EP1845540B1 - Three-position switch in particular for middle- or high voltage switchgear - Google Patents

Three-position switch in particular for middle- or high voltage switchgear Download PDF

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Publication number
EP1845540B1
EP1845540B1 EP20060025171 EP06025171A EP1845540B1 EP 1845540 B1 EP1845540 B1 EP 1845540B1 EP 20060025171 EP20060025171 EP 20060025171 EP 06025171 A EP06025171 A EP 06025171A EP 1845540 B1 EP1845540 B1 EP 1845540B1
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EP
European Patent Office
Prior art keywords
position switch
connection piece
housing
sleeve
outside
Prior art date
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Active
Application number
EP20060025171
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German (de)
French (fr)
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EP1845540A2 (en
EP1845540A3 (en
Inventor
Achim Stelter
Karsten Stumpf
Hilmar Reitz
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GE Grid GmbH
Original Assignee
Areva Energietechnik GmbH
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Application filed by Areva Energietechnik GmbH filed Critical Areva Energietechnik GmbH
Publication of EP1845540A2 publication Critical patent/EP1845540A2/en
Publication of EP1845540A3 publication Critical patent/EP1845540A3/en
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Classifications

    • 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
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts
    • 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
    • H01H33/02—Details
    • H01H33/025—Terminal arrangements

Definitions

  • the invention relates to a three-position switch, in particular for a medium or high voltage switchgear, with the features of the preamble of claim 1.
  • Such a three-position switch is off DE 2 037 234 A1 known.
  • a non-generic three-position switch is for example from the EP 1 128 509 A1 known.
  • This is a gas-insulated switch, in which the two connecting pieces on the circumference of the housing accessible from the outside and thus the respectively associated electrical conductors are connected there.
  • the object of the invention is to provide a three-position switch, which contributes to the reduction of the required space.
  • the displaceable contact part is formed as a sleeve which is pushed back and forth on the pin or tubular second connector.
  • the three-position switch can thus be used together with another switching device, e.g. a circuit breaker, fully assembled and factory tested, and then to be transported as a complete device to the site due to the compactness of the entire arrangement.
  • another switching device e.g. a circuit breaker
  • the inventive arrangement of the two connecting pieces is further achieved that no components of the three-position switch are present or must be accessible at the periphery of the housing. This results in the advantage that other components of the electrical switchgear can be arranged on the circumference of the three-position switch. This leads to a further reduction of the total required space.
  • At least one current transformer core is arranged on the circumference of the housing of the three-position switch. This means that the Three-position switch is integrated within the current transformer core. Overall, this design has a much smaller footprint than the current transformer cores and the three-position switch in a separate design require.
  • the first connection piece has a portion which is provided with a bore which is accessible from the outside at the first end side, and in which the electrical conductor can be inserted from the outside.
  • the connectability of the first connector and the electrical conductor according to the invention can be realized on the first end side in a simple manner. It is understood that the bore can be arranged approximately coaxially with the axis, but also off-center on the front side.
  • the second connection piece protrudes outwards on the second end face and the electrical conductor can be connected from the outside there.
  • This likewise represents a simple realization of the connectability according to the invention of the second connection piece and of the electrical conductor on the second end face.
  • the connection is provided approximately coaxially to the axis or off-center.
  • the first connector has a second connector facing portion which is provided with a bore whose inner diameter is adapted to the outer diameter of the sleeve. This makes it possible in a particularly advantageous manner, electrically connect the first and the second connector via the sleeve with each other.
  • the displaceable contact part is connected to a plate which projects approximately transversely to the axis of the contact part. With the help of this plate, it is possible to influence the electric field in the interior of the three-position switch. This can be used to make the three-position switch according to the invention even more compact.
  • the housing has an inwardly projecting portion whose inner diameter is adapted to the outer diameter of the plate is particularly advantageous.
  • the plate thus has a double function, namely for field control and grounding.
  • the displaceable contact part via a transmission in particular a lever is movable back and forth, and when the transmission, in particular the lever is arranged on the side facing away from the first connecting piece of the plate. In this way, the plate can be used for electrical shielding of the lever.
  • FIG. 1 shows a schematic sectional view of an embodiment of a three-position switch according to the invention in a grounded position
  • FIG. 2 shows a schematic sectional view of the three-position switch of FIG. 1 in a separate position
  • FIG. 3 shows a schematic sectional view of the three-position switch of FIG. 1 in a closed position.
  • FIGS. 1 to 3 is a three-position switch 10 of a medium or high voltage switchgear shown.
  • AIS air-insulated switchgear
  • GIS gas-insulated switchgear
  • the three-position switch 10 of FIGS. 1 to 3 is largely rotationally symmetrical and has an axis A. Approximately transversely to the axis A, the three-position switch 10 has a first end face S1 and a second end face S2.
  • the three-position switch 10 has a housing 13 which is formed substantially cylindrical, and from the three annular portions 14, 15, 16 protrude inwardly in the direction of the axis A.
  • the housing 13 is made of an electrically conductive material and is electrically grounded.
  • the housing 13 is surrounded by three current transformer cores 18, which rotate the housing 13 approximately coaxial with the axis A, and in the direction of the axis A are arranged side by side.
  • the current transformer cores 18 are covered by a shielding plate 19.
  • a disc-shaped insulating member 21 is held, which has a circular opening 22 approximately centrally and thus approximately coaxial with the axis A.
  • the insulating part 21 may have off-center openings for the purpose of replacing insulating gas.
  • a first connecting piece 24 is held, which consists of an electrically conductive material. The first connector 24 is accessible from the outside at the end face S1 of the three-position switch 10.
  • the first connector 24 has a cylindrical portion 25 and a mushroom-shaped portion 26. Both sections 25, 26 are aligned approximately coaxially to the axis A.
  • the cylindrical portion 25 is accessible from the outside at the end face S1 and has a bore 27 approximately coaxial with the bore 27, which is provided so that an electrical conductor can be inserted therein from the outside.
  • the electrical conductor is in particular a rod.
  • the bore 27 of the section 25 is accessible for this purpose from the outside.
  • the mushroom-shaped portion 26 is located in the interior of the three-position switch 10 and has a to the axis A. coaxial bore 28, whose purpose will be explained.
  • a ring 29 is attached from the outside to the cylindrical portion 25.
  • a disc-shaped insulating member 31 is held, which has a circular opening 32 approximately centrally and thus approximately coaxial with the axis A.
  • the insulating member 31 may have off-center openings for the purpose of exchanging insulating gas.
  • a second connecting piece 34 is held, which consists of an electrically conductive material. The second connector 34 is accessible from the outside at the front side S2 of the three-position switch 10.
  • the second connecting piece 34 is formed pin-shaped or tubular and is approximately coaxially aligned with the axis A. In the interior of the three-position switch 10, the diameter of the second connecting piece 34 is substantially constant.
  • the second connecting piece 34 is provided with two projecting rings 35, 36.
  • the second connecting piece 34 projects outward on the end face S2 out of the housing 13 of the three-position switch 10. There, the second connector 34 can be connected from the outside with an electrical conductor.
  • the electric Ladder may in particular be a cylindrical component.
  • a cylindrical sleeve 38 is slidably disposed in the interior of the three-position switch 10.
  • the sleeve 34 is made of an electrically conductive material.
  • the sleeve 34 can be pushed back and forth in the direction of the axis A on the second connector 34.
  • the sleeve 38 thus represents a displaceable contact part along an axis.
  • the inner diameter of the sleeve 38 and the outer diameter of the second connecting piece 34 are matched to one another such that in each sliding position, an electrical connection between the second connector 34 and the sleeve 38 is present. Furthermore, the sleeve 38 and the mushroom-shaped portion 26 of the first connector 24 are matched to each other, as will be explained.
  • the sleeve 38 In the area of that free end of the sleeve 38, which faces the first connector 24, the sleeve 38 is provided with a disk-shaped plate 39. This plate 39 is approximately transversely to the axis A of the sleeve 38 and protrudes into the interior of the three-position switch 10th
  • the plate 39 is made of an electrically conductive material.
  • a rod 41 is pivotally mounted on the sleeve 38, which is connected via a pivotally hinged lever 42 with a rotatable shaft 43.
  • the rod 41 and / or the lever 42 are made of an electrically insulating material.
  • the shaft 43 is mounted in the housing 13 approximately transversely to the axis A and guided in a manner not shown by the housing 13 through to the outside. By a corresponding rotational movement of the shaft 43, the sleeve 38 can be moved over the rod 41 and the lever 42 on the second connecting piece 34 in the direction of the axis A back and forth.
  • the rod 41 and the lever 42 are arranged behind the plate 39.
  • the plate 39 can thus be used for electrical shielding of the rod 41 and the lever 42.
  • the electric field in the interior of the three-position switch 10 can be influenced by the spatial arrangement and design of the plate 39.
  • a transmission can be provided.
  • at least one component of the transmission consists of an electrically insulating material.
  • the transmission or at least a part thereof on the side facing away from the first connector 24 side of the plate 39 is arranged.
  • a gear transmission is provided, in which a gear is mounted on the shaft 43 and a rack is coupled to the sleeve 38, wherein the gear and the rack engage with each other.
  • a contact ring 45 is arranged, which consists of an electrically conductive material and is electrically connected to the housing 13.
  • the disc-shaped portion 15 projecting inwardly from the housing 13 and the disc-shaped plate 39 projecting outward from the sleeve 38 are adapted to one another such that - provided the plate 39 is arranged in the region of the portion 15 - an electrical connection between the sleeve 38 via the plate 39 and the contact ring 45 to the portion 15 of the three-position switch 10 is present.
  • FIG. 1 a grounded position of the three-position switch 10 is shown.
  • the second connector 34 is thus at the same electrical potential as the housing 13 and is grounded to it ,
  • the first connector 24 has no electrical connection to the second connector 34 and is also not grounded.
  • FIG. 2 a separate position of the three-position switch 10 is shown.
  • the plate 39 has no electrical connection with the contact ring 45, so that the second connector 34 is no longer connected to the housing 13.
  • the second connector 34 is thus no longer grounded.
  • the first connector 24 also has no electrical connection to the second connector 34 and is also not grounded.
  • FIG. 3 a closed position of the three-position switch 10 is shown.
  • the free end of the sleeve 38 is immersed in the bore 28 of the mushroom-shaped portion 26 of the first fitting 24.
  • the outer diameter of the sleeve 38 is matched to the inner diameter of the bore 28 of the mushroom-shaped portion 26 of the first connector 24, that in the immersed state, an electrical connection between the sleeve 38 and the first connector 24 is present.
  • connection piece on the first end face S1 as a cylindrical pin and / or the connection piece on the second end face S2 is formed as a cylindrical bore.
  • the entire three-position switch 10 not only in the in the FIGS. 1 to 3 shown position can be installed in a medium or high voltage switchgear, but also vice versa, so rotated by 180 degrees.

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  • Coupling Device And Connection With Printed Circuit (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Patch Boards (AREA)

Description

Die Erfindung betrifft einen Dreistellungsschalter insbesondere für eine Mittel- oder Hochspannungsschaltanlage, mit den Merkmalen des Oberbegriffs des Anspruchs 1.The invention relates to a three-position switch, in particular for a medium or high voltage switchgear, with the features of the preamble of claim 1.

Ein derartiger Dreistellungsschalter ist aus DE 2 037 234 A1 bekannt.Such a three-position switch is off DE 2 037 234 A1 known.

Ein nicht gattungsgemäßer Dreistellungsschalter ist beispielsweise aus der EP 1 128 509 A1 bekannt. Dabei handelt es sich um einen gas-isolierten Schalter, bei dem die beiden Anschlussstücke am Umfang des Gehäuses von außen zugänglich und somit die jeweils zugehörigen elektrischen Leiter dort anschließbar sind.A non-generic three-position switch is for example from the EP 1 128 509 A1 known. This is a gas-insulated switch, in which the two connecting pieces on the circumference of the housing accessible from the outside and thus the respectively associated electrical conductors are connected there.

Aufgabe der Erfindung ist es, einen Dreistellungsschalter zu schaffen, der zur Verminderung des erforderlichen Bauraums beiträgt.The object of the invention is to provide a three-position switch, which contributes to the reduction of the required space.

Diese Aufgabe wird bei einem Dreistellungsschalter der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass das verschiebliche Kontaktteil als Hülse ausgebildet ist, die auf dem stift- oder rohrförmigen zweiten Anschlussstück hin und her herschiebbar ist.This object is achieved according to the invention in a three-position switch of the type mentioned, that the displaceable contact part is formed as a sleeve which is pushed back and forth on the pin or tubular second connector.

Auf diese Weise wird eine Führung des Kontaktteils auf dem zweiten Anschlussstück realisiert, die eine hohe Funktionssicherheit bei gleichzeitig geringem Bauaufwand besitzt.In this way, a guide of the contact part is realized on the second connector, which has a high reliability with low construction costs.

Der Dreistellungsschalter kann damit zusammen mit einem weiteren Schaltgerät, z.B. einem Leistungsschalter, komplett montiert und werksseitig geprüft werden, um dann aufgrund der Kompaktheit der gesamten Anordnung als komplettes Gerät zum Einsatzort transportiert zu werden.The three-position switch can thus be used together with another switching device, e.g. a circuit breaker, fully assembled and factory tested, and then to be transported as a complete device to the site due to the compactness of the entire arrangement.

Durch die erfindungsgemäße Anordnung der beiden Anschlussstücke wird weiterhin erreicht, dass am Umfang des Gehäuses keine Bauteile des Dreistellungsschalters vorhanden sind oder zugänglich sein müssen. Daraus ergibt sich der Vorteil, dass am Umfang des Dreistellungsschalters andere Komponenten der elektrischen Schaltanlage angeordnet werden können. Dies führt zu einer weiteren Verminderung des insgesamt erforderlichen Bauraums.The inventive arrangement of the two connecting pieces is further achieved that no components of the three-position switch are present or must be accessible at the periphery of the housing. This results in the advantage that other components of the electrical switchgear can be arranged on the circumference of the three-position switch. This leads to a further reduction of the total required space.

Besonders vorteilhaft ist es, wenn am Umfang des Gehäuses des Dreistellungsschalters mindestens ein Stromwandlerkern angeordnet ist. Dies bedeutet, dass der Dreistellungsschalter innerhalb des Stromwandlerkerns integriert ist. Insgesamt hat diese Bauform einen wesentlich geringeren Raumbedarf als es die Stromwandlerkerne und der Dreistellungsschalter in separater Bauweise erfordern.It is particularly advantageous if at least one current transformer core is arranged on the circumference of the housing of the three-position switch. This means that the Three-position switch is integrated within the current transformer core. Overall, this design has a much smaller footprint than the current transformer cores and the three-position switch in a separate design require.

Bei einer vorteilhaften Weiterbildung der Erfindung weist das erste Anschlussstück einen Abschnitt auf, der mit einer Bohrung versehen ist, die an der ersten Stirnseite von außen zugänglich ist, und in die der elektrische Leiter von außen einsteckbar ist. Damit kann die erfindungsgemäße Verbindbarkeit des ersten Anschlussstücks und des elektrischen Leiters an der ersten Stirnseite in einfacher Weise realisiert werden. Es versteht sich, dass die Bohrung etwa koaxial mit der Achse, aber auch außermittig an der Stirnseite angeordnet sein kann.In an advantageous embodiment of the invention, the first connection piece has a portion which is provided with a bore which is accessible from the outside at the first end side, and in which the electrical conductor can be inserted from the outside. Thus, the connectability of the first connector and the electrical conductor according to the invention can be realized on the first end side in a simple manner. It is understood that the bore can be arranged approximately coaxially with the axis, but also off-center on the front side.

Bei einer anderen vorteilhaften Weiterbildung der Erfindung ragt das zweite Anschlussstück an der zweiten Stirnseite nach außen heraus und es ist dort der elektrische Leiter von außen anschließbar. Dies stellt ebenfalls eine einfache Realisierung der erfindungsgemäßen Verbindbarkeit des zweiten Anschlussstücks und des elektrischen Leiters an der zweiten Stirnseite dar. Auch hier ist es möglich, dass die Verbindung etwa koaxial zu der Achse oder außermittig vorgesehen ist.In another advantageous development of the invention, the second connection piece protrudes outwards on the second end face and the electrical conductor can be connected from the outside there. This likewise represents a simple realization of the connectability according to the invention of the second connection piece and of the electrical conductor on the second end face. Here, too, it is possible that the connection is provided approximately coaxially to the axis or off-center.

Bei einer Ausgestaltung der Erfindung weist das erste Anschlussstück einen dem zweiten Anschlussstück zugewandten Abschnitt auf, der mit einer Bohrung versehen ist, deren Innendurchmesser an den Außendurchmesser der Hülse angepasst ist. Damit ist es in besonders vorteilhafter Weise möglich, das erste und das zweite Anschlussstück über die Hülse elektrisch miteinander zu verbinden.In one embodiment of the invention, the first connector has a second connector facing portion which is provided with a bore whose inner diameter is adapted to the outer diameter of the sleeve. This makes it possible in a particularly advantageous manner, electrically connect the first and the second connector via the sleeve with each other.

Bei einer vorteilhaften Weiterbildung der Erfindung ist das verschiebliche Kontaktteil mit einem Teller verbunden, der etwa quer zu der Achse von dem Kontaktteil absteht. Mit Hilfe dieses Tellers ist es möglich, das elektrische Feld im Innenraum des Dreistellungsschalters zu beeinflussen. Dies kann dazu verwendet werden, den erfindungsgemäßen Dreistellungsschalter noch kompakter auszugestalten.In an advantageous embodiment of the invention, the displaceable contact part is connected to a plate which projects approximately transversely to the axis of the contact part. With the help of this plate, it is possible to influence the electric field in the interior of the three-position switch. This can be used to make the three-position switch according to the invention even more compact.

Besonders vorteilhaft ist es, wenn das Gehäuse einen nach innen ragenden Abschnitt aufweist, dessen Innendurchmesser an den Außendurchmesser des Tellers angepasst ist. Damit ist es möglich, den Teller als elektrisches Verbindungsglied bei der Erdung des zweiten Anschlussstücks zu verwenden. Der Teller hat damit eine Doppelfunktion, nämlich zur Feldbeeinflussung und zur Erdung.It when the housing has an inwardly projecting portion whose inner diameter is adapted to the outer diameter of the plate is particularly advantageous. This makes it possible to use the plate as an electrical connector in the grounding of the second connector. The plate thus has a double function, namely for field control and grounding.

Weiterhin ist es besonders vorteilhaft, wenn das verschiebliche Kontaktteil über ein Getriebe, insbesondere einen Hebel hin- und herbewegbar ist, und wenn das Getriebe, insbesondere der Hebel auf der dem ersten Anschlussstück abgewandten Seite des Tellers angeordnet ist. Auf diese Weise kann der Teller zur elektrischen Abschirmung des Hebels herangezogen werden.Furthermore, it is particularly advantageous if the displaceable contact part via a transmission, in particular a lever is movable back and forth, and when the transmission, in particular the lever is arranged on the side facing away from the first connecting piece of the plate. In this way, the plate can be used for electrical shielding of the lever.

Weitere Merkmale, Anwendungsmöglichkeiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung, die in den Figuren der Zeichnung dargestellt sind. Dabei bilden alle beschriebenen oder dargestellten Merkmale für sich oder in beliebiger Kombination den Gegenstand der Erfindung, unabhängig von ihrer Zusammenfassung in den Patentansprüchen oder deren Rückbeziehung sowie unabhängig von ihrer Formulierung bzw. Darstellung in der Beschreibung bzw. in der Zeichnung.Other features, applications and advantages of the invention will become apparent from the following description of embodiments of the invention, which are illustrated in the figures of the drawing. All described or illustrated features, alone or in any combination form the subject matter of the invention, regardless of their summary in the claims or their dependency and regardless of their formulation or representation in the description or in the drawing.

Figur 1 zeigt eine schematische Schnittdarstellung eines Ausführungsbeispiels eines erfindungsgemäßen Dreistellungsschalters in einer geerdeten Stellung, Figur 2 zeigt eine schematische Schnittdarstellung des Dreistellungsschalters der Figur 1 in einer getrennten Stellung, und Figur 3 zeigt eine schematische Schnittdarstellung des Dreistellungsschalters der Figur 1 in einer geschlossenen Stellung. FIG. 1 shows a schematic sectional view of an embodiment of a three-position switch according to the invention in a grounded position, FIG. 2 shows a schematic sectional view of the three-position switch of FIG. 1 in a separate position, and FIG. 3 shows a schematic sectional view of the three-position switch of FIG. 1 in a closed position.

In den Figuren 1 bis 3 ist ein Dreistellungsschalter 10 einer Mittel- oder Hochspannungsschaltanlage dargestellt. Der Dreistellungsschalter 10 ist vorzugsweise zum Einbau in eine luftisolierte Schaltanlage (AIS = air-insulated switchgear) oder eine sogenannte Compact Switchgear Assembly oder einen sogenannten Dead-Tank Schalter vorgesehen. Darüber hinaus ist der Dreistellungsschalter 10 auch in einer gasisolierten Schaltanlage (GIS = gasinsulated switchgear) einsetzbar.In the FIGS. 1 to 3 is a three-position switch 10 of a medium or high voltage switchgear shown. The three-position switch 10 is preferably provided for installation in an air-insulated switchgear (AIS = air-insulated switchgear) or a so-called compact switchgear assembly or a so-called dead-tank switch. In addition, the three-position switch 10 can also be used in a gas-insulated switchgear (GIS = gas-insulated switchgear).

Der Dreistellungsschalter 10 der Figuren 1 bis 3 ist weitgehend rotationssymmetrisch ausgebildet und weist eine Achse A auf. Etwa quer zu der Achse A weist der Dreistellungsschalter 10 eine erste Stirnseite S1 und eine zweite Stirnseite S2 auf.The three-position switch 10 of FIGS. 1 to 3 is largely rotationally symmetrical and has an axis A. Approximately transversely to the axis A, the three-position switch 10 has a first end face S1 and a second end face S2.

Der Dreistellungsschalter 10 weist ein Gehäuse 13 auf, das im wesentlichen zylinderförmig ausgebildet ist, und von dem drei kreisringartige Abschnitte 14, 15, 16 nach innen in Richtung zu der Achse A abstehen. Das Gehäuse 13 besteht aus einem elektrisch leitenden Material und ist elektrisch geerdet.The three-position switch 10 has a housing 13 which is formed substantially cylindrical, and from the three annular portions 14, 15, 16 protrude inwardly in the direction of the axis A. The housing 13 is made of an electrically conductive material and is electrically grounded.

Außen an seinem Umfang ist das Gehäuse 13 von drei Stromwandlerkernen 18 umgeben, die das Gehäuse 13 etwa koaxial zur Achse A umlaufen, und die in Richtung der Achse A nebeneinander angeordnet sind. An ihrer Außenseite sind die Stromwandlerkerne 18 von einem Abschirmblech 19 abgedeckt.Outside at its periphery, the housing 13 is surrounded by three current transformer cores 18, which rotate the housing 13 approximately coaxial with the axis A, and in the direction of the axis A are arranged side by side. On its outer side, the current transformer cores 18 are covered by a shielding plate 19.

An dem Abschnitt 14 des Gehäuses 13 ist ein scheibenförmiges Isolierteil 21 gehalten, das etwa mittig und damit etwa koaxial zur Achse A eine kreisförmige Öffnung 22 aufweist. Das Isolierteil 21 kann außermittig weitere Öffnungen zum Zwecke des Austausches von Isoliergas aufweisen. In der Öffnung 22 ist ein erstes Anschlussstück 24 gehalten, das aus einem elektrisch leitenden Material besteht. Das erste Anschlussstück 24 ist an der Stirnseite S1 des Dreistellungsschalters 10 von außen zugänglich.At the portion 14 of the housing 13, a disc-shaped insulating member 21 is held, which has a circular opening 22 approximately centrally and thus approximately coaxial with the axis A. The insulating part 21 may have off-center openings for the purpose of replacing insulating gas. In the opening 22, a first connecting piece 24 is held, which consists of an electrically conductive material. The first connector 24 is accessible from the outside at the end face S1 of the three-position switch 10.

Das erste Anschlussstück 24 weist einen zylinderförmigen Abschnitt 25 und einen pilzförmigen Abschnitt 26 auf. Beide Abschnitte 25, 26 sind etwa koaxial zur Achse A ausgerichtet. Der zylinderförmige Abschnitt 25 ist an der Stirnseite S1 von außen zugänglich und weist eine zur Achse A etwa koaxiale Bohrung 27 auf, die dazu vorgesehen ist, dass ein elektrischer Leiter darin von außen eingesteckt werden kann. Bei dem elektrischen Leiter handelt es sich dabei insbesondere um eine Stange. Die Bohrung 27 des Abschnitts 25 ist zu diesem Zweck von außen zugänglich. Der pilzförmige Abschnitt 26 befindet sich im Innenraum des Dreistellungsschalters 10 und weist eine zur Achse A koaxiale Bohrung 28 auf, deren Zweck noch erläutert werden wird. Zur Halterung des ersten Anschlussstücks 24 in dem Isolierteil 21 ist ein Ring 29 von außen auf den zylinderförmigen Abschnitt 25 aufgesteckt.The first connector 24 has a cylindrical portion 25 and a mushroom-shaped portion 26. Both sections 25, 26 are aligned approximately coaxially to the axis A. The cylindrical portion 25 is accessible from the outside at the end face S1 and has a bore 27 approximately coaxial with the bore 27, which is provided so that an electrical conductor can be inserted therein from the outside. The electrical conductor is in particular a rod. The bore 27 of the section 25 is accessible for this purpose from the outside. The mushroom-shaped portion 26 is located in the interior of the three-position switch 10 and has a to the axis A. coaxial bore 28, whose purpose will be explained. For holding the first connection piece 24 in the insulating part 21, a ring 29 is attached from the outside to the cylindrical portion 25.

An dem Abschnitt 16 des Gehäuses 13 ist ein scheibenförmiges Isolierteil 31 gehalten, das etwa mittig und damit etwa koaxial zur Achse A eine kreisförmige Öffnung 32 aufweist. Das Isolierteil 31 kann außermittig weitere Öffnungen zum Zwecke des Austausches von Isoliergas aufweisen. In der Öffnung 32 ist ein zweites Anschlussstück 34 gehalten, das aus einem elektrisch leitenden Material besteht. Das zweite Anschlussstück 34 ist an der Stirnseite S2 des Dreistellungsschalters 10 von außen zugänglich.At the portion 16 of the housing 13, a disc-shaped insulating member 31 is held, which has a circular opening 32 approximately centrally and thus approximately coaxial with the axis A. The insulating member 31 may have off-center openings for the purpose of exchanging insulating gas. In the opening 32, a second connecting piece 34 is held, which consists of an electrically conductive material. The second connector 34 is accessible from the outside at the front side S2 of the three-position switch 10.

Das zweite Anschlussstück 34 ist stift- oder rohrförmig ausgebildet und ist etwa koaxial zur Achse A ausgerichtet. Im Innenraum des Dreistellungsschalters 10 ist der Durchmesser des zweiten Anschlussstücks 34 im wesentlichen gleichbleibend. Zur Halterung des zweiten Anschlussstücks 34 in dem Isolierteil 31 ist das zweite Anschlussstück 34 mit zwei vorstehenden Ringen 35, 36 versehen. Das zweite Anschlussstück 34 ragt an der Stirnseite S2 nach außen aus dem Gehäuse 13 des Dreistellungsschalters 10 heraus. Dort kann das zweite Anschlussstück 34 von außen mit einem elektrischen Leiter verbunden werden. Bei dem elektrischen Leiter kann es sich insbesondere um ein zylinderförmiges Bauteil handeln.The second connecting piece 34 is formed pin-shaped or tubular and is approximately coaxially aligned with the axis A. In the interior of the three-position switch 10, the diameter of the second connecting piece 34 is substantially constant. For holding the second connecting piece 34 in the insulating part 31, the second connecting piece 34 is provided with two projecting rings 35, 36. The second connecting piece 34 projects outward on the end face S2 out of the housing 13 of the three-position switch 10. There, the second connector 34 can be connected from the outside with an electrical conductor. In the electric Ladder may in particular be a cylindrical component.

Auf dem stift- oder rohrförmigen zweiten Anschlussstück 34 ist im Innenraum des Dreistellungsschalters 10 eine zylinderförmige Hülse 38 verschiebbar angeordnet. Die Hülse 34 besteht aus einem elektrisch leitenden Material. Die Hülse 34 kann in Richtung der Achse A auf dem zweiten Anschlussstück 34 hin- und hergeschoben werden. Die Hülse 38 stellt damit ein entlang einer Achse verschiebliches Kontaktteil dar.On the pin or tubular second connector 34, a cylindrical sleeve 38 is slidably disposed in the interior of the three-position switch 10. The sleeve 34 is made of an electrically conductive material. The sleeve 34 can be pushed back and forth in the direction of the axis A on the second connector 34. The sleeve 38 thus represents a displaceable contact part along an axis.

Der Innendurchmesser der Hülse 38 und der Außendurchmesser des zweiten Anschlussstücks 34 sind derart aufeinander abgestimmt, dass in jeder Schiebestellung eine elektrische Verbindung zwischen dem zweiten Anschlussstück 34 und der Hülse 38 vorhanden ist. Weiterhin sind die Hülse 38 und der pilzförmige Abschnitt 26 des ersten Anschlussstücks 24 aufeinander abgestimmt, wie dies noch erläutert werden wird.The inner diameter of the sleeve 38 and the outer diameter of the second connecting piece 34 are matched to one another such that in each sliding position, an electrical connection between the second connector 34 and the sleeve 38 is present. Furthermore, the sleeve 38 and the mushroom-shaped portion 26 of the first connector 24 are matched to each other, as will be explained.

Im Bereich desjenigen freien Endes der Hülse 38, das dem ersten Anschlussstück 24 zugewandt ist, ist die Hülse 38 mit einem scheibenförmigen Teller 39 versehen. Dieser Teller 39 steht etwa quer zur Achse A von der Hülse 38 ab und ragt in den Innenraum des Dreistellungsschalters 10.In the area of that free end of the sleeve 38, which faces the first connector 24, the sleeve 38 is provided with a disk-shaped plate 39. This plate 39 is approximately transversely to the axis A of the sleeve 38 and protrudes into the interior of the three-position switch 10th

Der Teller 39 besteht aus einem elektrisch leitenden Material.The plate 39 is made of an electrically conductive material.

Im Bereich desjenigen freien Endes der Hülse 38, das von dem ersten Anschlussstück 24 abgewandt ist, ist an der Hülse 38 eine Stange 41 schwenkbar angebracht, die über einen schwenkbar angelenkten Hebel 42 mit einer drehbaren Welle 43 verbunden ist. Die Stange 41 und/oder der Hebel 42 sind aus einem elektrisch isolierenden Material hergestellt. Die Welle 43 ist in dem Gehäuse 13 etwa quer zur Achse A gelagert und in nicht-dargestellter Weise durch das Gehäuse 13 hindurch nach außen geführt. Durch eine entsprechende Drehbewegung der Welle 43 kann die Hülse 38 über die Stange 41 und den Hebel 42 auf dem zweiten Anschlussstück 34 in Richtung der Achse A hin- und her verschoben werden.In the area of that free end of the sleeve 38, which faces away from the first connector 24, a rod 41 is pivotally mounted on the sleeve 38, which is connected via a pivotally hinged lever 42 with a rotatable shaft 43. The rod 41 and / or the lever 42 are made of an electrically insulating material. The shaft 43 is mounted in the housing 13 approximately transversely to the axis A and guided in a manner not shown by the housing 13 through to the outside. By a corresponding rotational movement of the shaft 43, the sleeve 38 can be moved over the rod 41 and the lever 42 on the second connecting piece 34 in the direction of the axis A back and forth.

Im Hinblick auf das erste Anschlussstück 24 sind die Stange 41 und der Hebel 42 hinter dem Teller 39 angeordnet. Der Teller 39 kann damit zur elektrische Abschirmung der Stange 41 und des Hebels 42 herangezogen werden. Weiterhin kann durch die räumliche Anordnung und Ausbildung des Tellers 39 das elektrische Feld im Innenraum des Dreistellungsschalters 10 beeinflusst werden.With regard to the first connection piece 24, the rod 41 and the lever 42 are arranged behind the plate 39. The plate 39 can thus be used for electrical shielding of the rod 41 and the lever 42. Furthermore, the electric field in the interior of the three-position switch 10 can be influenced by the spatial arrangement and design of the plate 39.

Es versteht sich, dass anstelle der Stange 41 und des Hebels 42 ganz allgemein ein Getriebe vorgesehen sein kann. In diesem Fall besteht zumindest ein Bauteil des Getriebes aus einem elektrisch isolierenden Material. Weiterhin ist das Getriebe oder zumindest ein Teil davon auf der dem ersten Anschlussstück 24 abgewandten Seite des Tellers 39 angeordnet. Beispielsweise ist es möglich, dass ein Zahnradgetriebe vorgesehen ist, bei dem ein Zahnrad auf die Welle 43 aufgesteckt ist und eine Zahnstange mit der Hülse 38 gekoppelt ist, wobei das Zahnrad und die Zahnstange ineinander eingreifen.It is understood that instead of the rod 41 and the lever 42 quite generally a transmission can be provided. In this case, at least one component of the transmission consists of an electrically insulating material. Furthermore, the transmission or at least a part thereof on the side facing away from the first connector 24 side of the plate 39 is arranged. For example, it is possible that a gear transmission is provided, in which a gear is mounted on the shaft 43 and a rack is coupled to the sleeve 38, wherein the gear and the rack engage with each other.

An dem freien Ende des Abschnitts 15 des Gehäuses 13 ist ein Kontaktring 45 angeordnet, der aus einem elektrisch leitenden Material besteht und elektrisch mit dem Gehäuse 13 verbunden ist. Der von dem Gehäuse 13 nach innen abstehende scheibenförmige Abschnitt 15 und der von der Hülse 38 nach außen abstehende scheibenförmige Teller 39 sind derart aneinander angepasst, dass - sofern der Teller 39 im Bereich des Abschnitts 15 angeordnet ist - eine elektrische Verbindung zwischen der Hülse 38 über den Teller 39 und über den Kontaktring 45 zu dem Abschnitt 15 des Dreistellungsschalters 10 vorhanden ist.At the free end of the portion 15 of the housing 13, a contact ring 45 is arranged, which consists of an electrically conductive material and is electrically connected to the housing 13. The disc-shaped portion 15 projecting inwardly from the housing 13 and the disc-shaped plate 39 projecting outward from the sleeve 38 are adapted to one another such that - provided the plate 39 is arranged in the region of the portion 15 - an electrical connection between the sleeve 38 via the plate 39 and the contact ring 45 to the portion 15 of the three-position switch 10 is present.

In der Figur 1 ist eine geerdete Stellung des Dreistellungsschalters 10 dargestellt. Es besteht eine elektrisch leitende Verbindung von dem zweiten Anschlussstück 34 über die Hülse 38, über den Teller 39 und über den Kontaktring 45 zu dem Abschnitt 15 des geerdeten Gehäuses 13. Das zweite Anschlussstück 34 befindet sich damit auf demselben elektrischen Potential wie das Gehäuse 13 und ist damit geerdet. Das erste Anschlussstück 24 besitzt keine elektrische Verbindung zu dem zweiten Anschlussstück 34 und ist ebenfalls nicht geerdet.In the FIG. 1 a grounded position of the three-position switch 10 is shown. There is one electrically conductive connection from the second connector 34 via the sleeve 38, over the plate 39 and via the contact ring 45 to the portion 15 of the grounded housing 13. The second connector 34 is thus at the same electrical potential as the housing 13 and is grounded to it , The first connector 24 has no electrical connection to the second connector 34 and is also not grounded.

Wird nunmehr die Welle 43 in eine Drehbewegung versetzt, so wird die Hülse 38 auf dem zweiten Anschlussstück 34 in Richtung zu dem ersten Anschlussstück 24 verschoben. Die Hülse 38 geht dann von der Stellung der Figur 1 in die Stellung der Figur 2 über.If now the shaft 43 is set in a rotational movement, then the sleeve 38 is displaced on the second connecting piece 34 in the direction of the first connecting piece 24. The sleeve 38 then goes from the position of FIG. 1 in the position of FIG. 2 above.

In der Figur 2 ist eine getrennte Stellung des Dreistellungsschalters 10 dargestellt. Der Teller 39 hat keine elektrische Verbindung mehr mit dem Kontaktring 45, so dass das zweite Anschlussstück 34 nicht mehr mit dem Gehäuse 13 verbunden ist. Das zweite Anschlussstück 34 ist damit nicht mehr geerdet. Das erste Anschlussstück 24 besitzt weiterhin keine elektrische Verbindung zu dem zweiten Anschlussstück 34 und ist ebenfalls nicht geerdet.In the FIG. 2 a separate position of the three-position switch 10 is shown. The plate 39 has no electrical connection with the contact ring 45, so that the second connector 34 is no longer connected to the housing 13. The second connector 34 is thus no longer grounded. The first connector 24 also has no electrical connection to the second connector 34 and is also not grounded.

Wird nunmehr die Welle 43 in eine weitere Drehbewegung versetzt, so wird die Hülse 38 auf dem zweiten Anschlussstück 34 weiter in Richtung zu dem ersten Anschlussstück 24 verschoben. Die Hülse geht dann von der Stellung der Figur 2 in die Stellung der Figur 3 über.Now, if the shaft 43 is set in a further rotational movement, the sleeve 38 is on the second Connector 34 is further displaced toward the first connector 24. The sleeve then goes from the position of FIG. 2 in the position of FIG. 3 above.

In der Figur 3 ist eine geschlossene Stellung des Dreistellungsschalters 10 dargestellt. Das freie Ende der Hülse 38 ist in die Bohrung 28 des pilzförmigen Abschnitts 26 des ersten Anschlussstücks 24 eingetaucht. Dabei ist der Außendurchmesser der Hülse 38 derart auf den Innendurchmesser der Bohrung 28 des pilzförmigen Abschnitts 26 des ersten Anschlussstücks 24 abgestimmt, dass im eingetauchten Zustand eine elektrische Verbindung zwischen der Hülse 38 und dem ersten Anschlussstück 24 vorhanden ist. Damit besteht eine elektrische Verbindung von dem ersten Anschlussstück 24 über den pilzförmigen Abschnitt 26 und die Hülse 38 zu dem zweiten Anschlussstück 34. Beide Anschlussstücke 24, 34 sind in dieser geschlossenen Stellung vom Gehäuse 13 des Dreistellungsschalters 10 getrennt und damit nicht geerdet.In the FIG. 3 a closed position of the three-position switch 10 is shown. The free end of the sleeve 38 is immersed in the bore 28 of the mushroom-shaped portion 26 of the first fitting 24. In this case, the outer diameter of the sleeve 38 is matched to the inner diameter of the bore 28 of the mushroom-shaped portion 26 of the first connector 24, that in the immersed state, an electrical connection between the sleeve 38 and the first connector 24 is present. Thus, there is an electrical connection from the first connector 24 via the mushroom-shaped portion 26 and the sleeve 38 to the second connector 34. Both connectors 24, 34 are separated in this closed position from the housing 13 of the three-position switch 10 and thus not grounded.

Die Ausbildung der beiden Anschlussstücke 24, 34 in den Figuren 1 bis 3 ist beispielhaft zu verstehen. Es versteht sich, dass die Anschlussstücke 24, 34 auch andersartig ausgestaltet sein können. Insbesondere ist es möglich, dass das Anschlussstück auf der ersten Stirnseite S1 als zylindrischer Stift und/oder das Anschlussstück auf der zweiten Stirnseite S2 als zylindrische Bohrung ausgebildet ist. Damit ist es möglich, dass der gesamte Dreistellungsschalter 10 nicht nur in der in den Figuren 1 bis 3 dargestellten Stellung in eine Mittel- oder Hochspannungsschaltanlage eingebaut werden kann, sondern auch umgekehrt, also um 180 Grad gedreht.The formation of the two connecting pieces 24, 34 in the FIGS. 1 to 3 is to be understood as an example. It is understood that the connecting pieces 24, 34 can also be configured differently. In particular, it is possible that the connection piece on the first end face S1 as a cylindrical pin and / or the connection piece on the second end face S2 is formed as a cylindrical bore. Thus, it is possible that the entire three-position switch 10 not only in the in the FIGS. 1 to 3 shown position can be installed in a medium or high voltage switchgear, but also vice versa, so rotated by 180 degrees.

Claims (11)

  1. A three-position switch (10), in particular for middle- or high-voltage switchgear, having an electrically grounded housing (13) which has a first and a second face end (S1, S2), having a first and a second connection piece (24, 34) to each of which an electrical conductor is connectable from outside, and having a contact piece, displaceable along an axis (A), with which contact piece either one of the two connection pieces (24, 34) is electrically connectable to the housing (13) or neither of the two connection pieces (24, 34) is electrically connectable to the housing (13), or both connection pieces (24, 34) are electrically connectable to one another, and the face ends (S1, S2) are disposed approximately transversely to the axis (A), and the first connection piece (24) on the first face end (S1) and the second connection piece (34) on the second face end (S2) are connectable to the electrical conductor, and the second connection piece (34) is embodied as pinlike or tubular, characterized in that the displaceable contact piece is embodied as a sleeve (38), which is displaceable back and forth on the pinlike or tubular second connection piece (34).
  2. The three-position switch (10) according to claim 1, characterized in that the first connection piece (24) has a portion (25) that is provided with a bore (27) which is accessible from outside on the first face end (S1), and into which the electrical conductor is insertable from outside.
  3. The three-position switch (10) according to one of claims 1 or 2, characterized in that the second connection piece (34) on the second face end (S2) protrudes to the outside, and the electrical conductor is connectable there from outside.
  4. The three-position switch (10) according to one of the foregoing claims, characterized in that the first and the second connection piece (24, 34) on the first and the second face end (S1, S2) are each retained in the housing (13) by a respective insulating part (21, 31).
  5. The three-position switch (10) according to one of the foregoing claims, characterized in that the first connection piece (24) has a portion (26) facing toward the second connection piece (34), which portion is provided with a bore (28) whose inside diameter is adapted to the outside diameter of the sleeve (38).
  6. The three-position switch (10) according to one of the foregoing claims, characterized in that first and the second connection piece (24, 34) are connectable electrically to one another via the sleeve (38).
  7. The three-position switch (10) according to one of the foregoing claims, characterized in that the displaceable contact piece is connected to a plate (39) which protrudes from the contact piece approximately transversely to the axis (A).
  8. The three-position switch (10) according to claim 7, characterized in that the housing (13) has an inward-protruding portion (15) whose inside diameter is adapted to the outside diameter of the plate (39).
  9. The three-position switch (10) according to claim 8, characterized in that the displaceable contact piece is movable back and forth via a gear, in particular a lever (42), and that the gear, in particular the lever (42), is disposed on the side of the plate (39) facing away from the first connection piece (24).
  10. The three-position switch (10) according to one of claims 7-9, characterized in that the second connection piece (34) is electrically connectable to the housing (13) via the plate (39).
  11. The three-position switch (10) according to one of the foregoing claims, characterized in that at least one current transformer core (18) is disposed on the circumference of the housing (13).
EP20060025171 2006-04-12 2006-12-06 Three-position switch in particular for middle- or high voltage switchgear Active EP1845540B1 (en)

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DE200610017131 DE102006017131A1 (en) 2006-04-12 2006-04-12 Three-position switch, in particular for a medium or high-voltage switchgear

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EP2467865B1 (en) * 2009-08-20 2014-07-16 Siemens Aktiengesellschaft Disconnector for switchgear
CN102184793B (en) * 2011-04-21 2014-02-12 西安新锐电力设备有限公司 Isolating switch
CN103377849B (en) * 2012-04-28 2016-08-17 西门子公司 Three-phase combined type isolation earthing switch
FR3003097B1 (en) * 2013-03-05 2015-04-17 Alstom Technology Ltd FITTING CAP HOOD DRIVE SYSTEM FOR A HIGH VOLTAGE GROUNDING DEVICE
FR3003096B1 (en) * 2013-03-05 2015-04-17 Alstom Technology Ltd SPEED HOOD DRIVE SYSTEM FOR A HIGH VOLTAGE GROUNDING DEVICE
CN104865505B (en) * 2015-04-30 2018-03-06 广州白云电器设备股份有限公司 A kind of industrial frequency withstand voltage experimental rig for three-phase combined type type high pressure GIS
WO2019161519A1 (en) * 2018-02-20 2019-08-29 Industrial Connections & Solutions LLC Switch device for electrical power distribution systems

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DE2037234A1 (en) * 1970-07-01 1972-02-03 Inst Prueffled Fuer Elektrisch Switching device for high voltages
DE2742775A1 (en) * 1977-09-20 1979-03-29 Siemens Ag Earthing switches in series with underground cables - operate with remote control of switches and associated vacuum interrupters incorporated in run of cable
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FR2805406B1 (en) * 2000-02-23 2002-08-23 Alstom THREE-POSITION ELECTRIC SWITCH WITH AN AXIALLY MOBILE SWITCHING ELEMENT
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DE102004006045A1 (en) * 2004-01-30 2005-08-25 Siemens Ag Compressed gas-insulated breaker module and feed-through arrangement

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EP1845540A3 (en) 2008-05-14
DE102006017131A1 (en) 2007-10-18
CN101055813B (en) 2012-02-01
CN101055813A (en) 2007-10-17

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