Ground/Neg-Seq Trip
When enabled, this function allows tripping caused by a
Ground Overcurrent
element
or a
Negative Sequence Overcurrent
element. A
Trip
operation is commonly blocked
when work will be performed on a line, resulting in a larger-than-normal load imbalance.
This function is a convenient way to block the configured
Ground Overcurrent
and
Negative Sequence Overcurrent
elements. This function does not activate a
Ground
Overcurrent
element or
Negative Sequence Overcurrent
element if it has not been
set in the active profile.
Test on Backfeed
This function establishes whether certain voltage conditions must be satisfied prior to
executing a specified test sequence after an initial trip. Test sequences are configured
on the
Setup>Protection>General Profile>Testing After Initial Trip
screen.
When enabled, the
PulseClosing Technology
or
Close Test
operation occurs regard-
less of whether there is system voltage present on both X and Y terminals, or only the X
or Y terminal of the IntelliRupter fault interrupter.
The
Test on Backfeed
mode is commonly disabled (blocked) for applications involving
distributed generation. In this instance, disabling the
Test on Backfeed
mode prevents
a
PulseClosing Technology
or
Close Test
after the initial trip until the distributed
generation has tripped offline.
When the
Test on Backfeed
mode is disabled, the IntelliRupter fault interrupter
waits for terminal X or Y voltage to fall below the
Backfeed Voltage Level
setting on
the
Setup>General>Site-Related>System
screen before proceeding with the specified
Testing After Initial Trip
sequence.
When system voltage is present on one terminal and the other terminal voltage remains
above the
Backfeed Voltage Level
setting for more than 5 minutes, the IntelliRupter
fault interrupter goes to
Lockout
mode.
When the
Test on Backfeed
mode is disabled, this function is only enforced when
all three poles are open and not in a
Pole Mismatch
state. For example, not during a
Single-Phase Trip
operation.
Circuit Testing
When enabled this function allows a
PulseClosing Technology
or
Close Test
operation
after an initial trip. When blocked, the IntelliRupter fault interrupter goes immediately
into
Lockout
mode after tripping.
Sensitive Earth Trip
When enabled, this function allows the IntelliRupter fault interrupter to trip because of
a
Sensitive Earth Overcurrent
element. This function does not activate a
Sensitive
Earth Overcurrent
element if one has not been set in the profile.
Single Phase Operation
When set to the
Block
mode, this function prevents the IntelliRupter fault interrupter
from performing a single phase operation event. This function does not activate
single phase operation event if it has not been set in the active profile.
For each of the command functions:
• Enter a command label that will display on the
Operation
screen.
• Enter an active label that will display on the
Operation
screen.
• Enter an inactive label that will display on the
Operation
screen.
S&C Instruction Sheet 766-530 27
General Setup
