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Air pressure arc-extinguishing device of the breaker

A technology of arc extinguishing device and circuit breaker, which is applied in the direction of circuit breaker components, circuits, electrical components, etc., which can solve the problems of inability to ensure the air pressure condition of the arc extinguishing chamber, control, and the inability to achieve the air pressure of the arc extinguishing chamber, and achieve low cost , Reliable action and simple structure

Active Publication Date: 2007-08-01
JIANGSU DAQO KFINE ELECTRIC
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Since the air flow rate of the porous cover plate is fixed, it cannot play a role in regulating the air pressure in the arc extinguishing chamber, so that it cannot ensure that the arc extinguishing chamber has an ideal air pressure condition during the arc extinguishing process.

Method used

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  • Air pressure arc-extinguishing device of the breaker

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Embodiment Construction

[0008] As shown in Figure 1, the housing 1 of the circuit breaker gas pressure arc extinguishing device of the present invention is equipped with an arc extinguishing grid 2, which together constitute an arc extinguishing chamber, and a metal cover plate with a vent hole is arranged on the top of the housing 3. There are two layers of porous metal plates 4 between the metal cover plate 3 and the arc extinguishing grid 2, and the sides of the two layers of porous metal plates are respectively connected to the side walls of the housing through compression springs as elastic elements 5.

[0009] As shown in Figure 2, the positions of the through holes 41 on the two-layer porous metal plates are staggered from each other. The through holes 41 have a vertical side wall 411 and an inclined side wall 412. The sloped sidewalls 412 of the holes are on different sides. In this way, when the air pressure acts on the inclined side wall 412, the direction of the horizontal component force ...

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Abstract

The invention belongs to low voltage electric equipment, it relates to breaker gas pressure arc-control device which is used in low voltage breaker. The device includes shell and arc blow-out gate which is mounted in the cavity of shell, metallic cover plate with vent hole is set on top of the shell; twp layers of porous metal plates which are inarching with each other are set between the metallic cover plate and arc blow-out gate, elastic cell which can make porous metal plates move horizontally is set between the edge of two layers of porous metal plates and side wall of the shell; the shape of elevation profile of porous metal plates is right-angle trapezium, that is via hole possesses a vertical side wall and a inclined side wall, the inclined side wall of via hole of upper layer porous metal plate and the inclined side wall of lower layer porous metal plate are in different side, and the position of via hole of upper and lower layer of porous metal plates is cross with each other. The invention is simple, and action is reliable, it can regulate and control the air pressure of arc-chute automatically.

Description

technical field [0001] The invention belongs to low-voltage electrical equipment, and relates to a circuit breaker air pressure 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 on the top of the arc extinguishing grid as a channel for air pressure release. Since the air flow rate of the porous cover plate is fixed, it cannot play a role in regulating the air pressure in the arc extin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18H01H9/30
Inventor 王立强郑改红徐晖王靖
Owner JIANGSU DAQO KFINE ELECTRIC
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