CN202373539U - Movable contact structure with high breaking capacity - Google Patents
Movable contact structure with high breaking capacity Download PDFInfo
- Publication number
- CN202373539U CN202373539U CN2011205478346U CN201120547834U CN202373539U CN 202373539 U CN202373539 U CN 202373539U CN 2011205478346 U CN2011205478346 U CN 2011205478346U CN 201120547834 U CN201120547834 U CN 201120547834U CN 202373539 U CN202373539 U CN 202373539U
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- CN
- China
- Prior art keywords
- movable contact
- moving contact
- arc
- contact structure
- breaking capacity
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Abstract
The utility model provides a movable contact structure with high breaking capacity. The movable contact structure comprises a movable contact conducting plate, a movable contact point and an arc bearing sheet. The movable contact structure is characterized in that the arc bearing sheet is arranged on a movable contact. By using the movable contact structure, when a short circuit generates and a circuit breaker breaks a short-circuit current, in an electric arc lasting process, the burning loss of the movable contact can be reduced; vaporized copper particles generated due to the burning loss can be reduced, so that the freeness in gas is decreased; the movable contact structure can quickly establish and recover a voltage; and the reignition of an electric arc between the contacts is prevented, so that the circuit breaker has higher rated short circuit breaking capacity.
Description
Technical field
The utility model relates to a kind of main contact structure of low-voltage circuit breaker.
Background technology
The electric current of low-voltage circuit breaker ability connection, carrying and disjunction under the normal circuit condition, the purpose of realization power supply, power failure and change-over circuit.When situation such as overload, short circuit occurring when electrical network, circuit breaker also can disjunction overload or short circuit current, load is broken off from electrical network, thereby avoid jeopardizing operating personnel's the safety or the normal operation of equipment.Circuit breaker is in breaking course, and electric arc between the dynamic and static contact through measures such as striking or arc blow-outs, is introduced arc quenching system with electric arc, finally realizes extinguishing of electric arc.
Along with the index of circuit breaker short circuit breaking capacity improves constantly, produce short circuiting arc between the dynamic and static contact and will become bigger, the dynamic and static contact of direct threats itself makes its scaling loss and causes arc extinguishing to be failed, to such an extent as to the circuit breaker loss of function.
Summary of the invention
The purpose of the utility model provides a kind of circuit breaker that makes and has the moving contact of higher specified short circuit breaking capacity.
In order to achieve the above object, the technical scheme of the utility model has provided a kind of moving contact structure of high breaking capacity, comprises the moving contact conductive plate, moving contact and year arc sheet.It is characterized in that: on moving contact, be provided with and carry the arc sheet.
Preferably, said moving contact can away from or near said year arc sheet.
Preferably, the inclined-plane is formed on the top of said moving contact conductive plate, and the arc sheet was located on this inclined-plane as the direction that moves as electric arc in said year.
Preferably, an end of said year arc sheet is connected the top of said moving contact conductive plate, and other end perk is moved as striking sheet pilot arc.
Original moving contact is not owing to carry the protection of arc sheet, and electric arc rests on the moving contact conductive plate, and the high temperature of electric arc (can reach more than 6000 ℃) is often with the conductive plate fusing, and vaporization forms copper particle.These copper particle are existed everywhere in arc control device, make that the blow-out condition in the arc control device aggravates, and behind current over-zero, restrike easily at this regional arc electrode.Carry arc sheet protection moving contact conductive plate and take on the carrying arcing, avoid electric arc, thereby improved blow-out environment in the arc control device, reduce the risk of arc reignition, make circuit breaker have higher specified short circuit breaking capacity moving contact conductive plate scaling loss.
The utility model is when being short-circuited; Circuit breaker in the electric arc time-continuing process, can reduce the moving contact scaling loss and produce the copper particle that is vaporized thus when the disjunction short circuit current; Thereby the freedom in the reduction gas; Make it set up recovery voltage rapidly, prevent restriking of electric arc between the contact, make circuit breaker have higher specified short circuit breaking capacity.
Description of drawings
First kind of version figure of the moving contact structure of a kind of high breaking capacity that Fig. 1 provides for the utility model;
Second kind of version figure of the moving contact structure of a kind of high breaking capacity that Fig. 2 provides for the utility model;
The third version figure of the moving contact structure of a kind of high breaking capacity that Fig. 3 provides for the utility model;
The 4th kind of version figure of the moving contact structure of a kind of high breaking capacity that Fig. 4 provides for the utility model;
The 5th kind of version figure of the moving contact structure of a kind of high breaking capacity that Fig. 5 provides for the utility model.
Embodiment
For making the utility model more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
As shown in Figure 1, the moving contact structure of a kind of high breaking capacity that the utility model provides partly is made up of moving contact 2, moving contact conductive plate 3 and year arc sheet 1 etc.On moving contact conductive plate 3, be formed with moving contact 2, carry the top that arc sheet 1 generally is in moving contact 2, this direction with final striking has direct relation.
Carry on the material that arc sheet 1 selects for use, at first should have certain electric conductivity, next has the performance of anti-scaling loss; Make it can resist the high temperature of electric arc; Prevent that metallic from producing, and for example, can select metal and alloy thereof like anti-scaling loss such as tungsten, molybdenum, tungsten or molybdenum alloy and tungsten or molybdenum powder metallurgy for use.Moving contact conductive plate 3 and carry between the arc sheet 1 multiple connected mode is arranged can be fixing etc. for welding or riveted joint or screw.
When breaker closing is worked, electric current flow through moving contact conductive plate 3 and moving contact 2.When the little electric current of circuit breaker disjunction, electric arc produces electric arc between dynamic and static contact, does not introduce arc control device as yet and just extinguishes rapidly, and when these operating modes, electric arc does not guide to year arc sheet as yet and just extinguishes; When circuit breaker disjunction overload or short circuit current; There is big electric arc between dynamic and static contact; Under effects such as striking sheet, blowout coil and air pressure inside; Short circuiting arc is introduced rapidly in the arc control device, and this moment, electric arc mainly existed between year arc sheet and the fixed contact striking sheet, and the centre is also by way of arc extinguishing grid pieces.At this moment, the electric arc on the moving contact rests on and carries on the arc sheet 1, is extinguished until electric arc.Therefore, year arc sheet 1 mainly when overload or short circuit take place in electric power system, during the circuit breaker disjunction, carries the effect of electric arc, and when operate as normal and on/off switch, it is not worked.The conducting electric current is born in acting as of moving contact conductive plate 3.Moving contact 2 is born the effect of conducting electric current and the general electric current of disjunction.
The another kind of version of the utility model is as shown in Figure 2, and moving contact 2 can reduce the scaling loss of moving contact with electric arc fast away from moving contact away from carrying arc sheet 1.Also have a kind of version as shown in Figure 3, moving contact 2 is near carrying arc sheets 1, this structure be fit to arc quenching system apart from contact system nearer, the less circuit breaker of striking effect.Other has angle that version such as Fig. 4 carry arc sheet 1 along the arc motion direction, is convenient to arc motion, and shown in Figure 5, carries arc sheet 1 except carrying arcing, also can be used as the striking sheet, and pilot arc gets into arc control device.
Claims (5)
1. the moving contact structure of a high breaking capacity comprises moving contact conductive plate (3), on moving contact conductive plate (3), is provided with moving contact (2), it is characterized in that: be provided with at the top of moving contact conductive plate (3) and carry arc sheet (1).
2. the moving contact structure of a kind of high breaking capacity as claimed in claim 1, it is characterized in that: said moving contact (2) was away from said year arc sheet (1).
3. the moving contact structure of a kind of high breaking capacity as claimed in claim 1 is characterized in that: the approaching said year arc sheet (1) of said moving contact (2).
4. the moving contact structure of a kind of high breaking capacity as claimed in claim 1 is characterized in that: the inclined-plane is formed on the top of said moving contact conductive plate (3), said year the arc sheet (1) be located on this inclined-plane.
5. the moving contact structure of a kind of high breaking capacity as claimed in claim 1 is characterized in that: said year the arc sheet (1) an end be connected the top of said moving contact conductive plate (3), other end perk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205478346U CN202373539U (en) | 2011-12-24 | 2011-12-24 | Movable contact structure with high breaking capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205478346U CN202373539U (en) | 2011-12-24 | 2011-12-24 | Movable contact structure with high breaking capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202373539U true CN202373539U (en) | 2012-08-08 |
Family
ID=46597233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205478346U Expired - Lifetime CN202373539U (en) | 2011-12-24 | 2011-12-24 | Movable contact structure with high breaking capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202373539U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522275A (en) * | 2011-12-24 | 2012-06-27 | 上海电器科学研究院 | Moving contact structure with high breaking capacity |
| CN106971927A (en) * | 2017-05-11 | 2017-07-21 | 嘉灵开关制造(中山)有限公司 | Breaker |
| US20180212416A1 (en) * | 2015-09-15 | 2018-07-26 | Siemens Aktiengesellschaft | Device for recognizing an arcing fault, and electrical switchgear |
-
2011
- 2011-12-24 CN CN2011205478346U patent/CN202373539U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102522275A (en) * | 2011-12-24 | 2012-06-27 | 上海电器科学研究院 | Moving contact structure with high breaking capacity |
| US20180212416A1 (en) * | 2015-09-15 | 2018-07-26 | Siemens Aktiengesellschaft | Device for recognizing an arcing fault, and electrical switchgear |
| US11095109B2 (en) * | 2015-09-15 | 2021-08-17 | Siemens Aktiengesellschaft | Device for recognizing an arcing fault, and electrical switchgear |
| CN106971927A (en) * | 2017-05-11 | 2017-07-21 | 嘉灵开关制造(中山)有限公司 | Breaker |
| CN106971927B (en) * | 2017-05-11 | 2018-09-11 | 嘉灵开关制造(中山)有限公司 | 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 |
Granted publication date: 20120808 |
|
| CX01 | Expiry of patent term |