Stored-energy operating means for an electric circuit breaker

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

H - Electricity

01

H

306/328

H01H 71/10 (2006.01)

Patent

CA 1078440

ABSTRACT OF THE DISCLOSURE This operating means comprises a circuit-breaker closing spring, a rotatable spring-controller mounted for rotation between first and second dead-center positions with respect to said spring, and means for transmitting charging forces to the spring in response to rotation of the spring- controller in a forward direction from said second toward said first dead-center position. The spring acts to dis- charge and thereby further rotate said spring-controller in a forward direction when the spring-controller has been rotated in a forward direction past said first dead- center position. Discharge of the spring drives the spring-controller into said second dead-center position, following which the spring-controller oscillates about said second dead-center position to dissipate excess energy then remaining in the parts. Means is provided for closing the circuit breaker in response to said forward rotation of the spring-controller into said second dead-center position, and this means comprises: a mechanically trip-free operating mechanism coupled to the movable contact of the circuit breaker and a linkage interconnecting said spring-controller and said operating mechanism through a pin and slot coupling. The pin and slot coupling (i) transmits closing force between the spring controller and the operating mechanism during spring-discharge, (ii) allows the spring-controller to oscillate about said second dead-center position without actuating the operating mechanism, and (iii) allows the spring-controller to be moved from said second to said first dead-center position during spring-charging without act- uating said operating mechanism.

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