CN202549755U - Arc extinguishing system for plastic shell breaker with arc regurgitating preventing function - Google Patents
Arc extinguishing system for plastic shell breaker with arc regurgitating preventing function Download PDFInfo
- Publication number
- CN202549755U CN202549755U CN2012201384363U CN201220138436U CN202549755U CN 202549755 U CN202549755 U CN 202549755U CN 2012201384363 U CN2012201384363 U CN 2012201384363U CN 201220138436 U CN201220138436 U CN 201220138436U CN 202549755 U CN202549755 U CN 202549755U
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- arc
- separating wall
- breaker
- contact
- separating
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Abstract
The utility model discloses an arc extinguishing system for a plastic shell breaker with an arc regurgitating preventing function. The arc extinguishing system comprises a magnet yoke, a moveable contact, a static contact, an arc guiding sheet, an arc extinguishing chamber, an arc-separating plate, an arc-separating wall and a static contact rod, wherein magnetic conductive plates are respectively arranged on two sides of the arc guiding sheet; the arc-separating wall is sleeved on the magnetic conductive plates; the arc-separating wall outward extends for a certain length; when the breaker is located in a brake separating position, the contact arc-pulling areas of the moveable contact and the static contact are completely covered by the arc-separating wall; and when the arc extinguishing system is located in the brake separating position, an arc moves to an area under the contacts, so as to form effective protection for an electromagnetic system and an operation mechanism above the contacts. By adopting the structure, the air pressure under the contacts is increased, the dispersing of an air flow is reduced, a high-speed air flow is formed, the cooling for the arc and the quick driving for the arc to enter into the arc extinguishing chamber are boosted, and the short-circuit protection property of the breaker is increased.
Description
Technical field
The utility model relates to breaker of plastic casing, particularly a kind of arc quenching system of breaker of plastic casing.
Background technology
Traditional gas blast arc-quenching technology generally is used for primary cut-out, and for low-voltage circuit breaker, mainly through magnetic blow-out electric arc is driven and cool off.Up to 20 the end of the century people consider just the gas blast arc-quenching technology is applied to that the possibility of low-voltage circuit breaker, the design of the low-voltage circuit breaker arc control device of air-blowing have in recent years obtained using very widely.The air-blow technology of low-voltage circuit breaker mainly relies on the energy of electric arc; Make gas exhausted material emit a large amount of gases at short notice, cause the increased pressure of arc control device, the pressure differential between this pressure and the arc control device external atmosphere pressure just can form by the air-flow of arc control device through the gas outlet; This air-flow has two kinds of effects; A kind of is that electric arc is produced cooling effect, and another kind is that electric arc is produced actuating force, forces electric arc to get into arc extinguishing grid pieces.
In the existing breaker of plastic casing arc quenching system; Because arc separating wall length is lacked (as shown in Figure 1); When breaker open operation, arc separating wall can't block the arcing zone of moving contact and fixed contact fully, causes electric arc when the arc control device direction is blown, blowing (below be called electric arc regurgitate) toward the contact upper area easily; The mechanism and the electromagnetic system that so not only make circuit breaker are easily caused product slide fastener or product no power by electrical arc erosion.And because the amount of aerogenesis is certain, electric arc is regurgitated and can be caused the air pressure of contact below not enough, and the electric arc cooling rate is slack-off, and the speed that electric arc gets into arc control device also can correspondingly reduce, and then the current limiting capacity of circuit breaker is reduced.
The utility model content
To the deficiency of above-mentioned prior art, the purpose of the utility model provides a kind of breaker of plastic casing arc quenching system that arc protection is regurgitated function that has.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of have a breaker of plastic casing arc quenching system that arc protection is regurgitated function; Comprise yoke, moving contact, fixed contact, striking sheet, arc control device, flash barrier, arc separating wall, stationary contact bar; The said arc separating wall certain-length that stretches out; When circuit breaker was in the separating brake position, said arc separating wall covered the contact arcing zone of said moving contact, fixed contact fully.
Preferably, said arc separating wall is provided with retaining arc muscle.
Technique scheme has following beneficial effect: the arc separating wall of this breaker of plastic casing arc quenching system certain-length that stretches out; The area coverage of arc separating wall is strengthened; When circuit breaker is in the separating brake position; Arc separating wall can cover the contact arcing zone of moving contact, fixed contact fully, makes the regional movement of electric arc toward the contact below, so just can form effective protection to the electromagnetic system and the operating mechanism of contact top.Adopt this structure also can add the air pressure of big contact below, reduce the dispersion of air-flow, can form high velocity air, the cooling and the fast driving electric arc that help electric arc get into arc control device, promote the short-circuit protection performance of circuit breaker.
Above-mentioned explanation only is the general introduction of the utility model technical scheme; In order more to know the technological means of understanding the utility model; And can implement according to the content of specification, below this patent is elaborated with the preferred embodiments and the conjunction with figs. of the utility model.
Description of drawings
Fig. 1 is the structural representation of existing arc separating wall.
Fig. 2 is the structural representation of the utility model embodiment arc separating wall.
Fig. 3 is the structural representation of the utility model embodiment.
Embodiment
Describe in detail below in conjunction with the preferred embodiment of accompanying drawing to the utility model.
Like Fig. 2, shown in 3, this breaker of plastic casing arc quenching system comprises shell 5, is provided with several parts such as yoke 1, moving contact 2, fixed contact 3, stationary contact bar 4, striking sheet 6, arc control device 7, flash barrier 8, arc separating wall 9 in the shell 5.Arc separating wall 9 certain-length that stretches out wherein; The area coverage of arc separating wall 9 is strengthened (can know) like Fig. 1,2 contrasts; Arc separating wall 9 outward extending length should make circuit breaker when short circuit separating brake position, and arc separating wall 9 can cover the electric arc of 3 of moving contacts 2, fixed contact fully.The upper end of arc separating wall 9 also is provided with retaining arc muscle 91, and retaining arc muscle 91 can block the electric arc of outside spray.
The arc separating wall 9 of this breaker of plastic casing arc quenching system certain-length that stretches out; When circuit breaker is in the separating brake position; Arc separating wall 9 can cover the contact arcing zone of moving contact 2, fixed contact 3 fully; So just can make the regional movement of electric arc, thereby can form effective protection the electromagnetic system and the operating mechanism of contact top toward the contact below.The air pressure that adopts this structure also can add the big contact below is arranged again, reduce the dispersion of air-flow, can form high velocity air, the cooling and the fast driving electric arc that help electric arc get into arc control device, promote the short-circuit protection performance of circuit breaker.
More than a kind ofly had arc protection and regurgitate the breaker of plastic casing arc quenching system of function and carried out detailed introduction what the utility model embodiment provided; For one of ordinary skill in the art; According to the thought of the utility model embodiment, the part that on embodiment and range of application, all can change, in sum; This description should not be construed as the restriction to the utility model, and all any changes of being made according to the utility model design philosophy are all within the protection range of the utility model.
Claims (2)
1. one kind has the breaker of plastic casing arc quenching system that arc protection is regurgitated function; Comprise yoke, moving contact, fixed contact, striking sheet, arc control device, flash barrier, arc separating wall, stationary contact bar; It is characterized in that: the said arc separating wall certain-length that stretches out; When circuit breaker was in the separating brake position, said arc separating wall covered the contact arcing zone of said moving contact, fixed contact fully.
2. according to claim 1 have a breaker of plastic casing arc quenching system that arc protection is regurgitated function, it is characterized in that: said arc separating wall is provided with retaining arc muscle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201384363U CN202549755U (en) | 2012-04-01 | 2012-04-01 | Arc extinguishing system for plastic shell breaker with arc regurgitating preventing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201384363U CN202549755U (en) | 2012-04-01 | 2012-04-01 | Arc extinguishing system for plastic shell breaker with arc regurgitating preventing function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202549755U true CN202549755U (en) | 2012-11-21 |
Family
ID=47170344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201384363U Expired - Lifetime CN202549755U (en) | 2012-04-01 | 2012-04-01 | Arc extinguishing system for plastic shell breaker with arc regurgitating preventing function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202549755U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293460A (en) * | 2016-04-12 | 2017-10-24 | 上海良信电器股份有限公司 | A kind of circuit breaker arc isolation structure |
| CN107851976A (en) * | 2015-08-25 | 2018-03-27 | Zodiac航空电器 | Electric arc arc-control device and corresponding distribution system for three-phase power distribution system |
-
2012
- 2012-04-01 CN CN2012201384363U patent/CN202549755U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107851976A (en) * | 2015-08-25 | 2018-03-27 | Zodiac航空电器 | Electric arc arc-control device and corresponding distribution system for three-phase power distribution system |
| CN107293460A (en) * | 2016-04-12 | 2017-10-24 | 上海良信电器股份有限公司 | A kind of circuit breaker arc isolation structure |
| CN107293460B (en) * | 2016-04-12 | 2021-05-18 | 上海良信电器股份有限公司 | Circuit breaker arc isolation structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121121 |