Siemens NXAIR M - Control Elements at the Front Side of the Panel

Interlocks
22 NXAIR M 139-2021.9 / 07
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:
7.4 Additional padlock interlock (optional)
Action
Additional preconditions
Racking the withdrawable part
Access to actuating openings only after
removing the padlock
Operating the feeder earthing switch
Access to actuating openings only after
removing the padlock
Operating the busbar earthing switch
Access to actuating openings only after
removing the padlock
Opening the high-voltage door
Access to actuating openings only after
removing the padlock
7.5 Additional key-operated interlock (optional)
Action
Additional preconditions
Racking the withdrawable part to service position
Access to actuating openings only after
opening the lock
Switching the feeder earthing switch to
CLOSED position
Access to actuating openings only after
opening the lock
Switching the feeder earthing switch to
OPEN position
Access to actuating openings only after
opening the lock
Switching the busbar earthing switch to
CLOSED position
Access to actuating openings only after
opening the lock
Switching the busbar earthing switch to
OPEN position
Access to actuating openings only after
opening the lock