GE Power Management
489 Generator Management Relay 1-7
1 INTRODUCTION 1.2 SPECIFICATIONS
1
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 Volta
e Input
Timin
Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip and Alarm
NEUTRAL UNDERVOLTAGE (3RD HARMONIC)
Blockin
Si
nals: Low power and low volta
e 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:
at ≤20.0 V secondary: as per Neutral Volta
e Input
at >20.0 V secondary: ±5% of pickup
Timin
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 Volta
e and Phase Current Inputs
Timin
Accuracy: ±100 ms or ±0.5% of total time
Elements: Trip (2 zones usin
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 Volta
e and Phase Current Inputs
Timin
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 ne
ative)
Time Delay: 0.2 to 120.0 s in steps of 0.1
Pickup Accuracy: see power meterin
Timin
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 meterin
Timin
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 meterin
Timin
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
Volta
e Dependent Custom Curve
(all curves time out a
ainst avera
e
phase current)
Curve Biasin
: Phase Unbalance
Hot/Cold Curve Ratio
Stator RTD
Online Coolin
Rate
Offline Coolin
Rate
Line Volta
e
Overload Pickup: 1.01 to 1.25
Pickup Accuracy: as per Phase Current Inputs
Timin
Accuracy: ±100 ms or ±2% of total time
Elements: Trip and Alarm
OTHER FEATURES
Serial Start/Stop Initiation
Remote Reset (Confi
urable Di
ital Input)
Test Input (Confi
urable Di
ital Input)
Thermal Reset (Confi
urable Di
ital Input)
Dual Setpoints
Pre-Trip Data
Event Recorder
Waveform Memory
Fault Simulation
VT Failure
Trip Counter
Breaker Failure
Trip Coil Monitor
Generator Runnin
Hours Alarm
IRIG-B Failure Alarm
ENVIRONMENTAL
Ambient Operatin
Temperature: –40°C to +60°C
Ambient Stora
e Temperature: 40°C to +80°C.
Humidity: Up to 90%, noncondensin
.
Altitude: Up to 2000 m
Pollution De
ree: 2
It is recommended that the 489 be powered up
at least once per year to prevent deterioration
of electrolytic capacitors in the power supply.
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