EP2766914A1 - Switching device - Google Patents

Switching device

Info

Publication number
EP2766914A1
EP2766914A1 EP12799517.3A EP12799517A EP2766914A1 EP 2766914 A1 EP2766914 A1 EP 2766914A1 EP 12799517 A EP12799517 A EP 12799517A EP 2766914 A1 EP2766914 A1 EP 2766914A1
Authority
EP
European Patent Office
Prior art keywords
contact
contact system
extinguishing
fixed
switching device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12799517.3A
Other languages
German (de)
French (fr)
Other versions
EP2766914B1 (en
Inventor
Stefan Wolf
Rene Zlydnik
Stefan Hohmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP2766914A1 publication Critical patent/EP2766914A1/en
Application granted granted Critical
Publication of EP2766914B1 publication Critical patent/EP2766914B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • 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 an extinguishing contact system for extinguishing an arc at a switch-off of the switching device and a connected to the extinguishing contact system in series main contact system for forming a dielectric separation gap in an open state of the main ⁇ contact system and extinguished arc, and a grounding contact system ,
  • an extinguishing contact system for extinguishing an arc in the form of a vacuum interrupter for a circuit breaker, 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 arc extinguished in the form ei ⁇ pivotal 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 a driving movement ⁇ in a moving contact of the vacuum interrupter of the extinguishing contact system can be introduced, so that at a turn-off the switching device via the cam the extinguishing contact system is opened and an arc is extinguished before the main contact system in its open state under Ausbil tion of a dielectric separation path is transferred.
  • Object of the present invention is to provide a switching device of the type mentioned, which has a compact design. According to the invention this is achieved in a three-position load ⁇ disconnector of the type mentioned in that the main contact system a first fixed contact and a second fixed contact, which are diametrically opposed, and a NEN means of a centrally disposed between the first and second fixed contact rotary support rotatable moving contact with integrated therein extinguishing contact system.
  • the three-position circuit breaker according to the invention is in other words in the form of a Dreiwolfslasttrenn 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 to interrupt the connection between the first and the second fixed contact, and has by the integrated in the rotatable moving contact erg contact system a compact design, because the extinguishing contact system is part of the moving contact of Hauptkon ⁇ is clock system , so that the space requirement compared to separate, spatially sequentially arranged components is significantly reduced.
  • Such trained load-disconnecting 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, where ⁇ at 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 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.
  • Erase contact system can be used advantageously in the switching device, a non-turn-off 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 necessary distance to form a dielectric separation distance to the first and second fixed contact is undershot, so that only when the vacuum interrupter is closed 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, which is inexpensive einschaltfest not executable bar.
  • the grounding contact system is formed by a ground contact, a ground counter contact, which are diametrically opposite, and the rotatable moving contact.
  • Figure 1 shows a three-position load disconnect rotary switch 1 with a first fixed contact 2, for example, provided for connection to a busbar terminal 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 Abgangsan- the circuit Switchgear is provided.
  • a rotatable moving ⁇ contact 4 is coupled by means of a centrally between the first fixed contact 2 and the second fixed contact 3 arranged 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 rotatable moving contact 4 and provided for selectively forming a conductive connection between the first fixed contact 2 and the second fixed contact 3, as shown in Figure 1, or for breaking the conductive connection between the first fixed contact 2 and the second fixed contact 3, as with reference to the figure 2, or for forming a grounding position via a grounding contact 6 for grounding switchgear parts electrically connected to the second fixed contact 3, as explained in greater detail below with reference to FIG.
  • an extinguishing contact system in the form of a vacuum interrupter 7 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 Bewegkon ⁇ clock terminal bolt 9 of the vacuum interrupter 7 is mechanically coupled to a contact bridge 10, which for actuating the moving contact terminal shaft 9 of the vacuum interrupter 7 and for introducing a drive movement in the BewegWallet- connecting pin 9 for opening or closing the clear contact system of the vacuum interrupter 7 is provided.
  • the switching ⁇ bridge 10 has for this purpose a guide member 11 in the form of at ⁇ game as a roller or a projection on which guide element engages in a cam track 12 of yoke 13 11, so that upon initiation of a rotational movement into the rotary moving contact 4 through the guide member 11
  • a guide sleeve 14 is provided for the axial guidance of the moving contact connecting bolt 9 and for receiving radial loads on the vacuum interrupter 7.
  • a contact pressure spring 15 is furthermore arranged, which is provided in the closed state for applying the necessary contact pressure to the extinguishing contact system.
  • the switching device 1 of Figure 1 is shown in a closed position in which the rotatable moving contact 4 is in egg ⁇ ner 0 ° position in a closed position in contact with the first fixed contact 2 and the second fixed contact 3 and the extinguishing contact system the vacuum interrupter 7 with the deletion contact 17 and the erase contact 18 is just ⁇ if in its closed position.
  • Figure 4 shows a three-pole version of a load-disconnect rotary switch 1 with three individual poles according to the three-position circuit breaker 1 described in Figures 1 to 3, wel ⁇ che coupled via coupling elements 20 to each other, so that via the coupling elements 20 and the connection of je ⁇ Weils outer Side of the rotary support 5 on coupling sides 21 to a drive shaft, not shown figuratively a syn ⁇ chronous switching operation for all three phases is executable.
  • the grounding contacts 6 of the three phases are connected ver ⁇ and to ground via a connecting element 22 with each other.
  • a switching device 1 has been described intracsbei ⁇ play, in which the vacuum switch tube 7 is guided as not einschaltfeste vacuum interrupter from ⁇ , ie the vacuum interrupter 7 is already closed during a switch-on operation of the switching device 1, before a Starting arc ignited on the main contact system becomes.
  • a vacuum interrupter that does not turn ⁇ fixed and therefore can not be switched to a load current or a short circuit, is particularly inexpensive and therefore advantageous.
  • the switching device 1 is preferential example for assembly with an insulating gas, such as N2, filled gas space of a medium-voltage switchgear ⁇ provided in a.

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)

Abstract

In order to form a three-position load isolating switch (1) for medium-voltage switchgear assemblies with an extinguishing contact system 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 with the extinguishing contact system, for forming a dielectric isolating gap in an open state of the main contact system and an extinguished arc, and having an earthing contact system, which three-position load isolating switch has a compact structure, the invention proposes that the main contact system has a first fixed contact (2) and a second fixed contact (3), which fixed contacts are situated diametrically opposite one another, and has 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 which has the extinguishing contact system integrated in it.

Description

Schaltgerät switchgear
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 Haupt¬ kontaktsystems und gelöschtem Lichtbogen, und einem Erdungs- kontaktsystem. The invention relates to a three-position circuit breaker for medium-voltage switchgear with an extinguishing contact system for extinguishing an arc at a switch-off of the switching device and a connected to the extinguishing contact system in series main contact system for forming a dielectric separation gap in an open state of the main ¬ contact system and extinguished arc, and a grounding contact system ,
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 ei¬ nes 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 An¬ triebsbewegung 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 one known from the prior art, three-position circuit breaker an extinguishing contact system for extinguishing an arc in the form of a vacuum interrupter is provided for a circuit breaker, 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 arc extinguished in the form ei ¬ pivotal 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 a driving movement ¬ in a moving contact of the vacuum interrupter of the extinguishing contact system can be introduced, so that at a turn-off the switching device via the cam the extinguishing contact system is opened and an arc is extinguished before the main contact system in its open state under Ausbil tion of a dielectric separation path is transferred.
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 Dreistellungslast¬ trennschalter der eingangs genannten Art dadurch, dass das Hauptkontaktsystem einen ersten Festkontakt und einen zweiten Festkontakt, welche sich diametral gegenüberstehen, sowie ei- nen mittels eines mittig zwischen dem ersten und dem zweiten Festkontakt angeordneten Drehstützers drehbaren Bewegkontakt mit darin integriertem Löschkontaktsystem aufweist. Der erfindungsgemäße Dreistellungslasttrennschalter ist mit anderen Worten in Form eines Dreistellungslasttrenn-Dreh- schalters 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 integ- rierte Löschkontaktsystem einen kompakten Aufbau auf, weil das Löschkontaktsystem Teil des Bewegkontaktes des Hauptkon¬ taktsystems 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. Object of the present invention is to provide a switching device of the type mentioned, which has a compact design. According to the invention this is achieved in a three-position load ¬ disconnector of the type mentioned in that the main contact system a first fixed contact and a second fixed contact, which are diametrically opposed, and a NEN means of a centrally disposed between the first and second fixed contact rotary support rotatable moving contact with integrated therein extinguishing contact system. The three-position circuit breaker according to the invention is in other words in the form of a Dreistellungslasttrenn 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 to interrupt the connection between the first and the second fixed contact, and has by the integrated in the rotatable moving contact erg contact system a compact design, because the extinguishing contact system is part of the moving contact of Hauptkon ¬ is clock system , so that the space requirement compared to separate, spatially sequentially arranged components is significantly reduced. Such trained load-disconnecting 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, wo¬ bei 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 Zusam¬ menwirken mit der Kurvenbahn des Schaltgerätes, welche bei¬ spielsweise an einem Polgehäuse eines Pols des Schaltgerätes vorgesehen sein kann, in einfacher Weise eine Antriebsbewe- gung als Zwangsbewegung in den Bewegkontakt-Anschlussbolzen eingeleitet, so dass bei Ausführen einer Drehbewegung des Be¬ wegkontaktes des Hauptkontaktsystems das Löschkontaktsystem in Form der Vakuumschaltröhre in einfacher Weise durch Aus- gestaltung der Kurvenbahn entsprechend den Anforderungen an das Schaltgerät zum Öffnen bzw. Schließen des Löschkontakt¬ systems veranlasst werden kann. 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 Schalt¬ gerätes 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 In an advantageous embodiment of the invention, the extinguishing contact system is formed by a vacuum interrupter, where ¬ at 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. Is, in other words by the arranged on the moving contact terminal bolt of the vacuum interrupter guide element together ¬ menwirken with the cam track of the switching device, which ¬ may be provided on a pole housing of a pole of the switching device in play, in a simple manner Antriebsbewe- supply as a forced movement in the Moving contact terminal bolt introduced, so that when executing a rotational movement of Be ¬ wegkontaktes the main contact system, the extinguishing contact system in the form of the vacuum interrupter in a simple manner by Design of the curved path according to the requirements of the switching device for opening or closing the extinguishing contact ¬ system can be initiated. 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 separating contact and curved path for initiating the drive movement in the Bewegkontaktanschlussbolzen of
Löschkontaktsystems kann in vorteilhafter Weise eine nicht- einschaltfeste 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 unterschrei- tet, 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 ausführ- bar ist. Erase contact system can be used advantageously in the switching device, a non-turn-off 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 necessary distance to form a dielectric separation distance to the first and second fixed contact is undershot, so that only when the vacuum interrupter is closed 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, which is inexpensive einschaltfest not executable bar.
In einer besonders vorteilhaften Ausgestaltung der Erfindung ist das Erdungskontaktsystem durch einen Erdungskontakt, einen Erdungsgegenkontakt, welche sich diametral gegenüberste- hen, 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 grounding contact system is formed by a ground contact, a ground counter contact, which are diametrically opposite, 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 Fi¬ guren näher erläutert. Es zeigen: eine Schnittansicht durch den erfindungsgemäßen Dreistellungslasttrennschalter in einer ersten SchaltStellung; eine Schnittansicht durch den erfindungsgemäßen Dreistellungslasttrennschalter in einer zweiten SchaltStellung; eine Schnittansicht durch den erfindungsgemäßen Dreistellungslasttrennschalter in einer dritten Schaltstellung; und eine Ansicht eines dreiphasigen Dreistellungslast trennschalters . The invention is explained below with reference to drawings and an embodiment with reference to the accompanying ¬ Fi gures in more detail. Show it: a sectional view through the three-position circuit breaker according to the invention in a first switching position; a sectional view through the three-position switch-disconnector according to the invention in a second switching position; a sectional view through the three-position switch-disconnector according to the invention in a third switching position; and a view of a three-phase three-position load disconnector.
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 Fest¬ kontakt 2 diametral gegenüberliegenden zweiten Festkontakt 3, welcher beispielsweise zum Verbinden mit einem Abgangsan- schluss der Schaltanlage vorgesehen ist. Ein drehbarer Beweg¬ kontakt 4 ist mittels eines mittig zwischen dem ersten Fest- kontakt 2 und dem zweiten Festkontakt 3 angeordneten Dreh- stützers 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 ei- ner 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 Bewegkon¬ takt-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 Schalt¬ brücke 10 weist dazu ein Führungselement 11 in Form bei¬ spielsweise 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 Füh- rungshülse 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 Zu- stand zur Aufwendung der nötigen Kontaktandruckkraft auf das Löschkontaktsystem vorgesehen ist. Figure 1 shows a three-position load disconnect rotary switch 1 with a first fixed contact 2, for example, provided for connection to a busbar terminal 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 Abgangsan- the circuit Switchgear is provided. A rotatable moving ¬ contact 4 is coupled by means of a centrally between the first fixed contact 2 and the second fixed contact 3 arranged 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 rotatable moving contact 4 and provided for selectively forming a conductive connection between the first fixed contact 2 and the second fixed contact 3, as shown in Figure 1, or for breaking the conductive connection between the first fixed contact 2 and the second fixed contact 3, as with reference to the figure 2, or for forming a grounding position via a grounding contact 6 for grounding switchgear parts electrically connected to the second fixed contact 3, as explained in greater detail below with reference to FIG. 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 Bewegkon ¬ clock terminal bolt 9 of the vacuum interrupter 7 is mechanically coupled to a contact bridge 10, which for actuating the moving contact terminal shaft 9 of the vacuum interrupter 7 and for introducing a drive movement in the Bewegkontakt- connecting pin 9 for opening or closing the clear contact system of the vacuum interrupter 7 is provided. The switching ¬ bridge 10 has for this purpose a guide member 11 in the form of at ¬ game as a roller or a projection on which guide element engages in a cam track 12 of yoke 13 11, so that upon initiation of a rotational movement into the rotary moving contact 4 through the guide member 11 A guide sleeve 14 is provided for the axial guidance of the moving contact connecting bolt 9 and for receiving radial loads on the vacuum interrupter 7. Between the switching bridge 10 and the moving contact connecting pin 9, a contact pressure spring 15 is furthermore arranged, which is provided in the closed state for applying the necessary contact pressure to 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 ei¬ ner 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 eben¬ falls in seiner geschlossenen Stellung befindet. Beim Auslösen eines Schaltvorganges durch eine figürlich nicht darge¬ stellte Steuerungseinheit wird eine Drehbewegung in die An- triebswelle und den mit der Antriebswelle gekoppelten Dreh- stützer 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, wo- bei 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 Vakuumschalt- röhre 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 The function of the switching device 1 of Figure 1 will be explained in more detail with reference to Figures 1 to 3. In Figure 1, the switching device 1 of Figure 1 is shown in a closed position in which the rotatable moving contact 4 is in egg ¬ ner 0 ° position in a closed position in contact with the first fixed contact 2 and the second fixed contact 3 and the extinguishing contact system the vacuum interrupter 7 with the deletion contact 17 and the erase contact 18 is just ¬ if in its closed position. When triggering a switching operation by a figurative not Darge ¬ set control unit includes a rotational movement is in the check- drive shaft 5 and coupled to the drive shaft rotary support 5 introduced so that the rotatable moving contact 4 moves to the off position after a rotation of approximately 45 ° counterclockwise as shown in Figure 2, wherein during the rotational movement and after separation of the moving contact 4 of the fixed contacts 2 and 3, the guide member 11 of the switching bridge 10 in the curved path 12 of the pole housing 13 is forced to move and the Bewegkontakt- connection pin 9 of the extinguishing contact system of Vakuumschalt- tube 7 to open the extinguishing contact system and the separation of Erschbewegkontakt 17th 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 a
Lichtbogen in der Vakuumschaltröhre 7, welcher in einem Arc in the vacuum interrupter 7, which in a
Stromnulldurchgang gelöscht wird. Durch die weitere Drehbewe¬ gung 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 Last- trennschalter erfüllt. Current zero crossing is cleared. By further Drehbewe ¬ supply at slaked arc extinguishing open and contact system of the vacuum interrupter 7 finally the off position shown in Figure 2 is achieved, which isolating switch meets the requirements of a dielectric separating path to the load.
Aus der Ausschaltstellung der Figur 2 ist ein Einschaltvorgang mittels einer umgekehrten Drehbewegung der Antriebswelle und des Drehstützers 5 derart ausführbar, dass über die Ges- taltung 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 Ein¬ schaltlichtbogen 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. 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 ent- gegen dem Uhrzeigersinn um im Ausführungsbeispiel ca. 60° zur Drehung des Drehstützers 5 das Führungselement 11 der Schalt¬ brücke 10 in der Kurvenbahn 12 des Polgehäuses 13 zu einer weiteren Zwangsbewegung veranlasst ist und den Bewegkontakt- Anschlussbolzen 9 des Löschkontaktsystems der Vakuumschalt- röhre 7 zum Schließen des Löschkontaktsystems aus Löschbeweg¬ kontakt 17 und Löschfestkontakt 18 veranlasst. Bei dieser Drehbewegung gelangt der Bewegkontakt 4 einerseits in leiten¬ de Verbindung mit einem Erdungsgegenkontakt 19, welcher wie¬ derum mit dem zweiten Festkontakt 3 elektrisch leitend ver- bunden ist, sowie andererseits in leitende Verbindung mit dem Erdungskontakt 6, so dass bei geschlossenem Löschkontaktsys¬ tem der Vakuumschaltröhre 7 die in der Figur 3 dargestellte Erdungsstellung erreicht ist mit einer Erdung von mit dem zweiten Festkontakt verbundenen Bauteilen der Schaltanlage. From the switch-off position of Figure 2, a switch-on by means of a reverse rotational movement of the drive shaft and the rotary support 5 is executable such that on the design of the cam track 12 when turning the rotatable moving contact 4 initially on the introduced into the guide member 11 of the switching bridge 10 forced movement in the moving contact terminal pin 9 is the extinguishing contact system of the vacuum interrupter 7 via the contact pressure spring 15 is closed before the rotatable moving contact 4 re-enters a conductive connection with the first fixed contact 2 and the second fixed contact 3 of the main contact system, so that a one ¬ switching arc between the rotatable moving contact 4 and the first fixed contact 2 and the second fixed contact 3 is ignited in the already closed extinguishing contact system of the vacuum interrupter 7, and finally on further rotational movement, the closed position of the Dreisstellungslasttrennschalters 1 of Figure 1 is reached again , Figure 3 shows the switching device 1 in a grounding position, wherein after the switching operation already described with reference to Figure 2, a further rotation of the drive shaft counterclockwise in the exemplary embodiment about 60 ° to the rotation of the rotary support 5, the guide element 11 of the switching ¬ bridge 10 in the cam track 12 of the pole housing 13 is caused to a further forced movement and the Bewegkontakt- connection pin 9 of the extinguishing contact system of Vakuumschalt- tube 7 for closing the extinguishing contact system from Erase ¬ contact 17 and erase fixed contact 18 causes. During this rotational movement of the moving contact 4 passes on the one hand in ¬ direct connection with a grounding counter-contact 19, which in turn is ¬ electrically connected to the second fixed contact 3, and on the other hand in a conductive connection with the ground contact 6, so that when Löschkontaktsys ¬ closed tem of the vacuum interrupter 7, the grounding position shown in Figure 3 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, wel¬ che über Kopplungselemente 20 miteinander gekoppelt sind, so dass über die Kopplungselemente 20 und die Anbindung der je¬ weils äußeren Seiten der Drehstützer 5 an Kopplungsseiten 21 an eine figürlich nicht dargestellte Antriebswelle ein syn¬ chroner Schaltvorgang für alle drei Phasen ausführbar ist. Die Erdungskontakte 6 der drei Phasen sind dabei über ein Verbindungselement 22 miteinander und mit Erdpotential ver¬ bunden . Figure 4 shows a three-pole version of a load-disconnect rotary switch 1 with three individual poles according to the three-position circuit breaker 1 described in Figures 1 to 3, wel ¬ che coupled via coupling elements 20 to each other, so that via the coupling elements 20 and the connection of je ¬ Weils outer Side of the rotary support 5 on coupling sides 21 to a drive shaft, not shown figuratively a syn ¬ chronous switching operation for all three phases is executable. The grounding contacts 6 of the three phases are connected ver ¬ and to ground via a connecting element 22 with each other.
Mit Bezug auf die Figuren 1 bis 4 wurde im Ausführungsbei¬ spiel ein Schaltgerät 1 beschrieben, bei dem die Vakuum- schaltröhre 7 als nicht einschaltfeste Vakuumschaltröhre aus¬ geführt 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 einschalt¬ fest und damit nicht auf einen Laststrom oder einen Kurz- schluss geschaltet werden kann, ist besonders kostengünstig und damit vorteilhaft. Das Schaltgerät 1 ist dabei vorzugs- weise zur Anordnung in einem mit einem Isolationsgas, wie beispielsweise N2, gefüllten Gasraum einer Mittelspannungs¬ schaltanlage vorgesehen. With reference to Figures 1 to 4, a switching device 1 has been described in Ausführungsbei ¬ play, in which the vacuum switch tube 7 is guided as not einschaltfeste vacuum interrupter from ¬, ie the vacuum interrupter 7 is already closed during a switch-on operation of the switching device 1, before a Starting arc ignited on the main contact system becomes. Such a vacuum interrupter that does not turn ¬ fixed and therefore can not be switched to a load current or a short circuit, is particularly inexpensive and therefore advantageous. The switching device 1 is preferential example for assembly with an insulating gas, such as N2, filled gas space of a medium-voltage switchgear ¬ provided in a.
Bezugs zeichenliste Reference sign list
1 Dreistellungslasttrennschalter 1 three-position switch-disconnector
2 erster Festkontakt  2 first fixed contact
3 zweiter Festkontakt  3 second fixed contact
4 drehbarer Bewegkontakt  4 rotatable moving contact
5 Drehstützer  5 rotary supports
6 Erdungskontakt  6 earthing contact
7 Vakuumsehaltröhre  7 vacuum tube
8 Festkontakt-Anschlussbolzen Vakuumsehaltröhre 8 fixed contact connection bolts vacuum tube
9 Bewegkontakt-Anschlussbolzen Vakuumsehaltröhre9 moving contact connecting bolt vacuum tube
10 Schaltbrücke 10 switching bridge
11 Führungselement  11 guide element
12 Kurvenbahn  12 curved path
13 Polgehäuse  13 pole housing
14 Führungshülse  14 guide sleeve
15 Kontaktdruckfeder  15 contact pressure spring
17 Löschbewegkontakt  17 extinguishing contact
18 Löschfestkontakt  18 extinguishing contact
19 Erdungsgegenkontakt  19 ground contact contact
20 Kopplungselemente  20 coupling elements
21 KopplungsSeiten  21 coupling pages
22 Verbindungselement  22 connecting element

Claims

Patentansprüche claims
1. Dreistellungslasttrennschalter (1) für Mittelspannungsschaltanlagen mit einem Löschkontaktsystem zum Löschen eines Lichtbogens bei einem Ausschaltvorgang des Schaltgerätes (1) 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, d a d u r c h g e k e n n z e i c h n e t , d a s s das Hauptkontaktsystem einen ersten Festkontakt (2) und einen zweiten Festkontakt (3) , welche sich diametral gegenüberste¬ hen, sowie einen mittels einer mittig zwischen dem ersten Festkontakt (2) und dem zweiten Festkontakt (3) angeordneten Drehstützers (5) drehbaren Bewegkontakt (4) mit darin integ¬ riertem Löschkontaktsystem aufweist. A three-position switch-disconnector (1) for medium-voltage switchgear with a quenching contact system for extinguishing an arc at a turn-off of the switching device (1) and connected to the quenching system in series main contact system for forming a dielectric separation gap in an open state of the main contact system and extinguished arc, and a grounding contact system characterized in that the main contact system (a first fixed contact (2) and a second fixed contact (3) extending diametrically gegenüberste ¬ hen, and arranged one by means of a centrally between the first fixed contact (2) and the second fixed contact (3) rotation Stützers 5 has) rotatable moving contact (4) having therein integ ¬ alumi- clear contact system.
2. Dreistellungslasttrennschalter (1) nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , d a s s das Löschkontaktsystem durch eine Vakuumschaltröhre (7) ge¬ bildet ist, wobei ein Bewegkontakt-Anschlussbolzen (9) der Vakuumschaltröhre (7) ein Führungselement (11) aufweist, durch welches mittels einer Kurvenbahn (12) des Schaltgerätes (1) eine Antriebsbewegung zum Öffnen bzw. Schließen des 2. three-position circuit breaker (1) according to claim 1, characterized in that the extinguishing contact system by a vacuum interrupter (7) ge ¬ forms, wherein a moving contact terminal pin (9) of the vacuum interrupter (7) has a guide element (11) through which by means of a Cam track (12) of the switching device (1) a drive movement to open or close the
Löschkontaktsystems einleitbar ist. Erase contact system is introduced.
3. Dreistellungslasttrennschalter (1) nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , d a s s die Kurvenbahn (12) zur Einleitung der Antriebsbewegung in den Bewegkontakt-Anschlussbolzen (9) zum Schließen des Löschkontaktsystems während der Drehbewegung eines Einschaltvorganges des Schaltgerätes (1) derart ausgebildet ist, dass ein Einschaltlichtbogen nur im Hauptkontaktsystem zündbar ist. 3. three-position circuit breaker (1) according to claim 1 or 2, characterized in that the cam track (12) for initiating the drive movement in the moving contact terminal pin (9) for closing the extinguishing contact system during the rotational movement of a switch-on of the switching device (1) is designed such that a switch-on arc is ignitable only in the main contact system.
4. Dreistellungslasttrennschalter (1) nach einem der vorangehenden Ansprüche, 4. three-position circuit breaker (1) according to one of the preceding claims,
d a d u r c h g e k e n n z e i c h n e t , d a s s das Erdungskontaktsystem durch einen Erdungskontakt (6), einen Erdungsgegenkontakt (19), welche sich diametral gegen¬ überstehen, sowie den drehbaren Bewegkontakt (4) gebildet ist . characterized in that the earthing contact system is formed by a grounding contact (6), a grounding counter contact (19), which protrude diametrically against ¬ , and 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 true EP2766914A1 (en) 2014-08-20
EP2766914B1 EP2766914B1 (en) 2017-01-18

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

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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
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
EP4089704A1 (en) * 2021-05-13 2022-11-16 ABB Schweiz AG A medium voltage switching apparatus
EP4089705A1 (en) * 2021-05-13 2022-11-16 ABB Schweiz AG A medium voltage switching apparatus

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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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IN2014KN01104A (en) 2015-10-09
CN103959417B (en) 2017-06-16
DE102011087630B4 (en) 2016-11-03
WO2013079381A1 (en) 2013-06-06
EP2766914B1 (en) 2017-01-18
CN103959417A (en) 2014-07-30
DE102011087630A1 (en) 2013-06-06

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