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A small circuit breaker

A technology for small circuit breakers and shells, which is applied to parts and components of circuit breakers. It can solve the problems of reduced short-circuit breaking capacity, limiting the rising speed of arc voltage, and long movement time, so as to improve the rising speed of arc voltage and strengthen the arc blowing magnetic field. , the effect of simple structure

Active Publication Date: 2019-12-31
SHANGHAI LIANGXIN ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the above-mentioned technical defects of the arc running area of ​​the existing small circuit breaker. The arc travels for a long time before entering the grid, which limits the rising speed of the arc voltage and reduces the short-circuit breaking capacity.

Method used

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  • A small circuit breaker
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  • A small circuit breaker

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Embodiment

[0038] as attached figure 1 As shown, a small circuit breaker includes a housing 1, an operating mechanism 2, a contact system 3, an arc extinguishing chamber 4, a thermal tripping system 5, a sealing system 6 and an electromagnetic tripping system 7. The contact system 3 includes a moving contact 301, characterized in that: the sealing system 6 includes a first housing rib 601, a second housing rib 602 and a seal 603, the thermal tripping system 5 includes a bimetal 501, an electromagnetic tripping The buckle system 7 is located above the arc extinguishing chamber 4, the contact system 3 is located on the right side of the arc extinguishing chamber 4, the operating mechanism 2 is located on the right side of the electromagnetic tripping system 7 and the arc extinguishing chamber 4, and the arc striker 8 is located below the arc extinguishing chamber 4. One end extends into the abdomen of the arc extinguishing chamber 4, and the other end is connected with the bimetallic strip...

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Abstract

The invention relates to a small circuit breaker, which comprises a shell (1), an operating mechanism (2), a contact system (3), an arc extinguishing chamber (4), a heat tripping system (5), a sealingsystem (6) and an electromagnetic tripping system (7), wherein the contact system (3) comprises a moving contact (301) and a static contact (302). The small circuit breaker removes an arc running channel region, so that the voltage rising speed of electric arcs is greatly improved, and the short circuit breaking capacity is enhanced. The whole mechanism is great separation distance, the blastingmagnetic field is strong, the structure is simple, and the assembly is convenient.

Description

technical field [0001] The invention belongs to the field of low-voltage electrical appliances, and in particular relates to a small circuit breaker, which improves the breaking reliability and stability of the circuit breaker. Background technique [0002] Low-voltage circuit breakers are divided into miniature circuit breakers, molded case circuit breakers and air circuit breakers according to their scope of use. In theory, it is equivalent to the combination of fuse and relay, and generally does not need to change parts after breaking the fault current, and has been widely used. [0003] The traditional structure of miniature circuit breakers is generally divided into four areas: magnetic release area, operating mechanism area, arc extinguishing chamber area and arc running area. The dynamic and static contacts are located in the operating mechanism area and fixed on the operating mechanism. Between the head and the arc extinguishing chamber area is the arc track area. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/18
Inventor 向洪岗蒋武山彭琼王龙江
Owner SHANGHAI LIANGXIN ELECTRICAL
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