Ge 489 User Manual Page 97
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GE Multilin 489 Generator Management Relay 4-47
4 SETPOINTS 4.8 S7 POWER ELEMENTS
4
4.8.3 REVERSE POWER
PATH: SETPOINTS ÖØ S7 POWER ELEMENTS ÖØ REVERSE POWER
If enabled, once the magnitude of 3-phase total power exceeds the Pickup Level in the reverse direction (negative MW) for
a period of time specified by the Delay, a trip or alarm will occur. The level is programmed in per unit of generator rated MW
calculated from the rated MVA and rated power factor. If the generator is accelerated from the power system rather than the
prime mover, the reverse power element may be blocked from start for a specified period of time. A value of zero for the
block time indicates that the reverse power protection is active as soon as both current and voltage are measured regard-
less of whether the generator is online or offline. If the VT type is selected as "None" or VT fuse loss is detected, the
reverse power protection is disabled.
The minimum magnitude of power measurement is determined by the phase CT minimum of 2% rated CT primary.
If the level for reverse power is set below that level, a trip or alarm will only occur once the phase current exceeds
the 2% cutoff.
Users are cautioned that a reverse power element may not provide reliable indication when set to a very low setting, partic-
ularly under conditions of large reactive loading on the generator. Under such conditions, low forward power is a more reli-
able element.
REVERSE POWER
[ENTER] for more
BLOCK REVERSE POWER
FROM ONLINE: 1 s
Range: 0 to 5000 s in steps of 1
REVERSE POWER
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to 5
REVERSE POWER ALARM
LEVEL: 0.05 x Rated MW
Range: 0.02 to 0.99 × Rated MW in steps of 0.01
REVERSE POWER ALARM
DELAY: 10.0 s
Range: 0.2 to 120.0 s in steps of 0.1
REVERSE POWER ALARM
EVENTS: Off
Range: On, Off
REVERSE POWER
TRIP: Off
Range: Off, Latched, Unlatched
ASSIGN TRIP
RELAYS (1-4): 1---
Range: Any combination of Relays 1 to 4
REVERSE POWER TRIP
LEVEL: 0.05 x Rated MW
Range: 0.02 to 0.99 × Rated MW in steps of 0.01
REVERSE POWER TRIP
DELAY: 20.0 s
Range: 0.2 to 120.0 s in steps of 0.1
ENTER
ESCAPE
ð
ð
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
NOTE
- GENERATOR MANAGEMENT RELAY 1
- Instruction Manual 1
- 1. INTRODUCTION 1.1 OVERVIEW 3
- 4. SETPOINTS 4.1 OVERVIEW 3
- 5. ACTUAL VALUES 5.1 OVERVIEW 5
- 7. TESTING 7.1 TEST SETUP 6
- TABLE OF CONTENTS 8
- 27TN59GN 9
- ≥ 2 × CT: ±1% of 20 × CT 12
- LONG-TERM STORAGE 16
- 808704A1.CDR 19
- 2 INSTALLATION 2.1 MECHANICAL 21
- 2.1.5 TERMINAL LOCATIONS 21
- Figure 2–8: TERMINAL LAYOUT 21
- 2.1 MECHANICAL 2 INSTALLATION 22
- Table 2–1: 489 TERMINAL LIST 22
- 2 INSTALLATION 2.2 ELECTRICAL 23
- RTD SENSING 28
- GE Multilin 31
- 2.2 ELECTRICAL 2 INSTALLATION 32
- S3 DIGITAL INPUTS / 33
- SETPOINT 34
- NEW SETPOINT HAS BEEN 35
- 808745A1.CDR 37
- 808744A1.CDR 39
- 32 I 151 A8 .000 41
- 808726A2.CDR 45
- 808730A2.CDR 46
- VOLTAGE LEVEL 47
- CURRENT PHASOR 47
- VOLTAGE PHASOR 47
- CURRENT LEVEL 47
- EVENT SELECT BUTTONS 48
- EVENT LISTING 48
- VIEW DATA 48
- CLEAR EVENTS 48
- ACTIVATE SET 56
- (EQ 4.1) 62
- (EQ 4.2) 63
- S1 489 SETUP Ö 64
- Range: Breaker Auxiliary a 64
- Breaker Auxiliary b 64
- (EQ 4.8) 74
- 808731A1.CDR 75
- (EQ 4.9) 76
- CURRENT VOLTAGE 77
- (EQ 4.10) 78
- (EQ 4.11) 78
- I(multiples of CT) 81
- (multiples of CT) 81
- 808812A3.CDR 82
- (EQ 4.18) 83
- (EQ 4.19) 84
- TIME DELAY SETTING 85
- TO Vneutral OFEACH489 90
- AUXILIARY CONTACT 90
- TO DIGITAL INPUT FOR 90
- NEUTRAL O/V SUPERVISION 90
- GROUNDINGSWITCH 90
- (EQ 4.21) 91
- (EQ 4.22) 91
- (EQ 4.23) 92
- (EQ 4.24) 92
- 808740A1.CDR 94
- (EQ 4.25) 96
- 806827A1.CDR 105
- (EQ 4.26) 107
- (EQ 4.27) 107
- MULTIPLE OF FULL LOAD AMPS 108
- TIME IN SECONDS 108
- (EQ 4.28) 109
- TIME TO TRIP IN SECONDS 110
- THERMAL LIMITS 111
- FOR HIGH INERTIAL LOAD 111
- VOLTAGE DEPENDENT OVERLOAD 112
- (CUSTOM CURVE) 112
- VOLTAGE DEPENDENT 113
- OVERLOAD PROTECTION CURVES 113
- OVERLOAD PROTECTION at 80% V 114
- NEMA GE MULTILIN 115
- Thermal Capacity Used 116
- MOTOR TRIPPED 116
- 100% LOAD 116
- MOTOR STOPPED 116
- 80% LOAD 116
- 808721A1.CDR 118
- Range: On, Off 120
- (EQ 4.37) 123
- (EQ 4.38) 123
- 808738A1.CDR 124
- THIS FEATURE NOT PROGRAMMED 149
- THIS FEA 149
- TURE NOT PROGRAMMED 149
- THIS FEATURE NOT PRO 150
- LAST TRIP DATA: 158
- ACTIVE ALARMS: 158
- START BLOCK 158
- LOCKOUTS: 158
- 6.3.7 489 MEMORY MAP 172
- 6.3.8 MEMORY MAP DATA FORMATS 196
- No Counters Reported 202
- Configurable 202
- 7.1 TEST SETUP 7 TESTING 214
- A2 METERING DATA 218
- TEMPERATURE 218
- 3 PHASE VARIABLE AC TEST SET 224
- (EQ 7.5) 226
- (EQ 7.6) 226
- (EQ 7.7) 226
- 808739A1.CDR 229
- 808736A1.CDR 231
- 808735A1.CDR 231
- 808734A1.CDR 232
- (EQ A.1) 233
- (EQ A.2) 233
- HGF3/HGF5 234
- DIMENSIONS 234
- 808712A1.CDR 236
- 489 ANSI 237
- MODERATELY INVERSE 237
- NORMALLY INVERSE 238
- VERY INVERSE 239
- CURRENT (I/Ipu) 240
- TRIPTIME (sec) 240
- DEFINITE TIME 241
- SHORT INVERSE 242
- IAC INVERSE 243
- EXTREME INVERSE 245
- IEC CURVE A (BS142) 246
- IEC CURVE B (BS142) 247
- IEC CURVE C (BS142) 248
- GE Multilin Relay Warranty 251
- Numerics 253
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