Normal State
The Normally Open state is for an IntelliRupter fault interrupter at the tie point between
two feeders. The Normally Closed state is for any other IntelliRupter fault interrupter on
the feeder. This parameter is not available when the Loop Restoration mode is disabled.
Protection
Choose the Voltage Trip or Sectionalizing element for triggering the Loop-Restoration
mode. The Voltage Trip element is usually selected. This parameter is only available
when the Closed Normal state and the Loop Restoration mode are enabled.
Good Frequency to Close
When the Yes option is chosen for the Good Frequency to Close mode, a Loop
Restoration Close command will be blocked if the frequency is below the active Under
Frequency Threshold for the congured Under Frequency Minimum Time to Detect
setpoint. When the No setting is chosen for the Good Frequency to Close mode, a Loop
Restoration Close command will not be blocked.
The Yes option is chosen for the Under Frequency Enabled setpoint on the
Setup>Protection>General Profiles>Voltage Frequency Sectionalizing>Frequency
Trip Section screen. The Loop Restoration mode must be manually enabled after the
Low-Frequency condition has cleared.
Loop Restoration Test Sequence Section
Closing Profile 1 and Closing Profile 2
The closing prole names are shown here for reference. They are congured on the
Setup>Protection>Closing Prole 1 or 2>Closing Prole 1 or 2>Current>Closing
Prole Main screen.
Add Test and Remove Test buttons
Select the number of loop-restoration tests to be performed. At least one test is always
performed and up to four tests can be congured. Each click on the Add Test button
adds one test. Each click on the Remove Test button removes one test.
Close Option—Tests 1-4
Select the specic closing prole to be used for each test. Choose from the Closing
Prole 1 or Closing Prole 2 options.
Delay (seconds)—Tests 2-4
Specify the delay in seconds between each test. (Minimum: 1.80 for Time 1, 10.00 for
Time 2, and 30.00 for Time 3; Maximum: 655.00 seconds; Default: the minimum value;
Increment: 0.01)
S&C Instruction Sheet 766-530 117
Loop Restoration
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