GE 750 Instruction Manual page 55

CHAPTER 2: INTRODUCTION
2.4.5 Monitoring Elements
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL
PHASE/NEUTRAL CURRENT
Pickup level:
Dropout level:
Time delay:
Level accuracy:
Timing accuracy:
POWER FACTOR
Required voltage:
Pickup level:
Dropout level:
Time delay:
Level accuracy:
Timing accuracy:
ANALOG INPUT THRESHOLD
Pickup level:
Dropout level:
Time delay:
Level accuracy:
Timing accuracy:
ANALOG INPUT RATE
Pickup level:
Dropout level:
Time delay:
Level accuracy:
Timing accuracy:
OVERFREQUENCY
Required voltage:
Pickup level:
Dropout level:
Time delay:
Level accuracy:
Timing accuracy:
FAULT LOCATOR
Range:
Memory:
DATA LOGGER
Channels:
Sample rate:
Trigger source:
Trigger position:
Storage:
TRIP COUNTERS
Accumulates all ground, sensitive ground, neutral, negative sequence, and phase
0.05 to 20.00 × CT in steps of 0.01
97 to 98% of pickup level
0 to 60000 s in steps of 1 (Definite Time)
per current input
±100 ms
>30% of nominal in all phases
0.50 lag to 0.50 lead in steps of 0.01
0.50 lag to 0.50 lead in steps of 0.01
0 to 60000 s in steps of 1 (Definite Time)
±0.02
±100 ms
0 to 65535 units in steps of 1
2 to 20% of Pickup
(programmable, under/over)
0 to 60000 s in steps of 1
±1%
±100 ms
–1000 to 1000 units/hour in steps of 0.1
97 to 98% of pickup level
0 to 60000.0 s in steps of 1
±1%
±100 ms
>30% of nominal, phase A
20.01 to 65.00 Hz in steps of 0.01
Pickup – 0.03 Hz
0.0 to 6000.0 s in steps of 0.1
±0.02 Hz
±100 ms
–327 to 327 km (or miles)
0 to 65534 ohms
stores 10 most recent faults
8 channels; same parameters as for analog outputs available
per cycle / per second / per minute / every 5, 10, 15, 20, 30, or
60 minutes
pickup/trip/dropout, control/alarm event, logic input, manual
command, or continuous
0 to 100%
2 to 16 events with 2048 to 256 samples of data respectively
(4096 if continuous)
overcurrent trips.
SPECIFICATIONS
2 - 17