CN101145455A - Grid-plate type arc-extinguishing equipment for AC-DC switch - Google Patents
Grid-plate type arc-extinguishing equipment for AC-DC switch Download PDFInfo
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- CN101145455A CN101145455A CNA2007100261887A CN200710026188A CN101145455A CN 101145455 A CN101145455 A CN 101145455A CN A2007100261887 A CNA2007100261887 A CN A2007100261887A CN 200710026188 A CN200710026188 A CN 200710026188A CN 101145455 A CN101145455 A CN 101145455A
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- extinguishing
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- plate type
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to an arc-extinguishing device, more particularly a grid-plate type arc-extinguishing device used for DC/AC switches, which comprise an assembly formed by the parallel connection of a high-energy non-linear piezoresistor and a PTC thermistor, and an arc-extinguishing grid plate connected in series or parallel with the assembly. The arc energy and field intensity among the arc-extinguishing grid plates are uniformly restrained within a certain range, thereby preventing the irregular spray-induced burn-out of the switch contact and arc-extinguishing grid plate. With the use of rare-earth permanent magnetic directional blowing mechanism, the inventing ensures the circuit breaker to break reliably under high and low current conditions and solves the technical problems that the prior grid-plate type arc-extinguishing device produces intensive electric arc due to arc-extinguishing failure and overhigh field intensity when opening or breaking high current circuits, resulting in the burn-out of contactor, arcing horn and arc-extinguishing chamber and the arc short circuit as well.
Description
Technical field
The present invention relates to a kind of arc-control device, particularly a kind of grid-plate type arc-extinguishing equipment for AC-DC switch.
Background technology
The arc extinction principle that traditional grid-plate type arc-extinguishing equipment is used between parallel-plate electrode is made, the approach commonly used that direct-current arc is extinguished is to elongate electric arc and strong cold plasma, but switch is in cut-offfing the process of big electric current, electric arc is very inconsistent in electric power direction between the metal gate sheet and the electric field strength between the grid sheet, cause the unsteadiness of electric arc, cause that the random injection because of electric arc causes catastrophic failures such as arc light intereelectrode short-circuit and arc light shorted to earth.The arc-chute of traditional grid-plate type arc-extinguishing equipment is made up of many copper sheets or iron plate, between these arc extinguishing grid pieces, electric arc is divided into that some length are not more than 2～3mm and the electronic arc of connecting, arc voltage mainly is made up of negative electrode and anode drop, arc voltage correspondingly changes between 28V～32V, for extinguish arcs reliably in DC circuit, must select n sheet arc extinguishing grid pieces, n satisfies relational expression: n〉V
Max/ A, wherein V
MaxBe the supply voltage maximum, A is an electrode drop sum between the adjacent gate sheet.Common this grid-plate type arc-extinguishing equipment can satisfy the requirement of natural arc extinguishing, but under the situation of inductive load high-current on-off, even adopt the mode of pressure arc extinguishings such as magnetic blow-out, still do not reach the requirement of reliable arc extinguishing, light then the related components of scaling loss field circuit breaker, heavy then cause arc light intereelectrode short-circuit or shorted to earth, other equipment of scaling loss or cause accidents such as fire.
Summary of the invention
The technical problem to be solved in the present invention is: solve that existing grid-plate type arc-extinguishing equipment is ineffective because of arc extinguishing often at high-current on-off, field intensity is too high produces strong electric arc, the arc slag between scaling loss contact, arc angle, arc control device and arc extinguishing grid pieces forms metal short circuit bridge and technical problem such as ineffective.The invention provides a kind of grid-plate type arc-extinguishing equipment for AC-DC switch, it can be limited in arc energy between arc control device grid sheet and field intensity in certain scope equably, avoid the disorder-injection of electric arc and cause arc light intereelectrode short-circuit and arc light shorted to earth, adopt permanent magnet oriented arc blow-out principle to improve the reliability of arc extinguishing cutout greatly.
The technical solution adopted for the present invention to solve the technical problems is: a kind of grid-plate type arc-extinguishing equipment for AC-DC switch, it has the arc extinguishing grid pieces in the arc control device and is installed in electronic building brick between arc extinguishing grid pieces, electronic building brick is composed in parallel by high-energy non-linear piezo-resistance and PTC thermistor, electronic building brick and arc extinguishing grid pieces connection in series-parallel connection mutually.Adopt high-energy non-linear piezo-resistance and PTC thermistor component to be attempted by between the adjacent arc extinguishing grid pieces, can effectively limit the energy of electric arc and the field intensity between arc extinguishing grid pieces, electric arc is limited in the as far as possible little arc control device space, thereby reaches the purpose that shortens quenching time and over-voltage.
For further improving the reliability of arc extinguishing, also has arc blow-out mechanism in the described arc control device.
For guaranteeing switch disjunction reliably under all size electric current, described arc blow-out mechanism is made up of two rare earth permanent magnet magnetic poles that are set in parallel in the contact both sides and two magnetic conductive boards being close to it, and the material of described arc extinguishing grid pieces is a brass.The arc extinguishing grid pieces of brass material has been got rid of iron grid sheet and has almost all been entered the magnetic blow-out effect that weakens electric arc because of magnetic flux.
The invention has the beneficial effects as follows: grid-plate type arc-extinguishing equipment for AC-DC switch of the present invention, adopt high-energy non-linear piezo-resistance and PTC thermistor to be attempted by between the arc extinguishing grid pieces, limit switch causes too high arc energy and field intensity between the grid sheet in interrupting process, thereby avoid the disorder-injection of arc light and cause arc light intereelectrode short-circuit and arc light shorted to earth; Adopt the directed arc blow-out principle of rare earth permanent magnet to improve the reliability of arc extinguishing greatly, can guarantee circuit breaker equal requirement that can realize reliable disjunction under all size electric current; The arc extinguishing grid pieces of brass material has been got rid of iron grid sheet and has almost all been entered the magnetic blow-out effect that weakens electric arc because of magnetic flux.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of grid-plate type arc-extinguishing equipment for AC-DC switch of the present invention;
Fig. 2 is the vertical view of Fig. 1.
Among the figure: 1. arc extinguishing grid pieces, 2. electronic building brick, the non-linear piezo-resistance of 2-1., 2-2.PTC thermistor, 3. arc blow-out mechanism, 3-1. rare earth permanent magnet magnetic pole, 3-2. magnetic conductive board.
Concrete implementing method
Grid-plate type arc-extinguishing equipment for AC-DC switch of the present invention as shown in Figure 1, it has the arc extinguishing grid pieces 1 in the arc control device and is installed in the electronic building brick 2 of 1 of arc extinguishing grid pieces, the material of arc extinguishing grid pieces 1 is a brass, electronic building brick 2 is formed in parallel by high-energy non-linear piezo-resistance 2-1 and PTC thermistor 2-2, electronic building brick 2 and arc extinguishing grid pieces 1 connection in series-parallel connection mutually, also have arc blow-out mechanism 3 in the arc control device, arc blow-out mechanism 3 is made up of two rare earth permanent magnet magnetic pole 3-1 that are set in parallel in the contact both sides and two magnetic conductive board 3-2 being close to it.
Claims (3)
1. grid-plate type arc-extinguishing equipment for AC-DC switch, it is characterized in that: it has the arc extinguishing grid pieces (1) in the arc control device and is installed in electronic building brick (2) between arc extinguishing grid pieces (1), electronic building brick (2) is formed in parallel by high-energy non-linear piezo-resistance (2-1) and PTC thermistor (2-2), electronic building brick (2) and arc extinguishing grid pieces (1) connection in series-parallel connection mutually.
2. grid-plate type arc-extinguishing equipment for AC-DC switch according to claim 1 is characterized in that: also have arc blow-out mechanism (3) in the described arc control device.
3. grid-plate type arc-extinguishing equipment for AC-DC switch according to claim 2, it is characterized in that: described arc blow-out mechanism (3) is made up of the two rare earth permanent magnet magnetic poles (3-1) that are set in parallel in the contact both sides and two magnetic conductive boards (3-2) of being close to it, and the material of described arc extinguishing grid pieces (1) is a brass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100261887A CN100511523C (en) | 2007-08-20 | 2007-08-20 | Grid-plate type arc-extinguishing equipment for AC-DC switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100261887A CN100511523C (en) | 2007-08-20 | 2007-08-20 | Grid-plate type arc-extinguishing equipment for AC-DC switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101145455A true CN101145455A (en) | 2008-03-19 |
| CN100511523C CN100511523C (en) | 2009-07-08 |
Family
ID=39207890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100261887A Expired - Fee Related CN100511523C (en) | 2007-08-20 | 2007-08-20 | Grid-plate type arc-extinguishing equipment for AC-DC switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100511523C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326177A (en) * | 2013-06-03 | 2013-09-25 | 四川永贵科技有限公司 | Magnetic quenching type high voltage electric connector |
| CN111357071A (en) * | 2017-10-27 | 2020-06-30 | 沙尔特宝有限公司 | Electrical switching device with improved arc extinguishing mechanism |
-
2007
- 2007-08-20 CN CNB2007100261887A patent/CN100511523C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326177A (en) * | 2013-06-03 | 2013-09-25 | 四川永贵科技有限公司 | Magnetic quenching type high voltage electric connector |
| CN103326177B (en) * | 2013-06-03 | 2016-06-29 | 四川永贵科技有限公司 | A kind of magnetic quenching formula high-voltage electric connector |
| CN111357071A (en) * | 2017-10-27 | 2020-06-30 | 沙尔特宝有限公司 | Electrical switching device with improved arc extinguishing mechanism |
| CN111357071B (en) * | 2017-10-27 | 2022-08-16 | 沙尔特宝有限公司 | Electrical switching device with improved arc extinguishing mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100511523C (en) | 2009-07-08 |
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Granted publication date: 20090708 Termination date: 20160820 |
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| CF01 | Termination of patent right due to non-payment of annual fee |