Siemens NXAIR Operating Instructions Manual page 256

Operating the removable voltage transformers
Moving the removable voltage transformers into the panel
To undo the interlocking between the removable voltage transformers and the service truck,
push the lever to the left and hold it.
Fig. 461: Pulling the lever to unlock
Lift the handle of the removable voltage transformers. Keep it lifted and push the removable
voltage transformers into the panel as far as it will go.
Fig. 462: Pushing the removable voltage transformers into the panel
Push the handle down to interlock the removable voltage transformers with the panel.
Fig. 463: Pushing the handle down
✓
The removable voltage transformers are inserted in the panel.
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