Racking The Withdrawable Circuit-Breaker To Test Position Electrically - Siemens NXAIR M Operating Instructions Manual

23.10 Racking the withdrawable circuit-breaker to test position electrically

Preconditions

Withdrawable circuit-breaker in service position

Circuit-breaker in OPEN position

Remote or local control

Control door closed and padlocked

Access mode indicator for racking shows "M"
Procedure
Rack the withdrawable circuit-breaker electrically to service position either locally or from the
central control.

The withdrawable circuit-breaker has been electrically racked from service position to test
position.
139-2021.9 / 07
Panels with motor operating mechanism control
NOTICE
Maloperation
Racking the withdrawable circuit-breaker is only permissible if the circuit-breaker
is in OPEN position.
Check if the circuit-breaker is in OPEN position.
If required, switch the circuit-breaker to OPEN position before racking.
NOTICE
Maloperation
Electrically racking the withdrawable circuit-breaker is only possible when both
the high-voltage door and the control door are closed. If the control door is opened
during an electrical racking procedure, the motor stops immediately.
Do not open the control door during an electrical racking procedure.
NOTICE
Conflicting operation
Racking the circuit-breaker electrically is possible locally or from a central control.
The requirement of setting the panel to either local or remote control prevents
operating the panel locally and centrally at the same time.
Depending on the intended operating mode, set the panel to either local or
remote control (for example by switching the local-remote switch).
NXAIR M 225