Circuit device and withdrawable circuit breaker

Abstract

The invention provides a circuit device used for a withdrawable circuit breaker. The circuit device comprises an incoming end client terminal, an incoming end connecting piece, an incoming end contact gasket, a circuit module arranged in a circuit breaker body, an outgoing end contact gasket, an outgoing end connecting piece and an outgoing end client terminal, wherein the incoming end client terminal, the incoming end connecting piece, the outgoing end connecting piece and the outgoing end client terminal are arranged on a drawing frame, the incoming end contact gasket and the outgoing end contact gasket are arranged on the circuit breaker body, when the circuit breaker body is pushed into the drawing frame, the incoming end connecting piece is connected between the incoming end client terminal and the incoming end contact gasket, the outgoing end connecting piece is connected between the outgoing end client terminal and the outgoing end contact gasket, and when the circuit breaker body is drawn out from the drawing frame, the incoming end connecting piece and the outgoing end connecting piece are respectively separated from the incoming end contact gasket and the outgoing end contact gasket. According to the circuit device for the withdrawable circuit breaker, the structure is simplified, contacts are reduced, the contact resistance is reduced, and the size is reduced.

Description

technical field [0001] The present invention relates to a circuit device and a circuit breaker including the circuit device, in particular to a circuit device in a drawer type circuit breaker and a drawer type circuit breaker including the circuit device. Background technique [0002] The drawer type circuit breaker is a circuit breaker commonly used in low-voltage power distribution equipment at present. The schematic diagram of the drawer type circuit breaker is as follows: figure 1 shown. exist figure 1 Among them, 1 represents the whole circuit breaker, and the circuit breaker is composed of a chassis 10 and a circuit breaker body 20 . Wherein, the circuit breaker body 20 is pulled out or pushed from the cradle 10 through the guide rails installed on the cradle, so as to realize disconnection and communication between the circuit breaker and the busbars at the incoming and outgoing terminals. figure 1 A state in which the circuit breaker body 20 is pulled out from the...

AI Technical Summary

Problems solved by technology

[0005] Such a structure has a long current path and many contact points, which has the disadvantages of large contact resistance, high power consumption, complex structure, and large product size.

In addition, since the material of all conductive parts in the circuit device is pure copper, the plating layer is silver plating layer, and the structure of the circuit breaker is all 3 poles or 4 poles, so it takes a lot of copper and silver materials, and the price of metal materials is also high. It is rising day by day, so the product of this structure also has the disadvantage of high cost

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