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Interlocks
7.4
Additional padlock interlock (optional)
Action
Racking the withdrawable part
Operating the feeder earthing switch
Operating the busbar earthing switch
Opening the high-voltage door
7.5
Additional key-operated interlock (optional)
Action
Racking the withdrawable part to service position
Switching the feeder earthing switch to
CLOSED position
Switching the feeder earthing switch to
OPEN position
Switching the busbar earthing switch to
CLOSED position
Switching the busbar earthing switch to
OPEN position
22
HINT
Panel versions with electromagnetic interlock are identified on the high-voltage
door with labels for interlocking the disconnecting and/or the earthing function:
HINT
The busbar earthing switch is secured against unintentional operation by means of
a padlock or an electromagnetic interlock.
Panel version with electromagnetic interlock is identified on the door to the low-
voltage compartment with a label:
NXAIR M
Additional preconditions
Access to actuating openings only after
removing the padlock
Access to actuating openings only after
removing the padlock
Access to actuating openings only after
removing the padlock
Access to actuating openings only after
removing the padlock
Additional preconditions
Access to actuating openings only after
opening the lock
Access to actuating openings only after
opening the lock
Access to actuating openings only after
opening the lock
Access to actuating openings only after
opening the lock
Access to actuating openings only after
opening the lock
139-2021.9 / 07
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