EP1861906B1 - Gas-filled discharge path - Google Patents

Gas-filled discharge path Download PDF

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Publication number
EP1861906B1
EP1861906B1 EP06706016A EP06706016A EP1861906B1 EP 1861906 B1 EP1861906 B1 EP 1861906B1 EP 06706016 A EP06706016 A EP 06706016A EP 06706016 A EP06706016 A EP 06706016A EP 1861906 B1 EP1861906 B1 EP 1861906B1
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EP
European Patent Office
Prior art keywords
discharge path
electrode
gas
electrodes
activation
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Active
Application number
EP06706016A
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German (de)
French (fr)
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EP1861906A1 (en
Inventor
Wolfgang DÄUMER
Frank Werner
Jürgen Boy
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.)
TDK Electronics AG
Original Assignee
Epcos AG
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Publication date
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Publication of EP1861906A1 publication Critical patent/EP1861906A1/en
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Publication of EP1861906B1 publication Critical patent/EP1861906B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/24—Selection of materials for electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed

Abstract

The invention relates to a gas-filled discharge path having at least two electrodes and having an electrode activation mass, which is arranged on at least one of the electrodes. The electrode activation mass contains K2WO4.

Description

Die Erfindung betrifft eine gasgefüllte Entladungsstrecke wie Funkenstrecke oder Überspannungsableiter.The invention relates to a gas-filled discharge path such as spark gap or surge arrester.

Eine gasgefüllte Entladungsstrecke ist aus der Druckschrift DE 19814631 A1 bekannt. Es wird eine glasartige Elektrodenaktivierungsmasse verwendet, die mehrere Komponenten, u. a. als eine Basiskomponente Cäsiumwolframat (Cs2WO4) enthält. In der WO 2004/091060 wird eine Entladungsstrecke gezeigt mit einer Elektrodenaktivierungsmasse, die unter anderem einen geringen Anteil K2WO4 enthält.A gas-filled discharge section is from the document DE 19814631 A1 known. A glassy electrode activating composition is used which contains several components, inter alia as a basic component cesium tungstate (Cs 2 WO 4 ). In the WO 2004/091060 For example, a discharge gap is shown with an electrode activation mass which contains, inter alia, a small proportion of K 2 WO 4 .

Eine weitere gasgefüllte Entladungsstrecke ist aus der Druckschrift DE 19701816 A1 bekannt.Another gas-filled discharge path is from the document DE 19701816 A1 known.

Der Erfindung liegt die Aufgabe zugrunde, eine gasgefüllte Entladungsstrecke mit guten Löscheigenschaften anzugeben.The invention has for its object to provide a gas-filled discharge gap with good extinguishing properties.

Es wird eine gasgefüllte Entladungsstrecke mit wenigstens zwei Elektroden angegeben, bei der zur Sicherstellung der Zündeigenschaften auf wenigstens eine der Elektroden eine K2WO4 enthaltende Elektrodenaktivierungsmasse aufgebracht ist, wobei K2WO4 als eine Basiskomponente der Elektrodenaktivierungsmasse in einer Menge von 20 bis 90 Gewichtsprozent vorgesehen ist.A gas-filled discharge gap with at least two electrodes is specified, in which an electrode activation mass containing K 2 WO 4 is applied to ensure at least one of the ignition properties, wherein K 2 WO 4 as a base component of the electrode activation mass in an amount of 20 to 90 weight percent is provided.

Kalium-Wolframat hat die Eigenschaften eines Getterstoffs. Dieses Material ist chemisch sehr stabil und kann auch nach einer Stoßstrombelastung eine Getterwirkung ausüben. Als zusätzliche Eigenschaft entsteht durch Reduktion des K2WO4 im gasgefüllten Hohlraum freies Kalium und/oder Kaliumoxid, was zu einer niedrigen Austrittsarbeit der Aktivierungsmasse führt.Potassium tungstate has the properties of a getter. This material is chemically very stable and can exert a getter effect even after a surge current load. As an additional property, free potassium and / or potassium oxide is formed by reduction of K 2 WO 4 in the gas-filled cavity, resulting in a low work function of the activating composition.

Kalium-Wolframat schmilzt bei einer Löttemperatur von ca. 820°, wobei insbesondere lose Aktivierungspartikel gebunden werden, so dass der Austritt von losen Aktivierungspartikeln aus der Aktivierungsmasse verhindert werden kann.Potassium tungstate melts at a brazing temperature of about 820 °, in particular loose activation particles are bound, so that the escape of loose activation particles can be prevented from the activation mass.

Die im Rahmen der Erfindung vorgesehene Verwendung von einer Kalium-Wolframat bzw. eine der anderen Kalium-Verbindungen enthaltenden Aktivierungsmasse gewährleistet sehr gute Löscheigenschaften der Entladungsstrecke nach elektrischer Belastung. Ein Ableiter mit einer K2WO4 enthaltenden Aktivierungsmasse verlöscht selbsttätig und zuverlässig nach einem Ableitvorgang trotz anliegender Gleichspannung.The envisaged in the invention use of a potassium tungstate or one of the other potassium compounds containing activation mass ensures very good quenching properties of the discharge path after electrical load. An arrester with a K 2 WO 4 containing activation mass extinguished automatically and reliably after a discharge despite the applied DC voltage.

In einer ersten bevorzugten Variante wird eine als Funkenstrecke ausgebildete Entladungsstrecke mit einem beispielsweise keramischen, vorzugsweise zylindrischen Hohlkörper mit einer Mantelfläche angegeben. Offene Stirnseiten des Hohlkörpers sind durch Endelektroden abgeschlossen. Somit wird ein geschlossener Hohlraum gebildet, der mit einem Edelgas gefüllt ist.In a first preferred variant, a discharge path, designed as a spark gap, with a, for example, ceramic, preferably cylindrical, hollow body with a jacket surface is specified. Open end faces of the hollow body are closed by end electrodes. Thus, a closed cavity is formed, which is filled with a noble gas.

Die Aktivierungsmasse ist auf den zueinander gewandten aktiven Oberflächen der Elektroden angeordnet. Die aktiven Oberflächen können mindestens eine Vertiefung oder mehrere Vertiefungen in Form einer Waffelung zur Aufnahme von der Aktivierungsmasse aufweisen. Unter einer Waffelung werden sich kreuzende Vertiefungen verstanden. Auf der aktiven Oberfläche einer Elektrode können alternativ mehrere Vertiefungen vorgesehen serin, die sich nicht kreuzen.The activation mass is arranged on the mutually facing active surfaces of the electrodes. The active surfaces may have at least one or more indentations in the form of a waffle for receiving the activating mass. Waffling is understood to mean intersecting depressions. On the active surface of an electrode, alternatively, a plurality of recesses may be provided, which do not intersect.

In einer zweiten bevorzugten Variante wird eine als ein Zwei-Strecken-Ableiter ausgebildete Entladungsstrecke mit zwei vorzugsweise stirnseitig angeordneten Endelektroden und einer hohlzylindrischen Mittelelektrode angegeben. Zwischen der Mittelelektrode und einer der Endelektroden ist vorzugsweise jeweils ein hohlzylindrischer Keramikisolator angeordnet.In a second preferred variant, a discharge path designed as a two-way arrester is provided with two end electrodes, preferably arranged on the end side, and a hollow-cylindrical center electrode. Between the center electrode and one of the end electrodes, a hollow-cylindrical ceramic insulator is preferably arranged in each case.

Die Aktivierungsmasse ist zum Aufbringen sowohl auf die Mittelelektrode als auch auf die Endelektroden des Ableiters geeignet. Die Mittelelektrode kann mit einer umlaufenden Rille zur Aufnahme der Aktivierungsmasse versehen sein.The activation mass is for application to both the center electrode and the end electrodes of the arrester suitable. The center electrode may be provided with a circumferential groove for receiving the activation mass.

Die Aktivierungsmasse kann bei Endelektroden in beiden Ausführungsbeispielen auf den zueinander gewandten aktiven Elektrodenflächen in den dafür vorgesehenen Vertiefungen eingearbeitet sein.The activation mass can be incorporated in end electrodes in both embodiments on the mutually facing active electrode surfaces in the recesses provided for this purpose.

Die Aktivierungsmasse kann aus einer Basiskomponente, K2WO4 bestehen.The activation mass may consist of a basic component, K 2 WO 4 .

Die Aktivierungsmasse kann mehrere Komponenten, insbesondere Basiskomponenten enthalten. K2WO4 ist als eine Basiskomponente der Aktivierungsmasse in einer Menge von 20 bis 90 Gew.%, vorzugsweise in einer Menge von 30 bis 60 Gew.% vorgesehen.The activation mass may contain a plurality of components, in particular base components. K 2 WO 4 is provided as a base component of the activating composition in an amount of 20 to 90% by weight, preferably in an amount of 30 to 60% by weight.

Die Aktivierungsmasse kann in einer Variante mindestens eine Basiskomponente und darüber hinaus Additive aufweisen. Eine der Basiskomponenten ist dabei K2WO4.The activation composition may in one variant have at least one base component and, in addition, additives. One of the basic components is K 2 WO 4 .

Als weitere Basiskomponenten kommen in Betracht insbesondere

  1. 1) Metalloxide, z. B. TiO2;
  2. 2) metallische Komponenten, z. B. Al, metallisches Ti;
  3. 3) Halogenide - z. B. KBr, NaBr.
Particularly suitable as further basic components are
  1. 1) metal oxides, eg. For example, TiO 2 ;
  2. 2) metallic components, eg. B. Al, metallic Ti;
  3. 3) halides - z. B. KBr, NaBr.

Die Elektrodenmasse kann außerdem einen Glasanteil bzw. Silikate, z. B. Natriumsilikat, Cäsiumsilikat und Kaliumsilikat enthalten. Des weiteren kommen in Betracht BaTiO3, TiO2, LiNbO3, Na2B4O7, MgO. Na2B4O7, MgO sind insbesondere als Additive geeignet.The electrode material may also contain a proportion of glass or silicates, for. As sodium silicate, cesium silicate and potassium silicate. Further suitable are BaTiO 3 , TiO 2 , LiNbO 3 , Na 2 B 4 O 7 , MgO. Na 2 B 4 O 7 , MgO are particularly suitable as additives.

Die Basiskomponenten können in einer Menge von jeweils etwa 20 bis 90 Gew. % und die Additive in einer Menge von jeweils etwa kleiner als 10 Gew. % enthalten sein.The base components may be contained in an amount of about 20 to 90% by weight, respectively, and the additives may be contained in an amount of about less than 10% by weight, respectively.

Claims (4)

  1. A gas-filled discharge path with at least two electrodes and with an electrode-activation compound disposed on at least one of the electrodes,
    wherein the electrode-activation compound contains K2WO4,
    characterized in that K2WO4 is provided as a basic component of the electrode-activation compound in an amount of 20 to 90% by weight.
  2. The discharge path according to Claim 1,
    which is in the form of a spark gap with two end electrodes arranged at the end face.
  3. The discharge path according to Claim 1,
    which is in the form of a surge arrester with two end electrodes arranged at the end face.
  4. The discharge path according to one of Claims 1 to 3,
    wherein the electrode-activation compound is disposed in a recess in the respective electrode.
EP06706016A 2005-03-23 2006-02-24 Gas-filled discharge path Active EP1861906B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005013499A DE102005013499A1 (en) 2005-03-23 2005-03-23 Gas filled discharge line
PCT/DE2006/000347 WO2006099833A1 (en) 2005-03-23 2006-02-24 Gas-filled discharge path

Publications (2)

Publication Number Publication Date
EP1861906A1 EP1861906A1 (en) 2007-12-05
EP1861906B1 true EP1861906B1 (en) 2011-07-13

Family

ID=36219680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06706016A Active EP1861906B1 (en) 2005-03-23 2006-02-24 Gas-filled discharge path

Country Status (6)

Country Link
US (1) US7795810B2 (en)
EP (1) EP1861906B1 (en)
JP (1) JP4801139B2 (en)
CN (1) CN101147304B (en)
DE (1) DE102005013499A1 (en)
WO (1) WO2006099833A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005016848A1 (en) * 2005-04-12 2006-10-19 Epcos Ag Surge arresters
JP5167967B2 (en) * 2008-06-12 2013-03-21 パナソニック株式会社 Manufacturing method of anti-static parts
SI23691A (en) 2011-03-21 2012-09-28 ISKRA ZAĹ ÄŚITE d.o.o. Gas discharge tube with metal body for high current surges

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3430485A1 (en) 1984-08-18 1986-02-27 Basf Ag, 6700 Ludwigshafen FUEL CELL
DE4318994C2 (en) 1993-05-26 1995-04-20 Siemens Ag Gas-filled surge arrester
CH691245A5 (en) 1996-01-12 2001-05-31 Epcos Ag Gas-filled discharge path.
DE19632417C1 (en) 1996-08-05 1998-05-07 Siemens Ag Hydrogen-containing gas-filled surge diverter
DE19741658A1 (en) 1997-09-16 1999-03-18 Siemens Ag Gas-filled discharge gap e.g. spark gap or surge diverter
DE19814631A1 (en) * 1998-03-26 1999-09-30 Siemens Ag Gas-filled discharge line
JP3718142B2 (en) * 2001-06-22 2005-11-16 岡谷電機産業株式会社 Discharge tube
KR100711943B1 (en) 2003-04-10 2007-05-02 오카야 덴기 산교 가부시키가이샤 Discharge tube
JP4247556B2 (en) * 2003-08-08 2009-04-02 岡谷電機産業株式会社 Discharge type surge absorber

Also Published As

Publication number Publication date
CN101147304A (en) 2008-03-19
WO2006099833A1 (en) 2006-09-28
EP1861906A1 (en) 2007-12-05
JP4801139B2 (en) 2011-10-26
CN101147304B (en) 2011-12-21
US20080048545A1 (en) 2008-02-28
JP2008535150A (en) 2008-08-28
US7795810B2 (en) 2010-09-14
DE102005013499A1 (en) 2006-10-05

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