EP0254089A1 - Vacuum switch tube - Google Patents

Vacuum switch tube Download PDF

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Publication number
EP0254089A1
EP0254089A1 EP87109468A EP87109468A EP0254089A1 EP 0254089 A1 EP0254089 A1 EP 0254089A1 EP 87109468 A EP87109468 A EP 87109468A EP 87109468 A EP87109468 A EP 87109468A EP 0254089 A1 EP0254089 A1 EP 0254089A1
Authority
EP
European Patent Office
Prior art keywords
soldered
walled
thin
ceramic part
vacuum interrupter
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.)
Granted
Application number
EP87109468A
Other languages
German (de)
French (fr)
Other versions
EP0254089B1 (en
Inventor
Günther Ing. Bialkowski
Burkhard Dipl.-Ing. Mick
Klaus Ing. Oberndörfer
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.)
Siemens AG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP0254089A1 publication Critical patent/EP0254089A1/en
Application granted granted Critical
Publication of EP0254089B1 publication Critical patent/EP0254089B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66261—Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations
    • H01H2033/66276—Details relating to the mounting of screens in vacuum switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/662—Housings or protective screens
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing

Definitions

  • the present invention relates to a vacuum interrupter according to the preamble of claim 1.
  • a vacuum interrupter is known from US-PS 37 66 345.
  • the vacuum interrupter described there has a relatively complicated structure, it contains a large number of solder joints and other metal-ceramic connections.
  • the shield construction alone requires a large number of holding arms, which are soldered on the one hand to the shield and on the other hand to the thick-walled metal part.
  • the object on which the present invention is based is to simplify the structure and simplify the manufacturing process.
  • the metal parts advantageously consist of a material whose temperature coefficient is not matched to the temperature coefficient of the ceramic part.
  • the metal parts can be made of copper or stainless steel and the ceramic part can be made of aluminum oxide ceramic.
  • the assembly is advantageously carried out in a process in which the metal parts, the ceramic part and the screen are soldered to one another in one operation.
  • the structure can be assembled easily and without any special requirements for an assembly form and soldered in a soldering process.
  • the screen In the position shown, the screen can be held in position by gravity until the soldering has taken place.
  • a switching tube has a housing 1 and switching contacts 2 and 3 arranged coaxially with one another.
  • the housing 1 is composed of metal caps 4 and 5 and a ceramic ring as a ceramic part 6.
  • the metal caps 4 and 5 have thin-walled cylinder regions 7, at least one metal part 5 at the transition from the thick-walled part 11 to the thin-walled cylinder region 7 having a step 8 on its inner wall, which extends outward in the radial direction.
  • a vapor screen 9 has an edge region 10 which is widened outwards.
  • the edge region 10 lies against the thin-walled cylinder region 7 and against the step 8 of the cap 5 and is brazed there to the cap 5.
  • the thin-walled cylinder regions 7 are butt-soldered onto the ceramic ring 6 and their wall thickness is such that the bracing that occurs during soldering is absorbed by the soldering point due to different thermal expansion between the ceramic ring 6 and the thin-walled cylinder region 7 and does not lead to a leak in the tube.
  • the screen 9 covers the ceramic part 6 in the axial direction, so that a screen 9 is sufficient for steam shielding.
  • the screen 9 can be used in the manufacture and applied to the step 8 and remains there solely due to gravity when the tube is held in the position shown when soldering.
  • the other parts can also be Stack soldering on top of each other without expensive holding devices and can be soldered in one operation.
  • the one-sided arrangement of the contacts in the area of the lower metal cap 5 is advantageous, since a relatively large switching space is available here and the metal vapor that is produced can be kept away from the ceramic part 6 particularly well.

Abstract

Eine Vakuumschaltröhre mit einem einfach aufgebauten Gehäuse (1) ist gegeben, indem kappenartige Metallteile (4, 5) auf die Stirnflächen eines Keramikteiles (6) stumpf aufgelötet sind, indem die Metallteile (4, 5) im Bereich der Keramikteile (6) einen Zylinderbereich (7) verringerter Wandstärke aufweisen, indem beim Übergang zum dickwandigen Bereich (11) eine Stufe (8) in der Innenwand gebildet ist, indem ein Dampfschirm (9) einen erweiterten Randbereich (10) besitzt und indem dieser Randbereich (10) am dünnwandigen Zylinderbereich (7) und an der Stufe (8) anliegt und dort verlötet ist. Die Erfindung eignet sich für Vakuumschaltröhren, in denen der Temperaturkoeffizient der Metallteile nicht an den Temperaturkoeffizienten des Keramikteiles angepaßt ist.A vacuum interrupter with a simply constructed housing (1) is provided in that cap-like metal parts (4, 5) are butt-soldered onto the end faces of a ceramic part (6), in that the metal parts (4, 5) have a cylinder area in the area of the ceramic parts (6) (7) have reduced wall thickness, in that a step (8) is formed in the inner wall at the transition to the thick-walled area (11), in that a steam screen (9) has an enlarged edge area (10) and in that this edge area (10) on the thin-walled cylinder area (7) and at stage (8) and is soldered there. The invention is suitable for vacuum interrupters in which the temperature coefficient of the metal parts is not matched to the temperature coefficient of the ceramic part.

Description

Die vorliegende Erfindung betrifft eine Vakuumschaltröhre nach dem 0berbegriff des Patentanspruchs 1. Eine derartige Vakuum­schaltröhre ist aus der US-PS 37 66 345 bekannt. Die dort be­schriebene Vakuumschaltröhre ist relativ kompliziert aufgebaut, sie enthält eine Vielzahl von Lötstellen und anderen Metall-­Keramik-Verbindungen. Allein die Schirmkonstruktion verlangt eine Vielzahl von Haltearmen, die einerseits mit dem Schirm und andererseits mit dem dickwandigen Metallteil verlötet sind.The present invention relates to a vacuum interrupter according to the preamble of claim 1. Such a vacuum interrupter is known from US-PS 37 66 345. The vacuum interrupter described there has a relatively complicated structure, it contains a large number of solder joints and other metal-ceramic connections. The shield construction alone requires a large number of holding arms, which are soldered on the one hand to the shield and on the other hand to the thick-walled metal part.

Dem gegenüber besteht die Aufgabe, die der vorliegenden Erfin­dung zugrundeliegt, in einer Vereinfachung des Aufbaus und in einer Vereinfachung des Herstellungsverfahrens.In contrast, the object on which the present invention is based is to simplify the structure and simplify the manufacturing process.

Diese Aufgabe wird durch die kennzeichnenden Merkmale des Pa­tentanspruchs 1 gelöst.This object is achieved by the characterizing features of patent claim 1.

Dabei bestehen die Metallteile vorteilhaft aus einem Material, dessen Temperaturkoeffizient an den Temperaturkoeffizienten des Keramikteiles nicht angepaßt ist. Beispielsweise können die Me­tallteile aus Kupfer oder rostfreien Stahl und das Keramikteil aus Aluminiumoxidkeramik bestehen.The metal parts advantageously consist of a material whose temperature coefficient is not matched to the temperature coefficient of the ceramic part. For example, the metal parts can be made of copper or stainless steel and the ceramic part can be made of aluminum oxide ceramic.

Der Zusammenbau erfolgt vorteilhaft in einem Verfahren, in dem die Metallteile, das Keramikteil und der Schirm in einem Ar­beitsgang miteinander verlötet werden.The assembly is advantageously carried out in a process in which the metal parts, the ceramic part and the screen are soldered to one another in one operation.

Besonders kleine Toleranzen können eingehalten werden, indem der Schirm und die Metallteile aus demselben Material bestehen. Dabei ist vorteilhaft nur ein Schirm vorgesehen, welcher das gesamte Keramikteil in axialer Richtung überdeckt.Particularly small tolerances can be maintained if the screen and the metal parts are made of the same material. Only one screen is advantageously provided, which covers the entire ceramic part in the axial direction.

Der Aufbau läßt sich leicht und ohne besondere Anforderungen an eine Montageform zusammensetzen und in einem Lötvorgang ver­löten. Der Schirm kann dabei in der gezeigten Lage durch die Schwerkraft in Position gehalten werden, bis die Lötung erfolgt ist.The structure can be assembled easily and without any special requirements for an assembly form and soldered in a soldering process. In the position shown, the screen can be held in position by gravity until the soldering has taken place.

Die Erfindung wird nun anhand einer Figur näher erläutert. Sie ist nicht auf das in der Figur gezeigte Beispiel beschränkt.The invention will now be explained in more detail with reference to a figure. It is not limited to the example shown in the figure.

Eine Schaltröhre weist ein Gehäuse 1 und zueinander koaxial angeordnete Schaltkontakte 2 und 3 auf. Das Gehäuse 1 setzt sich aus Metallkappen 4 und 5 und einem Keramikring als Kera­mikteil 6 zusammen. Die Metallkappen 4 und 5 weisen dünnwandi­ge Zylinderbereiche 7 auf, wobei zumindest ein Metallteil 5 am Übergang vom dickwandigen Teil 11 zum dünnwandigen Zylinderbe­reich 7 an seiner Innenwand eine Stufe 8 besitzt, die in radi­aler Richtung nach außen reicht.A switching tube has a housing 1 and switching contacts 2 and 3 arranged coaxially with one another. The housing 1 is composed of metal caps 4 and 5 and a ceramic ring as a ceramic part 6. The metal caps 4 and 5 have thin-walled cylinder regions 7, at least one metal part 5 at the transition from the thick-walled part 11 to the thin-walled cylinder region 7 having a step 8 on its inner wall, which extends outward in the radial direction.

Ein Dampfschirm 9 besitzt einen nach außen aufgeweiteten Rand­bereich 10. Der Randbereich 10 liegt am dünnwandigen Zylinder­bereich 7 und an der Stufe 8 der Kappe 5 an und ist dort mit der Kappe 5 hartverlötet.A vapor screen 9 has an edge region 10 which is widened outwards. The edge region 10 lies against the thin-walled cylinder region 7 and against the step 8 of the cap 5 and is brazed there to the cap 5.

Die dünnwandigen Zylinderbereiche 7 sind auf den Keramikring 6 stumpf aufgelötet und in ihrer Wanddicke so bemessen, daß die bei der Lötung auftretende Verspannung durch unterschiedliche Wärmedehnung zwischen dem Keramikring 6 und dem dünnwandigen Zylinderbereich 7 von der Lötstelle aufgenommen wird und nicht zur Undichtigkeit der Röhre führt.The thin-walled cylinder regions 7 are butt-soldered onto the ceramic ring 6 and their wall thickness is such that the bracing that occurs during soldering is absorbed by the soldering point due to different thermal expansion between the ceramic ring 6 and the thin-walled cylinder region 7 and does not lead to a leak in the tube.

Der Schirm 9 überdeckt das Keramikteil 6 in axialer Richtung, so daß ein Schirm 9 zur Dampfabschirmung ausreicht. Dadurch kann bei der Herstellung der Schirm 9 eingesetzt und an die Stufe 8 angelegt werden und verbleibt dort allein infolge der Schwerkraft, wenn die Röhre beim Verlöten in der dargestellten Lage gehalten wird. Auch die übrigen Teile lassen sich zum Verlöten ohne aufwendige Haltevorrichtungen übereinander stapeln und können in einem Arbeitsgang verlötet werden.The screen 9 covers the ceramic part 6 in the axial direction, so that a screen 9 is sufficient for steam shielding. As a result, the screen 9 can be used in the manufacture and applied to the step 8 and remains there solely due to gravity when the tube is held in the position shown when soldering. The other parts can also be Stack soldering on top of each other without expensive holding devices and can be soldered in one operation.

Bei dieser Ausführungsform ist die einseitige Anordnung der Kon­takte im Bereich der unteren Metallkappe 5 vorteilhaft, da hier ein relativ großer Schaltraum zur Verfügung steht und der ent­stehende Metalldampf besonders gut vom Keramikteil 6 ferngehal­ten werden kann.In this embodiment, the one-sided arrangement of the contacts in the area of the lower metal cap 5 is advantageous, since a relatively large switching space is available here and the metal vapor that is produced can be kept away from the ceramic part 6 particularly well.

Bezugszeichenliste Reference symbol list

  • 1 = Gehäuse1 = housing
  • 2, 3 = Schaltkontakt2, 3 = switch contact
  • 4, 5 = Metallteil4, 5 = metal part
  • 6 = Keramikteil6 = ceramic part
  • 7 = dünnwandiger Zylinderbereich7 = thin-walled cylinder area
  • 8 = Stufe8 = level
  • 9 = Dampfschirm9 = steam screen
  • 10 = Randbereich10 = edge area
  • 11 = dickwandiger Teil11 = thick-walled part

Claims (5)

1. Vakuumschaltröhre mit einem Gehäuse, welches aus zumindest einem Keramikteil und Metallteilen zusammengesetzt ist, wobei zumindest ein Metallteil einen dickwandigen und einen dünnwan­digen Zylinderbereich enthält, wobei am Übergang vom dickwan­digen zum dünnwandigen Zylinderbereich in der Innenwand eine in radialer Richtung nach außen verlaufende Stufe gebildet ist, wobei der dünnwandige Zylinderbereich an die Stirnfläche des Keramikteiles anschließt, wobei ein Dampfschirm vorgesehen ist und wobei der Dampfschirm an der Stufe des Metallteiles angelö­tet ist, dadurch gekennzeichnet, daß zumindest ein Metallteil kappenförmig ausgebildet und auf die Stirnfläche des Keramikteiles stumpf aufgelötet ist, daß der Dampfschirm einen in radialer Richtung aufgeweiteten Randbereich besitzt und daß der aufgeweitete Randbereich an den Durchmesser des dünnwandigen Zylinderbereiches angepaßt ist, an der Stufe anliegt und dort verlötet ist.1. Vacuum interrupter with a housing which is composed of at least one ceramic part and metal parts, at least one metal part containing a thick-walled and a thin-walled cylinder region, a step extending radially outward being formed in the inner wall at the transition from the thick-walled to the thin-walled cylinder region , wherein the thin-walled cylinder region adjoins the end face of the ceramic part, a steam shield being provided and the steam shield being soldered to the step of the metal part, characterized in that at least one metal part is cap-shaped and is butt-soldered to the end face of the ceramic part so that the Steam screen has an edge region widened in the radial direction and that the widened edge region is adapted to the diameter of the thin-walled cylinder region, bears against the step and is soldered there. 2. Vakuumschaltröhre nach Anspruch 1, dadurch gekenn­zeichnet, daß die Metallteile aus einem Material beste­hen, dessen Temperaturkoeffizient an den Temperaturkoeffizienten des Keramikteiles nicht angepaßt ist.2. Vacuum interrupter according to claim 1, characterized in that the metal parts consist of a material whose temperature coefficient is not adapted to the temperature coefficient of the ceramic part. 3. Vakuumschaltröhre nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß der Dampfschirm und das Me­tallteil aus demselben Material bestehen.3. Vacuum interrupter according to one of claims 1 to 2, characterized in that the steam screen and the metal part consist of the same material. 4. Vakuumschaltröhre nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß nur ein Dampfschirm vorgese­hen ist, welcher das gesamte Keramikteil in axialer Richtung überdeckt.4. Vacuum interrupter according to one of claims 1 to 3, characterized in that only a steam screen is provided which covers the entire ceramic part in the axial direction. 5.Verfahren zur Herstellung einer Vakuumchaltröhre nach einem der Ansprüche 1 bis 4, dadurch gekennzeich­net, daß der Dampfschirm und ein Lotring in ein untenliegen­ des Metallteil eingesetzt wird und daß das Metallteil, das Ke­ramikteil und der Dampfschirm in einem Arbeitsgang miteinander verlötet werden.5.The method for producing a vacuum interrupter according to one of claims 1 to 4, characterized in that the steam screen and a solder ring are in a below of the metal part is used and that the metal part, the ceramic part and the steam screen are soldered together in one operation.
EP87109468A 1986-07-11 1987-07-01 Vacuum switch tube Expired - Lifetime EP0254089B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3623457 1986-07-11
DE19863623457 DE3623457A1 (en) 1986-07-11 1986-07-11 VACUUM SWITCH TUBES

Publications (2)

Publication Number Publication Date
EP0254089A1 true EP0254089A1 (en) 1988-01-27
EP0254089B1 EP0254089B1 (en) 1992-01-08

Family

ID=6304986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109468A Expired - Lifetime EP0254089B1 (en) 1986-07-11 1987-07-01 Vacuum switch tube

Country Status (5)

Country Link
US (1) US4746777A (en)
EP (1) EP0254089B1 (en)
JP (1) JPS6329423A (en)
CA (1) CA1296038C (en)
DE (3) DE8618632U1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9319945U1 (en) * 1993-12-21 1995-04-20 Siemens Ag Solder ring for vacuum electronic components
DE4401356A1 (en) * 1994-01-14 1995-07-20 Siemens Ag Vacuum switching tube with special current terminal
US5661281A (en) * 1993-06-18 1997-08-26 Siemens Aktiengesellschaft Vacuum-type interrupter having an annular insulator
DE19713478C1 (en) * 1997-03-18 1998-04-09 Siemens Ag Vacuum switch tube e.g. for low-voltage switching
DE102018220928A1 (en) 2018-12-04 2020-06-04 Siemens Aktiengesellschaft Improvement of the surface properties of contact materials

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803778A1 (en) * 1988-02-09 1989-08-17 Licentia Gmbh Vacuum switch with flat or corrugated elastic disc. - used as intermediate piece between fixed-contacts bolt and casings ceramic tube
US5289991A (en) * 1990-07-04 1994-03-01 Shimano Inc. Spinning reel
JPH0460064U (en) * 1990-09-25 1992-05-22
DE4129008A1 (en) * 1991-08-28 1992-01-16 Slamecka Ernst Two=part housing vacuum switch - has one part of pot-shaped conductive material and other part of insulating material and two relatively axially moving contacts
DE4431067A1 (en) * 1993-12-24 1995-06-29 Abb Patent Gmbh Vacuum interrupter
DE19510850C1 (en) * 1995-03-17 1996-07-25 Siemens Ag Vacuum switch tube for low voltage protection
DE19826766C1 (en) * 1998-06-12 2000-03-30 Siemens Ag Vacuum interrupter with a steam shield assigned to the insulator
DE10007907C2 (en) * 1999-06-10 2002-03-14 Abb T & D Tech Ltd Vacuum interrupter chamber
US10541094B1 (en) * 2018-07-27 2020-01-21 Eaton Intelligent Power Limited Vacuum interrupter with radial bellows
CN109273315B (en) * 2018-10-23 2024-03-12 陕西宝光真空电器股份有限公司 Method for fixing shielding cylinder and porcelain shell and vacuum arc-extinguishing chamber

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1353161A (en) * 1962-02-23 1964-02-21 Thomson Houston Comp Francaise Vacuum interval device
GB1184590A (en) * 1967-11-29 1970-03-18 Ass Elect Ind Improvements in or relating to Vacuum Electric Switches.
DE2612129A1 (en) * 1975-03-22 1976-10-07 Gemvac Kk VACUUM CIRCUIT BREAKER
GB2035697A (en) * 1978-11-17 1980-06-18 Westinghouse Electric Corp Low voltage vacuum switches
FR2450794A1 (en) * 1979-03-05 1980-10-03 Hazemeijer Bv METHOD FOR MANUFACTURING A JOINT BETWEEN A CERAMIC PIECE AND A STAINLESS STEEL PIECE, JOINT, VACUUM SWITCH AND SPLITER THEREFOR
EP0084238A1 (en) * 1981-12-19 1983-07-27 Kabushiki Kaisha Meidensha Vacuum interrupter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3590197A (en) * 1968-10-31 1971-06-29 Allis Chalmers Mfg Co Electrical contacts containing gettering material
US3612795A (en) * 1969-01-09 1971-10-12 Westinghouse Electric Corp Shielding arrangements for vacuum-type circuit interrupters of the two-contact type
JPS58165225A (en) * 1982-03-26 1983-09-30 株式会社日立製作所 Vacuum breaker
DE8334848U1 (en) * 1983-12-05 1986-05-07 Siemens AG, 1000 Berlin und 8000 München Vacuum switch for the low voltage range, especially low voltage contactor
US4661666A (en) * 1985-05-28 1987-04-28 Kabushiki Kaisha Meidensha Vacuum interrupter
US4707577A (en) * 1986-04-05 1987-11-17 Kabushiki Kaisha Meidensha Vacuum interrupter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1353161A (en) * 1962-02-23 1964-02-21 Thomson Houston Comp Francaise Vacuum interval device
GB1184590A (en) * 1967-11-29 1970-03-18 Ass Elect Ind Improvements in or relating to Vacuum Electric Switches.
DE2612129A1 (en) * 1975-03-22 1976-10-07 Gemvac Kk VACUUM CIRCUIT BREAKER
GB2035697A (en) * 1978-11-17 1980-06-18 Westinghouse Electric Corp Low voltage vacuum switches
FR2450794A1 (en) * 1979-03-05 1980-10-03 Hazemeijer Bv METHOD FOR MANUFACTURING A JOINT BETWEEN A CERAMIC PIECE AND A STAINLESS STEEL PIECE, JOINT, VACUUM SWITCH AND SPLITER THEREFOR
EP0084238A1 (en) * 1981-12-19 1983-07-27 Kabushiki Kaisha Meidensha Vacuum interrupter

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5661281A (en) * 1993-06-18 1997-08-26 Siemens Aktiengesellschaft Vacuum-type interrupter having an annular insulator
DE4422316B4 (en) * 1993-06-18 2005-06-02 Siemens Ag Vacuum interrupter with annular insulator
DE9319945U1 (en) * 1993-12-21 1995-04-20 Siemens Ag Solder ring for vacuum electronic components
DE4401356A1 (en) * 1994-01-14 1995-07-20 Siemens Ag Vacuum switching tube with special current terminal
DE19713478C1 (en) * 1997-03-18 1998-04-09 Siemens Ag Vacuum switch tube e.g. for low-voltage switching
WO1998042000A1 (en) * 1997-03-18 1998-09-24 Siemens Aktiengesellschaft Vacuum switching tubes with a metal housing part positioned between two insulators
DE102018220928A1 (en) 2018-12-04 2020-06-04 Siemens Aktiengesellschaft Improvement of the surface properties of contact materials
WO2020114687A1 (en) 2018-12-04 2020-06-11 Siemens Aktiengesellschaft Improvement of the surface properties of contact materials

Also Published As

Publication number Publication date
EP0254089B1 (en) 1992-01-08
DE8618632U1 (en) 1988-12-22
CA1296038C (en) 1992-02-18
US4746777A (en) 1988-05-24
JPS6329423A (en) 1988-02-08
JPH0555965B2 (en) 1993-08-18
DE3623457A1 (en) 1988-01-14
DE3775844D1 (en) 1992-02-20

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