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Arc extinguish chamber of molded case circuit breaker

A technology for molded case circuit breakers and arc extinguishing chambers, which is applied to circuit breaker parts, circuits, electrical components, etc., to achieve the effects of improving arc extinguishing performance, increasing arc extinguishing magnetic field, and promoting deionization

Inactive Publication Date: 2018-03-13
JIANGSU PHONO ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems existing in the internal structure of the arc extinguishing chamber of the existing molded case circuit breaker, the present invention proposes a molded case circuit breaker with high structural strength, good heat resistance, convenient installation, easy maintenance and accelerated arc extinguishing. arc chamber

Method used

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  • Arc extinguish chamber of molded case circuit breaker
  • Arc extinguish chamber of molded case circuit breaker
  • Arc extinguish chamber of molded case circuit breaker

Examples

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Embodiment Construction

[0019] Such as figure 1 , 2 As shown in , 3, the upper part of the arc extinguishing chamber is a cover plate 6, and in the middle are several U-shaped metal grids 3 stacked horizontally with intervals up and down, and the static contacts 5 are directly below the metal grids 3. Right above the metal grid 3 is a U-shaped arc starter 2 , which is below the cover plate 6 and has a gap with the metal grid 3 . On the left and right sides of the U shape of the metal grid 3 and the arc striker 2, there is a vertical arc barrier 1, the metal grid 3 and the arc striker 2 are located between the two arc barriers 1, and the metal The left and right side walls of the grid piece 3 and the arc-starting piece 2 are fixedly clamped on two arc-breaking walls 1, and the metal grid piece 3 and the arc-leading piece 2 are fixed by the two arc-breaking walls 1.

[0020] On the inside of the U-shaped opening of the metal grid sheet 3 and the arc-starting sheet 2, a prefabricated sheet-shaped gas-...

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Abstract

The invention discloses an arc extinguish chamber structure of a low-voltage molded case circuit breaker. A plurality of U-shaped metal grid pieces are horizontally stacked at intervals from top to bottom in the middle of the extinguish chamber structure; a fixed contact is located right under the metal grid pieces; a U-shaped arc striking piece is arranged right above the metal grid pieces; a gapis formed between the U-shaped arc striking piece and the metal grid pieces; two up-and-down vertical arc isolating walls are separately arranged on a left side and a right side outside a U shape formed by the metal grid pieces and the arc striking piece; two up-and-down vertical air production pieces are separately and fixedly attached on the left inner side wall and the right inner side wall ofthe interior of a U-shaped opening formed by the metal grid pieces and the arc striking piece; the two air production pieces are parallel to each other and face each other. According to the arc extinguish chamber structure, the air production pieces are additionally mounted in the U-shaped opening formed by the metal grid pieces and the arc striking piece; airflow is generated by erosion of electric arc and is used for driving the electric arc; the pressure of the arc extinguish chamber is improved; the temperature of the electric arc is favorably reduced; the deionization of the electric arcis accelerated; the arc duration is reduced, so that the breaking capability of the circuit breaker can be greatly improved.

Description

technical field [0001] The invention relates to a low-voltage molded case circuit breaker in the field of power transmission and distribution, in particular to an arc extinguishing chamber structure of the molded case circuit breaker. Background technique [0002] Molded case circuit breaker includes components such as arc extinguishing device, tripping device, contact system and operating mechanism. The arc extinguishing chamber is an important component of the circuit breaker, its function is to extinguish the arc generated on the contact system, and the arc extinguishing grid is installed inside the arc extinguishing chamber. An arc will be generated when the moving and static contacts of the circuit breaker are separated. The moving route of the moving contact is inside the arc extinguishing chamber. Cutting into short arcs in series, thinning the arc and rapidly increasing the arc voltage, thereby extinguishing the arc. When the circuit breaker is short-circuited and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18H01H9/36
CPCH01H9/36H01H73/18
Inventor 胡义琴张海燕徐硕业
Owner JIANGSU PHONO ELECTRIC
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