10 S&C Instruction Sheet 466-500
Installation
Installing a VacuFuse II Interrupter into the
Cutout Mounting
WARNING
Provide training to line crews on the use of both a
hotstick and an extendostick before installing or
operating the VacuFuse II Self-Resetting Interrupter .
The VacuFuse II interrupter is different from other
cutout-mounted devices . Failure to properly handle
a VacuFuse II interrupter with a hotstick and/or an
extendostick may lead to serious injury or death .
Complete the following steps to install a VacuFuse II
interrupter into a cutout mounting:
STEP 1.
If using an existing S&C cutout mounting
or other approved cutout mounting:
Visually
inspect the cutout mounting for damage or
excessive wear, particularly in the upper and
lower contact areas. If ANY damage is visible,
replace the cutout mounting before proceeding.
DO NOT install and/or energize a VacuFuse II
Self-Resetting Interrupter into a damaged
cutout mounting.
If installing in a new S&C Cutout
Mounting:
For overhead pole-top style
VacuFuse II Self-Resetting Interrupters, attach
the mounting to its mounting bracket, as illus-
trated in Figure 4. A mounting bracket, suitable
for crossarm, pole, or wall mounting, is fur-
nished only if specified through the addition
of catalog number suffix “-B” or “-C” to the
VacuFuse II interrupter catalog number. Note
the placement of the external-tooth lockwasher
between the mounting bracket and the center
insert of the mounting. Pivot the mounting
bracket to a position that will provide maximum
ease of operation, and then securely tighten the
carriage-bolt nut.
STEP 2.
Make the electrical connections to the cutout
mounting. If aluminum conductors are used, be
sure to wire-brush them and apply a coating of
oxidation inhibitor before inserting them into
the connectors.
Carriage-bolt
Carriage bolt nut
Lockwasher
Mounting
bracket
Overhead pole-
top mounting
center insert
External
tooth
lockwasher
Figure 4. Attaching an overhead pole-top style VacuFuse II
interrupter cutout mounting to the mounting bracket.
