Description
2.2 Circuit breakers and non-automatic circuit breakers
3WA Air Circuit Breakers
38 Equipment Manual, 05/2021, 92310000002-03
2.2.4 Operation
2.2.4.1 Charging the stored-energy spring
To be able to close the circuit breaker, the stored-energy spring must be charged.
Manually charging the stored-energy spring
Stored-energy spring is charged
1. Fully grasp the charging handle.
2. Execute nine strokes evenly and completely to the stop.
Execute the ninth stroke just as far and evenly as the first eight strokes, although the
actuating force will increase (see graphic above).
Once the stored-energy spring has been fully charged, the charging handle can be moved
without resistance.
Automatically charging the stored-energy spring
As an option, the stored-energy spring can also be charged automatically with the spring
charging motor. For more information, see Chapter Spring charging motor (Page 180).
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