An n-pole static contact and its circuit breaker with n-pole

Abstract

The invention discloses an N-pole static contact and a circuit breaker with an N-pole. The N-pole static contact includes a long sheet type and has a bent body. One end of the body is set as a static contact connection part, and the static The contact connection part is extended with an arc guide part, and the other end of the body is set as a terminal connection part; the body is provided with two bending parts twisted in the width direction, so that the body surface of the middle part of the body is relatively The body surface is twisted approximately 90 degrees in the width direction. This structure of the present invention, on the one hand, can more accurately control the size of the N pole static contact, to reduce the difficulty of mold processing, and can conveniently extend the welding tool to the back of the static contact welding part, so that the static contact The welding becomes much easier; on the other hand, when the N-pole static contact is installed in the outer shell of the circuit breaker, the large surface is used as the positioning surface, which improves the accuracy of positioning, and can also remove the N-pole static contact and the yoke The plastic interlayer between them and expand the space of the arc extinguishing chamber to improve the arc extinguishing effect.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to an N pole static contact and a circuit breaker with N poles thereof. Background technique [0002] A circuit breaker refers to a switching device that can close, carry and break current under normal circuit conditions and can close, carry and break current under abnormal circuit conditions within a specified time. Circuit breakers usually include contact system, arc extinguishing system, operating mechanism, release, housing and other components. In the contact system, it usually includes moving contacts and static contacts. Circuit breakers usually include single-phase single-wire, single-phase two-wire, three-phase three-wire, three-phase four-wire, etc., among which single-phase two-wire, three-phase four-wire, etc. are circuit breakers with N poles. The N-pole static contact of a circuit breaker with N-pole in the prior art is as follows: figure 1 , figure 2 as ...

AI Technical Summary

Problems solved by technology

On the other hand, when this N pole static contact is applied to a circuit breaker, such as image 3 as shown, image 3 It is a schematic diagram of some components of a circuit breaker with N poles in the prior art. Since the N pole static contact 100 is installed in the housing 106 of the circuit breaker with the thickness surface of the middle part 104 as the positioning surface, it is easy to cause inaccurate positioning. Disadvantages, moreover, the N-pole static contact 100 and the magnetic yoke are installed in the circuit breaker housing 106 in a vertical distribution manner. On the one hand, a plastic interlayer needs to be added between the magnetic yoke and the N-pole static contact to prevent electrical breakdown , on the other hand, the space of the arc extinguishing chamber below is greatly reduced

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