Siemens NXAIR Operating Instructions Manual page 401

Close the control door.
Fit a padlock to the control door and close it.
✓
The withdrawable circuit-breaker / circuit-breaker truck has been manually racked from
service position to test position.
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Panels with motor operating mechanism control
INFORMATION
Final procedure steps
If "T" is selected, you may now open the high-voltage door and take the
withdrawable circuit-breaker / circuit-breaker truck out of the panel.
Otherwise, you may now go on to close the circuit-breaker electrically for
testing purpose.
NXAIR / ≤ 40 kA
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