Siemens SINOVA - Circuit Breaker Description; Closing, Opening, Commissioning, and Connections

Description
2.1 Mechanical components
3WJ Air Circuit breakers
24 Operating Instructions, 12/2022, L1V30828903001-01
Manually charging the stored-energy spring
F
Actuating force
n
Number of strokes
(1)
Stored-energy spring is charged
1. Fully grasp the charging handle.
2. Execute five strokes evenly and completely to the stop.
Execute the fifth stroke just as far and evenly as the first four 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.
2.1.4.6 Closing and opening
Note
The minimum time difference between ON and OFF command should be at least 100 ms.
Conditions for ready-to-close status
The conditions for the breaker's ready-to-close status can be found in Chapter Commissioning
checklist (Page 28).
The circuit breaker is ready for closing when the READY window displays OK.
Automatically charging the stored-energy spring
If a spring charging motor is integrated, immediately after switching on, the stored-energy
spring is charged again by the spring charging motor.