GE 489

GE Power Management
489 Generator Management Relay 1-5
1 INTRODUCTION 1.2 SPECIFICATIONS
1
ANALOG CURRENT OUTPUT
Type: Active
Ran
g
e: 4 to 20mA, 0 to 1 mA
(must be specified with order)
Accuracy: ±1% of full scale
4 to 20 mA max. load: 1.2 kΩ
0 to 1mA max. load: 10 kΩ
Isolation: 36 Vpk
(isolated with RTDs and analo
g
inputs)
4 Assi
g
nable Outputs: Phase A, B, C output current
3 phase avera
g
e current
ne
g
ative sequence current
g
enerator load
hottest stator RTD
hottest bearin
g
RTD
RTD # 1 to 12
AB volta
g
e
BC volta
g
e
CA volta
g
e
avera
g
e phase-phase volta
g
e
volts/hertz
frequency
3rd harmonic neutral volta
g
e
power factor
3 phase reactive power (Mvar)
3 phase real power (MW)
3 phase apparent power (MVA)
analo
g
inputs 1 to 4
tachometer
thermal capacity used
I, Mvar, MW, MVA demands
Torque
OUTPUT RELAYS
Confi
g
uration: 6 electromechanical Form C relays
Contact Material: silver alloy
Operate Time: 10 ms
Max Ratin
g
s for 100000 operations:
TERMINALS
Low Volta
g
e (A, B, C, D terminals): 12 AWG max
Hi
g
h Volta
g
e (E, F, G, H terminals): #8 rin
g
lu
g
,
10 AWG wire standard
POWER METERING
Ran
g
e: 0.000 to 2000.000 ±Mw, ±Mvar, MVA
Accuracy
at Iav
g
< 2 × CT:
±1% of
×
2
×
CT
×
VT
×
VT full-scale
at Iav
g
> 2 × CT:
±1.5% of
×
20
×
CT
×
VT
×
VT full-scl.
WATTHOUR AND VARHOUR METERING
Description: Continuous total of +watthours and
±varhours
Ran
g
e: 0.000 to 4000000.000 MvarHours
Timin
g
Accuracy: ±0.5%
Update Rate: 50 ms
DEMAND METERING
Metered Values: Maximum Phase Current
3 Phase Real Power
3 Phase Apparent Power
3 Phase Reactive Power
Measurement Type: Rollin
g
Demand
Demand Interval: 5 to 90 minutes in steps of 1
Update Rate: 1 minute
Elements: Alarm
GENERAL INPUT A TO G (DIGITAL INPUT)
Confi
g
urable: Assi
g
nable Di
g
ital Inputs 1 to 7
Time Delay: 0.1 to 5000.0 s in steps of 0.1
Block From Online: 0 to 5000 s in steps of 1
Timin
g
Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip, Alarm, and Control
SEQUENTIAL TRIP (DIGITAL INPUT)
Confi
g
urable: Assi
g
nable to Di
g
ital Inputs 1 to 7
Pickup Level: 0.02 to 0.99 × rated MW in steps of 0.01
Low Forward Power / Reverse Power
Time Delay: 0.2 to 120.0 s in steps of 0.1
Pickup Accuracy: see power meterin
g
Timin
g
Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip
FIELD BREAKER DISCREPANCY (DIGITAL INPUT)
Confi
g
urable: Assi
g
nable to Di
g
ital Inputs 1 to 7
Time Delay: 0.1 to 500.0 s in steps of 0.1
Timin
g
Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip
TACHOMETER (DIGITAL INPUT)
Confi
g
urable: Assi
g
nable to Di
g
ital Inputs 4 to 7
RPM Measurement: 100 to 7200 RPM
Duty Cycle of Pulse: >10%
Pickup Level: 101 to 175 × rated speed in steps of 1
Time Delay: 1 to 250 s in steps of 1
Timin
g
Accuracy: ±0.5 s or ±0.5% of total time
Elements: Trip and Alarm
OVERCURRENT ALARM
Pick-up Level: 0.10 to 1.50 × FLA in steps of 0.01
avera
g
e phase current
Time Delay: 0.1 to 250.0 s in steps of 0.1
Pickup Accuracy: as per Phase Current Inputs
Timin
g
Accuracy: ±100 ms or ±0.5% of total time
Elements: Alarm
VOLTAGE MAKE/CARRY BREAK MAX.
LOAD
CTS 0.2 s
DC
RESISTIVE
30 V 10 A 30 A 10 A 300 W
125 V 10 A 30 A 0.5 A 62.5 W
250 V 10 A 30 A 0.3 A 75 W
DC
INDUCTIVE
L/R = 40 ms
30 V 10 A 30 A 5 A 150 W
125 V 10 A 30 A 0.25 A 31.3 W
250 V 10 A 30 A 0.15 A 37.5 W
AC
RESISTIVE
120 V 10 A 30 A 10 A 2770 VA
250 V 10 A 30 A 10 A 2770 VA
AC
INDUCTIVE
PF = 0.4
120 V 10 A 30 A 4 A 480 VA
250 V 10 A 30 A 3 A 750 VA
3
3