12 S&C Instruction Sheet 466-500
Installation
Understanding the Closing Sequence
Note:
The VacuFuse II Self-Resetting Interrupter is
shipped from the factory with the vacuum interrupter in
the
Open
position.
When closing the VacuFuse II Self-Resetting Interrupter
into the cutout mounting, the CHARGING LED will blink
at a 1-second interval as long as there is voltage available
at the cutout and the vacuum interrupter is OPEN.
The READY TO CLOSE LED will steadily illuminate
when the VacuFuse II Self-Resetting Interrupter has har-
vested enough energy to close the vacuum interrupter.
The VacuFuse II Self-Resetting Interrupter requires
45 ± 10 seconds to harvest enough energy to close the
vacuum interrupter.
There are two ways to close the vacuum interrupter:
Option 1 – Automatic Delay Close
Place the OPEN/CLOSE lever into the
Closed
(up) position
at any time (before or after mounting the unit into the
cutout mounting). When closed into the cutout mounting,
the CHARGING LED will blink at a 1-second interval as
long as there is voltage available at the cutout and the
vacuum interrupter is open. The unit will automatically
close the vacuum interrupter after 45 ± 10 seconds.
Option 2 – Manual Close
Place the OPEN/CLOSE lever into the
Open
(down) position
before mounting the unit into the cutout mounting or at
any time before the READY TO CLOSE LED illuminates.
For an intentional close on a precise timing, wait until
the READY TO CLOSE LED is solidly lit. At that time, the
unit is ready to be closed manually by moving the OPEN/
CLOSE lever to the
Closed
position. Three seconds after
the lever is moved to the
Closed
position, the vacuum
interrupter will close.