SPECIFICATIONS
9-1
Technical Specifications
Phase Overcurrent Protection:
Timed overcurrent pickup:
Range 25%-250% of CT in steps of 1%.
Time dial: 32 selections.
Instantaneous overcurrent pickup:
Range 1 to 18 times phase pickup, in steps of 0.5.
Instantaneous trip delay:
No delay after first cycle of detected overcurrent if “Inst”
is selected. Otherwise, 1 to 40 cycles delay after first
cycle of detected overcurrent.
Ground Overcurrent Protection:
Timed overcurrent pickup:
Range 5% to 100% of CT in steps of 1%.
Time dial: 32 selections.
Instantaneous overcurrent pickup:
Range 1 to 7 times ground pickup, in steps of 0.5.
Instantaneous trip delay:
No delay after first cycle of detected overcurrent if “Inst”
is selected. Otherwise, 1 to 40 cycles delay after first
cycle of detected overcurrent.
Phase and Ground Timed Overcurrent Curves:
Normal Inverse.
Very Inverse.
Extremely Inverse.
Moderately Inverse.
IEC A.
IEC B.
IEC C.
Custom Curve. 79 Breakpoints, user programmable.
Timing Accuracy for Phase and Ground:
Instantaneous: Less than three cycles.
Timed: current ≥1.5 × pickup: ±3% of table value, ±0.1
seconds, whichever is greater.
current <1.5 × pickup: ±10% of table value.
Measurements:
Response: RMS Responding.
Display accuracy for load currents:
± 3% from 25-100% CT primary.
Bandwidth: 0-120 Hz
Display update rate:
Greater than once per 2 seconds.
Phase Current Inputs:
CT secondary: 1 Amp or 5 Amp.
Saturation: 20 Times CT.
CT primary: 10-5000 Amp in 5 Amp steps.
CT burden: Less than 0.2 VA per phase at 100% of CT.
CT rating: 15 Amps continuous
Momentary: 20 × CT input rating for 3 seconds
Ground Current Input:
CT secondary: 1 Amp or 5 Amp.
Saturation: 20 times the programmed overcurrent pickup level.
CT primary: 10-5000 Amps in 5 Amp steps.
CT burden: Less than 0.2 VA per phase at rated CT secondary
current.
CT rating: 15 Amps continuous.
Momentary: 20 × CT input rating for 3 seconds
Phase and Ground Overcurrent Alarm.
Alarm level: 0.5 to 3.0 times overcurrent pickup in steps of 0.1.
Time delay: 1 to 255 seconds in steps of one second.
Voltage Inputs:
Inputs (WYE, DELTA, or DELTA/WYE):
48 to 240
VT burden: less than 0.2 VA at rated input.
Display accuracy:± 3% of nominal input.
Display: RMS values for Va-b, Vb-c, Vc-a, (Va-n, Vb-n, Vc-n line to
neutral connection).
Display update rate:
Greater than once per 3 seconds.
Overvoltage Alarm and Trip:
Pickup: 101 to 125% in steps of 1%.
Delay: 0.1 to 25.5 seconds in steps of 0.1 seconds.
Undervoltage Alarm and Trip:
Pickup: 30 to 100% nominal, in steps of 1%.
Delay: 0.1 to 25.5 seconds in steps of 0.1 seconds.
Frequency Measurement:
Accuracy: ± 0.1 Hz.
Measured: across Phase A.
Output Contacts:
10 Amp/250 VAC resistive.
10 Amp/30 volt DC resistive. - 20 Amp Make and Carry
0.4 Amp/125 Volt DC (L/R = 7mS).
Maximum voltage 380VAC/125VDC.
10 Amp continuous, maximum voltage 300 VDC.
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