| 摘要 |
Actuator for a switch, such as a high-voltage or medium-voltage circuit breaker, comprising a freewheel coupling device (5) to allow a motor to be uncoupled when the switch contact is closed by the closing spring provided for that purpose. The device (5) comprises a helical spring (52) with contiguous coils (520) wound with contact around two cylinders one of them integral with a cogged wheel (303) in mesh with the motor and the other integral with a shaft (300) in mesh with another cogged wheel integral with the closing spring.
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