Breaker

Abstract

Provided is a breaker, which can match different breaking rate specifications and which is made common and standard in a spring operation mechanism thereby to reduce the number of steps of designing and manufacturing the breaker. This breaker comprises a power transmission mechanism for bringing a movable contact element (63) and a stationary contact element (62) constituting an ON / OFF contact, into and out of contact with each other, a breaking spring (26) for applying a driving force in a direction to release the movable contact element (63) from the stationary contact element (62) through the power transmission mechanism, a latch mechanism for constricting the motion of the power transmission mechanism at a position to hold the biasing state of the breaking spring (26), and a pullout operation unit for releasing the constriction of the power transmission mechanism by the latch mechanism. The pullout operation unit includes activation means and is arranged to confront a first arm of a lever thereby to turn the first arm. The lever includes a second lever arranged to have its leading end retained by the latch mechanism, and is turned to release the constriction of the power transmission mechanism by the latch mechanism. Moreover, the length size from the turning center of the first arm of the lever to the operation axis of the activation means, and the gap between the first arm of the lever and the activation means are different according to the breaking rate specifications.

Description

technical field [0001] The present invention relates to a circuit breaker using a spring operating mechanism, and to a circuit breaker suitable for use as a high-voltage power gas circuit breaker in a substation, a distribution station, and the like. Background technique [0002] In a gas circuit breaker for electric power installed in a substation or a distribution station, a spring operation using a spring is used as the driving force for opening and closing the opening and closing contacts such as the movable and fixed contacts forming the circuit breaker. device. For example, Japanese Patent Laid-Open Publication No. 2001-283691 (Document 1) is a circuit breaker using such a spring operator. In this publication, a spring-operated operator is disclosed, which adopts a cam or a joystick installed on a rotating shaft, a circuit breaker that releases the energy storage state according to an operation command, and a connection spring to realize the opening and closing contac...

AI Technical Summary

Problems solved by technology

[0008] That is to say, in the technology of the spring operator used in the existing circuit breaker, since the generalization or standardization of the components in the spring operator is not considered at all, the driving operation of the opening and closing contacts forming the circuit breaker can meet the requirements of different circuit breakers. Cycle number (breaking speed) requirements, therefore, there is a problem of complex design and manufacture of circuit breakers

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