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.
S&C Instruction Sheet 766-530 121
Loop Restoration