Current; Voltage - GE 750 Instruction Manual

CHAPTER 2: INTRODUCTION
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL
that is automatically adjusted to be 16 samples per power frequency cycle when a
measurable voltage is available. To prevent overreaching of overcurrent elements, a digital
filter removes the transient DC component of currents.

CURRENT

Phasors:
% of load-to-trip accuracy: ±0.5% of full-scale

VOLTAGE

Phasors:
Accuracy:
FREQUENCY
Measured:
Range:
Accuracy:
SYMMETRICAL COMPONENTS
Current level accuracy:
Voltage level accuracy:
Current and voltage angle accuracy: ±2°
3Φ POWER FACTOR
Range:
Accuracy:
3Φ REAL POWER
Range:
Accuracy:
3Φ REACTIVE POWER
Range:
Accuracy:
3Φ APPARENT POWER
Range:
Accuracy:
WATT-HOURS
Range:
Accuracy:
VAR-HOURS
Range:
Accuracy:
DEMAND RANGE
Phase A/B/C current:
3Φ real power:
3Φ reactive power:
3Φ apparent power:
DEMAND MEASUREMENT
Thermal exponential, 90% response time (programmed):
Block interval / rolling demand, time interval (programmed):
Phase A RMS current
Phase B RMS current
Phase C RMS current
Phase A-N (A-B) voltage
Phase B-N (B-C) voltage
Phase C-N (C-A) voltage
±0.25% of full scale
A-N (A-B) bus and line voltage
16 to 65 Hz
±0.02 Hz
±1.5% of full scale
±0.75% of full scale
0.00 Lag to 1.00 to 0.00 Lead
±0.02
–3000.0 to 3000.0 MW
±1% of full scale
–3000.0 to 3000.0 Mvar
±1% of full scale
(see note above)
–3000.0 to 3000.0 MVA
±1% of full scale (see note above)
–2.1 × 108 to 2.1 108 MWh
×
±2% of full scale (see note above) per hour
–2.1 × 108 to 2.1
× 108 Mvarh
±2% of full scale (see note above) per hour
0 to 65535 A
–3000.0 to 3000.0 MW
–3000.0 to 3000.0 Mvar
–3000.0 to 3000.0 MVA
5, 10, 15, 20, 30, or 60 min.
5, 10, 15, 20, 30, or 60 min.
SPECIFICATIONS
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