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Circuit breaker structure

A circuit breaker and casing technology, applied in the field of circuit breaker structure, can solve the problems of low product performance and poor reliability, and achieve the effects of convenient processing, simple assembly and mature technology

Pending Publication Date: 2019-03-29
213 ELECTRICAL APP SHANGHAI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many brands of 125A frame small circuit breakers in the market, but the performance of the general products is low, the reliability is poor, and it is impossible to provide customers with high-protection products.

Method used

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  • Circuit breaker structure
  • Circuit breaker structure
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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0040] Such as Figure 1 to Figure 13 As shown, the structure of the circuit breaker of the present invention includes: a four-bar linkage mechanism for driving contacts to close / open, a thermal trip (moving contact structure) for overload protection, and a magnetic release for short circuit protection. (Static contact structure), arc extinguishing system and other four main structures. The main parts are handle 1, rocker arm 2, crankshaft 3, torsion spring 4, mechanism shaft 5, lock catch 6, lever 7, ...

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Abstract

The circuit breaker structure of the invention comprises four main structure including a four-connecting-rod mechanism for closing / opening a contact, a thermal trip (moving contact structure) for overload protection, a magnetic trip-out device for short-circuit protection, and an arc extinguishing system, as well as parts for insulation and assembly limit, such as a bottom and an cover. The circuit breaker structure of the invention is a miniature circuit breaker of 125A case class, which has a mature manufacturing process and reliable product protection performance.

Description

technical field [0001] The invention belongs to the field of electrical technology, in particular to a circuit breaker structure. Background technique [0002] Terminal power distribution appliances are used in low-voltage power distribution systems and installed at circuit terminals for power distribution and protection of related circuits and electrical equipment. The characteristics of terminal power distribution appliances are relatively prominent, requiring convenient installation and disassembly, stable and reliable performance, strong economy, and modular structure, which can meet various functional requirements of modern power distribution. Miniature circuit breaker, referred to as MCB, is the most widely used terminal protection device in electrical terminal distribution devices. It is mainly used in places with AC 50Hz or 60Hz, rated voltage below 415V, and rated operating current below 125A, including single-pole 1P, two-pole 2P, three-pole 3P, four-pole 4P, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/24H01H73/04
CPCH01H71/24H01H73/04
Inventor 王靖马景渊李昌玲李自强刘玉春
Owner 213 ELECTRICAL APP SHANGHAI