Three-phase circuit breaker and its operating mechanism with finished products of each phase

Abstract

The invention relates to a three-phase circuit breaker with phases arranged in a delta shape and an operating mechanism thereof in the field of high-voltage electrical appliances. The three-phase circuit breaker with phases arranged in a delta shape includes three phases of monopole post terminals and an installation frame for delta-shaped installation of the monopole post terminals in a way of parallel axes. The installation frame is equipped with an operating mechanism used for driving the insulating pull rods of the monopole post terminals to act. The installation frame is defined to have an up-down direction parallel to the axes of the monopole post terminals. The operating mechanism includes a driving part arranged in an up-down movement manner. A monopole post terminal driving mechanism is arranged between each phase of monopole post terminal and the driving part. The monopole post terminal driving mechanisms are of the same structure, and are arranged in a circular array aroundthe driving part. Compared with the prior art, the structure of three-phase circuit breaker is more compact, the transmission paths between the monopole post terminals and the driving part are consistent, and the monopole post terminals are stressed more uniformly.

Description

technical field [0001] The invention relates to a three-phase circuit breaker in the field of high-voltage electrical appliances with finished products of each phase arranged in a font shape and an operating mechanism for the three-phase circuit breaker used on the circuit breaker. Background technique [0002] In the medium voltage distribution network system, most of the circuit breakers are three-phase integrated circuit breakers. This type of circuit breaker is divided into two types: horizontal three-phase arrangement and longitudinal three-phase arrangement. [0003] For a three-phase horizontally arranged circuit breaker, taking VS1 as an example, the principle of its unipolar linkage mechanism is as follows: the moving end of the arc extinguishing chamber is connected to the insulating pull rod, and the overtravel spring is built into the insulating pull rod, which is invisible; the lower end of the insulating pull rod passes through the crank arm 1. The connecting ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a three-phase circuit breaker with a zigzag arrangement of finished products of each phase, so as to solve the problem that the force of each phase of the circuit breaker in the existing three-phase circuit breaker is uneven, which easily affects the work of the circuit breaker; the purpose of the present invention It is also to provide a circuit breaker operating mechanism used in the circuit breaker

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