GE 750 User Manual

1-
8
750/760 Feeder Management Relay GE Power Management
1.2 TECHNICAL SPECIFICATIONS 1 PRODUCT OVERVIEW
1
1.2.3 MEASURED PARAMETERS
(Accuracies based on less than 2 x CT and 50 to 130 V inputs)
* Full Scale = 2 x CT @ 1 x VT Full Scale x
√
3
GENERAL
The harmonic components of current and voltage are removed from the input voltage and current parameters,
so all relay measurements based on these quantities respond to the fundamental component only. To minimize
errors, the A/D process utilizes a sampling rate that is automatically adjusted to be 16 samples per power fre-
quency cycle when a measurable voltage is available. To prevent overreaching of overcurrent elements, a dig-
ital filter removes the transient DC component of currents.
CURRENT
Phase A RMS Current Phasor
Phase B RMS Current Phasor
Phase C RMS Current Phasor
% of Load-To-Trip
Accuracy: ± 0.5% of full scale
VOLTAGE
A–N (A–B) RMS Voltage Phasor
B–N (B–C) RMS Voltage Phasor
C–N (C–A) RMS Voltage Phasor
Accuracy: ± 0.25% of full scale
FREQUENCY
A-N (A-B) Bus & Line Voltage
Range: 16 to 90 Hz
Accuracy: ± 0.02 Hz
SYMMETRICAL COMPONENTS
Current Level Accuracy:± 1.5% of full scale
Voltage Level Accuracy:± 0.75% of full scale
Current & Voltage
Angle Accuracy: ± 2°
3
Φ
POWER FACTOR
Range: 0.00 Lag to 1.00 to 0.00 Lead
Accuracy: ± 0.02
3
Φ
REAL POWER
Range: –3000.0 to 3000.0 MW
Accuracy: ± 1% of full scale
3
Φ
REACTIVE POWER
Range: –3000.0 to 3000.0 Mvar
Accuracy: ± 1% of full scale *
3
Φ
APPARENT POWER
Range: –3000.0 to 3000.0 MVA
Accuracy: ± 1% of full scale *
WATT-HOURS
Range: –2.1 x 10
8
to 2.1 x 10
8
MWh
Accuracy: ± 2% of full scale * per hour
VAR-HOURS
Range: –2.1 x 10
8
to 2.1 x 10
8
MVar
Accuracy: ± 2% of full scale * per hour
DEMAND
Phase A/B/C Current
Range: 0 to 65535 A
3Φ Real Power
Range: –3000.0 to 3000.0 MW
3Φ Reactive Power
Range: –3000.0 to 3000.0 Mvar
3Φ Apparent Power
Range: –3000.0 to 3000.0 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.
Accuracy: ± 2% of full scale *

GE 750 Specifications

General

Brand	GE
Model	750
Category	Relays
Language	English