S&C VacuFuse II Installation And Operation Manual page 17

The VacuFuse II Self-Resetting Interrupter will "drop
out" of the cutout mounting after one minute when the
vacuum interrupter is in the Open position and the READY
TO CLOSE LED is lit.
To Open: Pull the yellow manual operating lever down
firmly using the straight prong of the Talon tool or a dis-
tribution prong. Remove the tool right away. The vacuum
interrupter inside the VacuFuse II interrupter will open,
and the POSITION indicator will show the green target.
After one minute and 45 seconds of the vacuum interrupter
in the Open position, the unit will drop out. See Figure 12.
To Close: Push the pull-ring of the yellow manual oper-
ating lever up firmly using the straight prong of the Talon
tool or a distribution prong. The vacuum interrupter inside
the VacuFuse II interrupter will close after 45 seconds of
sufficient voltage being present at the cutout mounting,
and the POSITION indicator will show the red target. See
Figure 13. If the VacuFuse II interrupter is inadvertently
closed into a fault, the vacuum interrupter will trip open
independently of any force still applied to the manual
operating lever.
To Reset the Manual Operating Lever After
Manually Closing into Fault Current: When the
VacuFuse II interrupter trips in response to a fault,
the lever does not move, leav ing the lever in the
Up position when the vacuum interrupter is open. The lever
can be "reset" by operating it to the Down position while
the vacuum interrupter is open. When the lever is in the
Up position, the interrupter will automatically close the
next time it is pushed into the cutout mounting.
Note: After the interrupter drops open (either because
of a permanent fault or moving the manual operating lever
to the Down position and waiting for the unit to drop open),
it is necessary to wait at least 20 seconds before closing
the interrupter into the cutout mounting again. If the inter-
rupter is closed into the cutout mounting immediately
after a permanent fault, it will drop-out without closing.
This happens because of the interrupter interpreting that
it never dropped-out from the cutout mounting.
Manual operating
lever
Figure 12� Operating the manual operating lever into the
Down position�
Manual operating
lever
Figure 13� Operating the manual operating lever into the
Closed position�
S&C Instruction Sheet 466-500
Operation
17