Siemens NXAIR M Operating Instructions Manual page 108

Operating the removable voltage transformers
Remove the racking tool.
Fig. 172: Removing the racking tool
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.
Fig. 173: Fitting a padlock

The removable voltage transformers are in service position.
108 NXAIR M 139-2021.9 / 07