EP0087820A1 - Surge arrester with a gas-filled housing - Google Patents

Surge arrester with a gas-filled housing Download PDF

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Publication number
EP0087820A1
EP0087820A1 EP83102084A EP83102084A EP0087820A1 EP 0087820 A1 EP0087820 A1 EP 0087820A1 EP 83102084 A EP83102084 A EP 83102084A EP 83102084 A EP83102084 A EP 83102084A EP 0087820 A1 EP0087820 A1 EP 0087820A1
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EP
European Patent Office
Prior art keywords
electrodes
gap
surge arrester
electrode
ignition
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Granted
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EP83102084A
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German (de)
French (fr)
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EP0087820B1 (en
Inventor
Gerhard Ing.-Grad. Lange
Jürgen Ing.-grad. Boy
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Siemens AG
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Siemens AG
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Publication of EP0087820A1 publication Critical patent/EP0087820A1/en
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Publication of EP0087820B1 publication Critical patent/EP0087820B1/en
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    • 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
    • H01T1/20—Means for starting arc or facilitating ignition of spark gap
    • H01T1/22—Means for starting arc or facilitating ignition of spark gap by the shape or the composition of the 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
    • H01T1/00—Details of spark gaps
    • H01T1/20—Means for starting arc or facilitating ignition of spark gap
    • 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
    • H01T4/04—Housings

Definitions

  • the present invention relates to a surge arrester according to the preamble of claim 1.
  • a surge arrester is known from DE-OS 2828650.
  • DE-AS 23 10 960 it is known to provide in a surge arrester between each electrode and the inner wall of the insulating body a gusset-shaped gap, which has a length of at least 1 mm and a width of at most 0.15 mm and, due to this dimensioning, a low-vaporization Back space forms because the pressure wave, which arises during flashovers with high current intensity, compresses the gas volume in the gap and thereby largely prevents the penetration of evaporating material into the rear space of the gap.
  • the object on which the present invention is based is to reduce the outer diameter of a surge arrester to less than 4 mm in order to achieve a higher packing density of surge arresters, and at the same time to increase the service life of the surge arrester and at least to maintain the other characteristic data.
  • the very small minimum volume for the gas discharge space of only 20mm 3 can only be achieved in connection with the special shape and the specified materials for the electrodes and the housing.
  • the low-vaporization rear space in the gaps ensures a sufficient insulation gap between the ignition lines and the electrodes.
  • the ignition lines reach into the low-evaporation rear area, since after evaporation the peaks of the electric field disappear and the auxiliary discharge required for ignition when the voltages rise rapidly is made more difficult via the ignition line.
  • the gap between the wall and the electrode must be as small as possible so that the electrodes can be made with a relatively large diameter. This is necessary so that the electrodes do not melt during the discharge, but rather can store the heat generated and finally release it.
  • This narrow gap width is only possible if a highly active electrode activation compound is used.
  • a highly active electrode activation compound is used.
  • Known compositions are suitable for this, such as, in particular, a mixture of potassium halide and a barium-aluminum alloy.
  • This highly active electrode activation compound is housed in an axially symmetrical recess so that on the one hand the compound cannot be blown away during the discharge and on the other hand the arc migrates during the discharge without its base melting the electrodes at one point.
  • the electrode activation compound mentioned also ensures that, in the case of relatively narrow gaps, the main discharge takes place between the end faces of the electrodes, but not via the ignition lines.
  • the ceramic housing, the design of the electrode flange and the brazing result in one very pressure-resistant and thermally stable construction.
  • the invention is based on the finding that the above-mentioned features interact and thereby make it possible to downsize the arrester.
  • FIG. 1 shows a surge arrester according to the invention in a sectional view on a scale of 10: 1.
  • Two electrodes 1 and 2 each have a cylindrical part 3 and a frustoconical part 4.
  • the frustoconical part 4 is thin-walled and integrally connected to a flange 5.
  • the flange 5 is brazed to one end face of a ceramic tube 11 on each end face 10, 12.
  • the electrodes 1, 2 have axially symmetrical depressions 6 in their mutually facing end faces, which are filled with a highly active electrode activation compound 7.
  • the electrodes face in their conical part each have a connecting pin 8, which does not protrude beyond the conical part.
  • a connecting wire 9 is butt welded to each of these connecting pins 8. If the surge arresters are to be inserted into a holder, the welded connecting wire can be omitted.
  • Ignition lines 13 are arranged in a galvanically insulated manner from both electrodes and extend into the low-vaporization rear spaces of the gaps 14 and 15 between the electrodes 1, 2 and the ceramic tube 11.
  • the gaps 14 and 15 have a width of approximately 0.3 mm.
  • the low-vaporization interiors begin at a distance of approximately 1.5 mm from the face of the respective electrode.
  • the ignition lines 13 extend approximately 2.4 mm into the gaps 14, 15.
  • the total length of the gaps, including the gusset in the area of the frustoconical part of this column, is approximately 3.7 mm.
  • the diameter of the cylindrical parts 3 of the electrodes 1, 2 is 2.2 mm, the distance between the end faces of the electrodes 1, 2 is 0.6 mm.
  • the wall thickness of the ceramic tube of only 0.5mm gives the surge arrester in connection with the high temperature resistant brazing the required strength.
  • the pressure wave which occurs particularly during the 2.5 kA test, is absorbed by the shape of the discharge space and the gaps without causing the surge arrester to tear.
  • the ignition line 13 is advantageously designed as a graphite line.
  • the connecting pin 8 can be omitted if no connecting wire is to be welded on.
  • the dimensioning given here allows relatively uncritical manufacturing tolerances.
  • ceramic tubes of the usual tolerance can be used, they do not need to be ground to diameter.
  • Another advantage of the dimensioning according to the invention is a very small electrical capacity of the arrangement, which is achieved by the small electrode diameter. As a result, such arresters can be used in circuits with a high operating frequency without giving rise to undesired attenuation of the frequencies.

Abstract

Eine Verkleinerung des Außendurchmessers von Überspannungsableitern wird bei gleicher Leistungsfähigkeit erreicht, indem die Spalte (14, 15) zwischen zylindrischen Teilen (3) der Elektroden (1, 2) und dem Keramikrohr durch entsprechende Dimensionierung zum Abfangen der Druckwelle von kurzzeitigen Überschlägen mitherangezogen wird, indem Zündstriche (13) angebracht werden, die bis in einen bedampfungsarmen Hinterraum reichen, und indem das Volumen des Entladungsraumes zusammen mit den Spalten (14, 15) einen Wert von 20 mm³ nicht unterschreitet, wenn das Keramikrohr durch Hartlöten mit Flanschen (5) der Elektroden (1, 2) vakuumdicht verbunden ist. Die Erfindung eignet sich für Hauptverteiler mit großer Packungsdichte von Überspannungsableitern.A reduction in the outer diameter of surge arresters is achieved with the same performance by using the gaps (14, 15) between cylindrical parts (3) of the electrodes (1, 2) and the ceramic tube by appropriate dimensioning to intercept the pressure wave from brief flashovers by Ignition lines (13) are attached, which extend into a low-evaporation rear space, and the volume of the discharge space together with the gaps (14, 15) does not fall below a value of 20 mm³ when the ceramic tube is soldered with flanges (5) of the electrodes (1, 2) is connected vacuum-tight. The invention is suitable for main distributors with a high packing density of surge arresters.

Description

Die vorliegende Erfindung betrifft einen Überspannungsableiter gemäß Oberbegriff des Patentanspruchs 1. Ein derartiger Überspannungsableiter ist aus der DE-OS 2828650 bekannt. Aus der DE-AS 23 10 960 ist es bekannt, in einen Überspannungsableiter zwischen jeder Elektrode und der Innenwand des Isolierkörpers einen zwickelförmigen Spalt vorzusehen, welcher eine Länge von mindestens 1mm und eine Weite-von höchstens 0,15mm aufweist und durch diese Dimensionierung einen bedampfungsarmen Hinterraum bildet, da die Druckwelle,
die bei Überschlägen hoher Stromstärke entsteht, das Gasvolumen im Spalt komprimiert und dadurch das Eindringen von abdampfendem Material in den Hinterraum des Spaltes weitgehend verhindert.The present invention relates to a surge arrester according to the preamble of claim 1. Such a surge arrester is known from DE-OS 2828650. From DE-AS 23 10 960 it is known to provide in a surge arrester between each electrode and the inner wall of the insulating body a gusset-shaped gap, which has a length of at least 1 mm and a width of at most 0.15 mm and, due to this dimensioning, a low-vaporization Back space forms because the pressure wave,
which arises during flashovers with high current intensity, compresses the gas volume in the gap and thereby largely prevents the penetration of evaporating material into the rear space of the gap.

Bekannte Überspannungsableiter-haben selbst für die Leistungsklasse lightduty einen Mindestdurchmesser von etwa 5mm. Dabei werden die in jüngster Zeit verschärften Lebensdauerbedingungen für derartige Überspannungsableiter nicht erreicht.Known surge arresters have a minimum diameter of around 5mm even for the lightduty performance class. The recently tightened service life conditions for such surge arresters have not been reached.

Die Aufgabe, die der vorliegenden Erfindung zugrundeliegt, besteht darin, den Außendurchmesser eines Überspannungsableiters auf weniger als 4mm zu verringern, um eine höhere Packungsdichte von Überspannungsableitern zu erreichen, und gleichzeitig die Lebensdauer des Überspannungsableiter zu erhöhen und die übrigen Kenndaten zumindest beizubehalten.The object on which the present invention is based is to reduce the outer diameter of a surge arrester to less than 4 mm in order to achieve a higher packing density of surge arresters, and at the same time to increase the service life of the surge arrester and at least to maintain the other characteristic data.

Diese Aufgabe wird bei einem Überspannungsableiter gemäß Oberbegriff durch das Zusammenwirken der Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst. Die erfindungsgemäße Dimensionierung verhindert gleichzeitig ein Schmelzen und ein Zerplatzen des Überspannungsabieiters und sichert eine lange Lebensdauer.This object is achieved in a surge arrester according to the preamble by the interaction of the features of the characterizing part of patent claim 1. The Dimensioning according to the invention simultaneously prevents melting and bursting of the surge arrester and ensures a long service life.

Das sehr kleine Mindestvolumen für den Gasentladungsraum von nur 20mm3 ist nur in Verbindung mit der speziellen Formgebung und den angegebenen Werkstoffen für die Elektroden und das Gehäuse erreichbar. Der bedampfungsarme Hinterraum in den Spalten gewährleistet eine ausreichende Isolationsstrecke zwischen den Zündstrichen und den Elektroden. Zu einer sicheren Funktion ist aber auch notwendig, daß die Zündstriche in den bedampfungsarmen Hinterraum reichen, da nach einer Bedampfung die Spitzen des elektrischen Feldes wegfallen und somit die zur Zündung bei schnellansteigenden Spannungen erforderliche Hilfsentladung über den Zündstrich erschwert wird. Andererseits muß der Spalt zwischen Wandung und Elektrode möglichst klein sein, damit die Elektroden mit relativ großem Durchmesser ausgeführt werden können. Dies ist erforderlich, damit die Elektroden bei der Entladung nicht schmelzen, sondern die entstehende Wärme speichern und schließlich abgeben können. Diese geringe Spaltbreite ist wiederum nur möglich, wenn eine hochaktive Elektrodenaktivierungsmasse verwendet wird. Hierfür eignen sich bekannte Massen, wie insbesondere eine Mischung aus Kaliumhalogenid und einer Barium-Aluminium-Legierung. Diese hochaktive Elektrodenaktivierungsmasse wird in einer axialsymmetrischen Vertiefung untergebracht, damit einerseits die Masse bei der Entladung nicht weggeblasen werden kann und damit andererseits der Lichtbogen bei der Entladung wandert, ohne daß sein Fußpunkt die Elektroden an einer Stelle zum Schmelzen bringt. Die genannte Elektrodenaktivierungsmasse gewährleistet aber auch, daß bei relativ schmalen Spalten die Hauptentladung zwischen den Stirnflächen der Elektroden, nicht aber über die Zündstriche erfolgt. Das Gehäuse aus Keramik, die Ausführung des Elektrodenflansches und die Hartlötung ergeben einen sehr druckfesten und thermisch stabilen Aufbau.The very small minimum volume for the gas discharge space of only 20mm 3 can only be achieved in connection with the special shape and the specified materials for the electrodes and the housing. The low-vaporization rear space in the gaps ensures a sufficient insulation gap between the ignition lines and the electrodes. For a safe function it is also necessary that the ignition lines reach into the low-evaporation rear area, since after evaporation the peaks of the electric field disappear and the auxiliary discharge required for ignition when the voltages rise rapidly is made more difficult via the ignition line. On the other hand, the gap between the wall and the electrode must be as small as possible so that the electrodes can be made with a relatively large diameter. This is necessary so that the electrodes do not melt during the discharge, but rather can store the heat generated and finally release it. This narrow gap width is only possible if a highly active electrode activation compound is used. Known compositions are suitable for this, such as, in particular, a mixture of potassium halide and a barium-aluminum alloy. This highly active electrode activation compound is housed in an axially symmetrical recess so that on the one hand the compound cannot be blown away during the discharge and on the other hand the arc migrates during the discharge without its base melting the electrodes at one point. However, the electrode activation compound mentioned also ensures that, in the case of relatively narrow gaps, the main discharge takes place between the end faces of the electrodes, but not via the ignition lines. The ceramic housing, the design of the electrode flange and the brazing result in one very pressure-resistant and thermally stable construction.

Der Erfindung liegt die Erkenntnis zugrunde, daß die oben genannten Merkmale zusammenwirken und dadurch die Vekleinerung des Ableiters möglich machen.The invention is based on the finding that the above-mentioned features interact and thereby make it possible to downsize the arrester.

Bei einer Spaltlänge je Elektrode von zumindest 2,5mm werden die heute üblichen Anforderungen an die Spannungsfestigkeit bereits gewährleistet. Eine Ausführungsform mit einer Spaltbreite von03mm, einer Spaltlänge von 3,7mm, einem Durchmesser der Elektroden von 2,2mm, einem gegenseitigen Abstand der Stirnflächen der Elektroden von 0,6mm, symmetrisch zu den beiden Elektroden angeordneten Zündstrichen, die galvanisch gegenüber beiden Elektroden isoliert angeordnet sind und in die beiden Spalte je etwa 2,4mm weit hineinragen, werden die Anforderungen an einen Überspannungsableiter für 5A/1s und 2,5kA der CCITT-Norm 8/20µs mit Sicherheit erfüllt.With a gap length of at least 2.5 mm per electrode, the current requirements for dielectric strength are already guaranteed. An embodiment with a gap width of 03 mm, a gap length of 3.7 mm, a diameter of the electrodes of 2.2 mm, a mutual spacing of the end faces of the electrodes of 0.6 mm, ignition bars arranged symmetrically to the two electrodes and arranged galvanically insulated from both electrodes and protrude approximately 2.4mm into the two gaps, the requirements for a surge arrester for 5A / 1s and 2.5kA of the CCITT standard 8 / 20µs are met with certainty.

Die Erfindung wird nun anhand einer Figur näher erläutert. Die Figur zeigt einen erfindungsgemäßen Überspannungsableiter in geschnittener Ansicht im Maßstab 10:1.The invention will now be explained in more detail with reference to a figure. The figure shows a surge arrester according to the invention in a sectional view on a scale of 10: 1.

Zwei Elektroden 1 und 2 weisen jeweils einen zylinderförmigen Teil 3 und einen kegelstumpfförmigen Teil 4 auf. Der kegelstumpfförmige Teil 4 ist dünnwandig ausgebildet und mit einem Flansch 5 einstückig verbunden. Der Flansch 5 ist jeweils mit einer Stirnseite eines Keramikrohres 11 an jeweils einer Stirnseite 10, 12 hartverlötet. DieElektroden 1, 2 weisen in ihren einander zugewandten Stirnflächen achssymmetrische Vertiefungen 6 auf, welche mit einer hochaktiven Elektrodenaktivierungsmasse 7 gefüllt sind. In ihrem kegelförmigen Teil weisen die Elektroden je einen Anschlußzapfen 8 auf, welcher den kegelförmigen Teil nicht überragt. An diesen Anschlußzapfen 8 ist jeweils ein Anschlußdraht 9 stumpf angeschweißt. Sofern die Überspannungsableiter in eine Halterung eingesetzt werden sollen, kann der angeschweißte Anschlußdraht entfallen. In diesem Fall kann eine Halterung an den Flanschen 5 anliegen. Der Anschlußzapfen 8 stört dabei nicht, da er nicht über den kegelförmigen Teil der Elektroden hervorragt. Zündstriche 13 sind gegenüber beiden Elektroden galvanisch isoliert angeordnet und reichen in bedampfungsarme Hinterräume der Spalte 14 und 15 zwischen den Elektroden 1, 2 und dem Keramikrohr 11 hinein.Two electrodes 1 and 2 each have a cylindrical part 3 and a frustoconical part 4. The frustoconical part 4 is thin-walled and integrally connected to a flange 5. The flange 5 is brazed to one end face of a ceramic tube 11 on each end face 10, 12. The electrodes 1, 2 have axially symmetrical depressions 6 in their mutually facing end faces, which are filled with a highly active electrode activation compound 7. The electrodes face in their conical part each have a connecting pin 8, which does not protrude beyond the conical part. A connecting wire 9 is butt welded to each of these connecting pins 8. If the surge arresters are to be inserted into a holder, the welded connecting wire can be omitted. In this case, a holder can rest on the flanges 5. The connecting pin 8 does not interfere, since it does not protrude over the conical part of the electrodes. Ignition lines 13 are arranged in a galvanically insulated manner from both electrodes and extend into the low-vaporization rear spaces of the gaps 14 and 15 between the electrodes 1, 2 and the ceramic tube 11.

Die Spalte 14 und 15 haben eine Breite von etwa 0,3mm. Die bedampfungsarmen Einterräume beginnen etwa in einer Entfernung von 1,5mm von der Stirnfläche der jeweiligen Elektrode. Die Zündstriche 13 reichen etwa 2,4mm in die Spalte 14, 15 hinein. Die Gesamtlänge der Spaltet, 15 inclusive des Zwickels im Bereich des kegelstumpfförmigen Teiles dieser Spalte beträgt etwa 3,7mm. Der Durchmesser der zylinderförmigen Teile 3 der Elektroden 1, 2 beträgt 2,2mm, der Abstand zwischen den Stirnflächen der Elektroden 1, 2 beträgt 0,6mm. Bei Verwendung einer hochaktiven Elektrodenaktivierungsmasse 7 erfüllt die hier gezeichnete Ausführungsform die Bedingungen eines überspannungsableiters für 5A/1s und 2,5kA gemäß der internationalen Norm CCITT 8/20. Die Wandstärke des Keramikrohres von nur 0,5mm gibt dem Überspannungsabieiter in Verbindung mit der hochtemperaturbeständigen Hartlötung die erforderliche Festigkeit. Die Druckwelle, die insbesondere bei der Prüfung mit 2,5kA auftritt, wird durch die Formgebung des Entladungsraumes und der Spalte abgefangen, ohne zum Zerreißen des Überspannungsableiters zu führen.The gaps 14 and 15 have a width of approximately 0.3 mm. The low-vaporization interiors begin at a distance of approximately 1.5 mm from the face of the respective electrode. The ignition lines 13 extend approximately 2.4 mm into the gaps 14, 15. The total length of the gaps, including the gusset in the area of the frustoconical part of this column, is approximately 3.7 mm. The diameter of the cylindrical parts 3 of the electrodes 1, 2 is 2.2 mm, the distance between the end faces of the electrodes 1, 2 is 0.6 mm. When using a highly active electrode activation compound 7, the embodiment shown here fulfills the conditions of a surge arrester for 5A / 1s and 2.5kA according to the international standard CCITT 8/20. The wall thickness of the ceramic tube of only 0.5mm gives the surge arrester in connection with the high temperature resistant brazing the required strength. The pressure wave, which occurs particularly during the 2.5 kA test, is absorbed by the shape of the discharge space and the gaps without causing the surge arrester to tear.

Der Zündstrich 13 ist vorteilhaft als Graphitstrich ausgebildet.The ignition line 13 is advantageously designed as a graphite line.

Der Anschlußzapfen 8 kann weggelassen werden, sofern kein Anschlußdraht angeschweißt werden soll.The connecting pin 8 can be omitted if no connecting wire is to be welded on.

Bei einem Durchmesser der muldenförmigen Vertiefung 6 von 1mm bleibt für den Fußpunkt des Lichtbogens ein ausreichend breiter Kupferrand von 0,6mm Breite.With a diameter of the trough-shaped recess 6 of 1 mm, a sufficiently wide copper rim of 0.6 mm width remains for the base point of the arc.

Die hier angegebene Dimensionierung läßt relativ unkritische Fertigungstoleranzen zu. Insbesondere können Keramikrohre der üblichen Toleranz verwendet werden, sie brauchen nicht auf Durchmesser geschliffen zu werden. Ein weiterer Vorteil der erfindungsgemäßen Dimensionierung besteht in einer sehr kleinen elektrischen Kapazität der Anordnung, die durch den kleinen Elektrodendurchmesser erreicht wird. Dadurch können derartige Ableiter in Schaltkreisen mit hoher Eetriebsfrequenz eingesetzt werden, ohne eine unerwünschte Dämpfung der Frequenzen zu ergeben.The dimensioning given here allows relatively uncritical manufacturing tolerances. In particular, ceramic tubes of the usual tolerance can be used, they do not need to be ground to diameter. Another advantage of the dimensioning according to the invention is a very small electrical capacity of the arrangement, which is achieved by the small electrode diameter. As a result, such arresters can be used in circuits with a high operating frequency without giving rise to undesired attenuation of the frequencies.

Claims (3)

1. Überspannungsableiter mit einem gasgefüllten Gehäuse, in dem durch einen rohrförmigen Isolierkörper voneinander beabstandet Kupferelektroden einander gegenüber stehen, welche-sich aus einem kegelstumpfförmigen Teil mit geringer Wandstärke und mit einem an einer Stirnfläche des Isolierkörpers vakuumdicht befestigten Flansch und aus einem zylinderförmigen Teil aus Vollmaterial zusammensetzen, in dem/jede der einander gegenüber stehenden Stirnflächen der Elektroden eine achssymmetrische Vertiefung aufweist, in der eine Elektrodenaktivierungsmasse verankert ist und in dem auf dem Isolierkörper einer oder mehrere Zündstriche angebracht sind, die eng an die Elektroden gekoppelt sind, dadurch gekennzeichnet, daß die Vertiefung in der Stirnfläche jeder Elektrode muldenförmig
ist, daß jede Vertiefung mit einer hochaktiven Elektrodenaktivierungsmasse gefüllt ist, daß zwischen dem zylinderförmigen Teil jeder Elektrode und dem Isolierkörper ein ringförmiger Spalt mit einer Spaltbreite von etwa 0,2mm bis 0,4mm freibleibt, daß der gegenseitige Abstand der Stirnflächen der Elektroden nicht größer ist, als das 3,5fache der Spaltbreite im Bereidh der Zündstreifen, daß das Volumen des Entladungsraumes inclusive der Spalte zumindest 20mm3 beträgt, daß das Isolierrohr aus Keramik besteht und mit den Flanschen der Elektroden durch Hartlöten vakuumdicht verbunden ist und daß der Zündstreifen zumindest 1,5mm in jeden der beiden Spalte und damit jeweils in einen bedampfungsarmen Hinterraum des entsprechenden Spaltes hineinreicht.1. Surge arrester with a gas-filled housing in which copper electrodes are spaced apart from one another by a tubular insulating body, which are composed of a truncated-cone-shaped part with a small wall thickness and with a flange vacuum-tightly fastened to an end face of the insulating body and a cylindrical part made of solid material , in which / each of the opposing end faces of the electrodes has an axially symmetrical recess in which an electrode activation compound is anchored and in which one or more ignition lines are attached to the insulating body and are closely coupled to the electrodes, characterized in that the recess trough-shaped in the face of each electrode
is that each recess is filled with a highly active electrode activation compound, that an annular gap with a gap width of about 0.2 mm to 0.4 mm remains free between the cylindrical part of each electrode and the gap, that the mutual distance between the end faces of the electrodes is not greater than 3.5 times the gap width in the area of the ignition strips, that the volume of the discharge space including the gap is at least 20 mm 3 , that the insulating tube is made of ceramic and is vacuum-tightly connected to the flanges of the electrodes by brazing and that the ignition strip is at least 1, 5mm in each of the two gaps and thus in each case into a low-vaporization rear space of the corresponding gap. 2. Überspannungsableiter nach Anspruch 1, dadurch gekennzeichnet, daß die Spaltlänge je Elektrode zumindest 2,5mm beträgt.2. Surge arrester according to claim 1, characterized in that the gap length per electrode is at least 2.5 mm. 3. Überspannungsableiter nach Anspruch 1, gekennzeichnet durch die folgende Dimensionierung: Spaltbreite 0,3mm, Spaltlänge je Elektrode 3,7mm, Durchmesser der Elektroden 2,2mm, gegenseitiger Abstand der Zylinderflächen der Elektroden 0,6mm, symmetrisch zu den beiden Elektroden angeordnete Zündstriche, die gegenüber beiden Elektroden galvanisch isoliert angeordnet sind und in die beiden Spalte je etwa 2,4mm weit hineinreichen.3. Surge arrester according to claim 1, characterized by the following dimensions: Gap width 0.3mm, gap length per electrode 3.7mm, diameter of the electrodes 2.2mm, mutual distance between the cylindrical surfaces of the electrodes 0.6mm, ignition lines arranged symmetrically to the two electrodes, which are galvanically insulated from both electrodes and in the two gaps Reach about 2.4mm each.
EP83102084A 1982-03-03 1983-03-03 Surge arrester with a gas-filled housing Expired EP0087820B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3207663 1982-03-03
DE19823207663 DE3207663A1 (en) 1982-03-03 1982-03-03 SURGE PROTECTOR WITH A GAS-FILLED HOUSING

Publications (2)

Publication Number Publication Date
EP0087820A1 true EP0087820A1 (en) 1983-09-07
EP0087820B1 EP0087820B1 (en) 1987-08-26

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EP83102084A Expired EP0087820B1 (en) 1982-03-03 1983-03-03 Surge arrester with a gas-filled housing

Country Status (5)

Country Link
US (1) US4493004A (en)
EP (1) EP0087820B1 (en)
JP (1) JPS58163193A (en)
BR (1) BR8301014A (en)
DE (2) DE3207663A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482542A1 (en) * 1990-10-25 1992-04-29 Hoechst CeramTec Aktiengesellschaft Overvoltage arrester
WO2015028436A1 (en) * 2013-08-26 2015-03-05 Phoenix Contact Gmbh & Co. Kg Spark gap having an aging detector and method for measuring the aging of a spark gap

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US5243257A (en) * 1990-10-25 1993-09-07 Hoechst Ceramtec Aktiengesellschaft Surge voltage protector
WO2015028436A1 (en) * 2013-08-26 2015-03-05 Phoenix Contact Gmbh & Co. Kg Spark gap having an aging detector and method for measuring the aging of a spark gap
CN105556771A (en) * 2013-08-26 2016-05-04 菲尼克斯电气公司 Spark gap having an aging detector and method for measuring the aging of a spark gap
CN105556771B (en) * 2013-08-26 2017-06-23 菲尼克斯电气公司 Spark discharge device and its method with aging detection device

Also Published As

Publication number Publication date
BR8301014A (en) 1983-11-22
JPS58163193A (en) 1983-09-27
DE3207663A1 (en) 1983-09-08
DE3373244D1 (en) 1987-10-01
EP0087820B1 (en) 1987-08-26
US4493004A (en) 1985-01-08

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