GE 750 User Manual

GE Power Management 750/760 Feeder Management Relay
vii
TABLE OF CONTENTS
12.4.4 GROUND DIRECTIONAL...................................................................... 12-27
12.4.5 GROUND DIRECTIONAL SETPOINTS ................................................ 12-28
12.5 SENSITIVE GROUND CURRENT
12.5.1 DESCRIPTION ...................................................................................... 12-30
12.5.2 SENSITIVE GROUND TIME OVERCURRENT..................................... 12-30
12.5.3 SENSITIVE GROUND INSTANTANEOUS OVERCURRENT............... 12-32
12.5.4 SENSITIVE GROUND DIRECTIONAL.................................................. 12-34
12.5.5 SENSITIVE GROUND DIRECTIONAL SETPOINTS............................. 12-35
12.5.6 RESTRICTED EARTH FAULT .............................................................. 12-37
a STABILIZING RESISTOR...................................................................... 12-37
b NON-LINEAR RESISTOR ..................................................................... 12-37
c SAMPLE APPLICATION........................................................................ 12-38
d CALCULATING THE STABILIZING RESISTOR................................... 12-39
e DETERMINING THE USE OF A NON-LINEAR RESISTOR ................. 12-39
12.6 NEGATIVE SEQUENCE
12.6.1 DESCRIPTION ...................................................................................... 12-41
12.6.2 NEGATIVE SEQUENCE TIME OVERCURRENT ................................. 12-41
12.6.3 NEGATIVE SEQUENCE INSTANTANEOUS OVERCURRENT ........... 12-43
12.6.4 NEGATIVE SEQUENCE DIRECTIONAL .............................................. 12-45
12.6.5 NEGATIVE SEQUENCE VOLTAGE...................................................... 12-47
12.7 VOLTAGE
12.7.1 DESCRIPTION ...................................................................................... 12-49
12.7.2 BUS UNDERVOLTAGE......................................................................... 12-49
12.7.3 UNDERVOLTAGE INVERSE TIME DELAY CHARACTERISTICS....... 12-50
12.7.4 LINE UNDERVOLTAGE ........................................................................ 12-52
12.7.5 OVERVOLTAGE.................................................................................... 12-54
12.7.6 NEUTRAL DISPLACEMENT ................................................................. 12-56
12.8 FREQUENCY
12.8.1 DESCRIPTION ...................................................................................... 12-58
12.8.2 UNDERFREQUENCY............................................................................ 12-58
12.8.3 FREQUENCY DECAY........................................................................... 12-60
12.9 BREAKER FAILURE
12.9.1 DESCRIPTION ...................................................................................... 12-62
12.9.2 SETTINGS............................................................................................. 12-62
13. S6 MONITORING
13.1 CURRENT LEVEL
13.1.1 DESCRIPTION ........................................................................................ 13-1
13.1.2 PHASE CURRENT LEVEL...................................................................... 13-1
13.1.3 NEUTRAL CURRENT LEVEL ................................................................. 13-1
13.2 POWER FACTOR
13.2.1 DESCRIPTION ........................................................................................ 13-4
13.2.2 SETPOINTS............................................................................................. 13-5
13.3 FAULT LOCATOR
13.3.1 DESCRIPTION ........................................................................................ 13-7
13.3.2 SETPOINTS............................................................................................. 13-8
13.4 DEMAND
13.4.1 DESCRIPTION ........................................................................................ 13-9
13.4.2 CURRENT DEMAND............................................................................. 13-10
13.4.3 REAL POWER DEMAND ...................................................................... 13-12
13.4.4 REACTIVE POWER DEMAND.............................................................. 13-14
13.4.5 APPARENT POWER DEMAND ............................................................ 13-16

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English