CN2599733Y - Current-limiting mechanism for plastic shell circuit breaker - Google Patents
Current-limiting mechanism for plastic shell circuit breaker Download PDFInfo
- Publication number
- CN2599733Y CN2599733Y CNU022800107U CN02280010U CN2599733Y CN 2599733 Y CN2599733 Y CN 2599733Y CN U022800107 U CNU022800107 U CN U022800107U CN 02280010 U CN02280010 U CN 02280010U CN 2599733 Y CN2599733 Y CN 2599733Y
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- current
- movable contact
- contact
- limiting mechanism
- tension spring
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model relates to a current-limiting device of molded case circuit breaker, which comprises a base (1), a junction plate (2), an active contactor (3), a tension spring (4), a pressing baffle plate (5), a fixed contactor (6), a cover (8) and arc extinguish chamber (7). The utility model is characterized in that the active contactor (3) can depart from the fixed contactor (6) driven by electric repulsive force when high fault current occurs in the circuit. The novel current-limiting device is realized with the same volume of the original molded case circuit breaker. The utility model can restrict the action of short-circuit current, improve fault short-circuit capability of the product and improve safety performance and technical performance index of the product.
Description
Technical field
The utility model relates to the current-limiting mechanism of breaker of plastic casing, belongs to low-voltage electrical apparatus current-limiting mechanism field.
Background technology
Low-voltage electrical apparatus is power delivery indispensable link in user's the electric power system.Mainly in the low-pressure side of transformer to load-side, rise and distribute electric energy, protection and control the effect of distribution line is started, regulates, is stopped and showing and protect load, breaker of plastic casing belongs to a wherein class.Breaker of plastic casing is by plastic casing, rotating mechanism, contact system, compositions such as arc quenching system and tripping mechanism, and along with the continuous development of power industry, the continuous expansion of power capacity requires more and more higher to the breaking capacity of breaker of plastic casing.All current limiting technique and flow-restrictive material are being studied metallic vapour jet flow technology for example, double break rotation technique etc. all over the world.The appearance of these new technologies improves the short circuit breaking capacity of breaker of plastic casing and reliability greatly, shows after deliberation, tests, and increases a kind of new current-limiting mechanism, and the breaking capacity of circuit breaker improves greatly.
Summary of the invention
The purpose of this utility model provides a kind of current-limiting mechanism of breaker of plastic casing, and it plays limiting short-circuit current under the situation that keeps original breaker of plastic casing constancy of volume effect improves short circuit breaking capacity.
According to breaker of plastic casing current-limiting mechanism of the present utility model, mainly comprise pedestal, connecting plate, movable contact, fixed contact, arc control device and lid, it is characterized in that: described connecting plate is a fork connection conductor, the front end jaw is by the pivot pin connection and clamp movable contact, a spring is respectively placed in described pivot pin upper junction plate jaw both sides, place the fixed and fixing spring of a pad and rivet clasp by the described pivot pin and the other end, the pressure by described spring clamps connecting plate and movable contact and forms conductor, and the lower end riveting of described movable contact has an insulation spool, hang with a tension spring on the insulation axle, the tension spring other end hangs on the connecting plate,, the upper end contact of movable contact and fixed contact are in contact with one another and form a galvanic circle for the downward pulling force of movable contact by described tension spring; Arc control device are installed on movable contact and the fixed contact, and described arc control device have a plurality of arc extinguishing grid pieces and are fan-shaped array, and each arc extinguishing grid pieces is one " U " shape electrical pure iron plate, and makes it to surround described movable contact and fixed contact.
According to a preferred embodiment, current-limiting mechanism of the present utility model is provided with a baroreflex plate and is fixed in pedestal, is folding shape and holds described tension spring, and described arc control device and described tension spring physics are separated.More excellent is that described baroreflex plate is made by aromatic resin PBT.
According to a preferred embodiment, current-limiting mechanism of the present utility model can be realized under the situation that keeps former breaker of plastic casing constancy of volume.
According to a preferred embodiment, fixed contact described in the current-limiting mechanism of the present utility model is a heater element.
Owing to adopt this novel current-limiting mechanism, the breaker of plastic casing short circuit breaking capacity improves, and during its specified limit short circuit breaking capacity 400V, Icu brings up to 150kA from 100kA.Thereby the security performance of breaker of plastic casing and technical performance are improved.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing and example.
Fig. 1 is the utility model current-limiting mechanism overall structure schematic diagram.
Fig. 2 is the utility model current-limiting mechanism movable contact and fixed contact enlarged drawing.
Fig. 3 is Fig. 2 vertical view.
Fig. 4 is the utility model arc control device schematic diagrames.
Fig. 5 is Fig. 4 cutaway view.
Embodiment
Should be appreciated that feature and advantage that this is clearly demarcated will seem more clear clear by a following preferred embodiment, but the present invention not merely is limited to following embodiment.
Breaker of plastic casing current-limiting mechanism of the present utility model, mainly comprise pedestal 1, connecting plate 2, movable contact 3, fixed contact 6, arc control device 7 and cover 8, described connecting plate 2 is a fork connection conductor, the front end jaw is by pivot pin 9 connections and clamp movable contact 3, a spring 10 is respectively placed in described pivot pin 9 upper junction plates 2 jaw both sides, two springs 10 are sandwiched between the pad 11 of pivot pin 9 caps and pivot pin 9 cap corresponding end, rivet clasp dead axle pin 9 is with pad 11 and fixing spring 10, pressure by described spring 10 makes connecting plate 2 and movable contact 3 clampings form conductor, described movable contact 3 lower end rivetings have an insulation axle 12, hang with a tension spring 4 on the insulation axle 12, and tension spring 4 other ends hang on the connecting plate 2,, movable contact 3 upper end contacts and fixed contact 6 are in contact with one another and form a galvanic circle for the downward pulling force of movable contact 3 by described tension spring 4; Arc control device 7 are installed on movable contact 3 and the fixed contact 6, and described arc control device 7 have a plurality of arc extinguishing grid pieces and are fan-shaped array, and each arc extinguishing grid pieces is one " U " shape electrical pure iron plate, and makes it to surround described movable contact 3 and fixed contact 6.
Fixed contact 6 described in the utility model is heater elements.
Be provided with a baroreflex plate 5 in the utility model and be fixed in pedestal 1, be folding shape and hold described tension spring 4, and described arc control device 7 are separated with described tension spring 4 physics.Described baroreflex plate 5 is made by aromatic resin PBT.
The utility model is to realize under the situation of original breaker of plastic casing constancy of volume, thereby current-limiting mechanism and Switch main body are united two into one, and current-limiting mechanism is simple and practical.
In the utility model, pressure by described spring 10 makes connecting plate 2 and movable contact 3 clampings form conductor,, the upper end contact of movable contact 3 and fixed contact 6 are in contact with one another and form a galvanic circle for the downward pulling force of movable contact 3 by described tension spring 4.When breaking down electric current in the circuit, movable contact 3 forms a parallel conductor with fixed contact 6, and produces electrodynamic repulsion force, and when electric current repulsion during greater than the pulling force of tension spring 4, movable contact 3 leaves fixed contact 6, thereby plays the effect of fault current limiting.When the disjunction fault current, when leaving fixed contact 6, movable contact 3 produces electric arc, electric arc import ' U " among the arc extinguishing grid pieces 7b; arc extinguishing grid pieces 7b is divided into many series connection short arcs with electric arc; outwards spray; when arc spraying is cut apart many short arcs again when going to dissociate grid sheet 7a, thereby reaches the effect of extinguish arcs.Because the disjunction with fixed contact 6 plays an important role tension spring 4 for movable contact 3 in the utility model; in order to protect tension spring 4 to be provided with a baroreflex plate 5; the one end is fixed in pedestal 1; the other end leans against on the arc control device dividing plate; be folding shape and hold described tension spring 4; and described arc control device 7 are separated with described tension spring 4 physics, thereby prevent electrical arc erosion tension spring 4.On the other hand, described baroreflex plate 5 is made by aromatic resin PBT, and baroreflex plate 5 surfaces can produce steam when electric arc produced, and steam can force electric arc to enter arc control device fast, thereby reaches the effect of quick arc extinguishing.Adopt this novel current-limiting mechanism, during the specified limit short circuit breaking capacity 400V of breaker of plastic casing, Icu brings up to 150kA from 100kA, has improved the security performance and the technical performance of breaker of plastic casing.
Claims (5)
1. the current-limiting mechanism of a breaker of plastic casing, mainly comprise pedestal (1), connecting plate (2), movable contact (3), fixed contact (6), arc control device (7) and lid (8), it is characterized in that: described connecting plate (2) is a fork connection conductor, connect and clamp movable contact (3) by pivot pin (9), a spring (10) is respectively placed in described pivot pin (9) upper junction plate (2) jaw both sides, place the fixed and fixing spring of a pad (11) and rivet clasp by described pivot pin (9) and the other end, pressure by described spring (10) makes connecting plate (2) and movable contact (3) clamping formation conductor, described movable contact (3) lower end riveting has an insulation axle (12), hang with a tension spring (4) on the insulation axle (12), tension spring (4) other end hangs on the connecting plate (2),, the upper end contact of movable contact (3) and fixed contact (6) are in contact with one another and form a galvanic circle for the downward pulling force of movable contact (3) by described tension spring (4); Arc control device (7) are installed on movable contact (3) and the fixed contact (6), described arc control device (7) have a plurality of arc extinguishing grid pieces and are fan-shaped array, each arc extinguishing grid pieces is one " U " shape electrical pure iron plate, and makes it to surround described movable contact (3) and fixed contact (6).
2. current-limiting mechanism according to claim 1 is characterized in that having a baroreflex plate (5) to be fixed in pedestal (1), is folding shape and holds described tension spring (4), and described arc control device (7) and described tension spring (4) physics are separated.
3. current-limiting mechanism according to claim 2 is characterized in that described baroreflex plate (5) made by aromatic resin PBT.
4. current-limiting mechanism according to claim 1 is characterized in that remaining unchanged on the structural volume of described mechanism.
5. current-limiting mechanism according to claim 1 is characterized in that described fixed contact (6) is a heater element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022800107U CN2599733Y (en) | 2002-11-28 | 2002-11-28 | Current-limiting mechanism for plastic shell circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022800107U CN2599733Y (en) | 2002-11-28 | 2002-11-28 | Current-limiting mechanism for plastic shell circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2599733Y true CN2599733Y (en) | 2004-01-14 |
Family
ID=34150588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU022800107U Expired - Lifetime CN2599733Y (en) | 2002-11-28 | 2002-11-28 | Current-limiting mechanism for plastic shell circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2599733Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527209A (en) * | 2008-03-05 | 2009-09-09 | 穆勒建筑物自动化有限公司 | A switching device |
| CN102270555A (en) * | 2011-07-07 | 2011-12-07 | 西安交通大学 | Arc-extinguishing chamber of low-voltage circuit breaker |
-
2002
- 2002-11-28 CN CNU022800107U patent/CN2599733Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101527209A (en) * | 2008-03-05 | 2009-09-09 | 穆勒建筑物自动化有限公司 | A switching device |
| CN102270555A (en) * | 2011-07-07 | 2011-12-07 | 西安交通大学 | Arc-extinguishing chamber of low-voltage circuit breaker |
| CN102270555B (en) * | 2011-07-07 | 2014-08-06 | 西安交通大学 | Arc-extinguishing chamber of low-voltage circuit breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: DELIXI ELECTRIC LTD. Free format text: FORMER OWNER: DELIXI ELECTRIC APPLIANCES CO., LTD., ZHEJIANG PROV. Effective date: 20080530 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080530 Address after: Yueqing City, Zhejiang province Liushi Delixi high tech Industrial Park, zip code: 325604 Patentee after: Delixi Electric Co., Ltd. Address before: Yueqing City, Zhejiang province Liushi Delixi Industrial Park, zip code: 325604 Patentee before: Delixi Electrical Appliance Co., Ltd., Zhejiang |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121128 Granted publication date: 20040114 |