Siemens NXAIR M Operating Instructions Manual page 223

Procedure
To open the actuating opening for racking, lift the operating slide as far as it will go and hold
it.
Push the racking crank for moving the withdrawable circuit-breaker onto the operating shaft,
and turn counter-clockwise as far as it will go.
Fig. 373: Lifting the operating slide
Remove the racking crank for moving the withdrawable circuit-breaker.
Depending on the access mode intended, turn the double-bit key until the operating mode
indicator changes to "M" or to "T":


Fig. 375: Turning the key clockwise
Remove the double-bit key.
To close the actuating opening, push the operating slide down as far as it will go.
139-2021.9 / 07
Panels with motor operating mechanism control
To release electrical access to the withdrawable circuit-breaker, change from "H" to
"M" by turning 90° clockwise.
To block any access to the withdrawable circuit-breaker, change from "H" to "T" by
turning 90° counter-clockwise.
from
to
Fig. 374: Turning the racking crank
counter-clockwise
Fig. 376: Turning the key
NXAIR M
from
to
counter-clockwise
223