Operating the circuit-breaker panel
48
NXAIR M
139-2021.9 / 07
Fig. 66: Position indicator on the circuit-breaker, OPEN
The spring energy store for the closing spring in the circuit-breaker is discharged.
10.14 Charging the spring manually
In order to operate the circuit-breaker, it is necessary that the spring energy store in the circuit-breaker is
charged. If auxiliary voltage is connected, the spring energy store is recharged via a motor inside the circuit-
breaker immediately after closing the circuit-breaker. The spring energy store indicator at the circuit-breaker
changes from NOT CHARGED to CHARGED. After that, the energy required for the operating sequence
OPEN-CLOSE-OPEN is stored in the circuit-breaker.
If the control voltage fails, the spring energy store for operating the circuit-breaker is no longer charged
automatically by the motor after the circuit-breaker has been closed. To operate the circuit-breaker in spite of
this, the spring energy store must be charged manually with a hand crank. The spring energy store in the
circuit-breaker can be charged manually both in test position and in service position.
Fig. 67: Hand crank for manual charging of the spring energy store
in the circuit-breaker
WARNING
Injury when using inappropriate tool
When the auxiliary voltage is connected, the motor immediately recharges the
spring energy store after the closing operation. If the hand crank does not have a
freewheel, the hand crank will rotate.
Use only the original hand crank with slip coupling.
Change of the spring state indicator
during the switching operation:
CHARGED
DISCHARGED
