Combined magnetic-quenching device

A magnetic blowing arc extinguishing and arc extinguishing chamber technology, which is used in emergency protection devices, parts of protection switches, electrical components, etc. and other problems, to achieve the effect of simple structure, increased arc length, and full utilization

Active Publication Date: 2012-02-01
BEIJING JINGREN ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To further increase the arc length, the opening distance needs to be increased, which in turn leads to an increase in the size of the circuit breaker
[0006] Due to the limited volume of the circuit breaker itself, its breaking capacity will be limited, and the arc extinguishing capacity cannot be better improved

Method used

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Examples

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Embodiment Construction

[0024] The present invention will be described in detail below with reference to the drawings.

[0025] Such as Figure 1-5 Shown: In the one-pole arc extinguishing cavity 8 of the circuit breaker, an insulating support 3 is set, and the static contact 1 and the static contact 2 are installed on the insulating support 3, and the static contact 1 and the static contact 2 are insulated by the support 3 Reliable insulation. A contact point 11 is provided on the static contact 1 and a contact point 21 is provided on the static contact 2. The contact point 11 and the contact point 21 are placed side by side, and the movable contact 7 bridges the contact point 11 and the contact point 21. press figure 2 As shown, a conductive path can be formed from the left end of the static contact 1 to the right end of the static contact 2.

[0026] Two grid-type arc extinguishing chambers 6 are placed on the left side of the contact point 11 and the contact point 21, and the arc extinguishing cha...

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PUM

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Abstract

The invention relates to a combined magnetic-quenching device. The device comprises two fixed contacts, an insulation bracket, permanent magnet steel, a magnetic conduction board, a gate-chip type arc-extinguishing chamber and a moving contact. The combined magnetic-quenching device can fulfill the aims of speeding up an arc-extinguishing speed and improving the arc-extinguishing capacity in a simplest and easiest processing mode on the premise of not increasing the overall dimension of a breaker and reserving the structural form of a conventional breaker.

Description

Technical field [0001] The invention relates to a combined magnetic blowing arc extinguishing device, which belongs to the field of low-voltage electrical appliances. Background technique [0002] With the increasing demand for electrical energy, the use of high-power power supplies has increased the short-circuit current in the power grid, which has greatly exceeded the breaking capacity of traditional circuit breakers. It has become an inevitable trend of development to further reduce the size of the circuit breaker and improve the breaking capacity. [0003] There is an arc extinguishing device in the molded case circuit breaker, which is the core component when breaking. The common way to extinguish a DC arc is to increase the arc voltage. The usual ways to increase the arc voltage are: 1. Increase the total near-polar voltage drop and divide the arc into many series-connected short arcs with a grid-type arc extinguishing chamber; 2. Increase the arc length, increase the arc ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/00H01H73/18
Inventor 南寅朱金保李金英王洪刚
Owner BEIJING JINGREN ELECTRICAL CO LTD
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