EP0568166A2 - Vacuum switch tube - Google Patents

Vacuum switch tube Download PDF

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Publication number
EP0568166A2
EP0568166A2 EP93250100A EP93250100A EP0568166A2 EP 0568166 A2 EP0568166 A2 EP 0568166A2 EP 93250100 A EP93250100 A EP 93250100A EP 93250100 A EP93250100 A EP 93250100A EP 0568166 A2 EP0568166 A2 EP 0568166A2
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EP
European Patent Office
Prior art keywords
contact
insulator
contact pieces
vacuum interrupter
stroke
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
EP93250100A
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German (de)
French (fr)
Other versions
EP0568166B1 (en
EP0568166A3 (en
Inventor
Jörg Dipl.-Ing. Kusserow
Roman Dr.Dipl.-Phys. Renz
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Siemens AG
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Siemens AG
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Publication date
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Publication of EP0568166A2 publication Critical patent/EP0568166A2/en
Publication of EP0568166A3 publication Critical patent/EP0568166A3/xx
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Publication of EP0568166B1 publication Critical patent/EP0568166B1/en
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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
    • H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
    • 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
    • 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
    • H01H33/66238—Specific bellows details
    • H01H2033/66246—Details relating to the guiding of the contact rod in vacuum switch belows
    • 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
    • H01H33/66238—Specific bellows details

Definitions

  • the invention is in the field of energy distribution and can be used in the design of a vacuum interrupter in which the switching contacts are directly surrounded by an insulating housing part.
  • Vacuum switches For power interruption in power distribution networks and for the power supply of larger consumers, i.a. Vacuum switches are used, which essentially consist of a vacuum interrupter as the actual switching element and a drive device, the axially movable contact piece of the vacuum interrupter being firmly coupled to the drive device.
  • the drive device is designed so that within the vacuum interrupter - depending on the switching voltage - there is a certain contact stroke in the range between about 1 to 20 mm (brochure "Medium Voltage / Vacuum Switching Technology" from Siemens AG, No. A 19 100-E 769-B 162, page 8).
  • the cylindrical housing part consists of one or two axially adjacent insulators and in which a hollow cylindrical metal shield is provided to protect the inner wall of the insulator against the precipitation of metal vapor.
  • This metal screen directly surrounds the contact pieces and is either on the insulator or attached to the interface of two insulators or to one of the two end plates of the housing (DE 25 35 150, DE 26 12 129, DE 27 25 092).
  • the invention has for its object to design the vacuum interrupter so that the insulating ability of the insulator is safely maintained without using a metal screen.
  • the invention provides that the radial distance of the insulator from the contact pieces is less than or at most equal to the contact stroke.
  • the insulator is only vaporized in a limited area.
  • the remaining non-vaporized surface areas of the insulator are sufficient to maintain the required insulating capacity.
  • the vaporization of the insulator only in the area of the contact pieces can be additionally limited, in particular in the case of breaking currents in the range 12 to 25 kA, by the fact that the contact pieces are designed as axial magnetic field contacts.
  • Vacuum interrupters designed according to the invention can be used in particular for vacuum interrupters which are operated in the lower power range and thus short-circuit currents up to max. 25 kA have to be switched and where it can be foreseen due to the operating conditions that they only have to withstand a small number of short-circuit current interruptions during their service life.
  • the insulator is only vaporized in a limited area, it is advisable to narrow the free cross section between the respective contact pin and the insulator in the area between the contact pieces and one or both end plates.
  • This narrowing can take place, for example, by means of a disk or by means of a plate-like part which is fastened to one or both contact bolts or to the bottom of one or both contact pieces. It is advantageous if the free cross section is narrowed to a gap width that is less than or at most equal to half the contact stroke.
  • the insulator is provided in the area of the rear area of one or both contact pieces with a radially inwardly projecting annular extension, whereby the region of the insulator wall located between this annular extension and the end plate is reliably shaded.
  • the vacuum interrupter according to FIG. 1 has, in a manner known per se, a housing which consists of the hollow cylindrical ceramic insulator 11, the two metal end plates 12 and 13 and the bellows 14.
  • the two contact pieces 15 and 16 are arranged within the housing, the contact pins 17 and 18 of which are guided outwards and are soldered to the end plate 12 or the bellows 14 in a vacuum-tight manner.
  • the insulator 11 has a radial distance a from the contact pieces 15 and 16, which can be radial field or axial magnetic field contacts, which is chosen to be smaller than the nominal switching stroke of the axially movable contact piece 16.
  • the contact stroke of the movable switching contact 5 is about 14 mm.
  • the housing of the vacuum interrupter 10 also consists of a hollow cylindrical ceramic insulator 11, the two metal end plates 12 and 13 and the bellows 14. Inside the housing, the two contact pieces 15 and 16 are arranged, the contact pins 17 and 18 are guided to the outside.
  • the contact pieces 15 and 16 are pot contacts which are known per se and which are designed as axial magnetic field contacts by means of the slit provided. Instead of pot contacts (eg EP-0 155 376), other axial magnetic field contacts (eg DE 24 43 141) can also be used.
  • the inner diameter of the ceramic insulator 11 is chosen so that the radial distance a of the switching contacts 15/16 from the insulator 11 is less than or at most equal to the nominal switching stroke of the contact 16.
  • - Plate-like parts 19 and 20 are further soldered to the bottom of the contact pieces 15 and 16, which narrow the free cross section in the rear space of the two contacts 15 and 16 to a radial gap, the gap width b of which is less than or at most equal to half the nominal contact stroke of the Switch contact 16 is.
  • the radial distance between the two switching contacts 15 and 16 from the insulator 21 is also chosen to be smaller or at most equal to the nominal contact stroke.
  • the centering disk 22 for the bellows 14 is expanded radially, so that the remaining gap width is at most equal to half the contact stroke.
  • the ceramic insulator 21 is narrowed by an annular extension 23 to such an extent that the adjacent wall area of the insulator is securely shaded up to the end plate 12.

Landscapes

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

Abstract

For vacuum switches which are used for interrupting short-circuit currents only rarely, a vacuum switching tube is used whose housing has an insulator (11) which directly surrounds the contact elements, the radial distance (a) between the insulator (11) and the contact elements (15, 16) being selected to be less than or at most equal to the contact stroke. In addition, the contact elements (15, 16) can be constructed as axial magnetic field contacts, and the free cross-section in the rear space of the contact elements (15, 16) can be constrained by radial expansions (19, 20; 22) on the contact bolts or by radial constrictions (23) of the insulator (21). <IMAGE>

Description

Die Erfindung liegt auf dem Gebiet der Energieverteilung und ist bei der konstruktiven Ausgestaltung einer Vakuumschaltröhre anzuwenden, bei der die Schaltkontakte direkt von einem isolierenden Gehäuseteil umgeben sind.The invention is in the field of energy distribution and can be used in the design of a vacuum interrupter in which the switching contacts are directly surrounded by an insulating housing part.

Zur Stromunterbrechung in Energieverteilungsnetzen sowie bei der Stromversorgung größerer Verbraucher werden u.a. Vakuumschalter eingesetzt, die im wesentlichen aus einer Vakuumschaltröhre als dem eigentlichen Schaltorgan und aus einer Antriebseinrichtung bestehen, wobei das axial bewegliche Kontaktstück der Vakuumschaltröhre mit der Antriebseinrichtung fest gekoppelt ist. Die Antriebseinrichtung ist dabei so ausgelegt, daß sich innerhalb der Vakuumschaltröhre - je nach Schaltspannung - ein bestimmter Kontakthub im Bereich zwischen etwa 1 bis 20 mm ergibt (Prospekt "Mittelspannung/Vakuumschalttechnik" der Siemens AG, Nr. A 19 100-E 769-B 162, Seite 8).For power interruption in power distribution networks and for the power supply of larger consumers, i.a. Vacuum switches are used, which essentially consist of a vacuum interrupter as the actual switching element and a drive device, the axially movable contact piece of the vacuum interrupter being firmly coupled to the drive device. The drive device is designed so that within the vacuum interrupter - depending on the switching voltage - there is a certain contact stroke in the range between about 1 to 20 mm (brochure "Medium Voltage / Vacuum Switching Technology" from Siemens AG, No. A 19 100-E 769-B 162, page 8).

Neben Vakuumschaltröhren, bei denen das Gehäuse im Bereich der Kontaktstücke aus einem metallischen Hohlzylinder besteht, der die Kontakte direkt umgibt und an den beidendig hohlzylindrische Isolatoren, in aller Regel aus Keramik, angelötet sind (DE 19 15 198), sind auch Vakuumschaltröhren üblich, deren zylindrisches Gehäuseteil aus einem oder zwei axial aneinander angrenzenden Isolatoren besteht und bei denen zum Schutz der Innenwand des Isolators gegen den Niederschlag von Metalldampf ein hohlzylindrischer Metallschirm vorgesehen ist. Dieser Metallschirm umgibt die Kontaktstücke direkt mit Abstand und ist entweder am Isolator oder an der Nahtstelle zweier Isolatoren oder an einer der beiden Endplatten des Gehäuses befestigt (DE 25 35 150, DE 26 12 129, DE 27 25 092).In addition to vacuum interrupters, in which the housing in the area of the contact pieces consists of a metallic hollow cylinder, which directly surrounds the contacts and to which hollow cylindrical insulators, usually made of ceramic, are soldered (DE 19 15 198), vacuum interrupters are also common, the cylindrical housing part consists of one or two axially adjacent insulators and in which a hollow cylindrical metal shield is provided to protect the inner wall of the insulator against the precipitation of metal vapor. This metal screen directly surrounds the contact pieces and is either on the insulator or attached to the interface of two insulators or to one of the two end plates of the housing (DE 25 35 150, DE 26 12 129, DE 27 25 092).

Bei einer weiterhin bekannten Vakuumschaltröhre (US 5 004 877) mit einem hohlzylindrischen Isolator als sich axial erstreckendes Gehäuseteil ist zwischen den Kontaktstücken und dem Isolator kein Metallschirm vorgesehen. Um wenigstens an einem Ende des Isolators den Niederschlag von Metalldampf zu unterbinden, ist dort ein Metallschirm an dem feststehenden Kontaktbolzen befestigt.In a further known vacuum interrupter (US 5 004 877) with a hollow cylindrical insulator as an axially extending housing part, no metal screen is provided between the contact pieces and the insulator. In order to prevent the precipitation of metal vapor at least at one end of the insulator, a metal screen is attached to the fixed contact bolt there.

Ausgehend von einer Vakuumschaltröhre gemäß den Merkmalen des Oberbegriffes des Patentanspruches 1 liegt der Erfindung die Aufgabe zugrunde, die Vakuumschaltröhre so auszugestalten, daß ohne Verwendung eines Metallschirmes das Isoliervermögen des Isolators sicher aufrechterhalten wird.Starting from a vacuum interrupter according to the features of the preamble of claim 1, the invention has for its object to design the vacuum interrupter so that the insulating ability of the insulator is safely maintained without using a metal screen.

Zur Lösung dieser Aufgabe ist gemaß der Erfindung vorgesehen, daß der radiale Abstand des Isolators von den Kontaktstücken kleiner oder höchstens gleich dem Kontakthub ist.To achieve this object, the invention provides that the radial distance of the insulator from the contact pieces is less than or at most equal to the contact stroke.

Bei einer derartigen Ausgestaltung der Vakuumschaltröhre wird durch Minimierung des Abstandes zwischen den Kontaktstücken und dem umgebenden Isolator erreicht, daß der Isolator nur in einem begrenzten Bereich bedampft wird. Die verbleibenden unbedampften Oberflächenbereiche des Isolators sind dabei zur Aufrechterhaltung des erforderlichen Isoliervermögens ausreichend. Die Bedampfung des Isolators nur im Bereich der Kontaktstücke kann insbesondere bei Ausschaltströmen im Bereich 12 bis 25 kA zusätzlich dadurch begrenzt werden, daß die Kontaktstücke als Axial-Magnetfeld-Kontakte ausgebildet sind. Dabei wird von der magnetischen Abschirmwirkung von Axial-Magnetfeld-Kontakten Gebrauch gemacht, die darin besteht, daß unter der Einwirkung des fließenden Stromes ein magnetischer Käfig entsteht, der das Austreten von Metalldampf aus dem Bereich zwischen den beiden Kontakten nach außen wenigstens teilweise unterbindet. - Gemäß der Erfindung ausgebildete Vakuumschaltröhren können insbesondere für Vakuumschalter eingesetzt werden, die im unteren Leistungsbereich betrieben werden und somit Kurzschlußströme bis max. 25 kA zu schalten haben und bei denen aufgrund der Betriebsbedingungen abzusehen ist, daß sie nur einer geringen Anzahl von Kurzschlußstrom-Unterbrechungen während ihrer Lebensdauer standhalten müssen.In such a configuration of the vacuum interrupter, by minimizing the distance between the contact pieces and the surrounding insulator, the insulator is only vaporized in a limited area. The remaining non-vaporized surface areas of the insulator are sufficient to maintain the required insulating capacity. The vaporization of the insulator only in the area of the contact pieces can be additionally limited, in particular in the case of breaking currents in the range 12 to 25 kA, by the fact that the contact pieces are designed as axial magnetic field contacts. Use is made of the magnetic shielding effect of axial magnetic field contacts, which consists in the fact that a magnetic cage is formed under the action of the flowing current, which at least partially prevents the escape of metal vapor from the area between the two contacts to the outside. - Vacuum interrupters designed according to the invention can be used in particular for vacuum interrupters which are operated in the lower power range and thus short-circuit currents up to max. 25 kA have to be switched and where it can be foreseen due to the operating conditions that they only have to withstand a small number of short-circuit current interruptions during their service life.

Zur Unterstützung des durch die erfindungsgemäße Dimensionierung erzielten Effektes, daß der Isolator nur in einem begrenzten Bereich bedampft wird, empfiehlt es sich, den freien Querschnitt zwischen dem jeweiligen Kontaktbolzen und dem Isolator im Bereich zwischen den Kontaktstücken und einer oder beiden Endplatten einzuengen. Diese Einengung kann beispielsweise durch eine Scheibe oder durch ein tellerartiges Teil erfolgen, das jeweils an einem oder beiden Kontaktbolzen oder an der Bodenseite eines oder beider Kontaktstücke befestiqt ist. Dabei ist es von Vorteil, wenn der freie Querschnitt auf eine Spaltbreite eingeengt ist, die kleiner oder höchstens gleich dem halben Kontakthub ist. Man kann aber auch in der Weise vorgehen, daß man den Isolator im Bereich des Hinterraumes eines oder beider Kontaktstücke mit einem radial nach innen ragenden ringförmigen Ansatz versieht, wodurch der zwischen diesem ringförmigen Ansatz und der Endplatte befindliche Bereich der Isolatorwandung sicher abgeschattet ist.To support the effect achieved by the dimensioning according to the invention that the insulator is only vaporized in a limited area, it is advisable to narrow the free cross section between the respective contact pin and the insulator in the area between the contact pieces and one or both end plates. This narrowing can take place, for example, by means of a disk or by means of a plate-like part which is fastened to one or both contact bolts or to the bottom of one or both contact pieces. It is advantageous if the free cross section is narrowed to a gap width that is less than or at most equal to half the contact stroke. However, one can also proceed in such a way that the insulator is provided in the area of the rear area of one or both contact pieces with a radially inwardly projecting annular extension, whereby the region of the insulator wall located between this annular extension and the end plate is reliably shaded.

Ausführungsbeispiele der Erfindung sind in den Figuren 1 bis 3 dargestellt. Dabei zeigt

Figur 1
eine Vakuumschaltröhre mit den Merkmalen des Patentanspruches 1 und die
Figuren 2 und 3
zwei Ausführungsbeispiele mit zusätzlichen Merkmalen gemäß den Patentansprüchen 2 bis 5.
Exemplary embodiments of the invention are shown in FIGS. 1 to 3. It shows
Figure 1
a vacuum interrupter with the features of claim 1 and the
Figures 2 and 3
two embodiments with additional features according to claims 2 to 5.

Die Vakuumschaltröhre gemäß Figur 1 weist in an sich bekannter Weise ein Gehäuse auf, das aus dem hohlzylindrischen Keramikisolator 11, den beiden metallischen Endplatten 12 und 13 und dem Federbalg 14 besteht. Innerhalb des Gehäuses sind die beiden Kontaktstücke 15 und 16 angeordnet, deren Kontaktbolzen 17 und 18 nach außen geführt und mit der Endplatte 12 bzw. dem Federbalg 14 vakuumdicht verlötet sind. Der Isolator 11 hat von den Kontaktstücken 15 und 16, bei denen es sich um Radialfeld- oder um Axialmagnetfeld-Kontakte handeln kann, einen radialen Abstand a, der kleiner als der Nennschalthub des axial beweglichen Kontaktstückes 16 gewählt ist. Dabei beträgt der Kontakthub des beweglichen Schaltkontaktes 5 etwa 14 mm.The vacuum interrupter according to FIG. 1 has, in a manner known per se, a housing which consists of the hollow cylindrical ceramic insulator 11, the two metal end plates 12 and 13 and the bellows 14. The two contact pieces 15 and 16 are arranged within the housing, the contact pins 17 and 18 of which are guided outwards and are soldered to the end plate 12 or the bellows 14 in a vacuum-tight manner. The insulator 11 has a radial distance a from the contact pieces 15 and 16, which can be radial field or axial magnetic field contacts, which is chosen to be smaller than the nominal switching stroke of the axially movable contact piece 16. The contact stroke of the movable switching contact 5 is about 14 mm.

Das Gehäuse der Vakuumschaltröhre 10 gemäß Figur 2 besteht ebenfalls aus einem hohlzylindrischen Keramikisolator 11, den beiden metallischen Endplatten 12 und 13 und dem Federbalg 14. Innerhalb des Gehäuses sind die beiden Kontaktstücke 15 und 16 angeordnet, deren Kontaktbolzen 17 und 18 nach außen geführt sind. Bei den Kontaktstücken 15 und 16 handelt es sich um an sich bekannte Topfkontakte, die mittels der vorgesehenen Schlitzung als Axial-Magnetfeld-Kontakte ausgebildet sind. Anstelle von Topfkontakten (z.B. EP-0 155 376) können auch andere Axial-Magnetfeld-Kontakte (z.B. DE 24 43 141) verwendet werden.The housing of the vacuum interrupter 10 according to Figure 2 also consists of a hollow cylindrical ceramic insulator 11, the two metal end plates 12 and 13 and the bellows 14. Inside the housing, the two contact pieces 15 and 16 are arranged, the contact pins 17 and 18 are guided to the outside. The contact pieces 15 and 16 are pot contacts which are known per se and which are designed as axial magnetic field contacts by means of the slit provided. Instead of pot contacts (eg EP-0 155 376), other axial magnetic field contacts (eg DE 24 43 141) can also be used.

Der Innendurchmesser des Keramikisolator 11 ist so gewählt, daß der radiale Abstand a der Schaltkontakte 15/16 vom Isolator 11 kleiner oder höchstens gleich dem Nenn-Schalthub des Kontaktes 16 ist. - An den Boden der Kontaktstücke 15 und 16 sind weiterhin tellerartige Teile 19 bzw. 20 angelötet, die den freien Querschnitt im Hinterraum der beiden Kontakte 15 und 16 auf einen radialen Spalt einengen, dessen Spaltbreite b kleiner oder höchstens gleich dem halben Nenn-Kontakthub des Schaltkontaktes 16 ist.The inner diameter of the ceramic insulator 11 is chosen so that the radial distance a of the switching contacts 15/16 from the insulator 11 is less than or at most equal to the nominal switching stroke of the contact 16. - Plate-like parts 19 and 20 are further soldered to the bottom of the contact pieces 15 and 16, which narrow the free cross section in the rear space of the two contacts 15 and 16 to a radial gap, the gap width b of which is less than or at most equal to half the nominal contact stroke of the Switch contact 16 is.

Bei der Vakuumschaltröhre gemäß Figur 3 ist der radiale Abstand der beiden Schaltkontakte 15 und 16 vom Isolator 21 ebenfalls kleiner oder höchstens gleich dem Nenn-Kontakthub gewählt. Zur Verengung des Querschnittes im Hinterraum des Schaltkontaktes 16 ist die Zentrierscheibe 22 für den Faltenbalg 14 radial erweitert, so daß die verbleibende Spaltbreite höchstens gleich der Hälfte des Kontakthubes ist. - Im Hinterraum des Schaltkontaktes 15 ist der Keramikisolator 21 durch einen ringförmigen Ansatz 23 soweit eingeengt, daß der angrenzende Wandbereich des Isolators bis zur Endplatte 12 hin sicher abgeschattet ist.In the vacuum interrupter according to FIG. 3, the radial distance between the two switching contacts 15 and 16 from the insulator 21 is also chosen to be smaller or at most equal to the nominal contact stroke. To narrow the cross section in the rear space of the switching contact 16, the centering disk 22 for the bellows 14 is expanded radially, so that the remaining gap width is at most equal to half the contact stroke. - In the rear of the switch contact 15, the ceramic insulator 21 is narrowed by an annular extension 23 to such an extent that the adjacent wall area of the insulator is securely shaded up to the end plate 12.

Claims (5)

Vakuumschaltröhre, derem axial beweglichem Kontaktstück ein bestimmter Kontakthub zugeordnet ist und deren die Kontaktstücke umschließendes zylindrisches Gehäuse wenigstens einen hohlzylindrischen Isolator und zwei an den Stirnseiten angeordnete metallene Endplatten aufweist, wobei die Kontaktstücke direkt von dem Isolator umgeben sind,
dadurch gekennzeichnet,
daß der radiale Abstand (a) des Isolators (11) von den Kontaktstücken (15,16) kleiner oder höchstens gleich dem Kontakthub ist.Vacuum interrupter to which a certain contact stroke is assigned to the axially movable contact piece and whose cylindrical housing surrounding the contact pieces has at least one hollow cylindrical insulator and two metal end plates arranged on the end faces, the contact pieces being directly surrounded by the insulator,
characterized,
that the radial distance (a) of the insulator (11) from the contact pieces (15, 16) is less than or at most equal to the contact stroke. Vakuumschalter nach Anspruch 1,
dadurch gekennzeichnet,
daß die Kontaktstücke (15,16) als Axial-Magnetfeld-Kontakte ausgebildet sindVacuum switch according to claim 1,
characterized,
that the contact pieces (15, 16) are designed as axial magnetic field contacts Vakuumschaltröhre nach Anspruch 1 oder 2.
dadurch gekennzeichnet,
daß im Bereich zwischen den Kontaktstücken (15,16) und einer oder beiden Endplatten (12,13) der freie Querschnitt zwischen dem jeweiligen Kontaktbolzen (17,18) und dem Isolator (11) durch eine Scheibe oder ein tellerartiges Teil (19,20), das an dem jeweiligen Kontaktbolzen oder an der Bodenseite des Kontaktteiles befestigt ist, eingeengt ist.Vacuum interrupter according to claim 1 or 2.
characterized,
that in the area between the contact pieces (15, 16) and one or both end plates (12, 13) the free cross section between the respective contact pin (17, 18) and the insulator (11) through a washer or a plate-like part (19, 20 ), which is attached to the respective contact bolt or on the bottom side of the contact part, is restricted. Vakuumschaltröhre nach Anspruch 3,
dadurch gekennzeichnet,
daß der freie Querschnitt auf eine Spaltbreite (b) eingeengt ist, die kleiner oder höchstens gleich dem halben Kontakthub ist.Vacuum interrupter according to claim 3,
characterized,
that the free cross section is narrowed to a gap width (b) which is less than or at most equal to half the contact stroke. Vakuumschaltröhre nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß der Isolator (21) im Bereich des Hinterraumes eines oder beider Kontaktstücke (15) einen radial nach innen ragenden ringförmigen Ansatz (23) aufweist.Vacuum interrupter according to claim 1 or 2,
characterized,
that the insulator (21) in the area of the rear space of one or both contact pieces (15) has a radially inwardly projecting annular projection (23).
EP93250100A 1992-04-29 1993-04-02 Vacuum switch tube Expired - Lifetime EP0568166B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4214550A DE4214550A1 (en) 1992-04-29 1992-04-29 VACUUM SWITCH TUBES
DE4214550 1992-04-29
US08/055,123 US5313030A (en) 1992-04-29 1993-04-29 Vacuum switch

Publications (3)

Publication Number Publication Date
EP0568166A2 true EP0568166A2 (en) 1993-11-03
EP0568166A3 EP0568166A3 (en) 1994-01-12
EP0568166B1 EP0568166B1 (en) 1996-12-27

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EP93250100A Expired - Lifetime EP0568166B1 (en) 1992-04-29 1993-04-02 Vacuum switch tube

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US (1) US5313030A (en)
EP (1) EP0568166B1 (en)
DE (1) DE4214550A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9401655U1 (en) * 1993-06-18 1994-11-03 Siemens AG, 80333 München Vacuum interrupter with ring-shaped insulator
KR100361390B1 (en) * 1994-11-16 2003-02-19 이턴 코포레이션 Cylindrical coil and contact support for vacuum interrupter
US5777287A (en) * 1996-12-19 1998-07-07 Eaton Corporation Axial magnetic field coil for vacuum interrupter
DE10029763B4 (en) * 2000-06-16 2009-01-15 Siemens Ag Vacuum interrupter
JP3690979B2 (en) * 2000-11-30 2005-08-31 日本特殊陶業株式会社 Metal-ceramic joint and vacuum switch unit using the same
JP3840934B2 (en) * 2001-09-12 2006-11-01 株式会社明電舎 Contactor for vacuum interrupter and vacuum interrupter
CN100442413C (en) * 2001-09-12 2008-12-10 株式会社明电舍 Contact for vacuum circuit breaker and vacuum circuit breaker using said contact
DE102017222413A1 (en) * 2017-12-11 2019-06-13 Siemens Aktiengesellschaft Overpressure-resistant vacuum interrupter
US10796867B1 (en) 2019-08-12 2020-10-06 Eaton Intelligent Power Limited Coil-type axial magnetic field contact assembly for vacuum interrupter
DE102019216663B4 (en) * 2019-10-29 2023-02-02 Siemens Aktiengesellschaft Vacuum switching device for a circuit with main and auxiliary current path

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DE3302226A1 (en) * 1983-01-24 1984-07-26 Siemens AG, 1000 Berlin und 8000 München Contact arrangement for vacuum switches
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US5004877A (en) * 1988-10-03 1991-04-02 Square D Company Vacuum interrupter

Also Published As

Publication number Publication date
US5313030A (en) 1994-05-17
DE4214550A1 (en) 1993-11-04
EP0568166B1 (en) 1996-12-27
EP0568166A3 (en) 1994-01-12

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