ABB REX 521 Technical Reference Manual, Standard Configurations Download

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1MRS751802-MUM

REX 521

Protection Relay

Technical Reference Manual, Standard Configurations

3.2.

HW version: Medium

3.2.1.

Standard configuration M01

3.2.1.1.

Features

• Three-phase non-directional overcurrent protection with three stages

• Three-phase transformer inrush and motor start-up current detector

• Directional earth fault protection with three stages

• Phase discontinuity protection for three phases

• Three-phase thermal protection for cables

• Supervision function for the energizing current input circuit

• Current waveform distortion measurement

• Three-phase current measurement

• Neutral current measurement

• Residual voltage measurement

• Calculation of the accumulated electric breaker wear of the circuit breaker (CB)

• Transient disturbance recorder

• Trip-circuit supervision

• Delayed trip output for the circuit-breaker failure protection (CBFP) function

• Circuit breaker control with indication

• Lockout function

• Object indication

• Logic control position selector

• User-configurable I/Os

• Interlocking

• User-configurable alarm LEDs

Summary of Contents for REX 521

Page 1: ...Protection Relay REX 521 Technical Reference Manual Standard Configurations ...

Page 2: ......

Page 3: ... Application 24 3 1 2 Standard configuration B02 26 3 1 2 1 Features 26 3 1 2 2 Application 27 3 2 HW version Medium 29 3 2 1 Standard configuration M01 29 3 2 1 1 Features 29 3 2 1 2 Application 30 3 2 2 Standard configuration M02 32 3 2 2 1 Features 32 3 2 2 2 Application 33 3 3 HW version High Sensor 35 3 3 1 Standard configuration H01 Sensor 35 3 3 1 1 Features 35 3 3 1 2 Application 36 3 3 2 ...

Page 4: ... 4 1 3 Input signals 66 4 2 Function blocks in the overview diagrams of the signal routings 67 4 2 1 Function blocks 67 4 3 Output switchgroups SWGRP 68 4 3 1 Output selectors 68 4 4 Other functions described in signal overview diagrams 69 4 4 1 Lockout function 69 5 Parametrization of the digital inputs 73 5 1 Selectors 73 5 1 1 Reset 73 5 1 2 Group 73 5 1 3 Blocking 73 5 1 4 Disturbance recorder...

Page 5: ...7 1 8 Iub 98 7 1 9 3Ith 98 7 1 10 O I 99 7 1 11 Uo Uo and Uo 101 7 1 12 f1 and f2 102 7 1 13 SYNC1 103 7 1 14 Is2t n 104 7 1 15 3I 105 7 1 16 I2 and I2 106 7 1 17 3I 107 7 1 18 FUSEF 108 7 1 19 3Ithdev 109 7 1 20 U1 U1U2 110 7 2 Control 111 7 2 1 I O CB1 111 7 2 2 I O IND1 and I O IND2 112 7 2 3 I O POS 112 7 2 4 I O IND3 112 7 2 5 ALARM1 8 112 7 3 Measurement 115 7 3 1 3I 115 7 3 2 Io 116 7 3 3 U...

Page 6: ...al overload protection 137 9 1 4 Connections and signal routings 138 9 1 4 1 Protection signal routing 138 9 1 4 2 Indication and control connections 140 9 1 5 Implementations 142 9 1 5 1 Outgoing blocking signal to the incoming feeder 143 9 1 5 2 Blocking signal received from the residual voltage relay 143 9 1 5 3 Circuit breaker failure protection 143 9 1 5 4 Trip circuit supervision 144 9 1 5 5...

Page 7: ...plementations 160 9 3 4 1 Blocking signal from the MV relay on the secondary side of the transformer 160 9 3 4 2 Circuit breaker failure protection 161 9 3 5 Blocking signal overview 162 9 4 Outgoing feeder Basic B02 163 9 4 1 Features 163 9 4 2 Measurement connections 166 9 4 3 Protection 166 9 4 3 1 Auto reclosure function 167 9 4 4 Protection signal routing 169 9 4 5 Indication and control conn...

Page 8: ...locking signal received from the outgoing feeder 185 10 2 5 3 Outgoing blocking signal to the overcurrent relay on the HV side 186 10 2 5 4 Trip signal from second residual voltage stage 186 10 2 5 5 Second settings for residual voltage protection 186 10 2 5 6 Circuit breaker failure protection 187 10 2 5 7 Trip circuit supervision 187 10 3 Outgoing feeder Medium M02 188 10 3 1 Features 188 10 3 2...

Page 9: ...gnal received from the outgoing feeder and the bus sectionalizer 208 11 2 5 2 Blocking signal from 3I stage to 3I stage 209 11 2 5 3 Circuit breaker failure protection 209 11 2 5 4 Trip circuit supervision 210 11 3 Bus sectionalizer High H03 210 11 3 1 Features 210 11 3 2 Measurements 213 11 3 3 Protection 213 11 3 3 1 Overcurrent protection 213 11 3 3 2 Synchro check function 214 11 3 4 Connectio...

Page 10: ...224 11 5 5 5 Disturbance recorder 224 11 5 5 6 Power quality 225 11 6 Measurement cubicle High H06 226 11 6 1 Features 226 11 6 2 Measurements 228 11 6 3 Protection 228 11 6 3 1 Residual voltage protection 228 11 6 3 2 Overvoltage and undervoltage protection 228 11 6 3 3 Underfrequency protection 229 11 6 4 Connections 229 11 6 4 1 Protection signal routing 229 11 6 4 2 Indication and control conn...

Page 11: ...ection 243 11 8 3 1 Phase overcurrent protection 243 11 8 3 2 Earth fault protection 243 11 8 3 3 Overvoltage and undervoltage protection 243 11 8 4 Connections 244 11 8 4 1 Protection signal routing 244 11 8 4 2 Indication and control connections 245 11 8 5 Implementations 245 11 8 5 1 Blocking signal received from the outgoing feeder 245 11 8 5 2 Outgoing blocking signal to the overcurrent relay...

Page 12: ...12 ...

Page 13: ...ny software or hardware described in this document This document and parts thereof must not be reproduced or copied without written permission from ABB Oy and the contents thereof must not be imparted to a third party nor used for any unauthorized purpose The software or hardware described in this document is furnished under a license and may be used copied or disclosed only in accordance with the...

Page 14: ...rystal display LED Light emitting Diode MCB Miniature Circuit Breaker MMI Man machine interface NC Normally closed NO Normally open NPS Negative Phase Sequence PO Power output RS Rogowski sensor RTC Real time clock RTU Remote Terminal Unit SA Substation automation SO Signalling output TCS Trip circuit supervision VD Voltage divider VT Voltage transformer Technical Reference Manual General 1MRS7511...

Page 15: ...8 MUM CAP 501 Installation and Commissioning Manual 1MRS751899 MEN CAP 501 User s Guide 1MRS751900 MUM Version Date History F 22 6 2004 New configuration H08 Section 3 3 8 Standard configuration H08 No sensors Configuration H08 added to Table 2 1 Table 6 1 Table 6 3 and Table 6 5 Text added to Section 5 1 11 Direct control Open Close Section 7 3 3 Uo and Section 7 3 5 3U New function 3U_B Section ...

Page 16: ...lectronic components must therefore be avoided The frame of the device has to be carefully earthed Only a competent electrician is allowed to carry out the electrical installation Non observance can result in death personal injury or substantial property damage Breaking the sealing tape on the upper handle of the device will result in loss of warranty and proper operation will no longer be guarant...

Page 17: ...standard configuration is indicated as the letter S in the Config name parameter for example H02S Differences between REX 521 and RED 500 platform in the function block descriptions The REX 521 and the RED 500 platform differ in some respects concerning the function block descriptions in the CD ROM Technical Descriptions of Functions see Section 1 5 Related documents Firstly there are some terms t...

Page 18: ...1 37 x FUSEF FuseFail 60 x 3Ithdev Tol3Dev 49M x x x U1 U1U2 PSV3St1 27 47 59 x Control functions I O CB1 COCB1 x x x x x x x x x x x x x I O IND1 COIND1 x x x x x x x x x x x x x I O IND2 COIND2 x x x x x x x x x x x x x I O IND3 COIND3 x 5 I O POS COLOCAT x x x x x x x x x x x x x ALARM1 8 MMIALAR1 8 x x x x x x x x x x x x x Measurement 3I MECU3A x x x x x x x x x x x x x Io MECU1A x x x x x x ...

Page 19: ... H036 7 H047 H057 H06 H07 H08 7 8 H09 7 8 Function blocks FB name in CD ROM IEEE device number Table 2 2 Protection functions available in the different standard configurations of REX 521 Function Description Is2t n Three phase motor start up supervision 3I Three phase non directional overcurrent protection low set stage 3I Three phase non directional overcurrent protection high set stage 3I Three...

Page 20: ...se failure protection SYNC1 Synchro check voltage check function Table 2 3 Control functions available in the different standard configurations of REX 521 Function Description I O CB1 Circuit breaker control with indication I O IND1 Object indication I O IND2 Object indication I O IND3 Object indication I O POS Logic control position selector ALARM1 8 Alarm LED 1 8 Table 2 4 Measurement functions ...

Page 21: ...ker electric wear 1 TCS1 Trip circuit supervision 1 MCS 3I Supervision function of the energizing current input circuit MCS 3U Supervision function of the energizing voltage input circuit TIME1 Operation time counter Table 2 6 Power quality monitoring function available in the different standard configurations of REX 521 Function Description PQ 3Inf Current waveform distortion measurement PQ 3Unf ...

Page 22: ...22 ...

Page 23: ...t up current detector Supervision function for the energizing current input circuit Current waveform distortion measurement Three phase current measurement Neutral current measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB Transient disturbance recorder Trip circuit supervision Delayed trip output for the circuit breaker failure protection CBFP function Circ...

Page 24: ...ctive short circuit time overcurrent and earth fault protection of radial isolated neutral networks solidly earthed networks resistant earthed networks and resonant earthed networks For more detailed information refer to the application examples of B01 on Section 9 1 Outgoing feeder Basic B01 Section 9 2 Incoming feeder Basic B01 and Section 9 3 Transformer feeder Basic B01 49F 3 3I 50 51 I 0 50N ...

Page 25: ...3I 3I Io Io Io Iub 3Ith CBFP I O CB1 I O CB1 Lockout Working DC1 DC2 ES1 ES2 I O IND2 DC2 ES2 DC1 ES1 CBO CBO DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI9 O C E F Iub 3Ith PQ 3Inf BS2 3I BS2 3I BS2 3I BS2 Io BS2 Io BS2 Io BS2 Iub BS 3Ith Master trip Lockout reset Lockout reset O C E F Iub 3Ith PQ 3Inf O C E F Iub 3Ith BS1 3I BS1 3I BS1 3I BS1 Io BS1 Io BS1 Io BS1 Iub DREC IL1 IL2 IL3 Io Uo BI1 BI2 BI3 BI4 ...

Page 26: ...rmal protection for cables Supervision function for the energizing current input circuit Current waveform distortion measurement Three phase current measurement Neutral current measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB Transient disturbance recorder Trip circuit supervision Delayed trip output for the circuit breaker failure protection CBFP function...

Page 27: ...on time overcurrent protection earth fault protection and automatic reclosing The configuration can be used in different types of networks such as radial isolated neutral networks solidly earthed networks resistant earthed networks and resonant earthed networks For more detailed information about the configuration refer to the application examples of the standard configuration B02 on Section 9 4 O...

Page 28: ...ar PQ 3Inf cum CB wear Lockout Lockout Lockout reset S Q R Lockout Working HSPO1 Master Trip Open SHOT1 SHOT2 SHOT3 SHOT4 SHOT5 TRDUE TDDUE ACTIVE AR1TRIP AR2TRIP AR3TRIP AR4TRIP CBFAIL DEFTRIP LOCKOUT SHOT_ALARM AR1TRIP AR2TRIP AR3TRIP AR4TRIP CBFAIL DEFTRIP LOCKOUT SHOT_ALARM I 0 CB1 open I 0 CB1 close 3Ith MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear 1 DREC IL1 IL2 IL3 Io Uo BI1 BI2 BI3 BI4 BI5 ...

Page 29: ...phase thermal protection for cables Supervision function for the energizing current input circuit Current waveform distortion measurement Three phase current measurement Neutral current measurement Residual voltage measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB Transient disturbance recorder Trip circuit supervision Delayed trip output for the circuit br...

Page 30: ...ective short circuit time overcurrent and directional earth fault protection of radial isolated neutral networks solidly earthed networks resistant earthed networks and resonant earthed networks For more detailed information about the configuration refer to the application examples of the standard configuration M01 on Chapter 10 Application examples Medium and Section 10 2 Incoming feeder Medium M...

Page 31: ...1 3I 3I 3I Io Io Io Iub 3Ith Start 2 3I 3I BSOUT Alarm 1 I 0 CB1 open I 0 CB1 close 3Ith MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear Lockout Close 3I 3I 3I Io Io Io Iub 3Ith CBFP DREC IL1 IL2 IL3 Io Iob Uo BI1 BI2 BI3 BI4 BI5 BI6 BI7 BI8 BI9 BI10 BI11 BI12 BI13 BI14 BI15 BI16 EXT_TRG Start 3I Start 3I Start 3I Start Io Start Io Start Io Start 3Iub Start 3Ith Trip 3I Trip 3I Trip 3I Trip Io Trip Io...

Page 32: ...or cables Supervision function for the energizing current input circuit Current waveform distortion measurement Three phase current measurement Neutral current measurement Residual voltage measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB Transient disturbance recorder Trip circuit supervision Delayed trip output for the circuit breaker failure protection C...

Page 33: ...ercurrent protection directional earth fault protection and automatic reclosing The configuration can be used in different types of networks such as of radial isolated neutral networks solidly earthed networks resistant earthed networks and resonant earthed networks For more detailed information about the configuration refer to the application examples of the standard configuration M02 on Section ...

Page 34: ...SET START TRIP CBFP Io CBFP BACTRL BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP I O CB1 OPEN CLOSE CLOSEENA BINOPEN BINCLOSE OOPEN OCLOSE AOPEN ACLOSE 3I IL1 IL2 IL3 Io Io I O IND1 BINOPEN BINCLOSE I O IND2 BINOPEN BINCLOSE I O POS BINREMOTE OPEN BINOPEN BINCLOSE ALARM CB wear TCSSTATE BS ALARM TCS1 ALARM MCS 3I Uo Uo DC1 DC2 ES1 ES2 DC2 ES2 DC1 ES1 O I AR1 AR2 AR3 AR4 ARINH CBOPEN CBCLOSE ON RESET...

Page 35: ...Supervision function for energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase to earth voltage measurements Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric breaker wear of the c...

Page 36: ...ctional and non directional short circuit protection directional time overcurrent protection directional earth fault protection and automatic reclosing with synchro and voltage check functionality For more detailed information about the standard configuration refer to the application example of the standard configuration H01 on Section 11 1 Incoming feeder High H01 3I 67 I 0 67N 49F 3 3I 2f 68 I 4...

Page 37: ...1 OPEN OPENENA CLOSE CLOSEENA BINOPEN BINCLOSE OOPEN OCLOSE AOPEN ACLOSE 3I IL1 IL2 IL3 Io Io I O IND1 BINOPEN BINCLOSE I O IND2 BINOPEN BINCLOSE I O POS BINLOCAL BINREMOTE OPEN BINOPEN BIN CLOSE ALARM CB wear TCSSTATE BS ALARM TCS1 ALARM MCS 3I Uo Uo s 3U UL1 UL2 UL3 PQE f ALARM MCS 3U TRIGG RESET HAR_HIGH CUM_HIGH PQ 3Inf REX 521 CBFP Io BACTRL BS1 BS2 GROUP RESET START TRIP CBFP BACTRLB S1 BS2 ...

Page 38: ...gizing current input circuit Supervision function for energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase voltage measurements Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric b...

Page 39: ...ive directional and non directional short circuit protection directional and non directional time overcurrent protection directional earth fault protection and automatic reclosing For more detailed information about the standard configuration refer to the application example of the standard configuration H02 on Section 11 2 Incoming feeder High H02 3I 67 I0 67N 49F 3 3I2f 68 I 46 0 I 79 LO 86 CBFP...

Page 40: ...SET START TRIP CBFP Io CBFP CBFP BACTRL BS1 BS2 GROUP RESET START TRIP CBFP 3I CBFP BACTRL BS1 BS2 GROUP DOUBLE RESET BSOUT START TRIP CBFP 3I O I AR1 AR2 AR3 AR4 ARINH CBOPEN CBCLOSE ON RESET OPEN CLOSE DEFTRIP LOCKOUT 3I BS1 BS2 GROUP RESET CBFP START TRIP CBFP 3I CBFP BS1 BS2 GROUP DOUBLE RESET BSOUT START TRIP CBFP DREC IL1 IL2 IL3 Io Iob Uo U12 U23 U31 BI1 BI2 BI3 BI4 BI5 BI6 BI7 BI8 BI9 BI10...

Page 41: ...on for energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase voltage measurements 1 Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB Transie...

Page 42: ...ctive non directional short circuit protection non directional time overcurrent protection directional earth fault protection and automatic reclosing with synchro and voltage check functionality For more detailed information about the standard configuration refer to the application example of the standard configuration H03 on Section 11 3 Bus sectionalizer High H03 I 0 67N 49F 3 3I 2f 68 I 46 0 I ...

Page 43: ... O POS BINLOCAL BINREMOTE OPEN BINOPEN BINCLOSE ALARM CB wear ALARM TCS1 TCSSTATE BS ALARM MCS 3I TRIGG RESET HAR_HIGH CUM_HIGH PQ 3Inf Uo Uo REX 521 3I CBFP BS1 BS2 GROUP DOUBLE RESET BSOUT START TRIP CBFP CBFP Io BACTRL BS1 BS2 GROUP RESET START TRIP CBFP BACTRL BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP BACTRL BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP O I AR1 AR2 AR3 AR4 ARINH CBOPEN CBCLOSE...

Page 44: ...tion for energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase voltage measurements Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB Transie...

Page 45: ...ive non directional short circuit protection non directional time overcurrent protection directional and non directional earth fault protection and automatic reclosing For more detailed information about the standard configuration refer to the application example of the standard configuration H04 on Section 11 4 Outgoing feeder High H04 I0 67N 49F 3 3I2f 68 I 46 0 I 79 CBFP 62 LO 86 3I 50 51 I0 50...

Page 46: ...TRIP CBFP Io CBFP O I AR1 AR2 AR3 AR4 ARINH CBOPEN CBCLOSE ON RESET OPEN CLOSE DEFTRIP LOCKOUT 3U UL1_U12 UL2_U23 UL3_U31 PQE f TRIGG RESET HAR_HIGH CUM_HIGH PQ 3Unf ALARM MCS 3U Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP DREC IL1 IL2 IL3 Io Iob Uo U12 U23 U31 BI1 BI2 BI3 BI4 BI5 BI6 BI7 BI8 BI9 BI10 BI11 BI12...

Page 47: ...circuit Supervision function for energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase voltage measurements Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric breaker wear of the ci...

Page 48: ...ive non directional short circuit protection non directional time overcurrent protection non directional earth fault protection overvoltage protection undervoltage protection and residual overvoltage protection For more detailed information about the configuration refer to the application example of the standard configuration H05 on Section 11 5 Incoming feeder High H05 3U 27 3U 59 59N 3I 50 51 I ...

Page 49: ...RESET BSOUT START TRIP CBFP 3I CBFP BS1 BS2 GROUP DOUBLE RESET BSOUT START TRIP CBFP BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP Uo BS1 BS2 GROUP RESET START TRIP Uo BS1 BS2 GROUP RESET START TRIP Uo DREC IL1 IL2 IL3 Io Iob Uo U12 U23 BI1 BI2 BI3 BI4 BI5 BI6 BI7 BI8 BI9 BI10 B...

Page 50: ...ircuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase voltage measurements Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB Transient disturbance recorder Trip circui...

Page 51: ...irectional short circuit protection non directional time overcurrent protection overvoltage protection undervoltage protection residual overvoltage protection underfrequency protection and overfrequency protection For more detailed information about the standard configuration refer to the application example of the standard configuration H06 on Section 11 6 Measurement cubicle High H06 f f 81U 81O...

Page 52: ... TCSSTATE BS ALARM TCS1 ALARM MCS 3I Uo Uo REX 521 3U UL1_U12 UL2_U23 UL3_U31 PQE f ALARM MCS 3U TRIGG RESET HAR_HIGH CUM_HIGH PQ 3Inf TRIGG RESET HAR_HIGH CUM_HIGH PQ 3Unf 3I BS1 BS2 GROUP RESET CBFP START TRIP CBFP 3I CBFP BS1 BS2 GROUP DOUBLE RESET BSOUT START TRIP CBFP BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET STAR...

Page 53: ... Fuse failure protection Three phase non directional undercurrent protection with one stage Supervision function for energizing current input circuit Supervision function for energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase voltage measurements Residual voltage me...

Page 54: ... H07 configuration can also be applied to other objects needing thermal overload protection such as power transformers and it can also be used in applications requiring overcurrent protection under overvoltage protection and or directional or non directional earth fault protection For more information about the H07 standard configuration refer to application example on Section 11 7 Motor protectio...

Page 55: ...P DOUBLE RESET BSOUT START TRIP CBFP 3U UL1_U12 UL2_U23 UL3_U31 PQE f TRIGG RESET HAR_HIGH CUM_HIGH PQ 3Unf ALARM MCS 3U Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP DREC IL1 IL2 IL3 Io Iob Uo U12 U23 U31 BI1 BI2 BI3 BI4 BI5 BI6 BI7 BI8 BI9 BI10 BI11 BI12 BI13 BI14 BI15 BI16 EXT_TRG Start 3I Start 3I Start 3I Start Io Start Io Start Io Start Io Start 3Ith...

Page 56: ...n function for energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Neutral current measurement Three phase voltage measurements Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric breaker wear of the circuit breaker CB T...

Page 57: ...n directional short circuit protection non directional time overcurrent protection non directional earth fault protection overvoltage protection undervoltage protection and residual overvoltage protection For more detailed information about the configuration refer to the application example of the standard configuration H08 on Section 11 8 Incoming feeder High H08 H09 3U 27 3U 59 59N 3I 50 51 I 0 ...

Page 58: ...ART TRIP CBFP 3I CBFP BS1 BS2 GROUP DOUBLE RESET BSOUT START TRIP CBFP BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP 3U BS1 BS2 GROUP RESET START TRIP Uo BS1 BS2 GROUP RESET START TRIP Uo BS1 BS2 GROUP RESET START TRIP Uo DREC IL1 IL2 IL3 Io Iob Uo U12 U23 BI1 BI2 BI3 BI4 BI5 BI6 BI7 BI8 BI9 BI10 BI11 BI12 BI13 ...

Page 59: ...or energizing voltage input circuit Current waveform distortion measurement Voltage waveform distortion measurement Three phase current measurement Automatic reclosing 1 5 shots Neutral current measurement Three phase voltage measurements Residual voltage measurement System frequency measurement Three phase power and energy measurement Calculation of the accumulated electric breaker wear of the ci...

Page 60: ...ction non directional time overcurrent protection non directional earth fault protection overvoltage protection undervoltage protection residual overvoltage protection underfrequency protection and overfrequency protection For more detailed information about the configuration refer to the application example of the standard configuration H09 on Section 11 8 Incoming feeder High H08 H09 3U 27 3U 59...

Page 61: ...art 3U Start 3U Start 3U Start Uo Start Uo Start Uo f1 Start1 2 f2 Start1 2 Trip1 GROUP START 3I 2f I 1f 3dI dt 3I2f OPEN BINOPEN BINCLOSE ALARM CB wear O C E F O V U V RO V PQ 3Inf PQ 3Unf FREQ I O 3I 3I 3I Io Io Io 3U 3U 3U 3U Uo Uo Uo f1 Trip1 f1 Trip2 f2 Trip1 f2 Trip2 3I 3I 3I Io Io Io 3U 3U 3U 3U Uo Uo Uo f1 Trip1 f1 Trip2 f2 Trip1 f2 Trip2 3I 3I 3I Io Io Io 3U 3U 3U 3U Uo Uo Uo f1 Start1 f1...

Page 62: ...62 ...

Page 63: ...al routings Fig 4 1 Main principle of the overview diagrams of the signal routings 4 1 Digital inputs Digital inputs DI1 DI9 can be connected to the inputs of the function block in order to obtain different functionalities For example digital inputs are used for performing blocking of protection external triggering of disturbance recorder and local control Any of the digital inputs DI1 DI9 can be ...

Page 64: ...tal input DI1 DI9 can be routed to a specified input signal by the settings in the input signal menu Main menu Configuration Input Signals Only one digital input per input signal can be selected Refer to Chapter 5 Parametrization of the digital inputs Selector Selector Selector Selector DI1 SWGRP SWGRP SWGRP Reset EF Reset Iub Reset OC etc Input selectors Switchgroups Function blocks InputGen I I ...

Page 65: ...in Main menu Configuration Input SWGRP Fig 4 1 2 1 The input signal is routed with the switchgroup to one or several function block input s Note that the symbol O C overcurrent includes overcurrent function blocks I I and I The E F earth fault symbol includes all three earth fault function blocks Io Io and Io for example the Reset 1 signal resets all the three stages The symbols O C and E F are us...

Page 66: ...se DC pos open DC pos close ES pos open ES pos close Logic input 1 Logic input 2 Logic input 3 Lockout working CLOSEENA I O IND1 I O IND2 DC1 DC2 DC1 DC2 ES1 ES1 ES2 ES2 CBO CBO TCS BS SWGRP O C E F Iub 3Ith PQ 3Inf O C E F Iub 3Ith PQ 3Inf O C E F Iub 3Ith BS1 3I BS1 3I BS1 3I BS1 Io BS1 Io BS1 Io BS1 Iub BS2 3I BS2 3I BS2 3I BS2 Io BS2 Io BS2 Io BS2 Iub BS 3lth Io Io Io SWGRP Digital inputs The ...

Page 67: ...EX 521 and the RED 500 platform in the function block descriptions of the CD ROM 3I BS1 BS2 GROUP RESET CBFP START TRIP CBFP 3I CBFP BS1 BS2 GROUP DOUBLE RESET BSOUT START TRIP CBFP Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP Io CBFP BS1 BS2 GROUP RESET START TRIP CBFP GROUP START 3I2f I1f 3dI dt 3I2f BS1 BS2 GROUP RESET START TRIP CBFP Iub CBFP 3 I BLOC...

Page 68: ...put signals by using the output switchgroups for example Trip 2 see Fig 4 3 1 below Fig 4 3 1 Output switchgroups 4 3 1 Output selectors Output signals for example Start 1 Trip 1 are routed to the output relays for example PO1 HSPO1 SO1 by using output selectors Time characteristics Inputs Protection function name Outputs CBFP circuit breaker failure protection FBsymb 3I BS1 BS2 GROUP DOUBLE RESET...

Page 69: ...ion is to use the HSPO1 output to perform the lockout function The Lockout HSPO1 selector is used for activating the forced latching The latched output relay can only be reset via a digital input The idea is to have an external switch which needs to be reset before the CB close operation is allowed For example a motor feeder has tripped and it is necessary to avoid the re energising of the motor b...

Page 70: ...ates are restored to the state before the power failure and the output relay used for the lockout function is energized If the lockout function is used with the HSPO1 relay the control of the breaker could be possible when the auxiliary power of the protection relay is not connected To ensure maximum safety when using the lockout function it is recommended to use a battery unit as an auxiliary pow...

Page 71: ...X4 1 10 11 9 X4 2 3 4 1 2 OutputOverview Master trip Lockout reset External trip 1 Close RCLOSE CLOSE Lockout 3I 3I Alarm 2 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith I 0 CB1 open I 0 CB1 close 3lth 3I MCS TCS PQ 3Inf har PQ 3Inf cum CB wear I 0 CB1 open I 0 CB1 close 3lth 3I MCS ...

Page 72: ...72 ...

Page 73: ...tching between the setting groups 1 and 2 of the protection functions 5 1 3 Blocking Selectors BS1 and BS2 can be programmed to block the operation of the functions for example 3I 3I 3I etc 1 5 1 4 Disturbance recorder trigger Any of the inputs DI1 DI9 can be used to start the disturbance recorder to record measurements PREDELAY INVERSION DI1 DI9 Reset 1 Reset 2 Group Blocking 1 Blocking 2 DREC tr...

Page 74: ...eaker can be controlled via the binary inputs and the HMI but not through a communication port In remote position the circuit breaker can be controlled only through a communication port 5 1 10 Close enable DI1 DI9 can be used for giving the permission to close the circuit breaker For example SF6 gas low indication signal can be used to block the close operation of the CB The Close command can be a...

Page 75: ...e CLOSEENA input of the I O CB1 function block Different kinds of logics for permitting close operations can be built by using the interlocking logic described in Fig 5 2 1 and Fig 5 2 1 4 The logic states of an earth switch ES a disconnector DC and general digital inputs DI1 DI9 can be used together with the interlocking logic in Fig 5 2 1 Fig 5 2 1 Interlocking 5 2 1 Interlocking options The int...

Page 76: ... switch state Using disconnector state earth switch state not available If the status indication signals of the disconnector are connected to the digital inputs and routed to DC pos open and DC pos close these indications can be included in the interlocking scheme The signal marked Interlocking_A will be logical 1 when the disconnector is closed and logical 0 when the disconnector is open Use this...

Page 77: ...eated Examples DC or ES and Logic_inpX Interlocking_C DC and ES and Logic_inpX Interlocking_D Logic_inp1 and Logic_inp2 and Logic_inp3 Interlocking_E In addition to the ones mentioned here many different kinds of interlocking schemes can be built by using the selectors to connect digital inputs inversion to create AND OR logic and selecting different interlocking outputs A E See Fig 5 2 1 4 for a ...

Page 78: ...e becomes an OR function by inverting the digital inputs in the general digital input settings menu Thus any of the connected fault signals can disable closing of the circuit breaker DC pos close station L R switch in remote ES pos open Earth switch open Interlocking_D Close enable Logic input 1 SF6 gas alarm Interl5 Logic input 2 Spring not charged Logic input 3 Manual stop ...

Page 79: ... DI8 DI8 DI8 DI8 DI8 DI8 DI8 DI8 DI8 DI8 DI8 DI8 DI8 External trip NC NC NC NC NC NC NC NC NC NC NC NC NC Lockout reset NC NC NC NC NC NC NC NC NC NC NC NC NC Remote DI9 DI9 DI9 DI9 DI9 DI9 DI9 DI9 DI9 DI9 DI9 DI9 DI9 Close enable DI5 DI5 DI5 DI5 DI5 DI5 DI5 DI5 DI5 DI5 DI5 DI5 DI5 Open NC NC NC NC NC NC NC NC NC NC NC NC NC Close NC NC NC NC NC NC NC NC NC NC NC NC NC CB pos open DI1 DI1 DI1 DI1 ...

Page 80: ...09 Input Signals Input SWGRP Double NC NC NC NC NC NC NC Reset 1 OC OC OC OC OC OC OC OC OC Reset 2 EF EF EF DEF EF OV DEF EF EF Group OC EF Iub 3Ith OC EF Iub 3Ith OC EF Iub 3Ith OC EF Iub 3Ith OC EF OV UV OC OV UV ROV Freq OC EF Voltage f1 OC EF OV UV OC EF OV UV Blocking 1 BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 3I BS1 ...

Page 81: ...C O I f1 1 NC NC NC O I f1 2 NC NC NC O I f2 1 NC O I f2 2 NC O I External NC NC NC NC NC TCS1 Blocking NC NC NC NC NC NC NC NC NC Reset indication NC NC NC NC BACTRL NC NC NC NC NC Motor Status NC Restart Enable NC Table 6 4 Output SWGRP Basic and Medium HW versions Basic Medium Standard configuration B01 B02 M01 M02 Output SWGRP Output Signals Trip 1 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io ...

Page 82: ...Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith Start 2 NC NC NC NC BSOUT 3I 3I 3I 3I 3I 3I 3I 3I Alarm 1 O I CB1 open O I CB1 close 3Ith MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear O I CB1 open O I CB1 close 3Ith MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear O I CB1 open O I CB1 close 3Ith MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear O I CB1 open O I CB1 clo...

Page 83: ... Trip2 f2 Trip2 3I 3I 3I Io Io Io 3U 3U 3U 3U Uo Uo Uo 3Ihtdev Trip 1a 3I 3I 3I Io Io 3Ithdev Io Io 3I 3U 3U 3U 3U I2 I2 Is2t n 3I 3I 3I Io Io Io 3U 3U 3U 3U Uo Uo Uo f1 Trip1 f1 Trip2 f2 Trip1 Trip 1b 3I U1 U1U2 f1 Trip1 f1 Trip2 f2 Trip2 Trip 2 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I 3I Io Io Io Iub 3Ith f1 Trip1 f1 Trip2 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I f1 Trip1 f1 Trip2 3I ...

Page 84: ...Uo Uo f1 Trip1 f1 Trip2 f2 Trip1 Trip 3b 3I U1 U1U2 f1 Trip1 f1 Trip2 f2 Trip2 CBFP 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I 3I Io Io Io 3Ihtdev 3I 3I 3I 3I 3I Io Io 3Ithdev Io Io 3I I2 I2 3I 3I 3I Io Io Io 3Ihtdev 3I 3I 3I Io Io Io Start 1 3I 3I 3I Io Io Io Iub 3Ith 3I 3I 3I 3I Io Io Io Iub 3Ith f1 Start1 f1 Start2 3I ...

Page 85: ...cum I O CB1 open I O CB1 close MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear MCS 3U PQ 3Unf har PQ 3Unf cum I O CB1 open 1 O CB1 close MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear MCS 3U PQ 3Unf har PQ3Unf cum TIME1 FUSEF I O CB1 open I O CB1 close MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear MCS 3U PQ 3Unf har PQ 3Unf cum I O CB1 open I O CB1 close MCS 3I TCS1 PQ 3Inf har PQ 3Inf cum CB wear MCS 3U P...

Page 86: ...ual Standard Configurations REX 521 Table 6 6 Output signals HW versions Basic Medium High and Sensor Standard configuration B01 B02 M01 M02 H01 H02 H03 H04 H05 H06 H07 H08 H09 Output relays Output signals PO1 Trip 2 PO2 CBFP PO3 Close SO1 Start 1 SO2 Alarm 1 ...

Page 87: ...the function blocks can be found in Table 2 1 Note that in the CD ROM Technical Descriptions of Functions there are more signals presented than in this manual 7 1 Protection 7 1 1 3I 3I and 3I The three phase non directional overcurrent function blocks are designed for non directional two phase and three phase overcurrent and short circuit protection whenever the DT characteristic or as concerns 3...

Page 88: ... accuracy in DT mode Accuracy class index E in IDMT mode 2 5 of set value or 0 01 x In Injected currents 2 0 x start current internal time 32 ms total time 40 ms 40 1000 ms depends on the minimum pulse width set for the trip output 0 95 45 ms 2 of set value or 20 ms Class index E 5 0 or 20 ms Three phase non directional overcurrent protection 3I and instantaneous stage 3I Start current Operate tim...

Page 89: ...0 05 300 00 s 0 05 1 00 0 5 15 0 Not in use Definite time Extremely inverse Very inverse Normal inverse Long time inverse RI type inverse RD type inverse IEEE Ext inv IEEE Very inv IEEE Inverse IEEE S T inv IEEE S T E inv IEEE L T E inv IEEE L T V inv IEEE L T inv Peak to peak Fundamental frequency 0 1000 ms Note The values below apply when f fn 0 95 1 05 Operation accuracy Start time Reset time R...

Page 90: ...tage Io Start current Operate time Operation mode Measuring mode Drop off time of the operate time counter 0 10 12 00 x In 0 05 300 00 s Not in use Definite time Instantaneous Peak to peak Fundamental frequency 0 1000 ms Note The values below apply when f fn 0 95 1 05 Operation accuracy Operate time Reset time Reset ratio typically Retardation time Operate time accuracy in DT mode 2 5 of set value...

Page 91: ...time inverse Basic angle Uo Basic angle IoSin Cos Uo IoSin Cos Non directional Io Non directional Uo Forward Reverse 90 0 IoSin ϕ IoCos ϕ Not active Active Peak to peak Fundamental frequency 0 1000 ms Note The values below apply when f fn 0 95 1 05 Operation accuracy Start time Reset time Reset ratio typically Retardation time Operate time accuracy in DT mode Accuracy class index E in IDMT mode 2 ...

Page 92: ...neous Basic angle Uo Basic angle IoSin Cos Uo IoSin Cos Non directional Io Non directional Uo Forward Reverse 90 60 30 0 IoSin ϕ IoCos ϕ Not active Active Peak to peak Fundamental frequency 0 1000 ms Note The values below apply when f fn 0 95 1 05 Operation accuracy Start time Reset time Reset ratio typically Retardation time Operate time accuracy in DT mode 2 5 of set value 0 0005 x In 2 5 of set...

Page 93: ...Basic angle ϕb 0 90 Oper Direction Forward Reverse Earth fault pr Disabled Enabled Measuring mode Mode1 Phase to phase voltages Peak to peak currents Mode2 Phase to phase voltages Fund freq Currents Mode3 Phase to earth voltages Peak to peak currents Mode4 Phase to earth voltages Fund freq Currents Drop off time of the operate time counter 0 1000 ms Note The values below apply when f fn 0 95 1 05 ...

Page 94: ...Basic angle ϕb 0 90 Oper Direction Forward Reverse Earth fault pr Disabled Enabled Nondir operat Disabled Enabled Measuring mode Mode1 Phase to phase voltages Peak to peak currents Mode2 Phase to phase voltages Fund freq Currents Mode3 Phase to earth voltages Peak to peak currents Mode4 Phase to earth voltages Fund freq Currents Drop off time of the operate time counter 0 1000 ms Note The values b...

Page 95: ...22 MUM chapters 2 3 1 and 3 2 4 Retardation time 50 ms Operate time accuracy in DT mode 2 of set value or 20 ms Accuracy class index E in inverse time mode 20 ms or the accuracy appearing when the measured voltage varies 2 5 Three phase over voltage protection high set stage 3U Start voltage 0 10 1 60 x Un Operate time 0 05 300 00 s Operation mode Not in use Definite time Measuring mode Mode 1 Pha...

Page 96: ...1 0 Measuring mode Mode 1 Phase to phase voltages Peak to peak meas Mode 2 Phase to phase voltages Fundam freq Mode 3 Phase to earth voltages Fundam freq Note The values below apply when f fn 0 95 1 05 Operation accuracy 2 5 of the set value with Measuring Mode 3 1 0 of the set value with Measuring Modes 1 and 2 Start time Injected voltages 0 5 x start voltage internal time 32 ms total time 40 ms ...

Page 97: ...5 Operation accuracy 2 5 of the set value with Measuring Mode 3 1 0 of the set value with Measuring Modes 1 and 2 Start time Injected voltages 0 5 x start voltage internal time 32 ms total time 40 ms Reset time 40 1000 ms depends on the minimum pulse width set for the trip output Reset ratio typically 1 04 depends on the value of the Oper hysteresis parameter refer to the manual of the Three phase...

Page 98: ...ad lines Fig 7 1 9 1 Function block symbol of 3Ith Phase discontinuity protection Iub Start unbalance Operate time Operation mode 10 0 95 0 1 0 300 0 s Not in use Definite time Operation accuracy Start time Reset time Reset ratio typically Retardation time Operate time accuracy in DT mode Note The values below apply when f fn 0 95 1 05 2 5 of set value or 1 unit internal time 95 ms total time 100 ...

Page 99: ...desired type and duration such as one high speed and one delayed auto reclosure When the reclosing is initiated by the start of a protection function the auto reclose function is capable of executing the final trip of the circuit breaker in a short operate time in case the fault still persists when the last reclosure selected has been carried out Fig 7 1 10 1 Function block symbol of O I Three pha...

Page 100: ...the control COCB function See Fig 7 1 10 2 Note that the open and the trip signal always overrides the reclose and the close signal Sometimes it can be useful to get indications on the display cleared after a successful auto reclosing This can be done by selecting O I in input SWGRP Reset indication By default this option is disabled Auto reclosure function O I Number of reclosures Initiation mode...

Page 101: ...rm 2 O I 3I Start O I 3I Start O I 3I Start Ext start O I Trip 3I O I Trip 3I O I Trip 3I Ext trip ARINH ARON CBOPEN CBCLOSE RESET SHOT1 SHOT2 SHOT3 SHOT4 SHOT5 TRDUE TDDUE ACTIVE AR1TRIP AR2TRIP AR3TRIP AR4TRIP CBFAIL DEFTRIP LOCKOUT SHOT_ALARM AR1TRIP AR2TRIP AR3TRIP AR4TRIP CBFAIL DEFTRIP LOCKOUT SHOT_ALARM DI1 DI9 DI1 DI9 CB pos open CB pos close Reset Autorclose Input SWGRP Output SWGRP Initi...

Page 102: ...nd instantaneous stage Uo Continued System frequency protection f1 and f2 Voltage limit 0 30 0 90 x Un Start frequency 25 00 75 00 Hz Operate time 1 0 10 120 00 s Start df dt 0 2 10 0 Hz s Operate time 2 0 12 120 00 s Operation mode Not in use f f 1 timer f f 2 timers f f OR df dt f f AND df dt f f OR df dt f f AND df dt Accuracy for the f f function is defined in the setting range 25 75 Hz Operat...

Page 103: ...age combine must be enabled and in transformer standard configuration H03 it must be disabled The parameter is by default in the correct mode Synchro check SYNC1 Umax Upper threshold voltage 0 50 1 00 x Un Umin Lower threshold voltage 0 10 0 80 x Un dU Voltage difference 0 02 0 60 x Un dphase Phase angle difference 5 90 df Frequency difference 0 02 5 00 Hz Energizing mode Not in use U1 U2 U2 U1 U1...

Page 104: ... 0 500 0 s Countdown rate 2 0 250 0 s h Stall time 2 0 120 0 s Note The values below apply when f fn 0 95 1 05 Operation accuracies Current measurement 2 5 of set value or 0 01 x In Stall time accuracy 2 of set value or 20 ms f fn 0 95 1 50 Internal time 22 ms Total time 30 ms 1 f fn 0 50 0 95 Internal time 32 ms Total time 40 ms1 Start time f fn 0 95 1 50 Internal time 22 ms Total time 30 ms1 f f...

Page 105: ... 0 95 1 05 Operation accuracies Phase angle difference 2 Current 0 01 x In Start time Start time when phase order is wrong and the injected currents 1 0 In Internal time 72 ms Total time 80 ms 1 Reset time 40 1000 ms depending on the minimum pulse width set for TRIP output Reset ratio Reset value for phase angle difference 3 Retardation time Total retardation time when correct phase order is resto...

Page 106: ...ay 0 1 60 0 s Minimum time 0 1 120 0 s Maximum time 500 10000 s Cooling time 5 10000 s Number of phases 2 3 Note The values below apply when f fn 0 95 1 05 Operation accuracies 2 5 of set value or 0 01 x In Start time Injected negative sequence current 2 00 x start value internal time 32 ms total time 40 ms 1 Reset time 40 1000 ms depending on the minimum pulse width set for TRIP output Reset rati...

Page 107: ...ction 3I Operation mode Not in use Alarm Trip Operation criteria 1 2 3 phase 3 phase Start current 0 10 0 99 x In Operate time 0 1 600 0 s Internal blocking Disabled Enabled Blocking time 0 7200 s Measuring mode Peak to peak Fundamental frequency Drop off time 0 00 60 00 s Note The values below apply when f fn 0 95 1 05 Operation accuracies 2 5 of set value or 0 01 x In Start time Injected current...

Page 108: ...Fail an additional delay has to be included in the block activation time 2 When BSOUT output is used for blocking function blocks that are executed in a slower task interval than FuseFail an additional delay has to be included in the reset time Fuse failure supervision Ratio U2 U1 10 50 Ratio I2 I1 10 50 FuseFail Not in use In use Operation accuracies Depends on the frequency of the current and vo...

Page 109: ...ort time and long time overloadings Fig 7 1 19 1 Function block symbol of 3Ithdev Three phase thermal overload protection for devices 3Ithdev Short time constant for stator 0 1 999 0 min Long time constant for stator 0 1 999 0 min Weighting factor of stator s short time constant 0 00 1 00 Temperature rise when In for stator 50 0 350 0 C Maximum temperature for stator 50 0 350 0 C Short time consta...

Page 110: ...e function U2 is designed to be used to protect motors against failure on one or more phases single phasing to protect against excessive imbalance between phases and to protect machines against reversal of phase sequence both in forward and reverse rotation direction A faulty voltage transformer or sensor as well as a wrong connection of voltage measuring devices causes apparent voltage unbalance ...

Page 111: ...te time U1 0 04 60 00 s Note The values below apply when f fn 0 95 1 05 Operation accuracies 2 5 of set value or 0 01 x Un Start time U2 operation Injected negative sequence voltage 1 1 x start value internal time 42 ms total time 50 ms Start time U1 operation Injected positive sequence voltage 0 50 x start value internal time 32 ms total time 40 ms Start time U1 operation Injected positive sequen...

Page 112: ... H07 7 2 5 ALARM1 8 The alarm indicating functions ALARM1 8 are used for controlling alarm LEDs The configuration specific signals to which the alarm indicating functions can be connected are the following I O POS BINREMOTE Table 7 2 5 1 Basic B01 LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED8 3I Start 3I Trip 3I Start 3I Trip 3I Start 3I Trip Io Start Io Trip Io Start Io Trip Io Start Io Trip Iub Start ...

Page 113: ...rip Io Start Io Trip Io Start Io Trip Iub Start Iub Trip 3Ith Start 3Ith Trip O I OPEN O I ACTIVE O I ALAR1 O I ALAR2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 MEAS HI ALARM DI2 DI3 DI4 DI5 DI6 DI7 Interlocking MEAS LO ALARM MEAS HI ALARM DI3 DI4 DI5 DI6 DI7 Lockout CB Wear TCS1 MCS 3I MCS 3U DI5 DI6 DI7 DI8 Table 7 2 5 6 High Sensor H02 LED1 LED2 LED3 LED4 LED5 LED6 LED7 LED...

Page 114: ...Uo Start Uo Trip Uo Start Uo Trip Uo Start Uo Trip f1 Start 1 f1 Trip 1 f1 Start 2 f1 Trip 2 f2 Start 1 f2 Trip 1 f2 Start 2 f2 Trip 2 3I Start 3I Trip 3I Start 3I Trip DI1 DI2 DI3 DI4 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 MEAS HI ALARM DI2 DI3 DI4 DI5 DI6 DI7 Interlocking MEAS LO ALARM MEAS HI ALARM DI3 DI4 DI5 DI6 DI7 Lockout CB Wear TCS1 MCS 3I MCS 3U DI5 DI6 DI7 DI8 Table 7 2 5 11 High Sensor H07 LE...

Page 115: ...Trip Io Start Io Trip Io Start Io Trip Io Start Io Trip 3U Start 3U Trip 3U Start 3U Trip 3U Start 3U Trip 3U Start 3U Trip Uo Start Uo Trip Uo Start Uo Trip Uo Start Uo Trip f1 Start1 2 DI2 DI1 DI2 DI3 DI4 DI5 DI6 f1 Trip1 2 DI8 MEAS HI ALARM DI2 f2 Start1 2 DI4 DI5 DI6 DI7 Interlocking MEAS LO ALARM MEAS HI ALARM f1 Trip1 2 DI4 DI5 DI6 DI7 Lockout CB Wear TCS1 MCS 3I MCS 3U O I OPEN O I ACTIVE O...

Page 116: ...e for the true RMS calculation is one fundamental cycle Fig 7 3 3 1 Function block symbol of Uo 7 3 4 DREC The transient disturbance recorder DREC is used for recording current waveforms and when available voltage waveforms Furthermore start and trip signals from the protection functions are recorded The amount of recorded signals is standard configuration specific refer to the block diagram of th...

Page 117: ...rameter or using a periodic triggering Notice that the recordings will be cleared if setting some of the parameters which cause the device to reset Refer to Technical Reference Manual General chapter Relay Setting Tool view see Section 1 5 Related documents Fig 7 3 4 1 Function block symbol of DREC DREC IL1 IL2 IL3 Io Iob BI1 BI2 BI3 BI4 BI5 BI6 BI7 BI8 BI9 BI10 BI11 BI12 BI13 BI14 BI15 BI16 EXT_T...

Page 118: ...inputs triggering on undercurrent undervoltage triggering via serial communication or a parameter periodic triggering The recording length depends on the number of recordings and inputs used For example the following combination of recording length number of recordings and number of inputs is available at 50 Hz in parentheses the total recording time at 60 Hz recordings inputs 1 2 3 4 5 6 7 1 1066...

Page 119: ...I Start 3I Start 3I Start 3I Start 3I Start 3I Start 3U Start 3I Start 3I BI4 Start Io Start Io Start Io Start 3I Start Io Start Io Start Io Start 3U Start Io Start Io BI5 Start Io Start Io Start Io Start Io Start Io Start Io Start Io Start 3U Start Io Start Io BI6 Start Io Start Io Start Io Start Io Start Io Start Io Start Io Start 3U Start Io Start Io BI7 Start Iub Start Iub Start Iub Start Io S...

Page 120: ...3 UL3_U31 UL1_U12 UL2_U23 UL3_U31 UL1_U12 average UL2_U23 average UL3_U31 average UL1_U12 average UL2_U23 average UL3_U31 average 0 00 999 99 kV 0 00 999 99 kV 0 00 999 99 kV 0 00 2 00 x Un 0 00 2 00 x Un 0 00 2 00 x Un 0 00 999 99 kV 0 00 999 99 kV 0 00 999 99 kV 0 00 2 00 x Un 0 00 2 00 x Un 0 00 2 00 x Un Three phase voltage measurement 3U_B UL1_U12 UL2_U23 UL3_U31 UL1_U12 UL2_U23 UL3_U31 UL1_U...

Page 121: ... and energy Fig 7 3 8 1 Function block symbol of PQE System frequency measurement f Frequency 10 00 75 00 Hz Average Freq 10 00 75 00 Hz Voltage U 0 0 2 0 x Un MEFR1 f Three phase power and energy measurement PQE P3 kW 999999 999999 kW Q3 kVAr 999999 999999 kVAr Power factor DPF 1 00 1 00 Power factor PF 1 00 1 00 P3 demand kW 999999 999999 kW Q3 demand kVAr 999999 999999 kVAr Energy kWh 0 9999999...

Page 122: ...ear has reached the setting value the function block will issue an alarm signal The function block uses a 16 point setting table Main menu Cond Monit CB wear Control settings for the current and the corresponding breaker wear value The calculation is based on linear interpolation using the table Typically the breaker wear increases in proportion to the square of the current However the interpolati...

Page 123: ...ts exceed the setting High limit while the measured phase current in the remaining one or two phases is below the setting Low limit the output ALARM is activated after the adjustable alarm delay The function block is disabled if all input currents are below the setting Low limit The ALARM output will reset automatically when the fault disappears The phase current supervision function block operate...

Page 124: ...H07 Fig 7 4 5 1 Function block symbol of TIME1 7 5 Power quality 7 5 1 PQ 3Inf The function block PQ 3Inf for current waveform distortion measurement is used for measuring the harmonics and monitoring the power quality in distribution networks Although the European Standard EN 50160 concerns voltage distortion the same standard is applied to current distortion measurements in PQ 3Inf Measuring pri...

Page 125: ...hase current or most distorted phase current can be tracked Measuring modes Measurement activation Triggering mode Distortion factor Not in use L1 L2 L3 Worst phase Triggering by setting parameter binary input date time setting Single Continuous Periodic THD TDD Monitored values THD 3 sec and 10 min mean values Harmonic components from 1st to 13th 3 sec mean values Harmonic components from 2nd to ...

Page 126: ...ate time setting Triggering mode Single Continuous Periodic Monitored values THD 3 sec and 10 min mean values Harmonic components from 1st to 13th 3 sec mean values Harmonic components from 2nd to 13th 10 min mean values 0 0 120 0 0 0 120 0 Un 0 0 120 0 Un Statistics Observation times for statistics 1 hour 12 hours 1 day 2 days 3 days 4 days 5 days 6 days 1 week Percentile setting 90 0 99 5 Percen...

Page 127: ...anging the functionality of the standard configuration via the HMI or using the Relay Setting Tool 7 6 2 Selectors The selectors are used for routing signals and connecting inputs Every digital input can be connected to an input signal for example Blocking 1 Master trip via a selector Likewise an output signal can be connected to an output relay Trip1 Alarm 1 via a selector ...

Page 128: ...128 ...

Page 129: ...like below Fig 8 1 Typical HV MV substation 1 49F 3 3I 50 51 I 0 50N 51N I 46 CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 3I 50 51 I 0 50N 51N CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 CBFP 62 3I 50 51 3I 2f 68 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 Station 49F 3 3I 50 51 I 0 50N 51N I 46 CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B02 0 I 79 ...

Page 130: ... 2 Typical HV MV substation 2 CBFP 62 3I harm 3I 50 51 U 0 59N 67N TCS CBCM 3I U0 0 I MCS 000 R REX 521 M01 49F 3 I 46 CBFP 62 3I 50 51 I 0 67N 0 I 79 3I harm TCS CBCM 0 I MCS 000 R 3I I0 U0 REX 521 M02 49F 3 I 46 CBFP 62 3I harm 3I 50 51 I 0 67N TCS CBCM 3I I0 U0 0 I MCS 000 R REX 521 M01 St at i on3 ...

Page 131: ... 79 3I 50 51 I 0 50N 51N CBFP 62 I 0 67N Outgoing feeder High H04 3I 50 51 CBFP 62 Bus sectionalizer H03 REX 521 H03 3I 2f 68 SYNC 25 REX 521 H02 Incoming feeder High H02 3I 67 CBFP 62 3I 50 51 Measurement cubicle High H06 REX 521 H06 f 81U 3U 27 3U 59 59N U 0 REX 521 H04 49F 3 I 46 0 I 79 3I 50 51 I 0 50N 51N CBFP 62 I 0 67N Outgoing feeder High H04 REX 521 H02 Incoming feeder High H02 3I 67 CBFP...

Page 132: ...132 ...

Page 133: ...ection Thermal overload protection for cable line The network is either resistance or solidly earthed The three phase current measurement is established with a set of current transformers The neutral current is measured in a residual connection Fig 9 1 1 1 B01 is used for protection measuring and supervision on an outgoing feeder in a single busbar system The supplying network is either solidly or...

Page 134: ...verview diagram of the outgoing feeder REX 521 CB DC ES 1 0 0 1 Breaker wear alarm Circuit breaker failure protection Blocking signal to the incoming feeder START 3I TRIP circuit breaker CLOSE circuit breaker Blocking signal from the residual voltage relay to the Io Internal relay fault OverviewOutg Power flow direction ...

Page 135: ...Setting Tool or the local HMI The settings can be found in Main menu Protection 9 1 3 1 Phase overcurrent protection The phase overcurrent protection includes three stages By using all the three stages and giving each overcurrent stage its own start value and operate time good selectivity with short operate times can be obtained Normally a two stage overcurrent protection is sufficient However whe...

Page 136: ...nd the values of the most recent operation can be found in Main menu Protection 3I 3I Recorded data1 3 9 1 3 2 Earth fault protection The neutral current can be measured either via a set of three phase current transformers in a residual connection like in this example or via a core balance current transformer The residual connection can be used in the cases of high earth fault currents and moderat...

Page 137: ...ase wires Another example of a phase discontinuity fault is a line breakdown and a one phase earth fault on the load side Note that a fault in the end of a long feeder behind several loads may result in a very low unbalance and thus the phase discontinuity protection may not operate The unbalance of the network is detected by monitoring the highest ILmax and the lowest ILmin phase currents The unb...

Page 138: ...it remains the same the cable temperature will reach the maximum temperature set for the cable After the thermal overload protection has tripped reclosing is not possible until the calculated conductor temperature falls below the value set for the Reclosure temp parameter because the function block holds the trip output active If the re closing inhibit is chosen not to be used the parameter is set...

Page 139: ...n function trip signal can be connected or disconnected When the two stage overcurrent 3I and 3I two stage earth fault Io and Io the unbalance and thermal overload protection are selected the checksum for the Trip 1 is 221 Using Relay Setting Tool To change the settings for the Trip 1 go to the Configuration in config view and Output SWGRP and select the New value on Trip 1 Press backspace to chan...

Page 140: ...fer to Tools for Relays and Terminals User s Guide see Section 1 5 Related documents Fig 9 1 4 1 2 Setting Trip 1 signal in the Graphical I O Setting Tool 9 1 4 2 Indication and control connections The output signals can be routed to any of the output relays and in this example the circuit breaker close signal is connected to the power output 3 PO3 X4 1 17 18 The status indications from the circui...

Page 141: ... or navigation push button Select DI1 and press the E button to confirm Scroll to the CB pos close and select the DI2 input Using Relay Setting Tool To change the settings for the CB pos open go to the Configuration Input Signals and find CB pos open Select DI1 in the pull down menu For more information refer to Tools for Relays and Terminals User s Guide see Section 1 5 Related documents Fig 9 1 ...

Page 142: ...ut signal no close pulse will be sent from the relay The open and close input signals have to be selected via the Configuration Input Signals menu in the same way as for the breaker status indication signals Fig 9 1 4 2 2 Connection diagram for the standard configuration B01 with the breaker status indication and the control signals for opening and closing of the circuit breaker 9 1 5 Implementati...

Page 143: ...nverse Definite Time timer and the BS2 will block the trip signal Refer to the CD ROM Technical Descriptions of Functions see Section 1 5 Related documents for more information In this application example the digital input DI9 is connected to the input signal Blocking 1 and then routed to the BS1 input of the earth fault stage Io The Blocking 1 signal can be found in Main menu Configuration Input ...

Page 144: ...Main menu Configuration Input SWGRP TCS1 The default setting of the parameter is Not in use Another solution is to use an external resistor to prevent the TCS1 alarm Refer to Technical Reference Manual General see Section 1 5 Related documents for more information about the trip circuit supervision 9 1 5 5 Condition monitoring of the breaker wear Calculating the electrical wear of the circuit brea...

Page 145: ...in Main menu Configuration Input Signals The status indication signals for the disconnector are named as DC pos open and DC pos close and for the earth switch as ES pos open and ES pos close In this example the disconnector indication signals are connected to the inputs DI3 open and DI4 close The earth switch indication is connected to the inputs DI5 open and DI6 close With these indication signal...

Page 146: ... Overcurrent protection Non directional earth fault protection The network is resistance or solidly earthed The three phase current measurement is established with current transformers The neutral current is measured via a current transformer located in the neutral earthing circuit on the LV side of the power transformer CB REX521 DC ES 1 0 0 1 Blocking signal from the residual voltage relay to Io...

Page 147: ...ision on both an incoming and an outgoing feeder in a single busbar system The supplying network is either solidly or resistance earthed UserIncF 49F 3 3I 50 51 I 0 50N 51N I 46 CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 3I 50 51 I 0 50N 51N CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 Application Example 1 Application Example 2 ...

Page 148: ...verview diagram of the incoming feeder CB DC REX521 CLOSE circuit breaker 1 0 0 1 OverviewInc Circuit breaker failure protection TRIP circuit breaker Internal relay fault Io TRIP to breaker on HV side of transformer OC blocking signal from the outgoing feeders to the 3I stage OC blocking signal to the HV relay 3I START ...

Page 149: ...and as back up protection of the outgoing feeders The technical data of the current transformers are set via the Relay Setting Tool or the local HMI The settings can be found in Main menu Configuration Meas devices Refer to Technical Reference Manual General see Section 1 5 Related documents for further information about how to set the rated currents 9 2 3 Protection All the necessary settings for...

Page 150: ...n and the co operation of the relays between the different protection levels can be arranged in many ways and they vary in different applications A few examples of how the described application can be changed using some of the features of REX 521 are described below The back up protection can be made with the circuit breaker failure protection function of the protection relay of the outgoing feede...

Page 151: ... be set In Main menu Protection 3I Control setting can for example the Drop off time and the length of the trip signal Trip pulse be set The data of the three last operations start or trip are recorded and the values of the most recent operation can be found in Main menu Protection 3I Recorded data1 3 9 2 3 2 Earth fault protection The earth fault stages can be used in different ways depending on ...

Page 152: ...ation examples for the standard configuration B01 are presented 9 2 4 1 Blocking signal received from the outgoing feeder The start signals from the overcurrent protection of the outgoing feeder can be connected in order to block the overcurrent protection stages on the incoming feeder There are two input blocking signals Blocking 1 and Blocking 2 which can have different functions depending on th...

Page 153: ...m in this application example for Trip 2 is 32 9 2 4 4 Circuit breaker failure protection All of the protection functions in the standard configuration B01 provide a delayed trip signal CBFP after the trip signal unless the fault has not disappeared during the set CBFP time delay In the circuit breaker failure protection the CBFP output can be used for operating an upstream circuit breaker The set...

Page 154: ... in Main menu Power Quality PQ 3Inf The function is used for measuring the harmonics and monitoring the power quality in distribution networks The power quality function can be triggered by any of the alternatives listed below Manual triggering via the HMI With the external input signal Triggering via communication parameter Preset time and date External triggering can be made by means of the rese...

Page 155: ... example describes a transformer feeder including Overcurrent protection Inrush protection The application described in this example can serve as a backup protection for a differential protection of the transformer or as main protection for smaller transformers CB REX 521 OC blocking signal from outgoing feeders to 3I stage Circuit breaker failure protection Io TRIP to breaker on HV side of transf...

Page 156: ... incoming and a transformer feeder in a single busbar system 49F 3 3I 50 51 I 0 50N 51N I 46 CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 3I 50 51 I 0 50N 51N CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 CBFP 62 3I 50 51 3I 2f 68 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B01 UserTransF Application Example 1 Application Example 2 Application Example 3 ...

Page 157: ...tandard Configurations Fig 9 3 1 2 Connection overview diagram of the incoming feeder REX 521 CB DC 1 0 0 1 OverviewTrans Circuit breaker failure protection TRIP circuit breaker CLOSE circuit breaker Internal relay fault OC blocking signal from the MV relay to the 3I stage ...

Page 158: ...documents for further information about how to set the rated currents 9 3 3 Protection All the necessary settings for the protection functions can be set via the Relay Setting Tool or the local HMI The settings can be found in Main menu Protection 9 3 3 1 Phase overcurrent protection The overcurrent protection includes three stages The relay measures the phase currents on the HV side The definite ...

Page 159: ...is used for doubling the set start current of overcurrent protection in a transformer magnetizing inrush situation or at motor start up The operation of the overcurrent stages 3I and 3I can be inhibited by the inrush function Transformer magnetizing inrush currents occur when energizing the transformer The inrush current may be many times the rated current and the halving time may be up to several...

Page 160: ... it is possible to scroll between the different protections By pressing the or navigation push button the specific protection function trip signal can be connected or disconnected When the three stage overcurrent 3I 3I and 3I is selected the checksum for Trip 1 is 7 9 3 3 4 Indication and control connections All the necessary settings for the indication and the control signals of the circuit break...

Page 161: ...otection All of the protection functions in the standard configuration B01 provide a delayed trip signal CBFP after the trip signal unless the fault has not disappeared during the set CBFP time delay In the circuit breaker failure protection the CBFP output can be used for operating an upstream circuit breaker The settings for breaker failure are set separately for each protection function For exa...

Page 162: ... 5 Blocking signal overview To clarify the blockings between the different levels in the first three application examples Section 9 1 Outgoing feeder Basic B01 Section 9 2 Incoming feeder Basic B01 and Section 9 3 Transformer feeder Basic B01 the signals are presented in the figure below CB REX 521 Circuit breaker failure protection TRIP circuit breaker CLOSE circuit breaker DC 1 0 0 1 OC blocking...

Page 163: ...a single busbar including Auto reclosure function Overcurrent protection Non directional earth fault protection Phase discontinuity protection Thermal overload protection for cable line The network is either resistance or solidly earthed Three phase current measurement is established with a set of current transformers and the neutral current is measured in a residual connection 3I 3I 3I 3I 3I 3I 3...

Page 164: ...9 4 1 1 B02 is used for protection measuring and supervision on an outgoing feeder in a single busbar system The supplying network is either solidly or resistance earthed 49F 3 3I 50 51 I 0 50N 51N I 46 CBFP 62 TCS CBCM 3I I0 0 I MCS 3I harm 000 R REX 521 B02 0 I 79 UserOutgB02 Application Example 4 ...

Page 165: ...diagram of the outgoing feeder REX 521 CB DC ES 0 1 Circuit breaker failure protection Blocking signal to incoming feeder START 3I TRIP circuit breaker CLOSE circuit breaker Blocking signal from the residual voltage relay to the Io Internal relay fault External reclosure initialization signal Definite trip alarm OverviewOutgB02 ...

Page 166: ...Tool or the local HMI The settings can be found in Main menu Configuration Meas devices Refer to REX 521 Technical Reference Manual General see Section 1 5 Related documents for further information about how to set the rated currents 9 4 3 Protection All the necessary settings for the protection functions can be set via the Relay Setting Tool or the local HMI The settings can be found in Main menu...

Page 167: ...the final trip time Therefore the protection operates as a back up for the auto reclose function if the tripping carried out by the auto reclose function fails Fig 9 4 3 1 1 Auto reclose sequence when AR is initiated by the start signal An auto reclose sequence can also be initiated by the trip signal of a protection function see Fig 9 4 3 1 2 The trip signal from the protection trips the breaker ...

Page 168: ...n choose O I 3I Press E push button and scroll the different initiation signal methods with the and navigation push buttons The specific initiation method can be enabled or disabled with the and push buttons The checksum will be 1 if 3I Start AR1 is set and 2 if 3I Trip AR1 is set After the initiation method is chosen the settings for the auto reclosure function has to be made In Main menu Protect...

Page 169: ...e available as three different signals from the auto recloser The signals can be found in Main menu Configuration Output SWGRP and are named as O I ACTIVE O I Alarm 1 and O I Alarm 2 Refer to the CD ROM Technical Descriptions of Functions for more information about the auto reclosing function 9 4 4 Protection signal routing The settings for the protection signal routing can be implemented as descr...

Page 170: ...circuit breaker 9 4 6 Implementations In the section below a few implementation examples for the standard configuration B02 are presented 9 4 6 1 Definite Trip alarm to output relay To get the DEFTRIP signal to activate an output contact go to Main menu Configuration Output SWGRP O I Alarm 1 press the E button and scroll to DEFTRIP and take it in to use with the help of the and CB REX 521 TRIP cir...

Page 171: ...Signals Further in Main menu Configuration Input SWGRP the external initiation signal is named as O I External The initiation method is chosen and in this example Trip AR1 or Start AR1 can be used depending on the signal available and the methods parametrized within the auto recloser function The rest of the settings are made in the settings for the auto recloser in the same way as mentioned above...

Page 172: ...172 ...

Page 173: ...work is compensated earthed or isolated Three phase current measurement is established with a set of current transformers and the neutral current is measured with a cable transformer The residual voltage is measured with a set of voltage transformers in an open delta connection Fig 10 1 1 1 REX 521 M01 used for protection measuring and supervision on an outgoing feeder in a single busbar system Th...

Page 174: ...m of the outgoing feeder REX 521 CB DC ES 0 1 5 0 2 v 100V Uo b da dn A N Overcurrent TRIP Alarm Circuit breaker failure protection Blocking signal to incoming feeder START 3I TRIP circuit breaker CLOSE circuit breaker Internal relay fault Earth fault TRIP Alarm Control signal for selecting the basic angle of Io BACTRL OverviewOutgM01 ...

Page 175: ...the voltage transformer are set via the Relay Setting Tool or the local HMI The settings can be found in Main menu Configuration Meas devices Refer to REX 521 Technical Reference Manual General see Section 1 5 Related documents for further information about how to set the rated currents and voltage 10 1 3 Protection All the necessary settings for the protection functions can be set via the Relay S...

Page 176: ...0 When an isolated neutral system is protected the basic angle is set to 90 It is also possible to use an external control signal BACTRL for selecting the basic angle 0 90 to be automatically determined by the earthing situation of the network The operation direction forward or reverse can be individually selected for the three stages The start value of the low stage Io of the earth fault protecti...

Page 177: ...es for the standard configuration M01 are presented 10 1 4 1 Basic angle control by digital input If an external control signal determined from the earthing situation of the network is available it can be used for changing the settings for the basic angle of the directional earth fault protection The angle can be switched in between 0 and 90 The usage of basic angle control is useful as compensate...

Page 178: ...checksum in this application example for Start 1 is 2 10 1 4 3 Trip alarm signals from overcurrent and earth fault The trip signals from any protection function can be routed to an output relay in order to provide an alarm signal to indicate which protection has tripped To use the trip signal from a protection function the signal has to be routed via Main menu Configuration Output SWGRP Trip 2 or ...

Page 179: ... If the resistance of the trip circuit exceeds a certain limit for instance due to a bad contact or oxidation the supervision function will be activated and a trip circuit supervision alarm signal is provided after an adjustable delay time The settings for the function can be found in Main menu Cond monit TCS1 To avoid unnecessary alarms the trip circuit supervision can be blocked by the BS signal...

Page 180: ...cluding Overcurrent protection Residual voltage protection The network is either compensated earthed or isolated The three phase current measurement is established with current transformers and the residual voltage is measured with a set of voltage transformers in an open delta connection CB REX 521 Circuit breaker failure protection Blocking signal to incoming feeder START 3I TRIP circuit breaker...

Page 181: ...g 10 2 1 1 REX 521 M01 used for protection measuring and supervision on an incoming feeder in a single busbar system The system earthing on the supplying network is compensated or isolated CBFP 62 3I harm 3I 50 51 U 0 59N 67N TCS CBCM 3I U0 0 I MCS 000 R REX 521 M01 UserIncM01 Application Example 6 ...

Page 182: ... DC REX 521 1 0 0 1 5 0 2 v 100V Uo b A N da dn OverviewIncM01 Circuit breaker failure protection TRIP circuit breaker CLOSE circuit breaker Internal relay fault OC blocking signal to the HV relay 3I START OC blocking signal from the outgoing feeders to the 3I stage Second settings Uo TRIP to the outgoing feeders Uo Start to release blocking of outgoing feeders ...

Page 183: ... V and 120 V Fig 10 2 2 1 Connection diagram for the standard configuration M01 for protection of an incoming feeder and as back up protection of the outgoing feeders The technical data of the current transformers and the voltage transformer are set via the Relay Setting Tool or the local HMI The settings can be found in Main menu Configuration Meas devices Refer to REX 521 Technical Reference Man...

Page 184: ...the busbar system and for the back up protection of the network The low stage can be given a sensitive setting and have an alarming function Note that in this application example the CBFP signal has to be taken out of use for this stage With the default settings the CBFP is in use The high stage can work as back up for the network and perform trip on the outgoing feeders Further the start signal f...

Page 185: ... in Main menu Configuration Output Signals In this example the directional earth fault stage Io is configured as a Uo protection and the start signal is routed via Start 1 and then connected to the signal output 2 SO2 The checksum in this application example for Start 1 is 16 10 2 5 2 Blocking signal received from the outgoing feeder The start signals from the overcurrent protection of the outgoin...

Page 186: ...relay has to be selected in Main menu Configuration Output Signals In this example the directional earth fault stage Io is configured as a Uo protection and is routed via Trip 2 and then connected to the power output 2 PO2 The checksum in this application example for Trip 2 is16 Note also that the events for example start and trip for the residual overvoltage protection will be sent from the direc...

Page 187: ...ection are selected the checksum for CBFP will be 221 The CBFP signal is then connected to any of the output relays via Main menu Configuration Output Signals and in this example the circuit breaker failure signal is connected to the power output 1 PO1 10 2 5 7 Trip circuit supervision The trip circuit supervision is available for the HSPO1 relay If the resistance of the trip circuit exceeds a cer...

Page 188: ...continuity protection Thermal overload protection for cable line The network is either compensated or isolated Three phase current measurement is established with a set of current transformers and the neutral current is measured with a cable transformer The residual voltage is measured with a set of voltage transformers in an open delta connection CB REX521 OC blocking signal from outgoing feeders...

Page 189: ... 10 3 1 1 REX 521 M02 used for protection measuring and supervision on an outgoing feeder in a single busbar system The supplying network is either compensated or isolated 49F 3 I 46 CBFP 62 3I 50 51 I 0 67N 0 I 79 3I harm TCS CBCM 0 I MCS 000 R 3I I0 U0 REX 521 M02 UserOutgM02 Application Example 7 ...

Page 190: ... outgoing feeder REX 521 CB DC ES 0 1 5 0 2 v 100V Uo b da dn A N OverviewOutgM02 Circuit breaker failure protection Blocking signal to incoming feeder START 3I TRIP circuit breaker CLOSE circuit breaker Internal relay fault Control signal for selecting the basic angle of Io BACTRL External reclosure initialization signal Definite trip alarm ...

Page 191: ...evices Refer to REX 521 Technical Reference Manual General see Section 1 5 Related documents for further information about how to set the rated currents and voltage 10 3 3 Protection All the necessary settings for the protection functions can be set via the Relay Setting Tool or the local HMI The settings can be found in Main menu Protection The overcurrent the phase discontinuity and thermal over...

Page 192: ...pping carried out by the auto reclose function fails Fig 10 3 3 1 1 An auto reclose sequence when AR is initiated by the start signal An auto reclose sequence can also be initiated by the trip signal of a protection function The trip signal from the protection trips the breaker after the set start time of the protection function When the set dead time of the auto reclosure function elapses the fun...

Page 193: ...pecific initiation method can be enabled or disabled with the and push buttons The checksum will be 1 if the 3I Start AR1 is set and 2 if the 3I Trip AR1 is set After the initiation method is chosen the settings for the auto recloser function has to be done In Main menu Protection O I General setting the operation is taken in use with the AR operation set to ON and the Reclaim time can be set The ...

Page 194: ...e named as O I ACTIVE O I Alarm1 and O I Alarm2 Refer to the CD ROM Technical Descriptions of Functions see Section 1 5 Related documents for more information about the auto reclosing function 10 3 4 Protection signal routing The settings for the protection signal routing can be implemented as described in the first application example see Section 9 1 Outgoing feeder Basic B01 10 3 5 Indication an...

Page 195: ...for the standard configuration M02 are presented 10 3 6 1 Definite trip alarm to output relay To receive the DEFTRIP signal on an output contact go to Main menu Configuration Output SWGRP O I Alarm 1 press the E button and scroll to the DEFTRIP and take it in to use with the help of the and push buttons The checksum for O I Alarm 1 is then 32 The O I Alarm1 signal can then be routed to an output c...

Page 196: ... in the same way as mentioned above 10 3 6 3 Basic angle control by digital input If an external control signal determined from the earthing situation of the network is available it can be used for changing the settings for the basic angle of the directional earth fault protection The angle can be switched in between 0 and 90 The usage of basic angle control is useful when compensated network is s...

Page 197: ...onfiguration M02 with breaker status indication control and alarm signals CB REX 521 DC ES 0 1 CBstatusL Circuit breaker failure protection Blocking signal to the incoming feeder START 3I TRIP circuit breaker CLOSE circuit breaker External reclosure initialization signal Definite trip alarm Control signal for selecting the basic angle of Io BACTRL ...

Page 198: ...198 ...

Page 199: ...ion is used because of the parallel feeders There is no earth fault protection included in this application example because residual voltage based protection can be located on the measurement cubicle of the busbar The three phase current measurement is established with Rogowski sensors and the residual voltage is calculated from phase to earth voltages which are measured by the voltage dividers Ph...

Page 200: ...8 DI9 IRF S01 S02 P01 P02 P03 HSPO1 TCS1 Mains ACFail TempAlarm CB DC CLOSE circuit breaker Circuit breaker failure protection Internal relay fault 3I TRIP2 to the HV side circuit breaker OC blocking signal from the outgoing feeders and the bus sectionalizer to the 3I stage TRIP1 circuit breaker OC blocking signal to the 3I stages 3I START OC blocking signal to the HV side 3I stage 3I START X2 1 D...

Page 201: ...r application the stage 3I of the overcurrent protection of the incoming feeder operate time selectively as a directional overcurrent back up protection of the outgoing feeders The stage 3I is used for the directional overcurrent protection of the parallel incoming feeders to disconnect faulty feeder from the network The stage 3I is used for the non directional short circuit protection of the busb...

Page 202: ...locking logic for example in a case where the phase to phase voltage is missing from either side of the circuit breaker because of the open miniature circuit breaker MCB of the measurement circuit 11 1 4 Connections All the necessary settings for the connections and signal routings can be set via the Relay Setting Tool or the local HMI 11 1 4 1 Protection signal routing The settings for the protec...

Page 203: ...tchgroups These settings can be found in Main menu Configuration Output SWGRP CBFP The CBFP signal is then connected to any of the output relays via Main menu Configuration Output Signals and in this example the circuit breaker failure signal is connected to the power output 1 PO1 11 1 5 3 Trip circuit supervision The trip circuit supervision is available for the HSPO1 relay If the resistance of t...

Page 204: ...d in this application example because residual voltage based protection can be located on the measurement cubicle of the busbar The three phase current measurement is established with current transformers and the residual voltage is measured with a set of voltage transformers in an open delta connection Phase to phase voltage measurements are established with voltage transformers Fig 11 2 1 1 H02 ...

Page 205: ... 11 14 13 16 15 18 17 X3 1 2 1 X4 1 2 1 4 5 3 7 8 6 11 10 9 13 12 14 17 15 18 X4 2 3 4 1 2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI9 IRF S01 S02 P01 P02 P03 HSPO1 TCS1 Mains ACFail TempAlarm CB DC CLOSE circuit breaker Circuit breaker failure protection Internal relay fault 3I TRIP2 to the HV side circuit breaker OC blocking signal from the outgoing feeders and the bus sectionalizer to the 3I stage TRIP...

Page 206: ...ctional short circuit protection of the busbar system The directional low set stage 3I is set to look into the protected line This means it is set to operate in reverse direction The definite time or IDMT mode can be used The directional stage 3I of the incoming feeder provides blocking signal to the 3I stage of the bus sectionalizer Also it will provide blocking signal for the 3I stages of the pa...

Page 207: ...art current and Operate timefor the function can be set In Main menu Protection 3I_ Control setting can for example the Drop off time and the length of the trip signal Trip pulse be set The data of the three last operations start or trip are recorded and the values of the most recent operation can be found in Main menu Protection 3I _ Recorded data1 3 11 2 4 Connections All the necessary settings ...

Page 208: ...er to block the overcurrent protection stage on the incoming feeder There are two input blocking signals Blocking 1 and Blocking 2 which can have different functions depending on the different protections See Fig 11 2 5 1 1 On the overcurrent stages 3I 3I and 3I the Blocking 1 input signal is connected to the BS1 input and the Blocking 2 input signal is connected to the BS2 input of the function I...

Page 209: ...t breaker failure protection All of the current based protection functions in the standard configuration H02 provide a delayed trip signal CBFP after the trip signal unless the fault has not disappeared during the set CBFP time delay In the circuit breaker failure protection the CBFP output can be used for operating an upstream circuit breaker The settings for breaker failure are set separately fo...

Page 210: ...ignal is configured to be operated by the CB pos open status from the selected digital input The BS signal can be connected via the switchgroup in Main menu Input SWGRP TCS1 The default setting of the parameter is Not in use Another solution is to use an external resistor to prevent the TCS1 alarm Refer to REX 521 Technical Reference Manual General see Section 1 5 Related documents for more inform...

Page 211: ...H03 is used for protection measuring and supervision on a bus sectionalizer in a single busbar system The supplying network can be compensated isolated solidly or resistance earthed UserOutgH03 3I 50 51 CBFP 62 3I 2f 68 SYNC 25 3U 3I TCS CBCM 0 I MCS 3I harm 000 R 3U harm Application Example 10 REX 521 H03 f ...

Page 212: ...al relay fault Definite trip alarm 100V U12 100V U23 100V U12b VT1 CT1 VT2 VT3 VT4 Iob Io IL1 IL2 IL3 CT2 CT3 CT4 CT5 5A 1A 5A 1A 5A 1A 5A 1A 1A 0 2A 27 25 24 22 21 19 18 16 15 13 14 12 10 11 9 7 8 6 4 5 3 1 2 X1 1 X4 2 5 6 7 8 9 10 12 11 14 13 16 15 18 17 X3 1 2 1 X4 1 2 1 4 5 3 7 8 6 11 10 9 13 12 14 17 15 18 X4 2 3 4 1 2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI9 IRF S01 S02 P01 P02 P03 HSPO1 TCS1 Mai...

Page 213: ... busbar system the stage 3I of the bus sectionalizer provides blocking signal to the 3I stage of the incoming feeders Also the 3I stage of the overcurrent protection of the bus sectionalizer provides a trip signal to the bus sectionalizer circuit breaker When a fault is limited to one busbar sector the blocking from the 3I stage of the bus sectionalizer overcurrent protection disappears and the 3I...

Page 214: ...busbar sections fed by own transformers the voltage difference between busbar sections is the most important criterion The synchro check function does not allow the circuit breaker to be closed if the voltage difference is too high If the voltage difference is high the inrush current between the busbar sectors can be too high In an application where a generator is connected to one of the busbar se...

Page 215: ...he open miniature circuit breaker MCB of the measurement circuit 11 3 4 Connections All the necessary settings for the connections and signal routings can be set via the Relay Setting Tool or the local HMI 11 3 4 1 Protection signal routing The settings for the protection signal routing can be implemented as described in the first application example see Section 9 1 Outgoing feeder Basic B01 11 3 ...

Page 216: ...tion of the phase current transformers The residual voltage is measured with a set of voltage transformers in an open delta connection Phase to phase voltage measurements are established with voltage transformers Fig 11 4 1 1 REX 521 H04 used for protection measuring and supervision on an outgoing feeder in a single busbar system The supplying network is either compensated or isolated REX 521 H04 ...

Page 217: ...L External reclosure initialization signal Definite trip alarm 100V U12 100V U23 100V U31 VT1 CT1 VT2 VT3 VT4 I ob I o I L1 I L2 I L3 CT2 CT3 CT4 CT5 5A 1A 5A 1A 5A 1A 5A 1A 1A 0 2A L1 L3 L2 27 25 24 22 21 19 18 16 15 13 14 12 10 11 9 7 8 6 4 5 3 1 2 X1 1 X4 2 5 6 7 8 9 10 12 11 14 13 16 15 18 17 X3 1 2 1 X4 1 2 1 4 5 3 7 8 6 11 10 9 13 12 14 17 15 18 X4 2 3 4 1 2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 D...

Page 218: ...ional earth fault protection and the neutral current I0 measured by the sum connection of the phase current transformers is used for non directional earth fault protection The technical data of the current transformers and the voltage transformer are set via the Relay Setting Tool or the local HMI The settings can be found in Main menu Configuration Meas devices Refer to REX 521 Technical Referenc...

Page 219: ...1 4 4 2 Auto reclosure function The auto reclosure function can be implemented as described in the seventh application example Section 10 3 Outgoing feeder Medium M02 11 4 5 Connections All the necessary settings for the connections and signal routings can be set via the Relay Setting Tool or the local HMI 11 4 5 1 Protection signal routing The settings for the protection signal routing can be imp...

Page 220: ...ection 9 2 Incoming feeder Basic B01 if overvoltage and undervoltage protection is required or wider range of measurements is needed The network is resistance or solidly earthed The three phase current measurement is established with current transformers The neutral current is measured via a current transformer located in the neutral earthing circuit on the LV side of the power transformer Phase t...

Page 221: ... 1 X4 2 5 6 7 8 9 10 12 11 14 13 16 15 18 17 X3 1 2 1 X4 1 2 1 4 5 3 7 8 6 11 10 9 13 12 14 17 15 18 X4 2 3 4 1 2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI9 IRF S01 S02 P01 P02 P03 HSPO1 TCS1 Mains ACFail TempAlarm CB DC 3U 27 3U 59 3I 50 51 f P 3U 3I Q E pf TCS CBCM 0 I MCS 3I harm 000 R 3U harm CBFP 62 I 0 50N 51N I 0 CLOSE circuit breaker 1 0 Circuit breaker failure protection Internal relay fault Io ...

Page 222: ...ented as described in the second application example Section 9 2 Incoming feeder Basic B01 11 5 3 3 Overvoltage and undervoltage protection Faults in the network or a faulty tap changer or voltage regulator of a power transformer may cause abnormal busbar voltages The overvoltage and undervoltage protection is used for preventing possible damages to the devices connected to the network In this app...

Page 223: ... Output SWGRP Trip 1 where the checksum of the settings is displayed 255 by default Using the HMI To change the settings for Trip 1 go to Output SWGRP Trip 1 and press the E button The different protection functions are displayed one at a time By pressing the or navigation push button it is possible to scroll between the different protections By pressing the or navigation push button the specific ...

Page 224: ... signal to the overcurrent relay on the HV side The outgoing blocking signal to the overcurrent relay on the HV side can be implemented as described in the second application example Section 9 2 Incoming feeder Basic B01 11 5 5 3 Earth fault stage Io to trip the breaker on the HV side of the transformer The earth fault stage Io to trip the breaker on the HV side of the transformer can be implement...

Page 225: ...ty in distribution networks The power quality function can be triggered by any of the alternatives listed below Manual triggering via the HMI With the external input signal Triggering via communication parameter Preset time and date External triggering can be made by means of the reserved input signals PQ 3Inf trig and PQ 3Unf trig connected to the digital inputs The settings can be found in Main ...

Page 226: ...y protection with two stages The network is either compensated or isolated The residual voltage is measured with a set of voltage transformers in an open delta connection Phase to phase voltage measurements are established with voltage transformers Fig 11 6 1 1 H06 is used for protection measuring and supervision in a measurement cubicle in a single busbar system The supplying network is either co...

Page 227: ...5A 1A 1A 0 2A L1 L3 L2 27 25 24 22 21 19 18 16 15 13 14 12 10 11 9 7 8 6 4 5 3 1 2 X1 1 X4 2 5 6 7 8 9 10 12 11 14 13 16 15 18 17 X3 1 2 1 X4 1 2 1 4 5 3 7 8 6 11 10 9 13 12 14 17 15 18 X4 2 3 4 1 2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI9 IRF S01 S02 P01 P02 P03 HSPO1 TCS1 Mains ACFail TempAlarm f 81U 3U 27 3U 59 59N U 0 TCS 0 I MCS 000 R 3U harm f 3U U 0 TRIP3 to all outgoing feeders Uo Uo U U U U an...

Page 228: ...to incoming feeder and outgoing feeders The settings for the residual voltage protection are made in the settings for the residual overvoltage functions and can be found in Main menu Protection Uo Uo 11 6 3 2 Overvoltage and undervoltage protection Faults in the network or a faulty tap changer or voltage regulator of a power transformer may cause abnormal busbar voltages The overvoltage and underv...

Page 229: ...al of the f stage is connected to the power output relay PO3 via Trip 3 signal Also the residual voltage stage Uo under and overvoltage protection trips are connected to this power output and those signals have to be connected to all outgoing feeders Therefore the trip signal of the high stage f will be connected to all circuit breakers of the outgoing feeders All outgoing feeders are included in ...

Page 230: ...d one at a time By pressing the or navigation push button it is possible to scroll between the different protections By pressing the or navigation push button the specific protection function trip signal can be connected or disconnected To change the settings for PO2 and PO3 go to Output Signals PO2 PO3 and press the E button The different signals Trip 2 Trip 3 CBFP etc are displayed one at a time...

Page 231: ...gnals Triggering on voltage measurement Manual triggering via the HMI or with the external input signal Triggering via communication parameter Periodic triggering Regardless of the triggering type each recording generates the event E31 The triggering time and reason are included in the recording Number of recordings can be viewed in Main menu Measurements DREC Control setting records External trig...

Page 232: ...RP Alarm 1 or Alarm 2 The Alarm 1 or Alarm 2 output signal can be then connected to an output relay and the settings are done in Main menu Output Signals Refer to the CD ROM Technical Descriptions of Functions PQCU3H for more information about the power quality function 11 7 Motor protection High H07 11 7 1 Features This application example describes a single busbar motor feeder including Non dire...

Page 233: ...s Fig 11 7 1 1 H07 is used for protection measuring and supervision of a single busbar motor feeder M REX 521 H07 Application example 14 49 3 60 F 3I 37 I 2 46 46R 3I 3I 48 14 66 I s2t n 3I 50N 51N I0 50 51 f P 3U 3I I0 U0 Q E pf TCS CBCM 0 I M CS 3I har m 000 R 3U har m CBFP 62 3U 27 H07applex ...

Page 234: ...3 14 12 10 11 9 7 8 6 4 5 3 1 2 X1 1 X4 2 5 6 7 8 9 10 12 11 14 13 16 15 18 17 X3 1 2 1 X4 1 2 1 4 5 3 7 8 6 11 10 9 13 12 14 17 15 18 X4 2 3 4 1 2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI9 IRF S01 S02 P01 P02 P03 HSPO1 TCS1 P1 P2 S1 S2 S1 S2 1 0 M49 3 60 F 3I 37 I 2 46 46R 3I 3I 48 14 66 I s 2t n 3I 50 51 I 0 50N 51N f P 3U 3I I 0 U 0 Q E pf TCS CBCM 0 I M CS 3I har m 000 R 3U har m CBFP 62 3U 27 Circu...

Page 235: ...the thermal unit forms an overload protection with two time constants separately for both the stator and the rotor Two setting groups basic settings and advanced settings are available Normally the user sets the motor data only to the basic settings and the relay automatically calculates the advanced settings The type of the motor to be protected is selected by means of the Device type setting The...

Page 236: ... start up time To find out whether the motor is speeding up or not a speed switch on the motor shaft is used Refer to Fig 11 7 1 2 for an example of speed switch connection to the inputs of REX 521 The speed switch information is used to control the stall protection the operation mode of Is2t n is set to I2 t stall In case the motor starts accelerating the speed switch will inhibit the stall prote...

Page 237: ...the setting of the Time limit in this case is set to 41 seconds Note that the start sequence still proceeds even though the inhibit is activated The inhibit is only interrupting the close path to the circuit breaker and thereby preventing further start ups Furthermore the recommendation of at most three starts within eight hours means that the count down should reach the inhibit level after 8 hour...

Page 238: ... 3I settings and 2 to double the 3I settings 11 7 3 5 Unbalance protection The negative phase sequence protection I2 and I2 monitors the current asymmetry of the network and protects the motor against heavy network unbalance or single phasing Typically the operating time of the protection follows an inverse time characteristic Selecting Start value setting The Start value setting is the negative p...

Page 239: ... reversed direction of rotation 11 7 3 7 Undercurrent protection The undercurrent protection 3I operates upon a sudden loss of load The protection is used for example for submersible pumps where the cooling is based on a constant flow of liquid If this flow is interrupted the cooling capacity of the motor is reduced This condition is detected by the undercurrent unit which trips the motor 11 7 3 8...

Page 240: ...h remotely and locally by the function block I O IND3 Indication can be based on the measured current level and or on the state of the speed switch binary input or on the measured current level and circuit breaker state The open indication of I O IND3 function block corresponds to Stop status and close indication corresponds to Runs status of the motor The basis for the motor status indication can...

Page 241: ... overvoltage and undervoltage protection is required or wider range of measurements is needed The network is resistance or solidly earthed The three phase current measurement is established with current transformers The neutral current is measured via a current transformer located in the neutral earthing circuit on the LV side of the power transformer Phase to earth voltage measurements are establ...

Page 242: ...X4 2 5 6 7 8 9 1 0 1 2 1 1 1 4 1 3 1 6 1 5 1 8 1 7 X3 1 2 1 X4 1 2 1 4 5 3 7 8 6 1 1 1 0 9 1 3 1 2 1 4 1 7 1 5 1 8 X4 2 3 4 1 2 DI1 DI2 DI3 DI4 DI5 DI6 DI7 DI8 DI9 IRF S0 1 S0 2 P0 1 P0 2 P0 3 H SPO 1 TCS1 Mains ACFail TempAlarm C B DC 3 U 2 7 3 U 5 9 3 I 5 0 5 1 f P 3 U 3 I Q E p f TC S C B C M 0 I M C S 3I harm 0 0 0 R 3U harm C B FP 6 2 I 0 5 0 N 5 1 N I 0 1 0 P1 P2 S1 S2 S1 S2 3U_B CLOSE circu...

Page 243: ...ing feeder Basic B01 11 8 3 2 Earth fault protection The earth fault protection can be implemented as described in the second application example Section 9 2 Incoming feeder Basic B01 11 8 3 3 Overvoltage and undervoltage protection Faults in the network or a faulty tap changer or voltage regulator of a power transformer may cause abnormal busbar voltages The overvoltage and undervoltage protectio...

Page 244: ...ignal the settings are made directly in Main menu Configuration Output SWGRP Trip 1 where the checksum of the settings is displayed 255 by default Using the HMI To change the settings for Trip 1 go to Output SWGRP Trip 1 and press the E button The different protection functions are displayed one at a time By pressing the or navigation push button it is possible to scroll between the different prot...

Page 245: ... signal to the overcurrent relay on the HV side The outgoing blocking signal to the overcurrent relay on the HV side can be implemented as described in the second application example Section 9 2 Incoming feeder Basic B01 11 8 5 3 Earth fault stage Io to trip the breaker on the HV side of the transformer The earth fault stage Io to trip the breaker on the HV side of the transformer can be implement...

Page 246: ...ty in distribution networks The power quality function can be triggered by any of the alternatives listed below Manual triggering via the HMI With the external input signal Triggering via communication parameter Preset time and date External triggering can be made by means of the reserved input signals PQ 3Inf trig and PQ 3Unf trig connected to the digital inputs The settings can be found in Main ...

Page 247: ...e discontinuity protection thermal overload protection for feeders multiple shot auto recloser circuit breaker failure protection lockout Refer to chapter Lockout function in this manual multiple stage three phase directional overcurrent protection low set high set and instantaneous stage available under overfrequency protection load shedding scheme circuit breaker synchro check direction of energ...

Page 248: ...hase voltage or phase to phase voltage measurement indication and supervision frequency measurement indication and supervision power factor measurement indication and supervision residual current measurement indication and supervision residual voltage measurement indication and supervision energy counter forward or reverse active reactive energy annunciating event generating and value recording fu...

Page 249: ......

Page 250: ...ABB Oy Distribution Automation P O Box 699 FI 65101 Vaasa FINLAND Tel 358 10 22 11 Fax 358 10 224 1094 www abb com substationautomation 1MRS 751802 MUM EN 05 2005 ...

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Summary of Contents for REX 521

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ABB REX 521, Technical Reference Manual, Standard Configurations

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Summary of Contents for REX 521

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