CN202651037U - Small-sized circuit breaker - Google Patents
Small-sized circuit breaker Download PDFInfo
- Publication number
- CN202651037U CN202651037U CN 201220299704 CN201220299704U CN202651037U CN 202651037 U CN202651037 U CN 202651037U CN 201220299704 CN201220299704 CN 201220299704 CN 201220299704 U CN201220299704 U CN 201220299704U CN 202651037 U CN202651037 U CN 202651037U
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- CN
- China
- Prior art keywords
- arc
- flash barrier
- circuit breaker
- magnetic conduction
- conduction sheet
- 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 - Lifetime
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a small-sized circuit breaker. The small-sized circuit breaker comprises an upper cover and a pedestal which form a housing, an operation apparatus, an electromagnetic trip mechanism, a contact system including a moving contact and a fixed contact, an arc extinguish chamber, and an arc striking system which strikes an electronic arc generated between the moving contact and the fixed contact into the arc extinguish chamber. The arc striking system comprises an upper flash barrier and a lower flash barrier which are disposed on the upper cover and a corresponding position in the pedestal correspondingly, an upper magnetic piece which is disposed between the upper flash barrier and the upper cover, a lower magnetic piece which is disposed between the lower flash barrier and the pedestal, and an arc striking piece. One end of the inner side surface of the upper flash barrier and one end of the inner side surface of the lower flash barrier are provided with an inclined plane which inclines inwardly. The small-sized circuit breaker has a reasonable structure, good arc extinguishing effect and high breaking capacity.
Description
Technical field
The utility model belongs to the breaker structure design field, is specifically related to a kind of miniature circuit breaker.
Background technology
When a certain part of path breaks down in the electrical network, just need to rely on circuit breaker with the circuitry cuts that breaks down.When the circuit breaker disjunction, can between the circuit breaker dynamic/static contact, producing electric arc, a large amount of heat that electric arc brings, if electric arc overstand scaling loss circuit breaker probably of a specified duration between dynamic/static contact, this just needs as early as possible electric arc is introduced the rapid blow-out of arc control device.
For can better blow-out, the common way of miniature circuit breaker is the disjunction region division magnetic blow-out system (being arc ignition system) at fixed contact and moving contact at present, this magnetic blow-out system is made of two magnetic conduction sheets that are separately positioned on circuit breaker drain pan and loam cake, the magnetic fields that the electric arc that produces between moving contact and fixed contact is produced by two magnetic conduction sheets, enter arc control device and carry out arc extinguishing and leave voltage contact area, the magnetic field force that right existing magnetic blow-out system produces is little, the movement velocity of electric arc is relatively slow, the moving contact scaling loss is serious, and breaking capacity is undesirable.
The utility model content
For above shortcomings in the background technology, the utility model provides a kind of rational in infrastructure, arc quenching effect good, breaking capacity is high miniature circuit breaker.
The technical scheme that realizes the utility model purpose is:
A kind of miniature circuit breaker comprises the loam cake that consists of housing and base, operating means, electromagnetic release mechanism, the contact system that is provided with moving contact and fixed contact, arc control device and the arc ignition system of the electric arc that produces between moving contact and the fixed contact being introduced arc control device; Described arc ignition system comprises upper flash barrier and the lower flash barrier that is installed in respectively loam cake and base correspondence position and is arranged on upper magnetic conduction sheet between described upper flash barrier and the loam cake, is arranged between described lower flash barrier and the base and is provided with lower magnetic conduction sheet and arc striking piece; Close arc control device one end of the medial surface of described upper flash barrier and lower flash barrier is provided with the to the inside inclined-plane of inclination.
In the technique scheme, described arc ignition system also comprises the magnetic conduction sheet that is arranged in the arc striking piece outside, and described middle magnetic conduction sheet is connected to form a U-shaped with described upper magnetic conduction sheet and lower magnetic conduction sheet respectively.
The utlity model has positive effect:
(1) end of the close arc control device of the up and down flash barrier in the arc ignition system of the miniature circuit breaker in the utility model is provided with the to the inside inclined-plane of inclination; Produced electric arc between dynamic/static contact before entering arc control device, increased the contact-making surface between electric arc and flash barrier, extinguish part electric arc, in addition because the bootable electric arc that exists on inclined-plane directly enters the arc control device middle part, be not allowed to condition at the front end burning of arc control device, extinguish arcs faster makes the disjunction better effects if of product.
(2) arc ignition system of the miniature circuit breaker in the utility model has increased middle magnetic conduction sheet, described middle magnetic conduction sheet and upper magnetic conduction sheet and lower magnetic conduction sheet form a U-shaped structure, when having electric arc to produce, its magnetic field intensity increases greatly, accelerate the movement velocity of electric arc, made electric arc enter the arc control device arc extinguishing within a short period of time, shortened the arcing time, improve the breaking capacity of circuit breaker, can effectively avoid contact burning; Adopt the 63A product of above-mentioned arc ignition system through evidence, short circuit breaking capacity is splendid, has good result of use.
Description of drawings
Fig. 1 is a kind of forward view of the middle-size and small-size circuit breaker of the utility model;
Fig. 2 is the cutaway view that Fig. 1 dissects along the A-A line;
Fig. 3 is the structural representation of upper flash barrier in the utility model;
Fig. 4 is the structural representation of lower flash barrier in the utility model;
Reference numeral shown in the figure is:
The 1-housing; The 11-loam cake; The 12-base; The 2-arc control device; The 3-arc ignition system; The upper flash barrier of 31-; Flash barrier under the 32-; The upper magnetic conduction sheet of 33-; Magnetic conduction sheet under the 34-; The 35-arc striking piece; The 36-inclined-plane; Magnetic conduction sheet among the 37-.
Embodiment
(embodiment 1)
Fig. 1 to Fig. 3 has shown a kind of embodiment of the present utility model.Wherein, Fig. 1 is a kind of forward view of the middle-size and small-size circuit breaker of the utility model; Fig. 2 is the cutaway view that Fig. 1 dissects along the A-A line; Fig. 3 is the structural representation of upper flash barrier in the utility model; Fig. 4 is the structural representation of lower flash barrier in the utility model.
A kind of miniature circuit breaker, as depicted in figs. 1 and 2, comprise the loam cake 11 that consists of housing 1 and base 12, operating means, electromagnetic release mechanism, the contact system that is provided with moving contact and fixed contact, arc control device 2 and the arc ignition system 3 of the electric arc that produces between moving contact and the fixed contact being introduced arc control device 2; Described arc ignition system 3 comprises upper flash barrier 31 and the lower flash barrier 32 that is installed in respectively loam cake 11 and base 12 correspondence positions and is arranged on upper magnetic conduction sheet 33 between described upper flash barrier 31 and the loam cake 11, is arranged on and is provided with lower magnetic conduction sheet 34 and arc striking piece 35 between described lower flash barrier 32 and the base 12; Close arc control device 2 one ends of the medial surface of described upper flash barrier 31 and lower flash barrier 32 are provided with the to the inside inclined-plane 36 of inclination, can be referring to Fig. 3 and Fig. 4.
Arc ignition system 3 in the present embodiment also comprises the magnetic conduction sheet 37 that is arranged in arc striking piece 36 outsides, and described middle magnetic conduction sheet 37 links to each other with lower magnetic conduction sheet 34 with described upper magnetic conduction sheet 33 respectively and forms a U-shaped.
Miniature circuit breaker in the present embodiment only needs the conventional circuit breaker internal structure is changed the effect that can reach good a little, and is with low cost.
Obviously, above-described embodiment of the present utility model only is for the utility model example clearly is described, and is not to be restriction to execution mode of the present utility model.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all execution modes exhaustive.And these belong to apparent variation or the change that connotation of the present utility model extends out and still belong to protection range of the present utility model.
Claims (2)
1. miniature circuit breaker comprises the loam cake that consists of housing and base, operating means, electromagnetic release mechanism, the contact system that is provided with moving contact and fixed contact, arc control device and the arc ignition system of the electric arc that produces between moving contact and the fixed contact being introduced arc control device; Described arc ignition system comprises upper flash barrier and the lower flash barrier that is installed in respectively loam cake and base correspondence position and is arranged on upper magnetic conduction sheet between described upper flash barrier and the loam cake, is arranged between described lower flash barrier and the base and is provided with lower magnetic conduction sheet and arc striking piece; It is characterized in that: close arc control device one end of the medial surface of described upper flash barrier and lower flash barrier is provided with the to the inside inclined-plane of inclination.
2. miniature circuit breaker according to claim 1 is characterized in that: described arc ignition system also comprises the magnetic conduction sheet that is arranged in the arc striking piece outside, and described middle magnetic conduction sheet is connected to form a U-shaped with described upper magnetic conduction sheet and lower magnetic conduction sheet respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220299704 CN202651037U (en) | 2012-06-20 | 2012-06-20 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220299704 CN202651037U (en) | 2012-06-20 | 2012-06-20 | Small-sized circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202651037U true CN202651037U (en) | 2013-01-02 |
Family
ID=47420102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220299704 Expired - Lifetime CN202651037U (en) | 2012-06-20 | 2012-06-20 | Small-sized circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202651037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064418A (en) * | 2014-04-25 | 2014-09-24 | 博耳(宜兴)电力成套有限公司 | Circulating air arc-control device for small breaker |
-
2012
- 2012-06-20 CN CN 201220299704 patent/CN202651037U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104064418A (en) * | 2014-04-25 | 2014-09-24 | 博耳(宜兴)电力成套有限公司 | Circulating air arc-control device for small breaker |
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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: 20130102 |