Stored-energy operating device for an electric circuit breaker

Details Stored-energy operating device for an electric circuit breaker Stored-energy operating device for an electric circuit breaker

H - Electricity

01

H

306/328

H01H 71/10 (2006.01)

Patent

CA 1078441

ABSTRACT OF THE DISCLOSURE An operating device for an electric circuit breaker comprises a closing spring and a rotatable spring-controller mounted for rotation between first and second dead-center positions with respect to the spring. The spring is charged by transmitting rotational forces to the spring-controller through a pawl mounted on the spring controller and an abutment on a rotatable driving member. Cam means is provided for releasing the pawl from driven engagement with the abut- ment at the end of a spring-charging operation. Circuit- breaker closing is effected by allowing the spring quickly to discharge after a charging operation. Discharge of the spring carries the spring-controller into said second dead-center position and produces oscilla- tions of the spring-controller immediately following such discharge. The cam means holds the pawl out of a collision path with respect to said abutment during such oscillations, even if such oscillations should carry the spring-controller through as much as 90° of reverse travel from its second dead-center position.

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