GE 489 Instruction Manual page 15

1 INTRODUCTION
Elements: Trip and Alarm
OVERFREQUENCY
0.50 to 0.99 × rated voltage in Phase A
Required Voltage:
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
GE Multilin
LOW FORWARD POWER
Block From Online:
Pick- up Level:
Time Delay:
Pickup Accuracy:
Timing Accuracy:
Elements:
PULSE OUTPUT
Parameters:
Interval:
Pulse Width:
RTDS 1 TO 12
Pickup:
Pickup Hysteresis:
Time Delay:
Elements:
OVERLOAD / STALL PROTECTION / THERMAL MODEL
Overload Curves:
Curve Biasing:
Overload Pickup:
Pickup Accuracy:
Timing Accuracy:
Elements:
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:
Altitude:
Pollution Degree:
489 Generator Management Relay
1.2 SPECIFICATIONS
0 to 15000 s in steps of 1
0.02 to 0.99 × rated MW
0.2 to 120.0 s in steps of 0.1
see power metering
±100 ms or ±0.5% of total time
Trip and Alarm
+ kwh, +kvarh, -kvarh
1 to 50000 in steps of 1
200 to 1000 ms in steps of 1 ms
1 to 250°C in steps of 1
2°C
3 sec.
Trip and Alarm
15 Standard Overload Curves
Custom Curve
Voltage Dependent Custom Curve
(all curves time out against average
phase current)
Phase Unbalance
Hot/Cold Curve Ratio
Stator RTD
Online Cooling Rate
Offline Cooling Rate
Line Voltage
1.01 to 1.25
as per Phase Current Inputs
±100 ms or ±2% of total time
Trip and Alarm
Up to 90%, noncondensing.
Up to 2000 m
2
1
1-7