GE Industrial Solutions Entellisys Low Voltage Switchgear - Manuel (Page 44)

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The typical interlock system is designed so that the key
may be removed from the lock only when the breaker is
tripped. The key actuates a cam that elevates the trip
bar on the cassette and the breaker is rendered trip free.
Key Interlock Operation Check
The operation of the key interlock should be checked as
follows:
1. With the breaker in the CONNECTED position,
manually trip the breaker. This then allows the key
interlock to elevate the trip bar. When the trip bar
is elevated, the breaker cannot be closed but the
key can be removed. The breaker will remain trip
free until the key is returned and the trip bar is
lowered.
Fig. 7-5. View showing circuit breaker key interlock to
provide protection against unauthorized operation
2. If desired, the breaker may be moved to either the
TEST or DISCONNECT position while the key is
removed from the lock. In these positions, the
breaker cannot be operated for checking or
maintenance. The Kirklock also locks the racking
access door if the key is not inserted in the lock.
Padlocking the Cassette Racking Door (See Fig. 7-6)
The cassette racking door can be padlocked to prevent
access to the racking door. The cassette can be
padlocked with the breaker in any position or without
the breaker installed. Up to three padlocks can be placed
on a cassette. A padlock with a hasp thickness of at least
0.120” should be used to padlock the racking shaft door.
To padlock cassette racking door, pull out the racking
door locking tab and insert padlock, see Fig 7-6.
Fig. 7-6. Cassette Racking door padlock device
Fig. 7-7. Compartment padlock device
Padlocking the EntelliGuard E Cassette (See Fig. 7-7.)
1. The circuit breaker compartment door must be
opened to put the padlock on; however, there is no
interference with the door after the padlock has
been placed in position.
2. Padlocks will prevent the acceptance of breakers
in the cassette.
3. The padlock device on the cassette will accept up
to three padlocks on both the left and right sides
of the cassette.
Padlocking the Shutter (See Fig. 7-8)
1. Shutter locking rod
2. Shutter padlock tab
Fig. 7-8. Shutter padlocking
The shutter on each cubicle can be padlocked to prevent
access to the live primary conductors. The shutter can
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