Conducting loop structure of low-voltage circuit breaker

Abstract

The invention discloses a conducting loop structure of a low-voltage circuit breaker. A static contact is connected with a static contact clamping device which comprises three connecting parts: the left part is of a square structure which has a hole and is connected with a busbar; the right part is of a dual-plate clamping structure which is supported to the middle part, and the static contact is arranged between the dual-plate clamping structure in a revolving mode; the middle part of the static contact clamping device is lower than the left part and the right part; a dynamic contact is connected with a dynamic contact clamping device which comprises a left part and a right part, wherein the left part is of a round head dual-plate clamping structure, and the dynamic contact is arranged between the round head dual-plate clamping structure in a revolving mode; and a square structure of the right part is connected with a heating element which forms an integral structure with an outlet terminal of a tripping system. The whole conducting loop does not have soft connection and welding spots, the cost for switching on or off is lowered effectively, the temperature rise is lowered, the dynamic and thermal stability is enhanced, and the electric life and the mechanical life are prolonged.

Description

technical field [0001] The invention relates to a conductive loop structure, which belongs to the conductive part of a molded case low-voltage circuit breaker. Background technique [0002] At present, the conductive part of the molded case low-voltage circuit breaker consists of a contact system and a tripping system. Among them, the contact system includes a static contact and a moving contact. The static contact and the incoming line end are connected by soft connection welding, and the moving contact is welded with a soft connection and a transfer bar. Connection; thermal element and outlet bar of tripping system welded. The conductive part of a molded case low-voltage circuit breaker has multiple welds, and welding has become a key process for the manufacture of the conductive part. Its defects are: the quality of welding affects the temperature rise and performance of the product, and multiple welds reduce production efficiency, resulting in product The quality is no...

AI Technical Summary

Problems solved by technology

The conductive part of a molded case low-voltage circuit breaker has multiple welds, and welding has become a key process for the manufacture of the conductive part. Its defects are: the quality of welding affects the temperature rise and performance of the product, and multiple welds reduce production efficiency, resulting in product Unstable quality

In order to avoid the use of soft connections, clamping parts are generally used, and the clamping parts are generally used in the part connected with the release after the moving contact. Since the static contact support parts are all ferromagnetic materials, it cannot be used in the static contact part. Clamps with conductors

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