Operation; If The Vacufuse Ii Self-Resetting Interrupter; Is Found Open - S&C VacuFuse II Instruction Sheet

If the VacuFuse II Self-Resetting Interrupter Is
Found Open
WARNING
The VacuFuse II Self-Resetting Interrupter is designed
to protect distribution transformers from internal and
external fault current . A VacuFuse II Self-Resetting
Interrupter found in the Open and Drop Out position
should not be closed using the OPEN/CLOSE lever
until the cause of the fault current has been determined
and repaired . Closing without repairing the fault could
result in equipment damage, injury, or death .
After responding to an overcurrent event, the VacuFuse
II interrupter's vacuum interrupter will open and the
POSITION indicator will show a green target. If the over-
current event persists after the reclosing event, the unit
will lock out and drop out from the cutout mounting.
Follow these steps if the VacuFuse II Self-Resetting
Interrupter has operated and is in the Open and Drop
Out position:
Remove the
STEP 1.
Interrupter from its mounting, if required by
utility practice, following the steps in the
"Removing the VacuFuse II Interrupter from
the Cutout Mounting" section starting on
page 18.
Determine and resolve the cause of the fault.
STEP 2.
STEP 3. After the cause of the fault has been determined
and after any necessary repairs have been
completed, install the VacuFuse II Self-
Resetting Interrupter and close it into the
mounting following the steps described in the
"Installation" section starting on page 9.
VacuFuse II Self-Resetting

Operation

S&C Instruction Sheet 466-500 13