Miniature DC Circuit Breaker

A DC circuit breaker, miniature technology, applied in the direction of circuit breaker components, circuits, electrical components, etc., can solve the problems of affecting the reliability of the work, the decline of the magnetic energy of the permanent magnet, etc., to solve the problem of magnetic energy decline, increase the voltage drop, and reduce the contact. The effect of electrical wear

Inactive Publication Date: 2011-11-30
SHENYANG 213 CONTROL ELECTRICAL APPLIANCE MFG
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an improved miniature DC circuit breaker, which solves the problems in the prior art that the magnetic energy of the permanent magnet decreases under the high temperature of the arc and affects the reliability of the work. Compared with similar products, it has a compact structure and a design Reasonable, can not only improve the working voltage and arc breaking ability, but also significantly reduce the electrical wear of the contacts and prolong the service life of the contacts

Method used

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Embodiment Construction

[0011] according to Figure 1~2 The specific structure of the present invention will be described in detail. The miniature DC circuit breaker is improved on the basis of the basic structure of the existing miniature DC circuit breaker. It includes the insulating base 1, the insulating cover 9 and the insulating base 1, the insulating cover of the existing miniature DC circuit breaker. The bimetal between the cover 9, the magnetic tripper, the handle, the locking mechanism, the soft connection (not shown in the figure), the moving contact 3, the static contact 4, the terminal terminal 2 and the arc extinguishing chamber 7 In addition to the basic structure, a magnetic blowing arc extinguishing device is mainly installed at the lower left of the terminal 2 of the outlet end of the arc generating area. The magnetic blowing arc extinguishing device is composed of a vertical rubidium iron boron rare earth permanent magnet 6 with high magnetic properties and two magnetic conductive ...

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Abstract

An improved miniature DC circuit breaker, which solves the problems in the prior art that the magnetic energy of the permanent magnet decreases under the high temperature of the arc and affects the reliability of the work. device, handle, locking mechanism, soft connection, moving contact, static contact, outlet terminal and arc extinguishing chamber. The technical points are: a vertically placed The magnetic blowing arc extinguishing device composed of a permanent magnet and two magnetic guide sheets, the N pole of the permanent magnet covered by a heat-insulating sleeve is facing upwards, and the S pole is facing down, which is seamlessly adsorbed on the conductors of the N and S extremes of the permanent magnet. The magnetic sheet and the arc shield made of heat-resistant materials are respectively packaged on the inner side of the insulating base and the insulating cover, and the arc starting angle is connected with the static contact and extended to the bottom of the arc extinguishing chamber. Its compact structure and reasonable design can not only improve the working voltage and arc breaking ability, but also significantly reduce the electrical wear of the contacts and prolong the service life of the contacts.

Description

Technical field [0001] The invention relates to a low-voltage electrical switch used in a DC power grid, in particular to an improved miniature DC circuit breaker. It is mainly used in power switching and circuit control places where the rated working voltage can reach kilovolts. Background technique [0002] At present, the miniature DC circuit breaker is a very extensive electrical switch used in the DC grid. When an overload or short-circuit fault occurs in the circuit, it can play a role in disconnecting the protected circuit. Generally, the single-pole (1P) interrupter has one contact room, while the two-pole (2P) has two contact rooms, and the four-pole (4P) has four contact rooms, which are combined into the same contact room. Arc extinguishing chambers are collectively referred to as multi-pole arc extinguishing chambers. With the continuous innovation and development of electrical switch technology, various miniature DC circuit breakers have appeared one after another....

Claims

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Application Information

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IPC IPC(8): H01H73/18H01H9/44
Inventor 刘勇尹显文白云飞邸威刘传亭
Owner SHENYANG 213 CONTROL ELECTRICAL APPLIANCE MFG
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