Siemens NXAIR Operating Instructions Manual page 59

Procedure
Turn cover of actuating opening aside using the rotary button located over it.
Insert the push rod through the actuating opening in the high-voltage door and operate the
OFF pushbutton until the switching noise of the circuit-breaker can be heard.
Fig. 84: Rotary button
The spring state indicator for the closing spring does not change.
Fig. 86: Position indicator on the circuit-breaker, open
(circuit-breaker 3AE5 as an example)
Take the push rod out of the actuating opening.
Fit a padlock (optional) to the actuating opening and close it.
✓
The position indicator on the circuit-breaker changes from I position to 0 position.
The circuit-breaker is open.
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Operating the circuit-breaker panel
Fig. 85: Push rod inserted
NXAIR / ≤ 40 kA
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