Siemens NXAIR Operating Instructions Manual page 279

Instruction label on the door to the low-voltage compartment:
In addition to these instructions, an instruction label on the door to the low-voltage compartment informs
about proper operation of the operating lever for the busbar earthing switch.
Fig. 511: Instruction label on door to the low-voltage compartment
Preconditions
•
Busbar earthing switch in CLOSED position
•
Intended opening of the padlock released externally
•
Operating lever available
•
Electrician's ladder available as double-step ladder
•
Electromagnetic interlock (optional) deactivated
Fig. 512: Operating lever for operating the
Procedure
Ensure that the intended manual switching operation has been released externally.
Make sure according to the panel number at the panel that the release for manual
de-earthing of exactly this panel is available.
Position the electrician's ladder correctly in front of the panel.
110-0134.9 / 14
busbar earthing switch
NXAIR / ≤ 40 kA
Earthing and de-earthing the busbar system
279