GE 489 User Manual
Page 14
1-6
489 Generator Management Relay
GE Multilin
1.2 SPECIFICATIONS
1 INTRODUCTION
1
Timing 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
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
OFFLINE OVERCURRENT
Pick-up Level:
0.05 to 1.00
× CT in steps of 0.01
of any one phase
Time Delay:
3 to 99 cycles in steps of 1
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
+50ms at 50/60 Hz
Elements:
Trip
INADVERTENT ENERGIZATION
Arming Signal:
undervoltage and/or offline from breaker
status
Pick-up Level:
0.05 to 3.00
× CT in steps of 0.01
of any one phase
Time Delay:
no intentional delay
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
+50 ms at 50/60 Hz
Elements:
Trip
PHASE OVERCURRENT
Voltage Restraint:
Programmable fixed characteristic
Pick-up Level:
0.15 to 20.00
× CT in steps of 0.01
of any one phase
Curve Shapes:
ANSI, IEC, IAC, Flexcurve, Definite Time
Time Delay:
0.000 to 100.000 s in steps of 0.001
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
+50 ms at 50/60 Hz or ±0.5% total time
Elements:
Trip
NEGATIVE SEQUENCE OVERCURRENT
Pick-up Level:
3 to 100% FLA in steps of 1
Curve Shapes:
I
2
2
t trip defined by k, definite time alarm
Time Delay:
0.1 to 100.0 s in steps of 0.1
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
±100ms or ± 0.5% of total time
Elements:
Trip and Alarm
GROUND OVERCURRENT
Pick-up Level:
0.05 to 20.00
× CT in steps of 0.01
Curve Shapes:
ANSI, IEC, IAC, Flexcurve, Definite Time
Time Delay:
0.00 to 100.00 s in steps of 0.01
Pickup Accuracy:
as per Ground Current Input
Timing Accuracy:
+50 ms at 50/60 Hz or ±0.5% total time
Elements:
Trip
PHASE DIFFERENTIAL
Pick-up Level:
0.05 to 1.00
× CT in steps of 0.01
Curve Shape:
Dual Slope
Time Delay:
0 to 100 cycles in steps of 1
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
+50 ms at 50/60 Hz or ±0.5% total time
Elements:
Trip
GROUND DIRECTIONAL
Pickup Level:
0.05 to 20.00
× CT in steps of 0.01
Time Delay:
0.1 to 120.0 s in steps of 0.1
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
±100 ms or ±0.5% of total time
Elements:
Trip and Alarm
HIGH-SET PHASE OVERCURRENT
Pickup Level:
0.15 to 20.00
× CT in steps of 0.01
Time Delay:
0.00 to 100.00 s in steps of 0.01
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
±50 ms at 50/60 Hz or ±0.5% total time
Elements:
Trip
UNDERVOLTAGE
Pick-up Level:
0.50 to 0.99
× rated V in steps of 0.01
Curve Shapes:
Inverse Time, definite time alarm
Time Delay:
0.2 to 120.0 s in steps of 0.1
Pickup Accuracy:
as per Voltage Inputs
Timing Accuracy:
±100 ms or ±0.5% of total time
Elements:
Trip and Alarm
OVERVOLTAGE
Pick-up Level:
1.01 to 1.50
× rated V in steps of 0.01
Curve Shapes:
Inverse Time, definite time alarm
Time Delay:
0.2 to 120.0 s in steps of 0.1
Pickup Accuracy:
as per Voltage Inputs
Timing Accuracy:
±100 ms or ±0.5% of total time
Elements:
Trip and Alarm
VOLTS/HERTZ
Pick-up Level:
1.00 to 1.99
× nominal in steps of 0.01
Curve Shapes:
Inverse Time, definite time alarm
Time Delay:
0.1 to 120.0 s in steps of 0.1
Pickup Accuracy:
as per voltage inputs
Timing Accuracy:
±100 ms at
≥ 1.2 × Pickup
±300 ms at
< 1.2 × Pickup
Elements:
Trip and Alarm
VOLTAGE PHASE REVERSAL
Configuration:
ABC or ACB phase rotation
Timing Accuracy:
200 to 400 ms
Elements:
Trip
UNDERFREQUENCY
Required Voltage:
0.50 to 0.99
× rated voltage in Phase A
Block From Online:
0 to 5 sec. in steps of 1
Pick- up Level:
20.00 to 60.00 in steps of 0.01
Curve Shapes:
1 level alarm, two level trip definite time
Time Delay:
0.1 to 5000.0 sec. in steps of 0.1
Pickup Accuracy:
±0.02 Hz
Timing Accuracy:
±100 ms or ±0.5% of total time