ABB Uniswitch - Door Interlocking

ABB 20
Uniswitch Operation and
Maintenance Manual
UNIS14GB 05-02
3.5.3.2 Door interlocking
Figure 3.11
Withdrawable type switchgear: Circuit-breaker compartment door locking
device.
Door interlocks The cubicles are equipped with the following door interlocks:
• The apparatus compartment door cannot be opened if the circuit-
breaker is in service or in an undefined position.
• The circuit-breaker & cable compartment door cannot be opened if
the earthing switch is open.