Discharging The Spring Energy Store - Siemens NXAIR Operating Instructions Manual

Operating the circuit-breaker panel

10.14 Discharging the spring energy store

Preconditions
•
Withdrawable circuit-breaker / circuit-breaker truck 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.
Change of the spring state indicator during closing operation:
Charged
60
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
Discharging the spring energy store can only be done manually.
INFORMATION
Unexpected switching noise and vibration
The spring energy store is discharged abruptly. This causes a short loud noise
and low vibration.
Expect noise and low vibration from inside the circuit-breaker.
Discharged
NXAIR / ≤ 40 kA
110-0134.9 / 14