of this function is to be set in the same
way as that described under 5.3.1. If the parameter is
not set to " SEK " , to relay types MRI3-X and MRI3-XR it
applies too, that the measuring value is shown as primary
current in ampere. Apart from that the indication
refers to % of IN.
5.3.3 Display of residual voltage UE
as primary quantity ( Uprim/ Usec)
The residual voltage can be shown as primary measuring
value. For this parameter the transformation ratio of
the VT has to be set accordingly. If the parameter is
set to " SEK " , the measuring value is shown as rated
secondary voltage.
Example:
The voltage transformer used is of 10 kV/ 100 V. The
transformation ratio is 100 and this value has to be set
accordingly. If still the rated secondary voltage should
be shown, the parameter is to be set to 1.
5.3.4 Voltage transformer connection for
residual voltage measuring
( 3pha/ e-n/ 1: 1)
Depending on the connection of the voltage transformer
of ER/ XR-relay types three possibilities of the
residual voltage measurement can be chosen
( see chapter 4.5) .
5.3.5 Nominal frequency
The adapted FFT-algorithm requires the nominal frequency
as a parameter for correct digital sampling
and filtering of the input currents.
By pressing the display shows " f= 50 " or
" f= 60 " . The desired nominal frequency can be adjusted
by or and then stored with .
5.3.6 Display of the activation storage
( FLSH/ NOFL)
If after an activation the existing current drops again
below the pickup value, e.g. I> , without a trip has
been initiated, LED I> signals that an activation has
occurred by flashing fast. The LED keeps flashing until
it is reset again ( push button ) . Flashing can
be suppressed when the parameter is set to NOFL.
24 TD_MRI3_11.07_GB
5.3.7 Parameter switch/ external
triggering of the fault recorder
By means of the parameter-change-over switches it is
possible to activate two different parameter sets.
Switching over of the parameter sets can either be
done by means of software or via the external inputs
RESET or blocking input. Alternatively, the external inputs
can be used for Reset or blocking of the triggering
of the fault recorder.
Softwareparameter
Blocking input
used as
RESET Input
use as
SET1 Blocking input RESET Input
SET2 Blocking input RESET Input
B_S2 Parameter switch RESET Input
R_S2 Blocking input Parameter
switch
B_FR Ext. triggering of
the FR
Reset input
R_FR Blocking input Ext. Trigger for
FR
S2_FR Parameter switch Ext. Trigger for
FR
With the settings SET1 or SET2 the parameter set is
activated by software. Terminals C8/ D8 and D8/ E8
are then available as external reset input or blocking
input.
With the setting B_S2 the blocking input ( D8, E8) is
used as parameter-set change-over switch. With the
setting R_S2 the reset input ( D8, E8) is used as parameter-
set change-over switch. With the setting B_FR
the fault recorder is activated immediately by using the
blocking input. On the front plate the LED FR will then
light up for the duration of the recording. With the setting
R_FR the fault recorder is activated via the reset
input. With the setting S2_FR parameter set 2 can be
activated via the blocking input and/ or the fault recorder
via the reset input.
The relevant function is then activated by applying the
auxiliary voltage to one of the external inputs.
Important note:
When functioning as parameter change over facility,
the external input RESET is not available for resetting.
When using the external input BLOCKING the protection
functions must be deactivated by software blocking
separately ( refer to chapter 5.7.1) .
5.4 Parameter protection
5.4.1 Pickup current for phase
overcurrent element ( I> )
The setting value for this parameter that appears on
the display is related to the nominal current ( IN) of the
relay. This means: pickup current ( Is) = displayed value
x nominal current ( IN) e.g. displayed value = 1.25
then, Is = 1.25 x IN.
5.4.2 Time current characteristics for
phase overcurrent element
( CHAR I> )
By setting this parameter, one of the following 6 messages
appears on the display:
DEFT - Definite Time
NINV - Normal Inverse
VINV - Very Inverse
EINV - Extremely Inverse
RINV - RI-Inverse
LINV - Long Time Inverse
Anyone of these four characteristics can be changed
by using -push buttons, and can be stored by
using -push button.
5.4.3 Trip delay or time factor for
phase overcurrent element ( tI> )
Usually, after the characteristic is changed, the time
delay or the time multiplier should be changed accordingly.
In order to avoid an unsuitable arrangement of
relay modes due to carelessness of the operator, the
following precautions are taken:
If, through a new setting, another relay characteristic
other than the old one has been chosen ( e.g. from
DEFT to NINV) , but the time delay setting has not been
changed despite the warning from the flashing LED,
the relay will be set to the most sensitive time setting
value of the selected characteristics after five minutes
warning of flashing LED tI> . The most sensitive time setting
value means the fastest tripping for the selected relay
characteristic. If a definite time characteristic has
been selected, the display shows the trip delay in seconds.
When selecting an inverse time characteristic,
the time multiplier appears on the display. Both settings
can be charges by push-buttons . When the
time delay or the time multiplier is set out of range
( Text " EXIT " appears on the display) , the low set element
of the overcurrent relay is blocked. The " WARN " -
relay will not be blocked.
TD_MRI3_11.07_GB 25
For the MRI3-version with directional feature, the different
trip time delays or the time multipliers can be
chosen for forward and backward faults.
By setting the trip delay, the actual set value for forward
faults appears on the display first and the LED
under the arrows is alight green. It can be changed
with push button and then stored with push
button . After that, the actual trip delay ( or
time factor) for backward faults appears on the display
by pressing push button and the LED under
the arrows is alight red.
Usually this set value should be set longer than the one
for forward faults, so that the relay obtains its selectivity
during forward faults. If the time delays are set
equally for both forward and backward faults, the relay
trips in both cases with the same time delay,
namely without directional feature.
Note:
When selecting dependent tripping characteristics at
relays with directional phase current detection, attention
must be paid that a clear directional detection will
be assured only after expiry of 40 ms.
5.4.4 Reset setting for all tripping characteristics
in the phase current path
To ensure tripping, even with recurring fault pulses
shorter than the set trip delay, the reset mode for inverse
time tripping characteristics can be switched
over. If the adjustment tRST is set at 60 s, the tripping
time is only reset after 60 s faultless condition. This
function is not available if tRST is set to 0. With fault
current cease the trip delay is reset immediately and
started again at recurring fault current.
5.4.5 Current setting for high set element
( I> > )
The current setting value of this parameter appearing
on the display is related to the rated current of the relay.
This means: I> > = displayed value x IN.
When the current setting for high set element is set out
of range ( on display appears " EXIT " ) , the high set element
of the overcurrent relay is blocked.
The high set element can be blocked via terminals
E8/ D8 if the corresponding blocking parameter is set
to bloc ( refer to chapter 5.7.1) .
5.4.6 Trip delay for high set element ( tI> > )
Independent from the chosen tripping characteristic for
I> , the high set element I> > has always a definite-time
tripping characteristic. An indication value in seconds
appears on the display.
The setting procedure for forward- or backward faults,
described in chapter 5.4.3, is also valid for the tripping
time of the high set element.
5.4.7 Relay characteristic angle RCA
The characteristic angle for directional feature in the
phase current path can be set by parameter RCA to
15ï ¿ ½ , 27ï ¿ ½ , 38ï ¿ ½ , 49ï ¿ ½ , 61ï ¿ ½ , 72ï ¿ ½ or 83ï ¿ ½ , leading to the
respective reference voltage ( see chapter 4.3) .
5.4.8 Pickup value for residual voltage
UE ( ER/ XR-relay type)
Regardless of the preset earth current, an earth fault is
only identified if the residual voltage exceeds the set
reference value. This value is indicated in volt.
5.4.9 Pickup current for earth fault
element ( IE> )
( Similar to chapter 5.4.1)
The pickup value of X and XR-relay type relates to %
IN.
5.4.10 WARN/ TRIP changeover
( E/ X and ER/ XR-relay type)
A detected earth fault can be parameterized as follows.
After delay time.
a) " warn " only the alarm relay trips
b) " trip " the trip relay trips and tripping values are
stored.
26 TD_MRI3_11.07_GB
5.4.11 Time current characteristics for
earth fault element ( CHAR IE)
( not for ER/ XR-relay type)
By setting this parameter, one of the following 7 messages
appears on the display:
DEFT - Definite Time ( independent overcurrent
time protection)
NINV - Normal inverse ( Type A)
VINV - Very inverse ( Type B)
EINV - Extremely inverse ( Type C)
RINV RI-Inverse
LINV Long Time Inverse
RXID Special characteristic
Anyone of these four characteristics can be chosen by
using -pushbuttons, and can be stored by using
-pushbutton.
5.4.12 Trip delay or time multiplier for
earth fault element ( tIE> > )
( Similar to chapter 5.4.3)
5.4.13 Reset mode for inverse time
tripping in earth current path
( Similar to chapter 5.4.4)
5.4.14 Current setting for high set element
of earth fault supervision ( IE> > )
( Similar to chapter 5.4.5)
The pickup value of X and XR-relay type relates to % IN.
5.4.15 Trip delay for high set element
of earth fault supervision ( tIE> > )
( Similar to chapter 5.4.6)
5.4.16 COS/ SIN Measurement
( ER/ XR-relay type)
Depending on the neutral earthing connection of the
protected system the directional element of the earth
fault relay must be preset to cos ï ¿ ½ or sin ï ¿ ½ measurement.
By pressing the display shows " COS " resp.
" SIN " . The desired measuring principle can be selected
by or and must be entered with password.
5.4.17 SOLI/ RESI changeover
( SR-relay type)
Depending on the method of neutral-point connection
of the system to be protected, the directional element
for the earth-current circuit must be set to " SOLI " ( = solidly
earthed) or " RESI " = ( resistance earthed) .
5.4.18 Block/ Trip ï ¿ ½ time
The block/ trip time serves for detection of a c.b. failure
protection by rear interlocking. It is activated by
setting the blocking input D8/ E8 and by setting the
parameter to TR_B. After the set block/ trip time has
expired, the relay can be tripped if the excitation of a
protective function has been applied the delay time of
which has expired and the blocking function is still active.
If the parameter PR_B is set, the individual protection
stages are blocked ( refer to Chapter 5.7.1) .
5.4.19 Circuit breaker failure protection
tCBFP
The CB failure protection is based on supervision of
phase currents during tripping events. Only after tripping
this protective function becomes active. The test
criterion is whether all phase currents are dropped to
; IE> ; IE> > are simultaneously alight in case of
protective blocking " PR_B " and LEDs tI> ; tI> > ; tIE> ,
tIE> > simultaneously emit light in case of trip
blocking " TR_B " .
ï ¿ ½ Actuation of the key with a one-time entry
of the password will store the set function.
ï ¿ ½ After this actuate the key to call
up the first blockable protection function.
ï ¿ ½ The display will show the text " BLOC " ( the respective
function is blocked) or " NO_B " ( the respective
function is not blocked.
ï ¿ ½ Actuation of the key will store the set
function.
ï ¿ ½ By pressing the pushbutton, all
further protective function that can be blocked are
called one after the other.
After selection of the last blocking function renewed
pressing of the pushbutton switches
to the assignment mode of the output relays.
Function Display LED/ Colour
Blocking of the protection
stage
PR_B I> ; I> > ; IE> ;
IE> >
Blocking of the trip function TR_B tI> ; tI> > ; tIE> ;
tIE> >
I> Overcurrent NO_B I> red
I> > Short circuit BLOC I> > red
IE> Earth current
1st element
NO_B IE> red
IE> > Earth current
2nd element
NO_B IE> > red
tCBFP Circuit breaker
failure protection
NO_B CB green
Table 5.2: Default settings of both parameter sets
Assignment of the output relays:
Unit MRI3 has five output relays. The fifth output relay
is provided as permanent alarm relay for self supervision
is normally on. Output relays 1 - 4 are normally
off and can be assigned as alarm or tripping relays to
the current functions which can either be done by using
the push buttons on the front plate or via serial interface
RS485. The assignment of the output relays is
similar to the setting of parameters, however, only in
the assignment mode. The assignment mode can be
reached only via the blocking mode.
By pressing push button in blocking
mode again, the assignment mode is selected.
The relays are assigned as follows: LEDs I> , I> > , IE> ,
IE> > are two-coloured and light up green when the output
relays are assigned as alarm relays and red as
tripping relays.
In addition, the LED ï ¿ ½ ï ¿ ½ also lights up with each adjustment.
Green means forward and red backward direction.
Definition:
Alarm relays are activated at pickup.
Tripping relays are only activated after elapse of the
tripping delay.
TD_MRI3_11.07_GB 29
After the assignment mode has been activated, first
LED I> lights up green. Now one or several of the four
output relays can be assigned to current element I> as
alarm relays. At the same time the selected alarm relays
for frequency element 1 are indicated on the display.
Indication " 1___" means that output relay 1 is
assigned to this current element. When the display
shows " ____" , no alarm relay is assigned to this current
element. The assignment of output relays 1 - 4 to
the current elements can be changed by pressing
and push buttons. The selected assignment can be
stored by pressing push button and subsequent
input of the password. By pressing push button
, LED I> lights up red. The output relays
can now be assigned to this current element as
tripping relays.
Relays 1 - 4 are selected in the same way as described
before. By repeatedly pressing of the
push button and assignment of the
relays all elements can be assigned separately to the
relays. The assignment mode can be terminated at any
time by pressing the push button for
some time ( abt. 3 s) .
Note:
ï ¿ ½ The function of jumper J2 described in general description
" MR Digital Multifunctional Relays " has no
function. For relays without assignment mode this
jumper is used for parameter setting of alarm relays
( activation at pickup or tripping) .
ï ¿ ½ A form is attached to this description where the setting
requested by the customer can be filled-in. This
form is prepared for fax transmission and can be
used for your own reference as well as for telephone
queries.
Relay function Output relays Display- Lighted LED
2 3 4 indication
I> ( V) alarm X _2 __I> ; ï ¿ ½ ï ¿ ½ green
tI> ( V) tripping X 1 ___tI> ; ï ¿ ½ ï ¿ ½ green
I> ( R) alarm X _2 __I> ; ï ¿ ½ ï ¿ ½ red
tI> ( R) tripping X 1 ___tI> ; ï ¿ ½ ï ¿ ½ red
I> > ( V) alarm X __3 _I> > ; ï ¿ ½ ï ¿ ½ green
tI> > ( V) tripping X 1 ___tI> > ; ï ¿ ½ ï ¿ ½ green
I> > ( R) alarm X __3 _I> > ; ï ¿ ½ ï ¿ ½ red
tI> > ( R) tripping X 1 ___tI> > ; ï ¿ ½ ï ¿ ½ red
IE> ( V) alarm X ___4 IE> ; ï ¿ ½ ï ¿ ½ green
tIE> ( V) tripping X 1 ___tIE> ; ï ¿ ½ ï ¿ ½ green
IE> ( R) alarm X ___4 IE> > ; ï ¿ ½ ï ¿ ½ red
tIE> ( R) tripping X 1 ___tIE> > ; ï ¿ ½ ï ¿ ½ red
IE> > ( V) alarm X ___4 IE> > ; ï ¿ ½ ï ¿ ½ green
tIE> > ( V) tripping X 1 ___tIE> > ; ï ¿ ½ ï ¿ ½ green
IE> > ( R) alarm X ___4 IE> > ; ï ¿ ½ ï ¿ ½ red
tIE> > ( R) tripping X 1 ___tIE> > ; ï ¿ ½ ï ¿ ½ red
tCBFP tripping ____C.B.; red
( V) = forward direction;
( R) = backward direction
This way, a tripping relay can be set for
each activation and tripping direction.
Table 5.4: Example of assignment matrix of the output relays ( default settings) .
30 TD_MRI3_11.07_GB
5.8 Setting value calculation
5.8.1 Definite time overcurrent element
Low set element ( I> )
The pickup current setting is determined by the load
capacity of the protected object and by the smallest
fault current within the operating range. The pickup
current is usually selected about 20% for power lines,
about 50% for transformers and motors above the
maximum expected load currents.
The delay of the trip signal is selected with consideration
to the demand on the selectivity according to system
time grading and overload capacity of the protected
object.
High set element ( I> > )
The high set element is normally set to act for near-by
faults. A very good protective reach can be achieved
if the impedance of the protected object results in a
well-defined fault current. In case of a line-transformer
combination the setting values of the high set element
can even be set for the fault inside the transformer.
The time delay for high set element is always independent
to the fault current.
5.8.2 Inverse time overcurrent element
Beside the selection of the time current characteristic
one set value each for the phase current path and
earth current path is adjusted.
Low set element I>
The pickup current is determined according to the
maximum expected load current. For example:
Current transformer ratio: 400/ 5 A
Maximum expected load current: 300 A
Overload coefficient: 1.2 ( assumed)
Starting current setting:
Is = ( 300/ 400) x 1.2 = 0.9 x IN
Time multiplier setting
The time multiplier setting for inverse time overcurrent is
a scale factor for the selected characteristics. The
characteristics for two adjacent relays should have a
time interval of about 0.3 - 0.4 s.
High set element I> >
The high set current setting is set as a multiplier of the
nominal current. The time delay tI> > is always independent
to the fault current.
5.9 Indication of measuring and fault
values
5.9.1 Indication of measuring values
The following measuring quantities can be indicated
on the display during normal service:
ï ¿ ½ Apparent current in phase 1 ( LED L1 green) ,
ï ¿ ½ active current in Phase 1 ( LED L1 and IP green) , *
ï ¿ ½ reactive current in Phase 1 ( LED L1 and IQ green) , *
ï ¿ ½ apparent current in phase 2 ( LED L2 green) ,
ï ¿ ½ active current in Phase 2 ( LED L2 and IP green) , *
ï ¿ ½ reactive current in Phase 2 ( LED L2 and IQ green) , *
ï ¿ ½ apparent current in phase 3 ( LED L3 green) ,
ï ¿ ½ active current in Phase 3 ( LED L3 and IP green) , *
ï ¿ ½ reactive current in Phase 3 ( LED L3 and IQ green) , *
ï ¿ ½ apparent earth current ( LED E green) ,
ï ¿ ½ active earth current ( LED E and IP green) , *
ï ¿ ½ reactive earth current ( LED E and IQ green) , *
ï ¿ ½ residual voltage UR ( LED UE) only at ER/ XR-relay
type,
ï ¿ ½ angle between IE and UE ( only ER/ XR)
( LED E green, LED IE> yellow and LED UE> yellow) .
* only in case that the directional option is built in.
The indicated current measuring values refer to rated
current. ( For MRI3-XR/ X relays the indicated measuring
values refer to % of IN)
TD_MRI3_11.07_GB 31
5.9.2 Units of the measuring values
displayed
The measuring values can optionally be shown in the
display as a multiple of the " sec " rated value ( xln) or as
primary current ( A) . According to this the units of the
display change as follows:
Phase current:
Indication as Range Unit
Secondary current
Active portion IP
Reactive portion IQ
0.00 ï ¿ ½ 40.0
ï ¿ ½ .00 ï ¿ ½ 40
ï ¿ ½ .00 ï ¿ ½ 40.
x In
x In
x In
Primary current .000 ï ¿ ½ 999.
k000 ï ¿ ½ k999
1k00 ï ¿ ½ 9k99
10k0 ï ¿ ½ 99k0
100k ï ¿ ½ 999k
1M00 ï ¿ ½ 2M00
A
kA*
kA
kA
kA
MA
active portion IP ï ¿ ½ .00 ï ¿ ½ ï ¿ ½ 999
ï ¿ ½ k00 ï ¿ ½ ï ¿ ½ k99
ï ¿ ½ 1k0 ï ¿ ½ ï ¿ ½ 9k9
ï ¿ ½ 10k ï ¿ ½ ï ¿ ½ 99k
ï ¿ ½ M10 ï ¿ ½ ï ¿ ½ M99
ï ¿ ½ 1M0 ï ¿ ½ ï ¿ ½ 2M0
A
kA*
kA
kA
MA
MA
Reactive portion IQ ï ¿ ½ .00 ï ¿ ½ ï ¿ ½ 999
ï ¿ ½ k00 ï ¿ ½ ï ¿ ½ k99
ï ¿ ½ 1k0 ï ¿ ½ ï ¿ ½ 9k9
ï ¿ ½ 10k ï ¿ ½ ï ¿ ½ 99k
ï ¿ ½ M10 ï ¿ ½ ï ¿ ½ M99
ï ¿ ½ 1M0 ï ¿ ½ ï ¿ ½ 2M0
A
kA*
kA
kA
MA
MA
* rated current transformer > 2kA
Earth current ( sensitive) :
Indication as Range Unit
Secondary current
Active portion IP
Reactive portion IQ
( X/ XR types)
.000 ï ¿ ½ 15.0
ï ¿ ½ .00 ï ¿ ½ 15
ï ¿ ½ .00 ï ¿ ½ 15
x In
x In
x In
Primary earth
current
00m0 ï ¿ ½ 99m9
100m ï ¿ ½ 999m
.000 ï ¿ ½ 999.
k000 ï ¿ ½ k999
1k00 ï ¿ ½ 9k99
mA*
mA*
A
kA*
kA
Active portion IP ï ¿ ½ 00m - ï ¿ ½ 99m
ï ¿ ½ .10 ï ¿ ½ ï ¿ ½ 999
ï ¿ ½ k00 ï ¿ ½ ï ¿ ½ k99
ï ¿ ½ 1k0 ï ¿ ½ ï ¿ ½ 9k9
mA*
A
kA* *
kA
Reactive portion IQ ï ¿ ½ 00m - ï ¿ ½ 99m
ï ¿ ½ .00 ï ¿ ½ ï ¿ ½ 999
ï ¿ ½ k00 ï ¿ ½ ï ¿ ½ k99
ï ¿ ½ 1k0 ï ¿ ½ ï ¿ ½ 9k9
mA*
A
kA* *
kA
* rated current transformer 0.019kA
* * rated current transformer 20kA
Earth current ( normal) :
Indication as Range Unit
Secondary current
Active portion IP
Reactive portion IQ
( E/ SR/ ER types)
.000 ï ¿ ½ 15.0
ï ¿ ½ .00 ï ¿ ½ 15
ï ¿ ½ .00 ï ¿ ½ 15.
x In
x In
x In
Primary earth
current
.000 ï ¿ ½ 999.
k000 ï ¿ ½ k999
1k00 ï ¿ ½ 9k99
10k0 ï ¿ ½ 99k0
100k ï ¿ ½ 999k
1M00 ï ¿ ½ 2M00
A
kA*
kA
kA
kA
MA
Active portion IP ï ¿ ½ .00 ï ¿ ½ ï ¿ ½ 999
ï ¿ ½ k00 ï ¿ ½ ï ¿ ½ k99
ï ¿ ½ 1k0 ï ¿ ½ ï ¿ ½ 9k9
ï ¿ ½ 10k ï ¿ ½ ï ¿ ½ 99k
ï ¿ ½ M10 ï ¿ ½ ï ¿ ½ M99
ï ¿ ½ 1M0 ï ¿ ½ ï ¿ ½ 2M0
A
kA*
kA
kA
MA
MA
Reactive portion IQ ï ¿ ½ .00 ï ¿ ½ ï ¿ ½ 999
ï ¿ ½ k00 ï ¿ ½ ï ¿ ½ k99
ï ¿ ½ 1k0 ï ¿ ½ ï ¿ ½ 9k9
ï ¿ ½ 10k ï ¿ ½ ï ¿ ½ 99k
ï ¿ ½ M10 ï ¿ ½ ï ¿ ½ M99
ï ¿ ½ 1M0 ï ¿ ½ ï ¿ ½ 2M0
A
kA*
kA
kA
MA
MA
* rated current transformer > 2kA
Earth voltage:
Indication as Range Unit
sec. Voltage 000V ï ¿ ½ 999V V
primary voltage .000 ï ¿ ½ 999V
1K00 ï ¿ ½ 9K99
10K0 ï ¿ ½ 99K9
100K ï ¿ ½ 999K
1M00 ï ¿ ½ 3M00
KV
KV
KV
KV
MV
5.9.3 Indication of fault data
All faults detected by the relay are indicated on the
front plate optically. For this purpose, the four LEDs ( L1,
L2, L3, E) and the four function LEDs ( I> , I> > , IE> ,
IE> > und ï ¿ ½ ï ¿ ½ ) are equipped at MRI3. Not only fault
messages are transmitted, the display also indicates
the tripped protection function. If, for example an
overcurrent occurs, first the corresponding LEDs will
light up. LED I> lights up at the same time. After tripping
the LEDs are lit permanently.
32 TD_MRI3_11.07_GB
5.9.4 Fault memory
When the relay is energized or trips, all fault data and
times are stored in a non-volatile memory manner. The
MRI3 is provided with a fault value recorder for max.
five fault occurrences. In the event of additional trippings
always the oldest data set is written over.
For fault indication not only the trip values are recorded
but also the status of LEDs. Fault values are indicated
when push buttons or are pressed
during normal measuring value indication.
ï ¿ ½ Normal measuring values are selected by pressing
the button.
ï ¿ ½ When then the button is pressed, the latest fault
data set is shown. By repeated pressing the
button the last but one fault data set is shown etc.
For indication of fault data sets abbreviations FLT1,
FLT2, FLT3, ... are displayed ( FLT1 means the latest
fault data set recorded) . At the same time the parameter
set active at the occurrence is shown.
ï ¿ ½ By pressing the fault measuring
values can be scrolled.
ï ¿ ½ By pressing it can be scrolled back to a more
recent fault data set. At first FLT8, FLT7, ... are always
displayed. When fault recording is indicated
( FLT1 etc) , the LEDs flash in compliance with the
stored trip information, i.e. those LEDs which
showed a continuous light when the fault occurred
are now blinking blinking to indicate that it is not a
current fault. LEDs which were blinking blinking during
trip conditions, ( element had picked up) just
briefly flash.
ï ¿ ½ If the relay is still in trip condition and not yet reset
( TRIP is still displayed) , no measuring values can be
shown.
ï ¿ ½ To delete the trip store, the push button combination
and has to be pressed
for about 3s. The display shows ï ¿ ½ waitï ¿ ½ .
Recorded fault values:
Value displayed Relevant LED
Phase currents L1, L2, L3 in I/ In L1, L2, L3
Earth current IE in I/ IEn E
C.B. switching time in s 1) C.B.
Expired tripping time of I>
in % of tI> 2)
I>
Expired tripping time of IE>
in % of tIE> 2)
IE>
Time stamp
Date: Y = 99
M = 04
D = 20
ï ¿ ½
ï ¿ ½
ï ¿ ½
time: h = 11
m = 59
s = 13
ï ¿ ½
ï ¿ ½
ï ¿ ½
Table 5.3
1) C.B. tripping time:
Time between energizing of the trip output relay
and switching of the C.B. ( current and IE> .
5.10 Reset
Unit MRI3 has the following three possibilities to reset
thedisplay of the unit as well as the output relay at
jumper position J3= ON.
Manual Reset
ï ¿ ½ Pressing the push button for some
time ( about 3 s)
Electrical Reset
ï ¿ ½ Through applying auxiliary voltage to C8/ D8
Software Reset
ï ¿ ½ The software reset has the same effect as the
push button ( see also communication
protocol of RS485 interface) .
The display can only be reset when the pickup is not
present anymore ( otherwise " TRIP " remains in display) .
During resetting of the display the parameters are not
affected.
5.10.1 Erasure of fault storage
The fault storage is erased by pressing the key combination
and for about 3 s. At the
display " Wait " appears.
TD_MRI3_11.07_GB 33
6 Relay testing and
commissioning
The test instructions following below help to verify the
protection relay performance before or during commissioning
of the protection system. To avoid a relay
damage and to ensure a correct relay operation, be
sure that:
ï ¿ ½ The auxiliary power supply rating corresponds to the
auxiliary voltage on site.
ï ¿ ½ The rated current and rated voltage of the relay correspond
to the plant data on site.
ï ¿ ½ The current transformer circuits and voltage transformer
circuits are connected to the relay correctly.
ï ¿ ½ All signal circuits and output relay circuits are connected
correctly.
6.1 Power-On
NOTE!
Prior to switch on the auxiliary power supply, be sure
that the auxiliary supply voltage corresponds with the
rated data on the type plate.
Switch on the auxiliary power supply to the relay and
check that the message " ISEG " appears on the display
and the self supervision alarm relay ( watchdog) is energized
( Contact terminals D7 and E7 closed) .
6.2 Testing the output relays and LEDs
NOTE!
Prior to commencing this test, interrupt the trip circuit to
the circuit breaker if tripping is not desired.
By pressing the push button once, the display
shows the first part of the software version of the relay
( e.g. ï ¿ ½ D08-ï ¿ ½ ) . By pressing the push button
twice, the display shows the second part of the software
version of the relay ( e.g. ï ¿ ½ 4.01ï ¿ ½ ) . The software
version should be quoted in all correspondence. Pressing
the button once more, the display shows
" PSW? " . Please enter the correct password to proceed
with the test. The message " TRI? " will follow. Confirm
this message by pressing the push button
again. All output relays should then be activated and
the self supervision alarm relay ( watchdog) be deactivated
one after another with a time interval of
3 second and all LEDs with a delay of 0.5 seconds,
with the self-supervision relay dropping. Thereafter, reset
all output relays back to their normal positions by
pressing the push button ( about 3 s) .
6.3 Checking the set
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