EP2689446B1 - Switching device - Google Patents

Switching device Download PDF

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Publication number
EP2689446B1
EP2689446B1 EP12716369.9A EP12716369A EP2689446B1 EP 2689446 B1 EP2689446 B1 EP 2689446B1 EP 12716369 A EP12716369 A EP 12716369A EP 2689446 B1 EP2689446 B1 EP 2689446B1
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EP
European Patent Office
Prior art keywords
contact
switching device
contact system
quenching
fixed contact
Prior art date
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Active
Application number
EP12716369.9A
Other languages
German (de)
French (fr)
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EP2689446A1 (en
Inventor
Stefan Wolf
Rene Zlydnik
Marco Adelmann
Kristian Ermeler
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Siemens AG
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Siemens AG
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Publication of EP2689446A1 publication Critical patent/EP2689446A1/en
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Publication of EP2689446B1 publication Critical patent/EP2689446B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—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
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric

Definitions

  • the invention relates to a switching device, in particular a switch disconnector, for medium voltage switchgear with a quenching contact system for extinguishing an arc at a turn-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, the Main contact system having a first fixed contact and a second fixed contact, which are diametrically opposed, as well as a rotatable by means of a centrally disposed between the first and second fixed contact rotary support moving contact with integrated therein extinguishing contact system.
  • an extinguishing contact system for extinguishing an arc is provided in the form of a vacuum interrupter 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, by means of a coupled to the pivotal contact of the circuit breaker cam 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 in its open state to form a dielectric Separating section is transferred.
  • a switching device of the type mentioned is from the US 2 469 203 A known.
  • Object of the present invention is to provide a switching device of the type mentioned, which has a compact design.
  • the switching device is in other words in the form of a load-disconnect rotary switch formed 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.
  • an insulating gas such as N2 or the like, container of a medium-voltage switchgear.
  • the main contact system has two switch positions and two off positions, which are each offset by 90 ° to each other, so that between the various switch positions on different curved paths designs different controls the BewegCount connecting pin of the extinguishing contact system are possible to perform, for example, a switch-on by differently configured curved path differently than a switch-off of the switching device.
  • 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 which a cam movement 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 that when executing a rotary motion of the moving contact of the main contact system, the extinguishing contact system in the form of the vacuum interrupter can be made in a simple manner by designing the curved path according to the requirements of the switching device for opening or closing the extinguishing contact system.
  • the first fixed contact and the second fixed contact on a circumferential extent with respect to a rotational movement of the moving contact of the main contact system such that between the moving contact of the main contact system and the first and second fixed contact of the switching device during a rotary movement of a switch-off a conductive Connection is formed during the initiation of the drive movement by guide member and cam track in the BewegmasanInstitut the vacuum interrupter for opening the extinguishing contact system and extinguishing the arc.
  • Such a circumferential extent of the first and second fixed contact of the switching device allows in other words that when initiating a rotational movement for a switch-off of the switching device initially by means of the guide member and the cam track, a drive movement is introduced into the moving contact terminal pin of the extinguishing contact system in the form of the vacuum interrupter, so that the extinguishing contact system is first opened by means of the forced movement of the moving contact connecting bolt of the vacuum interrupter and an arc is extinguished, before the rotary movement is carried out further the moving contact of the main contact system of the moving contact of the main contact system interrupts the conductive connection with the first fixed contact and the second fixed contact of the switching device and forms a dielectric separation path, which is formed by the distance formed in the open state between the moving contact of the main contact system and the first and second fixed contact and the open contact system of the vacuum interrupter is formed.
  • the circumferential extent of the first and second fixed contact preferably about 0 ° to 30 °, wherein the curved path is provided for initiating the forced movement in the BewegCountan gleichbolzen the extinguishing contact system in the range of this rotation from 0 ° to 30 °, so that first the arc is extinguished in the extinguishing contact system and then the dielectric separation distance is reached upon further rotation.
  • the curved path for initiating the drive movement in the moving contact connecting bolt 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.
  • FIG. 1 shows a switching device 1 in the form of a load-disconnect rotary switch 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, for example, to connect to a outgoing terminal the switchgear is provided.
  • a switching device 1 in the form of a load-disconnect rotary switch 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, for example, to connect to a outgoing terminal the switchgear is provided.
  • 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 on coupling sides 6 for introducing a rotational movement in the rotary support 5 and execution of a rotary movement of the rotary BewegCountes 4 and provided for optionally forming a conductive connection between the first fixed contact 2 and the second fixed contact 3, as in 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 FIGS. 2 to 5 explained in more detail below.
  • 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 directly to the rotating movable contact 4.
  • 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.
  • the first fixed contact 2 and the second fixed contact 3 have a circumferential extent, by which it is ensured that during a rotary movement of the moving contact 4, a conductive connection between the first fixed contact 2 and the second fixed contact 3 is maintained during a switch-off until via the forced movement of the moving contact connecting pin 9, initiated by the cam track 12 and the guide element 11 of the switching bridge 10, the extinguishing contact system opened and an arc in the vacuum interrupter 7 is deleted.
  • FIG. 2 is the switching device 1 of FIG. 1 shown in a closed position in which the rotatable moving contact 4 is in a 0 ° position in a first closed position in contact with the first fixed contact 2 and the second fixed contact 3 and the extinguishing contact system of the vacuum interrupter 7 with the ErschbewegWallet 17 and the erase fixed contact 18th is also in its closed position.
  • the extinguishing contact system of the vacuum interrupter 7 for opening the extinguishing contact system and the separation of extinguishing contact 17 and extinguishing contact 18 causes, whereby an arc in the vacuum interrupter 7 burns and is extinguished in a zero crossing, and then the further rotation with the arc extinguished and the extinguishing contact system of the vacuum interrupter 7 to Separation of the main contact system leads by the rotatable moving contact 4 of the main contact system interrupts the conductive connection with the first fixed contact 2 and the second fixed contact 3 and finally the in the FIG. 3 illustrated first off position occupies, which meets the requirements of a dielectric separation path to the load-break switch. From the first off position of the FIG.
  • the second closed position of the switching device 1 of FIG. 4 is achieved, in which the rotatable moving contact 4 in a rotated position by 180 ° in comparison to the FIG. 2 located.
  • FIG. 5 shows the switching device 1 in a second switch-off position, wherein a switch-off operation corresponding to that with reference to the FIGS. 2 and 3 already described shutdown was performed.
  • the second switch-off position is thus the rotatable moving contact 4 in a 180 ° relative to the FIG. 3 rotated position or in a 270 ° relative to the FIG. 2 rotated position.
  • FIG. 6 shows a three-pole version of a load-disconnect rotary switch with three single poles according to the in FIGS. 1 to 5 described switching device 1, which are coupled to each other via coupling elements 19, so that via the coupling elements 19 and the connection of the respective outer rotary support 5 on coupling sides 6 to a drive shaft not shown figuratively a synchronous switching operation for all three phases is executable.
  • FIG. 7 shows a combination of the switching device 1 with a separate earthing switch 20, which has a pivotal contact 21, with which via a separate earth drive shaft 22 a as in FIG. 8 shown grounding position can be taken.
  • a switching device 1 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 is ignited on the main contact system.
  • 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

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

Description

Die Erfindung betrifft ein Schaltgerät, insbesondere einen Lasttrennschalter, 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, wobei 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.The invention relates to a switching device, in particular a switch disconnector, for medium voltage switchgear with a quenching contact system for extinguishing an arc at a turn-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, the Main contact system having a first fixed contact and a second fixed contact, which are diametrically opposed, as well as a rotatable by means of a centrally disposed between the first and second fixed contact rotary support moving contact with integrated therein extinguishing contact system.

Bei einem aus dem landläufigen Stand der Technik bekannten Schaltgerät 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.In a known from the prior art switching device, an extinguishing contact system for extinguishing an arc is provided in the form of a vacuum interrupter 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, by means of a coupled to the pivotal contact of the circuit breaker cam 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 in its open state to form a dielectric Separating section is transferred.

Ein Schaltgerät der eingangs genannten Art ist aus der US 2 469 203 A bekannt.A switching device of the type mentioned is from the US 2 469 203 A known.

Aufgabe der vorliegenden Erfindung ist es, ein Schaltgerät der eingangs genannten Art auszubilden, welches über einen kompakten Aufbau verfügt.Object of the present invention is to provide a switching device of the type mentioned, which has a compact design.

Erfindungsgemäß gelöst wird dies bei einem Schaltgerät der eingangs genannten Art dadurch, dass der Bewegkontakt des Hauptkontaktsystems um 360° drehbar ausgebildet ist.This is achieved according to the invention in a switching device of the type mentioned above in that the moving contact of the main contact system is designed to be rotatable by 360 °.

Das erfindungsgemäße Schaltgerät ist mit anderen Worten in Form eines Lasttrenn-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. Bei einer derartigen Ausbildung des Bewegkontaktes des Hauptkontaktsystems mit Drehbarkeit um 360° weist das Hauptkontaktsystem zwei Einschaltstellungen sowie zwei Ausschaltstellungen auf, welche jeweils um 90° gegeneinander versetzt sind, so dass zwischen den verschiedenen Schaltstellungen über verschiedene Kurvenbahnen Gestaltungen verschiedene Ansteuerungen des Bewegkontakt-Anschlussbolzens des Löschkontaktsystems ermöglicht sind, um beispielsweise einen Einschaltvorgang durch anders ausgestaltete Kurvenbahn anders auszuführen als einen Ausschaltvorgang des Schaltgerätes.The switching device according to the invention is in other words in the form of a load-disconnect rotary switch formed 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 such a design of the moving contact of the main contact system with 360 ° rotation, the main contact system has two switch positions and two off positions, which are each offset by 90 ° to each other, so that between the various switch positions on different curved paths designs different controls the Bewegkontakt connecting pin of the extinguishing contact system are possible to perform, for example, a switch-on by differently configured curved path differently than a switch-off of the switching device.

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 which a cam movement 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 that when executing a rotary motion of the moving contact of the main contact system, the extinguishing contact system in the form of the vacuum interrupter can be made in a simple manner by designing the curved path according to the requirements of the switching device for opening or closing the extinguishing contact system.

In einer weiteren vorteilhaften Ausgestaltung der Erfindung weisen der erste Festkontakt und der zweite Festkontakt eine umfängliche Ausdehnung bezüglich einer Drehbewegung des Bewegkontaktes des Hauptkontaktsystems derart auf, dass zwischen dem Bewegkontakt des Hauptkontaktsystems und dem ersten und dem zweiten Festkontakt des Schaltgerätes während einer Drehbewegung eines Ausschaltvorganges eine leitende Verbindung während der Einleitung der Antriebsbewegung durch Führungselement und Kurvenbahn in den Bewegkontaktanschluss der Vakuumschaltröhre zum Öffnen des Löschkontaktsystems und Löschen des Lichtbogens ausgebildet ist. Eine derartige umfängliche Ausdehnung von erstem und zweitem Festkontakt des Schaltgerätes ermöglicht es mit anderen Worten, dass beim Einleiten einer Drehbewegung für einen Ausschaltvorgang des Schaltgerätes zunächst mittels des Führungselementes und der Kurvenbahn eine Antriebsbewegung in den Bewegkontakt-Anschlussbolzen des Löschkontaktsystems in Form der Vakuumschaltröhre eingeleitet wird, so dass zunächst über die Zwangsbewegung des Bewegkontakt-Anschlussbolzens der Vakuumschaltröhre das Löschkontaktsystem geöffnet und ein Lichtbogen gelöscht wird, bevor bei weiterer Ausführung der Drehbewegung des Bewegkontaktes des Hauptkontaktsystems der Bewegkontakt des Hauptkontaktsystems die leitende Verbindung mit dem ersten Festkontakt und dem zweiten Festkontakt des Schaltgerätes unterbricht und eine dielektrische Trennstrecke bildet, welche durch den im geöffneten Zustand ausgebildeten Abstand zwischen dem Bewegkontakt des Hauptkontaktsystems und dem ersten und dem zweiten Festkontakt sowie dem geöffneten Kontaktsystem der Vakuumschaltröhre gebildet ist. So kann beispielsweise bei einem erfindungsgemäßen Schaltgerät, welches nach einer 90°-Drehung des drehbaren Bewegkontaktes aus der Einschaltstellung eine Ausschaltstellung mit ausgebildeter dielektrischer Trennstrecke erreicht, die umfängliche Ausdehnung von erstem und zweitem Festkontakt vorzugsweise etwa von 0° bis 30° betragen, wobei die Kurvenbahn zum Einleiten der Zwangsbewegung in den Bewegkontaktanschlussbolzen des Löschkontaktsystems im Bereich dieser Drehung von 0° nach 30° vorgesehen ist, so dass zunächst der Lichtbogen im Löschkontaktsystem gelöscht wird und anschließend bei weiterer Drehung die dielektrische Trennstrecke erreicht ist.In a further advantageous embodiment of the invention, the first fixed contact and the second fixed contact on a circumferential extent with respect to a rotational movement of the moving contact of the main contact system such that between the moving contact of the main contact system and the first and second fixed contact of the switching device during a rotary movement of a switch-off a conductive Connection is formed during the initiation of the drive movement by guide member and cam track in the Bewegkontaktanschluss the vacuum interrupter for opening the extinguishing contact system and extinguishing the arc. Such a circumferential extent of the first and second fixed contact of the switching device allows in other words that when initiating a rotational movement for a switch-off of the switching device initially by means of the guide member and the cam track, a drive movement is introduced into the moving contact terminal pin of the extinguishing contact system in the form of the vacuum interrupter, so that the extinguishing contact system is first opened by means of the forced movement of the moving contact connecting bolt of the vacuum interrupter and an arc is extinguished, before the rotary movement is carried out further the moving contact of the main contact system of the moving contact of the main contact system interrupts the conductive connection with the first fixed contact and the second fixed contact of the switching device and forms a dielectric separation path, which is formed by the distance formed in the open state between the moving contact of the main contact system and the first and second fixed contact and the open contact system of the vacuum interrupter is formed. Thus, for example, in a switching device according to the invention, which reaches after a 90 ° rotation of the rotatable moving contact from the closed position a switch-off with trained dielectric separation distance, the circumferential extent of the first and second fixed contact preferably about 0 ° to 30 °, wherein the curved path is provided for initiating the forced movement in the Bewegkontaktanschlussbolzen the extinguishing contact system in the range of this rotation from 0 ° to 30 °, so that first the arc is extinguished in the extinguishing contact system and then the dielectric separation distance is reached upon further rotation.

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 connecting bolt 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 configuration, 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 path to the first and second fixed contact below, so that only when the closed vacuum interrupter or closed extinguishing contact system, an arc in the main contact system can be ignited, of which the vacuum interrupter but not affected with their closed contact system is, which means that this is inexpensive not einschaltfest executable.

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

Figur 1:
eine dreidimensionale Ansicht eines erfindungsgemäßen Schaltgerätes;
Figur 2:
eine Schnittansicht durch das erfindungsgemäße Schaltgerät in einer ersten Schaltstellung;
Figur 3:
eine Schnittansicht durch das erfindungsgemäße Schaltgerät in einer zweiten Schaltstellung;
Figur 4:
eine Schnittansicht durch das erfindungsgemäße Schaltgerät in einer dritten Schaltstellung;
Figur 5:
eine Schnittansicht durch das erfindungsgemäße Schaltgerät in einer vierten Schaltstellung;
Figur 6:
ein Ausführungsbeispiel eines erfindungsgemäßen dreipoligen Schaltgerätes;
Figur 7:
eine weitere Schnittansicht des erfindungsgemäßen Schaltgerätes kombiniert mit einem Erdungsschalter; und
Figur 8:
das Schaltgerät der Figur 7 in einer zweiten Schaltstellung.
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 three-dimensional view of a switching device according to the invention;
FIG. 2:
a sectional view through the switching device according to the invention in a first switching position;
FIG. 3:
a sectional view through the switching device according to the invention in a second switching position;
FIG. 4:
a sectional view through the switching device according to the invention in a third switching position;
FIG. 5:
a sectional view through the switching device according to the invention in a fourth switching position;
FIG. 6:
An embodiment of a three-pole switching device according to the invention;
FIG. 7:
a further sectional view of the switching device according to the invention combined with a grounding switch; and
FIG. 8:
the switching device of FIG. 7 in a second switching position.

Figur 1 zeigt ein Schaltgerät 1 in Form eines Lasttrenn-Drehschalters 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 an Kopplungsseiten 6 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 Figuren 2 bis 5 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. Der erste Festkontakt 2 und der zweite Festkontakt 3 weisen eine umfängliche Ausdehnung auf, durch welche gewährleistet ist, dass bei einer Drehbewegung des Bewegkontaktes 4 eine leitende Verbindung zwischen dem ersten Festkontakt 2 und dem zweiten Festkontakt 3 während eines Ausschaltvorganges so lange aufrecht erhalten ist, bis über die Zwangsbewegung des Bewegkontakt-Anschlussbolzens 9, eingeleitet durch die Kurvenbahn 12 und das Führungselement 11 der Schaltbrücke 10 das Löschkontaktsystem geöffnet und ein Lichtbogen in der Vakuumschaltröhre 7 gelöscht ist. Im Ausführungsbeispiel beträgt die umfängliche Ausdehnung von erstem und zweiten Festkontakt 2 und 3 ausgehend von der in der Figur 1 dargestellten Position des drehbaren Bewegkontaktes bei 0° bis etwa 30°, so dass bei eingeleiteter Drehbewegung in den Drehstützer 5 bei einer Drehung des drehbaren Bewegkontaktes 4 dieser mit erstem und zweitem Festkontakt bis etwa zu einer Drehung um 30° in Kontakt bleibt, während der die Kurvenbahn 12 auf dieser 30°-Drehung so ausgestaltet ist, dass die Zwangsbewegung zum Öffnen des Kontaktsystems der Vakuumschaltröhre 7 und zum Löschen des Lichtbogens führt. FIG. 1 shows a switching device 1 in the form of a load-disconnect rotary switch 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, for example, to connect to a outgoing terminal the switchgear is provided. 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 on coupling sides 6 for introducing a rotational movement in the rotary support 5 and execution of a rotary movement of the rotary Bewegkontaktes 4 and provided for optionally forming a conductive connection between the first fixed contact 2 and the second fixed contact 3, as in 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 FIGS. 2 to 5 explained in more detail below. Arranged in the rotary support 5 and integrated into the moving contact 4 is 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 directly to the rotating movable contact 4. 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 terminal pin 9, a contact pressure spring 15 is further arranged, which in the closed state to expend the necessary Kontaktandruckkraft on the Extinguishing contact system is provided. The first fixed contact 2 and the second fixed contact 3 have a circumferential extent, by which it is ensured that during a rotary movement of the moving contact 4, a conductive connection between the first fixed contact 2 and the second fixed contact 3 is maintained during a switch-off until via the forced movement of the moving contact connecting pin 9, initiated by the cam track 12 and the guide element 11 of the switching bridge 10, the extinguishing contact system opened and an arc in the vacuum interrupter 7 is deleted. In the exemplary embodiment, the circumferential extent of the first and second fixed contact 2 and 3, starting from in the FIG. 1 shown position of the rotatable moving contact at 0 ° to about 30 °, so that when initiated rotary motion in the rotary support 5 at a rotation of the rotatable moving contact 4 with first and second fixed contact remains approximately in contact with a rotation of 30 °, while the Curved track 12 is designed on this 30 ° rotation so that the forced movement leads to the opening of the contact system of the vacuum interrupter 7 and to extinguish the arc.

Die Funktion des Schaltgerätes 1 der Figur 1 wird mit Bezug auf die Figuren 2 bis 5 näher erläutert. In Figur 2 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 ersten 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 erste Ausschaltstellung bei 90° wie in Figur 3 dargestellt bewegt, wobei zunächst während der Drehbewegung durch die umfängliche Ausdehnung des ersten Festkontaktes 2 und des zweiten Festkontaktes 3 der drehbare Bewegkontakt 4 in leitender Verbindung mit dem ersten Festkontakt 2 und dem zweiten Festkontakt 3 verbleibt, während 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, wodurch ein Lichtbogen in der Vakuumschaltröhre 7 brennt und in einem Stromnulldurchgang gelöscht wird, und anschließend die weitere Drehbewegung bei gelöschtem Lichtbogen und geöffnetem Löschkontaktsystem der Vakuumschaltröhre 7 zur Trennung des Hauptkontaktsystems führt, indem der drehbare Bewegkontakt 4 des Hauptkontaktsystems die leitende Verbindung mit dem ersten Festkontakt 2 und dem zweiten Festkontakt 3 unterbricht und schließlich die in der Figur 3 dargestellte erste Ausschaltstellung einnimmt, welche die Anforderungen an eine dielektrische Trennstrecke an den Lasttrennschalter erfüllt. Aus der ersten Ausschaltstellung der Figur 3 ist ein Einschaltvorgang mittels weiter 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 zweite Einschaltstellung des Schaltgerätes 1 der Figur 4 erreicht ist, bei der sich der drehbare Bewegkontakt 4 in einer um 180° gedrehten Stellung im Vergleich zu der Figur 2 befindet.The function of the switching device 1 of FIG. 1 will be related to the FIGS. 2 to 5 explained in more detail. In FIG. 2 is the switching device 1 of FIG. 1 shown in a closed position in which the rotatable moving contact 4 is in a 0 ° position in a first closed position in contact with the first fixed contact 2 and the second fixed contact 3 and the extinguishing contact system of the vacuum interrupter 7 with the Erschbewegkontakt 17 and the erase fixed contact 18th is also in its closed position. When a switching operation by a control unit, not shown, a rotational movement in the drive shaft and coupled to the drive shaft rotary support 5 is initiated, so that the rotatable moving contact 4 moves to the first off position at 90 ° as shown in Figure 3, wherein initially during the rotational movement through the circumferential extent of the first fixed contact 2 and the second fixed contact 3 of the rotatable moving contact 4 in conductive connection with the first fixed contact 2 and the second fixed contact 3 remains, while the guide member 11 of the switching bridge 10 in the curved path 12 of the pole housing 13 is caused to force and the moving contact terminal pin. 9 the extinguishing contact system of the vacuum interrupter 7 for opening the extinguishing contact system and the separation of extinguishing contact 17 and extinguishing contact 18 causes, whereby an arc in the vacuum interrupter 7 burns and is extinguished in a zero crossing, and then the further rotation with the arc extinguished and the extinguishing contact system of the vacuum interrupter 7 to Separation of the main contact system leads by the rotatable moving contact 4 of the main contact system interrupts the conductive connection with the first fixed contact 2 and the second fixed contact 3 and finally the in the FIG. 3 illustrated first off position occupies, which meets the requirements of a dielectric separation path to the load-break switch. From the first off position of the FIG. 3 is a switch-on by means of further rotation of the drive shaft and the rotary support 5 executable such that on the design of the cam track 12 when rotating the rotatable moving contact 4 initially on the introduced into the guide element 11 of the switching bridge 10 forced movement in the moving contact connecting pin 9, the extinguishing contact system of the vacuum interrupter 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 second closed position of the switching device 1 of FIG. 4 is achieved, in which the rotatable moving contact 4 in a rotated position by 180 ° in comparison to the FIG. 2 located.

Figur 5 zeigt das Schaltgerät 1 in einer zweiten Ausschaltstellung, wobei ein Ausschaltvorgang entsprechend dem mit Bezug auf die Figuren 2 und 3 bereits beschriebenen Ausschaltvorgang ausgeführt wurde. In der zweiten Ausschaltstellung befindet sich somit der drehbare Bewegkontakt 4 in einer um 180° gegenüber der Figur 3 gedrehten Position bzw. in einer um 270° gegenüber der Figur 2 gedrehten Position. FIG. 5 shows the switching device 1 in a second switch-off position, wherein a switch-off operation corresponding to that with reference to the FIGS. 2 and 3 already described shutdown was performed. In the second switch-off position is thus the rotatable moving contact 4 in a 180 ° relative to the FIG. 3 rotated position or in a 270 ° relative to the FIG. 2 rotated position.

Bei einem derartig ausgebildeten Schaltgerät ist es also möglich, durch Einleiten einer Drehbewegung in immer die gleiche Richtung, wie mit dem Pfeil im Uhrzeigersinn in den Figuren 2 bis 5 dargestellt, Ein- und Ausschaltvorgänge des Lasttrenn-drehschalters im Wechsel durch Drehungen um 90° auszuführen, weil durch die umfängliche Ausdehnung von erstem und zweitem Festkontakt 2 und 3 und die unterschiedliche Ausgestaltung der Kurvenbahn 12 für die unterschiedlichen Phasen der Schaltvorgänge eine Bewegungsumkehr nicht benötigt wird, indem durch die Ausgestaltung von erstem und zweitem Festkontakt 2 und 3 und die Ausgestaltung der Kurvenbahn 12 die notwendigen Schaltvorgänge bzw. Schalthandlungen realisierbar sind.In such a trained switching device, it is therefore possible by initiating a rotational movement in always the same direction as with the arrow in the clockwise direction in the FIGS. 2 to 5 shown to perform on and off operations of the load-disconnect rotary switch in rotation by rotation by 90 °, because the circumferential expansion of the first and second fixed contact 2 and 3 and the different configuration of the cam track 12 for the different phases of the switching operations, a reversal of motion is not needed in that the necessary switching operations or switching operations can be realized by the configuration of the first and second fixed contact 2 and 3 and the configuration of the curved path 12.

Figur 6 zeigt eine dreipolige Ausführung eines Lasttrenn-Drehschalters mit drei Einzelpolen gemäß dem in den Figuren 1 bis 5 beschriebenen Schaltgerät 1, welche über Kopplungselemente 19 miteinander gekoppelt sind, so dass über die Kopplungselemente 19 und die Anbindung der jeweils äußeren Drehstützer 5 an Kopplungsseiten 6 an eine figürlich nicht dargestellte Antriebswelle ein synchroner Schaltvorgang für alle drei Phasen ausführbar ist. FIG. 6 shows a three-pole version of a load-disconnect rotary switch with three single poles according to the in FIGS. 1 to 5 described switching device 1, which are coupled to each other via coupling elements 19, so that via the coupling elements 19 and the connection of the respective outer rotary support 5 on coupling sides 6 to a drive shaft not shown figuratively a synchronous switching operation for all three phases is executable.

Figur 7 zeigt eine Kombination des Schaltgerätes 1 mit einem separaten Erdungsschalter 20, welcher einen schwenkbaren Kontakt 21 aufweist, mit dem über eine separate Erder-Antriebswelle 22 eine wie in Figur 8 dargestellte Erdungsposition eingenommen werden kann. FIG. 7 shows a combination of the switching device 1 with a separate earthing switch 20, which has a pivotal contact 21, with which via a separate earth drive shaft 22 a as in FIG. 8 shown grounding position can be taken.

Mit Bezug auf die Figuren 1 bis 8 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. Es ist aber auch im Rahmen der Erfindung möglich, eine einschaltfeste Vakuumröhre für das Löschkontaktsystem einzusetzen, so dass bei entsprechender Ausgestaltung von Kurvenbahn und ersten und zweiten Festkontakt es ermöglicht ist, einen Einschaltlichtbogen nicht zwischen dem drehbaren Bewegkontakt und dem ersten bzw. zweiten Festkontakt des Schaltgerätes zu zünden, sondern den Einschaltlichtbogen bei einschaltfester Vakuumröhre im Löschkontaktsystem zu zünden, so dass dadurch große strombedingte Gegenkräfte zwischen drehbarem Bewegkontakt und Festkontakten des Hauptkontaktsystems verhindert werden können, wodurch wiederum Antriebskräfte reduziert werden und der Antrieb insgesamt kostengünstiger ausgestaltet werden kann. 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 8 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 is ignited on the main contact system. 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. However, it is also possible within the scope of the invention to use a switch-on vacuum tube for the extinguishing contact system, so that it is possible with an appropriate design of curved path and first and second fixed contact, a Einschaltlichtbogen not between the rotatable moving contact and the first and second fixed contact of the switching device to ignite, but to ignite the Einschaltlichtbogen in einschaltfester vacuum tube in the extinguishing contact system, thereby large current-related opposing forces between rotating moving contact and fixed contacts of the main contact system can be prevented, which in turn reduces driving forces and the drive can be configured more cost-effective. 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
Schaltgerätswitchgear
22
erster Festkontaktfirst fixed contact
33
zweiter Festkontaktsecond fixed contact
44
drehbarer Bewegkontaktrotatable moving contact
55
Drehstützerrotary supporters
66
Kopplungsseitencoupling sides
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
Kopplungselementecoupling elements
2020
Erdungsschalterearthing switch
2121
schwenkbarer Kontaktswiveling contact
2222
Erder-AntriebswelleEarthing drive shaft

Claims (4)

  1. Switching device (1), in particular load interrupter, for medium-voltage switchgear assemblies, having a quenching contact system for quenching an arc in the event of a switch-off process of the switching device (1) and having a main contact system, which is connected in series with the quenching contact system, for forming a dielectric isolating distance in an open state of the main contact system and when the arc is quenched, wherein the main contact system has a first fixed contact (2) and a second fixed contact (3), which fixed contacts are diametrically opposite one another, and also a moving contact (4) which can be rotated by means of a rotation support (5), which is arranged centrally between the first fixed contact (2) and the second fixed contact (3), and has the quenching contact system integrated in it,
    characterized in that
    the moving contact (4) of the main contact system is designed such that it can be rotated through 360°.
  2. Switching device (1) according to Claim 1,
    characterized in that
    the quenching contact system is formed by a vacuum interrupter (7), wherein a moving contact connection bolt (9) of the vacuum interrupter (7) has a guide element (11) by which a drive movement for opening and, respectively, closing the quenching contact system can be introduced by means of a curved path (12) of the switching device (1).
  3. Switching device (1) according to Claim 2,
    characterized in that
    the first fixed contact (2) and the second fixed contact (3) have a circumferential extent with respect to a rotational movement of the moving contact (4) of the main contact system in such a way that a conductive connection is formed between the moving contact (4) of the main contact system and the first fixed contact (2) and the second fixed contact (3) of the switching device (1) during a rotational movement of a switch-off process during the introduction of the drive movement by guide element (11) and curved path (12) into the moving contact connection (9) of the vacuum interrupter (7) for opening the quenching contact system and quenching the arc.
  4. Switching device (1) according to one of the preceding claims,
    characterized in that
    the curved path (12) for introducing the drive movement into the moving contact connection bolt (9) for closing the quenching contact system during the rotational movement of a switch-on process of the switching device (1) is formed in such a way that a switch-on arc can be ignited only in the main contact system.
EP12716369.9A 2011-04-29 2012-04-18 Switching device Active EP2689446B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011017815A DE102011017815B3 (en) 2011-04-29 2011-04-29 switchgear
PCT/EP2012/057067 WO2012146517A1 (en) 2011-04-29 2012-04-18 Switching device

Publications (2)

Publication Number Publication Date
EP2689446A1 EP2689446A1 (en) 2014-01-29
EP2689446B1 true EP2689446B1 (en) 2017-05-31

Family

ID=46001215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12716369.9A Active EP2689446B1 (en) 2011-04-29 2012-04-18 Switching device

Country Status (4)

Country Link
EP (1) EP2689446B1 (en)
CN (1) CN103503105B (en)
DE (1) DE102011017815B3 (en)
WO (1) WO2012146517A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011087630B4 (en) * 2011-12-02 2016-11-03 Siemens Aktiengesellschaft switchgear
CN104253001B (en) * 2013-06-25 2016-06-08 施耐德电器工业公司 Miniature circuit breaker
WO2015021010A1 (en) * 2013-08-05 2015-02-12 Faulkner Roger W Commutating switch with blocking semiconductor
US10014139B2 (en) * 2015-09-02 2018-07-03 General Electric Company Over-current protection assembly
CN107845511A (en) * 2017-10-10 2018-03-27 上海良信电器股份有限公司 The moving contact insulating trip of electrical rotary switch
FR3121267A1 (en) 2021-03-24 2022-09-30 Schneider Electric Industries Sas Switching system of an electrical device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469203A (en) * 1945-12-04 1949-05-03 Gen Electric Electric switch
DE2934776C2 (en) * 1979-08-28 1982-05-06 Siemens AG, 1000 Berlin und 8000 München Medium voltage switch disconnectors.
DE3611270C2 (en) * 1986-04-04 1995-08-17 Sachsenwerk Ag Electrical switching device for high switching voltages
FR2735899B1 (en) * 1995-06-22 1997-08-01 Gec Alsthom T & D Sa SELF-DISCONNECTOR SWITCH
DE202010009448U1 (en) * 2010-06-23 2010-09-09 Ipt International Power & Technology Gmbh High voltage switching device

Also Published As

Publication number Publication date
DE102011017815B3 (en) 2012-10-11
EP2689446A1 (en) 2014-01-29
CN103503105B (en) 2015-12-23
CN103503105A (en) 2014-01-08
WO2012146517A1 (en) 2012-11-01

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