S&C IntelliRupter PulseCloser Manual page 121

Ready
If Loop Restoration mode is in the Ready state when a triggering event occurs,
automatic restoration will proceed. The Ready state is entered and maintained when these
conditions are met:
• Loop Restoration is in the Enabled setting, both on the Operation screen and for the
presently active general profile.
• The IntelliRupter fault interrupter is in the Closed position and voltage is present on
the X and Y terminals if the general profile is configured in the Normally Closed mode.
• The IntelliRupter fault interrupter is in the Open position and voltage is present on
the X and Y terminals if the general profile is configured in the Normally Open mode
and the IntelliRupter fault interrupter is not in the Lockout state.
• The OPEN-CLOSE-READY lever is in the Ready position (only required for a
normally open IntelliRupter fault interrupter).
• A general profile is operative. For example a Hot Line Tag mode is not applied.
• An Error state is not active.
• If Overcurrent, Voltage, and Frequency elements are timing or reset, the Ready
state will still be active.
Timing
The Timing indicator shows when Loop Restoration Timers are running. When the
Timing mode is indicated, the IntelliRupter fault interrupter is testing, and some of the
conditions listed above for the Ready state may not be valid.
Reconfigured
Loop Restoration Reconfigured status is indicated when:
• An IntelliRupter fault interrupter in a Normally Closed state becomes open due to Loop
Restoration mode.
• An IntelliRupter fault interrupter in a Normally Closed state is closed but is serving
load in the opposite direction because of Loop Restoration mode.
• An IntelliRupter fault interrupter in a Normally Open state becomes closed because
of Loop Restoration mode.
Enable/Disable Loop Restoration
The Loop Restoration mode can be enabled or disabled by a SCADA command or
with the Operation screen. To enable Loop Restoration mode, click on the Loop
Restoration button and select Enabled mode. To disable Loop Restoration mode,
click on the Loop Restoration button and select Disabled mode.
Normally Open IntelliRupter Fault Interrupter
With Loop Restoration mode in the Ready state, an IntelliRupter fault interrupter in a
Normally Open state monitors both the X and Y sides for loss of voltage. For the timers
to start voltage must be present on one side. When the voltage drops on the other side,
the Maximum Time Allowed for Restoration Timer starts when the voltage is below
the Source Voltage Indication settings, and the Time Delay Before First Test Timer
starts when the voltage is below the Backfeed Voltage Level setpoint.
Loop Restoration
S&C Instruction Sheet 766-530 121