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

1976-07-02

1978-08-29

Tudor, Harold J.

Electricity: circuit makers and breakers

Liquid contact

Time delay

74 2, 185 37, 192 33R, H01H 300

Patent

active

041105826

ABSTRACT:
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 abutment 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 oscillations 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.degree. of reverse travel from its second dead-center position.

REFERENCES:
patent: 2909628 (1956-10-01), McCloud
patent: 3410381 (1968-11-01), Henshaw et al.
patent: 3689721 (1972-09-01), McGuffie
patent: 3876847 (1975-04-01), Dykes
patent: 3905247 (1975-09-01), Cook

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