The
Loop Restoration Test
sequence starts if voltage returns on one side (X or Y), as
determined by a
Good Source Voltage
indication, before the
Maximum Time Allowed
for Restoration
Timer
expires.
When the
Maximum Time Allowed for Restoration
Timer
expires, the IntelliRupter
fault interrupter stays in the
Open
state, goes to the
Lockout
state, and disables
Loop
Restoration
mode.
• To return to the
Loop Restoration
mode
Ready
state, manually close the IntelliRupter
fault interrupter with the OPEN/CLOSE/READY lever, a Wi-Fi command, or a SCADA
command. Then,
Loop Restoration
mode must be placed in the
Enabled
state with
a Wi-Fi or a SCADA command.
• If
Automatic Enable of Loop Restoration for Manual Lever Close
mode
(applicable to Normally Closed configuration) has been configured, then the Wi-Fi or
SCADA command to enable
Loop Restoration
mode is not necessary.
Normally-Closed Loop Restoration Test Sequence
The
Loop Restoration Test
sequence is configured on the
Setup>Restoration>Loop
screen and is used by both Normally Open and Normally Closed configurations.
The
Normally Closed Loop Restoration Test
sequence follows this process:
• When good source voltage returns on one side, Closing Attempt #1 starts its
closing profile.
• If there is no voltage when a closing profile starts, the closing profile is rejected, and
the timers and sequence continue as if the close attempt detected a fault.
• When a
PulseClosing Technology
operation detects a fault or the
Close
operation
trips because of a fault, then Open Time Interval #1 will expire and the closing profile
specified for Closing Attempt #2 starts. This sequence continues for the configured
number of closing attempts.
• The IntelliRupter fault interrupter will go to the
Lockout
state if a
Voltage
,
Sectionalizing
, or
Frequency
element trips during the
Loop Restoration Test
sequence.
• When a close attempt is successful, the closing profile is replaced by the active general
profile.
Loop Restoration
mode goes to the
Disabled
state, and protection functions
are normal.
• When current-flow direction has not changed,
Loop Restoration
mode will enter the
Ready
state if all
Ready
state conditions have been satisfied.
• When current flow changes direction,
Loop Restoration
mode is disabled, and the
reported
Loop Restoration
mode is in the
Reconfigured
state.
• When the configured number of closing attempts has been tried and either a
PulseClosing Technology
operation detects a fault or a
Close
operation has resulted
in a trip because of a fault, the IntelliRupter fault interrupter remains open and goes to
the
Lockout
state, all
Loop Restoration
Timers
are reset, and
Loop Restoration
mode goes to the
Disabled
state.
• If
Loop Restoration
mode is taken out of the
Ready
state by a manual operation, by
applying the
Hot Line Tag
mode, or by disabling
Loop Restoration
mode, all timers
associated with
Loop Restoration
mode are reset but do not automatically change
the
Open/Close
position of the IntelliRupter fault interrupter.
124 S&C Instruction Sheet 766-530
Loop Restoration