S&C Instruction Sheet 466-500 21
Operation
Figure 18� An incorrect approach�
Figure 17� An incorrect approach�
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 hesi-
tation. The resetting latch will keep it open.
Generally, there is no indication of circuit inter-
ruption; 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 .
