S&C Instruction Sheet 466-500 23
Troubleshooting
Figure 18. The Loadbuster tool attached to a VacuFuse II
Self-Resetting Interrupter.
STEP 5.
To detach the Loadbuster tool after circuit
interruption, first raise it slightly and disengage
the anchor from the attachment hook.
STEP 6.
Bring the VacuFuse II Self-Resetting Interrupter
toward the
Drop Out
position. Then, remove
the Loadbuster tool from the pull-ring by
rotating the pole. This will deflect the pull-ring
latch to release the pull-ring. Because the
VacuFuse II Self-Resetting Interrupter will
drop fully open from gravity, it may be preferable
to remove the Loadbuster tool by “rolling” it off
both the attachment hook and pull-ring at the
same time by twisting the pole after the
Loadbuster tool has been tripped and fully
extended. To perform this operation smoothly,
always roll the Loadbuster tool so that it rotates
in an upward direction.
STEP 7.
To reset the Loadbuster tool for the next
operation, hold it as shown in Figure 19. Extend
the tool slightly and lift the resetting latch with
your thumb. With the latch up, telescope the tool
completely so the trigger can reset itself.
Depress the telescoping tube until the orange
paint on the inner tube assembly is no longer
visible. Check for proper resetting by extending
the tool about 3 inches (76 mm). Throughout
this travel, an increasing spring resistance
should be felt.
Note:
When the VacuFuse II Self-Resetting Interrupter is
opened with a Loadbuster tool, the vacuum interrupter
inside the VacuFuse II interrupter will not be triggered
open and will remain closed.
Figure 19. Resetting the Loadbuster tool.