CN101071701B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN101071701B CN101071701B CN2007101063258A CN200710106325A CN101071701B CN 101071701 B CN101071701 B CN 101071701B CN 2007101063258 A CN2007101063258 A CN 2007101063258A CN 200710106325 A CN200710106325 A CN 200710106325A CN 101071701 B CN101071701 B CN 101071701B
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- CN
- China
- Prior art keywords
- movable contact
- fixed contact
- circuit
- contact
- connecting plate
- 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.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/123—Automatic release mechanisms with or without manual release using a solid-state trip unit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2239/00—Miscellaneous
- H01H2239/038—Anti-vandalism
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention discloses a circuit breaker, which can prevent clapboard from breaking resulted from overpressure inside the circuit breaker, and can separate the breaking part with fixed contact, movable contact and explosion chamber from clapboard for loading side with switching mechanism and overcurrent trip. The breaking part with fixed contact(3), movable contact (5) and supporting rack (9) and explosion chamber (6) are accepted in the out shell (1), and the stripping mechanism with trip rod (17) and switching machanism (4) are accepted in middle cover (2). The the breaking part with fixed contact, movable contact and explosion chamber is separated from clapboard for loading side with switching mechanism and overcurrent trip by joint plate with conductivity such as metal joint plate (14).
Description
Technical field
The present invention relates to a kind of circuit-breaker, be particularly useful for protecting the switching mechanism of load-side and over current trip to avoid the damage of the high-temperature gas that blows from the electric arc generating unit.
Background technology
In low-voltage circuit,, use circuit-breakers such as Inturruptor for sub-line and residual current circuit breaker for disconnecting short circuit current or the load current that flows into load.
In this circuit-breaker, comprise: the contact portion that is provided with fixed contact and movable contact, support the bearing support of movable contact pivotally, eliminate the arc-control device of the electric arc of contact portion generation, drive the switching mechanism that movable contact opens and closes, to the tripping mechanism that the snap close of switching mechanism is triped, detect the over current trip that overcurrent makes the tripping mechanism action.These component parts are accommodated in the molding outer casing that the lid by housing main body and mounted thereto constitutes.
And, in such circuit-breaker, in case with big failure of current such as short circuit current, electric arc can take place between fixed contact and movable contact then, contain the metallic particles that evaporates because of arc heat and the HTHP arcing gas of resin and be full of circuit-breaker inside.For this reason, cause the damage of switching mechanism and over current trip sometimes, cause and insert bad or trip badly, or cause insulating vessel and the carbonization of inner molded part or adhere to coal black, cause resistance to descend, cause withstand voltage bad.
For this reason, following method is disclosed in patent documentation 1 for example: the molding outer casing of circuit-breaker is divided into housing main body, is installed on the middle cover above the housing main body and is covered in top cover above the described middle cover, to be accommodated in the housing main body by contact portion and the arc-control device that fixed contact and movable contact constitute, simultaneously switching mechanism and tripping mechanism are accommodated in middle cover, by covering moving parts such as switching mechanism like this, the pollution that its fused mass of avoiding the metal material that causes because of arc heat or insulating material is produced.
In addition, the applicant in first to file, be the following method that discloses in Japanese patent application 2005-50268 number specification and the accompanying drawing: for be suppressed in the patent documentation 1 disclosed structure because of arcing gas around the phase insulation decline of going into to cause, interpolar dividing plate and median septum are set, described interpolar dividing plate surrounds contact portion and arc-control device to each utmost point, it is isolated mutually, and described median septum is isolated between the contact portion of each utmost point and the over current trip that it is arranged behind.
Patent documentation 1: TOHKEMY 2005-228669 communique
But in Japanese patent application 2005-50268 number specification and the disclosed method of accompanying drawing, interpolar dividing plate and median septum form one with molded and shaped with housing main body or middle cover.Therefore, when cutting off big electric current, in case the arcing gas of HTHP takes place, then its internal pressure rises, and the problem that dividing plate wrecks can take place.And concerning its internal structure, when the insufficient occasion in space of configuration dividing plate, there is the problem that is difficult to guarantee diaphragm strength in the block board thickness attenuation.
Summary of the invention
The present invention puts forward for solving the existing problem of above-mentioned prior art, its purpose is, a kind of circuit-breaker is provided, this circuit-breaker can prevent to destroy because of the dividing plate that the internal pressure rising causes, can will comprise the portion that the opens circuit side and the load-side isolation that comprises switching mechanism and over current trip of fixed contact, movable contact and arc control device again with dividing plate.
In order to achieve the above object, the present invention proposes following technical scheme.
(1) a kind of circuit-breaker is characterized in that, comprising:
Be provided with the fixed contact of fixed contact;
Be provided with the movable contact that to realize the travelling contact of switching with described fixed contact;
Support the bearing support of described movable contact pivotally;
Eliminate the arc control device of the electric arc that produces between described fixed contact and the travelling contact;
Drive the switching mechanism that described movable contact opens and closes;
The tripping mechanism that the snap close of described switching mechanism is triped;
The over current trip that detects overcurrent and tripping mechanism is moved;
The lead that is connected with described movable contact;
Take in the shell of described fixed contact, described movable contact, described bearing support and described arc control device;
Take in described switching mechanism and described tripping mechanism and be installed on lid on the described shell; And
Connecting plate with conductivity, the connecting plate of this conductivity will comprise the portion that the opens circuit side of described fixed contact, movable contact and arc control device and isolate with the load-side that comprises described opening and closing device and over current trip, and connect described lead and described over current trip.
Thus, in order to comprise fixed contact, the portion that the opens circuit side of movable contact and arc control device is isolated with the load-side that comprises opening and closing device and over current trip, the connecting plate with conductivity can be used as dividing plate.Therefore,, also can guarantee the intensity of dividing plate, prevent the destruction that internal pressure rises dividing plate is caused in the insufficient occasion in space of configuration dividing plate.Its result, even the arcing gas at HTHP is full of the portion's side occasion that opens circuit, the arcing gas that also can prevent HTHP is invaded load-side, prevent the switching mechanism and the over current trip damage of load-side, cause that access is bad and tripping operation is bad, or prevent the insulating vessel and the carbonization of inner molded parts of load-side or adhere to coal black, cause withstand voltage bad.
(2) in (1) described circuit-breaker,
Described connecting plate is a metallic interconnect.
(3) in (1) or (2) described circuit-breaker,
Described connecting plate disposes this end that is overlapped in described shell and described lid from the inboard.
Like this,, also can make connecting plate be urged and cover, can prevent that connecting plate from removing or the position deviation of connecting plate at shell even in the pressure rising occasion of the portion's side that opens circuit.Therefore,, can prevent that also arcing gas from invading load-side, can suppress switching mechanism and over current trip damages, reduce and insert bad and trip bad even in the portion's side generation electric arc occasion that opens circuit.
As mentioned above, according to the present invention, use has the connecting plate of conductivity, especially metallic interconnect, as the dividing plate of the portion that the opens circuit side that will comprise fixed contact, movable contact and arc control device with the load-side isolation that comprises opening and closing device and over current trip, thus, even be full of the portion's side occasion that opens circuit at the HTHP arcing gas, also can prevent the destruction that internal pressure rises dividing plate is caused, prevent that the arcing gas of HTHP from invading load-side.
Description of drawings
Fig. 1 is that the summary of the circuit-breaker that relates to of one embodiment of the invention constitutes longitudinal section.
Fig. 2 is the longitudinal section of connecting plate 14 parts that amplifies the circuit-breaker of presentation graphs 1.
The top view that Fig. 3 is connecting plate 14 parts of amplifying the circuit-breaker of presentation graphs 1, looked from the D2 direction.
The longitudinal section that Fig. 4 is connecting plate 14 parts of amplifying the circuit-breaker of presentation graphs 1, looked from the D1 direction.
Fig. 5 is the longitudinal section of the portion that opens circuit part that amplifies the circuit-breaker of presentation graphs 1.
Label declaration
The 1-shell, 2-middle cover, 3-fixed contact, 4-switching mechanism, the 5-movable contact, 6-arc control device, 7-fixed contact, the 8-travelling contact, 9-bearing support, 10-sidewall, 11-grid sheet, 12-protective plate, 13-lead, the 14-connecting plate, 15-over current trip, 16-load side terminal, the 17-trip(ping) bar, 18-top cover, 19-electric arc.
Embodiment
Below, present invention will be described in detail with reference to the accompanying circuit-breaker that embodiment relates to.In following examples, though various qualifications have been done in inscape, kind, combination, shape, relative configuration etc., these only exemplify, and the present invention is not limited thereto.
Fig. 1 is that the summary of the circuit-breaker that relates to of one embodiment of the invention constitutes longitudinal section.
Among Fig. 1, in circuit-breaker, be provided with the bearing support 9 of fixed contact 3, movable contact 5 and insulator.Described fixed contact 3 is fixed on the shell 1, and described movable contact 5 is linearly in fact, and between the described fixed contact 3, can open and close, and described bearing support 9 keeps movable contact 5, and it can be turned round by opening and closing axle.And, be provided with travelling contact 8 at the front end of movable contact 5, simultaneously, be provided with fixed contact 7 at an end of fixed contact 3, be integrally formed into power supply side terminal at the other end of fixed contact 3.The portion that opens circuit by described fixed contact 3, movable contact 5 and bearing support 9 forming circuit circuit breakers.In addition, between being provided for eliminating because of fixed contact 3 and movable contact 5, this portion of opening circuit carries out the arc control device 6 of the electric arc that on-off action takes place.
At this, be provided with sidewall 10 at arc control device 6, the multi-disc grid sheet 11 that on sidewall 10, constitutes by magnetic with the laminated supporting in interval of regulation as the insulant supporting mass.And grid sheet 11 constitutes the U font, the breach that formation can make movable contact 5 pass through.In addition, be provided with the arcing gas outlet in the place ahead of the portion of opening circuit, this arcing gas outlet is by preventing that foreign matter from entering insulator protective plate 12 obturations of usefulness, and protective plate 12 is fixed by the shape of supporting mass.
In addition, be provided with the switching mechanism 4 that carries out on-off action between movable contact 5 and fixed contact 3 in circuit-breaker, switching mechanism 4 can be that fulcrum drives movable contact 5 switchings with the switching axle with bearing support 9 formation one.
Have again, in circuit-breaker, be provided with the tripping mechanism that the snap close of switching mechanism 4 is triped and detect the over current trip 15 that overcurrent makes the tripping mechanism action.At this, the mechanicalness deflection of thermal type or electromagnetic type based on the testing result of the overcurrent that flows through load side terminal 16, can take place in the bimetallic of packing in over current trip 15, conductivity heater, armature and electromagnet.And tripping mechanism can will be passed to switching mechanism 4 in the mechanicalness deflection that over current trip 15 takes place by trip(ping) bar 17, and the snap close of switching mechanism 4 is triped.
Rear end at movable contact 5 connects the lead 13 with flexibility, and the connecting plate 14 of lead 13 by being made of metal L word shape is connected with over current trip 15.As the material that constitutes connecting plate 14 metal material for example, can use for example copper, stainless steel or aluminium alloy etc. with conductivity.
At this, can be with the insulating vessel of shell 1, middle cover 2 and the top cover 18 forming circuit circuit breakers of mold pressing resin system.And the portion that opens circuit and the arc control device 6 that comprise fixed contact 3, movable contact 5 and bearing support 9 are incorporated in the shell 1, and the tripping mechanism and the switching mechanism 4 that comprise trip(ping) bar 17 are incorporated in middle cover 2.Middle cover 2 can be installed on the shell 1, and top cover 18 can be installed on the middle cover 2.For the toggle link with opening and closing device 4 is connected on the bearing support 9, also can on the dividing plate of the bottom of middle cover 2, establish slit.
Comprise fixed contact 3, the portion that the opens circuit side of movable contact 5 and arc control device 6 is isolated by metal connecting plate 14 with the load-side that comprises switching mechanism 4 and over current trip 15.At this, isolate open circuit portion's side and load-side occasion with connecting plate 14, preferably connecting plate 14 is configured to be overlapped in from the inboard end of shell 1 and middle cover 2.
In structure shown in Figure 1, the portion that opens circuit of expression central electrode part, but insulating vessel inside can cut apart with phase partition, takes in each portion that opens circuit mutually in each space of cutting apart.
And under fixed contact 3 and movable contact 5 closure states, electric current can pass through power supply side terminal → fixed contact 3 → movable contact 5 → lead 13 → connecting plate 14 → over current trip 15 → load side terminal 16 path flow.
And, in case big electric current such as short circuit current flows into load side terminal 16, then just action of over current trip 15, by trip(ping) bar 17, carry out the disconnection action of opening and closing device 4, bearing support 9 is that fulcrum rotates to open and close axle, thus, movable contact 5 is broken away from from fixed contact 3.
If travelling contact 8 is thrown off with fixed contact 7, the electric current that then flows into load is cut off, and between fixed contact 3 and movable contact 5 electric arc takes place.And electric arc is in case take place, and comprises the metallic particles that evaporates because of arc heat and the HTHP arcing gas of resin and will be full of the portion inside of opening circuit.
At this, because will comprise the portion that the opens circuit side of fixed contact 3, movable contact 5 and arc control device 6 isolates with the load-side that comprises switching mechanism 4 and over current trip 15 with connecting plate 14, even the arcing gas at HTHP is full of the portion's side occasion that opens circuit, can prevent that also the arcing gas of HTHP from invading load-side.Thus, can prevent from the switching mechanism 4 of load-side and over current trip 15 damages and cause to insert bad or trip badly, or prevent the insulating vessel and the carbonization of inner molded part of load-side or adhere to coal black and cause withstand voltage bad.
In addition, by using metallic connecting plate 14 as dividing plate, even in the insufficient occasion of the configuration space of dividing plate, also can guarantee diaphragm strength, the internal pressure of the portion's side that prevents to open circuit rises and causes dividing plate to destroy.
Fig. 2 is the longitudinal section of connecting plate 14 parts that amplifies the circuit-breaker of presentation graphs 1, the longitudinal section that the top view that Fig. 3 is connecting plate 14 parts of amplifying the circuit-breaker of presentation graphs 1, looked from the D2 direction, Fig. 4 be connecting plate 14 parts of amplifying the circuit-breaker of presentation graphs 1, looked from the D1 direction.
In Fig. 2-Fig. 4, connecting plate 14 is configured to be overlapped in from the inboard end (A of Fig. 2 and B part, the C part of Fig. 3) of shell 1 and middle cover 2.Like this, even, connecting plate 14 is pushed on shell 1 and the middle cover 2, prevent that connecting plate 14 from throwing off or connecting plate 14 positions are offset in the pressure rising occasion of the portion's side that opens circuit.Therefore, even in the portion's side generation electric arc occasion that opens circuit, also can prevent arcing gas intrusion load-side, suppress switching mechanism 4 and over current trip 15 damaged, minimizing inserts bad and trips bad.
Fig. 5 is the longitudinal section of the portion that opens circuit part that amplifies the circuit-breaker of presentation graphs 1.
In Fig. 5, if travelling contact 8 is thrown off with fixed contact 7, then between fixed contact 3 and the movable contact 5 electric arc 19 just takes place.And if electric arc 19 takes place, then electric arc 19 is blocked by grid sheet 11, arc extinguishing.
In addition, if electric arc 19 takes place, the HTHP arcing gas that then contains the metallic particles that evaporates because of arc heat and resin just is full of the inside of the portion of opening circuit, and flows to load-side.If arcing gas flows to load-side, then stopped, and turned to the direction of arc control device 6 by connecting plate 14.
Thus, can increase the flow of the arcing gas of invading arc control device 6 sides, the electric arc 19 that takes place between fixed contact 3 and the movable contact 5 is moved to arc control device rapidly, promote the arc extinguishing of electric arc 19.
Above with reference to description of drawings embodiments of the invention, but the present invention is not limited to the foregoing description.Can do all changes in the technology of the present invention thought range, they all belong to protection scope of the present invention.
For example in the above-described embodiments, exemplify metallic plate as connecting plate, but the present invention is not limited thereto, also can use other materials with conductivity.
Claims (2)
1. a circuit-breaker is characterized in that, comprising:
Be provided with the fixed contact of fixed contact;
Be provided with the movable contact that to realize the travelling contact of switching with described fixed contact; Support the bearing support of described movable contact pivotally;
Eliminate the arc control device of the electric arc that produces between described fixed contact and the travelling contact;
Drive the switching mechanism that described movable contact opens and closes;
The tripping mechanism that the snap close of described switching mechanism is triped;
The over current trip that detects overcurrent and tripping mechanism is moved;
The lead that is connected with described movable contact;
Take in the shell of described fixed contact, described movable contact, described bearing support and described arc control device;
Take in described switching mechanism and described tripping mechanism and be installed on lid on the described shell; And
Metal connecting plate, this metal connecting plate will comprise the portion that the opens circuit side of described fixed contact, movable contact and arc control device and isolate with the load-side that comprises described opening and closing device and over current trip, and connect described lead and described over current trip.
2. circuit-breaker according to claim 1 is characterized in that,
Described connecting plate is configured to be overlapped in from the inboard of described shell the end of described shell and described lid.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-132525 | 2006-05-11 | ||
| JP2006132525 | 2006-05-11 | ||
| JP2006132525A JP4957072B2 (en) | 2006-05-11 | 2006-05-11 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101071701A CN101071701A (en) | 2007-11-14 |
| CN101071701B true CN101071701B (en) | 2010-06-09 |
Family
ID=38839169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101063258A Active CN101071701B (en) | 2006-05-11 | 2007-05-11 | Circuit breaker |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4957072B2 (en) |
| KR (1) | KR100865833B1 (en) |
| CN (1) | CN101071701B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5561038B2 (en) * | 2010-09-03 | 2014-07-30 | 富士電機機器制御株式会社 | Circuit breaker |
| JP5531907B2 (en) * | 2010-10-20 | 2014-06-25 | 三菱電機株式会社 | Circuit breaker |
| JP2012199000A (en) * | 2011-03-18 | 2012-10-18 | Fuji Electric Fa Components & Systems Co Ltd | Multipole circuit breaker |
| KR101255475B1 (en) * | 2011-11-10 | 2013-04-16 | 엘에스산전 주식회사 | Molded case circuit breaker |
| CN103903928B (en) * | 2014-04-16 | 2016-05-11 | 南京大全电气研究院有限公司 | A kind of breaker with heat loss through convection housing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5053736A (en) * | 1988-09-02 | 1991-10-01 | Carlingswitch, Inc. | Molded split case electromagnetic circuit breaker assembly |
| EP1115132A1 (en) * | 2000-01-07 | 2001-07-11 | Schneider Electric Industries SA | Pole for electrical circuit breaker with arc extinguishing chamber provided with dielectric shields |
| CN1405819A (en) * | 2001-07-31 | 2003-03-26 | 勒格朗公司 | Electric-arc distinguishing device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0098308B1 (en) * | 1982-01-14 | 1988-08-03 | Mitsubishi Denki Kabushiki Kaisha | Switch |
| KR930006825Y1 (en) * | 1984-09-28 | 1993-10-07 | 웨스팅하우스 일렉트릭 코오포레이숀 | Circuit breaker |
| JPH07141976A (en) * | 1993-11-15 | 1995-06-02 | Toshiba Corp | Circuit breaker |
| JP2003346635A (en) * | 2002-05-28 | 2003-12-05 | Mitsubishi Electric Corp | Circuit breaker |
| JP4428076B2 (en) * | 2004-02-16 | 2010-03-10 | 富士電機機器制御株式会社 | Circuit breaker |
| JP4506212B2 (en) * | 2004-03-10 | 2010-07-21 | 富士電機機器制御株式会社 | Circuit breaker |
-
2006
- 2006-05-11 JP JP2006132525A patent/JP4957072B2/en active Active
-
2007
- 2007-05-09 KR KR1020070044832A patent/KR100865833B1/en active IP Right Grant
- 2007-05-11 CN CN2007101063258A patent/CN101071701B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5053736A (en) * | 1988-09-02 | 1991-10-01 | Carlingswitch, Inc. | Molded split case electromagnetic circuit breaker assembly |
| EP1115132A1 (en) * | 2000-01-07 | 2001-07-11 | Schneider Electric Industries SA | Pole for electrical circuit breaker with arc extinguishing chamber provided with dielectric shields |
| CN1405819A (en) * | 2001-07-31 | 2003-03-26 | 勒格朗公司 | Electric-arc distinguishing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101071701A (en) | 2007-11-14 |
| JP4957072B2 (en) | 2012-06-20 |
| JP2007305409A (en) | 2007-11-22 |
| KR100865833B1 (en) | 2008-10-28 |
| KR20070109879A (en) | 2007-11-15 |
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Owner name: FUJI ELECTRIC MACHINE SYSTEM CO., LTD. Free format text: FORMER OWNER: FUJI ELECTRIC ASSETS MANAGEMENT CO., LTD. Effective date: 20090626 |
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Effective date of registration: 20090626 Address after: Tokyo, Japan Applicant after: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. Address before: Tokyo, Japan Applicant before: Fuji electric Asset Management Co. |
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Address after: Saitama Prefecture, Japan Patentee after: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. Address before: Tokyo Patentee before: FUJI ELECTRIC FA COMPONENTS & SYSTEMS Co.,Ltd. |
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