1 INTRODUCTION
g
GE Power Management
4
1.4 Technical Specifications
Phase Current Inputs
conversion: calibrated RMS
range: 0.05 to 12
×
phase CT primary amps setpoint
full scale: 12
×
phase CT primary amps setpoint
accuracy: ±0.5% of full scale (0.05 to 2 X phase CT primary amps setpoint)
±1.0% of full scale (over 2 X phase CT primary amps setpoint)
Ground Fault Current Input
conversion: calibrated RMS
range: 0.1 to 1.0 X G/F CT primary amps setpoint (5 Amp secondary CT)
1.0 to 10.0 amps (2000:1 CT)
full scale: 1
×
G/F CT primary amps setpoint (5 Amp secondary CT)
10 amps (2000:1 CT)
accuracy: ±4% of G/F CT primary amps setpoint (5 Amp secondary CT)
± 0.3 amps primary (2000:1 CT)
Overload Curves
trip time accuracy: ±1 sec. up to 13 sec.
±8% of trip time over 13 sec.
detection level: ±1% of primary CT amps
Unbalance
display accuracy: ±2 percentage points of true negative sequence unbalance (In/Ip)
Relay Lock-out Time
accuracy: +/- 1 minute with control power applied
+/- 20% of total lock-out time with no control power applied
Trip/Alarm Delay Times
accuracy: ±0.5 sec. or 2% of total time, whichever is greater with the exception of:
1. "INST."setpoints: less than 50 msec.
2. Ground Fault 0.5 Second delay: ±150 msec.
3. Ground Fault 250 msec delay: +75 msec, -150 msec.
Phase Reversal Trip Time
relay response time: within 3.5 sec. of motor start attempt
Differential Relay Input
relay response time: 100 msec. maximum (contact closure to output relay activation)
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