S&C IntelliRupter PulseCloser Manual page 79

Protection Setup
Open-Source Voltage Threshold
This is the percentage of system voltage below which a Trip event will occur.
(Range: 5-100; Step: 1; Default: 20)
Open-Source Current Restraint Threshold
This is the current (in primary amperes) above which a Trip event is prevented.
(Range: 0-16000; Step: 1; Default: 10) The stated maximum is for 15-kV IntelliRupter fault
interrupters; 27-kV and 38-kV models are limited to 12,500 amps maximum. When set
to 0, the current restraint is disabled.
Open-Source Reset Voltage Threshold
This is the percentage of system voltage above which the Open-Source Voltage element
is reset. (Range: 5-100; Step: 1; Default: 80)
Open-Source Time to Trip
This is the time (in seconds) the Open-Source Voltage element must be below its
threshold for a Trip event to occur. (Range: 0.00-600.00; Step: 0.01; Default: 30.00)
Open-Source Reset Time
This is the time (in seconds) a reset-voltage level must be present for the
Open-Source Voltage element to reset. (Range: 0.00-600.00; Step: 0.01; Default: 1.00)
Single-Phasing Protection and Sectionalizing
Specify the Yes, No (default), VS-SEF, or IntelliTeam SG option or this element. The
IntelliTeam SG setting causes this element to only be active when the IntelliTeam SG
system is in the Ready mode.
This is an overvoltage element and it uses zero-sequence and negative-sequence
voltage to determine when it should trip. The two voltage elements are current-supervised
and use zero-sequence and negative-sequence current to determine when the overvoltage
elements should accumulate time. If zero- or negative-sequence currents are above the set
thresholds, the respective zero- or negative-sequence voltage elements do not accumulate
time. This gives priority to the Overcurrent elements during a high-current condition.
Zero Sequence Voltage Threshold
This is the percentage of system voltage above which a Trip event will occur.
(Range: 1-100; Step: 1; Default: 15) This setting always uses Phase-to-Ground mode
even when the Voltage Reporting setpoint on the Setup>General>Site Related>System
screen is set to Phase-to-Phase mode. For example, when the System Phase-to-Phase
Voltage setpoint on the Setup>General>Site Related>System screen is set to 12.47 kV
(7.2 kV phase-to-ground), the Zero Sequence Voltage Threshold setpoint is set to
15%, and the Residual X-Side and Y-Side Voltage (3 V0) is 1,100 volts, the Zero Sequence
Voltage Threshold setting has been exceeded (1,100/7,200 = 15.3%).
Zero Sequence Current Restraint Threshold
This is the current (in primary amperes) above which a Trip event is prevented.
(Range: 10-16,000; Step: 1; Default: 50) The stated maximum is for 15-kV IntelliRupter
fault interrupters; 27-kV and 38-kV models are limited to 12,500 amps maximum.
Note: The current restraint is effectively disabled when set to 16000. This would be
the recommended setting for DER applications where the intent is to open as fast as
possible on voltage loss.
S&C Instruction Sheet 766-530 79