EP2766914B1 - Switching device - Google Patents

Switching device Download PDF

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Publication number
EP2766914B1
EP2766914B1 EP12799517.3A EP12799517A EP2766914B1 EP 2766914 B1 EP2766914 B1 EP 2766914B1 EP 12799517 A EP12799517 A EP 12799517A EP 2766914 B1 EP2766914 B1 EP 2766914B1
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EP
European Patent Office
Prior art keywords
contact
contact system
extinguishing
switch
vacuum interrupter
Prior art date
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Active
Application number
EP12799517.3A
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German (de)
French (fr)
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EP2766914A1 (en
Inventor
Stefan Wolf
Rene Zlydnik
Stefan Hohmann
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Siemens AG
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Siemens AG
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Publication of EP2766914A1 publication Critical patent/EP2766914A1/en
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Publication of EP2766914B1 publication Critical patent/EP2766914B1/en
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    • 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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/122—Load break switches both breaker and sectionaliser being enclosed, e.g. in SF6-filled container
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • H01H33/127—Load break switches comprising a separate circuit breaker movable with a sectionalising contact arm and operated by such movement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/006—Containing a capacitive switch or usable as such

Definitions

  • the invention relates to a three-position circuit breaker for medium voltage switchgear with a quenching contact system for extinguishing an arc at a switch-off of the switching device and a main contact system connected in series to the quenching system for forming a dielectric separation gap in an open state of the main contact system and extinguished arc, and a grounding contact system.
  • FIG DE-U-202010009448 An example of a three-position circuit breaker is shown in FIG DE-U-202010009448 disclosed.
  • Object of the present invention is to provide a switching device of the type mentioned, which has a compact design. This is achieved in a three-position circuit breaker of the type mentioned above in that the main contact system a first fixed contact and a second fixed contact, which are diametrically opposed, and a Having by means of a centrally disposed between the first and second fixed contact rotary support rotatable moving contact with it integrated extinguishing contact system.
  • the three-position circuit breaker according to the invention is in other words in the form of a three-position load disconnect rotary switch with diametrically opposed first and second fixed contact and a rotatable by means of a centrally disposed between the first and second fixed contact drive shaft moving contact, which for selectively forming a conductive connection between the first and the second fixed contact or for interrupting the connection between the first and the second fixed contact, and has by the integrated in the rotatable moving contact extinguishing contact system of a compact construction, because the extinguishing contact system is part of the moving contact of the main contact system, so that the space requirement is significantly reduced compared to separate, spatially sequentially arranged components.
  • Such trained load-disconnect rotary switch can be arranged in a filled with an insulating gas, such as N2 or the like, container of a medium-voltage switchgear.
  • the extinguishing contact system is formed by a vacuum interrupter, wherein a moving contact terminal bolt of the vacuum interrupter has a guide element, by means of a curved path of the switching device, a drive movement for opening or closing the extinguishing contact system can be introduced.
  • the guide element arranged in the moving contact connecting bolt of the vacuum interrupter in cooperation with the curved path of the switching device, which may be provided, for example, on a pole housing of one pole of the switching device, initiates a drive movement as a forced movement into the moving contact connecting bolt in a simple manner in that when executing a rotary movement of the moving contact of the main contact system, the extinguishing contact system in the form of the vacuum interrupter in a simple manner by embodiment the curved path can be made according to the requirements of the switching device for opening or closing the extinguishing contact system.
  • the curved path for initiating the drive movement in the moving contact connection pin for closing the extinguishing contact system during the rotational movement of a switching of the switching device is designed such that a Einschaltlichtbogen is ignitable only in the main contact system.
  • the ground contact system is formed by a ground contact, a ground counter contact, which are diametrically opposed, and the rotatable moving contact.
  • FIG. 1 shows a Dreiwolfslasttrenn-rotary switch 1 with a first fixed contact 2, for example, provided for connection to a busbar connection of a switchgear not shown figuratively and the first fixed contact 2 diametrically opposite second fixed contact 3, which is provided, for example, for connection to an outgoing terminal of the switchgear.
  • a rotatable moving contact 4 is coupled by means of a centrally disposed between the first fixed contact 2 and the second fixed contact 3 rotary support 5 with a drive shaft not shown figuratively for initiating a rotational movement in the rotary support 5 and execution of a rotary movement of the rotary Beweg Membershipes 4 and provided for selectively forming a conductive connection between the first fixed contact 2 and the second fixed contact 3, as in the FIG.
  • the moving contact terminal pin 9 of the vacuum interrupter 7 is mechanically coupled to a switching bridge 10 which is provided for actuating the BewegCount connecting pin 9 of the vacuum interrupter 7 and for initiating a drive movement in the moving contact terminal pin 9 for opening or closing the extinguishing contact system of the vacuum interrupter 7
  • the switching bridge 10 has for this purpose a guide element 11 in the form of, for example, a roller or a projection, which guide element 11 engages in a cam track 12 of a pole housing 13, so that upon initiation of a rotational movement in the rotatable moving contact 4 via the guide member 11, a forced movement into the moving contact
  • a guide sleeve 14 is provided for the axial guidance of the moving contact connecting bolt 9 and for receiving radial loads of the vacuum interrupter 7.
  • FIG. 1 is the switching device 1 of FIG. 1 shown in a closed position, in which the rotatable moving contact 4 is in a closed position in contact with the first fixed contact 2 and the second fixed contact 3 in a 0 ° position and the extinguishing contact system of the vacuum interrupter 7 with the LöschbewegCount 17 and the erase contact 18 itself also in its closed position.
  • a control unit not shown, a rotational movement in the drive shaft and the coupled to the drive shaft rotary support 5 is introduced, so that the rotatable moving contact 4 in the open position after a rotation of about 45 ° counterclockwise as in FIG.
  • FIG. 3 shows the switching device 1 in a grounding position, wherein after with reference to the FIG. 2 60 ° to the rotation of the rotary support 5, the guide element 11 of the switching bridge 10 in the curved path 12 of the pole housing 13 is caused to another forced movement and the moving contact terminal pin 9 of the extinguishing contact system the vacuum interrupter 7 for closing the extinguishing contact system from ErschbewegCount 17 and erase contact 18 causes.
  • the moving contact 4 passes on the one hand in conductive connection with a ground contact counter 19, which in turn is electrically connected to the second fixed contact 3, and on the other hand in conductive connection with the ground contact 6, so that when the extinguishing contact system of the vacuum interrupter 7 in the FIG. 3 shown grounding position is achieved with a ground of connected to the second fixed contact components of the switchgear.
  • FIG. 4 shows a three-pole version of a load-disconnect rotary switch 1 with three individual poles according to the in the FIGS. 1 to 3 described three-position circuit breaker 1, which are coupled to each other via coupling elements 20, so that via the coupling elements 20 and the connection of the respective outer sides of the rotary support 5 on coupling sides 21 to a drive shaft not shown figuratively, a synchronous switching operation for all three phases is executable.
  • the grounding contacts 6 of the three phases are connected via a connecting element 22 to each other and to ground potential.
  • a switching device 1 has been described in which the vacuum interrupter 7 is designed as a non-switch-on vacuum interrupter, ie the vacuum interrupter 7 is already closed during a switch-on of the switching device 1, before a Einschaltlichtbogen ignited on the main contact system becomes.
  • a vacuum interrupter which does not turn on and thus can not be switched to a load current or a short circuit, is particularly inexpensive and therefore advantageous.
  • the switching device 1 is preferably provided for arrangement in a filled with an insulating gas, such as N2, gas space of a medium voltage switchgear.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Description

Die Erfindung betrifft einen Dreistellungslasttrennschalter für Mittelspannungsschaltanlagen mit einem Löschkontaktsystem zum Löschen eines Lichtbogens bei einem Ausschaltvorgang des Schaltgerätes und einem zu dem Löschkontaktsystem in Reihe geschalteten Hauptkontaktsystem zum Ausbilden einer dielektrischen Trennstrecke in einem geöffneten Zustand des Hauptkontaktsystems und gelöschtem Lichtbogen, und einem Erdungskontaktsystem.The invention relates to a three-position circuit breaker for medium voltage switchgear with a quenching contact system for extinguishing an arc at a switch-off of the switching device and a main contact system connected in series to the quenching system for forming a dielectric separation gap in an open state of the main contact system and extinguished arc, and a grounding contact system.

Ein Beispiel von einem Dreistellungslasttrennschalter ist in der DE-U-202010009448 offenbart.An example of a three-position circuit breaker is shown in FIG DE-U-202010009448 disclosed.

Bei einem aus dem landläufigen Stand der Technik bekannten Dreistellungslasttrennschalter ist ein Löschkontaktsystem zum Löschen eines Lichtbogens in Form einer Vakuumschaltröhre für einen Lasttrennschalter vorgesehen, welchem Löschkontaktsystem in Reihe geschaltet ein Hauptkontaktsystem zum Ausbilden einer dielektrischen Trennstrecke in einem geöffneten Zustand des Hauptkontaktsystems bei gelöschtem Lichtbogen in Form eines schwenkbaren Kontaktes eines Trennschalters, welcher in einem mit einem Isolationsgas gefüllten Behälter angeordnet ist, vorgesehen, wobei mittels einer mit dem schwenkbaren Kontakt des Trennschalters gekoppelten Kurvenscheibe eine Antriebsbewegung in einen Bewegkontakt der Vakuumschaltröhre des Löschkontaktsystems einleitbar ist, so dass bei einem Ausschaltvorgang des Schaltgerätes über die Kurvenscheibe das Löschkontaktsystem geöffnet und ein Lichtbogen gelöscht wird, bevor das Hauptkontaktsystem in seinen geöffneten Zustand unter Ausbildung einer dielektrischen Trennstrecke überführt wird.
Aufgabe der vorliegenden Erfindung ist es, ein Schaltgerät der eingangs genannten Art auszubilden, welches über einen kompakten Aufbau verfügt.
Erfindungsgemäß gelöst wird dies bei einem Dreistellungslasttrennschalter der eingangs genannten Art dadurch, dass das Hauptkontaktsystem einen ersten Festkontakt und einen zweiten Festkontakt, welche sich diametral gegenüberstehen, sowie einen mittels eines mittig zwischen dem ersten und dem zweiten Festkontakt angeordneten Drehstützers drehbaren Bewegkontakt mit darin integriertem Löschkontaktsystem aufweist.In a known from the prior art three-position circuit breaker extinguishing contact system for extinguishing an arc in the form of a vacuum interrupter is provided for a load disconnector, which extinguishing contact system connected in series a main contact system for forming a dielectric separation gap in an open state of the main contact system with extinguished arc in the form of a pivotable contact of a circuit breaker, which is arranged in a container filled with an insulating gas, provided, wherein by means of a coupled to the pivotal contact of the circuit breaker a drive movement in a moving contact of the vacuum interrupter of the extinguishing contact system can be introduced, so that at a switch-off of the switching device on the Cam the extinguishing contact system is opened and an arc is extinguished before the main contact system enters its open state under training he dielectric transfer line is transferred.
Object of the present invention is to provide a switching device of the type mentioned, which has a compact design.
This is achieved in a three-position circuit breaker of the type mentioned above in that the main contact system a first fixed contact and a second fixed contact, which are diametrically opposed, and a Having by means of a centrally disposed between the first and second fixed contact rotary support rotatable moving contact with it integrated extinguishing contact system.

Der erfindungsgemäße Dreistellungslasttrennschalter ist mit anderen Worten in Form eines Dreistellungslasttrenn-Drehschalters ausgebildet mit sich diametral gegenüber stehendem ersten und zweiten Festkontakt und einem mittels einer mittig zwischen dem ersten und dem zweiten Festkontakt angeordneten Antriebswelle drehbaren Bewegkontakt, welcher zur wahlweisen Ausbildung einer leitenden Verbindung zwischen dem ersten und dem zweiten Festkontakt bzw. zum Unterbrechen der Verbindung zwischen dem ersten und dem zweiten Festkontakt vorgesehen ist, und weist durch das in dem drehbaren Bewegkontakt integrierte Löschkontaktsystem einen kompakten Aufbau auf, weil das Löschkontaktsystem Teil des Bewegkontaktes des Hauptkontaktsystems ist, so dass auch der Raumbedarf im Vergleich zu separaten, räumlich nacheinander angeordneten Komponenten deutlich reduziert ist. Ein derart ausgebildeter Lasttrenn-Drehschalter kann in einem mit einem Isolationsgas, beispielsweise N2 oder ähnlichem, gefüllten Behälter einer Mittelspannungsschaltanlage angeordnet sein.The three-position circuit breaker according to the invention is in other words in the form of a three-position load disconnect rotary switch with diametrically opposed first and second fixed contact and a rotatable by means of a centrally disposed between the first and second fixed contact drive shaft moving contact, which for selectively forming a conductive connection between the first and the second fixed contact or for interrupting the connection between the first and the second fixed contact, and has by the integrated in the rotatable moving contact extinguishing contact system of a compact construction, because the extinguishing contact system is part of the moving contact of the main contact system, so that the space requirement is significantly reduced compared to separate, spatially sequentially arranged components. Such trained load-disconnect rotary switch can be arranged in a filled with an insulating gas, such as N2 or the like, container of a medium-voltage switchgear.

In einer vorteilhaften Ausgestaltung der Erfindung ist das Löschkontaktsystem durch eine Vakuumschaltröhre gebildet, wobei ein Bewegkontakt-Anschlussbolzen der Vakuumschaltröhre ein Führungselement aufweist, durch welches mittels einer Kurvenbahn des Schaltgerätes eine Antriebsbewegung zum Öffnen bzw. Schließen des Löschkontaktsystems einleitbar ist. Mit anderen Worten wird durch das am Bewegkontakt-Anschlussbolzen der Vakuumschaltröhre angeordnete Führungselement im Zusammenwirken mit der Kurvenbahn des Schaltgerätes, welche beispielsweise an einem Polgehäuse eines Pols des Schaltgerätes vorgesehen sein kann, in einfacher Weise eine Antriebsbewegung als Zwangsbewegung in den Bewegkontakt-Anschlussbolzen eingeleitet, so dass bei Ausführen einer Drehbewegung des Bewegkontaktes des Hauptkontaktsystems das Löschkontaktsystem in Form der Vakuumschaltröhre in einfacher Weise durch Ausgestaltung der Kurvenbahn entsprechend den Anforderungen an das Schaltgerät zum Öffnen bzw. Schließen des Löschkontaktsystems veranlasst werden kann.In an advantageous embodiment of the invention, the extinguishing contact system is formed by a vacuum interrupter, wherein a moving contact terminal bolt of the vacuum interrupter has a guide element, by means of a curved path of the switching device, a drive movement for opening or closing the extinguishing contact system can be introduced. In other words, the guide element arranged in the moving contact connecting bolt of the vacuum interrupter, in cooperation with the curved path of the switching device, which may be provided, for example, on a pole housing of one pole of the switching device, initiates a drive movement as a forced movement into the moving contact connecting bolt in a simple manner in that when executing a rotary movement of the moving contact of the main contact system, the extinguishing contact system in the form of the vacuum interrupter in a simple manner by embodiment the curved path can be made according to the requirements of the switching device for opening or closing the extinguishing contact system.

In einer vorteilhaften Ausgestaltung der Erfindung ist die Kurvenbahn zur Einleitung der Antriebsbewegung in den Bewegkontakt-Anschlussbolzen zum Schließen des Löschkontaktsystems während der Drehbewegung eines Einschaltvorganges des Schaltgerätes derart ausgebildet, dass ein Einschaltlichtbogen nur im Hauptkontaktsystem zündbar ist. Bei einer derartigen Ausgestaltung von Trennkontakt und Kurvenbahn zur Einleitung der Antriebsbewegung in den Bewegkontaktanschlussbolzen des Löschkontaktsystems kann in vorteilhafter Weise eine nichteinschaltfeste Vakuumschaltröhre im Schaltgerät eingesetzt werden, weil bei derartiger Ausbildung die Vakuumschaltröhre durch Einleiten der Zwangsbewegung über die Kurvenbahn geschlossen ist, bevor der Bewegkontakt des Hauptkontaktsystems die nötige Distanz zum Ausbilden einer dielektrischen Trennstrecke zum ersten und zum zweiten Festkontakt unterschreitet, so dass erst bei geschlossener Vakuumschaltröhre bzw. geschlossenem Löschkontaktsystem ein Lichtbogen im Hauptkontaktsystem gezündet werden kann, von dem die Vakuumschaltröhre aber mit ihrem geschlossenen Kontaktsystem nicht betroffen ist, wodurch diese kostengünstig nicht einschaltfest ausführbar ist.In an advantageous embodiment of the invention, the curved path for initiating the drive movement in the moving contact connection pin for closing the extinguishing contact system during the rotational movement of a switching of the switching device is designed such that a Einschaltlichtbogen is ignitable only in the main contact system. In such an embodiment of isolating contact and cam track for initiating the drive movement in the Bewegkontaktanschlussbolzen the extinguishing contact system can be used in the switching device advantageously nichteinschaltfeste vacuum interrupter, because in such a design, the vacuum interrupter is closed by initiating the forced movement on the curved path before the moving contact of the main contact system the distance required to form a dielectric separation distance to the first and second fixed contact falls below, so that only when the vacuum interrupter or closed extinguishing contact system an arc in the main contact system can be ignited, of which the vacuum interrupter but is not affected by their closed contact system, making this cost not switchable executable.

In einer besonders vorteilhaften Ausgestaltung der Erfindung ist das Erdungskontaktsystem durch einen Erdungskontakt, einen Erdungsgegenkontakt, welche sich diametral gegenüberstehen, sowie den drehbaren Bewegkontakt gebildet. Durch ein derartiges Erdungskontaktsystem ist in einfacher Weise ein Dreistellungslasttrennschalter ausgebildet, welcher mit dem drehbaren Bewegkontakt die Schaltstellungen EIN, AUS und ERDE realisieren kann.In a particularly advantageous embodiment of the invention, the ground contact system is formed by a ground contact, a ground counter contact, which are diametrically opposed, and the rotatable moving contact. By such a grounding contact system, a three-position circuit breaker is formed in a simple manner, which can realize the switching positions ON, OFF and EARTH with the rotatable moving contact.

Die Erfindung wird im Folgenden anhand der Zeichnungen und eines Ausführungsbeispiels mit Bezug auf die beiliegenden Figuren näher erläutert. Es zeigen:

Figur 1:
eine Schnittansicht durch den erfindungsgemäßen Dreistellungslasttrennschalter in einer ersten Schaltstellung;
Figur 2:
eine Schnittansicht durch den erfindungsgemäßen Dreistellungslasttrennschalter in einer zweiten Schaltstellung;
Figur 3:
eine Schnittansicht durch den erfindungsgemäßen Dreistellungslasttrennschalter in einer dritten Schaltstellung; und
Figur 4:
eine Ansicht eines dreiphasigen Dreistellungslasttrennschalters.
The invention is explained in more detail below with reference to the drawings and an embodiment with reference to the accompanying figures. Show it:
FIG. 1:
a sectional view through the three-position circuit breaker according to the invention in a first switching position;
FIG. 2:
a sectional view through the three-position circuit breaker according to the invention in a second switching position;
FIG. 3:
a sectional view through the three-position switch-disconnector according to the invention in a third switching position; and
FIG. 4:
a view of a three-phase three-position circuit breaker.

Figur 1 zeigt einen Dreistellungslasttrenn-Drehschalter 1 mit einem ersten Festkontakt 2, beispielsweise vorgesehen zum Verbinden mit einem Sammelschienenanschluss einer figürlich nicht dargestellten Schaltanlage und einem dem ersten Festkontakt 2 diametral gegenüberliegenden zweiten Festkontakt 3, welcher beispielsweise zum Verbinden mit einem Abgangsanschluss der Schaltanlage vorgesehen ist. Ein drehbarer Bewegkontakt 4 ist mittels eines mittig zwischen dem ersten Festkontakt 2 und dem zweiten Festkontakt 3 angeordneten Drehstützers 5 mit einer figürlich nicht dargestellten Antriebswelle zum Einleiten einer Drehbewegung in den Drehstützer 5 und Ausführung einer Drehbewegung des drehbaren Bewegkontaktes 4 gekoppelt und vorgesehen zum wahlweisen Ausbilden einer leitenden Verbindung zwischen dem ersten Festkontakt 2 und dem zweiten Festkontakt 3, wie in der Figur 1 dargestellt, bzw. zum Unterbrechen der leitenden Verbindung zwischen dem ersten Festkontakt 2 und dem zweiten Festkontakt 3, wie mit Bezug auf die Figur 2 näher erläutere, oder zum Ausbilden einer Erdungsstellung über einen Erdungskontakt 6 zur Erdung von mit dem zweiten Festkontakt 3 elektrisch leitend verbundenen Schaltanlagenteilen, wie mit Bezug auf Figur 3 weiter unten näher erläutert. Im Drehstützer 5 angeordnet und in den Bewegkontakt 4 integriert ist ein Löschkontaktsystem in Form einer Vakuumschaltröhre 7, deren Festkontakt-Anschlussbolzen 8 mit dem Bewegkontakt 4 direkt leitend verbunden ist, deren Bewegkontakt-Anschlussbolzen 9 ebenfalls mit dem drehbaren Bewegkontakt 4 direkt leitend verbunden ist. Der Bewegkontakt-Anschlussbolzen 9 der Vakuumschaltröhre 7 ist mit einer Schaltbrücke 10 mechanisch gekoppelt, welche zur Betätigung des Bewegkontakt-Anschlussbolzens 9 der Vakuumschaltröhre 7 und zum Einleiten einer Antriebsbewegung in den Bewegkontakt-Anschlussbolzen 9 zum Öffnen bzw. Schließen des Löschkontaktsystems der Vakuumschaltröhre 7 vorgesehen ist. Die Schaltbrücke 10 weist dazu ein Führungselement 11 in Form beispielsweise einer Rolle oder eines Vorsprungs auf, welches Führungselement 11 in eine Kurvenbahn 12 eines Polgehäuses 13 eingreift, so dass bei Einleiten einer Drehbewegung in den drehbaren Bewegkontakt 4 über das Führungselement 11 eine Zwangsbewegung in den Bewegkontakt-Anschlussbolzen 9 der Vakuumschaltröhre 7 einleitbar ist zum Öffnen bzw. Schließen des Löschkontaktsystems der Vakuumschaltröhre 7. Eine Führungshülse 14 ist zur axialen Führung des Bewegkontakt-Anschlussbolzens 9 und zur Aufnahme radialer Belastungen der Vakuumschaltröhre 7 vorgesehen. Zwischen der Schaltbrücke 10 und dem Bewegkontakt-Anschlussbolzen 9 ist weiterhin eine Kontaktdruckfeder 15 angeordnet, welche im geschlossenen Zustand zur Aufwendung der nötigen Kontaktandruckkraft auf das Löschkontaktsystem vorgesehen ist. FIG. 1 shows a Dreistellungslasttrenn-rotary switch 1 with a first fixed contact 2, for example, provided for connection to a busbar connection of a switchgear not shown figuratively and the first fixed contact 2 diametrically opposite second fixed contact 3, which is provided, for example, for connection to an outgoing terminal of the switchgear. A rotatable moving contact 4 is coupled by means of a centrally disposed between the first fixed contact 2 and the second fixed contact 3 rotary support 5 with a drive shaft not shown figuratively for initiating a rotational movement in the rotary support 5 and execution of a rotary movement of the rotary Bewegkontaktes 4 and provided for selectively forming a conductive connection between the first fixed contact 2 and the second fixed contact 3, as in the FIG. 1 illustrated, or for interrupting the conductive connection between the first fixed contact 2 and the second fixed contact 3, as with reference to the FIG. 2 to explain more detail, or to form a grounding position via a grounding contact 6 for grounding of the second fixed contact 3 electrically connected switchgear parts, as with reference to FIG. 3 explained in more detail below. Arranged in the rotary support 5 and in the Moving contact 4 is integrated an extinguishing contact system in the form of a vacuum interrupter 7, the fixed contact terminal pin 8 is connected to the moving contact 4 directly conductive, the moving contact terminal pin 9 is also connected to the rotary movable contact 4 directly conductive. The moving contact terminal pin 9 of the vacuum interrupter 7 is mechanically coupled to a switching bridge 10 which is provided for actuating the Bewegkontakt connecting pin 9 of the vacuum interrupter 7 and for initiating a drive movement in the moving contact terminal pin 9 for opening or closing the extinguishing contact system of the vacuum interrupter 7 , The switching bridge 10 has for this purpose a guide element 11 in the form of, for example, a roller or a projection, which guide element 11 engages in a cam track 12 of a pole housing 13, so that upon initiation of a rotational movement in the rotatable moving contact 4 via the guide member 11, a forced movement into the moving contact A guide sleeve 14 is provided for the axial guidance of the moving contact connecting bolt 9 and for receiving radial loads of the vacuum interrupter 7. Between the switching bridge 10 and the moving contact connecting pin 9, a contact pressure spring 15 is further arranged, which is provided in the closed state for applying the necessary Kontaktandruckkraft on the extinguishing contact system.

Die Funktion des Schaltgerätes 1 der Figur 1 wird mit Bezug auf die Figuren 1 bis 3 näher erläutert. In Figur 1 ist das Schaltgerät 1 der Figur 1 in einer geschlossenen Stellung dargestellt, bei der sich der drehbare Bewegkontakt 4 in einer 0°-Position in einer Einschaltstellung in Kontakt mit dem ersten Festkontakt 2 und dem zweiten Festkontakt 3 befindet und das Löschkontaktsystem der Vakuumschaltröhre 7 mit dem Löschbewegkontakt 17 und dem Löschfestkontakt 18 sich ebenfalls in seiner geschlossenen Stellung befindet. Beim Auslösen eines Schaltvorganges durch eine figürlich nicht dargestellte Steuerungseinheit wird eine Drehbewegung in die Antriebswelle und den mit der Antriebswelle gekoppelten Drehstützer 5 eingeleitet, so dass sich der drehbare Bewegkontakt 4 in die Ausschaltstellung nach einer Drehung um ca. 45° gegen den Uhrzeigersinn wie in Figur 2 dargestellt bewegt, wobei während der Drehbewegung und nach Trennung des Bewegkontaktes 4 von den Festkontakten 2 und 3 das Führungselement 11 der Schaltbrücke 10 in der Kurvenbahn 12 des Polgehäuses 13 zu einer Zwangsbewegung veranlasst ist und den Bewegkontakt-Anschlussbolzen 9 des Löschkontaktsystems der Vakuumschaltröhre 7 zum Öffnen des Löschkontaktsystems und zur Trennung von Löschbewegkontakt 17 und Löschfestkontakt 18 veranlasst. Dabei wird sowohl ein Ausschaltlichtbogen zwischen Bewegkontakt 4 und den Festkontakten 2 und 3 gezündet sowie ein Lichtbogen in der Vakuumschaltröhre 7, welcher in einem Stromnulldurchgang gelöscht wird. Durch die weitere Drehbewegung bei gelöschtem Lichtbogen und geöffnetem Löschkontaktsystem der Vakuumschaltröhre 7 wird schließlich die in der Figur 2 dargestellte Ausschaltstellung erreicht, welche die Anforderungen an eine dielektrische Trennstrecke an den Lasttrennschalter erfüllt.The function of the switching device 1 of FIG. 1 will be related to the FIGS. 1 to 3 explained in more detail. In FIG. 1 is the switching device 1 of FIG. 1 shown in a closed position, in which the rotatable moving contact 4 is in a closed position in contact with the first fixed contact 2 and the second fixed contact 3 in a 0 ° position and the extinguishing contact system of the vacuum interrupter 7 with the Löschbewegkontakt 17 and the erase contact 18 itself also in its closed position. When triggering a switching operation by a control unit, not shown, a rotational movement in the drive shaft and the coupled to the drive shaft rotary support 5 is introduced, so that the rotatable moving contact 4 in the open position after a rotation of about 45 ° counterclockwise as in FIG. 2 shown, wherein during the rotational movement and after separation of the moving contact 4 of the fixed contacts 2 and 3, the guide element 11 of the switching bridge 10 in the curved path 12 of the pole housing 13 causes forced movement and the moving contact terminal pin 9 of the extinguishing contact system of the vacuum interrupter 7 to open the extinguishing contact system and the separation of Erschbewegkontakt 17 and erase contact 18 causes. In this case, both a Ausschaltlichtbogen between moving contact 4 and the fixed contacts 2 and 3 is ignited and an arc in the vacuum interrupter 7, which is extinguished in a current zero crossing. Due to the further rotational movement with the arc extinguished and the extinguishing contact system of the vacuum interrupter 7 is finally in the FIG. 2 achieved switch-off position, which meets the requirements of a dielectric separation path to the load-break switch.

Aus der Ausschaltstellung der Figur 2 ist ein Einschaltvorgang mittels einer umgekehrten Drehbewegung der Antriebswelle und des Drehstützers 5 derart ausführbar, dass über die Gestaltung der Kurvenbahn 12 beim Drehen des drehbaren Bewegkontaktes 4 zunächst über die in das Führungselement 11 der Schaltbrücke 10 eingeleitete Zwangsbewegung in den Bewegkontakt-Anschlussbolzen 9 das Löschkontaktsystem der Vakuumschaltröhre 7 über die Kontaktandruckfeder 15 geschlossen wird, bevor der drehbare Bewegkontakt 4 wieder eine leitende Verbindung mit dem ersten Festkontakt 2 und dem zweiten Festkontakt 3 des Hauptkontaktsystems eingeht, so dass ein Einschaltlichtbogen zwischen dem drehbaren Bewegkontakt 4 und dem ersten Festkontakt 2 und dem zweiten Festkontakt 3 bei bereits geschlossenem Löschkontaktsystem der Vakuumschaltröhre 7 gezündet wird, und schließlich bei weiterer Drehbewegung die Einschaltstellung des Dreisstellungslasttrennschalters 1 der Figur 1 wieder erreicht ist.From the off position of the FIG. 2 is a switch-on by means of a reverse rotational movement of the drive shaft and the rotary support 5 executable such that on the design of the cam track 12 when rotating the rotary Bewegkontaktes 4 initially introduced into the guide element 11 of the switching bridge 10 forced movement in the moving contact terminal pin 9, the extinguishing contact system Vacuum stop tube 7 is closed via the Kontaktandruckfeder 15 before the rotatable moving contact 4 again receives a conductive connection with the first fixed contact 2 and the second fixed contact 3 of the main contact system, so that a Einschaltlichtbogen between the rotary movable contact 4 and the first fixed contact 2 and the second fixed contact 3 is ignited at already closed extinguishing contact system of the vacuum interrupter 7, and finally upon further rotational movement, the closed position of the Dreisstellungslastentrennschalters 1 of FIG. 1 is reached again.

Figur 3 zeigt das Schaltgerät 1 in einer Erdungsstellung, wobei nach dem mit Bezug auf die Figur 2 bereits beschriebenen Ausschaltvorgang eine weitere Drehung der Antriebswelle entgegen dem Uhrzeigersinn um im Ausführungsbeispiel ca. 60° zur Drehung des Drehstützers 5 das Führungselement 11 der Schaltbrücke 10 in der Kurvenbahn 12 des Polgehäuses 13 zu einer weiteren Zwangsbewegung veranlasst ist und den Bewegkontakt-Anschlussbolzen 9 des Löschkontaktsystems der Vakuumschaltröhre 7 zum Schließen des Löschkontaktsystems aus Löschbewegkontakt 17 und Löschfestkontakt 18 veranlasst. Bei dieser Drehbewegung gelangt der Bewegkontakt 4 einerseits in leitende Verbindung mit einem Erdungsgegenkontakt 19, welcher wiederum mit dem zweiten Festkontakt 3 elektrisch leitend verbunden ist, sowie andererseits in leitende Verbindung mit dem Erdungskontakt 6, so dass bei geschlossenem Löschkontaktsystem der Vakuumschaltröhre 7 die in der Figur 3 dargestellte Erdungsstellung erreicht ist mit einer Erdung von mit dem zweiten Festkontakt verbundenen Bauteilen der Schaltanlage. FIG. 3 shows the switching device 1 in a grounding position, wherein after with reference to the FIG. 2 60 ° to the rotation of the rotary support 5, the guide element 11 of the switching bridge 10 in the curved path 12 of the pole housing 13 is caused to another forced movement and the moving contact terminal pin 9 of the extinguishing contact system the vacuum interrupter 7 for closing the extinguishing contact system from Erschbewegkontakt 17 and erase contact 18 causes. During this rotational movement of the moving contact 4 passes on the one hand in conductive connection with a ground contact counter 19, which in turn is electrically connected to the second fixed contact 3, and on the other hand in conductive connection with the ground contact 6, so that when the extinguishing contact system of the vacuum interrupter 7 in the FIG. 3 shown grounding position is achieved with a ground of connected to the second fixed contact components of the switchgear.

Figur 4 zeigt eine dreipolige Ausführung eines Lasttrenn-Drehschalters 1 mit drei Einzelpolen gemäß dem in den Figuren 1 bis 3 beschriebenen Dreistellungslasttrennschalters 1, welche über Kopplungselemente 20 miteinander gekoppelt sind, so dass über die Kopplungselemente 20 und die Anbindung der jeweils äußeren Seiten der Drehstützer 5 an Kopplungsseiten 21 an eine figürlich nicht dargestellte Antriebswelle ein synchroner Schaltvorgang für alle drei Phasen ausführbar ist. Die Erdungskontakte 6 der drei Phasen sind dabei über ein Verbindungselement 22 miteinander und mit Erdpotential verbunden. FIG. 4 shows a three-pole version of a load-disconnect rotary switch 1 with three individual poles according to the in the FIGS. 1 to 3 described three-position circuit breaker 1, which are coupled to each other via coupling elements 20, so that via the coupling elements 20 and the connection of the respective outer sides of the rotary support 5 on coupling sides 21 to a drive shaft not shown figuratively, a synchronous switching operation for all three phases is executable. The grounding contacts 6 of the three phases are connected via a connecting element 22 to each other and to ground potential.

Mit Bezug auf die Figuren 1 bis 4 wurde im Ausführungsbeispiel ein Schaltgerät 1 beschrieben, bei dem die Vakuumschaltröhre 7 als nicht einschaltfeste Vakuumschaltröhre ausgeführt ist, d. h. die Vakuumschaltröhre 7 ist während eines Einschaltvorganges des Schaltgerätes 1 bereits geschlossen, bevor ein Einschaltlichtbogen am Hauptkontaktsystem gezündet wird. Eine derartige Vakuumschaltröhre, die nicht einschaltfest und damit nicht auf einen Laststrom oder einen Kurzschluss geschaltet werden kann, ist besonders kostengünstig und damit vorteilhaft. Das Schaltgerät 1 ist dabei vorzugsweise zur Anordnung in einem mit einem Isolationsgas, wie beispielsweise N2, gefüllten Gasraum einer Mittelspannungsschaltanlage vorgesehen.With reference to the FIGS. 1 to 4 In the exemplary embodiment, a switching device 1 has been described in which the vacuum interrupter 7 is designed as a non-switch-on vacuum interrupter, ie the vacuum interrupter 7 is already closed during a switch-on of the switching device 1, before a Einschaltlichtbogen ignited on the main contact system becomes. Such a vacuum interrupter, which does not turn on and thus can not be switched to a load current or a short circuit, is particularly inexpensive and therefore advantageous. The switching device 1 is preferably provided for arrangement in a filled with an insulating gas, such as N2, gas space of a medium voltage switchgear.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
DreistellungslasttrennschalterThree-position switch disconnectors
22
erster Festkontaktfirst fixed contact
33
zweiter Festkontaktsecond fixed contact
44
drehbarer Bewegkontaktrotatable moving contact
55
Drehstützerrotary supporters
66
Erdungskontaktground contact
77
VakuumschaltröhreVacuum interrupter
88th
Festkontakt-Anschlussbolzen VakuumschaltröhreFixed contact connection bolt Vacuum interrupter
99
Bewegkontakt-Anschlussbolzen VakuumschaltröhreMoving contact connection bolt Vacuum interrupter
1010
Schaltbrückejumper
1111
Führungselementguide element
1212
Kurvenbahncam track
1313
Polgehäusepole housing
1414
Führungshülseguide sleeve
1515
KontaktdruckfederContact pressure spring
1717
LöschbewegkontaktLöschbewegkontakt
1818
LöschfestkontaktExtinguishing fixed contact
1919
ErdungsgegenkontaktGrounding counter contact
2020
Kopplungselementecoupling elements
2121
Kopplungsseitencoupling sides
2222
Verbindungselementconnecting element

Claims (4)

  1. Three-position load isolating switch (1) for medium-voltage switchgear assemblies having an extinguishing contact system (7) for extinguishing an arc during a switch-off process of the switching device (1) and having a main contact system, which is connected in series to the extinguishing contact system (7), for forming a dielectric isolating gap in an open state of the main contact system and an extinguished arc, and having a ground contact system,
    characterised in that
    the main contact system has a first fixed contact (2) and a second fixed contact (3), which are situated diametrically opposite one another, and also a moving contact (4) which can be rotated by means of a rotary support (5) which is arranged centrally between the first fixed contact (2) and the second fixed contact (3), and in that the extinguishing contact system (7) is integrated in the rotatable moving contact (4).
  2. Three-position load isolating switch (1) according to claim 1,
    characterised in that
    the extinguishing contact system is formed by a vacuum interrupter (7), wherein a moving contact connecting bolt (9) of the vacuum interrupter (7) has a guide element (11) by means of which a drive movement for opening or closing the extinguishing contact system can be initiated by means of a cam track (12) of the switching device (1).
  3. Three-position load isolating switch (1) according to claim 1 or 2,
    characterised in that
    the cam track (12) for initiating the drive movement into the moving contact connecting bolt (9) in order to close the extinguishing contact system during the rotary movement of a switch-on procedure of the switching device (1) is formed in such a manner that a switch-on arc can be ignited only in the main contact system.
  4. Three-position load isolating switch (1) according to one of the preceding claims,
    characterised in that
    the ground contact system is formed by a ground contact (6), a ground counter-contact (19), which are situated diametrically opposite one another, and also the rotatable moving contact (4).
EP12799517.3A 2011-12-02 2012-11-21 Switching device Active EP2766914B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087630.8A DE102011087630B4 (en) 2011-12-02 2011-12-02 switchgear
PCT/EP2012/073260 WO2013079381A1 (en) 2011-12-02 2012-11-21 Switching device

Publications (2)

Publication Number Publication Date
EP2766914A1 EP2766914A1 (en) 2014-08-20
EP2766914B1 true EP2766914B1 (en) 2017-01-18

Family

ID=47356002

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12799517.3A Active EP2766914B1 (en) 2011-12-02 2012-11-21 Switching device

Country Status (5)

Country Link
EP (1) EP2766914B1 (en)
CN (1) CN103959417B (en)
DE (1) DE102011087630B4 (en)
IN (1) IN2014KN01104A (en)
WO (1) WO2013079381A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104810186B (en) * 2014-11-18 2017-09-29 平高集团有限公司 A kind of moving-contact unit and the three-station using the moving-contact unit
CN110718415B (en) * 2018-07-12 2021-11-16 平高集团有限公司 Vacuum circuit breaker
CN113826181B (en) * 2019-03-29 2024-06-07 西门子股份公司 Optimized three-position switch
CN112185719A (en) * 2019-07-05 2021-01-05 北京京人电器有限公司 Load switch
CN112563065B (en) * 2020-09-24 2021-12-17 河南平高电气股份有限公司 Quiet end subassembly and isolation earthing switch
FR3121267A1 (en) 2021-03-24 2022-09-30 Schneider Electric Industries Sas Switching system of an electrical device
EP4089705A1 (en) * 2021-05-13 2022-11-16 ABB Schweiz AG A medium voltage switching apparatus
EP4089704A1 (en) * 2021-05-13 2022-11-16 ABB Schweiz AG A medium voltage switching apparatus

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Publication number Priority date Publication date Assignee Title
US2469203A (en) * 1945-12-04 1949-05-03 Gen Electric Electric switch
DE2818914A1 (en) * 1978-04-28 1979-10-31 Siemens Ag SWITCH COMBINATION FOR BUSBAR SYSTEMS
DE3528770A1 (en) * 1985-08-10 1987-02-19 Driescher Eltech Werk Medium-voltage switching installation
DE202010009448U1 (en) * 2010-06-23 2010-09-09 Ipt International Power & Technology Gmbh High voltage switching device
CN102157294B (en) * 2011-03-31 2013-09-04 厦门科力特电气有限公司 Three-station isolation ground switch
DE102011017815B3 (en) * 2011-04-29 2012-10-11 Siemens Aktiengesellschaft switchgear

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Also Published As

Publication number Publication date
DE102011087630A1 (en) 2013-06-06
WO2013079381A1 (en) 2013-06-06
EP2766914A1 (en) 2014-08-20
DE102011087630B4 (en) 2016-11-03
IN2014KN01104A (en) 2015-10-09
CN103959417A (en) 2014-07-30
CN103959417B (en) 2017-06-16

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