CN202307747U - Contact system of breaker - Google Patents
Contact system of breaker Download PDFInfo
- Publication number
- CN202307747U CN202307747U CN2011204077860U CN201120407786U CN202307747U CN 202307747 U CN202307747 U CN 202307747U CN 2011204077860 U CN2011204077860 U CN 2011204077860U CN 201120407786 U CN201120407786 U CN 201120407786U CN 202307747 U CN202307747 U CN 202307747U
- Authority
- CN
- China
- Prior art keywords
- contact
- site
- contact site
- fixed
- moving
- 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
Links
Images
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model discloses a contact system of a breaker. The contact system comprises a movable contact, a fixed contact and a forcible arc separation member, wherein the movable contact is provided with a first contact part and a second contact part; correspondingly, the fixed contact is provided with a first contact part and a second contact part; the first contact part of the movable contact is in contact with the first contact part of the fixed contact; the second contact part of the movable contact is in contact or not in contact with the second contact part of the fixed contact, but the distance is greater than 2 mm when the second contact part of the movable contact is not in contact with the second contact part of the fixed contact; and the forcible arc separation member can be inserted or withdrawn between the first contact parts of the movable contact and the fixed contact. When the breaker is opened, the forcible arc separation member is inserted between the first contact parts of the movable contact and the fixed contact, and the spacing between the second contact parts of the movable contact and the fixed contact is greater than that between the first contact parts of the movable contact and the fixed contact; and according to the contact system, electric arc produced between the first contact parts is quickly struck to the second contact parts with large spacing, so that electric burning loss caused by electric arc to the first contact parts is reduced, the electric life of the breaker is prolonged, and meanwhile, the breaking capacity of the breaker is improved.
Description
Technical field
The utility model relates to a kind of breaker contact system, specifically relates to a kind of miniature circuit breaker contact system, belongs to the low-voltage electrical apparatus field.
Background technology
Low-voltage circuit breaker is as a kind of distribution apparatus that has a large capacity and a wide range; In distribution and protection circuit, play an important role, its effect is to distribute electric energy and protect electrical power distribution network and industrial equipment to avoid the destruction of electric currents such as short circuit, overload, under voltage and earth fault.Along with improving constantly of power industry and electricity consumption level, China's low-voltage circuit breaker has been proposed higher specification requirement, as the breaking capacity of one of circuit breaker key technical index, its requirement is also increasingly high.
The size of opening distance when dynamic/static contact breaks off directly determines the arcing length of fault current, and promptly arc resistance is big or small, and then directly has influence on the height of circuit breaker breaking capacity.But realize that dynamic/static contact opens the increasing of distance and need increase the circuit breaker volume to a certain extent; And circuit breaker develops to miniaturization, densification direction day by day at present; Therefore realize that through the mode that increases the circuit breaker volume large opening is worthless; How under the prerequisite that does not increase the circuit breaker volume, increase dynamic/static contact and open distance, and then improve the circuit breaker breaking capacity and become one of the focus of present research, emphasis problem.
The utility model content
Based on above-mentioned, the purpose of the utility model provides the contact system of the circuit breaker of a kind of high breaking capacity, high electric life, high reliability.
To between dynamic and static contact, produce electric arc during the circuit breaker breaking current; Electric arc is divided into four processes by producing to extinguish, and after electric arc was elongated to a certain degree, at this moment electric arc was under the electrodynamic action of self-excitation magnetic field generation; Leave contact and get into arc extinguishing grid pieces through arc angle; Final after arc voltage is greater than the supply voltage instantaneous value, electric current is forced and reduces, arc extinction.Can be found out by above analysis: the arc resistance size directly has influence on arc voltage and increases speed, further, directly has influence on the breaking capacity height of circuit breaker.
As everyone knows, open between the dynamic/static contact apart from big more, the arcing distance is long more during the disjunction fault current, and arc resistance is big more, and the circuit breaker breaking capacity is high more.The utility model is realized high breaking capacity and high electric life through the pressure arc insulating apparatus that two of dynamic/static contacts are opened apart from different contacts site and insulating material is processed.The concrete technical scheme of the utility model is following:
The utility model provides a kind of breaker contact system, comprises moving contact, fixed contact and pressure arc insulating apparatus, it is characterized in that:
Have first contact site and second contact site on the moving contact, correspondingly, have first contact site and second contact site on the fixed contact;
When first contact site of moving contact contacted with first contact site of fixed contact, second contact site of moving contact contacted with second contact site of fixed contact or does not contact, but the distance when not contacting is not more than 2mm;
Force arc insulating apparatus can insert or withdraw between dynamic and static contact first contact site.
Further:
When first contact site of moving contact contacted with first contact site of fixed contact, second contact site of moving contact lagged behind and contacts with second contact site of fixed contact.
When first contact site of moving contact contacts with first contact site of fixed contact, force that arc insulating apparatus is driven, withdraw between first contact site of fixed contact; When first contact site of moving contact separates with first contact site of fixed contact, force arc insulating apparatus to insert between first contact site of dynamic and static contact;
Force arc insulating apparatus to be processed by insulating material; First contact site of fixed contact is a silver alloy.
In addition:
First and second contacts site of moving contact are not on same horizontal plane.
On horizontal plane, first contact site of fixed contact is higher than second contact site of fixed contact; On vertical plane, the distance between second contact site of fixed contact and second contact site of moving contact is greater than the distance between first contact site of first contact site of fixed contact and moving contact.
Distance between place, first contact site face of first contact site of moving contact and fixed contact is less than the distance between place, first contact site face of second contact site of moving contact and fixed contact.
When circuit breaker breaks off; Have two contacts site between the dynamic/static contact; And will be forced to insert between dynamic/static contact first contact site by the pressure arc insulating apparatus that insulating material is processed, dynamic/static contact second contact site opens apart from greater than the distance of opening between first contact site, therefore when circuit breaker disjunction fault current generation electric arc simultaneously; The contact system of the utility model can be guided to the electric arc that between first contact site, produces rapidly the place, second contact site at large opening place; Thereby reduce the electric scaling loss of electric arc, improve the electric life of circuit breaker, improve the breaking capacity of circuit breaker simultaneously for first contact site.
Description of drawings
Contact system structure diagram when accompanying drawing 2 breaks off for circuit breaker.
Embodiment
The utility model provides a kind of breaker contact system, comprises moving contact, fixed contact and pressure arc insulating apparatus, wherein:
Have first contact site and second contact site on the moving contact, correspondingly, have first contact site and second contact site on the fixed contact; When moving contact first contact site contacted with fixed contact first contact site: moving contact second contact site contacted with fixed contact second contact site or does not contact, but the distance when not contacting is not more than 2mm; Force arc insulating apparatus can insert or withdraw between dynamic and static contact first contact site.
Further:
When moving contact first contact site contacted with fixed contact first contact site, moving contact second contact site lagged behind and contacts with fixed contact second contact site.
When moving contact first contact site contacted with fixed contact first contact site, the pressure arc insulating apparatus was driven, fixed contact withdraws between first contact site; When moving contact first contact site separates with fixed contact first contact site, force arc insulating apparatus to insert between dynamic and static contact first contact site; Force arc insulating apparatus to be processed by insulating material; First contact site of fixed contact is a silver alloy.
In addition:
First and second contacts site of moving contact are not on same horizontal plane.
On horizontal plane, first contact site of fixed contact is higher than second contact site of fixed contact; On vertical plane, the distance between second contact site of fixed contact and second contact site of moving contact is greater than the distance between first contact site of first contact site of fixed contact and moving contact.
Distance between place, first contact site face of first contact site of moving contact and fixed contact is less than the distance between place, first contact site face of second contact site of moving contact and fixed contact.
Introduce in detail below in conjunction with accompanying drawing.
With reference to accompanying drawing 1, the breaker contact system of the utility model comprises moving contact 1, fixed contact 2 and forces arc insulating apparatus 3.Fashionable when circuit breaker closing, both contact dynamic/static contact with B at upper and lower two position A, and A is the face contact in the present embodiment, and B is the line contact.The contact that is positioned at A place, first contact site on the fixed contact is the silvery alloy contact, and fashionable when circuit breaker closing, this contact contacts with first contact site of moving contact; The second contact site B that is positioned at below, first contact site on the fixed contact lags behind first contact site with moving contact second contact site and contacts, and also can not contact.When both first contacts site of dynamic/static contact contacted, second contact site did not contact in the present embodiment, and distance is less than 1mm.Simultaneously, the pressure arc insulating apparatus of being processed by insulating material 3 that is positioned at first contact site is driven around fixed axis rotation by moving contact, withdraws from between the dynamic/static contact, does not influence the circuit breaker normal electrical and connects.
With reference to accompanying drawing 2, when circuit breaker broke off, moving contact drives forced arc insulating apparatus 3 around fixed axis rotation, forces arc insulating apparatus 3 to force to insert between first contact site of dynamic/static contact.Therefore, when the disjunction fault current, produce electric arc between first contact site after; Force arc insulating apparatus that most of electric arc is cut off fast, arc resistance improves rapidly, and then arc voltage increases rapidly; Make the electric arc of fixed contact part move to second contact site rapidly along last arc angle, the electric arc of moving contact part also moves towards second contact site along following arc angle, and finally getting into arc control device extinguishes; Weakened the electric scaling loss of electric arc, improved the electric life of circuit breaker first contact site; Simultaneously because opening apart from greater than the distance of opening between first contact site between the second contact site dynamic/static contact; Be forced arc insulating apparatus and order about the electric arc disjunction rapidly that moves to second contact site; Quenching time is significantly reduced, and therefore can significantly improve the breaking capacity and the current limiting capacity of circuit breaker.
Claims (7)
1. a breaker contact system comprises moving contact, fixed contact and pressure arc insulating apparatus, it is characterized in that:
Have first contact site and second contact site on the moving contact, correspondingly, have first contact site and second contact site on the fixed contact;
When first contact site of moving contact contacted with first contact site of fixed contact, second contact site of moving contact contacted with second contact site of fixed contact or does not contact, but the distance when not contacting is not more than 2mm;
Force arc insulating apparatus can insert or withdraw between dynamic and static contact first contact site.
2. breaker contact system as claimed in claim 1 is characterized in that:
When first contact site of moving contact contacted with first contact site of fixed contact, second contact site of moving contact lagged behind and contacts with second contact site of fixed contact.
3. breaker contact system as claimed in claim 1 is characterized in that:
When first contact site of moving contact contacted with first contact site of fixed contact, the pressure arc insulating apparatus was driven, fixed contact withdraws between first contact site;
When first contact site of moving contact separates with first contact site of fixed contact, force arc insulating apparatus to insert between dynamic and static contact first contact site.
4. breaker contact system as claimed in claim 1 is characterized in that:
Force arc insulating apparatus to be processed by insulating material.
5. breaker contact system as claimed in claim 1 is characterized in that:
On horizontal plane, first contact site of fixed contact is higher than second contact site of fixed contact;
On vertical plane, the distance between second contact site of fixed contact and second contact site of moving contact is greater than the distance between first contact site of first contact site of fixed contact and moving contact.
6. breaker contact system as claimed in claim 2 is characterized in that:
Distance between place, first contact site face of first contact site of moving contact and fixed contact is less than the distance between place, first contact site face of second contact site of moving contact and fixed contact.
7. breaker contact system as claimed in claim 5 is characterized in that:
The material of first contact site of fixed contact is a silver alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204077860U CN202307747U (en) | 2011-10-24 | 2011-10-24 | Contact system of breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204077860U CN202307747U (en) | 2011-10-24 | 2011-10-24 | Contact system of breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202307747U true CN202307747U (en) | 2012-07-04 |
Family
ID=46376590
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204077860U Expired - Lifetime CN202307747U (en) | 2011-10-24 | 2011-10-24 | Contact system of breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202307747U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065894A (en) * | 2011-10-24 | 2013-04-24 | 首瑞（北京）投资管理集团有限公司 | Contact system of breaker |
-
2011
- 2011-10-24 CN CN2011204077860U patent/CN202307747U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065894A (en) * | 2011-10-24 | 2013-04-24 | 首瑞（北京）投资管理集团有限公司 | Contact system of breaker |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102486982A (en) | Breaker with forced flash barrier device | |
| CN204558301U (en) | A kind of arc quenching system with magnetic blow-out formula and air-sweeping type arc extinguishing structure | |
| CN201773805U (en) | Combined magnetic-quenching arc-extinguishing device | |
| CN202307747U (en) | Contact system of breaker | |
| CN212517099U (en) | Arc extinguishing chamber of circuit breaker | |
| CN201215780Y (en) | Contact tip component for high-voltage isolation switch | |
| CN105470067A (en) | Breaker provided with arc extinguishing mechanism with magnetic blowing and air-blowing functions | |
| CN103000465B (en) | Contact system of novel high-capacity medium-voltage direct current breaker | |
| CN204516637U (en) | Fixed contact | |
| CN201886996U (en) | Circuit breaker with compulsory arc partitioning device | |
| CN107527773B (en) | Universal circuit breaker with arc extinguishing performance | |
| CN203085442U (en) | Permanent-magnetic Arc blowing device for DC isolating switch | |
| CN103065894A (en) | Contact system of breaker | |
| CN112490094B (en) | Current-limiting type air direct current breaker arc extinguishing device and arc extinguishing method thereof | |
| CN201918328U (en) | Arc striking structure of miniature circuit breaker | |
| CN102915894B (en) | Arc-blowing device of direct-current circuit breaker | |
| CN207149504U (en) | A kind of Minitype electrical leakage breaker N poles arc quenching system | |
| CN202259104U (en) | Static contact of circuit breaker | |
| CN202871727U (en) | Arc blow-out apparatus of direct-current breaker | |
| CN201638770U (en) | Arc guiding structure for small-size breaker | |
| CN205911274U (en) | Miniature circuit breaker galvanic circle improvement structure | |
| CN205104467U (en) | High -voltage -dropout -type fuse cutout | |
| CN202259102U (en) | Moving contact of circuit breaker | |
| CN203931850U (en) | Novel control and protective switch contact system | |
| CN204497143U (en) | A kind of high-pressure vacuum breaker |
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: 20120704 |