Charging The Spring Energy Store Manually - Siemens NXAIR Operating Instructions Manual

Open the circuit-breaker manually by using the push rod.
Fig. 87: Position indicator on the circuit-breaker, open
✓
The spring energy store for operating the circuit-breaker is discharged.

10.15 Charging the spring energy store 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 state indicator for the closing spring then
changes from DISCHARGED to CHARGED. After that, the energy required for the operating sequence
OPEN-CLOSE-OPEN is stored in the circuit-breaker.
If the auxiliary voltage is disconnected, the spring energy store for operating the circuit-breaker is no longer
charged automatically by the motor after closing the circuit-breaker. To operate the circuit-breaker in spite of
this, the spring energy store can be charged manually with a hand crank. This can be done both in test
position and in service position.
110-0134.9 / 14
(circuit-breaker 3AE5 as an example)
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 freewheel.
NOTICE
Maloperation
Racking the withdrawable circuit-breaker / circuit-breaker truck while the hand
crank is inserted in the actuating opening can damage the circuit-breaker.
Remove the hand crank from the actuating opening immediately after
manual charging of the spring energy store.
Never leave the hand crank in the actuating opening.
NXAIR / ≤ 40 kA
Operating the circuit-breaker panel
61