GE 750 - Page 15

GE Power Management 750/760 Feeder Management Relay
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TABLE OF CONTENTS
17.7.10 NEUTRAL INSTANTANEOUS OVERCURRENT 1............................... 17-27
17.7.11 NEUTRAL INSTANTANEOUS OVERCURRENT 2............................... 17-27
17.7.12 NEUTRAL DIRECTIONAL OVERCURRENT ........................................ 17-28
a FORWARD TRIPPING WITH VOLTAGE POLARIZATION................... 17-28
b FORWARD TRIPPING W/ CURRENT POLARIZATION....................... 17-29
c FORWARD TRIPPING WITH DUAL POLARIZATION .......................... 17-30
17.7.13 GROUND TIME OVERCURRENT......................................................... 17-30
17.7.14 GROUND INSTANTANEOUS OVERCURRENT................................... 17-31
17.7.15 GROUND DIRECTIONAL OVERCURRENT......................................... 17-31
17.7.16 SENSITIVE GROUND TIME OVERCURRENT..................................... 17-31
17.7.17 SENSITIVE GROUND INSTANTANEOUS OVERCURRENT............... 17-31
17.7.18 SENSITIVE GROUND DIRECTIONAL OVERCURRENT ..................... 17-32
17.7.19 NEGATIVE SEQUENCE TIME OVERCURRENT ................................. 17-32
17.7.20 NEGATIVE SEQUENCE INSTANTANEOUS OVERCURRENT ........... 17-32
17.7.21 NEGATIVE SEQUENCE DIRECTIONAL OVERCURRENT.................. 17-32
17.7.22 NEGATIVE SEQUENCE VOLTAGE...................................................... 17-33
a FOR WYE VTs....................................................................................... 17-33
b FOR DELTA VTs ................................................................................... 17-33
17.7.23 BUS UNDERVOLTAGE 1 (2) ................................................................ 17-34
a FOR WYE VTs....................................................................................... 17-34
b FOR DELTA VTs ................................................................................... 17-35
c FOR WYE and DELTA VTs ................................................................... 17-36
17.7.24 LINE UNDERVOLT 3 (4) ....................................................................... 17-36
17.7.25 OVERVOLTAGE 1 (2) ........................................................................... 17-37
a FOR WYE VTs....................................................................................... 17-37
b FOR DELTA VTs ................................................................................... 17-37
c FOR WYE and DELTA VTs ................................................................... 17-38
17.7.26 NEUTRAL DISPLACEMENT (WYE VTs ONLY) ................................... 17-38
17.7.27 UNDERFREQUENCY 1 (2) ................................................................... 17-39
17.7.28 FREQUENCY DECAY........................................................................... 17-41
17.7.29 BREAKER FAILURE.............................................................................. 17-42
17.8 MONITORING
17.8.1 PHASE CURRENT LEVEL.................................................................... 17-43
17.8.2 NEUTRAL CURRENT LEVEL ............................................................... 17-43
17.8.3 FAULT LOCATOR ................................................................................. 17-44
17.8.4 CURRENT DEMAND............................................................................. 17-45
17.8.5 REAL POWER DEMAND ...................................................................... 17-45
17.8.6 REACTIVE POWER DEMAND.............................................................. 17-45
17.8.7 APPARENT POWER DEMAND ............................................................ 17-46
17.8.8 ANALOG THRESHOLD 1 (2) ................................................................ 17-46
17.8.9 ANALOG IN RATE 1 (2) ........................................................................ 17-46
17.8.10 OVERFREQUENCY .............................................................................. 17-47
17.8.11 POWER FACTOR 1(2) .......................................................................... 17-47
17.8.12 VT FAILURE .......................................................................................... 17-48
17.8.13 TRIP COIL MONITOR ........................................................................... 17-48
17.8.14 CLOSE COIL MONITOR ....................................................................... 17-48
17.8.15 BREAKER OPERATION FAILURE ....................................................... 17-49
17.8.16 ARCING CURRENT .............................................................................. 17-49
17.8.17 ANALOG OUTPUT CHANNELS............................................................ 17-49
17.8.18 IRIG-B.................................................................................................... 17-50
17.8.19 PULSE OUTPUT ................................................................................... 17-50
17.9 CONTROL SCHEMES
17.9.1 SETPOINT GROUP CONTROL ............................................................ 17-51
17.9.2 SYNCHROCHECK ................................................................................ 17-53
17.9.3 MANUAL CLOSE FEATURE BLOCKING ............................................. 17-56
a CONTROL OF O/C PROTECTION FEATURES ................................... 17-56
17.9.4 COLD LOAD PICKUP FEATURE BLOCKING ...................................... 17-58
a CONTROL OF O/C PROTECTION FEATURES ................................... 17-58
17.9.5 UNDERVOLTAGE RESTORATION ...................................................... 17-60