Siemens NXAIR M Operating Instructions Manual page 137

Earthing and de-earthing the busbar system
After turning the operating lever to the end position, the position indicator of the busbar
earthing switch changes from the intermediate position to the CLOSED position.
Fig. 233: Operating lever in end position
Remove the operating lever.
To close the actuating opening, push the operating slide down as far as it will go.
Fit a padlock to the operating slide and close it.
The busbar earthing switch has been switched from the OPEN position to the CLOSED
position, thus earthing the busbar. The position indicator of the busbar earthing switch
changes from the OPEN position via the intermediate position to the CLOSED position.
Fig. 234: Operating slide on busbar earthing switch padlocked
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The busbar system is earthed.
139-2021.9 / 07 NXAIR M 137