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Arc-extinguishing device of the breaker

A technology of an arc extinguishing device and a circuit breaker, which is applied to circuit breaker parts, circuits, electrical components, etc., can solve the problems of inability to guarantee the air pressure conditions of the arc extinguishing chamber, and the inability to regulate the air pressure of the arc extinguishing chamber, and achieves low cost and structural Simple, effect with increased overlapping area

Active Publication Date: 2009-04-29
JIANGSU DAQO KFINE ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the gas flux of the porous cover plate is fixed, it cannot regulate the air pressure in the arc extinguishing chamber, so it cannot guarantee that the arc extinguishing chamber has ideal air pressure conditions during the arc extinguishing process.

Method used

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  • Arc-extinguishing device of the breaker
  • Arc-extinguishing device of the breaker
  • Arc-extinguishing device of the breaker

Examples

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Embodiment Construction

[0010] As shown in the figure, arc extinguishing grids 2 are installed in the housing 1 of the circuit breaker arc extinguishing device of the present invention, and they together form an arc extinguishing chamber. One end of the layer of elastic reeds is respectively fixed on the two side walls of the housing, the other ends of the two layers of elastic reeds are freely attached together, and the positions of the grid grooves 4 on the two layers of elastic reeds are staggered from each other in the horizontal direction.

[0011] When the air pressure in the arc extinguishing chamber is small, such as figure 1 , figure 2 As shown, the overlapping parts of the two layers of grid grooves 4 are small or not overlapped, so the gas flux is small, which is conducive to maintaining the air pressure in the arc extinguishing chamber; when the air pressure in the arc extinguishing chamber is high, as image 3 , Figure 4 As shown, since the free ends of the elastic reeds 3 are lifted...

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PUM

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Abstract

The invention belongs to low voltage electric equipment, it relates to breaker arc-control device which is used in low voltage breaker. The device includes shell and arc-control bar which is mounted in the cavum of the shell, two layers of elastic reed are set at the exhaust end of the shell, one end of the elastic reed is separately fixed to different side of the shell, the other end of the elastic reed is in free state and adhibited to each other, several bar grooves which are parallel with each other are set in the two layers of elastic reed, the bar grooves are staggered with each other in parallel direction. The invention is simple, action is reliable, and it not only can keep air pressure during the arc-control process, at the same time the pressure can be released automatically when the pressure is too big.

Description

technical field [0001] The invention belongs to low-voltage electrical equipment, and relates to a circuit breaker arc extinguishing device used in a low-voltage circuit breaker. Background technique [0002] The arc extinguishing device of the low-voltage circuit breaker generally includes an arc extinguishing chamber composed of an insulating shell, and a multi-layer arc extinguishing grid is arranged in the arc extinguishing chamber. When the arc of the circuit breaker occurs, the arc extinguishing device will generate Larger air pressure, a certain air pressure is conducive to arc extinguishing, but when the air pressure is too large, the pressure needs to be released. Ordinary arc extinguishing devices are generally provided with a porous cover plate at the exhaust end of the arc extinguishing grid as a channel for air pressure release. Since the gas flux of the porous cover plate is fixed, it cannot regulate the air pressure in the arc extinguishing chamber, and thus ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H73/18H01H9/30
Inventor 刘建军孙羽胡义琴
Owner JIANGSU DAQO KFINE ELECTRIC
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