EP0073175B1 - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

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Publication number
EP0073175B1
EP0073175B1 EP82730107A EP82730107A EP0073175B1 EP 0073175 B1 EP0073175 B1 EP 0073175B1 EP 82730107 A EP82730107 A EP 82730107A EP 82730107 A EP82730107 A EP 82730107A EP 0073175 B1 EP0073175 B1 EP 0073175B1
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EP
European Patent Office
Prior art keywords
cylinder
pressure
piston
suction
tube
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Expired
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EP82730107A
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German (de)
French (fr)
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EP0073175A1 (en
Inventor
Karl Dr. rer. nat. Zückler
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Siemens AG
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Siemens AG
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Priority to AT82730107T priority Critical patent/ATE12056T1/en
Publication of EP0073175A1 publication Critical patent/EP0073175A1/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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H2033/907—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism using tandem pistons, e.g. several compression volumes being modified in conjunction or sequential

Definitions

  • the invention relates to an electric pressure gas switch with two quenching nozzles opposite each other at a distance from the separating distance, one of which is attached to a fixed contact tube and the other to a fixed guide tube, with a longitudinally movable switching tube for bridging the separating distance and with a pressure piston pressure cylinder Arrangement for generating an extinguishing agent flow acting on the arc, the switching tube and the movable part of the pressure piston-pressure cylinder arrangement being coupled to a common drive and rigidly connected to one another.
  • Such switches are known from DE-A-2 248 116 and DE-A-2 719135.
  • the pressure gas switch according to DE-A-1 966 973 also essentially has the features mentioned.
  • the pressure cylinder of the pressure piston-pressure cylinder arrangement is arranged to be longitudinally movable and is rigidly coupled to the switching tube and the drive. During the switch-off movement, the pressure cylinder is therefore moved together with the switching tube in the direction of the pressure piston of the pressure piston-pressure cylinder arrangement. In the course of the switch-off movement, the drive also sets the pressure piston in motion, its movement being opposite to that of the pressure cylinder. This results in a compression or an improvement in the pre-compression particularly quickly during the switch-off process.
  • the invention has for its object to further improve this known electrical pressure gas switch with regard to the flow of extinguishing agent, this improvement should be achievable with a simple construction and with a low manufacturing cost.
  • the pressure piston forming the movable part of the pressure piston-pressure cylinder arrangement is located in a fixed pressure cylinder in an electrical pressure gas switch of the type specified at the beginning; the pressure cylinder is connected in the region of its end comprising the contact tube to the interior thereof through through openings in the contact tube, and the pressure piston is rigidly connected to a suction piston in a fixed suction cylinder comprising the guide tube, the suction cylinder in the region of its end facing the pressure cylinder via holes in the Guide tube is connected to the interior.
  • the main advantage of the pressure gas switch according to the invention is that, despite a short pre-compression path, a high pressure difference is generated at the extinguishing nozzles. This is due to the fact that an overpressure arises in the area outside the extinguishing nozzles during the pre-compression and at the same time a negative pressure is built up inside the extinguishing nozzles, which is caused by the movement of the pressure piston and the suction piston during the pre-compression phase.
  • the relatively large pressure difference obtained in this way leads to a strong flow of extinguishing agent, which leads to an advantageously short extinguishing time for the arc.
  • Another advantage is that the relatively large pressure difference builds up relatively quickly, so that the pressure gas switch according to the invention can be extinguished relatively early.
  • flow obstacles are arranged in the contact tube and in the guide tube, each of which lies on the side of the through openings and holes facing away from the extinguishing nozzles.
  • Such flow obstacles are particularly advantageous when the flow cross sections in the interior of the contact tube and the guide tube are relatively large. These flow obstacles desirably complicate the suction flow from the low pressure space towards the isolating section of the switch.
  • the pressure cylinder of the pressure piston-pressure cylinder arrangement and also the suction cylinder can each consist of a separate component.
  • the pressure cylinder and the suction cylinder consist of a single cylinder part with an annular partition.
  • the ring-shaped partition divides the only cylinder part into the pressure cylinder and the suction cylinder.
  • the interior of the pressure cylinder is connected to the interior of the suction cylinder via an external pressure line.
  • This pressure line ensures that the pressure inside the pressure cylinder corresponds to that inside the suction cylinder.
  • connection of the interior of the pressure cylinder and the suction cylinder via the pressure line is particularly advantageous if the suction cylinder has a counter-piston at its end facing away from the pressure cylinder, which counter-clockwise movement of the drive to the suction piston during the switching-off movement of the drive.
  • the suction cylinder has a counter-piston at its end facing away from the pressure cylinder, which counter-clockwise movement of the drive to the suction piston during the switching-off movement of the drive.
  • an exemplary embodiment of the electric pressure gas switch according to the invention is shown schematically in section in the figure, the right side of the figure representing the exemplary embodiment in the switched-on state and the left side of the figure representing the exemplary embodiment in the switched-off state.
  • the electrical pressure gas switch shown contains a fixed contact tube 1 with an extinguishing nozzle 2, which is opposite an extinguishing nozzle 3 of a likewise fixed guide tube 4.
  • the separating section T formed by the extinguishing nozzles 2 and 3 can be bridged by a switching tube 5, which is part of a drive cylinder 6.
  • This drive cylinder 6 is connected to a drive in a manner not shown.
  • a suction piston 7 is fastened to the drive cylinder 6 and can be moved in a suction cylinder 8.
  • a pressure piston 10, which is guided in a pressure cylinder 11, is connected to the suction piston 7 via connecting rods, of which only one connecting rod 9 is shown in the figure.
  • the pressure piston 10, the suction piston 7, the switching tube 5 and the drive cylinder 6 are thus rigidly mechanically coupled to one another.
  • the pressure cylinder 11 and the suction cylinder 8 consist of a one-piece cylinder part which consists of insulating material and is equipped at its end comprising the contact tube 1 with ribs 12 for extending the creepage distance.
  • the one-piece insulating part is divided by an annular partition 13 into the suction cylinder 8 and the pressure cylinder 11.
  • the pressure piston 10 is provided on the inside with a bevel 14 so that through openings 16 of the contact tube 1 remain free even when the switch is switched on.
  • the switching tube 5 is also provided with openings 18.
  • the entire electrical switch is housed in a porcelain insulator 21 in a known manner.
  • the suction cylinder 8 cannot be fixed by one the bottom, but be closed off by a counter-piston 23 on its side facing away from the pressure cylinder 11.
  • This counter-piston 23 can be connected to the drive of the switch in a manner as described in detail in DE-A-1 966 973.
  • the counter-piston 23 is consequently moved in the direction of arrow 24 during the switching-off movement and therefore causes an additional compression of the insulating gas together with the suction piston 7 in the interior of the suction cylinder 8. If there is a pressure line 25 between the interior of the suction cylinder 8 and the pressure cylinder 11, then this pressure is transmitted into the interior of the pressure cylinder 11 and causes a further pressure increase in the cylinder 11. This has an advantageous effect on the flow of extinguishing agent and on the dielectric strength of the switching path Disconnect the switching tube 5 from the extinguishing nozzle 2 of the contact tube 1.

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  • Circuit Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

An electric switch includes two quenching nozzles which are arranged opposite each other at the distance of the switching gap; a contact tube; a guide tube and a longitudinally movable switching tube for bridging the switching gap which is coupled, together with a movable pressure piston of a pressure piston/pressure cylinder arrangement provided for generating a quenching medium flow acting on the arc, to a common drive. In order to improve such a switch still further with respect to the quenching medium flow, the pressure piston is connected rigidly to the switching tube and is arranged in a stationary pressure cylinder which is connected in the region of its end surrounding the contact tube via passage openings in the contact tube to the interior of the latter. The pressure piston is connected rigidly to a suction piston in a suction cylinder which is connected in the region of its end facing the pressure cylinder, via holes in the guide tube, to the interior thereof.

Description

Die Erfindung bezieht sich auf einen elektrischen Druckgasschalter mit zwei im Abstand der Trennstrecke einander gegenüberliegenden Löschdüsen, von denen die eine an einem feststehenden Kontaktrohr und die andere an einem feststehenden Führungsrohr angebracht ist, mit einem längsbewegbaren Schaltrohr zur Überbrückung der Trennstrecke und mit einer Druckkolben-Druckzylinder-Anordnung zur Erzeugung einer auf den Lichtbogen einwirkenden Löschmittelströmung, wobei das Schaltrohr und der bewegliche Teil der Druckkolben-Druckzylinder-Anordnung mit einem gemeinsamen Antrieb gekoppelt und untereinander starr verbunden sind.The invention relates to an electric pressure gas switch with two quenching nozzles opposite each other at a distance from the separating distance, one of which is attached to a fixed contact tube and the other to a fixed guide tube, with a longitudinally movable switching tube for bridging the separating distance and with a pressure piston pressure cylinder Arrangement for generating an extinguishing agent flow acting on the arc, the switching tube and the movable part of the pressure piston-pressure cylinder arrangement being coupled to a common drive and rigidly connected to one another.

Derartige Schalter sind aus der DE-A-2 248 116 und der DE-A-2 719135 bekannt.Such switches are known from DE-A-2 248 116 and DE-A-2 719135.

Auch der Druckgasschalter nach der DE-A-1 966 973 weist im wesentlichen die genannten Merkmale auf.The pressure gas switch according to DE-A-1 966 973 also essentially has the features mentioned.

Der Druckzylinder der Druckkolben-Druckzylinder-Anordnung ist längsbewegbar angeordnet und starr mit dem Schaltrohr und dem Antrieb gekoppelt. Bei der Ausschaltbewegung wird daher der Druckzylinder gemeinsam mit dem Schaltrohr in Richtung auf den Druckkolben der Druckkolben-Druckzylinder-Anordnung bewegt. Im Verlauf der Ausschaltbewegung wird von dem Antrieb auch der Druckkolben in Bewegung versetzt, wobei seine Bewegung gegenläufig zu der des Druckzylinders ist. Dadurch ergibt sich während des Ausschaltvorganges besonders schnell eine Verdichtung bzw. eine Verbesserung der Vorkompression.The pressure cylinder of the pressure piston-pressure cylinder arrangement is arranged to be longitudinally movable and is rigidly coupled to the switching tube and the drive. During the switch-off movement, the pressure cylinder is therefore moved together with the switching tube in the direction of the pressure piston of the pressure piston-pressure cylinder arrangement. In the course of the switch-off movement, the drive also sets the pressure piston in motion, its movement being opposite to that of the pressure cylinder. This results in a compression or an improvement in the pre-compression particularly quickly during the switch-off process.

Der Erfindung liegt die Aufgabe zugrunde, diesen bekannten elektrischen Druckgasschalter hinsichtlich der Löschmittelströmung noch weiter zu verbessern, wobei diese Verbesserung mit einem einfachen konstruktiven Aufbau und mit einem niedrigen Herstellungsaufwand erzielbar sein soll.The invention has for its object to further improve this known electrical pressure gas switch with regard to the flow of extinguishing agent, this improvement should be achievable with a simple construction and with a low manufacturing cost.

Zur Lösung dieser Aufgabe befindet sich bei einem elektrischen Druckgasschalter der eingangs angegebenen Art erfindungsgemäß der den beweglichen Teil der Druckkolben-Druckzylinder-Anordnung bildende Druckkolben in einem feststehenden Druckzylinder; der Druckzylinder ist im Bereich seines das Kontaktrohr umfassenden Endes über Durchgangsöffnungen im Kontaktrohr mit dessen Innenraum verbunden, und der Druckkolben ist starr mit einem Saugkolben in einem das Führungsrohr umfassenden, feststehenden Saugzylinder verbunden, wobei der Saugzylinder im Bereich seines dem Druckzylinder zugewandten Endes über Löcher im Führungsrohr mit dessen Innenraum verbunden ist.To achieve this object, the pressure piston forming the movable part of the pressure piston-pressure cylinder arrangement is located in a fixed pressure cylinder in an electrical pressure gas switch of the type specified at the beginning; the pressure cylinder is connected in the region of its end comprising the contact tube to the interior thereof through through openings in the contact tube, and the pressure piston is rigidly connected to a suction piston in a fixed suction cylinder comprising the guide tube, the suction cylinder in the region of its end facing the pressure cylinder via holes in the Guide tube is connected to the interior.

Der wesentliche Vorteil des erfindungsgemäßen Druckgasschalters besteht darin, daß trotz eines kurzen Vorkompressionsweges eine hohe Druckdifferenz an den Löschdüsen erzeugt wird. Dies ist darauf zurückzuführen, daß im Bereich außerhalb der Löschdüsen bei der Vorkompression ein Überdruck entsteht und gleichzeitig innerhalb der Löschdüsen ein Unterdruck aufgebaut wird, der durch die Bewegung des Druckkolbens und des Saugkolbens während der Vorkompressionsphase entsteht. Die so gewonnene, verhältnismäßig große Druckdifferenz führt zu einer starken Löschmittelströmung, die zu einer vorteilhaft kurzen Löschzeit des Lichtbogens führt. Ein weiterer Vorteil besteht darin, daß die verhältnismäßig große Druckdifferenz relativ schnell aufgebaut wird, so daß der erfindungsgemäße Druckgasschalter verhältnismäßig früh löschfähig wird.The main advantage of the pressure gas switch according to the invention is that, despite a short pre-compression path, a high pressure difference is generated at the extinguishing nozzles. This is due to the fact that an overpressure arises in the area outside the extinguishing nozzles during the pre-compression and at the same time a negative pressure is built up inside the extinguishing nozzles, which is caused by the movement of the pressure piston and the suction piston during the pre-compression phase. The relatively large pressure difference obtained in this way leads to a strong flow of extinguishing agent, which leads to an advantageously short extinguishing time for the arc. Another advantage is that the relatively large pressure difference builds up relatively quickly, so that the pressure gas switch according to the invention can be extinguished relatively early.

Es ist zwar bereits bekannt (»IEEE-Transactions on Power Apparatus and Systems«, Vol. PAS-99, No. 3, Mai/Juni 1980, S. en 833-840, insb. Fig. 3 und zugeh. Text), bei einem elektrischen Druckgasschalter zur Verkürzung der Vorkompressionszeit und zur Erhöhung der Druckdifferenz für die Löschmittelströmung einer Druckkolben-Druckzylinder-Anordnung zusätzlich einen Saugzylinder mit einem bewegbaren Saugkolben zuzuordnen, jedoch wirkt bei diesem bekannten elektrischen Schalter mit einem bewegbaren, hohlen Schaltstück mit einer Löschdüse ein feststehender, stabförmiger Kontakt zusammen; während der Ausschaltbewegung wird bei dem bekannten elektrischen Schalter zusätzlich zu einem auf die Trennstrekke von außen her einwirkenden Überdruck im Innern des bewegbaren Schaltstückes ein Unterdruck mittels Saugkolben und Saugzylinder aufgebaut. Es tritt bei dem bekannten Schalter somit ein Unterdruck nur im Innern des bewegbaren Schaltstückes auf, so daß nur von einer Seite her bezüglich der Trennstrecke ein Unterdruck erzeugt wird. Bei dem erfindungsgemäßen Druckgasschalter hingegen wird im Bereich beider Löschdüsen ein Unterdruck erzeugt.It is already known ("IEEE-Transactions on Power Apparatus and Systems", vol. PAS-99, No. 3, May / June 1980, pp. En 833-840, esp. Fig. 3 and associated text), in an electrical pressure gas switch to shorten the pre-compression time and to increase the pressure difference for the extinguishing agent flow of a pressure piston-pressure cylinder arrangement, additionally assign a suction cylinder with a movable suction piston, but in this known electrical switch with a movable, hollow contact piece with an extinguishing nozzle, a fixed, rod-shaped contact together; during the switch-off movement, in the known electrical switch, in addition to an overpressure acting on the separating section from the outside, an underpressure is built up by means of a suction piston and suction cylinder. In the known switch, a negative pressure thus only occurs inside the movable contact piece, so that a negative pressure is only generated from one side with respect to the separating distance. With the pressure gas switch according to the invention, however, a negative pressure is generated in the area of both extinguishing nozzles.

Es hat sich bei dem erfindungsgemäßen Druckgasschalter als vorteilhaft erwiesen, wenn im Kontaktrohr und im Führungsrohr Strömungshindernisse angeordnet sind, die jeweils auf der von den Löschdüsen abgewandten Seite der Durchgangsöffnungen und Löcher liegen. Derartige Strömungshindernisse sind vor allem dann vorteilhaft, wenn die Strömungsquerschnitte im Innern des Kontaktrohres und des Führungsrohres verhältnismäßig groß sind. Diese Strömungshindernisse erschweren in erwünschter Weise die Saugströmung aus dem Niederdruckraum in Richtung auf die Trennstrecke des Schalters.It has proven to be advantageous in the pressure gas switch according to the invention if flow obstacles are arranged in the contact tube and in the guide tube, each of which lies on the side of the through openings and holes facing away from the extinguishing nozzles. Such flow obstacles are particularly advantageous when the flow cross sections in the interior of the contact tube and the guide tube are relatively large. These flow obstacles desirably complicate the suction flow from the low pressure space towards the isolating section of the switch.

Bei dem erfindungsgemäßen Druckgasschalter kann der Druckzylinder der Druckkolben-Druckzylinder-Anordnung und auch der Saugzylinder jeweils für sich aus einem separaten Bauelement bestehen. Aus fertigungstechnischen Gründen vor allem erscheint es jedoch vorteilhaft, wenn der Druckzylinder und der Saugzylinder aus einem einzigen Zylinderteil mit einer ringförmigen Trennwand bestehen. Durch die ringförmige Trennwand wird das einzige Zylinderteil in den Druckzylinder und in den Saugzylinder unterteilt.In the pressure gas switch according to the invention, the pressure cylinder of the pressure piston-pressure cylinder arrangement and also the suction cylinder can each consist of a separate component. For technical production reasons, however, it appears to be particularly advantageous if the pressure cylinder and the suction cylinder consist of a single cylinder part with an annular partition. The ring-shaped partition divides the only cylinder part into the pressure cylinder and the suction cylinder.

Als vorteilhaft wird es ferner angesehen, wenn der Innenraum des Druckzylinders mit dem Innenraum des Saugzylinders über eine äußere Druckleitung verbunden ist. Über diese Druckleitung ist dafür gesorgt, daß der Druck im Innern des Druckzylinders dem im Innern des Saugzylinders entspricht.It is also considered advantageous if the interior of the pressure cylinder is connected to the interior of the suction cylinder via an external pressure line. This pressure line ensures that the pressure inside the pressure cylinder corresponds to that inside the suction cylinder.

Die Verbindung der Innenräume des Druckzylinders und des Saugzylinders über die Druckleitung ist dann besonders vorteilhaft, wenn der Saugzylinder an seinem vom Druckzylinder abgewandten Ende einen Gegenkolben aufweist, der im Verlauf der Ausschaltbewegung des Antriebs eine von diesem gesteuerte gegenläufige Bewegung zum Saugkolben ausführt. In diesem Fall ergibt sich - wie in der DE-A-1 966 973 im einzelnen dargelegt ist - eine besonders hohe Vorkompression, die über die Druckleitung dem Innenraum des Druckzylinders mitgeteilt wird, wodurch die Druckdifferenz im Bereich der Trennstrecke und damit die Lösungsmittelströmung noch weiter verbessert wird.The connection of the interior of the pressure cylinder and the suction cylinder via the pressure line is particularly advantageous if the suction cylinder has a counter-piston at its end facing away from the pressure cylinder, which counter-clockwise movement of the drive to the suction piston during the switching-off movement of the drive. In this case, as is detailed in DE-A-1 966 973, there is a particularly high pre-compression, which is communicated to the interior of the pressure cylinder via the pressure line, as a result of which the pressure difference in the region of the separating section and thus the solvent flow are further increased is improved.

Es ist aber auch möglich, bei dem erfindungsgemäßen Druckgasschalter den Saugzylinder an seinem vom Druckzylinder abgewandten Ende durch einen feststehenden Boden abzuschließen. Diese Ausführung ist insofern vorteilhaft, als sie mit einem vergleichsweise einfachem Antrieb auskommt.However, it is also possible in the pressure gas switch according to the invention to close off the suction cylinder at its end facing away from the pressure cylinder by means of a fixed base. This version is advantageous in that it manages with a comparatively simple drive.

Zur Erläuterung der Erfindung ist in der Figur ein Ausführungsbeispiel des erfindungsgemäßen elektrischen Druckgasschalters schematisch im Schnitt dargestellt, wobei die rechte Seite der Figur das Ausführungsbeispiel im eingeschalteten Zustand und die linke Seite der Figur das Ausführungsbeispiel im ausgeschalteten Zustand wiedergibt.To illustrate the invention, an exemplary embodiment of the electric pressure gas switch according to the invention is shown schematically in section in the figure, the right side of the figure representing the exemplary embodiment in the switched-on state and the left side of the figure representing the exemplary embodiment in the switched-off state.

Der dargestellte elektrische Druckgasschalter enthält ein feststehendes Kontaktrohr 1 mit einer Löschdüse 2, der eine Löschdüse 3 eines ebenfalls feststehenden Führungsrohres 4 gegenübersteht. Die von den Löschdüsen 2 und 3 gebildete Trennstrecke T ist von einem Schaltrohr 5 überbrückbar, das Bestandteil eines Antriebszylinders 6 ist. Dieser Antriebszylinder 6 ist in nicht dargestellter Weise mit einem Antrieb verbunden.The electrical pressure gas switch shown contains a fixed contact tube 1 with an extinguishing nozzle 2, which is opposite an extinguishing nozzle 3 of a likewise fixed guide tube 4. The separating section T formed by the extinguishing nozzles 2 and 3 can be bridged by a switching tube 5, which is part of a drive cylinder 6. This drive cylinder 6 is connected to a drive in a manner not shown.

An dem Antriebszylinder 6 ist ein Saugkolben 7 befestigt, der in einem Saugzylinder 8 bewegbar ist. Mit dem Saugkolben 7 ist über Verbindungsstangen, von denen in der Figur nur eine Verbindungsstange 9 gezeigt ist, ein Druckkolben 10 verbunden , der in einem Druckzylinder 11 geführt ist. Der Druckkolben 10, der Saugkolben 7, das Schaltrohr 5 und der Antriebszylinder 6 sind also starr mechanisch miteinander gekoppelt. Der Druckzylinder 11 und der Saugzylinder 8 bestehen aus einem einstückigen Zylinderteil, das aus Isolierstoff besteht und an seinem das Kontaktrohr 1 umfassenden Ende mit Rippen 12 zur Verlängerung des Kriechweges ausgestattet ist. Das einstückige Isolierteil wird durch eine ringförmige Trennwand 13 in den Saugzylinder 8 und den Druckzylinder 11 unterteilt.A suction piston 7 is fastened to the drive cylinder 6 and can be moved in a suction cylinder 8. A pressure piston 10, which is guided in a pressure cylinder 11, is connected to the suction piston 7 via connecting rods, of which only one connecting rod 9 is shown in the figure. The pressure piston 10, the suction piston 7, the switching tube 5 and the drive cylinder 6 are thus rigidly mechanically coupled to one another. The pressure cylinder 11 and the suction cylinder 8 consist of a one-piece cylinder part which consists of insulating material and is equipped at its end comprising the contact tube 1 with ribs 12 for extending the creepage distance. The one-piece insulating part is divided by an annular partition 13 into the suction cylinder 8 and the pressure cylinder 11.

Der Druckkolben 10 ist nach innen zu mit einer Schräge 14 versehen, damit Durchgangsöffnungen 16 des Kontaktrohres 1 auch im eingeschalteten Zustand des Schalters freibleiben. Auch im Führungsrohr 4 befinden sich Löcher 17, die den Innenraum des Führungsrohres 4 mit dem Innenraum des Saugzylinders 8 verbinden. Auch das Schaltrohr 5 ist mit Durchbrechungen 18 versehen.The pressure piston 10 is provided on the inside with a bevel 14 so that through openings 16 of the contact tube 1 remain free even when the switch is switched on. There are also holes 17 in the guide tube 4, which connect the interior of the guide tube 4 with the interior of the suction cylinder 8. The switching tube 5 is also provided with openings 18.

Im Kontaktrohr 1 befindet sich ein Strömungshindernis 19 auf der Seite der Durchgangsöffnungen 16, die von der Löschdüse 2 abgewandt ist. Ein weiteres Strömungshindernis 20 befindet sich im Führungsrohr 4 ebenfalls im Bereich außerhalb der Löcher 17.In the contact tube 1 there is an obstacle to flow 19 on the side of the through openings 16 which faces away from the extinguishing nozzle 2. Another flow obstacle 20 is located in the guide tube 4, also in the area outside the holes 17.

Der gesamte elektrische Schalter ist in einem Porzellanisolator 21 in bekannter Weise untergebracht.The entire electrical switch is housed in a porcelain insulator 21 in a known manner.

Der beschriebene Druckgasschalter arbeitet in folgender Weise:

  • Infolge Betätigung durch den nicht dargestellten Antrieb wird der Antriebszylinder 6 in Richtung des Pfeiles 22 bewegt; damit bewegt sich auch der an ihm befestigte Saugkolben 7 und über die Verbindungsstange 9 auch der Druckkolben 10 in Richtung des Pfeiles 22 unter Mitnahme des ebenfalls starr mit dem Antriebszylinder 6 gekoppelten Schaltrohres 5. Bei der Bewegung des Druckkolbens 10 wird nicht nur das zur Isolation innerhalb des Porzellanisolators 21 befindliche Isoliergas im Innern des Druckzylinders 11 komprimiert, sondern gleichzeitig durch die Durchgangsöffnungen 16 von dem Druckkolben 10 Isoliergas aus dem Innern des Kontaktrohres 1 abgesaugt, wobei das Strömungshindernis 19 dafür sorgt, daß aus dem Niederdruckraum des Schalters nicht zuviel Isoliergas nachströmt. Gleichzeitig gelangt auch das Schaltrohr 5 mit seinen Durchbrechungen 18 in dem Bereich der Löcher 17 des Führungsrohres 4, so daß von dem Saugkolben 7 auch aus dem Innenraum des Führungsrohres 4 Isoliergas abgesaugt und damit auch auf dieser Seite der Trennstrecke T ein Unterdruck erzeugt wird. Es wird also von beiden Seiten der Trennstrecke T aus zur Erzeugung eines Unterdruckes beigetragen.
The pressure gas switch described works in the following way:
  • As a result of actuation by the drive, not shown, the drive cylinder 6 is moved in the direction of arrow 22; this also moves the suction piston 7 attached to it and, via the connecting rod 9, also the pressure piston 10 in the direction of arrow 22, taking along the switching tube 5, which is also rigidly coupled to the drive cylinder 6. When the pressure piston 10 moves, not only is this used for insulation within the porcelain insulator 21 located insulating gas compressed inside the pressure cylinder 11, but at the same time sucked through the through openings 16 from the pressure piston 10 insulating gas from the inside of the contact tube 1, the flow obstacle 19 ensuring that not too much insulating gas flows in from the low-pressure space of the switch. At the same time, the switching tube 5 with its openings 18 reaches the area of the holes 17 of the guide tube 4, so that 4 insulating gas is also sucked out of the interior of the guide tube 4 by the suction piston 7 and thus a negative pressure is also generated on this side of the separating distance T. It is thus contributed to the generation of a negative pressure from both sides of the separation section T.

Die Druckerhöhung im Innenraum des Druckzylinders 11 und die Unterdruckerzeugung im Innern des Kontaktrohres 1 und des Führungsrohres 4 dauern so lange an, bis sich das Schaltrohr 5 von der Löschdüse 2 des Kontaktrohres 1 unter Ziehung eines Lichtbogens trennt. In diesem Augenblick ist zwischen dem Innenraum des Druckzylinders 11 und den Innenräumen von Kontaktrohr 1 und Führungsrohr 4 eine hohe Druckdifferenz gebildet, die sich aus der Druckerhöhung im Innenraum des Druckzylinders 11 und dem Unterdruck innerhalb von Kontaktrohr 1 und Führungsrohr 4 ergibt. Es setzt demzufolge eine starke Löschmittelströmung ein, die den Lichtbogen relativ schnell löscht. Damit ist trotz eines verhältnismäßig kurzen Löschweges eine kurze Gesamtlöschzeit erreicht, die dem Schalter eine kurze Ausschaltzeit ermöglicht.The pressure increase in the interior of the pressure cylinder 11 and the generation of negative pressure inside the contact tube 1 and the guide tube 4 continue until the switching tube 5 separates from the extinguishing nozzle 2 of the contact tube 1 by drawing an arc. At this moment, a high pressure difference is formed between the interior of the pressure cylinder 11 and the interior of the contact tube 1 and guide tube 4, which results from the pressure increase in the interior of the pressure cylinder 11 and the negative pressure within the contact tube 1 and the guide tube 4. As a result, there is a strong flow of extinguishing agent that extinguishes the arc relatively quickly. Despite a relatively short extinguishing path, a short total extinguishing time is thus achieved, which enables the switch to have a short switch-off time.

Wie in der Figur strichliert dargestellt, kann der Saugzylinder 8 nicht durch einen feststehenden Boden, sondern durch einen Gegenkolben 23 auf seiner vom Druckzylinder 11 abgewandten Seite abgeschlossen sein. Dieser Gegenkolben 23 kann in einer Weise mit dem Antrieb des Schalters verbunden sein, wie es in der DE-A-1 966 973 im einzelnen beschrieben ist. Der Gegenkolben 23 wird demzufolge bei der Ausschaltbewegung in Richtung des Pfeiles 24 bewegt und verursacht deshalb im Innenraum des Saugzylinders 8 gemeinsam mit dem Saugkolben 7 eine zusätzliche Kompression des Isoliergases. Besteht eine Druckleitung 25 zwischen dem Innenraum des Saugzylinders 8 und dem Druckzylinder 11, dann wird dieser Druck in den Innenraum des Druckzylinders 11 übertragen und verursacht eine weitere Druckerhöhung im Zylinder 11. Dies wirkt sich vorteilhaft auf die Löschmittelströmung und auf die dielektrische Festigkeit der Schaltstrecke beim Trennen des Schaltrohres 5 von der Löschdüse 2 des Kontaktrohres 1 aus.As shown in dashed lines in the figure, the suction cylinder 8 cannot be fixed by one the bottom, but be closed off by a counter-piston 23 on its side facing away from the pressure cylinder 11. This counter-piston 23 can be connected to the drive of the switch in a manner as described in detail in DE-A-1 966 973. The counter-piston 23 is consequently moved in the direction of arrow 24 during the switching-off movement and therefore causes an additional compression of the insulating gas together with the suction piston 7 in the interior of the suction cylinder 8. If there is a pressure line 25 between the interior of the suction cylinder 8 and the pressure cylinder 11, then this pressure is transmitted into the interior of the pressure cylinder 11 and causes a further pressure increase in the cylinder 11. This has an advantageous effect on the flow of extinguishing agent and on the dielectric strength of the switching path Disconnect the switching tube 5 from the extinguishing nozzle 2 of the contact tube 1.

Claims (6)

1. An electrical gas blast circuit breaker having two extinguishing nozzles (2, 3) which are arranged opposite one another in the spark gap interval, and of which one (2) is arranged on a fixed contact tube (1) and the other is arranged on a fixed guide tube (4), a longitudinally movable switching tube (5) which serves to bridge the spark gap, and a pressure piston - cylinder arrangement (10, 11) which serves to produce a stream of extinguishing agent which acts on the arc, the switching tube (5) and the moving part of the pressure piston - cylinder arrangement being coupled to a common drive and rigidly connected to one another, characterised in that the pressure piston (10), which forms the moving part of the pressure piston - cylinder arrangement, is located in a fixed pressure cylinder (11); that in the region of its end which surrounds the contact tube (1), the pressure cylinder (11) is connected by openings (16) in the contact tube (1) to the interior thereof; that the pressure cylinder (10) is rigidly connected to a suction piston (7) in a fixed suction cylinder (8) which surrounds the guide tube (4); and that in the region of its end which faces towards the pressure cylinder (11), the suction cylinder (8) is connected by holes (17) in the guide tube (4) to the interior thereof.
2. A gas blast circuit breaker as claimed in Claim 1, characterised in that, in the contact tube (1) and the guide tube (4), flow obstacles (19, 20) are provided, which are arranged respectively on that side of the openings (16) and the holes (17) which faces away from the extinguishing nozzles (2,3).
3. A gas blast circuit breaker as claimed in Claim 1 or Claim 2, characterised in that the pressure cylinder (11) and the suction cylinder (8) consist of an integral cylinder member with an annular partition wall (13).
4. A gas blast circuit breaker as claimed in one of the preceding Claims, characterised in that the interior of the pressure cylinder (11) is connected to the interior of the suction cylinder (8) by way of an external pressure line (25).
5. A gas blast circuit breaker as claimed in one of the preceding Claims, characterised in that, at its end which faces away from the pressure cylinder (11), the suction cylinder (8) is closed by a fixed base.
6. A gas blast circuit breaker as claimed in one of Claims 1 to 4, characterised in that, at its end which faces away from the pressure cylinder (11), the suction cylinder (8) has a counter piston (23) which, during the switching-off movement of the drive, executes a movement controlled by the drive, in the direction opposite to that of the suction piston (7).
EP82730107A 1981-08-27 1982-08-12 Gas blast circuit breaker Expired EP0073175B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82730107T ATE12056T1 (en) 1981-08-27 1982-08-12 ELECTRIC GAS SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3134200 1981-08-27
DE19813134200 DE3134200A1 (en) 1981-08-27 1981-08-27 ELECTRIC SWITCH

Publications (2)

Publication Number Publication Date
EP0073175A1 EP0073175A1 (en) 1983-03-02
EP0073175B1 true EP0073175B1 (en) 1985-03-06

Family

ID=6140404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82730107A Expired EP0073175B1 (en) 1981-08-27 1982-08-12 Gas blast circuit breaker

Country Status (5)

Country Link
US (1) US4450330A (en)
EP (1) EP0073175B1 (en)
JP (1) JPS5842126A (en)
AT (1) ATE12056T1 (en)
DE (3) DE3134200A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2576143B1 (en) * 1985-01-16 1987-12-24 Alsthom Atlantique HIGH-VOLTAGE, COMPRESSED GAS, CIRCUIT BREAKER ASSISTED BY THE ARC THERMAL EFFECT AND WITH DOUBLE MOTION
FR2576142B1 (en) * 1985-01-16 1987-12-24 Alsthom Atlantique HIGH VOLTAGE CIRCUIT BREAKER, COMPRESSED GAS, HANDLING ENERGY ASSISTED BY THE ARC THERMAL EFFECT
US4665289A (en) * 1985-05-08 1987-05-12 Kabushiki Kaisha Toshiba Puffer type gas insulated circuit breaker
DE3750349T2 (en) * 1986-05-09 1994-12-15 Mitsubishi Heavy Ind Ltd Arrangement for the production of thin layers.
JPH0680662B2 (en) * 1987-12-02 1994-10-12 株式会社日立製作所 IC element correction method
JPH0680672B2 (en) * 1987-12-02 1994-10-12 株式会社日立製作所 IC element processing equipment
DE4041702C1 (en) * 1990-12-24 1992-04-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
DE4117057A1 (en) * 1991-05-23 1992-11-26 Siemens Ag MULTI-POSITION ROTARY SWITCH WORKING WITH LOESCHGAS
DE9210086U1 (en) * 1992-07-22 1993-11-25 Siemens AG, 80333 München High voltage circuit breakers
EP0741399B1 (en) * 1995-05-04 1999-01-20 ANSALDO INDUSTRIA S.p.A. A gas-dielectric high-tension interrupter of the arc-puffer type
JP4989794B1 (en) 2011-08-30 2012-08-01 三菱電機株式会社 Gas circuit breaker
JP6157824B2 (en) * 2012-09-28 2017-07-05 株式会社東芝 Gas circuit breaker
JP6289856B2 (en) * 2013-10-16 2018-03-07 株式会社東芝 Gas circuit breaker
US20240072522A1 (en) * 2022-08-23 2024-02-29 Siemens Energy Global GmbH & Co. KG Compressed gas switch

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2061975A5 (en) * 1969-10-06 1971-06-25 Merlin Gerin
DE2248116A1 (en) * 1972-09-28 1974-04-04 Siemens Ag HIGH VOLTAGE CIRCUIT BREAKER WITH A GAS-FORM EXTINGUISHING AND INSULATING AGENT
DE2350832B2 (en) * 1973-10-10 1980-05-08 Calor-Emag Elektrizitaets-Aktiengesellschaft, 4030 Ratingen High voltage switch
GB1559498A (en) * 1976-05-04 1980-01-23 Ass Elect Ind Gas-blast circuit breakers
DE2911633C2 (en) * 1979-03-24 1985-07-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Auto-pneumatic pressure gas switch
US4278860A (en) * 1979-08-03 1981-07-14 Gould Inc. Arc driven single pressure type circuit breaker

Also Published As

Publication number Publication date
DE3262497D1 (en) 1985-04-11
DE8125211U1 (en) 1985-03-21
ATE12056T1 (en) 1985-03-15
DE3134200A1 (en) 1983-03-10
EP0073175A1 (en) 1983-03-02
US4450330A (en) 1984-05-22
JPS5842126A (en) 1983-03-11

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