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

Operating the circuit-breaker panel

10.13 Opening the circuit-breaker manually

Preconditions
•
Withdrawable circuit-breaker / circuit-breaker truck 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
Fig. 82: High-voltage door with
actuating opening
58
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.
INFORMATION
Unexpected switching 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.
INFORMATION
The opening spring is charged during the closing operation.
NXAIR / ≤ 40 kA
Fig. 83: Push rod
110-0134.9 / 14