S&C IntelliRupter PulseCloser - Page 49

Reset—Select the reset method for the inverse curve from the drop-down list:
D/T (Denite Time) or E/M (Electromechanical) mode.
Reset Time—When the Denite Time reset mode is selected, enter the time delay for
the reset (in seconds). (Range: 0.000-600.000; Step: 0.001)
Denite Time 1 Min. Trip—This is the current (in primary amperes) at which the
Denite 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.
Denite Time 1 Min. Time—This is the time delay (in seconds) after which the Denite
Time 1 element trips. (Range: 0.000-600.000; Step: 0.001)
Denite Time 2 Min. Trip—This is the current (in primary amperes) at which the
Denite 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.
Denite Time 2 Min. Time—This is the time delay (in seconds) after which the Denite
Time 2 element trips. (Range: 0.000-600.000; Step: 0.001)
Sensitive Earth
The Sensitive Earth element trips the IntelliRupter fault interrupter when the computed
residual of the three-phase elements exceeds the pickup value for the time value set by
the Inverse Curve or the Denite Time settings.
Sensitive Earth Check box—Select to congure 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 Denite Time settings
will be used.
Min. Trip—This is the current (in primary amperes) at which the Inverse Curve begins
timing. (Range: 3.0-16,000.0; Step: 0.1. When the Voltage Supervised Sensitive Earth
element is selected, Range: 1.0-16,000.0, Step: 0.1) The stated maximum is for 15-kV
IntelliRupter fault interrupters; 27-kV and 38-kV are limited to 12,500 amps maximum.
Min. Time—This is the time (in seconds) dening the fastest response of the inverse
curve portion of the TCC curve. (Range: 1.000-6000.000; Step: 0.001)
Time Mult—This is the time modier for the inverse curve. (Range: 0.01-15.00; Step: 0.01)
Time Adder—This is the time modier for the inverse curve. (Range: -10.000-100.000;
Step: 0.001)
Low Current Cutoff—This is the current (in primary amperes) at which the TCC curve
begins timing. (Range: 3.0-16,000.0; Step: 0.1. When the Voltage Supervised Sensitive
Earth element is selected. (Range: 1.0-16,000.0; Step: 0.1) The stated maximum is for 15-kV
IntelliRupter fault interrupters; 27-kV and 38-kV are limited to 12,500 amps maximum.
Reset—The reset method for the inverse curve is congurable for D/T (Denite Time) or
T/A (Time Accumulation) mode. The Time Accumulation mode times when current is
above the Minimum Trip value and does not time when current is below the Minimum
Trip value. The timer continues to run until either the SEF element trips or the element
does not pick up for the duration of the user-specied SEF Element Reset Time parameter
and the element resets. The Time Accumulation setting is the default.
S&C Instruction Sheet 766-530 49
Protection Setup