EP1045419A1 - Electrode arrangement for electrical devices with liquid metal - Google Patents

Electrode arrangement for electrical devices with liquid metal Download PDF

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Publication number
EP1045419A1
EP1045419A1 EP00106491A EP00106491A EP1045419A1 EP 1045419 A1 EP1045419 A1 EP 1045419A1 EP 00106491 A EP00106491 A EP 00106491A EP 00106491 A EP00106491 A EP 00106491A EP 1045419 A1 EP1045419 A1 EP 1045419A1
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Prior art keywords
liquid metal
electrode arrangement
arrangement according
electrode
intermediate layer
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EP00106491A
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German (de)
French (fr)
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EP1045419B1 (en
Inventor
Matthias A. Rosentreter
Suzette Rolle
Peter Terhoeven
Frank Richarz
Andreas Krätzschmar
Thomas Weber
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Eaton Industries GmbH
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Moeller GmbH
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H29/00—Switches having at least one liquid contact
    • H01H29/02—Details
    • H01H29/04—Contacts; Containers for liquid contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H87/00—Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling

Definitions

  • the invention relates to an electrode arrangement for electrical devices with liquid metal according to the preamble of claim 1, in particular for self-recovering current limiting devices.
  • a current limiting device is known from the publication SU 922 911 A, the two just formed to the inside of the current limiting device Contains electrodes made of solid metal by means of pressure-resistant insulating bodies are separated. Inside the insulator are through partition walls Compressor rooms which are partially filled with liquid metal and are located one behind the other trained, which are filled with liquid metal Connection channels of the partition walls are connected. So there is Normal operation via the liquid metal a continuous inner conductive connection between the electrodes. In the current limiting case, the high current density suddenly the liquid metal from the connecting channels repressed. This is the electrical connection of the electrodes via the liquid metal interrupted, which leads to the limitation of the short-circuit current.
  • connection channels fill up after the short circuit has been switched off or eliminated again with liquid metal, whereupon the current limiting device is operational again.
  • DE 40 12 385 A1 as Medium above the liquid level vacuum, protective gas or an insulating Liquid mentioned.
  • SU 1 094 088 A is considered to be a good conductor Material specified for the electrodes copper. It is after pamphlet DE 26 52 506 A1 known, with movable contact devices gallium alloys, in particular to use GaInSn alloys.
  • outer connection elements to inner Clamped contact elements including a coating of liquid metal are.
  • the invention is therefore based on the object of diffusion, corrosion and Erosion of the inner surfaces of the electrodes wetted by the liquid metal is effective to meet.
  • tungsten, molybdenum, Vanadium, nickel, tantalum, titanium, rhenium, chromium or their alloys use.
  • the use of stainless steels, especially those with high CrNi content is advantageous.
  • a material layer which is the remaining electrode material (generally copper) to a high degree against diffusion and corrosion protected by the liquid metal of the intermediate layer.
  • Tungsten, Molybdenum, nickel, chromium or their alloys are proposed.
  • the Material layer can be applied, for example, by electroplating or plating become.
  • the protector there are no special mechanical requirements for the protector posed. It can expediently be used as a thin plate or as sufficiently thick Foil be formed.
  • the one formed by the inner surface of the electrode and the protector is advantageous Gap sealed off from the rest of the liquid metal; in particular, it has a high fill level. This results in a favorable current distribution in front of the electrode, which leads to a reduction the remaining liquid metal and thus the volume of the current limiting device can be used.
  • GaInSn alloys as the liquid metal to be used are simply too handle through their physiological harmlessness.
  • An alloy of 660 parts by weight of gallium, 205 parts by weight of indium and 135 parts by weight Tin is liquid at normal pressure from 10 ° C to 2000 ° C and has adequate electrical conductivity.
  • the invention stands not opposed to other liquid metals with a low melting point, such as For example, the rose or the wood metal to use.
  • Fig. 1 is partially an up and from the broken as well as to Current limiting device broken away to the right, as is the case, for example is known from the publication SU Invention 922 911 shown.
  • an insulating body 2 on all sides surrounded and partially filled with liquid metal 3 current limiting device only the left-hand side is shown and designated 1.
  • the electrode arrangement 1 contains a copper electrode 4, which is in a outer connecting conductor 6 passes over.
  • the electrode 4 is on its inner surface 8 coated with a thin layer of material 10.
  • the material layer 10 is made in the example made of galvanized tungsten and protects the electrode 4 before diffusion of the electrode material in liquid metal and corrosion of the Inner surface 8 through the liquid metal.
  • a protector 14 of an intermediate space 12 In front of the inner surface 8 is left a protector 14 of an intermediate space 12.
  • the protector 14 consists of a material that both has sufficient diffusion resistance compared to the liquid metal 3 as well as sufficient arc resistance having.
  • the protector 14 closes the gap 12 tightly compared to the liquid metal 3 and in the example consists of a stainless steel plate with high relative proportions of chrome and nickel.
  • an intermediate layer 16 made of the same liquid metal Composition (but this is not mandatory) like the rest of the liquid metal 3, for example a GaInSn alloy. So there is an intimate one electrically conductive connection between the liquid metal 3 and the inner surface 8 of the electrode 4.
  • the liquid intermediate layer 16 has a high Level compared to the rest of the liquid metal 3, i.e. the liquid level 18 of the intermediate layer 16 is significantly higher than the liquid level 19 of the remaining liquid metal. This will both in rated operation as well as in the event of a short circuit, a favorable current distribution within the intermediate layer 16 ensures that there is only a small current heating as well as a low probability of arcing can come in the intermediate layer 16.
  • the electrode arrangement 1 is thus largely free of disadvantageous material removal and changes, as in known electrode arrangements of liquid metal containing electrical equipment by the Liquid metal and arcing occur.

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  • Electrodes Of Semiconductors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

The electrode system has a rectangular form, with an electrically isolated body (2). This includes a solid electrode (4) tha connected to an external power circuit. A separate section is filled with a liquid metal (3). These sections are separated by an intermediate layer (16) and a protective layer (14).

Description

Die Erfindung betrifft eine Elektrodenanordnung für elektrische Einrichtungen mit Flüssigmetall nach dem Oberbegriff des Anspruches 1, insbesondere für selbsterholende Strombegrenzungseinrichtungen.The invention relates to an electrode arrangement for electrical devices with liquid metal according to the preamble of claim 1, in particular for self-recovering current limiting devices.

Aus der Druckschrift SU 922 911 A ist eine Strombegrenzungseinrichtung bekannt, die zwei zum Inneren der Strombegrenzungseinrichtung eben ausgebildete Elektroden aus Festmetall enthält, die durch druckfeste Isolierkörper getrennt sind. Innerhalb der Isolierkörper sind durch isolierende Zwischenwände mit Flüssigmetall teilweise aufgefüllte, hintereinander liegende Verdichterräume ausgebildet, die untereinander über mit Flüssigmetall ausgefüllte Verbindungskanäle der Zwischenwände verbunden sind. Damit besteht im Normalbetrieb über das Flüssigmetall eine durchgehende innere leitende Verbindung zwischen den Elektroden. Im Strombegrenzungsfall wird infolge der hohen Stromdichte schlagartig das Flüssigmetall aus den Verbindungskanälen verdrängt. Damit ist die elektrische Verbindung der Elektroden über das Flüssigmetall unterbrochen, was zur Begrenzung des Kurzschlußstromes führt. Nach Abschaltung oder Beseitigung des Kurzschlusses füllen sich die Verbindungskanäle wieder mit Flüssigmetall, worauf die Strombegrenzungseinrichtung emeut betriebsbereit ist. In der Druckschrift DE 40 12 385 A1 wird als Medium über dem Flüssigkeitsspiegel Vakuum, Schutzgas oder eine isolierende Flüssigkeit erwähnt. In der Druckschrift SU 1 094 088 A ist als gut leitendes Material für die Elektroden Kupfer angegeben. Es ist nach Druckschrift DE 26 52 506 A1 bekannt, bei beweglichen Kontakteinrichtungen Gallium-Legierungen, insbesondere GaInSn-Legierungen zu verwenden. In dieser Druckschrift wird auch beschrieben, daß äußere Anschlußelemente an innere Kontaktelemente unter Einschluß eines Überzugs aus Flüssigmetall angeklemmt sind. A current limiting device is known from the publication SU 922 911 A, the two just formed to the inside of the current limiting device Contains electrodes made of solid metal by means of pressure-resistant insulating bodies are separated. Inside the insulator are through partition walls Compressor rooms which are partially filled with liquid metal and are located one behind the other trained, which are filled with liquid metal Connection channels of the partition walls are connected. So there is Normal operation via the liquid metal a continuous inner conductive connection between the electrodes. In the current limiting case, the high current density suddenly the liquid metal from the connecting channels repressed. This is the electrical connection of the electrodes via the liquid metal interrupted, which leads to the limitation of the short-circuit current. The connection channels fill up after the short circuit has been switched off or eliminated again with liquid metal, whereupon the current limiting device is operational again. In the document DE 40 12 385 A1 as Medium above the liquid level vacuum, protective gas or an insulating Liquid mentioned. In the publication SU 1 094 088 A is considered to be a good conductor Material specified for the electrodes copper. It is after pamphlet DE 26 52 506 A1 known, with movable contact devices gallium alloys, in particular to use GaInSn alloys. In this Document is also described that outer connection elements to inner Clamped contact elements including a coating of liquid metal are.

Sowohl im Normalbetrieb durch Diffusion oder Korrosion als auch im Begrenzungsfall durch Lichtbogenerosion gelangt Elektrodenmaterial von den Innenflächen der Elektroden in das Flüssigmetall, was in nachteiliger Weise in erster Linie zu einer allmählichen Auflösung der Elektrodeninnenflächen bis hin zum Lochfraß sowie in zweiter Linie zur Verunreinigung des Flüssigmetalls führt. Dies führt zu einer geringeren Leitfähigkeit der Einrichtung insgesamt und zu einem höheren Schmelzpunkt des Flüssigmetalls im besonderen. Daraus resultiert wiederum eine ungenügende Stabilität und Lebensdauer der elektrischen Einrichtung.Both in normal operation due to diffusion or corrosion as well as in the case of limitation Arc erosion causes electrode material to get from the inner surfaces of the electrodes in the liquid metal, which is disadvantageously in the first place Line for a gradual dissolution of the inner electrode surfaces up to Pitting and secondarily leads to contamination of the liquid metal. This leads to a lower conductivity of the device as a whole and to a higher melting point of the liquid metal in particular. This results in turn, insufficient stability and durability of the electrical Facility.

Der Erfindung liegt daher die Aufgabe zugrunde, der Diffusion, Korrosion und Erosion der vom Flüssigmetall benetzten Innenflächen der Elektroden wirksam zu begegnen.The invention is therefore based on the object of diffusion, corrosion and Erosion of the inner surfaces of the electrodes wetted by the liquid metal is effective to meet.

Ausgehend von einer Elektrodenanordnung der eingangs genannten Art wird die Aufgabe erfindungsgemäß durch die kennzeichnenden Merkmale des unabhängigen Anspruches gelöst, während den abhängigen Ansprüchen vorteilhafte Weiterbildungen der Erfindung zu entnehmen sind.Starting from an electrode arrangement of the type mentioned at the beginning the task according to the invention by the characterizing features of the independent Claim solved, while the dependent claims advantageous Further developments of the invention can be found.

Durch die Zwischenschicht aus Flüssigmetall und dem vorgelagerten Protektor wird die Innenfläche der Elektrode weitgehend vor den erodierenden Einflüssen im übrigen Flüssigmetall entstehender Lichtbögen und in einem gewissen Maße auch vor Diffusion und Korrosion gegenüber dem Flüssigmetall geschützt. Damit wird eine Elektrodenanordnung vorgeschlagen, die durch die Zwischenschicht eine ausgezeichnete elektrische Verbindung zwischen Elektrode und Protektor gewährleistet, ohne daß es technologisch aufwendiger Verbindungstechniken für die unterschiedlichen Materialien der Elektrode einerseits und des Protektors anderseits bedarf.Through the intermediate layer of liquid metal and the upstream protector the inner surface of the electrode is largely before the eroding influences in the remaining liquid metal arcing and in a certain Dimensions also protected against diffusion and corrosion against the liquid metal. An electrode arrangement is thus proposed, which is characterized by the Interlayer an excellent electrical connection between the electrode and protector without being technologically complex Connection techniques for the different materials of the electrode on the one hand and the protector on the other.

Für das Festmaterial des Protektors sind vorteilhaft Wolfram, Molybdän, Vanadium, Nickel, Tantal, Titan, Rhenium, Chrom oder deren Legierungen zu verwenden. Auch die Verwendung von Edelstählen, insbesondere solchen mit hohem CrNi-Gehalt, ist vorteilhaft. For the solid material of the protector, tungsten, molybdenum, Vanadium, nickel, tantalum, titanium, rhenium, chromium or their alloys use. The use of stainless steels, especially those with high CrNi content is advantageous.

Eine vorteilhafte Weiterbildung der Erfindung besteht darin, daß auf der Innenfläche eine Materialschicht aufgebracht ist, welche das übrige Elektrodenmaterial (im allgemeinen Kupfer) im hohen Maße vor Diffusion und Korrosion durch das Flüssigmetall der Zwischenschicht schützt. Damit ist eine langzeitlich stabile Elektrodenanordnung entstanden, die einerseits durch den Protektor gegen die schädlichen Einflüsse von Lichtbögen und anderseits durch die Materialschicht gegen die schädlichen Einflüsse des Flüssigmetalls ausreichend geschützt ist. Für diese Materialschicht werden vorteilhaft Wolfram, Molybdän, Nickel, Chrom oder deren Legierungen vorgeschlagen. Die Materialschicht kann beispielsweise durch Galvanisieren oder Plattieren aufgebracht werden.An advantageous development of the invention is that on the Inner surface of a material layer is applied, which is the remaining electrode material (generally copper) to a high degree against diffusion and corrosion protected by the liquid metal of the intermediate layer. This is a long-term stable electrode arrangement emerged, on the one hand by the Protector against the harmful effects of arcing and other through the material layer against the harmful influences of the liquid metal is adequately protected. Tungsten, Molybdenum, nickel, chromium or their alloys are proposed. The Material layer can be applied, for example, by electroplating or plating become.

An den Protektor werden keine besonderen mechanischen Anforderungen gestellt. Er kann zweckmäßig als dünne Platte oder als ausreichend dicke Folie ausgebildet sein.There are no special mechanical requirements for the protector posed. It can expediently be used as a thin plate or as sufficiently thick Foil be formed.

Vorteilhaft ist der von der Innenfläche der Elektrode und dem Protektor gebildete Zwischenraum gegenüber dem übrigen Flüssigmetall dicht abgeschlossen; insbesondere weist er einen hohen Füllstand auf. Dadurch ergibt sich eine günstige Stromverteilung vor der Elektrode, was zu einer Reduzierung des übrigen Flüssigmetalls und damit des Bauvolumens der Strombegrenzungseinrichtung genutzt werden kann.The one formed by the inner surface of the electrode and the protector is advantageous Gap sealed off from the rest of the liquid metal; in particular, it has a high fill level. This results in a favorable current distribution in front of the electrode, which leads to a reduction the remaining liquid metal and thus the volume of the current limiting device can be used.

GaInSn-Legierungen als zu verwendendes Flüssigmetall sind einfach zu handhaben durch ihre physiologische Unbedenklichkeit. Eine Legierung aus 660 Gewichtsanteilen Gallium, 205 Gewichtsanteilen Indium und 135 Gewichtsanteilen Zinn ist bei Normaldruck von 10°C bis 2000°C flüssig und besitzt eine ausreichende elektrische Leitfähigkeit. Der Erfindung steht es jedoch nicht entgegen, auch andere Flüssigmetalle mit niedrigem Schmelzpunkt, wie beispielsweise das Rose- oder das Wood-Metall, zu verwenden. GaInSn alloys as the liquid metal to be used are simply too handle through their physiological harmlessness. An alloy of 660 parts by weight of gallium, 205 parts by weight of indium and 135 parts by weight Tin is liquid at normal pressure from 10 ° C to 2000 ° C and has adequate electrical conductivity. However, the invention stands not opposed to other liquid metals with a low melting point, such as For example, the rose or the wood metal to use.

Weitere Einzelheiten der Erfindung werden in dem nachfolgend beschriebenen Ausführungsbeispiel erläutert, wobei in der einzigen Figur 1 eine erfindungsgemäße Elektrodenanordnung in geöffneter perspektivischer Darstellung gezeigt ist.Further details of the invention are described in the following Exemplary embodiment explained, in the single Figure 1, an inventive Electrode arrangement in an open perspective view is shown.

In Fig. 1 ist teilweise eine nach oben und vom aufgebrochene sowie nach rechts weggebrochene Strombegrenzungseinrichtung, wie sie beispielsweise aus der Druckschrift SU-Erfindungsschrift 922 911 bekannt ist, dargestellt. Von den beiden Elektrodenanordnungen der allseitig von einem Isolierkörper 2 umgebenen und zum Teil mit Flüssigmetall 3 gefüllte Strombegrenzungseinrichtung ist nur die linksseitige dargestellt und mit 1 bezeichnet.In Fig. 1 is partially an up and from the broken as well as to Current limiting device broken away to the right, as is the case, for example is known from the publication SU Invention 922 911 shown. Of the two electrode arrangements, an insulating body 2 on all sides surrounded and partially filled with liquid metal 3 current limiting device only the left-hand side is shown and designated 1.

Die Elektrodenanordnung 1 enthält eine kupfeme Elektrode 4, die in einen äußeren Anschlußleiter 6 übergeht. Die Elektrode 4 ist an ihrer Innenfläche 8 mit einer dünnen Materialschicht 10 beschichtet. Die Materialschicht 10 besteht im Beispiel aus aufgalvanisiertem Wolfram und schützt die Elektrode 4 vor Diffusion des Elektrodenmaterials in Flüssigmetall und Korrosion der Innenfläche 8 durch das Flüssigmetall. Vor der Innenfläche 8 ist unter Belassung eines Zwischenraumes 12 ein Protektor 14 angeordnet. Der Protektor 14 besteht aus einem Material, das sowohl eine ausreichende Diffusionsbeständigkeit gegenüber dem Flüssigmetall 3 als auch eine ausreichende Lichtbogenfestigkeit aufweist. Der Protektor 14 schließt den Zwischenraum 12 dicht gegenüber dem Flüssigmetall 3 ab und besteht im Beispiel aus einem Edelstahlplättchen mit hohen relativ Anteilen von Chrom und Nickel. In dem Zwischenraum 12 befindet sich eine Zwischenschicht 16 aus Flüssigmetall gleicher Zusammensetzung (dies ist jedoch nicht zwingend) wie das übrige Flüssigmetall 3, beispielsweise eine GaInSn-Legierung. Damit besteht eine innige elektrisch leitende Verbindung zwischen dem Flüssigmetall 3 und der Innenfläche 8 der Elektrode 4. Die flüssige Zwischenschicht 16 weist einen hohen Füllstand gegenüber dem übrigen Flüssigmetall 3 auf, d.h., der Flüssigkeitsspiegel 18 der Zwischenschicht 16 ist wesentlich höher als der Flüssigkeitsspiegel 19 des übrigen Flüssigmetalls. Dadurch wird sowohl im Nennbetrieb als auch bei Kurzschluß eine günstige Stromverteilung innerhalb der Zwischenschicht 16 gewährleistet, so daß es nur zu einer geringen Stromerwärmung sowie zu einer geringen Wahrscheinlichkeit zur Ausbildung von Lichtbögen in der Zwischenschicht 16 kommen kann.The electrode arrangement 1 contains a copper electrode 4, which is in a outer connecting conductor 6 passes over. The electrode 4 is on its inner surface 8 coated with a thin layer of material 10. The material layer 10 is made in the example made of galvanized tungsten and protects the electrode 4 before diffusion of the electrode material in liquid metal and corrosion of the Inner surface 8 through the liquid metal. In front of the inner surface 8 is left a protector 14 of an intermediate space 12. The protector 14 consists of a material that both has sufficient diffusion resistance compared to the liquid metal 3 as well as sufficient arc resistance having. The protector 14 closes the gap 12 tightly compared to the liquid metal 3 and in the example consists of a stainless steel plate with high relative proportions of chrome and nickel. In the space 12 there is an intermediate layer 16 made of the same liquid metal Composition (but this is not mandatory) like the rest of the liquid metal 3, for example a GaInSn alloy. So there is an intimate one electrically conductive connection between the liquid metal 3 and the inner surface 8 of the electrode 4. The liquid intermediate layer 16 has a high Level compared to the rest of the liquid metal 3, i.e. the liquid level 18 of the intermediate layer 16 is significantly higher than the liquid level 19 of the remaining liquid metal. This will both in rated operation as well as in the event of a short circuit, a favorable current distribution within the intermediate layer 16 ensures that there is only a small current heating as well as a low probability of arcing can come in the intermediate layer 16.

Damit ist die Elektrodenanordnung 1 weitgehend frei von nachteiligen Materialabtragungen und -veränderungen, wie sie bei bekannten Elektrodenanordnungen von Flüssigmetall enthaltenden elektrischen Einrichtungen durch das Flüssigmetall und auftretende Lichtbögen auftreten.The electrode arrangement 1 is thus largely free of disadvantageous material removal and changes, as in known electrode arrangements of liquid metal containing electrical equipment by the Liquid metal and arcing occur.

Claims (10)

Elektrodenanordnung für elektrische Einrichtungen mit Flüssigmetall, wobei eine Elektrode (4) aus Festmetall zum Anschließen an einen äußeren Stromkreis vorgesehen ist, die im Inneren eines Isolierkörpers (2) mit ihrer Innenfläche (8) elektrisch leitend mit dem Flüssigmetall (3) in Verbindung steht, dadurch gekennzeichnet, daß die Innenfläche (8) über eine Zwischenschicht (16) aus Flüssigmetall innig mit einem Protektor (14) aus Festmaterial elektrisch verbunden ist, wobei das Festmaterial im Verhältnis zum Material der Elektrode (4) sowohl diffusionsbeständiger gegenüber dem Flüssigmetall (3) und der Zwischenschicht (16) als auch abbrandfester gegenüber Lichtbogeneinflüssen ist.Electrode arrangement for electrical devices with liquid metal, wherein an electrode (4) made of solid metal is provided for connection to an external circuit, the inside surface of an insulating body (2) being electrically conductively connected to the liquid metal (3), characterized in that the inner surface (8) is intimately electrically connected to a protector (14) made of solid material via an intermediate layer (16) made of liquid metal, the solid material being both more diffusion resistant than the liquid metal (3) in relation to the material of the electrode (4) and the intermediate layer (16) and is more erosion-resistant to arcing influences. Elektrodenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Festmaterial aus Wolfram, Molybdän, Vanadium, Nickel, Tantal, Titan, Rhenium, Chrom oder deren Legierungen besteht.Electrode arrangement according to claim 1, characterized in that the solid material consists of tungsten, molybdenum, vanadium, nickel, tantalum, titanium, rhenium, chromium or their alloys. Elektrodenanordnung nach Anspruch 1, dadurch gekennzeichnet, daß das Festmaterial aus hochlegiertem Edelstahl besteht.Electrode arrangement according to claim 1, characterized in that the solid material consists of high-alloy stainless steel. Elektrodenanordnung nach Anspruch 3, dadurch gekennzeichnet, daß das Festmaterial aus Edelstahl mit hohem CrNi-Gehalt besteht.Electrode arrangement according to claim 3, characterized in that the solid material consists of stainless steel with a high CrNi content. Elektrodenanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß auf der Innenfläche (8) eine elektrisch leitende Materialschicht (10) aufgebracht ist, die gegenüber der Zwischenschicht (16) eine hohe Diffusionsbeständigkeit aufweist.Electrode arrangement according to one of the preceding claims, characterized in that an electrically conductive material layer (10) is applied to the inner surface (8), which has a high diffusion resistance compared to the intermediate layer (16). Elektrodenanordnung nach Anspruch 5, dadurch gekennzeichnet, daß die Materialschicht (16) aus Wolfram, Molybdän, Nickel, Chrom oder deren Legierungen besteht. Electrode arrangement according to claim 5, characterized in that the material layer (16) consists of tungsten, molybdenum, nickel, chromium or their alloys. Elektrodenanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Protektor (14) planen- oder folienförmig ausgebildet ist.Electrode arrangement according to one of the preceding claims, characterized in that the protector (14) is designed in the form of a plane or film. Elektrodenanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß sich die Zwischenschicht (16) in einem gegenüber dem übrigen Flüssigmetall (3) dicht abgeschlossenen Zwischenraum (12) befindet.Electrode arrangement according to one of the preceding claims, characterized in that the intermediate layer (16) is located in an intermediate space (12) which is sealed off from the rest of the liquid metal (3). Elektrodenanordnung nach Anspruch 8, dadurch gekennzeichnet, daß die Zwischenschicht (16) gegenüber dem übrigen Flüssigmetall (3) einen hohen Füllstand aufweist.Electrode arrangement according to Claim 8, characterized in that the intermediate layer (16) has a high fill level compared to the rest of the liquid metal (3). Elektrodenanordnung nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das Flüssigmetall (3) und die Zwischenschicht (16) aus einer GaInSn-Legierung bestehen.Electrode arrangement according to one of the preceding claims, characterized in that the liquid metal (3) and the intermediate layer (16) consist of a GaInSn alloy.
EP00106491A 1999-04-12 2000-03-25 Electrode arrangement for electrical devices with liquid metal Expired - Lifetime EP1045419B1 (en)

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DE19916322A DE19916322A1 (en) 1999-04-12 1999-04-12 Electrode arrangement for electrical devices with liquid metal
DE19916322 1999-04-12

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EP1045419B1 EP1045419B1 (en) 2006-08-16

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US3670282A (en) * 1968-08-07 1972-06-13 Mitsubishi Electric Corp Current limiting device
DE2028593A1 (en) * 1969-06-10 1971-01-07 Mitsubishi Denki K K , Tokio Current limiter
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WO2023041198A1 (en) * 2021-09-15 2023-03-23 Eaton Intelligent Power Limited Electrical contact system with liquid metal layer and diffusion barrier

Also Published As

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ATE336800T1 (en) 2006-09-15
EP1045419B1 (en) 2006-08-16
DE19916322A1 (en) 2000-10-19
DE50013316D1 (en) 2006-09-28

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