GE Multilin 750/760 Feeder Management Relay 2-9
2 INTRODUCTION 2.2 SPECIFICATIONS
2
REVERSE POWER (IF ENABLED)
Pickup level: 0.015 to 0.600 × rated power
Dropout level: 94 to 95% of pickup
Reset time: less than 100 ms
Time delay: see 3F Real Power metering
Timing accuracy: ±200 ms
(includes Reverse Power pickup time)
2.2.5 MONITORING ELEMENTS
PHASE/NEUTRAL CURRENT
Pickup level: 0.05 to 20.00 × CT in steps of 0.01
Dropout level: 97 to 98% of pickup
Time delay: 0 to 60000 s in steps of 1 (Definite Time)
Level accuracy: per current input
Timing accuracy: ±100 ms
POWER FACTOR
Required voltage: >30% of nominal in all phases
Pickup level: 0.50 lag to 0.50 lead in steps of 0.01
Dropout level: 0.50 lag to 0.50 lead in steps of 0.01
Time delay: 0 to 60000 s in steps of 1 (Definite Time)
Level accuracy: ±0.02
Timing accuracy: ±100 ms
ANALOG IN THRESHOLD
Pickup level: 0 to 65535 units in steps of 1
Dropout level: 2 to 20% of Pickup
(programmable, under or over)
Time delay: 0 to 60000 s in steps of 1
Level accuracy: ±1%
Timing accuracy: ±100 ms
ANALOG IN RATE
Pickup level: –1000 to 1000 mA/hr in steps of 0.1
Dropout level: 97 to 98% of Pickup
Time delay: 0 to 60000.0 s in steps of 1
Level accuracy: ±1%
Timing accuracy: ±100 ms
OVERFREQUENCY
Required voltage: >30% of nominal in Phase A
Pickup level: 20.01 to 65.00 Hz in steps of 0.01
Dropout level: Pickup – 0.03 Hz
Time delay: 0.0 to 6000.0 s in steps of 0.1
Level accuracy: ±0.02 Hz
Timing accuracy: ±34 ms at 60 Hz; ±40 ms at 50 Hz
FAULT LOCATOR
Range: –327.68 to 327.66 km/miles
0 to 65534 ohms
Memory: stores the 10 most recent faults
DATA LOGGER
Data channels: 8 channels; same parameters as for
analog outputs available
Sample rate: per cycle / per second / per minute /
every 5, 10, 15, 20, 30, or 60 minutes
Trigger source: pickup/trip/dropout, control/alarm event,
logic input, manual command, or contin-
uous
Trigger position: 0 to 100%
Storage capacity: 2 to 16 events with 2048 to 256 samples
of data respectively (4096 if continuous)
TRIP COUNTERS
Accumulates all ground, sensitive ground, neutral, negative
sequence, and phase overcurrent trips.
DEMAND
Demand accuracies are based on less than 2 × CT and
50 to 130 V inputs.
Measured values: Phase A/B/C current (A), 3Φ real power
(MW), 3Φ reactive power (Mvar),
3Φ apparent power (MVA)
Measurement type:
Thermal Exponential, 90% response time (programmed):
5, 10, 15, 20, 30, or 60 min.
Block Interval / Rolling Demand, time interval (programmed):
5, 10, 15, 20, 30, or 60 min.
Block Interval with Start Demand Interval Logic Input pulses
Amps pickup level: 10 to 10000 in steps of 1
MW pickup level: 0.1 to 3000.0 in steps of 0.1
Mvar pickup level: 0.1 to 3000.0 in steps of 0.1
MVA pickup level: 0.1 to 3000.0 in steps of 0.1
Level accuracy: ±2%
VT FAILURE
Programmable to inhibit dependent features.
BREAKER FAILURE TO OPERATE
Time delay: 30 to 1000 ms in steps of 10
Timing accuracy: 0 to 20 ms error
ACCUMULATED ARCING CURRENT
Pickup level: 1 to 50000 kA
2
-seconds in steps of 1
Start delay: 0 to 100 ms in steps of 1
TRIP / CLOSE COIL MONITORS
Detect open trip and close circuits.
PULSED OUTPUT
Pulsed output is 1 second on time and one second off time after
the programmed interval.
NOTE
Courtesy of NationalSwitchgear.com
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