GE 489 - Manual (Page 135)

GE Multilin 489 Generator Management Relay 5-3
5 ACTUAL VALUES 5.2 A1 STATUS
5
5.2A1 STATUS 5.2.1 GENERATOR STATUS
PATH: ACTUAL VALUES Ö A1 STATUS Ö GENERATOR STATUS
These messages describe the status of the generator at any given point in time. If the generator has been tripped, is still
offline, and the 489 has not yet been reset, the
GENERATOR STATUS will be "Tripped". The GENERATOR THERMAL CAPACITY
USED value reflects an integrated value of both the stator and rotor thermal capacity used. The values for ESTIMATED TRIP
TIME ON OVERLOAD will appear whenever the 489 thermal model picks up on the overload curve.
5.2.2 LAST TRIP DATA
PATH: ACTUAL VALUES Ö A1 STATUS ÖØ LAST TRIP DATA
„ GENERATOR STATUS
„ [ENTER] for more
GENERATOR STATUS:
Offline
Range: Online, Offline, Tripped
GENERATOR THERMAL
CAPACITY USED: 0%
Range: 0 to 100%
Seen only if the Thermal Model is enabled
ESTIMATED TRIP TIME
ON OVERLOAD: Never
Range: 0 to 10000 sec., Never
Seen only if the Thermal Model is enabled
„ LAST TRIP DATA
„ [ENTER] for more
CAUSE OF LAST TRIP:
No Trip to Date
Range: No Trip to Date, General Input A to G, Sequential
Trip, Field-Bkr Discrep., Tachometer, Thermal
Model, Offline Overcurrent, Phase Overcurrent,
Neg. Seq. Overcurrent, Ground Overcurrent,
Phase Differential, RTDs 1 to 12, Overvoltage,
Undervoltage, Volts/Hertz, Phase Reversal,
Underfrequency, Overfrequency, Neutral O/V,
Neutral U/V (3rd), Reactive Power, Reverse
Power, Low Forward Power, Inadvertent Energ.,
Analog Inputs 1 to 4
TIME OF LAST TRIP:
09:00:00.00
Range: hour:min:sec
DATE OF LAST TRIP:
Jan 01 1995
Range: Month Day Year
TACHOMETER
PRETRIP: 3600 RPM
Range: 0 to 3600 RPM
Seen only if Tachometer is assigned as an input.
A: 0 B: 0
C: 0 A PreTrip
Range: 0 to 999999 A. Represents current measured
from output CTs. Seen only if a trip has occurred.
a: 0 b: 0
c: 0 DA PreTrip
Range: 0 to 999999 A. Represents differential current.
Seen only if differential element is enabled.
NEG. SEQ. CURRENT
PRETRIP: 0% FLA
Range: 0 to 2000% FLA
Seen only if there has been a trip.
GROUND CURRENT
PRETRIP: 0.00 A
Range: 0.00 to 200000.00 A
Not seen if GROUND CT is "None"
GROUND CURRENT
PRETRIP: 0.00 Amps
Range: 0.0 to 5000.0 A
Vab: 0 Vbc: 0
Vca: 0 V PreTrip
Range: 0 to 50000 V
Not seen if VT CONNECTION is "None"
FREQUENCY
PRETRIP: 0.00 Hz
Range: 0.00 to 90.00 Hz
Not seen if VT CONNECTION is "None"
NEUTRAL VOLT (FUND)
PRETRIP: 0.0 V
Range: 0.0 to 25000.0 V
Seen only if there is a neutral voltage
transformer.
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