22 S&C Instruction Sheet 466-500
Troubleshooting
Figure 17. An incorrect approach.
STEP 3.
Swing the Loadbuster tool toward the
VacuFuse II Self-Resetting Interrupter and pass
the Loadbuster pull-ring hook through the pull-
ring on the VacuFuse II Self-Resetting
Interrupter. The pull-ring latch will deflect and,
upon complete entry of the pull-ring, will spring
back, locking the Loadbuster tool to the pull-
ring. The Loadbuster tool is now connected
across the upper contacts of the VacuFuse II
Self-Resetting Interrupter, as shown in
Figure 18 on page 23.
STEP 4.
To open the circuit, operate the Loadbuster tool
with a firm, steady pull until it is extended to its
maximum length. A downward pull to open the
VacuFuse II Self-Resetting Interrupter extends
the Loadbuster tool and charges the tool’s
internal spring. At a predetermined point in the
opening stroke, a trigger inside the tool will trip,
releasing the charged spring, separating the
internal contacts and interrupting the circuit.
Successful operation is independent of the speed
with which the VacuFuse II Self-Resetting
Interrupter is opened. Avoid jerking and
hesitation. The resetting latch will keep it open.
Generally, there is no indication of circuit
interruption; the only sound is that of the
Loadbuster tool tripping.
WARNING
Careless manipulation of the Loadbuster
tool can decrease the open gap to the point
where a flashover could occur . This can
result in arcing, electrical shock, serious
injury, or death .
Figure 16. An incorrect approach.
