CN202712098U - Breaker arc-extinguishing device with protection against reverse current - Google Patents
Breaker arc-extinguishing device with protection against reverse current Download PDFInfo
- Publication number
- CN202712098U CN202712098U CN 201220410162 CN201220410162U CN202712098U CN 202712098 U CN202712098 U CN 202712098U CN 201220410162 CN201220410162 CN 201220410162 CN 201220410162 U CN201220410162 U CN 201220410162U CN 202712098 U CN202712098 U CN 202712098U
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- arc
- contact
- moving contact
- control device
- bimetallic element
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Abstract
The utility model discloses a breaker arc-extinguishing device with protection against reverse current. The breaker arc-extinguishing device comprises a static contact, a moving contact, an arc extinguishing chamber, an arc chute, a static-contact arc striking plate and a moving-static arc striking plate, wherein the arc extinguishing chamber is arranged under the static contact, the arc chute is arranged in the arc extinguishing chamber, and the static-contact arc striking plate and moving-static arc striking plate respectively extend upwards from the static contact and the moving contact to two ends of the arc chute. The static contact is electrically connected with an inlet wire binding post; and an outlet wire binding post and a bimetallic element are arranged in one side of the moving contact, wherein the bimetallic element is connected with the moving contact via a first soft connection wire. The breaker arc-extinguishing device is characterized in that a wiring board is fixed on the outlet wire binding post, and an electromagnetic field generating device positioned in one side of the arc extinguishing chamber is connected between the wiring board and the bimetallic element in series. According to the utility model, reverse-current arc generated by breaking of the a breaker can be effectively and rapidly led to the arc extinguishing chamber for extinguishing, thereby greatly improving the applicability of the breaker in dc circuits of photovoltaic power generation systems, enhancing operational safety and reliability of the dc circuits of photovoltaic power generation systems, and reducing the circuit cost.
Description
Technical field
The utility model relates to a kind of Arc Distinguishing Device for Circuit Breakers with the backward current protection.
Background technology
When circuit breaker divided deenergizing, the electric arc that produces between contact may cause the circuit breaker break-time to postpone, the scaling loss contact, even cause in severe case and catch fire and explode, arc-control device all is set in the circuit breaker for this reason.This arc-control device mainly is made of the arc control device that are positioned at fixed contact below, the run-on tab that places the arc-chute of arc control device and extend to the arc-chute two ends from quiet, moving contact respectively.Wherein fixed contact links to each other with the inlet wire binding post, and moving contact then links to each other with the outlet binding post through flexible connecting line, bimetallic element and terminal block successively, and bimetallic element then is connected with dynamic contact mechanism.Under normal circumstances, the electric current in the circuit is successively by end of incoming cables, fixed contact, moving contact, flexible connecting line, bimetallic element, terminal block and outlet binding post.When the circuit breaker disjunction causes between contact when producing electric arc, the effect of arc-initiating device is that electric arc is introduced arc-chute within the shortest time, and it is extinguished.
In the existing photovoltaic generating system, when cell panel is blocked or fault when causing photovoltaic string to lose efficacy, by an electric energy that is parallel to other photovoltaic strings generations that pass to inverter with respect to current absorption or the release of reverse flow under the reference condition, make normal photovoltaic string to the higher reverse current of fault photovoltaic string feed-in, easily produce the high heat of high temperature this moment, may damage photovoltaic module and circuit thereof, guarantee Electrical Safety so circuit breaker also must be installed.Yet the circuit breaker of installing in the DC circuit of above-mentioned photovoltaic generating system at present is owing to lack the function that can protect reverse current, circuit breaker divided have no progeny the reverse current electric arc that produces can't enter arc control device, thereby may cause the circuit breaker blast.Existing solution is to increase in addition in the line one group of reverse-current protection device, however high cost.
Summary of the invention
The utility model purpose is: a kind of Arc Distinguishing Device for Circuit Breakers with the backward current protection is provided; the reverse current electric arc that this device can produce the circuit breaker disjunction fast and effectively causes arc control device and extinguishes; thereby the safety and reliability of Effective Raise photovoltaic generating system DC circuit, and reduce circuit cost.
The technical solution of the utility model is: a kind of Arc Distinguishing Device for Circuit Breakers with the backward current protection, comprise quiet, moving contact, be positioned at the arc control device of fixed contact below, place the arc-chute in the arc control device and quiet, the moving contact run-on tab that extends to respectively the arc-chute two ends from quiet, moving contact; Wherein fixed contact is electrically connected with the inlet wire binding post, and the bimetallic element that the first side of movable contact arranges the outlet binding post and links to each other by the first flexible connecting line with moving contact, it is characterized in that being fixed with terminal block on the described outlet binding post, be in series with an electromagnetic field generation device that is positioned at arc control device one side between described terminal block and the bimetallic element.
Further preferred, the end that electromagnetic field generation device described in the utility model links to each other with terminal block links to each other with moving contact by the second flexible connecting line.The purpose of setting up the second flexible connecting line is that the main circuit at bimetallic element place in the circuit breaker is realized shunting in parallel, thereby effectively reduce the heating effect of current in the main circuit, especially when high short circuit current is arranged by main circuit, can guarantee the thermal stability of main circuit.And in normal operation of circuit breaker, shunting in parallel is beneficial to the reduction of circuit breaker temperature rise so that the effective internal resistance value of main circuit reduces, and reduces simultaneously the circuit breaker power consumption.
Electromagnetic field generation device described in the utility model specifically can be the spirality connecting plate, and the two ends of this spirality connecting plate link to each other with bimetallic element with terminal block respectively.During implementation, described spirality connecting plate can be formed by the bending of Cold-rolled Pure copper coin spiral, and its two ends are welded and fixed with terminal block and bimetallic element respectively, can certainly connect by wire.Described spirality connecting plate energising namely produces magnetic field.
Described electromagnetic field generation device also can be selected common helical coil, and the two ends of described helical coil link to each other with bimetallic element with terminal block respectively.
Certainly electromagnetic field generation device is not limited to above-mentioned two and enumerates form described in the utility model.
Further preferred, the top of arc control device described in the utility model and bottom all arrange flash barrier, bending has the U-shaped section that stretches in the arc control device on the described fixed contact run-on tab, and be fixed with a magnet steel in U-shaped section inboard, linking to each other with the flash barrier of arc control device top and bottom respectively up and down of this magnet steel, and the magnetic direction of this magnet steel is opposite because reverse current triggers the magnetic direction that forms with electromagnetic field generation device.
The effect of setting up magnet steel has two: 1, during the circuit breaker disjunction, the arc energy on the fixed contact is causing under the strong magnetic field action of magnet steel on the fixed contact run-on tab fast; 2, magnet steel forms a permanent magnetic field that is positioned at arc control device with arc control device flash barrier magnetization up and down, in case produce electric arc, this magnetic field will produce powerful magnetic blow-out, and electric arc is drawn in arc-chute fast.And the crooked design that goes out the U-shaped section can increase the arc-distribution space on the fixed contact run-on tab, is conducive to diffuse arc, also is conducive to strengthen to be positioned at the magnetic blow-out of the flash barrier of quiet, moving contact run-on tab upper and lower simultaneously.
Specific works principle of the present utility model is as follows:
Normally pass to rated direct current, and during normal operation of circuit breaker, electric current flows into from the inlet wire binding post, a part flows out from the outlet binding post behind fixed contact, moving contact, the first flexible connecting line, bimetallic element, electromagnetic field generation device and terminal block.Produce a magnetic field when electric current is flowed through electromagnetic field generation device, this magnetic field is consistent with the magnetic direction of magnet steel, is beneficial to magnetization flash barrier and produce magnetic blow-out, and faster electric arc is drawn in arc control device with magnetic field one same-action that magnet steel produces.
Otherwise, the short circuit reverse current in circuit, occurs, and electric current being when very large, electric current flows into from the outlet binding post, and a part flows out from the inlet wire binding post behind terminal block, electromagnetic field generation device, bimetallic element, the first flexible connecting line, moving contact and fixed contact.Because the short circuit reverse current is very large; when electric current is flowed through electromagnetic field generation device; to produce much larger than magnet steel magnetic field and the magnetic field of opposite direction; overcoming permanent magnetic field that magnet steel produces magnetizes the up and down flash barrier of arc control device; form the opposing magnetic field; the electric arc that forms because of reverse current between quiet, moving contact is drawn in arc control device fast extinguish, play arc quenching effect, protection circuit safety.
The utility model has the advantages that:
This Arc Distinguishing Device for Circuit Breakers with the backward current protection that the utility model provides; it can form magnetic field by the interior electromagnetic field generation device of establishing; the electric arc that forms because of reverse current between circuit breaker is quiet, moving contact fast and effectively causes arc control device and extinguishes; thereby greatly promote the applicability of circuit breaker in the photovoltaic generating system DC circuit; simultaneously also strengthen photovoltaic generating system DC circuit Operation safety and reliability, and reduced circuit cost.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is a kind of implementation structural representation of electromagnetic field generation device in the utility model.
Wherein: 1, fixed contact; 2, moving contact; 3, arc control device; 4, arc-chute; 5, fixed contact run-on tab; 6, moving contact run-on tab; 7, inlet wire binding post; 8, binding post appears; 9, the first flexible connecting line; 10, bimetallic element; 11, terminal block; 12, the second flexible connecting line; A, electromagnetic field generation device; 13, spirality connecting plate; 14, magnet steel.
Embodiment
Embodiment: the embodiment of this Arc Distinguishing Device for Circuit Breakers with the backward current protection that is illustrated in figure 1 as that the utility model provides, the same with the arc-control device layout in the conventional circuit breaker, it has fixed contact 1 and the moving contact 2 of positioned opposite, the below of fixed contact 1 arranges arc control device 3, the arc control device 3 interior arc-chutes 4 that arrange; Be fixed with respectively fixed contact run-on tab 5 and moving contact run-on tab 6 on described fixed contact 1 and the moving contact 2, described fixed contact run-on tab 5 and moving contact run-on tab 6 extend to respectively arc-chute 4 two ends.Described fixed contact 1 is electrically connected with the inlet wire binding post 7 of one side, and the bimetallic element 10 that moving contact 2 one sides arrange outlet binding post 8 and link to each other by the first flexible connecting line 9 with moving contact 2, the same with routine techniques, described bimetallic element 10 cooperates with moving contact tripping mechanism (not shown in FIG.), is used for triggering its action of threading off.
Improvement of the present utility model is: be fixed with terminal block 11 on the described outlet binding post 8, be in series with an electromagnetic field generation device A who is positioned at arc control device 3 one sides between described terminal block 11 and the bimetallic element 10.Specifically in conjunction with shown in Figure 2, electromagnetic field generation device A in the present embodiment is spirality connecting plate 13, this spirality connecting plate 13 is specifically formed through the spiral bending by the Cold-rolled Pure copper coin of 0.8mm thickness, and its two ends are welded and fixed with terminal block 11 and bimetallic element 10 respectively.These spirality connecting plate 13 energisings namely produce magnetic field.
The connecting plate 13 of spirality described in the present embodiment links to each other with moving contact 2 by the second flexible connecting line 12 simultaneously with an end of terminal block 11 welding.The purpose of setting up the second flexible connecting line 12 is that the main circuit at 10 places of bimetallic element in the circuit breaker is realized shunting in parallel, thereby effectively reduce the heating effect of current in the main circuit, especially when high short circuit current is arranged by main circuit, can guarantee the thermal stability of main circuit.And in normal operation of circuit breaker, shunting in parallel is beneficial to the reduction of circuit breaker temperature rise so that the effective internal resistance value of main circuit reduces, and reduces simultaneously the circuit breaker power consumption.
The top of arc control device described in the present embodiment 3 and bottom all arrange flash barrier, bending has the U-shaped section that stretches in the arc control device 3 on the described fixed contact run-on tab 5, and be fixed with a magnet steel 14 in U-shaped section inboard, linking to each other with the flash barrier (not shown in FIG.) of arc control device 3 tops and bottom respectively up and down of this magnet steel 14, and the magnetic direction of this magnet steel 14 is opposite because reverse current triggers the magnetic direction that forms with electromagnetic field generation device A.The effect of setting up magnet steel 14 has two: 1) during the circuit breaker disjunction, the arc energy on the fixed contact 1 is causing under the strong magnetic field action of magnet steel 14 on the fixed contact run-on tab 5 fast; 2) magnet steel 14 forms a permanent magnetic field that is positioned at arc control device 3 with the flash barrier magnetization of arc control device about in the of 3, in case produce electric arc, this magnetic field will produce powerful magnetic blow-out, and electric arc is drawn in arc-chute 4 fast.And the crooked design that goes out the U-shaped section can increase the arc-distribution space on the fixed contact run-on tab 5, is conducive to diffuse arc, also is conducive to strengthen to be positioned at the magnetic blow-out of the flash barrier of quiet, moving contact run-on tab 5,6 upper and lowers simultaneously.
Specific works principle of the present utility model is as follows:
Normally pass to rated direct current, and during normal operation of circuit breaker, electric current flows into from inlet wire binding post 7, and a part flows out from outlet binding post 8 behind fixed contact 1, moving contact 2, the first flexible connecting line 9, bimetallic element 10, spirality connecting plate 13 and terminal block 11.Produce a magnetic field when electric current is flowed through spirality connecting plate 13, this magnetic field is consistent with the magnetic direction of magnet steel 14, is beneficial to magnetization flash barrier and produce magnetic blow-out, and faster electric arc is drawn in arc control device 3 with magnetic field one same-action that magnet steel 14 produces.
Otherwise, the short circuit reverse current appears in circuit, and when electric current was very large, electric current flowed into from outlet binding post 8, and a part flows out from inlet wire binding post 7 behind terminal block 11, spirality connecting plate 13, bimetallic element 10, the first flexible connecting line 9, moving contact 2 and fixed contact 1.Because the short circuit reverse current is very large; when electric current is flowed through spirality connecting plate 13; to produce much larger than magnet steel 14 magnetic fields and the magnetic field of opposite direction; overcoming permanent magnetic field that magnet steel 14 produces magnetizes the up and down flash barrier of arc control device 3; form the opposing magnetic field; quiet, moving contact 1,2 electric arcs that form because of reverse current are drawn in fast arc control device 3 and extinguished, play arc quenching effect, protection circuit safety.
Certainly above-described embodiment only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the people who is familiar with technique can understand content of the present utility model and according to this enforcement, can not limit protection range of the present utility model with this.All equivalent transformation or modifications of doing according to the Spirit Essence of the utility model main technical schemes all should be encompassed within the protection range of the present utility model.
Claims (5)
1. Arc Distinguishing Device for Circuit Breakers with backward current protection, comprise quiet, moving contact (1,2), be positioned at the arc control device (3) of fixed contact (1) below, place the arc-chute (4) in the arc control device (3) and quiet, the moving contact run-on tab (5,6) that extends to respectively arc-chute (4) two ends from quiet, moving contact (1,2); Wherein fixed contact (1) is electrically connected with inlet wire binding post (7), and the bimetallic element (10) that moving contact (2) one sides arrange outlet binding post (8) and link to each other by the first flexible connecting line (9) with moving contact (2), it is characterized in that being fixed with on the described outlet binding post (8) terminal block (11), be in series with an electromagnetic field generation device (A) that is positioned at arc control device (3) one sides between described terminal block (11) and the bimetallic element (10).
2. the Arc Distinguishing Device for Circuit Breakers with the backward current protection according to claim 1 is characterized in that the end that described electromagnetic field generation device (A) links to each other with terminal block (11) links to each other with moving contact (2) by the second flexible connecting line (12).
3. the Arc Distinguishing Device for Circuit Breakers with backward current protection according to claim 1 and 2; it is characterized in that described electromagnetic field generation device (A) is spirality connecting plate (13), the two ends of this spirality connecting plate (13) link to each other with bimetallic element (10) with terminal block (11) respectively.
4. the Arc Distinguishing Device for Circuit Breakers with the backward current protection according to claim 1 and 2 is characterized in that described electromagnetic field generation device (A) is helical coil, and the two ends of this helical coil link to each other with bimetallic element (10) with terminal block (11) respectively.
5. the Arc Distinguishing Device for Circuit Breakers with backward current protection according to claim 1 and 2; the top and the bottom that it is characterized in that described arc control device (3) all arrange flash barrier; the upper bending of described fixed contact run-on tab (5) has the U-shaped section that stretches in the arc control device (3); and be fixed with a magnet steel (14) in U-shaped section inboard; linking to each other with the flash barrier of arc control device (3) top and bottom respectively up and down of this magnet steel (14), and the magnetic direction of this magnet steel (14) is opposite because reverse current triggers the magnetic direction that forms with electromagnetic field generation device (A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410162 CN202712098U (en) | 2012-07-27 | 2012-07-27 | Breaker arc-extinguishing device with protection against reverse current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410162 CN202712098U (en) | 2012-07-27 | 2012-07-27 | Breaker arc-extinguishing device with protection against reverse current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202712098U true CN202712098U (en) | 2013-01-30 |
Family
ID=47592375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220410162 Withdrawn - After Issue CN202712098U (en) | 2012-07-27 | 2012-07-27 | Breaker arc-extinguishing device with protection against reverse current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202712098U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789931A (en) * | 2012-07-27 | 2012-11-21 | 法泰电器（江苏）股份有限公司 | Arc extinguishing device of circuit breaker with reverse current protection |
| CN103441049A (en) * | 2013-09-06 | 2013-12-11 | 华坤电气有限公司 | Arc ignition structure reinforcing self-excitation magnetic field intensity |
| CN104332368A (en) * | 2014-11-06 | 2015-02-04 | 徐浩清 | Current-limiting small-sized breaker |
| CN104347326A (en) * | 2013-07-26 | 2015-02-11 | 西门子公司 | Switching device |
| CN104425194A (en) * | 2013-08-28 | 2015-03-18 | 施耐德电器工业公司 | DC circuit breaker |
-
2012
- 2012-07-27 CN CN 201220410162 patent/CN202712098U/en not_active Withdrawn - After Issue
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789931A (en) * | 2012-07-27 | 2012-11-21 | 法泰电器（江苏）股份有限公司 | Arc extinguishing device of circuit breaker with reverse current protection |
| CN102789931B (en) * | 2012-07-27 | 2015-03-25 | 法泰电器（江苏）股份有限公司 | Arc extinguishing device of circuit breaker with reverse current protection |
| CN104347326A (en) * | 2013-07-26 | 2015-02-11 | 西门子公司 | Switching device |
| CN104347326B (en) * | 2013-07-26 | 2018-12-04 | 西门子公司 | Switching device |
| CN104425194A (en) * | 2013-08-28 | 2015-03-18 | 施耐德电器工业公司 | DC circuit breaker |
| CN104425194B (en) * | 2013-08-28 | 2017-08-11 | 施耐德电器工业公司 | A kind of dc circuit breaker |
| CN103441049A (en) * | 2013-09-06 | 2013-12-11 | 华坤电气有限公司 | Arc ignition structure reinforcing self-excitation magnetic field intensity |
| CN103441049B (en) * | 2013-09-06 | 2015-07-22 | 浙江大华电气有限公司 | Arc ignition structure reinforcing self-excitation magnetic field intensity |
| CN104332368A (en) * | 2014-11-06 | 2015-02-04 | 徐浩清 | Current-limiting small-sized breaker |
| CN104332368B (en) * | 2014-11-06 | 2017-01-11 | 徐浩清 | Current-limiting small-sized breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20150325 |
|
| RGAV | Abandon patent right to avoid regrant |