Ge 489 User Manual Page 89
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GE Multilin 489 Generator Management Relay 4-39
4 SETPOINTS 4.7 S6 VOLTAGE ELEMENTS
4
4.7.7 NEUTRAL OVERVOLTAGE (FUNDAMENTAL)
PATH: SETPOINTS ÖØ S6 VOLTAGE ELEMENTS ÖØ O/V (FUND)
The neutral overvoltage function responds to fundamental frequency voltage at the generator neutral. It provides ground
fault protection for approximately 95% of the stator windings. 100% protection is provided when this element is used in con-
junction with the Neutral Undervoltage (3rd harmonic) function. The alarm element is definite time and the trip element can
be either definite time or an inverse time curve. When the neutral voltage rises above the pickup level the element will begin
to time out. If the time expires an alarm or trip will occur. The reset rate is a linear reset time from the threshold of trip. The
alarm and trip levels are programmable in terms of Neutral VT secondary voltage.
NEUTRAL O/V (FUND)
[ENTER] for more
SUPERVISE WITH
DIGITAL INPUT: No
Range: Yes, No. Seen only if a digital input assigned to
GROUND SWITCH STATUS
NEUTRAL OVERVOLTAGE
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to 5
NEUTRAL O/V ALARM
LEVEL: 3.0 Vsec
Range: 2.0 to 100.0 Vsec in steps of 0.1
NEUTRAL OVERVOLTAGE
ALARM DELAY: 1.0 s
Range: 0.1 to 120.0 s in steps of 0.1
NEUTRAL OVERVOLTAGE
ALARM EVENTS: Off
Range: On, Off
NEUTRAL OVERVOLTAGE
TRIP: Off
Range: Off, Latched, Unlatched
ASSIGN TRIP
RELAYS (1-4): 1---
Range: Any combination of Relays 1 to 4
NEUTRAL O/V TRIP
LEVEL: 5.0 Vsec
Range: 2.0 to 100.0 Vsec in steps of 0.1
NEUTRAL OVERVOLTAGE
TRIP DELAY: 1.0 s
Range: 0.1 to 120.0 s in steps of 0.1
NEUTRAL O/V CURVE
RESET RATE: 0.0
Range: 0.0 to 999.9 in steps of 0.1
NEUTRAL O/V TRIP
ELEMENT: Definite Time
Range: Curve, Definite Time
The formula for the curve is:
(EQ 4.20)
where T = trip time in seconds
D =
NEUTRAL OVERVOLTAGE TRIP DELAY setpoint
V = neutral voltage
V
pickup
= NEUTRAL O/V TRIP LEVEL setpoint
The neutral overvoltage curves are shown on the right.
Refer to Appendix B for Application Notes.
ENTER
ESCAPE
ð
ð
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
MESSAGE
ESCAPE
T
D
VV
pickup
⁄()1–
---------------------------------------- -= when VV
pickup
>
808741A1.CDR
0.1
1
10
100
1000
11.11.21.31.4 1.51.61.71.81.92
Multiples of Overvoltage Pickup
10
3
1
0.3
0.1
TimetoTrip (seconds)
TIME DELAY SETTING
- 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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