S&C IntelliRupter PulseCloser Manual page 123

• When the configured number of close attempts has been tried and either a PulseClosing
Technology operation detected a fault or a Close operation tripped because of a fault,
the IntelliRupter fault interrupter remains open and goes to the Lockout state, all
Loop Restoration Timers are reset, and the Loop Restoration mode is disabled.
• If Loop Restoration mode is taken out of Ready state, all timers associated
with loop restoration are reset but do not automatically change the Open /
Close position of the IntelliRupter fault interrupter. The IntelliRupter fault interrupter
state is unknown because it could have been closed and timing or open during an open
time interval at the time the Ready conditions became unsatisfied.
• To restore the Loop Restoration mode Ready state, the IntelliRupter fault
interrupter must be manually opened with the OPEN/CLOSE/READY lever, Wi-Fi, or
SCADA command, and the Loop Restoration mode must be enabled with a Wi-Fi or
SCADA command.
• When the Automatic Enable of Loop Restoration for Manual Lever Open mode
is selected, the Wi-Fi or SCADA command to re-enable the Loop Restoration mode
is not necessary. When the IntelliRupter fault interrupter is manually opened, it will
go to the Ready state if the other conditions for the Loop Restoration mode Ready
state have been satisfied.
The Loop Restoration Test sequence follows this procedure:
• When there is no voltage on both sides and a Closing Profile command is
initiated (The command is rejected, and the timers and sequence continue as if the
close attempt detected a fault.)
• When a Closing Profile command is blocked because of a Sync Check result
(The timers and sequence continue as if the close attempt detected a fault.)
• When the IntelliRupter fault interrupter is in the Open state and voltage returns
to both the X and Y sides or voltage is lost on both the X and Y sides (The Loop
Restoration Test sequence is suspended and the Maximum Time Allowed for
Restoration Timer continues. When voltage returns to one of the terminals, the test
sequence is resumed. When the Maximum Time Allowed for Restoration Timer
expires, the Loop Restoration mode remains enabled and all timers associated with
loop restoration are reset. When the IntelliRupter fault interrupter is in the Open state,
it may enter the loop restoration Ready state if all other conditions have been met.)
• A manual command to change profiles by either the OPEN/CLOSE/READY lever, Wi-Fi,
or SCADA that occurs during the test sequence will take loop restoration out of the
Ready condition, and all timers are stopped and reset. Manual actions are required
to return the Loop Restoration mode to the Ready state.
Normally Closed IntelliRupter Fault Interrupter
When Loop Restoration mode is in the Ready state, an IntelliRupter fault interrupter
in a Normally Closed state has all Overcurrent, Voltage, and Frequency protection
elements active, the same as it would without the Loop Restoration mode active.
Loop Restoration mode is not activated when an Overcurrent Trip or Lockout
state occurs.
The Time Limit for Loop Restoration Timer starts when any of the enabled Volt-
age Trip or Sectionalizing elements in the active general profile trip.
Loop Restoration
S&C Instruction Sheet 766-530 123