CN202008970U - Miniature circuit breaker - Google Patents
Miniature circuit breaker Download PDFInfo
- Publication number
- CN202008970U CN202008970U CN2011200058822U CN201120005882U CN202008970U CN 202008970 U CN202008970 U CN 202008970U CN 2011200058822 U CN2011200058822 U CN 2011200058822U CN 201120005882 U CN201120005882 U CN 201120005882U CN 202008970 U CN202008970 U CN 202008970U
- Authority
- CN
- China
- Prior art keywords
- arc
- arc extinguishing
- extinguishing grid
- gas outlet
- circuit breaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a miniature circuit breaker which comprises a shell body, an operation mechanism, a contact, a wiring board and an arc extinguishing chamber. The arc extinguishing chamber comprises arc extinguishing grid sheets and an arc separating plate, wherein the arc separating plate comprises two arc separating side plates and an arc separating back plate; the front ends of the arc extinguishing grid sheets are provided with notches; the arc extinguishing grid sheets are arranged between two arc separating side plates at intervals; a plurality of air outlets are formed on the arc separating back plate; the arc separating back plate is arranged at the back surface of the arc extinguishing grid sheet; the air outlets are rectangular and are arrayed into two rows along the direction of the arc separating side plate in a staggered manner; and the length of the air outlet is more than the distance between two adjacent arc extinguishing grid sheets. As the cooling effect of the arc extinguishing chamber is increased by the expansive air outlets, the arc repeated breakdown phenomenon can be effectively inhibited, and the segmentation capability of the miniature circuit breaker is improved.
Description
Technical field
The utility model relates to a kind of miniature circuit breaker.
Background technology
U type that the arc control device of miniature circuit breaker are generally made by ferromagnetic material or V-type grid sheet and assemble by the flash barrier that insulating material is made.When miniature circuit breaker divides deenergizing to produce electric arc, because the existence of grid sheet, the magnetic flux path that arc current produces in the air around distorts, magnetized grid sheet produces electromagnetic force electric arc is pulled to arc control device, to the cutting apart and cool off of electric arc, arc resistance increases, and arc voltage is improved by the grid sheet, when arc voltage reached certain value, electric arc was extinguished.But the arc control device that adopt the grid sheet are when arc extinguishing, and flash barrier can not in time cool off thermal current and distributes, and the electric arc re-breakdown phenomenon can take place, cause arc voltage to fall rise with arc current, thereby prolong the arcing time, the current limiting performance variation influences the segmentation ability of miniature circuit breaker.
Summary of the invention
The purpose of this utility model is to overcome the defective of prior art, provides a kind of and can effectively suppress electric arc re-breakdown phenomenon, the miniature circuit breaker that the segmentation ability is high.
For achieving the above object, the utility model adopts a kind of miniature circuit breaker, comprise housing, operating mechanism, contact, terminal block and arc control device, arc control device comprise arc extinguishing grid pieces and flash barrier, flash barrier comprises two blocks of arc side plates and arc backboard, the arc extinguishing grid pieces front end offers notch, arc extinguishing grid pieces is disposed between two blocks of arc side plates, form a plurality of gas outlets on the arc backboard, the arc backboard is arranged on the arc extinguishing grid pieces back side, described gas outlet is a rectangle, and the gas outlet is staggered to two row along arc side plate direction, and the length of gas outlet is greater than the distance between two adjacent arc extinguishing grid pieces.
The beneficial effects of the utility model are cooling effectivenesss that the gas outlet of expansion has promoted arc control device, can effectively suppress the electric arc re-breakdown phenomenon, improve the segmentation ability of miniature circuit breaker.
The utility model further is set to described gas outlet and comprises three big gas outlets and two little gas outlets, the length of little gas outlet is less than half of the length of big gas outlet, row are arranged in a big gas outlet and two little gas outlets, and another row are arranged in two gas outlets.The set-up mode of gas outlet and arc backboard big or small suitable.
Description of drawings
Fig. 1 is the front view after the utility model embodiment removes loam cake.
Fig. 2 is the utility model embodiment arc control device stereograms.
Fig. 3 is the utility model embodiment arc control device left views.
Embodiment
As Fig. 1, shown in 2, specific embodiment of the utility model is a kind of miniature circuit breaker, comprise base 4, loam cake, operating mechanism, contact, terminal block and arc control device, operating mechanism, contact, terminal block and arc control device are arranged in the base 4, arc control device comprise arc extinguishing grid pieces 1 and flash barrier, flash barrier comprises two blocks of arc side plates 2 and arc backboard 3, arc extinguishing grid pieces 1 front end offers notch 11, arc extinguishing grid pieces 1 both sides all form two fixture blocks 12, corresponding arc extinguishing grid pieces 1 forms the suitable bayonet socket 22 of many groups and fixture block 12 uniformly on the arc side plate 2, arc extinguishing grid pieces 1 is disposed between two blocks of arc side plates 2 by the cooperation of fixture block 12 and bayonet socket 22, form a plurality of gas outlets on the arc backboard 3, the arc backboard is arranged on arc extinguishing grid pieces 1 back side, the gas outlet comprises three big gas outlets 31 and two little gas outlets 32, big gas outlet 31 is a rectangle, the length of big gas outlet 31 is greater than the distance of 1 of two adjacent arc extinguishing grid pieces, the length of little gas outlet 32 is less than half of the length of big gas outlet 31, the width of little gas outlet 32 is the same with big gas outlet 31, the gas outlet is staggered to two row along arc side plate 2 directions, row are arranged in a big gas outlet 31 and two little gas outlets 32, and another row are arranged in two gas outlets 31.
Claims (2)
1. miniature circuit breaker, comprise housing, operating mechanism, contact, terminal block and arc control device, arc control device comprise arc extinguishing grid pieces and flash barrier, flash barrier comprises two blocks of arc side plates and arc backboard, the arc extinguishing grid pieces front end offers notch, arc extinguishing grid pieces is disposed between two blocks of arc side plates, form a plurality of gas outlets on the arc backboard, the arc backboard is arranged on the arc extinguishing grid pieces back side, it is characterized in that: described gas outlet is a rectangle, the gas outlet is staggered to two row along arc side plate direction, and the length of gas outlet is greater than the distance between two adjacent arc extinguishing grid pieces.
2. miniature circuit breaker according to claim 1, it is characterized in that: described gas outlet comprises three big gas outlets and two little gas outlets, the length of little gas outlet is less than half of the length of big gas outlet, row are arranged in a big gas outlet and two little gas outlets, and another row are arranged in two gas outlets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200058822U CN202008970U (en) | 2011-01-08 | 2011-01-08 | Miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200058822U CN202008970U (en) | 2011-01-08 | 2011-01-08 | Miniature circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202008970U true CN202008970U (en) | 2011-10-12 |
Family
ID=44750629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200058822U Expired - Fee Related CN202008970U (en) | 2011-01-08 | 2011-01-08 | Miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202008970U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117727595A (en) * | 2024-02-07 | 2024-03-19 | 温州华嘉电器有限公司 | Arc extinguishing chamber of circuit breaker |
-
2011
- 2011-01-08 CN CN2011200058822U patent/CN202008970U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117727595A (en) * | 2024-02-07 | 2024-03-19 | 温州华嘉电器有限公司 | Arc extinguishing chamber of circuit breaker |
| CN117727595B (en) * | 2024-02-07 | 2024-04-26 | 温州华嘉电器有限公司 | Arc extinguishing chamber of circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111012 Termination date: 20170108 |