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Arc suppressing room of low voltage breaker

A low-voltage circuit breaker and arc-extinguishing chamber technology, applied in the field of arc-extinguishing chambers, can solve the problems of unfavorable mass production, unsatisfactory arc-extinguishing performance, difficult installation and positioning of metal plates and side walls, etc.

Active Publication Date: 2007-09-12
ZHEJIANG CHINT ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The installation and positioning between the metal plate and the side wall of this structure is more difficult, the process is more complicated, and it is not conducive to mass production
Another defect of it is that the arc extinguishing performance is still not ideal

Method used

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  • Arc suppressing room of low voltage breaker
  • Arc suppressing room of low voltage breaker
  • Arc suppressing room of low voltage breaker

Examples

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Embodiment Construction

[0023] Figure 1 shows a prior art arc extinguishing chamber. It can be seen from the figure that the “U”-shaped metal plate 3 has a plurality of sets of protrusions 30 on both sides of the edge, which cooperate with the corresponding openings 40 on the side walls 1 and 2, Due to the many and scattered matching points, the requirements for processing accuracy are quite high, and it also makes assembly difficult. Secondly, the arc extinguishing chamber is open, it is difficult to form a standard module, and it is impossible to carry out modular mass production.

[0024] Referring to Figures 2, 3(A) and 3(B), the arc extinguishing chamber of the present invention includes an arc extinguishing device 51 composed of a plurality of "U"-shaped metal plates 10, and the plurality of metal plates 10 is fixed by a pair of connecting strips 12 on both sides; the arc extinguishing device 51 is encapsulated in a box-shaped housing 18, 19 made of insulating material by riveting. The housing is c...

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Abstract

This invention relates to an arc-extinction chamber of a low voltage breaker including an arc-extinction device composed of multiple 'U'-like metal plates by a pair of connection strips at both sides. Said arc extinction device is packaged in a box shell made of insulation materials, a fixed electrode coordinating with the float electrode is set in the shell with a connecting terminal extending to outside of the shell. The shell has an air vent and an open-end to let the float electrode pass through. The box-shell structure turns the arc extinction chamber to a standard monopole unit and a module-like combined unit, convenient for production.

Description

Technical field [0001] The invention relates to a low-voltage electrical appliance, in particular to an arc extinguishing chamber of a molded low-voltage circuit breaker. Background technique [0002] The arc extinguishing chamber of the existing low-voltage circuit breaker, as shown in FIG. 1, usually includes two side walls 1 and 2 made of insulating materials and a plurality of metal plates 3. Each metal plate is usually "U"-shaped, and has a plurality of protrusions 30 on the outer edge, which are matched with the corresponding openings 40 on the side walls 1, 2 for the fastening and installation of the metal plate, and the proper guarantee of the arc extinguishing chamber Mechanical strength and stability. The installation and positioning between the metal plate and the side wall of this structure is difficult, the process is relatively complicated, and it is not conducive to mass production. Its another flaw is that the arc extinguishing performance is still not ideal. Sum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H9/36
Inventor 郭德鑫段育明李然李俐周小林
Owner ZHEJIANG CHINT ELECTRIC CO LTD
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