CN1776872A - Arc-striking structure of low-voltage breaker contact system - Google Patents
Arc-striking structure of low-voltage breaker contact system Download PDFInfo
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- CN1776872A CN1776872A CN 200510111342 CN200510111342A CN1776872A CN 1776872 A CN1776872 A CN 1776872A CN 200510111342 CN200510111342 CN 200510111342 CN 200510111342 A CN200510111342 A CN 200510111342A CN 1776872 A CN1776872 A CN 1776872A
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- arc
- striking structure
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- striking
- contact
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Abstract
Characters of the contact system of breaker are that one piece of arc strike structure is added upper the moving contact of low voltage circuit breaker. The arc strike structure is a sheet metal matched to size of end head of conducting strip, and the sheet metal is contacted to the end head of conducting strip. Material selected by the arc strike structure is a sheet metal of tungsten, or a sheet metal of tungsten and molybdenum, or a sheet metal of alloy material.
Description
Technical field
The present invention relates to a kind of arc-striking structure (or citing approvingly the arc head) of low-voltage breaker contact system, belong to the low voltage electrical apparatus technology field.
Background technology
Low-voltage circuit breaker is mainly born overload, the under voltage of distribution line and equipment, the usefulness of short-circuit protection.
Low-voltage breaker contact system generally partly is made up of main contact, arcing contact, busbar and conducting strip etc.
Under normal circumstances, low-voltage breaker contact system is closed or disconnect the circuit of supply electric energy under the operating mechanism effect, to reach the purpose of power failure, power supply and change-over circuit.
When electrical network occurs under the short-circuit conditions, special under the specified short circuit breaking capacity situation that circuit breaker should be able to bear, the branch deenergizing of contact energy safety, protection electrical network or equipment.
Summary of the invention
The object of the present invention is to provide a kind of arc-striking structure (or citing approvingly the arc head) of low-voltage breaker contact system, owing to increase this arc-striking structure, can effectively reduce the striking sheet of arc control device and the metallic quantity between the contact, reduce the freedom in the gas, make it set up recovery voltage rapidly, prevent restriking of electric arc between the contact.Make low-voltage circuit breaker have higher specified short circuit breaking capacity.
For achieving the above object, technical scheme of the present invention is: increase a slice arc-striking structure (or citing approvingly the arc head) above each sheet moving contact of low-voltage circuit breaker, when the moving contact of low-voltage circuit breaker disconnects, be arranged parallel to each other between the striking sheet of arc-striking structure and arc control device, and have certain interval.The material selection resistivity of arc-striking structure more greatly, very high hardness and the metal or alloy material of heat resistance.
Beneficial effect of the present invention: because low-voltage breaker contact system has increased arc-striking structure, under short-circuit conditions, arc-striking structure can effectively reduce the striking sheet of arc control device and the metallic quantity between the contact, reduce the freedom in the gas, make it set up recovery voltage rapidly, prevent restriking of electric arc between the contact.Make low-voltage circuit breaker have higher specified short circuit breaking capacity, have certain economic benefits.
Description of drawings
Fig. 1 is the schematic diagram that each sheet moving contact top of low-voltage breaker contact system of the present invention increases a slice arc-striking structure;
Fig. 2 is the schematic diagram that concerns between the arc-striking structure of low-voltage breaker contact system of the present invention and the arc control device.
Embodiment
Below in conjunction with drawings and Examples to the detailed explanation of making comparisons of the arc-striking structure of low-voltage breaker contact system of the present invention.
With reference to Fig. 1, this is the schematic diagram that low-voltage breaker contact system moving contact of the present invention top increases arc-striking structure.
As shown in the figure, 1 is arc-striking structure (or citing approvingly the arc head), is positioned at the upper end of conducting strip 5 moving contacts 4, and is connected with it, and arc-striking structure is a kind of sheet metal, is that a kind of sheet conforms to the termination size of conducting strip; The right side of conducting strip 5 be main contact 4 contacted with it be fixed contact 3, fixed contact 3 is fixed on the busbar 2.
With reference to Fig. 2, this is the schematic diagram that concerns between the arc-striking structure of low-voltage breaker contact system of the present invention and the arc control device.
As shown in the figure, the top of arc-striking structure 1 (or citing approvingly the arc head) is arc control device, wherein striking sheet 8 and arc-striking structure 1 relative being arranged parallel to each other, and have certain interval.Both produce electric arc 6 when disjunction, the right side of striking sheet 8 is row's arc extinguishing grid pieces 9.
The metal or alloy material that the material selection resistivity of arc-striking structure (or citing approvingly the arc head) is big, hardness is high and heat resistance is good.The metal of the arc-striking structure of this low-voltage circuit breaker (or citing approvingly the arc head) material selection is the tungsten sheet, or the metal molybdenum sheet, or the tungsten alloy sheet.
Under normal connection and disjunction situation, arc-striking structure is inoperative, is conducted electricity by main contact during connection; Between main contact, produce electric arc during disjunction and extinguish.When being short-circuited, the low-voltage circuit breaker disjunction in this process, produces electric arc between main (or arc) contact, and under the acting in conjunction of arc leading angle, striking sheet and air pressure inside, electric arc enters arc control device fast.This moment, arc transfer was between arc-striking structure and the striking sheet.The arc-striking structure material property has determined it to have the performance of anti-scaling loss.Therefore,, produce metallic hardly, be formed with the environment that is beneficial to blow-out, fast extinguish arcs at the arc-striking structure place.
Under short-circuit conditions, arc-striking structure can effectively reduce the striking sheet of arc control device and the metallic quantity between the contact, as tungsten metallic quantity, reduces the freedom in the gas, makes it set up recovery voltage rapidly, prevents restriking of electric arc between the contact.Make low-voltage circuit breaker have higher specified short circuit breaking capacity.
Though the present invention describes with reference to the above embodiments; but those of ordinary skill in the art; will be appreciated that above embodiment is used for illustrating the present invention; should understand and wherein can make variations and modifications and do not break away from the present invention in a broad sense; so be not as limitation of the invention; as long as in connotation scope of the present invention, to the variation of above-described embodiment, the protection range that distortion all will fall into claim of the present invention.
Claims (4)
1, the arc-striking structure of low-voltage breaker contact system, the arc control device, busbar (2), moving main contact (4), quiet main contact (3), the conducting strip (5) that comprise breaker contact system, wherein arc control device contain arc extinguishing grid pieces (9), striking sheet (8), arc leading angle (7), it is characterized in that: above the moving contact of low-voltage circuit breaker, increase a slice arc-striking structure (1), this arc-striking structure is a kind of sheet metal, this sheet metal slabbing conforms to conducting strip termination size on the moving contact, and both become to contact shape.
2, the arc-striking structure of low-voltage breaker contact system as claimed in claim 1,
It is characterized in that: described arc-striking structure is a kind of tungsten sheet metal.
3, the arc-striking structure of low-voltage breaker contact system as claimed in claim 1,
It is characterized in that: described arc-striking structure is a kind of molybdenum sheet.
4, the arc-striking structure of low-voltage breaker contact system as claimed in claim 1,
It is characterized in that: described arc-striking structure is a kind of tungsten alloy material sheet metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510111342 CN1776872A (en) | 2005-12-09 | 2005-12-09 | Arc-striking structure of low-voltage breaker contact system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510111342 CN1776872A (en) | 2005-12-09 | 2005-12-09 | Arc-striking structure of low-voltage breaker contact system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1776872A true CN1776872A (en) | 2006-05-24 |
Family
ID=36766295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510111342 Pending CN1776872A (en) | 2005-12-09 | 2005-12-09 | Arc-striking structure of low-voltage breaker contact system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1776872A (en) |
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 |
| CN103426669A (en) * | 2013-09-02 | 2013-12-04 | 华坤电气有限公司 | Run-on plate |
| WO2015188596A1 (en) * | 2014-06-12 | 2015-12-17 | 德力西电气有限公司 | Movable contact bridge having arcing angle structure |
| CN108447749A (en) * | 2018-04-04 | 2018-08-24 | 上海电科电器科技有限公司 | Striking and race arc structure |
| CN113593994A (en) * | 2018-06-15 | 2021-11-02 | 上海电器科学研究所（集团）有限公司 | Conductive loop system with excellent magnetic blow effect |
-
2005
- 2005-12-09 CN CN 200510111342 patent/CN1776872A/en active Pending
Cited By (6)
| 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 |
| CN103426669A (en) * | 2013-09-02 | 2013-12-04 | 华坤电气有限公司 | Run-on plate |
| WO2015188596A1 (en) * | 2014-06-12 | 2015-12-17 | 德力西电气有限公司 | Movable contact bridge having arcing angle structure |
| CN108447749A (en) * | 2018-04-04 | 2018-08-24 | 上海电科电器科技有限公司 | Striking and race arc structure |
| CN108447749B (en) * | 2018-04-04 | 2023-09-12 | 上海电科电器科技有限公司 | Arc striking and running structure |
| CN113593994A (en) * | 2018-06-15 | 2021-11-02 | 上海电器科学研究所（集团）有限公司 | Conductive loop system with excellent magnetic blow effect |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |