Siemens NXAIR Operating Instructions Manual page 97

Operating the circuit-breaker panel
Close the high-voltage door.
Switch the auxiliary voltage on.
The motor in the circuit-breaker starts up and charges the spring energy store. The spring
state indicator for the closing spring changes to CHARGED.
✓
The circuit-breaker truck is inserted in the panel and the high-voltage door is closed.
NXAIR / ≤ 40 kA
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