Siemens NXAIR M Operating Instructions Manual page 36

Operating the circuit-breaker panel
Procedure
Lift the operating slide and hold it.
To release access to the withdrawable circuit-breaker, insert the double-bit key and turn
clockwise as far as it will go (that is 90°).
Fig. 42: Releasing access to the withdrawable part
Push the racking crank for moving the withdrawable circuit-breaker onto the operating shaft,
and turn clockwise as far as it will go.
Remove the racking crank for moving the withdrawable circuit-breaker.
Turn the double-bit key clockwise as far as it will go (that is 90°) to interlock the withdrawable
circuit-breaker.
Fig. 43: Turning the racking crank
36
NOTICE
Maloperation
All interlocks are only released when the withdrawable part is in a stable end
position.
Rack the withdrawable circuit-breaker absolutely until end position.
clockwise
Fig. 44: Turning the double-bit key
clockwise
NXAIR M 139-2021.9 / 07