CN1963976A - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN1963976A CN1963976A CN 200610078597 CN200610078597A CN1963976A CN 1963976 A CN1963976 A CN 1963976A CN 200610078597 CN200610078597 CN 200610078597 CN 200610078597 A CN200610078597 A CN 200610078597A CN 1963976 A CN1963976 A CN 1963976A
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- Prior art keywords
- arc
- mentioned
- electric arc
- circuit
- chamber
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- 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.)
- Granted
Links
- 238000010891 electric arc Methods 0.000 claims abstract description 48
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000009413 insulation Methods 0.000 claims abstract description 10
- 230000008676 import Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 8
- 239000004020 conductor Substances 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
A circuit breaker can drive the electric arc generated between movable contact-point and fixed contact-point to the direction of arc-suppression device quickly, and can obtain high current limiting performance. The circuit breaker is provided with: an insulation shell body composed of pedestal and shell; a fixed contact component which is installed in the inner of the insulation shell body and has a fixed contact-point in one end; a movable contact component, which has movable contact-point that can contact/separate with the fixed contact-point; an electric arc protection component disposed on the both sides of the fixed contact component; an arc-suppression device which suppresses the electric arc generated when the movable contact component separates from the fixed contact component; and an arc channel, for guiding the arc to the arc-suppression device, provided with a connection unit for connecting the arc generation chamber circled by the electric protection component, arc channel, art-suppression device and the track of the movable contact component with the electric arc gas guide chamber circled by the pedestal, shell, and arc channel, guiding the electric arc gas generated in the electric arc generation chamber to the electric arc gas guide chamber.
Description
Technical field
The present invention relates to a kind of circuit-breaker, particularly, relate to the improvement of the opening performance of the employed miniature circuit breaker of home-use distribution board.
Background technology
Circuit-breaker not only has by operating switching that operating grip that this circuit-breaker has carries out circuit, being so-called switching function, also have when overcurrent such as overload current or short circuit current flow through the overcurrent cut-out function that cuts off circuit, bear and prevent the electric wire that causes by this overcurrent and the vital task of burning of load equipment in advance.Increase along with power supply capacity, each company is all trying every possible means how to make this overcurrent cut-out function have bigger breaking capability, but particularly in employed circuit-breaker such as home-use, because its profile is small and exquisite, so for the raising of breaking capability, how to reduce overcurrent, promptly how to improve metering function and become important problem.
As a kind of device that improves this metering function, the known length of the muffler plate that constitutes arc-extinction device that makes has difference, the electric arc that produces between two contacts is at right angles imported muffler plate substantially, and breaking arc improves the device (for example, with reference to patent documentation 1) of breaking capability rapidly.
Here, with reference to Fig. 8 patent documentation 1 is described.Fig. 8 is the major part profile of the circuit-breaker of expression overcurrent break arc action, and in the drawings, by detection of excessive current, guiding valve 6 pretensions and make switching mechanism 5 actions will disconnect between travelling contact 2 and the fixed contact 4.Between travelling contact 2 and fixed contact 4, produce electric arc A1 thereupon.
This electric arc A1 becomes the state of electric arc A2 advancing between the arcing horn (arc hom) 8 of fixed contact therefor 3 continuous extended fixed contact side arc runners 10 and movable contact 1 end.Then, the electric arc point change of current that arrives arcing horn 8 ends is to movable contact side arc runner 9, but this change of current needs the time, under the state of movable contact side electric arc point no show muffler plate 11, stiff end electric arc point moves to the end of arc runner 10 in advance, in this state (electric arc is at A3 ') mobile stagnation of the electric arc point of movable contact side down.Therefore, can not cause that sometimes breaking time, prolongation maybe can't be opened circuit with whole muffler plate 11 breaking arcs.
In the patent documentation 1, in order to accelerate this change of current action, change the structure of the arc runner 9 of movable contact side, perhaps make the length of muffler plate 11a of arc runner 9 sides of the muffler plate 11 that constitutes arc-extinction device 20 shorter than other muffler plate 11b, constitute and make the electric arc that produces between two contacts at right angles import muffler plate (electric arc A3) substantially, thus, breaking arc (electric arc A4, A5) is improved to obtaining high opening performance rapidly.
Patent documentation 1: the spy opens 2004-273235 communique (the 6th page of the 26th row～the 49 row).
Summary of the invention
But in, existing circuit-breaker, especially home-use circuit-breaker, though applied aforementioned improvement, because the size of profile, undeniable meeting is subjected to the restriction of component configuration.As an example that significantly is subjected to this restriction, the arrangement of fixed contact therefor, fixed contact is arranged.That is to say, from the explanation (structure of Fig. 8) of aforementioned patent documentation 1 as can be known, become near the state the bending point X that fixed contact 4 must be configured in fixed contact therefor 3.Usually, circuit-breaker will be transformed to the electromagnetism reaction force by the flux that overcurrent produces, so that movable contact breaks away from from fixed contact therefor rapidly.
As shown in Figure 8, if fixed contact 4 is near bending point X, then will form following shape, promptly flow to sense of current twice rapid displacement at short notice of fixed contact therefor 3, be difficult to fully flow to fixed contact therefor 3 with the electric current of the sense of current that flows through movable contact 1 (among the figure paper direction) up rightabout (among the figure paper direction) down, thereby have the shortcoming that to utilize these electric currents to obtain very big electromagnetism reaction force.Therefore, the disengaging of movable contact 1 produces and postpones, and becomes the state of the start delay of electric arc driving, and this becomes the major reason that obstruction improves metering function.
The present invention puts forward in order to solve above-mentioned problem just, and its purpose is to provide a kind of circuit-breaker, and it needn't change the position that is provided with of fixed contact, and needn't increase particular component, and metering function is improved.
It has: insulation shell, and it is made of pedestal and shell; Fixed contact therefor, it is installed in the inside of this insulation shell, and an end has fixed contact; Movable contact, it has the travelling contact that contacts, breaks away from the said fixing contact; Arc protection spare, it is arranged at the both sides of said fixing contact; Arc-extinction device, it eliminates the electric arc that above-mentioned movable contact produces when the said fixing contact breaks away from; And arc runner; it is directed to above-mentioned arc-extinction device with above-mentioned electric arc; it is characterized in that; be provided with connected unit; it makes track electric arc generation chamber that surrounds and the arcing gas that is surrounded by said base, shell and arc runner by above-mentioned arc protection spare, arc runner, arc-extinction device and movable contact import the chamber to be communicated with, in the arcing gas importing aforementioned arc gas importing chamber that will produce in the aforementioned arc generation chamber.
The effect of invention
The present invention owing to only by the arcing gas importing chamber be connected with the electric arc generation chamber is set, just can improve metering function, thereby needn't increase production cost and just can provide serviceability good circuit-breaker as mentioned above.
Description of drawings
Fig. 1 is the front elevation of the off-state of the circuit-breaker in the embodiments of the present invention 1.
Fig. 2 is the profile along the A-A line among Fig. 1.
Fig. 3 has schematically appended the action of the electric arc when opening circuit action and the front elevation of arc stream in Fig. 1.
Fig. 4 is the amplification oblique drawing of employed arc protection spare part in embodiments of the present invention 1.
Fig. 5 is the front elevation of the off-state of the circuit-breaker in the embodiments of the present invention 2.
Fig. 6 is the oblique view of the pedestal single-piece in the embodiments of the present invention 2.
Fig. 7 represents the circuit-breaker in the embodiments of the present invention 3, (a) is equivalent to the profile along the A-A line among Fig. 1, (b) is near the local amplification oblique drawing its arc runner.
Fig. 8 is the figure that is used to illustrate existing circuit-breaker.
Embodiment
Fig. 1 is that the circuit-breaker in the embodiments of the present invention 1 is the front elevation of off-state, cuts a part and shows its inside.Fig. 2 is the profile along the A-A line among Fig. 1, and for convenience's sake, the part that cuts among Fig. 1 also shows.In addition, Fig. 3 has schematically appended the electric arc action in when action of opening circuit and the front elevation of arc stream in Fig. 1, and Fig. 4 is the amplification oblique drawing of employed arc protection spare part in the embodiments of the present invention 1.
In Fig. 1, circuit-breaker 100 is made of insulation shell, and this insulation shell is made up of pedestal 101 and shell 102, forms with synthetic resin respectively.Accommodate not shown open-close mechanism section in the pedestal 101, outstanding with the handle 103 of this open-close mechanism section interlock from insulation shell, can operate from the outside with hand, more than be well-known.In addition, the 105th, the mains side conductor that is connected with power supply side terminal 104, the 106th, the load-side conductor that is connected with not shown load side terminal.In addition, by the position of this handle 103, indication circuit circuit breaker 100 is in off-state.
Usually, the sort circuit circuit breaker, the fixed contact 4 that is fixed on the travelling contact 2 on the movable contact 1 and is fixed on the fixed contact therefor 3 disposes in opposite directions in the mode that breaks away from each other, fixed contact therefor side arc runner 10 extends continuously from said fixing contact 3, and arcing horn 8 is installed in above-mentioned movable contact 1 end.In addition, be provided with arc-extinction device 20 on the extended end of said fixing contact side arc runner 10 and arcing horn 8, it arranges a plurality of muffler plates 11 with predetermined distance.
Below, the action of the circuit-breaker of present embodiment is described with reference to Fig. 3.If handle 103 is rotated to clockwise direction from shown position, then movable contact 1 is by fixed contact 4 and travelling contact 2, contact with fixed contact therefor 3, circuit-breaker 100 becomes closure state, be that mains side conductor 105 is connected with load-side conductor 106, form not shown power supply and the circuit between load.In addition, Ci Shi current path becomes the order of mains side conductor 105, power supply side terminal 104, fixed contact therefor 3, fixed contact 4, travelling contact 2, movable contact 1, not shown overcurrent detecting element and load side terminal, load-side conductor 106.
If under this state, produce overcurrent, then by with the open-close mechanism section of overcurrent detecting element corresponding actions, movable contact 1 breaks away from fixed contact therefor 3.In addition, about overcurrent detecting element and open-close mechanism section,, thereby omit further detailed description because be not main points of the present invention.
As everyone knows; because the disengaging of movable contact 1; between two contacts, produce electric arc (with reference to the A1 of Fig. 3); this electric arc contacts with the arc protection spare 12 (with reference to Fig. 2) that is made of organic substance etc. on the two sides that are configured in fixed contact 4; because of this arc protection spare 12 is heated the arc column that the gas that produces pushes above-mentioned generation electric arc, and then the air-flow S1 that produces because of electric arc generation chamber and arc-extinction device pressure inside difference helps the change of current to arc runner 10.
Then, electric arc is advanced (with reference to the A2 of Fig. 3) after the change of current is to the arc runner 10 that is fixed on the fixed contact therefor 3, according to operating principle illustrated in fig. 8, is directed in the arc-extinction device 20, utilizes muffler plate 11 breaking arcs and finishes and open circuit.In addition, in this manual, the space that will be surrounded by the track of above-mentioned arc protection spare 12, arc runner 10, muffler plate 11 and movable contact 2 is referred to as electric arc generation chamber 25.The aforementioned arc change of current should be promoted by the air-flow S1 that produces because of above-mentioned electric arc generation chamber and arc-extinction device pressure inside difference, but, obviously can't obtain sufficient electric arc and drive owing to be subjected to the restriction of the arrangement of said fixing contact, fixed contact.Constituted mode in the present embodiment is, on this basis, by breach 13 is set on arc protection spare 12, the arcing gas that aforementioned gas channeling is formed at power supply side terminal 104 bottoms on the drawing of Fig. 3 imports chamber 30 (with reference to the S2 of Fig. 3).Fig. 4 has represented to be arranged at an example of the shape of the breach 13 on the above-mentioned arc protection spare 12.
In addition, above-mentioned arcing gas imports chamber 30, is the space that is surrounded by pedestal 101, shell 102 and arc runner 10.In order to increase the pressure differential with above-mentioned electric arc generation chamber 25, promote flowing of said flow, the space that above-mentioned arcing gas imports chamber 30 is preferably set to the space greater than electric arc generation chamber 25.The above-mentioned space that surrounds by pedestal 101, shell 102 and arc runner 10, because with the space of common structure formation greater than above-mentioned electric arc generation chamber 25, so do not need particular design, the space that neither need to change the configuration of each element and extrude, thereby be not subjected to about performance and cost institute.
As mentioned above, according to the embodiment of the present invention 1, only, arcing gas imports chamber 30 by being set, make this arcing gas import chamber 30 and 25 connections of electric arc generation chamber, can utilize air-flow S2 to promote the change of current of electric arc, even the equipping position of fixed contact 4 has restriction, can not be sent in the circuit-breaker of very big expectation to the electromagnetism reaction force, current limiting performance is improved.In addition, on the basis of improving this current limiting performance, just be driven rapidly owing to begin electric arc, thereby can expect to have the related effect of the consumption that reduces travelling contact 2 and fixed contact 4 from the primary stage that electric arc produces.
Fig. 5 is the part section front elevation of the circuit-breaker in the embodiments of the present invention 2, and is suitable with Fig. 1.Among the figure, the part mark identical label identical or suitable with Fig. 1.In Fig. 5, on the part of pedestal 101, be provided with tap 14, more preferably portion is provided with coldplate 15 within it, and is in addition, identical with Fig. 1.Be imported into the gas of arcing gas importing chamber 30, preferably discharge to the outside by the tap 14 (with reference to Fig. 6) that is arranged on the pedestal 101.The size of above-mentioned tap 14 can be in following scope be implemented arbitrarily, and this scope is, the discharge gas of discharging to the outside from tap 14 can not be present near it metal object ground short circuit because of contact.In addition, the coldplate 15 that is arranged on these tap 14 inside is used for refrigerating gas, for example can use polylith iron plate with holes.
Fig. 7 represents the circuit-breaker in the embodiments of the present invention 3, (a) is the profile along the A-A line among Fig. 1, and is suitable with Fig. 2, (b) is near the local amplification oblique drawing its arc runner, suitable with Fig. 4.Among the figure, the part mark identical label identical or suitable with Fig. 4.In above-mentioned execution mode 1, when being communicated with arcing gas importing chamber 30 and 25 two chambers of electric arc generation chamber, the notch 13 that cuts arc protection spare 12 being set, but in the present embodiment, notch 16 being set on the part of arc runner 10.Thus, even cut the part of arc runner 10, as long as it is just no problem to satisfy the welding characteristic of arc runner 10.
Claims (6)
1. circuit-breaker, it has: insulation shell, it is made of pedestal and shell; Fixed contact therefor, it is installed in the inside of this insulation shell, and an end has fixed contact; Movable contact, it has the travelling contact that contacts, breaks away from the said fixing contact; Arc protection spare, it is arranged at the both sides of said fixing contact; Arc-extinction device, it eliminates the electric arc that above-mentioned movable contact produces when the said fixing contact breaks away from; And arc runner, it is directed to above-mentioned arc-extinction device with above-mentioned electric arc, it is characterized in that,
Be provided with connected unit; it makes track electric arc generation chamber that surrounds and the arcing gas that is surrounded by said base, shell and arc runner by above-mentioned arc protection spare, arc runner, arc-extinction device and movable contact import the chamber to be communicated with, in the arcing gas importing aforementioned arc gas importing chamber that will produce in the aforementioned arc generation chamber.
2. circuit-breaker according to claim 1 is characterized in that,
Above-mentioned arcing gas importing chamber has the space greater than above-mentioned electric arc generation chamber.
3. circuit-breaker according to claim 1 is characterized in that,
Making above-mentioned electric arc generation chamber and arcing gas import the connected unit that the chamber communicates with each other, is the notch that is arranged on the part of above-mentioned arc protection spare.
4. circuit-breaker according to claim 1 is characterized in that,
Making above-mentioned electric arc generation chamber and arcing gas import the chamber and be communicated with each other connected unit, is the notch that is arranged on the part of above-mentioned arc runner.
5. circuit-breaker according to claim 1 is characterized in that,
Indoor in above-mentioned arcing gas importing, be provided with the tap that arcing gas is discharged to the outside of insulation shell.
6. circuit-breaker according to claim 5 is characterized in that,
The porous coldplate is set on above-mentioned tap.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005323620A JP4637722B2 (en) | 2005-11-08 | 2005-11-08 | Circuit breaker |
| JP2005323620 | 2005-11-08 | ||
| JP2005-323620 | 2005-11-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1963976A true CN1963976A (en) | 2007-05-16 |
| CN1963976B CN1963976B (en) | 2010-11-24 |
Family
ID=38082985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100785977A Expired - Fee Related CN1963976B (en) | 2005-11-08 | 2006-05-12 | Circuit breaker |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4637722B2 (en) |
| CN (1) | CN1963976B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201304A (en) * | 2011-05-25 | 2011-09-28 | 常熟开关制造有限公司(原常熟开关厂） | Curve runway structure of breaker |
| CN108695122A (en) * | 2017-04-07 | 2018-10-23 | 三菱电机株式会社 | Circuit-breaker |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3040238B1 (en) * | 2015-08-18 | 2019-01-25 | Schneider Electric Industries Sas | ELECTRIC CIRCUIT BREAKER |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5650027A (en) * | 1979-09-29 | 1981-05-07 | Matsushita Electric Works Ltd | Arc extinguisher |
| JPS58131633A (en) * | 1982-01-30 | 1983-08-05 | 松下電工株式会社 | Circuit breaker |
| JPS59152549U (en) * | 1983-03-29 | 1984-10-12 | 三菱電機株式会社 | circuit break |
| JPH056569U (en) * | 1991-04-11 | 1993-01-29 | 三菱電機株式会社 | Arc-extinguishing device such as shining and disconnection |
| JPH0643992U (en) * | 1992-11-24 | 1994-06-10 | 松下電工株式会社 | Circuit breaker |
| JP2736022B2 (en) * | 1994-12-27 | 1998-04-02 | 日東工業株式会社 | Circuit breaker for wiring |
| JPH09115410A (en) * | 1995-10-17 | 1997-05-02 | Mitsubishi Electric Corp | Circuit breaker |
| FR2750795B1 (en) * | 1996-07-05 | 1998-09-25 | Schneider Electric Sa | SWITCHING DEVICE FOR A HIGH-CALIBER ELECTRIC CIRCUIT BREAKER |
| JP3671766B2 (en) * | 1999-09-27 | 2005-07-13 | 三菱電機株式会社 | Circuit breaker |
| JP4489930B2 (en) * | 2000-11-13 | 2010-06-23 | 三菱電機株式会社 | Circuit breaker |
| JP2003346635A (en) * | 2002-05-28 | 2003-12-05 | Mitsubishi Electric Corp | Circuit breaker |
| JP2004273235A (en) * | 2003-03-07 | 2004-09-30 | Mitsubishi Electric Corp | Circuit breaker |
-
2005
- 2005-11-08 JP JP2005323620A patent/JP4637722B2/en active Active
-
2006
- 2006-05-12 CN CN2006100785977A patent/CN1963976B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201304A (en) * | 2011-05-25 | 2011-09-28 | 常熟开关制造有限公司(原常熟开关厂） | Curve runway structure of breaker |
| CN108695122A (en) * | 2017-04-07 | 2018-10-23 | 三菱电机株式会社 | Circuit-breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1963976B (en) | 2010-11-24 |
| JP2007134072A (en) | 2007-05-31 |
| JP4637722B2 (en) | 2011-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 |