EP2618355A1 - Vapor shield arrangement for vacuum switsching tube - Google Patents
Vapor shield arrangement for vacuum switsching tube Download PDFInfo
- Publication number
- EP2618355A1 EP2618355A1 EP12000299.3A EP12000299A EP2618355A1 EP 2618355 A1 EP2618355 A1 EP 2618355A1 EP 12000299 A EP12000299 A EP 12000299A EP 2618355 A1 EP2618355 A1 EP 2618355A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shielding
- shield arrangement
- vapor shield
- arrangement according
- shielding element
- 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.)
- Granted
Links
- 239000011796 hollow space material Substances 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 2
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- BEYTVZZIUAWCMD-UHFFFAOYSA-N [W].[Cu].[Cr] Chemical compound [W].[Cu].[Cr] BEYTVZZIUAWCMD-UHFFFAOYSA-N 0.000 claims description 2
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims description 2
- 230000003628 erosive effect Effects 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 12
- 238000002835 absorbance Methods 0.000 abstract description 2
- 238000001465 metallisation Methods 0.000 abstract description 2
- 238000000151 deposition Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 239000002923 metal particle Substances 0.000 description 4
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001883 metal evaporation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
- H01H2033/66269—Details relating to the materials used for screens in vacuum switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
- H01H2033/66276—Details relating to the mounting of screens in vacuum switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
- H01H2033/66292—Details relating to the use of multiple screens in vacuum switches
Definitions
- the invention relates to a vapor shield arrangement for vacuum switching tube, as for the use in medium voltage switchgears.
- Vacuum switching tubes are often applied with radial- or axial- magnetic field contact system with coaxial shielding.
- a profiled shielding supports power increase of such vacuum switching tubes.
- a light arc occurs between the contact pieces.
- cylindrical shieldings are positioned around the contacts. Such arrangements are known from the DE 195 03 347 A1 .
- the shielding consist of at least two concentric arranged cylindric shielding elements with a space or hollow space between the so arranged inner shielding element and the at least one outer shielding element, and that the inner shielding element has openings, which corresponds with the hollow space between the shielding elements, and the surrounding outer shielding element is made of a porous material.
- the effect of metal particle deposition on the inner ceramic vacuum chamber surface will be prevented not only by the use of a single shielding, but by the use of hollow space absorption of the light arc energy as well as the absorption of the metal particle evaporation.
- the outer shielding made of porous material dissipates the energy which passes through the openings of the inner shielding into the hollow space in case of an occurring light arc in a perfect way.
- a further advantageous embodiment is, that the openings are arranged regular over the complete inner shielding element. With this an optimal energy distribution is given.
- the openings are made by punching, machining, lasering or simply sintering of particles out. This is easy in manufacture and physically very effective, because of the shape of such punched out openings, with the resulting bending of the border line.
- a futher advantageous possibility is, that the openings are made by materials drilling.
- At least one of the shielding elements can consist of topographic structured regular surface structure. This supports the aforesaid energy distribution furthermore
- At least the inner shielding element consist of, or is surface coated on its inner surface with heat erosion restistant material such as copper-cromium or copper-tungsten or copper-chromium-tungsten or stainless steel.
- the outer, or the next to the inner shielding element arranged further shielding element is made of copper, or a copper a copper steel or iron alloy.
- FIG. 1 and 2 An embodiment of the invention is shown in figure 1 and 2 .
- FIG. 1 shows partly a vacuum chamber in medium voltage use for so called vacuum circuit breakers 1.
- a vacuum chamber consist basically of a middle part made as a ceramic tube or connected ceramic tube segments. The ends are closed vacuum tight with metal caps.
- Inside are two contact pieces which can be moved relatively in order to close and open the contact pieces 2 and 3. In most cases one contact piece is fixed and one is movable, over a vacuumtight bellows. In case of opening the contact, a light arc occurs, which has to be eliminated quickly.
- a schielding which is a cylindric tube 4 surrounds the contact area in order to prevent metal particle deposition on the inner surface of the ceramic parts 5 and 6.
- the shielding is not a single layer tube, but an arrangement of at least two concentric shielding tubes 4 and 4' in that way, that the shielding is a tube-in-tube arrangement.
- the inner shielding element or tube has regular arrangement of punched out openings with a spreaded irregular borderline of around this openings itself. This causes an optimal energy dissipation in case of occuring light arc. Important is, that only the inner shielding element has such openings.
- the surrounding second shielding element has no openings in case there is a "only" a double shield arrangement. So both concentric shielding elements or tube include a inner hollow space, in which perfect energy dissipation takes place.
- both shielding elements are structured regularely.
- the surface structure is made by a kind of a folded tube like a bellows.
- each surface, inner and outer surfaces are structured in that way. This prolongs the energy dissipation path furthermore and supports the intended effect additionally.
- the axial fixation that means the prevention of an axial displacement of the external shielding element 4' is realized by a rotation symmetric cavity in the inner surface of the ceramics, which is dimensioned equal of only slightly longer (in axial direction) then the outer axial extension of the outer shielding element or tube 4'. This gives a sure position of the outer shielding element 4' and prevents an unintended axial shifting.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
In order to result a shielding which has a high absorbance of thermal energy as well as a good protection against metal deposition on the inner ceramic surface caused by high energy light arc impact, it is proposed, that the shielding consist of at least two concentric arranged cylindric shielding elements with a space or hollow space between the so arranged inner shielding (4) element and the at least one outer shielding (4') element, and that the inner shielding (4) element has openings (8) which corresponds with the hollow space between the shielding elements.
Description
- The invention relates to a vapor shield arrangement for vacuum switching tube, as for the use in medium voltage switchgears.
- Vacuum switching tubes are often applied with radial- or axial- magnetic field contact system with coaxial shielding. In use of that, a profiled shielding supports power increase of such vacuum switching tubes. During the contact opening process under loadcondition a light arc occurs between the contact pieces. In order to prevent a deposition of metal vapor on the inner surface of the ceramic part and to prevent the reduction of the dielectrical withstand of a vacuum switching tube, cylindrical shieldings are positioned around the contacts.
Such arrangements are known from theDE 195 03 347 A1 . - It is the object of the invention to result a shielding which has a high absorbance of thermal energy as well as a good protection against metal deposition on the inner ceramic surface caused by high energy light arc impact.
- So the basical idea of the invention is, that the shielding consist of at least two concentric arranged cylindric shielding elements with a space or hollow space between the so arranged inner shielding element and the at least one outer shielding element, and that the inner shielding element has openings, which corresponds with the hollow space between the shielding elements, and the surrounding outer shielding element is made of a porous material.
With this invention the effect of metal particle deposition on the inner ceramic vacuum chamber surface will be prevented not only by the use of a single shielding, but by the use of hollow space absorption of the light arc energy as well as the absorption of the metal particle evaporation. Furthermore the outer shielding made of porous material dissipates the energy which passes through the openings of the inner shielding into the hollow space in case of an occurring light arc in a perfect way. - In single layer shielding in the state of the art, a metal evaporation from the contact piece surfaces directly and a following deposition on the inner vacuum chamber is prevented, but the light arc can produce such a high energy, that the well known single layer shielding can evaporate itself metal particles towards the inner ceramic surface.
- This effect can be exluded with the invention.
- A further advantageous embodiment is, that the openings are arranged regular over the complete inner shielding element. With this an optimal energy distribution is given.
- A further embodiment propose, that the concentric shielding arrangement consist of more than two concentric arranged shielding elements.
This furthermore increases the shielding performance. - In an advantageous way the openings are made by punching, machining, lasering or simply sintering of particles out. This is easy in manufacture and physically very effective, because of the shape of such punched out openings, with the resulting bending of the border line.
- A futher advantageous possibility is, that the openings are made by materials drilling.
- Furthermore, at least one of the shielding elements can consist of topographic structured regular surface structure. This supports the aforesaid energy distribution furthermore
- According to advantageous material use for this invention is disclosed, that at least the inner shielding element consist of, or is surface coated on its inner surface with heat erosion restistant material such as copper-cromium or copper-tungsten or copper-chromium-tungsten or stainless steel.
- Furthermore is proposed, that the outer, or the next to the inner shielding element arranged further shielding element is made of copper, or a copper a copper steel or iron alloy.
- An embodiment of the invention is shown in
figure 1 and2 . -
Figure 1 shows partly a vacuum chamber in medium voltage use for so calledvacuum circuit breakers 1. Such a vacuum chamber consist basically of a middle part made as a ceramic tube or connected ceramic tube segments. The ends are closed vacuum tight with metal caps. Inside are two contact pieces which can be moved relatively in order to close and open thecontact pieces 2 and 3. In most cases one contact piece is fixed and one is movable, over a vacuumtight bellows. In case of opening the contact, a light arc occurs, which has to be eliminated quickly. A schielding, which is a cylindric tube 4 surrounds the contact area in order to prevent metal particle deposition on the inner surface of theceramic parts
In this invention the shielding is not a single layer tube, but an arrangement of at least two concentric shielding tubes 4 and 4' in that way, that the shielding is a tube-in-tube arrangement. -
Figur 2 - The inner shielding element or tube has regular arrangement of punched out openings with a spreaded irregular borderline of around this openings itself. This causes an optimal energy dissipation in case of occuring light arc.
Important is, that only the inner shielding element has such openings. The surrounding second shielding element has no openings in case there is a "only" a double shield arrangement. So both concentric shielding elements or tube include a inner hollow space, in which perfect energy dissipation takes place. - This is supported importantly by the feature of using an outer shielding made of porous material, in order to cause perfect energy dissipation of the occurring light arc.
- Furthermore the surface of both shielding elements are structured regularely. In that shown embodiment, the surface structure is made by a kind of a folded tube like a bellows. In that case, each surface, inner and outer surfaces are structured in that way. This prolongs the energy dissipation path furthermore and supports the intended effect additionally.
- The axial fixation, that means the prevention of an axial displacement of the external shielding element 4' is realized by a rotation symmetric cavity in the inner surface of the ceramics, which is dimensioned equal of only slightly longer (in axial direction) then the outer axial extension of the outer shielding element or tube 4'.
This gives a sure position of the outer shielding element 4' and prevents an unintended axial shifting. -
- 1
- vacuum chamber
- 2
- contact piece
- 3
- contact piece
- 4
- Absorber shielding element
4' Further Absorber shielding element - 5
- ceramic tube, upper part
- 6
- ceramic tube, lower part
- 7
- cavitiy in the inner surface of the ceramic tube
- 8
- openings
- 9
- hollow space between the shielding elements 4 and 4'
Claims (11)
- Vapor shield arrangement for vacuum switching tube, with cylindric shielding elements around the contact piece area,
characterized in that the shielding consist of at least two concentric arranged cylindric shielding elements with a space or hollow space between the so arranged inner shielding element and the at least one outer shielding element, and that the inner shielding element has openings, which corresponds with only the hollow or the space between the shielding elements, and the surrounding outer shielding element is made of a porous material - Vapor shield arrangement according to claim 1,
characterized in that the openings or hollows are arranged regular over the complete inner shielding element. - Vapor shield arrangement according to claim 1 or 2,
characterized in that the concentric shielding arrangement consist of more than two concentric arranged shielding elements. - Vapor shield arrangement according to claim 1,
characterized in that the openings are made by punching out. - Vapor shield arrangement according to one of the aforesaid claims,
characterized in that the openings are made by materials drilling. - Vapor shield arrangement according to one of the aforesaid claims,
characterized in that the openings are made by materials lasering. - Vapor shield arrangement according to one of the aforesaid claims,
characterized in that at least one of the shielding elements consist of topographic structured regular surface structure. - Vapor shield arrangement according to one of the aforesaid claims,
characterized in that at least one of the shielding elements consist of partly arranged hollows at the surface structure of the inner shield. - Vapor shield arrangement according to one of the aforesaid claims,
characterized in that at least the inner shielding element consist of, or is surface coated on its inner surface with heat erosion restistant material such as copper-chromium or copper-tungsten or copper-chromium-tungsten or stainless steel. - Vapor shield arrangement according to one of the aforesaid claims,
characterized in that the outer, or the next to the inner shielding element arranged further shielding element is made of copper, or a copper a copper steel or iron alloy. - Vapor shield arrangement according to one of the aforesaid claims,
characterized in that the outer shielding element is made of a porose sinter-material.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES12000299T ES2927823T3 (en) | 2012-01-19 | 2012-01-19 | Vapor protection arrangement for a switching vacuum tube |
EP12000299.3A EP2618355B1 (en) | 2012-01-19 | 2012-01-19 | Vapor shield arrangement for vacuum switching tube |
PCT/EP2013/000124 WO2013107638A1 (en) | 2012-01-19 | 2013-01-17 | Vapor shield arrangement for vacuum switching tube |
CN201390000205.9U CN204167192U (en) | 2012-01-19 | 2013-01-17 | The vapor barriers device of vacuum switch tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12000299.3A EP2618355B1 (en) | 2012-01-19 | 2012-01-19 | Vapor shield arrangement for vacuum switching tube |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2618355A1 true EP2618355A1 (en) | 2013-07-24 |
EP2618355B1 EP2618355B1 (en) | 2022-07-13 |
Family
ID=47561592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12000299.3A Active EP2618355B1 (en) | 2012-01-19 | 2012-01-19 | Vapor shield arrangement for vacuum switching tube |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2618355B1 (en) |
CN (1) | CN204167192U (en) |
ES (1) | ES2927823T3 (en) |
WO (1) | WO2013107638A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160104590A1 (en) * | 2014-10-13 | 2016-04-14 | Eaton Corporation | Composite arc shields for vacuum interrupters and methods for forming same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107293442B (en) * | 2016-03-30 | 2019-05-24 | 北京京东方真空电器有限责任公司 | A kind of insulation crust having integrated function and its manufacturing method |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1349552A (en) * | 1962-01-26 | 1964-01-17 | Thomson Houston Comp Francaise | Vacuum switch |
JPS48113649U (en) * | 1972-03-31 | 1973-12-26 | ||
JPS55173037U (en) * | 1979-05-31 | 1980-12-11 | ||
US4940862A (en) * | 1989-10-26 | 1990-07-10 | Westinghouse Electric Corp. | Vacuum interrupter with improved vapor shield for gas adsorption |
JPH03261020A (en) * | 1990-03-09 | 1991-11-20 | Fuji Electric Co Ltd | Vacuum valve for vacuum circuit breaker |
DE19503347A1 (en) | 1995-02-02 | 1996-08-08 | Abb Patent Gmbh | Shielding element surrounding the contact point of a vacuum switch |
DE19856288A1 (en) * | 1998-12-07 | 2000-06-08 | Abb Patent Gmbh | Vacuum switching chamber for vacuum circuit breaker, has insulating bodies with vacuum tightly closed by metal lid and containing several screens |
DE102007047473B3 (en) * | 2007-09-27 | 2008-11-20 | Siemens Ag | Procedure for the production of tube shaped component useful as shielding in a vacuum interrupter, comprises filling a section of a tubular cavity of molten form in axial direction with a low melting metal |
-
2012
- 2012-01-19 ES ES12000299T patent/ES2927823T3/en active Active
- 2012-01-19 EP EP12000299.3A patent/EP2618355B1/en active Active
-
2013
- 2013-01-17 WO PCT/EP2013/000124 patent/WO2013107638A1/en active Application Filing
- 2013-01-17 CN CN201390000205.9U patent/CN204167192U/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1349552A (en) * | 1962-01-26 | 1964-01-17 | Thomson Houston Comp Francaise | Vacuum switch |
JPS48113649U (en) * | 1972-03-31 | 1973-12-26 | ||
JPS55173037U (en) * | 1979-05-31 | 1980-12-11 | ||
US4940862A (en) * | 1989-10-26 | 1990-07-10 | Westinghouse Electric Corp. | Vacuum interrupter with improved vapor shield for gas adsorption |
JPH03261020A (en) * | 1990-03-09 | 1991-11-20 | Fuji Electric Co Ltd | Vacuum valve for vacuum circuit breaker |
DE19503347A1 (en) | 1995-02-02 | 1996-08-08 | Abb Patent Gmbh | Shielding element surrounding the contact point of a vacuum switch |
DE19856288A1 (en) * | 1998-12-07 | 2000-06-08 | Abb Patent Gmbh | Vacuum switching chamber for vacuum circuit breaker, has insulating bodies with vacuum tightly closed by metal lid and containing several screens |
DE102007047473B3 (en) * | 2007-09-27 | 2008-11-20 | Siemens Ag | Procedure for the production of tube shaped component useful as shielding in a vacuum interrupter, comprises filling a section of a tubular cavity of molten form in axial direction with a low melting metal |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160104590A1 (en) * | 2014-10-13 | 2016-04-14 | Eaton Corporation | Composite arc shields for vacuum interrupters and methods for forming same |
US9875869B2 (en) * | 2014-10-13 | 2018-01-23 | Eaton Corporation | Composite arc shields for vacuum interrupters and methods for forming same |
US10679806B2 (en) | 2014-10-13 | 2020-06-09 | Eaton Intelligent Power Limited | Composite arc shields for vacuum interrupters and methods for forming same |
Also Published As
Publication number | Publication date |
---|---|
CN204167192U (en) | 2015-02-18 |
EP2618355B1 (en) | 2022-07-13 |
ES2927823T3 (en) | 2022-11-11 |
WO2013107638A1 (en) | 2013-07-25 |
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