Siemens NXAIR M Operating Instructions Manual page 184

Accessing the connection compartment through the rear
Preconditions

Withdrawable part inserted in the switching-device compartment:

High-voltage door closed

Withdrawable part in test position

Feeder earthing switch in CLOSED position
Procedure
Check if the position indicator of the feeder earthing switch on the high-voltage door is in
vertical I position.
Fig. 315: Position indicator on high-voltage door
Remove the connecting elements from the horizontal ledge (3):

12 / 14 bolts M8x20 with contact washers
Remove the horizontal ledge, and store it together with the associated connecting
elements.
184
CAUTION
High weight
Die upper rear wall is heavy.
Remove the upper rear wall absolutely with 2 persons.
HINT
Hereafter, the disassembly of those parts is described, which are later
assembled again at the same place.
Store disassembled parts and bolting material carefully, and keep them
available for later reuse.
NXAIR M 139-2021.9 / 07