EP2618355B1 - Dampfabschirmungsanordnung für Vakuumschaltröhre - Google Patents

Dampfabschirmungsanordnung für Vakuumschaltröhre Download PDF

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Publication number
EP2618355B1
EP2618355B1 EP12000299.3A EP12000299A EP2618355B1 EP 2618355 B1 EP2618355 B1 EP 2618355B1 EP 12000299 A EP12000299 A EP 12000299A EP 2618355 B1 EP2618355 B1 EP 2618355B1
Authority
EP
European Patent Office
Prior art keywords
shielding
shielding element
shield arrangement
vapor shield
arrangement according
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.)
Active
Application number
EP12000299.3A
Other languages
English (en)
French (fr)
Other versions
EP2618355A1 (de
Inventor
Dietmar Dr.-Ing. Gentsch
Günter Dipl.-Ing. Pilsinger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Schweiz AG
Original Assignee
ABB Schweiz AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ABB Schweiz AG filed Critical ABB Schweiz AG
Priority to EP12000299.3A priority Critical patent/EP2618355B1/de
Priority to ES12000299T priority patent/ES2927823T3/es
Priority to CN201390000205.9U priority patent/CN204167192U/zh
Priority to PCT/EP2013/000124 priority patent/WO2013107638A1/en
Publication of EP2618355A1 publication Critical patent/EP2618355A1/de
Application granted granted Critical
Publication of EP2618355B1 publication Critical patent/EP2618355B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 .
  • FR 1 349 552 A discloses a vapor shield arrangement for vacuum switching tube, with cylindric shielding elements around the contact piece area.
  • the shielding consists of at least two concentric arranged cylindric shielding elements with a space of 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. 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.
  • 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 regularly over the complete inner shielding element. With this an optimal energy distribution is given.
  • a further embodiment proposes that the concentric shielding arrangement consists of more than two concentric arranged shielding elements.
  • the openings the inner shielding element are made by punching. 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.
  • At least one of the shielding elements can have a topographic structured regular surface structure. This supports the aforesaid energy distribution further.
  • At least the inner shielding element consists of, or is surface coated on its inner surface with, heat erosion resistant 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 shielding 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 4 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.
  • 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'.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Claims (8)

  1. Dampfabschirmungsanordnung für eine Vakuumschaltröhre mit zylindrischen Abschirmungselementen um einen Kontaktstückbereich herum, wobei die Abschirmungselemente aus mindestens zwei konzentrisch angeordneten zylindrischen Abschirmungselementen (4, 4') mit einem Raum oder einem Hohlraum (9) dazwischen bestehen, wobei die so angeordneten Abschirmungselemente ein inneres Abschirmungselement (4) und mindestens ein äußeres Abschirmungselement (4') umfassen und wobei das innere Abschirmungselement (4) Öffnungen (8) aufweist, die nur dem Hohlraum (9) oder dem Raum zwischen den Abschirmungselementen (4, 4') entsprechen, dadurch gekennzeichnet, dass das umgebende äußere Abschirmungselement (4') aus einem porösen Material angefertigt ist, und dadurch, dass die Öffnungen (8) ausgestanzte Öffnungen (8) sind, die eine ausgebreitete unregelmäßige Grenzlinie um die Öffnungen herum aufweisen.
  2. Dampfabschirmungsanordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Öffnungen (8) regelmäßig über das ganze innere Abschirmungselement (4) angeordnet sind.
  3. Dampfabschirmungsanordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die konzentrische Abschirmungsanordnung aus mehr als zwei konzentrisch angeordneten Abschirmungselementen besteht.
  4. Dampfabschirmungsanordnung nach einem der obenstehend genannten Ansprüche, dadurch gekennzeichnet, dass mindestens eines der Abschirmungselemente eine topographisch strukturierte regelmäßige Oberflächenstruktur aufweist.
  5. Dampfabschirmungsanordnung nach einem der obenstehend genannten Ansprüche, dadurch gekennzeichnet, dass mindestens eines der Abschirmungselemente (4, 4') eine gefaltete Innenflächenstruktur umfasst.
  6. Dampfabschirmungsanordnung nach einem der obenstehend genannten Ansprüche, dadurch gekennzeichnet, dass mindestens das innere Abschirmungselement (4) aus hitzeerosionsbeständigem Material, wie beispielsweise Kupfer-Chrom oder Kupfer-Wolfram oder Kupfer-Chrom-Wolfram oder Edelstahl, besteht oder damit auf seiner Innenfläche oberflächenbeschichtet ist.
  7. Dampfabschirmungsanordnung nach einem der obenstehend genannten Ansprüche, dadurch gekennzeichnet, dass das äußere Abschirmungselement (4') oder ein weiteres besagtes Abschirmungselement, das neben dem inneren Abschirmungselement (4) angeordnet ist, aus Kupfer oder einer Kupfer-Stahl- oder -Eisenlegierung angefertigt ist.
  8. Dampfabschirmungsanordnung nach einem der obenstehend genannten Ansprüche, dadurch gekennzeichnet, dass das äußere Abschirmungselement (4') aus einem porösen Sintermaterial angefertigt ist.
EP12000299.3A 2012-01-19 2012-01-19 Dampfabschirmungsanordnung für Vakuumschaltröhre Active EP2618355B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP12000299.3A EP2618355B1 (de) 2012-01-19 2012-01-19 Dampfabschirmungsanordnung für Vakuumschaltröhre
ES12000299T ES2927823T3 (es) 2012-01-19 2012-01-19 Disposición de protección frente al vapor para un tubo de vacío de conmutación
CN201390000205.9U CN204167192U (zh) 2012-01-19 2013-01-17 真空开关管的蒸气屏蔽装置
PCT/EP2013/000124 WO2013107638A1 (en) 2012-01-19 2013-01-17 Vapor shield arrangement for vacuum switching tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12000299.3A EP2618355B1 (de) 2012-01-19 2012-01-19 Dampfabschirmungsanordnung für Vakuumschaltröhre

Publications (2)

Publication Number Publication Date
EP2618355A1 EP2618355A1 (de) 2013-07-24
EP2618355B1 true EP2618355B1 (de) 2022-07-13

Family

ID=47561592

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12000299.3A Active EP2618355B1 (de) 2012-01-19 2012-01-19 Dampfabschirmungsanordnung für Vakuumschaltröhre

Country Status (4)

Country Link
EP (1) EP2618355B1 (de)
CN (1) CN204167192U (de)
ES (1) ES2927823T3 (de)
WO (1) WO2013107638A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9875869B2 (en) 2014-10-13 2018-01-23 Eaton Corporation Composite arc shields for vacuum interrupters and methods for forming same
CN107293442B (zh) * 2016-03-30 2019-05-24 北京京东方真空电器有限责任公司 一种具备集成化功能的绝缘外壳及其制造方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1349552A (fr) * 1962-01-26 1964-01-17 Thomson Houston Comp Francaise Interrupteur à vide
JPS48113649U (de) * 1972-03-31 1973-12-26
JPS55173037U (de) * 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 (ja) * 1990-03-09 1991-11-20 Fuji Electric Co Ltd 真空遮断器用真空バルブ
DE19503347A1 (de) 1995-02-02 1996-08-08 Abb Patent Gmbh Die Kontaktstelle eines Vakuumschalters umgebendes Abschirmelement
DE19856288A1 (de) * 1998-12-07 2000-06-08 Abb Patent Gmbh Vakuumschaltkammer
DE102007047473B3 (de) * 2007-09-27 2008-11-20 Siemens Ag Verfahren zur Herstellung eines als Abschirmung in einer Vakuumschaltröhre einsetzbaren rohrförmigen Bauteils

Also Published As

Publication number Publication date
CN204167192U (zh) 2015-02-18
EP2618355A1 (de) 2013-07-24
ES2927823T3 (es) 2022-11-11
WO2013107638A1 (en) 2013-07-25

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