20 S&C Instruction Sheet 466-500
Troubleshooting
Table 1.
Condition
Description
Action
The VacuFuse II interrupter’s vacuum
interrupter is in the
Open position, and
the VacuFuse II interrupter is dropped out
and cannot be closed back into the cutout
mounting .
The VacuFuse II interrupter has reached the
end of its life .
Remove the VacuFuse II interrupter from the cutout
mounting and return it to S&C Electric Company
for service .
The vacuum interrupter cannot be closed
using the VacuFuse II interrupter’s OPEN/
CLOSE lever .
The VacuFuse II interrupter is in
Abnormal
mode .
Remove the VacuFuse II interrupter from its cutout
mounting and return it to S&C Electric Company
for service .
The vacuum interrupter is in the
Open
position, but the VacuFuse II interrupter
has not dropped out of the cutout
mounting .
Situation 1
The VacuFuse II Self-Resetting Interrupter
does not have enough power to drop out . The
CHARGING LED blinks with the presence of
voltage in the cutout mounting .
Situation 1 Action
Wait 1 minute after receiving power and the unit
will drop out by itself .
Situation 2
The VacuFuse II Self-Resetting Interrupter is
stuck in the cutout mounting . The CHARGING
LED blinks with the presence of voltage in the
cutout but after 1 minute the unit does not drop
out . The VacuFuse II Self-Resetting Interrupter
will repeatedly attempt to drop out . If it does
not successfully drop out within 8 hours, the
unit will go into an
End-of-Life state .
Situation 2 Action
To prevent premature end of life, attach a Talon™
Handling Tool or a distribution prong to a short
hotstick . Using the straight prong of the Talon tool
or a distribution prong, pull the pull-ring forward
until the VacuFuse II interrupter disengages from
the
Closed into Cutout position . A swift, firm pull
will be required .
Situation 3
The VacuFuse II Self-Resetting Interrupter
is stuck in the cutout mounting in
Abnormal
mode
Situation 3 Action
Check for voltage presence in the cutout mounting .
If voltage is present in the cutout mounting, and
the CHARGING LED is not blinking,
Abnormal
mode is confirmed . Remove the VacuFuse
II interrupter from its cutout mounting using
Loadbuster®—The S&C Loadbreak Tool . Then,
install a new VacuFuse II interrupter as described
in the “Installation” section starting on page 9 .
If there is no voltage present in the cutout
mounting, wait for power to be restored in the
cutout mounting and test again for any of the three
possible situation conditions .
Removing the VacuFuse II Interrupter from
the Cutout Mounting Using Loadbuster®—
The S&C Loadbreak Tool
If the VacuFuse II Self-Resetting Interrupter is in its cutout
mounting with the vacuum interrupter in the
Closed
position and operating the OPEN/CLOSE lever to the
Open
position does not work, or the VacuFuse II interrupter is
to be removed from its cutout mounting in the
Closed
position for any other reason, it may be safely removed
using S&C’s Loadbuster tool. Following an opening opera-
tion with the Loadbuster tool, the VacuFuse II interrupter
can be lifted out of the mounting with gloved hands.
WARNING
DO NOT attempt to open a VacuFuse II Self-Resetting
Interrupter that is in the
Closed position without using
a loadbreak tool such as S&C’s Loadbuster tool . An
arc started by opening a VacuFuse II Self-Resetting
Interrupter under load without a loadbreak tool can
cause equipment damage, serious injury, or death .
WARNING
DO NOT attempt to use a Loadbuster tool to open a
VacuFuse II Self-Resetting Interrupter while climbing
the pole . Engagement of a Loadbuster tool in this
position is difficult and may result in improper opening
operation, leading to arcing, faults, equipment
damage, serious injury, or death .
