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: select the
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)
Negative Sequence
The
Negative Sequence
element will trip the IntelliRupter fault interrupter if 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
setting.
Negative Sequence Check box—
Select this box to configure the
Negative Sequence
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: 0.001)
Time Adder—
This is the time adder 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. 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 8-kV models are limited to 12,500 amps maximum.
90 S&C Instruction Sheet 766-530
Protection Setup
