GE 489 Instruction Manual page 13

1 INTRODUCTION
ANALOG CURRENT OUTPUT
Type: Active
Range: 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 analog inputs)
4 Assignable Outputs: Phase A, B, C output current
3 phase average current
negative sequence current
generator load
hottest stator RTD
hottest bearing RTD
RTD # 1 to 12
AB voltage
BC voltage
CA voltage
average phase-phase voltage
volts/hertz
frequency
3rd harmonic neutral voltage
power factor
3 phase reactive power (Mvar)
3 phase real power (MW)
3 phase apparent power (MVA)
analog inputs 1 to 4
tachometer
thermal capacity used
I, Mvar, MW, MVA demands
Torque
OUTPUT RELAYS
Configuration: 6 electromechanical Form C relays
Contact Material: silver alloy
Operate Time: 10 ms
Max Ratings for 100000 operations:
VOLTAGE MAKE/CARRY
CTS
DC 30 V 10 A
RESISTIVE
125 V 10 A
250 V 10 A
DC 30 V 10 A
INDUCTIVE
125 V 10 A
L/R = 40 ms
250 V 10 A
AC 120 V 10 A
RESISTIVE
250 V 10 A
AC 120 V 10 A
INDUCTIVE
250 V 10 A
PF = 0.4
TERMINALS
Low Voltage (A, B, C, D terminals): 12 AWG max
High Voltage (E, F, G, H terminals): #8 ring lug,
10 AWG wire standard
GE Power Management
BREAK MAX.
LOAD
0.2 s
30 A 10 A 300 W
30 A 0.5 A 62.5 W
30 A 0.3 A 75 W
30 A 5 A 150 W
30 A 0.25 A 31.3 W
30 A 0.15 A 37.5 W
30 A 10 A 2770 VA
30 A 10 A 2770 VA
30 A 4 A 480 VA
30 A 3 A 750 VA
489 Generator Management Relay
POWER METERING
Range: 0.000 to 2000.000 ±Mw, ±Mvar, MVA
Accuracy
at Iavg < 2 × CT:
±1% of
at Iavg > 2 × CT:
±1.5% of
WATTHOUR AND VARHOUR METERING
Description: Continuous total of +watthours and
±varhours
Range: 0.000 to 4000000.000 MvarHours
Timing 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: Rolling Demand
Demand Interval: 5 to 90 minutes in steps of 1
Update Rate: 1 minute
Elements: Alarm
GENERAL INPUT A TO G (DIGITAL INPUT)
Configurable: Assignable Digital 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
Timing Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip, Alarm, and Control
SEQUENTIAL TRIP (DIGITAL INPUT)
Configurable: Assignable to Digital Inputs 1 to 7
0.02 to 0.99 × rated MW in steps of 0.01
Pickup Level:
Low Forward Power / Reverse Power
Time Delay: 0.2 to 120.0 s in steps of 0.1
Pickup Accuracy: see power metering
Timing Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip
FIELD BREAKER DISCREPANCY (DIGITAL INPUT)
Configurable: Assignable to Digital Inputs 1 to 7
Time Delay: 0.1 to 500.0 s in steps of 0.1
Timing Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip
TACHOMETER (DIGITAL INPUT)
Configurable: Assignable to Digital Inputs 4 to 7
RPM Measurement: 100 to 7200 RPM
>10%
Duty Cycle of Pulse:
101 to 175 × rated speed in steps of 1
Pickup Level:
Time Delay: 1 to 250 s in steps of 1
Timing Accuracy: ±0.5 s or ±0.5% of total time
Elements: Trip and Alarm
OVERCURRENT ALARM
0.10 to 1.50 × FLA in steps of 0.01
Pick-up Level:
average phase current
Time Delay: 0.1 to 250.0 s in steps of 0.1
Pickup Accuracy: as per Phase Current Inputs
Timing Accuracy: ±100 ms or ±0.5% of total time
Elements: Alarm
1.2 SPECIFICATIONS
× 2 × CT × VT × VT full-scale
3
× 20 × CT × VT × VT full-scl.
3
1-5
1