Contact wrapping type arc striking structure and contact mechanism

A wrapping, contact technology, applied in the direction of contacts, contact shells/screens, electrical components, etc., can solve the problems of contact burnout, occupying space, and long arc retention time, avoiding movement and improving live use. Life, the effect of reducing arc damage

Pending Publication Date: 2021-03-19
SOUTHELEC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing arc striking device is either bulky, takes up space, and the effect of arc striking is not good, resulting in the residence time of the arc in the moving contact and the static contact being too long, thus easily causing contact burnout

Method used

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  • Contact wrapping type arc striking structure and contact mechanism
  • Contact wrapping type arc striking structure and contact mechanism
  • Contact wrapping type arc striking structure and contact mechanism

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Embodiments of the present invention will be further described below in conjunction with accompanying drawings:

[0022] Such as figure 1 As shown, a contact mechanism includes a correspondingly arranged moving contact assembly 10 and a static contact assembly 20, which is a bridge-type double-break point contact structure.

[0023] Such as Figure 2-3 As shown, the moving contact assembly 10 includes a moving contact plate 1, a moving contact 2, and a first arc striker 3; the contact plate 1 is a straight plate structure, and the contacts 2 are arranged on the contact plate 1 At both ends of the surface, the first arc-starting plate 3 is a straight plate structure compatible with the moving contact plate 1, and is installed on the upper surface of the moving contact plate 1, and the first arc-starting plate 3 is made of ferromagnetic material , and the two ends of the first arc starting plate 3 are formed with a first wrapping opening 31 suitable for the contact 2, t...

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PUM

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Abstract

The invention discloses a contact wrapping type arc striking structure and a contact mechanism. The structure is characterized in that an end tab matched with the structure of the contact plate is fixed on the contact plate, the end tab is made of ferromagnetic materials, a wrapping opening is formed in the end tab, and the contact is correspondingly arranged on the inner side of the wrapping opening. The structure has the advantages that the contact is arranged on the inner side of the wrapping opening, so that the contact is wrapped by the arc striking plate, the periphery of the contact isprotected by magnetic field force, an electric arc can be pushed away under the action of a magnetic field, the contact is protected, the electric arc damage is reduced, the arc striking plate is matched with the contact plate in structure, and the arc striking plate can be flush with a contact angle as much as possible. Therefore, the arc curve is prevented from moving, the arc can smoothly movealong the end tab, the arc is rapidly led into the arc extinguishing device, the breaking index of the circuit breaker is effectively improved, and the electrified service life of the contact is effectively prolonged.

Description

technical field [0001] The invention relates to an arc extinguishing and arc starting device of a circuit breaker, in particular to a contact wrapping type arc starting structure and a contact mechanism. Background technique [0002] When the moving and static contacts in the circuit breaker are separated due to a fault such as a short circuit in the circuit, an arc will be generated between the moving and static contacts, which delays the opening time of the switch, reduces the breaking performance of the switch, and even causes the circuit breaker to break. The load and circuit breaker components in the battery are severely burned. [0003] Therefore, in the contact mechanism, an arc strike structure is often provided, so that the arc generated when the moving and static contacts are separated can be quickly and smoothly introduced into the grid arc extinguishing chamber and extinguished. [0004] However, the existing arc striking device is either bulky, takes up space, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/64H01H1/54H01H9/44H01H9/34
CPCH01H1/54H01H1/64H01H9/34H01H9/44
Inventor 王震侯学强郑鹏夏刚强陈建东
Owner SOUTHELEC CO LTD
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