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Circuit breaker

A circuit breaker and moving contact technology, which is applied to circuit breaker components, circuit breaker contacts, etc., can solve problems such as arc reignition, achieve the effects of preventing arc reignition, eliminating damage, and ensuring reliable operation

Active Publication Date: 2017-08-18
ZHEJIANG PEOPLE ELE APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that after the moving contact and the static contact are separated, the moving contact rebounds and moves to the arc due to the collision and contact between the moving contact and the arc strike plate. The distance that can be broken down causes the defect of arc re-ignition, thus providing a method that can effectively prevent the moving contact and the static contact from colliding with the arc plate, causing the moving contact to rebound or even move to the point where the arc can be broken down The distance, so that the miniaturized circuit breaker of the arc restrike

Method used

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Embodiment Construction

[0040] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041]In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

[0042] Such as Figure 1~4 A specific embodiment of the shown circuit breaker includes a housing 1 inside which a contact assembly, a driving mechanism 2 and an arc extinguishing device 3 are arranged. The contact assembly includes a moving contact 6 and a static contact 7 . The driving mechanism 2 is used t...

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Abstract

The invention relates to the technical field of a circuit breaker, specifically to a small-sized circuit breaker. The circuit breaker comprises a contact assembly which comprises a movable contact (6) and a static contact (7), a driving mechanism (2) used for driving the movable contact (6) and the static contact (7) to switch on or switch off, an arc extinguishing apparatus (3) arranged on one side of the contact assembly, and a locking structure which is arranged at one end, equipped with a movable contact point, of the movable contact (6) or the arc extinguishing apparatus (3), wherein the locking structure performs locking of the movable contact (6) and the arc extinguishing apparatus (3) when the movable contact (6) moves to a position which is farthest from the static contact (7) in a switch-off direction, and performs unlocking when the driving mechanism (2) applies switch-on force to the movable contact (6). By virtue of the small-sized circuit breaker provided by the invention, electric arc re-ignition caused by the fact that the movable contact rebounds or even moves to a distance of electric arc breakdown when the movable contact is separated from the static contact and is in collision and contact with an arc striking plate can be avoided effectively.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a miniaturized circuit breaker. 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. A circuit breaker is generally composed of a contact system, an arc extinguishing system, an operating mechanism, a trip unit, and a housing. The function of the circuit breaker is to cut off and connect the load circuit, and cut off the faulty circuit, so as to prevent the expansion of the accident and ensure safe operation. When the moving and static contacts of the circuit breaker are under load or broken by a large current due to a fault, the voltage between the moving and static contacts will cause the air medium to discharge and form an arc. [0003] In order to ensure the reliable operat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/04H01H73/18
Inventor 李齐伟董微娜
Owner ZHEJIANG PEOPLE ELE APPLIANCE
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