Siemens NXAIR M - Preparations Before Accessing the Connection Compartment; Accessing the Connection Compartment through the Switching-Device Compartment

Operating the circuit-breaker panel
139-2021.9 / 07 NXAIR M 47
10.13 Discharging the spring energy store
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
Discharging the closing spring can only be done manually.
HINT
Unexpected motor noise and vibration
The spring energy store is discharged abruptly. This causes a short loud noise
and low vibration.
Expect switching noise and low vibration from inside the circuit-breaker.
Preconditions
 Withdrawable circuit-breaker in test position
 Circuit-breaker in CLOSED position
 Spring state indicator for the closing spring shows CHARGED
 High-voltage door closed
 Panel set to local control
 Auxiliary voltage for the panel disconnected
 Push rod available
Procedure
The operating sequence is OPEN-CLOSE-OPEN manually.
Open the circuit-breaker manually by using the push rod.
Close the circuit-breaker manually by using the push rod.
Open the circuit-breaker manually by using the push rod.