Inspection and maintenance
5.5 Preparing for maintenance work
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
401
2. Open the circuit breaker and discharge the stored-energy spring.
– Press O / OPEN.
– Isolate the auxiliary circuits by unplugging the manual connectors.
– Press I / CLOSE.
A charged stored-energy spring is discharged.
– Press O / OPEN.
– Ensure that the switch position indicator shows OPEN.
The circuit breaker is open.
– Ensure that the switch position indicator shows DISCHARGED.
The stored-energy spring is discharged.
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