S&C IntelliRupter PulseCloser Manual page 40

Protection Setup
40 S&C Instruction Sheet 766-530
Phase Overcurrent
The Phase Overcurrent element trips the IntelliRupter fault interrupter when current
on one or more phases exceeds the pickup value for the selected Inverse Curve or
Definite Time settings. See Figure 30 on page 41.
Phase Check box—Select to configure this element.
Inverse Segment—Select the segment from the drop-down list of inverse curve names
or select the None option. When the None option is selected, only the Definite Time
settings are used.
Min. Trip—This is the current (in primary amperes) at which the inverse curve begins
timing. (Range: 6-16,000; Step: 1) The stated maximum is for 15-kV IntelliRupter fault
interrupters; 27-kV and 38-kV models are limited to 12,500 amps maximum.
Min. Time—This is the time (in seconds) defining the fastest response of the inverse-
curve portion of the TCC curve. (Range: 0.000-100.000; Step: 0.001)
Time Mult—This is the time multiplier for the inverse curve. (Range: 0.01-15.00;
Step: 0.01)
Time Adder—This is the time adder for the inverse curve. (Range: -10.000-100.000;
Step: 0.001)
Low Cutoff—This is the current (in primary amperes) at which the TCC curve begins
timing. This value must be equal to or greater than the lowest pickup value of the inverse
curve, the Definite Time 1 element, and the Definite Time 2 element. (Range: 6-16,000;
Step: 1) The stated maximum is for 15-kV IntelliRupter fault interrupters; 27-kV and 38-kV
models are limited to 12,500 amps maximum.
Reset—Select the reset method for the inverse curve from the drop-down list:
D/T (Definite Time) or E/M (Electromechanical) mode.
Reset Time—If the Definite Time reset mode is selected, enter the time delay for the
reset (in seconds). (Range: 0.000-600.000; Step: 0.001)
Definite Time 1 Min. Trip—This is the current (in primary amperes) at which the
Definite Time 1 element picks up. (Range: 6-16,000; Step: 1) The stated maximum is for
15-kV IntelliRupter fault interrupters; 27-kV and 38-kV models are limited to 12,500 amps
maximum. This value must be greater than the Minimum Trip current setting, greater
than the Low Current Cutoff setting, less than or equal to the interrupting rating of
the device, and smaller than the High Current Cutoff setting.
Definite Time 1 Min. Time—This is the time delay (in seconds) after which the Definite
Time 1 element trips. (Range: 0.000-600.000; Step: 0.001) This value must be less than
or equal to the time on inverse curve segment at Definite Time 1 current. Setting this
time greater than the inverse curve segment will result in a slower response than would
otherwise result from the inverse curve segment.
Definite Time 2 Min. Trip—This is the current (in primary amperes) at which the
Definite Time 2 element picks up. (Range: 6-16,000; Step: 1) The stated maximum is
for 15-kV IntelliRupter fault interrupters; 27-kV and 38-kV models are limited to 12,500
amps maximum. This value must be greater than Definite Time 1 current setting, less
than or equal to the interrupting rating of the device, and smaller than the High Current
Cutoff setting.
Definite Time 2 Min. Time—This is the time delay (in seconds) after which the Definite
Time 2 element trips. This value must be less than Definite Time 1 time setting. (Range:
0.000-600.000; Step: 0.001)