Siemens NXAIR M - Page 223

Panels with motor operating mechanism control
139-2021.9 / 07 NXAIR M 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
Fig. 374: Turning the racking crank
counter-clockwise
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”:
 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
from
to
Fig. 375: Turning the key clockwise
Fig. 376: Turning the key
counter-clockwise
Remove the double-bit key.
To close the actuating opening, push the operating slide down as far as it will go.