16 S&C Instruction Sheet 465-500
Operation
To Close:
Pull the pull-ring of the yellow OPEN/CLOSE
lever down firmly using the straight prong of the Talon
tool or a distribution prong. The vacuum interrupter inside
the VacuFuse interrupter will close, and the POSITION
indicator will show the red target. See Figure 16. If the
VacuFuse interrupter is inadvertently closed into a fault,
the vacuum interrupter will trip open independently of any
force still applied to OPEN/CLOSE lever.
To Reset the OPEN/CLOSE Lever After Manually
Closing into Fault Current:
If the transformer is manu-
ally closed into fault current, the VacuFuse interrupter
will trip open in response, leaving the lever in the
Closed
position when the vacuum interrupter is in the
Open
position. The lever can be “reset” by operating it into the
Open
position while the vacuum interrupter is in the
Open
position.
Setting the MODE SELECTOR Lever
Before leaving the VacuFuse Self-Resetting Interrupter,
verify the MODE SELECTOR lever is in the desired
position. The MODE SELECTOR lever has two positions.
Figure 17 shows the MODE SELECTOR lever up in the
Auto
mode position. Figure 18 on page 17 shows the
MODE SELECTOR lever down in the
NR
(non-reclose)
mode position.
Auto Mode
—In the
Auto
mode, the VacuFuse inter-
rupter will respond to fault current according to its preset
TCC curve. The VacuFuse interrupter will perform one
reclosing operation (two trip operations total) to lockout.
The open interval between trip operations is user-specified
and factory set between 0.5 and 5 seconds.
The protection sequence reset time is a user-specified and
factory-set interval between 30 seconds and 15 minutes. If a
fault persists to the end of the protection sequence, the vac-
uum interrupter inside the VacuFuse interrupter will remain
in the
Open/Lockout
state until manually closed. The
VacuFuse Self-Resetting Interrupter will NOT drop out
of the mounting and will remain upright in the cutout
mounting.
The VacuFuse Self-Resetting Interrupter is in the
Auto
mode when the curved label on the side of the VacuFuse
interrupter’s housing is fully covered and the label on the
bottom of the lever aligns with the label on the bottom
of the VacuFuse interrupter’s housing. See Figure 17 and
Figure 11 on page 14.
Figure 16. Closing the VacuFuse interrupter by pulling down on
the OPEN/CLOSE lever.
Figure 17. The MODE SELECTOR lever in the Auto mode
position.
MODE
SELECTOR
lever
