EP1716583A1 - Vacuum interrupter chamber with shielding - Google Patents

Vacuum interrupter chamber with shielding

Info

Publication number
EP1716583A1
EP1716583A1 EP05707323A EP05707323A EP1716583A1 EP 1716583 A1 EP1716583 A1 EP 1716583A1 EP 05707323 A EP05707323 A EP 05707323A EP 05707323 A EP05707323 A EP 05707323A EP 1716583 A1 EP1716583 A1 EP 1716583A1
Authority
EP
European Patent Office
Prior art keywords
vacuum interrupter
alloy
copper
shielding
screen
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.)
Withdrawn
Application number
EP05707323A
Other languages
German (de)
French (fr)
Inventor
Dietmar Gentsch
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 Technology AG
Original Assignee
ABB Technology 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 Technology AG filed Critical ABB Technology AG
Publication of EP1716583A1 publication Critical patent/EP1716583A1/en
Withdrawn legal-status Critical Current

Links

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

Definitions

  • the invention relates to a vacuum interrupter with shielding, according to the preamble of patent claim 1.
  • the invention relates to vacuum interrupters for medium-voltage switching devices. It is known to equip vacuum interrupters with a burn-off-resistant screen for a large number of short-circuit current cutouts with a compact design.
  • the vacuum interrupters are used in low, medium and high voltage technology.
  • the said shields for vacuum interrupters are predominantly made of copper and / or stainless steel.
  • the compact design of the vacuum interrupter has a high thermal load on the shielding surrounding the switching system. The load results from the plasma radiation from the metal vapor arc and, in the case of a grinding arc, through direct contact with the shield.
  • the shielding surrounding the contact system is reinforced by the use of a copper-chrome cylinder tube section (composite material - copper-chrome). Shields made of the composite material CuCr with chromium concentrations greater than 15% by weight are known. Furthermore, for reasons of cost, efforts are being made to dispense with an additional screen made of CuCr.
  • Another method is plasma spraying, i.e. a thermal process for applying a copper chrome layer.
  • the plasma spraying is advantageously carried out in an inert gas atmosphere due to the strong gettering effect of the chromium.
  • an increased gas content in the sprayed-on layer is inevitable
  • MLC vacuum interrupter contact piece
  • the invention is therefore based on the object of increasing the number of possible short-circuit current switch-offs.
  • the object is achieved by a vacuum interrupter of the generic type according to the invention by the characterizing features of claim 1.
  • a ready-to-install screen made of a low-alloy copper material, e.g. Copper made with chrome and / or zircon.
  • the chromium concentration is in the range between> 0 and 5% by weight.
  • the screen is preferably made from a commercially available alloy CuCrZr (2.1293) with the composition Cr 0.8, Zr 0.08 and the rest copper.
  • the entire screen consists of a low-alloy and therefore erosion-resistant alloy, which consists of copper with a chromium and / or zicon addition between 0 and 10% by weight.
  • the screen consists of a CuCrZr alloy with the composition Cr 0.8 Zr 0.08 and the rest copper or a CuCrAgFeTiSi alloy.
  • the screen can subsequently be manufactured using a standard shaping process (e.g. deep drawing). This allows an additional operation, e.g. avoid the creation of an erosion-resistant and additional screen part or an additional coating of a component.
  • a standard shaping process e.g. deep drawing
  • the shielding of the vacuum interrupter chamber is made only in part from the alloy.
  • a screen coating is additionally provided in which further elements can be alloyed or contained in the copper, namely tungsten and / or molybdenum and / or platinum and / or zirconium and / or yttrium and / or palladium and / or silver.
  • the figure shows a screen part that surrounds a contact system.
  • the shield component 10 can, as shown, be part of a shield or as

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

The invention relates to a vacuum interrupter chamber with shielding for medium voltage devices, according to patent claim 1. The aim of the invention is to increase the number of possible short-circuit current breaking operations. To this end, the entire shield consists of a low-alloy and thus consumption-resistant alloy consisting of copper with between 0.01 and 10 wt. % of a chromium and/or zirconium addition or copper with between 0.1 and 0.5 wt. % of a chromium and/or silver addition.

Description

Vakuumschaltkammer mit Schirmung Vacuum interrupter with shielding
Die Erfindung betrifft eine Vakuumschaltkammer mit Schirmung, gemäß Oberbegriff des Patentanspruches 1.The invention relates to a vacuum interrupter with shielding, according to the preamble of patent claim 1.
Die Erfindung betrifft Vakuumschaltkammern für Mittelspannungsschaltgeräte. Es ist bekannt Vakuumschaltkammern mit einem abbrandfesten Schirm für eine Vielzahl von Kurzschussstromausschaltungen bei einer kompakten Bauweise auszurüsten. Die Vakuumschaltkammern werden in der Nieder-, Mittel- und Hochspannungstechnik eingesetzt.The invention relates to vacuum interrupters for medium-voltage switching devices. It is known to equip vacuum interrupters with a burn-off-resistant screen for a large number of short-circuit current cutouts with a compact design. The vacuum interrupters are used in low, medium and high voltage technology.
Die besagten Schirmungen für Vakuumschaltkammern werden überwiegend aus den Werkstoffen Kupfer und / oder Edelstahl gefertigt. Für Vakuumschaltkammern, die überwiegend in der Nieder-, Mittel- oder Hochspannungstechnik eingesetzt werden, ist bei einer kompakten Bauform der Vakuumschaltkammer, die das Schaltsystem umgebende Schirmung thermisch hoch belastet. Die Belastung resultiert aus der Plasmastrahlung des Metalldampfbogens und bei einem ausschleifenden Bogen durch einen direkten Kontakt mit der Schirmung.The said shields for vacuum interrupters are predominantly made of copper and / or stainless steel. For vacuum interrupters, which are mainly used in low, medium or high voltage technology, the compact design of the vacuum interrupter has a high thermal load on the shielding surrounding the switching system. The load results from the plasma radiation from the metal vapor arc and, in the case of a grinding arc, through direct contact with the shield.
Im letztgenannten Fall ist ein abbrandfestes Material von Vorteil. In einer Vielzahl von Anwendungen wird die erreichbare Anzahl der Kurzschlussstromausschaltungen durch ein Durchschmelzen einer Edelstahl- bzw. Kupferschirmung begrenzt. In Fällen, in denen eine besonders hohe Anzahl an Kurzschlussstrom Ausschaltungen gefordert ist,In the latter case, an erosion-resistant material is advantageous. In a large number of applications, the achievable number of short-circuit current cutouts is limited by melting through a stainless steel or copper shield. In cases where a particularly high number of short-circuit current trips is required,
BESTATIGUNGSKOPIE wird die das Kontaktsystem umgebende Schirmung durch den Einsatz eines Kupfer- Chrom Zylinderrohrabschnittes (Verbundwerkstoff - KupferChrom) verstärkt. Bekannt sind Abschirmungen aus dem Verbundwerkstoff CuCr mit Chromkonzentrationen größer 15 Gew.-%. Des Weiteren wird aus Kostengründen angestrebt auf einen zusätzlichen Schirm aus CuCr zu verzichten.BESTATIGUNGSKOPIE the shielding surrounding the contact system is reinforced by the use of a copper-chrome cylinder tube section (composite material - copper-chrome). Shields made of the composite material CuCr with chromium concentrations greater than 15% by weight are known. Furthermore, for reasons of cost, efforts are being made to dispense with an additional screen made of CuCr.
Ferner sind hierzu Sinterverfahren zur Herstellung von KupferChrom - Schirmungen über ein Pulversinterverfahren bekannt. Dazu sind für die unterschiedlichen Durchmesser Presswerkzeuge zur Herstellung der Grünlinge erforderlich. Die Herstellung eines dichten Werkstoffes erfolgt anschließend durch Sintern der Grünlinge bei Temperaturen um 1000°C unter einer Wasserstoff-, einer Edelgas- oder unter einer Vakuumatmosphäre.Sintering processes for the production of copper-chromium shields using a powder sintering process are also known for this purpose. For this, pressing tools for the production of the green compacts are required for the different diameters. A dense material is then produced by sintering the green compacts at temperatures around 1000 ° C under a hydrogen, an inert gas or a vacuum atmosphere.
Ein weiteres Verfahren ist das Plasmaspritzen, d.h. ein thermisches Verfahren zum Aufbringen einer KupferChrom - Schicht. Das Plasmaspritzen wird vorteilhafter Weise aufgrund der starken Getterwirkung des Chroms in einer Edelgasatmosphäre durchgeführt. Unvermeidlich ist dennoch ein erhöhter Gasgehalt in der aufgespritzten SchichtAnother method is plasma spraying, i.e. a thermal process for applying a copper chrome layer. The plasma spraying is advantageously carried out in an inert gas atmosphere due to the strong gettering effect of the chromium. However, an increased gas content in the sprayed-on layer is inevitable
Ein weiteres Verfahren ist das sogenannte MLC-Verfahren. Dieses ist ein Verfahren zur Herstellung einer Blechform für Vakuumschaltkammer - Schirme oder Vakuumschaltkammer-Kontaktstücke.Another method is the so-called MLC method. This is a process for producing a sheet metal mold for vacuum interrupters - screens or vacuum interrupter contact pieces.
Dies ist aus der DE197 47 242 C2 bekannt.This is known from DE197 47 242 C2.
Durch den Einsatz einer KupferChrom - Schirmung ist die konstruktive Bandbreite zum Bau einer kompakten Vakuumschaltkammer größer. Damit verbunden sind jedoch höhere Kosten der Vakuumschaltkammer.The use of copper chrome shielding increases the design bandwidth for building a compact vacuum interrupter. However, this entails higher costs for the vacuum interrupter.
Der Erfindung liegt daher die Aufgabe zugrunde, die Anzahl möglicher Kurzschlussstromausschaltungen zu erhöhen. Die gestellte Aufgabe wird durch bei einer Vakuumschaltkammer der gattungsgemäßen Art erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruches 1 gelöst.The invention is therefore based on the object of increasing the number of possible short-circuit current switch-offs. The object is achieved by a vacuum interrupter of the generic type according to the invention by the characterizing features of claim 1.
Weitere vorteilhafte Ausgestaltungen sind in den abhängigen Ansprüchen angegeben.Further advantageous configurations are specified in the dependent claims.
Der oben beschriebene Nachteil kann durch den erfindungsgemäßen Einsatz eines niedriglegierten Kupferwerkstoffes aus dem der abbrandfeste Schirm nach einem bekannten Formverfahren Tiefziehen oder Drücken hergestellt wird vermieden werden.The disadvantage described above can be avoided by the use according to the invention of a low-alloy copper material from which the erosion-resistant screen is produced by a known molding process, deep drawing or pressing.
Zur Steigerung der Abbrandfestigkeit eines Schirmes wird ein einbaufertiger Schirm aus einem niedriglegierten Kupferwerkstoff, z.B. Kupfer mit Chrom und / oder Zirkon gefertigt. Die Chromkonzentration liegt im Bereich zwischen > 0 und 5 Gew. -%. Vorzugsweise wird der Schirm aus einer handfelsüblichen Legierung CuCrZr (2.1293) mit der Zusammensetzung Cr 0.8, Zr 0.08 und Rest Kupfer gefertigt.To increase the fire resistance of a screen, a ready-to-install screen made of a low-alloy copper material, e.g. Copper made with chrome and / or zircon. The chromium concentration is in the range between> 0 and 5% by weight. The screen is preferably made from a commercially available alloy CuCrZr (2.1293) with the composition Cr 0.8, Zr 0.08 and the rest copper.
Der Kern der Erfindung ist daher, dass der gesamte Schirm aus einer niedriglegierten und damit abbrandfesten Legierung besteht, die aus Kupfer mit einem Chrom- und/oder Zikonzusatz zwischen 0 und 10 Gew. -% besteht.The essence of the invention is therefore that the entire screen consists of a low-alloy and therefore erosion-resistant alloy, which consists of copper with a chromium and / or zicon addition between 0 and 10% by weight.
In weiterer vorteilhafter Ausgestaltung ist angegeben, dass der Schirm aus einer CuCrZr - Legierung besteht, mit der Zusammensetzung Cr 0.8 Zr 0.08 und Rest Kupfer oder aus einer CuCrAgFeTiSi - Legierung.In a further advantageous embodiment it is stated that the screen consists of a CuCrZr alloy with the composition Cr 0.8 Zr 0.08 and the rest copper or a CuCrAgFeTiSi alloy.
Über ein Standardformgebungsverfahren (z.B. Tiefziehen) kann nachfolgend der Schirm hergestellt werden. Damit lässt sich ein zusätzlicher Arbeitsgang, z.B. das Erstellen eines abbrandfesten und zusätzlichen Schirmteils oder eine zusätzliche Beschichtung eines Bauteils vermeiden.The screen can subsequently be manufactured using a standard shaping process (e.g. deep drawing). This allows an additional operation, e.g. avoid the creation of an erosion-resistant and additional screen part or an additional coating of a component.
In weiterer vorteilhafter Ausgestaltung ist angegeben, dass die Schirmung der Vakuumschaltkammer nur zu einem Teil aus der Legierung hergestellt ist. In weiterer vorteilhafter Ausgestaltung ist vorgesehen, dass neben einem nach oben ausgeführten Angaben gefertigter Schirm zusätzlich eine Schirmbeschichtung erhält, bei der im Kupfer weitere Elemente legiert bzw. enthalten seien können, nämlich Wolfram und / oder Molybdän und / oder Platin und / oder Zirkon und / oder Yttrium und / oder Palladium und / oder Silber.In a further advantageous embodiment, it is stated that the shielding of the vacuum interrupter chamber is made only in part from the alloy. In a further advantageous embodiment, it is provided that, in addition to a screen manufactured in accordance with the above, a screen coating is additionally provided in which further elements can be alloyed or contained in the copper, namely tungsten and / or molybdenum and / or platinum and / or zirconium and / or yttrium and / or palladium and / or silver.
Die Erfindung ist in der Zeichnung dargestellt und nachfolgend näher beschrieben.The invention is shown in the drawing and described in more detail below.
In der Abbildung ist ein Schirmteil das ein Kontaktsystem umgibt dargestellt. Das Schirmbauteil 10 kann wie dargestellt ein Teil einer Schirmung oder auch alsThe figure shows a screen part that surrounds a contact system. The shield component 10 can, as shown, be part of a shield or as
Komplettschirmung ausgeführt sein. Durch die Wahl einer der o.g. Legierungen besteht zudem die Möglichkeit eine Bördelung (20), die an das Bauteil beim Tiefziehen oder beim Drücken des Werkstoffes an das Schirmbauteil 10, mit anzuformen. Complete shielding. By choosing one of the above Alloys also have the option of forming a flange (20) on the component during deep drawing or when pressing the material on the shield component 10.

Claims

Patentansprüche: claims:
1. Vakuumschaltkammer mit Schirmung für Mittelspannungsanlagen, dadurch gekennzeichnet, dass der gesamte Schirm aus einer niedriglegierten und damit abbrandfesten Legierung besteht, die aus Kupfer mit einem Chrom- und/oder Zirkonzusatz 0,01 und 10 Gew% besteht.1. Vacuum interrupter with shielding for medium-voltage systems, characterized in that the entire shield consists of a low-alloy and therefore erosion-resistant alloy, which consists of copper with a chrome and / or zirconium additive of 0.01 and 10% by weight.
2. Vakuumschaltkammer mit Schirmung für Mittelspannungsanlagen, dadurch gekennzeichnet, dass der gesamte Schirm aus einer niedriglegierten und damit abbrandfesten Legierung besteht, die aus Kupfer mit einem Chrom- und / oder Silberzusatz 0,1 - 0,5 Gew. -% besteht. 2. Vacuum interrupter with shielding for medium-voltage systems, characterized in that the entire shield consists of a low-alloy and therefore erosion-resistant alloy, which consists of copper with a chromium and / or silver additive of 0.1-0.5% by weight.
3. Vakuumschaltkammer nach Anspruch 1 , dadurch gekennzeichnet, dass der Schirm aus einer CuCrZr-Legierung besteht, mit der Zusammensetzung Cr0.8Zr0.08 und Rest Cu. 3. Vacuum interrupter according to claim 1, characterized in that the screen consists of a CuCrZr alloy with the composition Cr0.8Zr0.08 and the rest Cu.
4. Vakuumschaltkammer nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Schirm aus einer CuCrAgFeTiSi - Legierung besteht, mit der Zusammensetzung Cr0.5Ag0.1 und Spuren FeTiSi und Rest Cu. 4. Vacuum interrupter according to claim 2 or 3, characterized in that the screen consists of a CuCrAgFeTiSi alloy with the composition Cr0.5Ag0.1 and traces of FeTiSi and the rest of Cu.
5. Vakuumschaltkammer nach Anspruch 1 , 2 oder 3, dadurch gekennzeichnet, dass der Schirm nur zu einem Teil aus der besagten Zusammensetzung besteht. Vakuumschaltkammer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Schirm zusätzlich mit einer Beschichtung aus Kupfer mit den Legierungsbestandteilen Wolfram und/oder Molybdän und / oder Platin und / oder Zirkon und / oder Yttrium und / oder Palladium und / oder Silber besteht. 5. Vacuum interrupter according to claim 1, 2 or 3, characterized in that the screen consists only in part of said composition. Vacuum interrupter according to one of the preceding claims, characterized in that the screen additionally has a coating of copper with the alloy components tungsten and / or molybdenum and / or platinum and / or zirconium and / or yttrium and / or palladium and / or silver.
EP05707323A 2004-02-11 2005-02-11 Vacuum interrupter chamber with shielding Withdrawn EP1716583A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410006609 DE102004006609B4 (en) 2004-02-11 2004-02-11 Vacuum switch with shielding
PCT/EP2005/001366 WO2005078755A1 (en) 2004-02-11 2005-02-11 Vacuum interrupter chamber with shielding

Publications (1)

Publication Number Publication Date
EP1716583A1 true EP1716583A1 (en) 2006-11-02

Family

ID=34853422

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707323A Withdrawn EP1716583A1 (en) 2004-02-11 2005-02-11 Vacuum interrupter chamber with shielding

Country Status (4)

Country Link
EP (1) EP1716583A1 (en)
CN (1) CN1918683B (en)
DE (1) DE102004006609B4 (en)
WO (1) WO2005078755A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006032522A1 (en) * 2004-09-25 2006-03-30 Abb Technology Ag Method for producing an arc-erosion resistant coating and corresponding shield for vacuum arcing chambers
DE102004061497A1 (en) * 2004-12-15 2006-07-06 Siemens Ag Shield system consisting of a copper-chromium alloy produced by fusion metallurgy
DE102005043484B4 (en) * 2005-09-13 2007-09-20 Abb Technology Ag Vacuum interrupter chamber
EP2469562A1 (en) 2010-12-22 2012-06-27 ABB Technology AG Interrupter insert for a circuit breaker arrangement
US9368301B2 (en) * 2014-01-20 2016-06-14 Eaton Corporation Vacuum interrupter with arc-resistant center shield
CN114367665B (en) * 2021-12-14 2024-03-29 西安理工大学 Connection method of CuW alloy and CuCrZr alloy

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GB1316102A (en) * 1969-08-08 1973-05-09 Ass Elect Ind Vacuum switches
US4553007A (en) * 1983-09-30 1985-11-12 Westinghouse Electric Corp. Arc resistant vapor condensing shield for vacuum-type circuit interrupter
DE3415054A1 (en) * 1984-04-21 1985-10-24 Berkenhoff GmbH, 6301 Heuchelheim WIRE ELECTRODE FOR SPARK EDM SYSTEMS
DE19625737B4 (en) * 1995-07-25 2007-05-03 Abb Patent Gmbh Vacuum interrupter chamber
FR2745118B1 (en) * 1996-02-16 1998-04-03 Schneider Electric Sa VACUUM BREAKER OR CIRCUIT BREAKER
DE19714654A1 (en) * 1997-04-09 1998-10-15 Abb Patent Gmbh Vacuum switch with copper-based contact pieces
DE19747242C2 (en) * 1997-10-25 2002-02-21 Abb Patent Gmbh Process for producing a metal mold for vacuum chamber screens or vacuum chamber contact pieces
JPH11260209A (en) * 1998-03-05 1999-09-24 Shibafu Engineering Kk Component for breaker
DE10137976A1 (en) * 2001-08-08 2002-11-21 Leoni Draht Gmbh & Co Kg Braid, especially for motor vehicle seat heating, has combination of several types of individual wires with different electrical properties for setting desired electrical characteristics

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Also Published As

Publication number Publication date
CN1918683B (en) 2013-12-18
WO2005078755A1 (en) 2005-08-25
DE102004006609B4 (en) 2006-03-16
DE102004006609A1 (en) 2005-09-15
CN1918683A (en) 2007-02-21

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