CN101989511A - Load switch - Google Patents
Load switch Download PDFInfo
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- CN101989511A CN101989511A CN200910115932XA CN200910115932A CN101989511A CN 101989511 A CN101989511 A CN 101989511A CN 200910115932X A CN200910115932X A CN 200910115932XA CN 200910115932 A CN200910115932 A CN 200910115932A CN 101989511 A CN101989511 A CN 101989511A
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- load switch
- vacuum
- contact
- conducting rod
- fixed contact
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- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention discloses a load switch comprising a vacuum arc extinguish chamber. The vacuum arc extinguish chamber comprises an insulating housing with a vacuum inner part, a movable contact and a fixed contact are sealed in the housing, the outer sides of the movable contact and the fixed contact are respectively connected with a movable conducting rod and a fixed conducting rod, a telescopic corrugated pipe is connected to the movable conducting rod, and shielding cases are covered on the movable contact and the fixed contact. The movable conducting rod can be driven to move up and down by using the extension of the corrugated pipe so as to accomplish the separation and combination operation of the contacts, medium and high voltage circuits can rapidly extinguish arc and inhibit current by utilizing the good insulation of the vacuum inner part of the vacuum arc extinguish chamber after being powered off, and the shielding cases are used for preventing the contacts from generating a great amount of metal steam and liquid drop splashing in an arcing process. The on-off transfer current of the load switch with the vacuum arc extinguish chamber can reach 3150A, and the load switch has the characteristics of energy saving, fire prevention, explosion prevention, long service life, reliable running and no pollution.
Description
Technical field
The present invention relates to a kind of on-load switch.
Background technology
On-load switch is a kind of electric switch, is used to transmit and disconnect the rated current of electrical network.It will keep the airborne distance of cut-offfing according to standard code in off-state, different with isolating switch, isolating switch need not have the function of turn-off current when voltage is arranged, on-load switch must have the ability of the extinguish arcs that possesses carrying, and the power of electric arc is determined by the rated current that rated voltage maybe will disconnect.On-load switch has several, and as pressure-operated load switch, air-generating on-load switch, the amount of calming the anger that so-called pressure-operated load switch, this switch are used in the interrupting process generation is sprayed onto on the electric arc to reach the pressure arc; So-called air-generating on-load switch with electric arc guide to both sides have generation gas material-generally use plastics-small gap in, by the increase of pressure and the variation of isolation distance, electric current one zero passage just knocks out like this.Existing on-load switch, the gas flow that produces and spray is bigger, this gas may influence alternate isolation distance, strengthened the structural design work that limits this phenomenon, the directivity during in addition owing to the gas ejection many times disconnects after the action, contaminated and the reduction electrical strength of the parts possibility of switch, and, existing pressure-operated load switch, the transfer current maximum of cut-offfing can only reach 1600A.
Summary of the invention
The purpose of this invention is to provide a kind of on-load switch that adopts vacuum extinction.
For achieving the above object, the technical solution used in the present invention is: a kind of on-load switch, described on-load switch comprises vacuum interrupter, described vacuum interrupter comprises the insulation crust of inner vacuum, be sealed with moving contact and fixed contact in the described shell, the outside of described moving contact and described fixed contact is connected with moving conductive rod and static conductive rod separately, is connected with telescopic bellows on the described moving conductive rod, is covered with radome on described moving contact and the described fixed contact.
Described shell is a ceramic package.
Because the present invention has adopted above technical scheme, its advantage is as follows: moving conductive rod can make moving conductive rod move up and down by means of the flexible of bellows, to finish the branch closing operation of contact, vacuum interrupter makes behind the mesohigh circuitry cuts power supply blow-out rapidly and suppresses electric current by the good insulating properties of vacuum in managing, radome, be used for preventing that contact from producing a large amount of metallic vapour and droplets in the arcing process, the on-load switch of band vacuum interrupter, its transfer current that cut-offs can reach 3150A, has energy-conservation, fire prevention, explosion-proof, life-span is long, reliable and free of contamination characteristics.
Description of drawings
Accompanying drawing 1 is a schematic diagram of the present invention.
Embodiment
Further set forth the present invention below in conjunction with accompanying drawing.
A kind of on-load switch, this on-load switch 1 comprises vacuum interrupter 2, vacuum interrupter, it is the core component of mesohigh power switch, it mainly acts on, make behind the mesohigh circuitry cuts power supply blow-out rapidly and suppress electric current by the good insulating properties of vacuum in managing, avoid accident and unexpected the generation, be mainly used in the power transmission and distribution control system of electric power, vacuum interrupter 2 comprises the insulation crust of inner vacuum, and shell is selected ceramic package for use, be sealed with moving contact and fixed contact in the shell, the outside of moving contact and fixed contact is connected with moving conductive rod and static conductive rod separately, is connected with telescopic bellows on the moving conductive rod, is covered with radome on moving contact and the fixed contact.Moving conductive rod can make moving conductive rod move up and down by means of the flexible of bellows, to finish the branch closing operation of contact.Radome, be used for preventing that contact from producing a large amount of metallic vapour and droplets in the arcing process, pollute the inwall of insulation crust, thereby avoid causing the dielectric strength of vacuum extinction chamber enclosure to descend or the generation flashover, improve the Electric Field Distribution of vacuum extinction chamber interior simultaneously, help the miniaturization of vacuum interrupter insulation crust, especially for high-tension vacuum interrupter miniaturization remarkable result is arranged, use radome can absorb a part of arc energy, condensation electric arc product, particularly vacuum interrupter is when cut-offfing short circuit current, the most of conductively-closed cover of the heat energy that electric arc produced absorbs, and helps improving the medium recovery strength between contact, and the amount that radome absorbs the electric arc product is big more, the energy that its absorption is described is also big more, and this plays good action to the capacity that cut-offs that increases vacuum interrupter.
Vacuum interrupter is to utilize high vacuum operational insulation arc-extinguishing medium on the on-load switch, realizes a kind of electron tube of the on-off function of power circuit by sealing a pair of contact in a vacuum.When it disconnects the electric current of certain numerical value, the moment that dynamic/static contact is separating, electric current is retracted on any of contact separation just, violent increase of resistance between electrode and temperature occurring improves rapidly, until the generating electrodes evaporation of metals, form high electric field strength simultaneously, cause extremely strong strong emission and gap breakdown, produce vacuum arc, when power current near zero the time, also be the increase of clearance between open contacts simultaneously, the plasma of vacuum arc is very fast to diffusion all around, after the arc current zero passage, the medium in contact gap becomes insulator by electric conductor rapidly, so electric current is by disjunction.Suitable longitudinal magnetic field can be produced in the contact gap during the arcing, this magnetic field can make electric arc be evenly distributed on contact surface, keep low arc voltage, thereby make vacuum interrupter have dielectric strength resume speed, little arc energy and little corrosion rate behind the higher arc.The ability and the useful life of vacuum interrupter drop-out current like this, have just been improved.Among the present invention, the on-load switch of band vacuum interrupter, its transfer current that cut-offs can reach 3150A, have energy-conservation, fire prevention, explosion-proof, the life-span long, reliable and free of contamination characteristics.
Claims (2)
1. on-load switch, it is characterized in that: described on-load switch comprises vacuum interrupter, described vacuum interrupter comprises the insulation crust of inner vacuum, be sealed with moving contact and fixed contact in the described shell, the outside of described moving contact and described fixed contact is connected with moving conductive rod and static conductive rod separately, be connected with telescopic bellows on the described moving conductive rod, be covered with radome on described moving contact and the described fixed contact.
2. a kind of on-load switch according to claim 1 is characterized in that: described shell is a ceramic package.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910115932XA CN101989511A (en) | 2009-08-03 | 2009-08-03 | Load switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910115932XA CN101989511A (en) | 2009-08-03 | 2009-08-03 | Load switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101989511A true CN101989511A (en) | 2011-03-23 |
Family
ID=43745994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910115932XA Pending CN101989511A (en) | 2009-08-03 | 2009-08-03 | Load switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101989511A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675944A (en) * | 2016-04-07 | 2016-06-15 | 威胜集团有限公司 | Three-phase combined load switch module |
| CN109755065A (en) * | 2017-11-03 | 2019-05-14 | 江苏明及电气股份有限公司 | A kind of arc-extinguishing mechanism for on-load switch |
| CN110187226A (en) * | 2019-06-28 | 2019-08-30 | 无锡宏广电容器有限公司 | Polypropylene film capacitor short circuit dischange device |
| CN112614733A (en) * | 2020-11-24 | 2021-04-06 | 天津平高智能电气有限公司 | Main shielding case of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber |
| CN113257615A (en) * | 2021-05-12 | 2021-08-13 | 湖北大禹汉光真空电器有限公司 | Vacuum arc-extinguishing chamber with external controllable magnetic field |
-
2009
- 2009-08-03 CN CN200910115932XA patent/CN101989511A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675944A (en) * | 2016-04-07 | 2016-06-15 | 威胜集团有限公司 | Three-phase combined load switch module |
| CN109755065A (en) * | 2017-11-03 | 2019-05-14 | 江苏明及电气股份有限公司 | A kind of arc-extinguishing mechanism for on-load switch |
| CN109755065B (en) * | 2017-11-03 | 2023-10-24 | 江苏明及电气股份有限公司 | Arc extinguishing mechanism for load switch |
| CN110187226A (en) * | 2019-06-28 | 2019-08-30 | 无锡宏广电容器有限公司 | Polypropylene film capacitor short circuit dischange device |
| CN112614733A (en) * | 2020-11-24 | 2021-04-06 | 天津平高智能电气有限公司 | Main shielding case of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber |
| CN112614733B (en) * | 2020-11-24 | 2024-01-23 | 天津平高智能电气有限公司 | Main shielding cover of vacuum arc-extinguishing chamber and vacuum arc-extinguishing chamber |
| CN113257615A (en) * | 2021-05-12 | 2021-08-13 | 湖北大禹汉光真空电器有限公司 | Vacuum arc-extinguishing chamber with external controllable magnetic field |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110323 |