KRB-5404
102
8.DOOR INTERLOCK
Function of the Door Interlock
General:
The door interlock prevents the switchboard panel from being opened when the ACB is closed, or in the CONNECT or
TEST POSITION. The panel door is only operable when the ACB is OPEN and ISOLATED, thus preventing remote
operation of the ACB.
Normal Function:
When the ACB is CLOSED and in the connected position the draw-out handle cannot be inserted.
When the ACB is OPEN it can be drawn-out to the test or isolated position. This is indicated on the ACB’s position
indicator.
To open the panel door the ACB is required to be OPEN and in the isolated position.
Areas of Caution:
Ensure the panel door is fully closed and locked before attempting to draw-out or rack in the ACB, from any of thee three
positions (CONNECTED, TEST & ISOLATED) to another.
When moving the ACB body, care should be taken not to damage the door interlock pin, situated at the bottom left and
protruding from the ACB.
Interlock Release:
The door interlock can be defeated by releasing the spring-actuated catch on the interlock panel unit. This is
accessible
through a hole located between the interlock panel unit fasteners.
Door Interlock Adjustment
How to adjust the panel unit:
Once the ACB is installed into the switchboard and the panel door unit is fitted, check the position of the handle shutter
when the door is closed and the ACB is in the isolated position.
Draw-out handle shutter
The handle shutter
is a good position at the
centre of the hole and no
adjustment is required
Adjustment plate
