S&C IntelliRupter PulseCloser Manual page 48

Protection Setup
48 S&C Instruction Sheet 766-530
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—When 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.
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)
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.
Definite Time 2 Min. Time—This is the time delay (in seconds) after which the Definite
Time 2 element trips. (Range: 0.000-600.000; Step: 0.001)
Ground Overcurrent Alert
This feature is based on the Ground Overcurrent Trip element, but it is not a protection
element and will not lead to any IntelliRupter fault interrupter action. Instead, it is used
to notify the user via the Operation screen and SCADA that an overcurrent condition
exists. To enable this feature check the Ground Alert check box and enter the current
threshold. (Range: 6-16,000; Step: 1)
Negative Sequence
The Negative Sequence element trips the IntelliRupter fault interrupter when the
negative-sequence component of the three-phase elements exceeds the pickup value for
the time value set by the Inverse Curve or the Definite Time settings.
Negative Sequence Check box—Select to configure this element.
Inverse Segment—Select 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
will be 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.