GE 489 User Manual
Page 15
GE Multilin
489 Generator Management Relay
1-7
1 INTRODUCTION
1.2 SPECIFICATIONS
1
Elements:
Trip and Alarm
OVERFREQUENCY
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:
25.01 to 70.00 in steps of 0.01
Curve Shapes:
1 level alarm, 2 level trip definite time
Time Delay:
0.1 to 5000.0 s in steps of 0.1
Pickup Accuracy:
±0.02 Hz
Timing Accuracy:
±100 ms or ±0.5% of total time
Elements:
Trip and Alarm
NEUTRAL OVERVOLTAGE (FUNDAMENTAL)
Pick-up Level:
2.0 to 100.0 V secondary in steps of 0.01
Time Delay:
0.1 to 120.0 s in steps of 0.1
Pickup Accuracy:
as per Neutral Voltage Input
Timing Accuracy:
±100 ms or ±0.5% of total time
Elements:
Trip and Alarm
NEUTRAL UNDERVOLTAGE (3RD HARMONIC)
Blocking Signals:
Low power and low voltage if open delta
Pick-up Level:
0.5 to 20.0 V secondary in steps of 0.01
if open delta VT; adaptive if wye VT
Time Delay:
5 to 120 s in steps of 1
Pickup Accuracy:
as per Neutral Voltage Input
Timing Accuracy:
±3.0 s
Elements:
Trip and Alarm
LOSS OF EXCITATION (IMPEDANCE)
Pickup Level:
2.5 to 300.0
Ω secondary in steps of 0.1
with adjustable impedance offset 1.0 to
300.0
Ω secondary in steps of 0.1
Time Delay:
0.1 to 10.0 s in steps of 0.1
Pickup Accuracy:
as per Voltage and Phase Current Inputs
Timing Accuracy:
±100 ms or ±0.5% of total time
Elements:
Trip (2 zones using impedance circles)
DISTANCE (IMPEDANCE)
Pickup Levels:
0.1 to 500.0
Ω secondary in steps of 0.1
50 to 85° reach in steps of 1
Time Delay:
0.0 to 150.0 s in steps of 0.1
Pickup Accuracy:
as per Voltage and Phase Current Inputs
Timing Accuracy:
150 ms ±50 ms or ±0.5% of total time
Elements:
Trip (two trip zones)
REACTIVE POWER
Block From Online:
0 to 5000 s in steps of 1
Pick- up Level:
0.02 to 1.50
× rated Mvar
(positive and negative)
Time Delay:
0.2 to 120.0 s in steps of 0.1
Pickup Accuracy:
see power metering
Timing Accuracy:
±100ms or ±0.5% of total time
Elements:
Trip and Alarm
REVERSE POWER
Block From Online:
0 to 5000 s in steps of 1
Pick- up Level:
0.02 to 0.99
× rated MW
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 and Alarm
LOW FORWARD POWER
Block From Online:
0 to 15000 s in steps of 1
Pick- up Level:
0.02 to 0.99
× rated MW
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 and Alarm
PULSE OUTPUT
Parameters:
+ kwh, +kvarh, -kvarh
Interval:
1 to 50000 in steps of 1
Pulse Width:
200 to 1000 ms in steps of 1 ms
RTDS 1 TO 12
Pickup:
1 to 250°C in steps of 1
Pickup Hysteresis:
2°C
Time Delay:
3 sec.
Elements:
Trip and Alarm
OVERLOAD / STALL PROTECTION / THERMAL MODEL
Overload Curves:
15 Standard Overload Curves
Custom Curve
Voltage Dependent Custom Curve
(all curves time out against average
phase current)
Curve Biasing:
Phase Unbalance
Hot/Cold Curve Ratio
Stator RTD
Online Cooling Rate
Offline Cooling Rate
Line Voltage
Overload Pickup:
1.01 to 1.25
Pickup Accuracy:
as per Phase Current Inputs
Timing Accuracy:
±100 ms or ±2% of total time
Elements:
Trip and Alarm
OTHER FEATURES
Serial Start/Stop Initiation
Remote Reset (Configurable Digital Input)
Test Input (Configurable Digital Input)
Thermal Reset (Configurable Digital Input)
Dual Setpoints
Pre-Trip Data
Event Recorder
Waveform Memory
Fault Simulation
VT Failure
Trip Counter
Breaker Failure
Trip Coil Monitor
Generator Running Hours Alarm
IRIG-B Failure Alarm
ENVIRONMENTAL
Ambient Operating Temperature: –40°C to +60°C
Ambient Storage Temperature: 40°C to +80°C.
Humidity:
Up to 90%, noncondensing.
Altitude:
Up to 2000 m
Pollution Degree:
2