• 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.
S&C Instruction Sheet 766-530 123
Loop Restoration