S&C IntelliRupter PulseCloser Manual Download Page 40

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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

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—