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Arc extinguishing chamber for breaker

A technology of arc extinguishing chamber and circuit breaker, which is applied in the direction of circuit breaker components, circuits, electrical components, etc., which can solve the problems of affecting the breaking capacity of small circuit breakers, prolonging the arc burning time, and arc voltage drop, so as to suppress the severe arc strike Wear phenomenon, improve the effect of breaking capacity

Inactive Publication Date: 2008-12-10
LS INDAL SYST WUXI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the grid is used to extinguish the arc, the arc re-strike phenomenon is more serious, causing the arc voltage to drop and the arc current to rise, thereby prolonging the arcing time, deteriorating the current limiting performance, and affecting the breaking capacity of the miniature circuit breaker.

Method used

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  • Arc extinguishing chamber for breaker
  • Arc extinguishing chamber for breaker
  • Arc extinguishing chamber for breaker

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Embodiment Construction

[0011] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0012] As shown in the figure: the arc extinguishing chamber of the present invention is mainly composed of a left side plate 1, a right side plate 2, a rib 3, a rib 4, a slot 5, a slot 6, a rear panel 7, an air outlet 8, and a grid group 9. It is composed of arc extinguishing grid sheet 10, insulating plate 11, notch 12, notch 13 and so on.

[0013] The circuit breaker arc extinguishing chamber of the present invention includes a mounting case formed by a left side panel 1, a right side panel 2 and a rear panel 7. The right side wall of the left side panel 1 is provided with several ribs 3, and two adjacent ribs 3 Slot 5 is formed, and the left side wall of right side plate 2 is provided with some convex ribs 4, adjacent two convex ribs 4 form the slot 6 that cooperates with slot 5, is provided with air outlet 8 on rear panel 7, in each The slots 5 and slots ...

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Abstract

The invention relates to an arc extinguish chamber suitable for a limiting type minitype breaker having high capability of breaking short circuit, comprising a left side plate, a right side plate and an installation shell formed by a rear plate and characterized in that the left sidewall of the left side plate is provided with a plurality of convex edges, two adjacent convex edges forms a slot matched with the slot, a vent-hole is provided on the rear plate, groups of grid sheets are spliced within each group of mutually matched slots, plate bodies located at a top layer and a bottom layer in each group of the grid sheets are all arc extinguish grid sheets which are provided with notches, and an insulating plate is also provided with the notches, the notches on the arc extinguish grid sheets have the depth lower than that of the notches on the insulating plate. The invention can efficiently inhibit the phenomenon of re-puncture of the electric arc without change the volume of the original arc extinguish chamber, thereby boosting the breaking ability of the limiting type minitype breaker.

Description

technical field [0001] The invention relates to an arc extinguishing chamber for a low-voltage miniature circuit breaker, in particular to an arc extinguishing chamber suitable for a current-limiting miniature circuit breaker with high short-circuit breaking capacity. Background technique [0002] At present, miniature circuit breakers often use grid arc extinguishing technology. The arc extinguishing chamber is assembled by a U-shaped or V-shaped grid sheet made of ferromagnetic material and at least one side plate made of insulating material. When the miniature circuit breaker breaks the circuit and generates an arc, due to the existence of the grid, the magnetic flux path generated by the arc current in the surrounding air is distorted, and the magnetized grid generates an electromagnetic force that pulls the arc to the arc extinguishing chamber and passes through the grid. For the division and cooling of the arc, the arc resistance increases, so the arc voltage also inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18H01H9/34
Inventor 金香淑姜晓军
Owner LS INDAL SYST WUXI
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