EP0149061A1 - Vacuum switch for low tension, particularly a low tension protector - Google Patents

Vacuum switch for low tension, particularly a low tension protector Download PDF

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Publication number
EP0149061A1
EP0149061A1 EP84114144A EP84114144A EP0149061A1 EP 0149061 A1 EP0149061 A1 EP 0149061A1 EP 84114144 A EP84114144 A EP 84114144A EP 84114144 A EP84114144 A EP 84114144A EP 0149061 A1 EP0149061 A1 EP 0149061A1
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EP
European Patent Office
Prior art keywords
vacuum
vacuum switch
shielding cylinder
insulator
switch according
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Granted
Application number
EP84114144A
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German (de)
French (fr)
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EP0149061B1 (en
Inventor
Wilfried Kuhl
Edwin Gemmel
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Siemens AG
Siemens Corp
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Siemens AG
Siemens Corp
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66Vacuum switches
    • H01H33/662Housings or protective screens
    • H01H33/66261Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations

Definitions

  • the invention relates to a vacuum switch for the low-voltage range, in particular a low-voltage contactor, consisting of a vacuum switching tube with a switching chamber and a first contact piece fixed therein, and a power supply bolt that is movable relative thereto and a second contact piece, the vacuum switching tube having an insulator section that is at least partially shielded on the vacuum side is surrounded.
  • a low-voltage contactor consisting of a vacuum switching tube with a switching chamber and a first contact piece fixed therein, and a power supply bolt that is movable relative thereto and a second contact piece, the vacuum switching tube having an insulator section that is at least partially shielded on the vacuum side is surrounded.
  • Each switch contains a high-resistance insulating section, which should not change as far as possible during the entire life of the switch.
  • dust and water vapor and the like can deposit on the insulator on the atmospheric side, while metal vapor from the evaporating contact material can deposit on the vacuum-side surface and thus impair the insulating ability of the insulator.
  • Shields are therefore required on the vacuum side of the insulators to prevent metal vapor condensation; Depending on the applied voltage, such shields can sometimes be structurally complex.
  • DE-AS 19 57 829 describes a low-voltage vacuum switch in which a base plate of the switching tube is designed as an insulator, which is provided on the vacuum side with a lid-shaped, conically extending shield.
  • a vacuum switch is known from DE-AS 26 12 129, in which the insulator forms the entire hollow cylinder as part of the switching chamber and the shield is formed by a concentric ring located therein.
  • the inner ring which is shorter in length than the insulator length, essentially encloses the contact area with rigid and, in contrast, movable contact bolts.
  • Other vacuum switches also have shields made up of several individual parts.
  • the aim is to make the isolator section as short as possible.
  • the switching tube is made of ceramic, for which purpose essentially annular elements can be used.
  • individual metal vapor molecules can still reflect on the iso through several reflections lator, condense there and thus form an electrically conductive coating.
  • the object of the invention is therefore to provide a simple shield in vacuum switches with short insulator distances, which has sufficient effectiveness over the entire life of the switch.
  • the problem is solved according to the invention in that the shield is arranged as a concentric hollow cylinder within the insulator section designed as a ceramic ring, the axial length of which is at least 1.5 times the ceramic ring.
  • the shielding cylinder can preferably have approximately three times the length of the insulator ring.
  • the shielding cylinder is as close as possible to the isolator and associated bellows within the vacuum switching tube arranged, but the outer circumference of the shielding cylinder should be at a sufficient distance from the inner circumference of the insulator ring.
  • a gap between 0.5 and 3 mm is preferably formed between the inside of the insulator and the outside of the shielding cylinder. This gap ensures that, even when taking into account the manufacturing tolerances, no contact can occur and that, on the other hand, the gap length is less than the expected free path lengths of the evaporation particles from the switching path between the contact pieces.
  • a vacuum switch for low-voltage systems with the shielding according to the invention can be constructed comparatively easily, so that production is inexpensive.
  • the figure shows a sectional view of a vacuum switch constructed according to the invention.
  • 1 denotes the entire vacuum switching tube. It consists in particular of a pot-like part 2 as a switching chamber, to which a first power supply bolt 3 with a contact piece 4 lying in the switching chamber 2 is fixedly attached. Opposite, a metallic bellows 6, which can be moved in the axial direction, is attached to a base plate 5 in a vacuum-tight manner Switching chamber 2 is connected via an insulator ring 8. In order to produce the vacuum-tight connection between metal and insulator parts, extension rings 7 made of such material are used, which have thermal expansion properties that they can be vacuum-tightly connected on the one hand to metal and on the other hand to ceramic. In the base plate 5, a contact pin 9 is inserted, which carries a switching piece 10 at its upper end.
  • the hollow cylinder 11 Concentric to the insulator ring 8 with the length s J there is a hollow cylinder 11 in the switching chamber, with which the ceramic is shielded from the switching contacts.
  • the hollow cylinder 11 has a tubular extension at its upper end, ie the end facing the switching contacts in the figure, so that a cap 12 is formed, which enables attachment to the switching chamber 2.
  • the cap 12 is soldered to parts 2 and 7.
  • the shielding cylinder 11 has s compared to the insulator length . for example three times the length. However, it must have at least 1.5 times the length of the insulator ring 8, the upper limit of the length being such that the distance s to the base plate 5 of the switching tube is at least as great as that to be expected during the entire service life of the contact pieces axial burnup is in mm, for example.
  • a gap d As narrow a gap d as possible, which is smaller than the free path lengths of the evaporating particles.
  • the manufacturing tolerances have to be taken into account, so that due to the expected rounding, e.g. in the case of the insulator rings, no electrically conductive connection can arise through the shielding cylinder.
  • a gap width d in the range of 0.5 to 3 mm has proven to be practical and suitable.

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  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Abstract

Die Erfindung bezieht sich auf einen Vakuumschalter für den Niederspannungsbereich insbesondere Niederspannungsschütz, bestehend aus einem Vakuumschaltrohr mit Schaltkammer und einem darin fest angeordneten ersten Kontaktstück sowie einem demgegenüber beweglichen Stromzuführungsbolzen mit zweitem Kontaktstück, wobei das Vakuumschaltrohr eine Isolatorstrecke aufweist, die vakuumseitig zumindest teilweise von einer Abschirmung umgeben ist. Gemäß der Erfindung ist die Abschirmung als konzentrischer Hohlzylinder (11) innerhalb der als Keramikring (8) ausgebildeten Isolatorstrecke angeordnet, wobei die axiale Länge des Abschirmzylinders (11) wenigstens das 1,5-fache des Keramikringes (8) beträgt. Es läßt sich so kostengünstig ein Vakuumschalter mit kurzer Isolatorstrecke für hohe Schaltspielzahlen aufbauen.

Figure imgaf001
The invention relates to a vacuum switch for the low-voltage range, in particular a low-voltage contactor, consisting of a vacuum switching tube with a switching chamber and a first contact piece fixed therein as well as a power supply bolt with a second contact piece that is movable relative thereto, the vacuum switching tube having an isolator path which at least partially surrounds the vacuum side with a shield is. According to the invention, the shield is arranged as a concentric hollow cylinder (11) within the insulator section designed as a ceramic ring (8), the axial length of the shielding cylinder (11) being at least 1.5 times the ceramic ring (8). A vacuum switch with a short isolator section for high number of switching cycles can thus be built cost-effectively.
Figure imgaf001

Description

Die Erfindung bezieht sich auf einen Vakuumschalter für den Niederspannungsbereich, insbesondere Niederspannungsschütz, bestehend aus einem Vakuumschaltrohr mit Schaltkammer und einem darin fest angeordneten ersten Kontaktstück sowie einem demgegenüber beweglichen Stromzuführungsbolzen mit zweitem Kontaktstück, wobei das Vakuumschaltrohr eine Isolatorstrecke aufweist, die vakuumseitig zumindest teilweise von einer Abschirmung umgeben ist.The invention relates to a vacuum switch for the low-voltage range, in particular a low-voltage contactor, consisting of a vacuum switching tube with a switching chamber and a first contact piece fixed therein, and a power supply bolt that is movable relative thereto and a second contact piece, the vacuum switching tube having an insulator section that is at least partially shielded on the vacuum side is surrounded.

Jeder Schalter enthält eine hochohmige Isolierstrecke, die sich während der gesamten Lebensdauer des Schalters nach Möglichkeit nicht verändern darf. Bei Vakuumschaltern kann sich am Isolator auf der atmosphärischen Seite Staub und Wasserdampf und dergleichen, dagegen auf der vakuumseitigen Oberfläche Metalldampf aus dem verdampfenden Kontaktmaterial niederschlagen und somit die Isolierfähigkeit des Isolators beeinträchtigen. Es werden deshalb Abschirmungen auf der Vakuumseite der Isolatoren benötigt, um die Metalldampfkondensation zu verhindern; solche Abschirmungen können je nach angewendeter Spannung teilweise konstruktiv recht aufwendig sein.Each switch contains a high-resistance insulating section, which should not change as far as possible during the entire life of the switch. In vacuum switches, dust and water vapor and the like can deposit on the insulator on the atmospheric side, while metal vapor from the evaporating contact material can deposit on the vacuum-side surface and thus impair the insulating ability of the insulator. Shields are therefore required on the vacuum side of the insulators to prevent metal vapor condensation; Depending on the applied voltage, such shields can sometimes be structurally complex.

Bei Niederspannungsschaltern werden wegen der niedrigen Nennspannung nur vergleichsweise kleine Isolierwege für die Potentialtrennung benötigt; in der Praxis werden daher neben koaxialen Isolatoren auch solche Isolatorformen verwendet, die eine radiale Isolierstrecke aufweisen. Beispielsweise wird in der DE-AS 19 57 829 ein Niederspannungs-Vakuumschalter beschrieben, bei dem eine Grundplatte des Schaltrohres als Isolator ausgebildet ist, welche vakuumseitig mit einer deckelförmigen, konisch verlaufenden Abschirmung versehen ist. Weiterhin ist aus der DE-AS 26 12 129 ein Vakuumschalter bekannt, bei dem der Isolator als Teil der Schaltkammer den gesamten Hohlzylinder bildet und die Abschirmung durch einen darin liegenden konzentrischen Ring gebildet wird. Durch den in seiner Länge kleiner als die Isolatorlänge realisierten Innenring wird im wesentlichen der Kontaktbereich mit starrem und demgegenüber beweglichen Kontaktbolzen umschlossen. Weitere Vakuumschalter weisen auch aus mehreren Einzelteilen aufgebaute Abschirmungen auf.Due to the low nominal voltage, only comparatively small insulation paths are used for low-voltage switches the isolation is required; In practice, therefore, in addition to coaxial isolators, isolator shapes are also used that have a radial isolating section. For example, DE-AS 19 57 829 describes a low-voltage vacuum switch in which a base plate of the switching tube is designed as an insulator, which is provided on the vacuum side with a lid-shaped, conically extending shield. Furthermore, a vacuum switch is known from DE-AS 26 12 129, in which the insulator forms the entire hollow cylinder as part of the switching chamber and the shield is formed by a concentric ring located therein. The inner ring, which is shorter in length than the insulator length, essentially encloses the contact area with rigid and, in contrast, movable contact bolts. Other vacuum switches also have shields made up of several individual parts.

Aus Kostengründen wird angestrebt, die Isolatorstrecke möglichst kurz auszubilden. In Abweichung zum beschriebenen Stand der Technik wird dazu nur ein Teilbereich des Schaltrohres als Keramik ausgebildet, wozu sich im wesentlichen ringförmige Elemente verwenden lassen. Wenn auch kurze Isolatoren elektrisch für den Niederspannungsbereich ausreichen, so sind trotzdem bestimmte Anforderungen bezüglich der Abschirmungen zu erfüllen. Dabei ist zu berücksichtigen, daß insbesondere bei Anwendung von SChaltröhren als Schütz für den Niederspannungsbereich besonders hohe Schaltzahlen von beispielsweise einigen Millionen Schaltspielen gefordert werden. Dabei können bei den bisher üblichen Abschirmungen im Laufender Zeit immer noch einzelne Metalldampf-Moleküle durch mehrere Reflexionen zum Isolator gelangen, dort kondensieren und somit einen elektrisch leitenden Belag bilden.For cost reasons, the aim is to make the isolator section as short as possible. In a departure from the prior art described, only a portion of the switching tube is made of ceramic, for which purpose essentially annular elements can be used. Even if short electrical isolators are sufficient for the low-voltage range, certain shielding requirements still have to be met. It should be taken into account that especially when using SC stop tubes as contactors for the low-voltage range, particularly high switching numbers of, for example, a few million switching cycles are required. In the case of the shields which have been customary to date, individual metal vapor molecules can still reflect on the iso through several reflections lator, condense there and thus form an electrically conductive coating.

Aufgabe der Erfindung ist es daher, bei Vakuumschaltern mit kurzen Isolatorstrecken eine einfache Abschirmung zu schaffen, die über die gesamte Lebensdauer des Schalters eine hinreichende Wirksamkeit hat.The object of the invention is therefore to provide a simple shield in vacuum switches with short insulator distances, which has sufficient effectiveness over the entire life of the switch.

Die.Äufgabe ist erfindungsgemäß dadurch gelöst, daß die Abschirmung als konzentrischer Hohlzylinder innerhalb der als Keramikring ausgebildeten Isolatorstrecke angeordnet ist, dessen axiale Länge wenigstens das 1,5-fache des Keramikringes beträgt.The . The problem is solved according to the invention in that the shield is arranged as a concentric hollow cylinder within the insulator section designed as a ceramic ring, the axial length of which is at least 1.5 times the ceramic ring.

Bei der Erfindung wird also ein anderer Weg als beim Stand der Technik eingeschlagen. Es kann also ein für die Niederspannungsanwendung vergleichsweise kurzer Isolator verwendet werden, wobei durch die axiale Länge der Abschirmung sichergestellt ist, daß innerhalb der gesamten Lebensdauer des Schalters die Keramik nicht bedampft und damit das Schaltvermögen nicht beeinträchtigt wird. Die Länge des Abschirmhohlzylinders ist dabei vorzugsweise so bemessen, daß der Abstand zur Grundplatte des Schaltrohres bzw. zum elektrischen Gegenpotential wenigstens so groß ist, wie der während der gesamten Lebensdauer der Kontaktstücke zu erwartende Abbrand beträgt, der eine axiale Längenverkürzung der Schaltrohre bewirkt; vorzugsweise kann der Abschirmzylinder etwa die dreifache Länge des Isolatorringes haben.In the invention, therefore, a different path is taken than in the prior art. It is therefore possible to use an insulator which is comparatively short for the low-voltage application, the axial length of the shield ensuring that the ceramic is not vaporized over the entire life of the switch and thus the switching capacity is not impaired. The length of the hollow shielding cylinder is preferably such that the distance to the base plate of the switching tube or to the electrical counter potential is at least as large as the burn-off to be expected during the entire service life of the contact pieces, which causes an axial length reduction of the switching tubes; the shielding cylinder can preferably have approximately three times the length of the insulator ring.

Der Abschirmzylinder ist innerhalb des Vakuumschaltrohres möglichst nah am Isolator und zugehörigem Federbalg angeordnet, wobei aber der äußere Umfang des Abschirmzylinders einen ausreichenden Abstand vom inneren Umfang des Isolatorringes aufweisen soll. Vorzugsweise wird zwischen Innenseite des Isolators und Außenseite des Abschirmzylinders ein Spalt zwischen 0,5 und 3mm gebildet. Dieser Spalt gewährleistet, daß auch bei Berücksichtigung der Fertigungstoleranzen kein Berührungsschluß entstehen kann und daß andererseits die Spaltlänge geringer als die zu erwartenden freien Wegelängen der Verdampfungsteilchen aus der Schaltstrecke zwischen den Kontaktstücken ist.The shielding cylinder is as close as possible to the isolator and associated bellows within the vacuum switching tube arranged, but the outer circumference of the shielding cylinder should be at a sufficient distance from the inner circumference of the insulator ring. A gap between 0.5 and 3 mm is preferably formed between the inside of the insulator and the outside of the shielding cylinder. This gap ensures that, even when taking into account the manufacturing tolerances, no contact can occur and that, on the other hand, the gap length is less than the expected free path lengths of the evaporation particles from the switching path between the contact pieces.

Insgesamt läßt sich ein Vakuumschalter für Niederspannungsanlagen mit der erfindungsgemäßen Abschirmung vergleichsweise einfach aufbauen, so daß die Herstellung kostengünstig ist.Overall, a vacuum switch for low-voltage systems with the shielding according to the invention can be constructed comparatively easily, so that production is inexpensive.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Figurenbeschreibung eines Ausführungsbeispiels anhand der Zeichnung in Verbindung mit den Ansprüchen.Further details and advantages of the invention result from the following description of the figures of an exemplary embodiment with reference to the drawing in conjunction with the claims.

Die Figur zeigt in Schnittdarstellung einen gemäß der Erfindung aufgebauten Vakuumschalter.The figure shows a sectional view of a vacuum switch constructed according to the invention.

In der Figur bezeichnet 1 das gesamte Vakuumschaltrohr. Es besteht im einzelnen aus einem topfartigen Teil 2 als Schaltkammer, an dem ein erster Stromzuführungsbolzen 3 mit in der Schaltkammer 2 liegenden Kontaktstück 4 fest angebracht ist. Gegenüberliegend ist an einer Grundplatte 5 ein in axialer Richtung bewegbarer metallischer Federbalg 6 vakuumdicht angebracht, welcher mit der Schaltkammer 2 über einen Isolatorring 8 verbunden ist. Zur Herstellung der vakuumdichten Verbindung zwischen Metall- und Isolatorteilen werden dabei jeweils Ansatzringe 7 aus solchem Werkstoff verwendet, welche thermische Ausdehnungseigenschaften haben, daß sie sich einerseits mit Metall und andererseits mit Keramik vakuumdicht verbinden lassen. In der Grundplatte 5 ist ein Kontaktbolzen 9 eingefügt, der an seinem oberen Ende ein Schaltstück 10 trägt.In the figure, 1 denotes the entire vacuum switching tube. It consists in particular of a pot-like part 2 as a switching chamber, to which a first power supply bolt 3 with a contact piece 4 lying in the switching chamber 2 is fixedly attached. Opposite, a metallic bellows 6, which can be moved in the axial direction, is attached to a base plate 5 in a vacuum-tight manner Switching chamber 2 is connected via an insulator ring 8. In order to produce the vacuum-tight connection between metal and insulator parts, extension rings 7 made of such material are used, which have thermal expansion properties that they can be vacuum-tightly connected on the one hand to metal and on the other hand to ceramic. In the base plate 5, a contact pin 9 is inserted, which carries a switching piece 10 at its upper end.

In der Figur ist der Schalter im geschlossenen Zustand dargestellt. Auf die Ausbildung der Schaltkontakte wird im einzelnen nicht eingegangen.In the figure, the switch is shown in the closed state. The design of the switch contacts is not dealt with in detail.

Konzentrisch zum Isolatorring 8 mit der Länge sJ befindet sich in der Schaltkammer ein Hohlzylinder 11, mit dem die Keramik gegenüber den Schaltkontakten abgeschirmt ist. Dabei weist der Hohlzylinder 11 an seinem oberen, d.h. in der Figur den Schaltkontakten zugewandten Ende,eine rohrförmige Erweiterung auf, so daß eine Kappe 12 gebildet wird, welche die Befestigung an der Schaltkammer 2 ermöglicht. Die Kappe 12 ist mit den Teilen 2 und 7 verlötet.Concentric to the insulator ring 8 with the length s J there is a hollow cylinder 11 in the switching chamber, with which the ceramic is shielded from the switching contacts. The hollow cylinder 11 has a tubular extension at its upper end, ie the end facing the switching contacts in the figure, so that a cap 12 is formed, which enables attachment to the switching chamber 2. The cap 12 is soldered to parts 2 and 7.

Der Abschirmzylinder 11 hat gegenüber der Isolatorlänge s. beispielsweise die dreifache Länge. Er muß jedoch wenigstens die 1,5-fache Länge des Isolatorringes 8 haben, wobei der obere Grenzwert der Länge so bemessen ist, daß der Abstand s zur Grundplatte 5 des Schaltrohres wenigstens so groß ist, wie der während der gesamten Lebensdauer der Kontaktstücke zu erwartende axiale Abbrand z.B. in mm beträgt.The shielding cylinder 11 has s compared to the insulator length . for example three times the length. However, it must have at least 1.5 times the length of the insulator ring 8, the upper limit of the length being such that the distance s to the base plate 5 of the switching tube is at least as great as that to be expected during the entire service life of the contact pieces axial burnup is in mm, for example.

Zwischen der Außenwandung des Abschirmzylinders 11 und der Innenwandung des Isolatorringes 8 bzw. des Metallbalges 6 soll ein möglichst enger Spalt d bestehen, der kleiner ist als die freien Weglängen der verdampfenden Teilchen. Allerdings sind die Fertigungstoleranzen zu berücksichtigen, so daß durch die zu erwartenden Unrundungen, z.B. bei den Isolatorringen keine elektrische leitende Verbindung durch den Abschirmzylinder entstehen kann. Eine Spaltbreite d im Bereich von 0,5 bis 3 mm hat sich als praktikabel und geeignet erwiesen.Between the outer wall of the shielding cylinder 11 and the inner wall of the insulator ring 8 or the metal bellows 6 there should be as narrow a gap d as possible, which is smaller than the free path lengths of the evaporating particles. However, the manufacturing tolerances have to be taken into account, so that due to the expected rounding, e.g. in the case of the insulator rings, no electrically conductive connection can arise through the shielding cylinder. A gap width d in the range of 0.5 to 3 mm has proven to be practical and suitable.

Dauerversuche haben ergeben, daß mit dem vergleichsweise einfachen Aufbau der Abschirmung bereits alle Anforderungen der Praxis erfüllt sind. Auch bei Schaltspielen von mehreren Millionen war die Keramik nicht bedampft und das Schaltvermögen noch voll gewährleistet. Es läßt sich somit ein kostengünstiger Vakuumschalter für Niederspannung aufbauen.Long-term tests have shown that the comparatively simple structure of the shield already meets all practical requirements. Even with switching operations of several million, the ceramic was not steamed and the switching capacity was still fully guaranteed. An inexpensive vacuum switch for low voltage can thus be constructed.

Claims (7)

1. Vakuumschalter für den Niederspannungsbereich, insbesondere Niederspannungsschütz, bestehend aus einem Vakuumschaltrohr mit Schaltkammer und einem darin fest angeordneten ersten Kontaktstück sowie einem demgegenüber beweglichen Stromzuführungsbolzen mit zweitem Kontaktstück, wobei das Vakuumschaltrohr eine Isolatorstrecke aufweist, die vakuumseitig zumindest teilweise von einer Abschirmung umgeben ist, dadurch gekennzeichnet , daß die Abschirmung als konzentrischer Hohlzylinder (11) innerhalb der als Keramikring (8) ausgebildeten Isolatorstrecke angeordnet ist, wobei die axiale Länge des Abschirmzylinders (11) wenigstens das 1,5-fache des Keramikringes (8) beträgt.1.Vacuum switch for the low-voltage range, in particular low-voltage contactor, consisting of a vacuum interrupter with a switching chamber and a first contact piece fixed therein and a movable power supply bolt with a second contact piece, the vacuum interrupter having an insulator section which is at least partially surrounded by a shield on the vacuum side characterized in that the shield is arranged as a concentric hollow cylinder (11) within the insulator section designed as a ceramic ring (8), the axial length of the shielding cylinder (11) being at least 1.5 times the ceramic ring (8). 2. Vakuumschalter nach Anspruch 1, dadurch gekennzeichnet , daß die Länge des Abschirmzylinders (11) so bemessen ist, daß der Abstand zur Grundplatte (5) des Vakuumschaltrohres (1) wenigstens so groß ist, wie der während der gesamten Lebensdauer der Kontaktstücke (4, 10) zu erwartende Abbrand beträgt.2. Vacuum switch according to claim 1, characterized in that the length of the shielding cylinder (11) is dimensioned such that the distance to the base plate (5) of the vacuum switching tube (1) is at least as large as that during the entire life of the contact pieces (4th , 10) the expected burnup is. 3. Vakuumschalter nach Anspruch 1, dadurch gekennzeichnet , daß der Abschirmzylinder (11) etwa die dreifache Länge des Isolatorringes (8) hat.3. Vacuum switch according to claim 1, characterized in that the shielding cylinder (11) has approximately three times the length of the insulator ring (8). 4. Vakuumschalter nach Anspruch 1, dadurch gekennzeichnet , daß der äußere Umfang des Abschirmzylinders (11) einen ausreichenden radialen Abstand vom inneren Umfang des Isolatorringes (8) bzw. des Federbalges (6) aufweist.4. Vacuum switch according to claim 1, characterized in that the outer circumference of the shielding cylinder (11) has a sufficient radial distance from the inner circumference of the insulator ring (8) or the bellows (6). 5. Vakuumschalter nach Anspruch 4, dadurch gekennzeichnet , daß zwischen Innenseite des Isolatorringes (8) und Außenseite des Abschirmzylinders (11) ein radialer Spalt zwischen 0,5 und 3 mm besteht.5. Vacuum switch according to claim 4, characterized in that there is a radial gap between 0.5 and 3 mm between the inside of the insulator ring (8) and the outside of the shielding cylinder (11). 6. Vakuumschalter nach Anspruch 1, dadurch gekennzeichnet , daß der Abschirmzylinder (11) in der- Schaltkammer (2) an derjenigen Seite des Keramikringes (8) angebracht ist, die direkt mit dem feststehenden Kontaktstück verbunden ist.6. Vacuum switch according to claim 1, characterized in that the shielding cylinder (11) in the switching chamber (2) is attached to that side of the ceramic ring (8) which is connected directly to the fixed contact piece. 7. Vakuumschalter nach Anspruch 6, dadurch gekennzeichnet , daß der Abschirmzylinder (11) an seiner Befestigungsseite eine rohrförmige Erweiterung (12) aufweist.7. Vacuum switch according to claim 6, characterized in that the shielding cylinder (11) has a tubular extension (12) on its fastening side.
EP84114144A 1983-12-05 1984-11-22 Vacuum switch for low tension, particularly a low tension protector Expired EP0149061B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE8334848U DE8334848U1 (en) 1983-12-05 1983-12-05 Vacuum switch for the low voltage range, especially low voltage contactor
DE19833343918 DE3343918A1 (en) 1983-12-05 1983-12-05 VACUUM SWITCH FOR THE LOW VOLTAGE AREA, IN PARTICULAR LOW VOLTAGE PROTECTION
DE3343918 1983-12-05

Publications (2)

Publication Number Publication Date
EP0149061A1 true EP0149061A1 (en) 1985-07-24
EP0149061B1 EP0149061B1 (en) 1987-06-24

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EP84114144A Expired EP0149061B1 (en) 1983-12-05 1984-11-22 Vacuum switch for low tension, particularly a low tension protector

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US (1) US4614850A (en)
EP (1) EP0149061B1 (en)
JP (1) JPS60138816A (en)
DE (2) DE8334848U1 (en)

Cited By (2)

* 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
WO2000052719A1 (en) * 1999-02-26 2000-09-08 Siemens Aktiengesellschaft Vacuum interrupter chamber with ring-shaped insulator

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672156A (en) * 1986-04-04 1987-06-09 Westinghouse Electric Corp. Vacuum interrupter with bellows shield
DE8618632U1 (en) * 1986-07-11 1988-12-22 Siemens AG, 1000 Berlin und 8000 München Vacuum interrupter
DE3718531A1 (en) * 1987-05-29 1988-08-11 Slamecka Ernst Vacuum switch
NL8901748A (en) * 1989-07-07 1991-02-01 Holec Syst & Componenten METHOD FOR ATTACHING A METAL SCREEN IN THE HOUSING OF A VACUUM SWITCH, SCREEN THEREFOR, AND VACUUM SWITCH PROVIDED WITH SUCH SCREEN.
DE59300057D1 (en) * 1992-03-31 1995-02-23 Siemens Ag Vacuum switching tube for low and medium voltage switches, especially for vacuum contactors.
DE9401655U1 (en) * 1993-06-18 1994-11-03 Siemens AG, 80333 München Vacuum interrupter with ring-shaped insulator
DE4419380C1 (en) * 1994-05-30 1995-10-19 Siemens Ag Circuit breaker module
DE19510850C1 (en) * 1995-03-17 1996-07-25 Siemens Ag Vacuum switch tube for low voltage protection
DE19802893A1 (en) * 1998-01-21 1999-07-22 Siemens Ag Low-voltage (LV) vacuum circuit-breaker vacuum interrupter chamber with ring-shaped insulator
DE19826766C1 (en) * 1998-06-12 2000-03-30 Siemens Ag Vacuum interrupter with a steam shield assigned to the insulator
CN105719891B8 (en) * 2013-11-27 2019-04-16 乐清市川嘉电气科技有限公司 Promote the vacuum switch tube of insulation performance
CN105895444A (en) * 2013-11-27 2016-08-24 赵牧青 Vacuum switching tube for improving uniformity of electric field distribution
CN105742111B8 (en) * 2013-11-27 2019-04-12 乐清市川嘉电气科技有限公司 Vacuum switch tube with improved electric field distribution uniformity
CN105742113B8 (en) * 2013-11-27 2019-04-19 乐清市川嘉电气科技有限公司 A kind of vacuum switch tube
CN105742112B8 (en) * 2013-11-27 2019-04-12 乐清市川嘉电气科技有限公司 A Vacuum Switching Tube with Better Buffer Effect
CN105762003B8 (en) * 2013-11-27 2019-03-22 乐清市川嘉电气科技有限公司 A kind of vacuum switch tube promoting insulation performance
CN104979131B (en) * 2015-07-09 2017-03-15 温州浙光电子有限公司 A kind of can be directly and the sealing structure of crunch seal

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1565744A (en) * 1968-03-29 1969-05-02
DE2612129A1 (en) * 1975-03-22 1976-10-07 Gemvac Kk VACUUM CIRCUIT BREAKER
DE2616516A1 (en) * 1975-07-29 1977-02-10 Sprecher & Schuh Ag VACUUM SWITCH
GB2033665A (en) * 1978-10-26 1980-05-21 Vacuum Interrupters Ltd Vacuum interrupter or spark gap envelope
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

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087034A (en) * 1960-06-20 1963-04-23 Ling Altec Electronics Inc Vacuum switch
US3163734A (en) * 1962-01-26 1964-12-29 Gen Electric Vacuum-type circuit interrupter with improved vapor-condensing shielding
GB1079013A (en) * 1964-04-21 1967-08-09 English Electric Co Ltd Improvements in or relating to contacts and electrodes
DE1957829B2 (en) * 1969-04-18 1977-12-15 VEB Elektro-Apparate-Werke Berlin Treptow, DDR 1193 Berlin-Treptow LOW VOLTAGE VACUUM SWITCH
JPS4919363A (en) * 1972-06-16 1974-02-20
SU474058A1 (en) * 1973-01-12 1975-06-14 Предприятие П/Я А-7147 Vacuum arc-suppressing chamber
US3950628A (en) * 1974-10-10 1976-04-13 Westinghouse Electric Corporation Bellows type shorting switch
JPS5676131A (en) * 1979-11-26 1981-06-23 Meidensha Electric Mfg Co Ltd Vacuum breaker

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1565744A (en) * 1968-03-29 1969-05-02
DE2612129A1 (en) * 1975-03-22 1976-10-07 Gemvac Kk VACUUM CIRCUIT BREAKER
DE2616516A1 (en) * 1975-07-29 1977-02-10 Sprecher & Schuh Ag VACUUM SWITCH
GB2033665A (en) * 1978-10-26 1980-05-21 Vacuum Interrupters Ltd Vacuum interrupter or spark gap envelope
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

Cited By (2)

* 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
WO2000052719A1 (en) * 1999-02-26 2000-09-08 Siemens Aktiengesellschaft Vacuum interrupter chamber with ring-shaped insulator

Also Published As

Publication number Publication date
EP0149061B1 (en) 1987-06-24
US4614850A (en) 1986-09-30
DE3343918A1 (en) 1985-06-13
DE8334848U1 (en) 1986-05-07
JPS60138816A (en) 1985-07-23

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