Opening The Circuit-Breaker Manually - Siemens NXAIR M Operating Instructions Manual

10.12 Opening the circuit-breaker manually

Preconditions

Withdrawable circuit-breaker in service position or in test position

Circuit-breaker in CLOSED position

High-voltage door closed

Panel set to local control

Padlock (optional) removed from actuating opening

Push rod available
139-2021.9 / 07
NOTICE
Conflicting operation
The requirement of setting the panel to either local or remote control prevents
operating the panel locally and centrally at the same time.
For operating the circuit-breaker manually, set the panel to local control,
for example by switching the local-remote switch to LOCAL position.
HINT
Unexpected motor noise and vibration
Operating the circuit-breaker discharges and/or charges the spring energy store
abruptly. This causes a short loud noise and low vibration.
Expect switching noise and low vibration from inside the circuit-breaker.
HINT
The opening spring is charged during the closing operation.
Fig. 62: High-voltage door with actuating opening
Operating the circuit-breaker panel
NXAIR M 45