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A High Reliability and Long Life Limit Interrupter

An arc extinguishing chamber and long-life technology, which is applied in the direction of electrical components, electric switches, circuits, etc., can solve the problems of reducing product life, reducing the contact area of ​​dynamic and static contacts, and increasing structural complexity, so as to achieve long life and ensure effective The effect of contact area

Active Publication Date: 2022-06-28
CHINA AEROSPACE TIMES ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the number of on-load switching increases, the spatter accumulates and adheres to the surface of the arc extinguishing chamber, which affects the insulation and withstand voltage performance of the arc extinguishing chamber, which in turn affects the insulation and withstand voltage performance between static contacts, and reduces the product life.
[0004] In addition, in order to prevent the moving contact from rotating, thereby avoiding the reduction of the contact area of ​​the moving and static contacts in the closed state, switching devices often need to increase the moving contact limit structure, which increases the complexity of the structure

Method used

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  • A High Reliability and Long Life Limit Interrupter
  • A High Reliability and Long Life Limit Interrupter
  • A High Reliability and Long Life Limit Interrupter

Examples

Experimental program
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Effect test

Embodiment 1

[0050] like figure 1 , In this embodiment, the high reliability and long life limit arc extinguishing chamber includes: an outer arc extinguishing chamber 1 , an inner arc extinguishing chamber 2 , two static contacts 3 and a moving contact 4 . Among them, the outer arc extinguishing chamber 1 and the inner arc extinguishing chamber 2 are nested and installed into one body, which are assembled and fixed by brazing; the movable contact 4 is arranged on the top of the outer arc extinguishing chamber 1; the two static contacts 3 are arranged at the bottom of the outer arc extinguishing chamber 1 , fixed by brazing assembly.

[0051] Preferably, the high-reliability and long-life limit arc-extinguishing chamber may further include: a driving rod 5 . The movable contact 4 is assembled and fixed with the drive system through the drive rod 5, so as to realize the switching function.

[0052] In a preferred embodiment of the present invention, as figure 2 , the outer arc-extinguis...

Embodiment 2

[0062] On the basis of the above-mentioned embodiment, the working process of the high-reliability and long-life limit arc extinguishing chamber is briefly described below: the driving system drives the moving contact 4 to go down and contacts with the two static contacts 3, so as to connect the moving contact The head 4 and the static contact 3 are connected in series in a loop to achieve closure; the driving system drives the moving contact 4 to go up and separate from the two static contacts 3 to achieve shutdown.

[0063] like Figure 8 As shown, when the moving contact 4 and the static contact 3 are disconnected, an arc is generated between the contacts, and the contacts are ablated to produce splashes; the internal contacts 16 of the static contact 3 and the moving contact 4 are always in the inner arc extinguishing chamber 2 intracavity. After the arc is broken, most of the splashes are attached to the cavity of the inner arc extinguishing chamber 2; since the inner ar...

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Abstract

The invention discloses a highly reliable and long-life limited arc extinguishing chamber, which comprises: an outer arc extinguishing chamber, an inner arc extinguishing chamber, two static contacts and a moving contact; the outer arc extinguishing chamber and the inner arc extinguishing chamber are nested and installed They are integrated into one body and fixed by brazing assembly; the moving contact is set on the top of the outer arc extinguishing chamber; the two static contacts are set on the bottom of the outer arc extinguishing chamber and fixed by brazing assembly. The high-reliability and long-life limiting interrupter disclosed by the invention can effectively reduce the impact of spatter on the insulation and withstand voltage of products, improve the product life, and realize contact limit at the same time.

Description

technical field [0001] The invention belongs to the technical field of high-power switch product design, and in particular relates to a high-reliability and long-life limit arc-extinguishing chamber. Background technique [0002] Studies have shown that when the contacts of high-power switch products are disconnected, a near-cylindrical arc that is extremely hot, emits strong light and can conduct electricity will be generated between the contacts. Therefore, there is often an arc extinguishing chamber structure around the switch contacts, which limits the arc space and accelerates the arc extinguishing, thereby reducing contact ablation. [0003] With the increase of load switching times, splashes accumulate and adhere to the surface of the arc extinguishing chamber, which affects the insulation and withstand voltage performance of the arc extinguishing chamber, which in turn affects the insulation withstand voltage performance between static contacts and reduces product li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/34
CPCH01H9/34
Inventor 李汪洋苌群峰郑国龙冯萃峰赵正阳赵鑫
Owner CHINA AEROSPACE TIMES ELECTRONICS CORP
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