EP1292959B1 - Vacuum interrupter with two contact systems - Google Patents

Vacuum interrupter with two contact systems Download PDF

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Publication number
EP1292959B1
EP1292959B1 EP01944973A EP01944973A EP1292959B1 EP 1292959 B1 EP1292959 B1 EP 1292959B1 EP 01944973 A EP01944973 A EP 01944973A EP 01944973 A EP01944973 A EP 01944973A EP 1292959 B1 EP1292959 B1 EP 1292959B1
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EP
European Patent Office
Prior art keywords
contact
vacuum interrupter
contact system
piece
support
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EP01944973A
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German (de)
French (fr)
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EP1292959A1 (en
Inventor
Roman Renz
Norbert Steinemer
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Siemens AG
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Siemens AG
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
    • H01H1/0206—Contacts characterised by the material thereof specially adapted for vacuum switches containing as major components Cu and Cr
    • 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
    • H01H33/666—Operating arrangements
    • H01H2033/6668—Operating arrangements with a plurality of interruptible circuit paths in single vacuum chamber
    • 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
    • H01H33/6606—Terminal arrangements
    • 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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6642—Contacts; Arc-extinguishing means, e.g. arcing rings having cup-shaped contacts, the cylindrical wall of which being provided with inclined slits to form a coil

Definitions

  • the invention is in the field of electrical switches and is to be applied in the structural design of a vacuum interrupter, in which for the performance of the functions "switching", “separating” and “grounding” the housing contains three contacts and has a ground terminal serving as a metal Area of the housing is formed.
  • the metal part of the housing consists of a cylinder, are used in the end-hung annular disk-shaped insulators. Both insulators are axially penetrated by in each case one power supply bolt of a first, arranged concentrically to the axis of the housing contact system, wherein the power supply pin of the fixed contact of the first contact system is soldered vacuum-tight with the one insulator.
  • the power supply pin of the movable contact of the first contact system is movably passed through a bore of the other insulator.
  • the rear part of the movable contact of the first contact system also forms the movable contact of a coaxial with the first contact system arranged second contact system whose fixed contact is annular disc-shaped and connected in the edge region with the metal part of the housing. At one end of this housing, a ground contact is arranged.
  • the first contact system is still associated with a shield, which consists of a cylinder which is supported via an annular insulating piece on the metal cylinder ( DE 20 37 234 A1 ).
  • a load-break switch in which at least two pairs of contacts are arranged in a common vacuum vessel and in which the contact pairs are separated by special shields plasma-physically.
  • two coaxial shielding cylinders may be used per contact pair, the cylinder walls of which overlap in the axial direction.
  • the shielding cylinders are electrically conductively connected to one of the contacts of the associated contact pair.
  • Each contact pair may continue to be assigned a ground contact to which the movable switching contact is switchable.
  • the movable switching contact can be fixed in three switching positions ( DE 33 04 803 A1 ).
  • the invention has for its object to provide a practical needs such as simple construction and cost-effective production sufficient structural design.
  • the first contact system comprises radial or axial magnetic field contact pieces and the second contact system each have annular disk-shaped contact pieces arranged by means of a contact carrier, wherein the contact carrier of one annular disk-shaped contact piece is located on the bottom side of the movable radial contact piece.
  • the contact carrier of the other ring-shaped contact piece forms the ground terminal;
  • the two insulators are tubular and connected to each other with the interposition of the ground terminal frontally, wherein the one insulator, the first contact system and essentially also the movable contact of the second contact system surrounds;
  • the shield for the purpose of plasma physical separation of the first contact system of the second contact system is formed as a labyrinthine shielding system, which consists of a first contact system surrounding tube which forms a cap with the disposed on the movable contact contact carrier of the annular disk-shaped contact.
  • the vacuum interrupter can be used for the construction and manufacture of the interrupter mainly conventional components and conventional manufacturing measures, so that the vacuum interrupter can be produced economically.
  • the use of magnetic contact pieces and the proposed design of the shield thereby ensure the electrical performance of the interrupter.
  • tubular insulators in particular ceramic insulators, is customary for vacuum interrupters, as is the design of the contact pieces as radial or axial magnetic field contacts ( EP 0 155 376 C1, DE 25 27 319 A1 ).
  • the second contact system only has to be designed for the necessary switch-on resistance, a simple plate or annular disk geometry is sufficient for the corresponding contact pieces; as a contact-resistant contact material is preferably a material based on copper / chromium used.
  • the contact carrier of the movable contact piece may be formed integrally with the tube surrounding the first contact system.
  • the contact carrier - with appropriate shaping - at the same time forms the movable, ring-shaped contact piece.
  • the distance of the tube from the insulator surrounding the contact system be less than the distance of the tube from the first contact system.
  • FIG. 1 shows a vacuum interrupter, which has a housing 10, a first contact system 22, a second contact system 25 and a shield 30 substantially.
  • the housing 10 is made of insulating and metal parts.
  • Two tubular ceramic insulators 11 and 12 are arranged coaxially with each other and connected to each other with the interposition of a metal part 13.
  • the metal part 13 forms the ground contact of the vacuum interrupter and is designed for this purpose as a concentric with the axis A of the housing arranged short, thick-walled pipe section 14 with radially extending connecting flange 15.
  • the pipe section 14 forms an annular contact carrier for a ring-shaped contact piece 16.
  • the housing 10 furthermore has a metal upper cover plate 17 and a metal lower cover plate 18 which are soldered to the ceramic insulator 11 and the ceramic insulator 12, respectively, by means of cutting soldering.
  • a metal upper cover plate 17 and a metal lower cover plate 18 which are soldered to the ceramic insulator 11 and the ceramic insulator 12, respectively, by means of cutting soldering.
  • To the lower cover plate 18 is still one end of a bellows 19 soldered, which is soldered at its other end to a power supply pin 20.
  • a flat, pot-like, thick-walled contact carrier 26 is arranged on the back of the movable contact 21, which is an annular disc-shaped contact plate 27th wearing.
  • the arrangement of the contact carrier 26 makes it possible to assign a shield to the first contact system, which consists of a tube piece 31 connected to the contact carrier 26. As a result, a shield system is formed which covers the first contact system 22 in the manner of a cap.
  • the distance S1 of the pipe section 31 from the ceramic contactor 11 surrounding the first contact system 22 and the second contact system 25 is greater than the distance S2 of the pipe 31 from the contact system 22, thereby forming a labyrinth-like shield system is that separates the first contact system 22 from the second contact system 25 plasma-physically.
  • the contacts 21 and 23 are formed as axial magnetic field contacts; the contacts of the second contact system are formed as simple annular discs 16 and 27 and consist of a Cu-Cr material.
  • FIG. 2 shows a detail of a vacuum interrupter, the opposite FIG. 1 with respect to the configuration of the second contact system and the shield is varied.
  • the fixed, the ground terminal 34 forming contact of the second contact system is formed as provided with a connection flange 35 annular disc on which an annular disc-shaped contact piece 36 is placed.
  • a cap surrounding the first contact system 37 is arranged, the bottom portion 38 is formed so that an annular shoulder 39 is formed.
  • This shoulder may itself form the movable contact of the second contact system or be covered in a similar manner as the grounding contact 34 with a circular contact piece.
  • the bottom portion 38 of the cap 37 at the same time forms the contact carrier for the movable contact of the second contact system.
  • the side wall 40 of the cap is cylindrical and forms, together with the bottom portion 38, the shield.

Abstract

The invention relates to a novel vacuum interrupter. The aim of the invention is for said interrupter to perform the functions switching , disconnection and earthing and to be economically producible. Said aim is achieved by means of a first contact system (22) produced with radial- or axial-magnetic field contacts (21, 23), the movable contact of which (21) is connected to the movable contact (26, 27) of a second contact system (25), comprising annular discs (16, 27). The stationary contact (13) of the second contact system forms an annular part of the housing (10) to which two tubular insulators (11, 12) are connected. One (11) of the insulators encloses both contact systems (22, 25) and is protected by a screen (31) fixed to the movable contact piece (21, 26), which separates the plasma physics of the both contact systems.

Description

Die Erfindung liegt auf dem Gebiet der elektrischen Schalter und ist bei der konstruktiven Ausgestaltung einer Vakuumschaltröhre anzuwenden, bei der zur Ausübung der Funktionen "Schalten", "Trennen" und "Erden" das Gehäuse drei Kontakte enthält und einen Erdungsanschluss aufweist, der als ein metallener Bereich des Gehäuses ausgebildet ist.The invention is in the field of electrical switches and is to be applied in the structural design of a vacuum interrupter, in which for the performance of the functions "switching", "separating" and "grounding" the housing contains three contacts and has a ground terminal serving as a metal Area of the housing is formed.

Bei einer bekannten Vakuumschaltröhre dieser Art besteht der metallene Teil des Gehäuses aus einem Zylinder, in den stirnendig ringscheibenförmige Isolatoren eingesetzt sind. Beide Isolatoren werden von jeweils einem Stromzuführungsbolzen eines ersten, konzentrisch zur Achse des Gehäuses angeordneten Kontaktsystems axial durchdrungen, wobei der Stromzuführungsbolzen des feststehenden Kontaktes des ersten Kontaktsystems mit dem einen Isolator vakuumdicht verlötet ist. Der Stromzuführungsbolzen des bewegbaren Kontaktes des ersten Kontaktsystems ist bewegbar durch eine Bohrung des anderen Isolators hindurchgeführt. Der rückwärtige Teil des bewegbaren Kontaktes des ersten Kontaktsystem bildet zugleich den bewegbaren Kontakt eines koaxial zum ersten Kontaktsystem angeordneten zweiten Kontaktsystems, dessen feststehender Kontakt ringscheibenförmig ausgebildet und im Randbereich mit dem metallenen Teil des Gehäuses verbunden ist. An dem einen Ende dieses Gehäuses ist ein Erdungskontakt angeordnet. - Dem ersten Kontaktsystem ist noch eine Abschirmung zugeordnet, die aus einem Zylinder besteht, welcher sich über ein ringförmiges Isolierstück am metallenen Zylinder abstützt ( DE 20 37 234 A1 ).In a known vacuum interrupter of this type, the metal part of the housing consists of a cylinder, are used in the end-hung annular disk-shaped insulators. Both insulators are axially penetrated by in each case one power supply bolt of a first, arranged concentrically to the axis of the housing contact system, wherein the power supply pin of the fixed contact of the first contact system is soldered vacuum-tight with the one insulator. The power supply pin of the movable contact of the first contact system is movably passed through a bore of the other insulator. The rear part of the movable contact of the first contact system also forms the movable contact of a coaxial with the first contact system arranged second contact system whose fixed contact is annular disc-shaped and connected in the edge region with the metal part of the housing. At one end of this housing, a ground contact is arranged. - The first contact system is still associated with a shield, which consists of a cylinder which is supported via an annular insulating piece on the metal cylinder ( DE 20 37 234 A1 ).

Für Mittelspannungsschaltanlagen ist weiterhin ein Lasttrennschalter bekannt, bei dem wenigstens zwei Kontaktpaare in einem gemeinsamen Vakuumgefäß angeordnet sind und bei dem die Kontaktpaare durch spezielle Abschirmungen plasmaphysikalisch voneinander getrennt sind. Hierzu können je Kontaktpaar zwei koaxiale Abschirmzylinder eingesetzt sein, deren Zylinderwände sich in axialer Richtung überlappen. Die Abschirmzylinder sind dabei mit je einem der Kontakte des zugehörigen Kontaktpaares elektrisch leitend verbunden. - Jedem Kontaktpaar kann weiterhin ein Masse-Kontakt zugeordnet sein, auf den der bewegliche Schaltkontakt schaltbar ist. Hierbei ist der beweg-liche Schaltkontakt in drei Schaltstellungen fixierbar ( DE 33 04 803 A1 ).For medium-voltage switchgear a load-break switch is also known, in which at least two pairs of contacts are arranged in a common vacuum vessel and in which the contact pairs are separated by special shields plasma-physically. For this purpose, two coaxial shielding cylinders may be used per contact pair, the cylinder walls of which overlap in the axial direction. The shielding cylinders are electrically conductively connected to one of the contacts of the associated contact pair. - Each contact pair may continue to be assigned a ground contact to which the movable switching contact is switchable. In this case, the movable switching contact can be fixed in three switching positions ( DE 33 04 803 A1 ).

Ausgehend von einer Vakuumschaltröhre mit den Merkmalen des Oberbegriffes des Patentanspruches 1 ( DE 20 37 234 ) liegt der Erfindung die Aufgabe zugrunde, eine den praktischen Bedürfnissen wie einfacher Aufbau und kostengünstige Herstellung genügende konstruktive Ausgestaltung zu schaffen.Starting from a vacuum interrupter with the features of the preamble of claim 1 ( DE 20 37 234 ), the invention has for its object to provide a practical needs such as simple construction and cost-effective production sufficient structural design.

Zur Lösung dieser Aufgabe ist gemäß der Erfindung zunächst vorgesehen, dass das erste Kontaktsystem Radial- oder Axial-Magnetfeld-Kontaktstücke und das zweite Kontaktsystem jeweils mittels eines Kontaktträgers angeordnete ringscheibenförmige Kontaktstücke aufweist, wobei der Kontaktträger des einen ringscheibenförmigen Kontaktstückes an der Bodenseite des bewegbaren Radial- oder Axial-Magnetfeld-Kontaktes angeordnet ist und der Kontaktträger des anderen ringscheibenförmigen Kontaktstückes den Erdanschluss bildet; weiterhin sind die beiden Isolatoren rohrförmig ausgebildet und unter Zwischenschaltung des Erdungsanschlusses stirnseitig miteinander verbunden, wobei der eine Isolator das erste Kontaktsystem und im wesentlichen auch den bewegbaren Kontakt des zweiten Kontaktsystems umgibt; schließlich ist die Abschirmung zwecks plasmaphysikalischer Trennung des ersten Kontaktsystems von dem zweiten Kontaktsystem als labyrinthartiges Schirmsystem ausgebildet, welches aus einem das erste Kontaktsystem umgebenden Rohr besteht, das mit dem an dem beweglichen Kontakt angeordneten Kontaktträger des ringscheibenförmigen Kontaktes eine Kappe bildet.To achieve this object, it is initially provided according to the invention that the first contact system comprises radial or axial magnetic field contact pieces and the second contact system each have annular disk-shaped contact pieces arranged by means of a contact carrier, wherein the contact carrier of one annular disk-shaped contact piece is located on the bottom side of the movable radial contact piece. or axial magnetic field contact is arranged and the contact carrier of the other ring-shaped contact piece forms the ground terminal; Furthermore, the two insulators are tubular and connected to each other with the interposition of the ground terminal frontally, wherein the one insulator, the first contact system and essentially also the movable contact of the second contact system surrounds; Finally, the shield for the purpose of plasma physical separation of the first contact system of the second contact system is formed as a labyrinthine shielding system, which consists of a first contact system surrounding tube which forms a cap with the disposed on the movable contact contact carrier of the annular disk-shaped contact.

Bei einer derartigen Ausgestaltung der Vakuumschaltröhre können für den Aufbau und die Herstellung der Schaltröhre überwiegend übliche Bauteile sowie übliche Fertigungsmaßnahmen eingesetzt werden, so dass sich die Vakuumschaltröhre wirtschaftlich herstellen lässt. Die Verwendung von Magnetfeld-Kontaktstücken und die vorgesehene Ausgestaltung der Abschirmung gewährleisten dabei die elektrische Leistungsfähigkeit der Schaltröhre.In such an embodiment of the vacuum interrupter can be used for the construction and manufacture of the interrupter mainly conventional components and conventional manufacturing measures, so that the vacuum interrupter can be produced economically. The use of magnetic contact pieces and the proposed design of the shield thereby ensure the electrical performance of the interrupter.

Die Verwendung von rohrförmig ausgebildeten Isolatoren, insbesondere Keramikisolatoren, ist für Vakuumschaltröhren an sich gebräuchlich, ebenso die Ausgestaltung der Kontaktstücke als Radial- oder Axial-Magnetfeld-Kontakte ( EP 0 155 376 C1, DE 25 27 319 A1 ).The use of tubular insulators, in particular ceramic insulators, is customary for vacuum interrupters, as is the design of the contact pieces as radial or axial magnetic field contacts ( EP 0 155 376 C1, DE 25 27 319 A1 ).

Da das zweite Kontaktsystem nur für die notwendige Einschaltfestigkeit ausgelegt sein muss, genügt für die entsprechenden Kontaktstücke eine einfache Platten- oder Ringscheibengeometrie; als einschaltfestes Kontaktmaterial kommt vorzugsweise ein Werkstoff auf der Basis Kupfer/Chrom zur Anwendung. - Gegebenenfalls kann - zur weiteren konstruktiven Vereinfachung - der Kontaktträger des bewegbaren Kontaktstückes einstückig mit dem das erste Kontaktsystem umgebenden Rohr ausgebildet sein. Hierbei besteht auch die Möglichkeit, dass der Kontaktträger - bei entsprechender Formgebung - zugleich das bewegbare, ringscheibenförmige Kontaktstück bildet.Since the second contact system only has to be designed for the necessary switch-on resistance, a simple plate or annular disk geometry is sufficient for the corresponding contact pieces; as a contact-resistant contact material is preferably a material based on copper / chromium used. Optionally, for further structural simplification, the contact carrier of the movable contact piece may be formed integrally with the tube surrounding the first contact system. There is also the possibility that the contact carrier - with appropriate shaping - at the same time forms the movable, ring-shaped contact piece.

Um den labyrinthartigen Charakter der Abschirmung zu betonen, empfiehlt es sich, den Abstand des Rohres von dem das Kontaktsystem umgebenden Isolator kleiner als den Abstand des Rohres von dem ersten Kontaktsystem zu wählen.To emphasize the labyrinthine character of the shield, it is recommended that the distance of the tube from the insulator surrounding the contact system be less than the distance of the tube from the first contact system.

Zwei Ausführungsbeispiele der neuen Vakuumschaltröhre sind in den Figuren 1 und 2 dargestellt. Dabei zeigt

Figur 1
eine Vakuumschaltröhre mit zweistückig ausgebildeter Abschirmung und
Figur 2
eine Vakuumschaltröhre mit einstückig ausgebildeter Abschirmung.
Two embodiments of the new vacuum interrupter are in the FIGS. 1 and 2 shown. It shows
FIG. 1
a vacuum interrupter with two-piece shielding and
FIG. 2
a vacuum interrupter with integrally formed shield.

Figur 1 zeigt eine Vakuumschaltröhre, die im wesentlichen ein Gehäuse 10, ein erstes Kontaktsystem 22, ein zweites Kontaktsystem 25 und eine Abschirmung 30 aufweist. FIG. 1 shows a vacuum interrupter, which has a housing 10, a first contact system 22, a second contact system 25 and a shield 30 substantially.

Das Gehäuse 10 besteht aus Isolier-und Metall-Teilen. Zwei rohrförmige Keramikisolatoren 11 und 12 sind koaxial zueinander angeordnet und unter Zwischenschaltung eines metallenen Teiles 13 miteinander verbunden. Das metallene Teil 13 bildet den Erdungskontakt der Vakuumschaltröhre und ist hierzu als konzentrisch zur Achse A des Gehäuses angeordnetes kurzes, dickwandiges Rohrstück 14 mit radial verlaufendem Anschlussflansch 15 ausgestaltet. Das Rohrstück 14 bildet einen ringförmigen Kontaktträger für ein ringscheibenförmiges Kontaktstück 16. - An den Anschlussflansch 15 sind beidseitig nicht näher bezeichnete ringförmige Winkelstücke angelötet, die als Verbindungsteile zur Verbindung des metallenen Teiles 13 mit den Keramik-Isolatoren 11 und 12 mittels einer Schneidenlötung dienen.The housing 10 is made of insulating and metal parts. Two tubular ceramic insulators 11 and 12 are arranged coaxially with each other and connected to each other with the interposition of a metal part 13. The metal part 13 forms the ground contact of the vacuum interrupter and is designed for this purpose as a concentric with the axis A of the housing arranged short, thick-walled pipe section 14 with radially extending connecting flange 15. The pipe section 14 forms an annular contact carrier for a ring-shaped contact piece 16. On the connection flange 15 unspecified on both sides annular elbows are soldered, which serve as connecting parts for connecting the metal part 13 with the ceramic insulators 11 and 12 by means of a Schneidlötung.

Das Gehäuse 10 weist weiterhin eine metallene obere Deckplatte 17 und eine metallene untere Deckplatte 18 auf, die jeweils mittels einer Schneidenlötung mit dem Keramik-Isolator 11 bzw. dem Keramik-Isolator 12 verlötet sind. An die untere Deckplatte 18 ist noch das eine Ende eines Faltenbalges 19 angelötet, der mit seinem anderen Ende mit einem Stromzuführungsbolzen 20 verlötet ist.The housing 10 furthermore has a metal upper cover plate 17 and a metal lower cover plate 18 which are soldered to the ceramic insulator 11 and the ceramic insulator 12, respectively, by means of cutting soldering. To the lower cover plate 18 is still one end of a bellows 19 soldered, which is soldered at its other end to a power supply pin 20.

Der Stromzuführungsbolzen 20, der bewegbar durch die untere Deckplatte 18 hindurchgeführt ist, trägt an seinem obere Ende das bewegbare Kontaktstück 21 des ersten Kontaktsystems, welches zum Schalten von Strom und Spannung vorgesehen ist. Koaxial zum bewegbaren Kontaktstück 21 ist ein feststehendes Kontaktstück 23 angeordnet, das mittels eines Stromzuführungsbolzens 24 an der oberen Deckplatte 17 befestigt ist.The power supply pin 20, which is movably passed through the lower cover plate 18, carries at its upper end the movable contact piece 21 of the first contact system, which is provided for switching current and voltage. Coaxial with the movable contact piece 21, a fixed contact piece 23 is arranged, which is fastened by means of a power supply pin 24 to the upper cover plate 17.

Der Stromzuführungsbolzen 20, der durch das den Erdungskontakt bildende metallene Teil 13 hindurchgeführt ist, trägt auch den bewegbaren Kontakt des zweiten Kontaktsystems 25. Hierzu ist auf der Rückseite des bewegbaren Kontaktes 21 ein flacher, topfartiger, dickwandiger Kontaktträger 26 angeordnet, der eine ringscheibenförmige Kontaktscheibe 27 trägt. Die Anordnung des Kontaktträgers 26 ermöglicht es, dem ersten Kontaktsystem eine Abschirmung zuzuordnen, die aus einem mit dem Kontaktträger 26 verbundenen Rohrstück 31 besteht. Dadurch wird ein Schirmsystem gebildet, das kappenartig das erste Kontaktsystem 22 überdeckt. Dabei ist der Abstand S1 des Rohrstückes 31 von dem das erste Kontaktsystem 22 und das zweite Kontaktsystem 25 umgebenden Keramik-Isolator 11 größer als der Abstand S2 des Rohres 31 von dem Kontaktsystem 22 gewählt, wodurch ein labyrinthartiges Schirmsystem gebildet ist, welches das erste Kontaktsystem 22 vom zweiten Kontaktsystem 25 plasmaphysikalisch trennt.The power supply pin 20, which is passed through the grounding contact forming metal part 13, also carries the movable contact of the second contact system 25. For this purpose, a flat, pot-like, thick-walled contact carrier 26 is arranged on the back of the movable contact 21, which is an annular disc-shaped contact plate 27th wearing. The arrangement of the contact carrier 26 makes it possible to assign a shield to the first contact system, which consists of a tube piece 31 connected to the contact carrier 26. As a result, a shield system is formed which covers the first contact system 22 in the manner of a cap. In this case, the distance S1 of the pipe section 31 from the ceramic contactor 11 surrounding the first contact system 22 and the second contact system 25 is greater than the distance S2 of the pipe 31 from the contact system 22, thereby forming a labyrinth-like shield system is that separates the first contact system 22 from the second contact system 25 plasma-physically.

Bei dem ersten Kontaktsystem 22 sind die Kontakte 21 und 23 als Axial-Magnetfeld-Kontakte ausgebildet; die Kontakte des zweiten Kontaktsystems sind als einfache Ringscheiben 16 und 27 ausgebildet und bestehen aus einem Cu-Cr-Werkstoff.In the first contact system 22, the contacts 21 and 23 are formed as axial magnetic field contacts; the contacts of the second contact system are formed as simple annular discs 16 and 27 and consist of a Cu-Cr material.

Figur 2 zeigt ausschnittsweise eine Vakuumschaltröhre, die gegenüber Figur 1 bezüglich der Ausgestaltung des zweiten Kontaktsystems und der Abschirmung variiert ist. Dabei ist der feststehende, den Erdungsanschluss 34 bildende Kontakt des zweiten Kontaktsystems als mit einem Anschlussflansch 35 versehene Ringscheibe ausgebildet, auf die ein ringscheibenförmiges Kontaktstück 36 aufgesetzt ist. - An der Rückseite des bewegbaren Kontaktstückes 21 des ersten Kontaktsystems ist eine das erste Kontaktsystem umgebende Kappe 37 angeordnet, deren Bodenbereich 38 so geformt ist, dass eine ringförmige Schulter 39 gebildet ist. Diese Schulter kann selbst den bewegbaren Kontakt des zweiten Kontaktsystems bilden oder in ähnlicher Weise wie der Erdungskontakt 34 mit einem kreisringförmigen Kontaktstück belegt sein. - Bei diesem Ausführungsbeispiel bildet der Bodenbereich 38 der Kappe 37 zugleich den Kontaktträger für den bewegbaren Kontakt des zweiten Kontaktsystems. Die Seitenwand 40 der Kappe ist zylindrisch ausgebildet und bildet zusammen mit dem Bodenbereich 38 die Abschirmung. FIG. 2 shows a detail of a vacuum interrupter, the opposite FIG. 1 with respect to the configuration of the second contact system and the shield is varied. In this case, the fixed, the ground terminal 34 forming contact of the second contact system is formed as provided with a connection flange 35 annular disc on which an annular disc-shaped contact piece 36 is placed. - At the back of the movable contact piece 21 of the first contact system, a cap surrounding the first contact system 37 is arranged, the bottom portion 38 is formed so that an annular shoulder 39 is formed. This shoulder may itself form the movable contact of the second contact system or be covered in a similar manner as the grounding contact 34 with a circular contact piece. - In this embodiment, the bottom portion 38 of the cap 37 at the same time forms the contact carrier for the movable contact of the second contact system. The side wall 40 of the cap is cylindrical and forms, together with the bottom portion 38, the shield.

Claims (8)

  1. Vacuum interrupter having three contacts, which are arranged in a cylindrical housing, for carrying out the functions of "switching", "disconnection" and "grounding",
    with the housing (10) having a metallic area (13) in the form of a grounding connection and having two areas composed of insulators (11, 12),
    in which a moving contact (21) and a first stationary contact (23) form a first contact system (22), and the moving contact (21) and a second stationary contact (16), which is connected to the grounding contact (14, 15), form a second contact system (25) ,
    in which the two contact systems are arranged coaxially with respect to one another and concentrically with respect to the axis (A) of the housing (10), and
    in which the first contact system is surrounded by a shield,
    characterized
    in that the first contact system has radial or axial magnetic field contact pieces (21, 22), and the second contact system has contact pieces (16, 27) which are each arranged by means of a contact support (14, 26) and are in the form of annular disks,
    with the contact support (26) of one of the annular contact pieces (27) being arranged on the rear face of the moving radial or axial magnetic field contact (21), and the contact support (14) of the other contact piece (16), which is the form of an annular disk, forming the grounding connection,
    in that the two insulators (11, 12) are tubular and are connected to one another at the ends with the interposition of the grounding connection (13),
    with one of the insulators (11) surrounding the first (22) contact system, and essentially also the moving contact (26, 27) of the second contact system (25),
    and in that the shield is in the form of a labyrinth shielding system (30) in order to physically isolate plasma in the first contact system (22) from plasma in the second contact system (25), which shielding system (30) comprises a tube (31) which surrounds the first contact system (22), and, together with the contact support (26), which is arranged on the moving contact, of the contact piece (27) which is in the form of an annular disk, forms a cap.
  2. Vacuum interrupter according to Claim 1,
    characterized
    in that the contact support of the moving contact piece (16) which is in the form of an annular disk is in the form of a flat pot (26) with thick walls.
  3. Vacuum interrupter according to Claim 1,
    characterized
    in that the contact support of the moving contact piece which is in the form of an annular disk is formed integrally with the tube (31) which surrounds the first contact system (22).
  4. Vacuum interrupter according to Claim 3,
    characterized
    in that the contact support at the same time forms the contact piece which is in the form of an annular disk.
  5. Vacuum interrupter according to one of Claims 1 to 4,
    characterized
    in that the distance (S1) between the tube (31) and the insulator (11) is less than the distance (S2) between the tube (31) and the first (22) contact system.
  6. Vacuum interrupter according to one of Claims 1 to 5,
    characterized
    in that the contact support (14), which forms the grounding connection (13), of the second contact system is in the form of a piece of tubing which has thick walls and has a radially running flange (15).
  7. Vacuum interrupter according to one of Claims 1 to 5,
    characterized
    in that the contact support which forms the grounding connection (34) is in the form of an annular disk.
  8. Vacuum interrupter according to one of Claims 1 to 7,
    characterized
    in that the contact pieces (16, 27), which are in the form of annular disks, of the second contact system (25) are composed of a copper-chromium material.
EP01944973A 2000-06-23 2001-06-06 Vacuum interrupter with two contact systems Expired - Lifetime EP1292959B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10030670 2000-06-23
DE10030670A DE10030670C2 (en) 2000-06-23 2000-06-23 Vacuum interrupter with two contact systems
PCT/DE2001/002125 WO2001099132A1 (en) 2000-06-23 2001-06-06 Vacuum interrupter with two contact systems

Publications (2)

Publication Number Publication Date
EP1292959A1 EP1292959A1 (en) 2003-03-19
EP1292959B1 true EP1292959B1 (en) 2008-12-31

Family

ID=7646579

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01944973A Expired - Lifetime EP1292959B1 (en) 2000-06-23 2001-06-06 Vacuum interrupter with two contact systems

Country Status (6)

Country Link
US (1) US6720515B2 (en)
EP (1) EP1292959B1 (en)
JP (1) JP2003536221A (en)
CN (1) CN1193395C (en)
DE (2) DE10030670C2 (en)
WO (1) WO2001099132A1 (en)

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Also Published As

Publication number Publication date
DE10030670C2 (en) 2002-06-13
DE50114619D1 (en) 2009-02-12
WO2001099132A1 (en) 2001-12-27
US20030094438A1 (en) 2003-05-22
JP2003536221A (en) 2003-12-02
CN1193395C (en) 2005-03-16
EP1292959A1 (en) 2003-03-19
DE10030670A1 (en) 2002-01-10
CN1416586A (en) 2003-05-07
US6720515B2 (en) 2004-04-13

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