EP0002684A1 - Fluid-blast circuit breaker - Google Patents

Fluid-blast circuit breaker Download PDF

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Publication number
EP0002684A1
EP0002684A1 EP78101558A EP78101558A EP0002684A1 EP 0002684 A1 EP0002684 A1 EP 0002684A1 EP 78101558 A EP78101558 A EP 78101558A EP 78101558 A EP78101558 A EP 78101558A EP 0002684 A1 EP0002684 A1 EP 0002684A1
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EP
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Prior art keywords
switching
gas
pieces
cylinder
fixed
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Granted
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EP78101558A
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German (de)
French (fr)
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EP0002684B1 (en
Inventor
Karl Zückler
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Siemens AG
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Siemens AG
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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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
    • H01H33/7053—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle having a bridging element around two hollow tubular contacts

Definitions

  • the invention relates to a gas pressure switch with two fixed nozzle-shaped switching elements, which are bridged in the switched-on position by a hollow cylindrical movable switching element, and with a blowing device consisting of a piston and a movable cylinder, the cylinder being coupled to the moving switching element and in the course of the switch-off process runs from one of the fixed contact pieces and is provided with an annular insulating body which reduces the flow cross-section between the fixed contact pieces in the course of the switch-off process.
  • Such a pressure gas switch is known from DE-AS 24 38 017, in which the annular insulating body is designed as an insulating tube perforated on the jacket side, which directly surrounds the arc combustion chamber during the extinguishing phase and is coupled to the moving part of the blowing device, the blowing cylinder is.
  • the tube is connected on the one hand to the blow cylinder base enclosing a fixed contact and on the other hand to the free end of the bridging contact.
  • an arc column is formed between the arc electrodes, which has a thickness that is current-proportional in a first approximation.
  • the hollow nozzle-shaped contact pieces intended for the entry of the arc must be dimensioned in their inner diameter. The diameter of the nozzle-shaped contact pieces is thus largely defined for reliable arc quenching.
  • the isolating gap between the opened contact pieces after the arc quenching must have such a high dielectric strength that re-ignition of the arc is impossible.
  • This requires such a large distance between the fixed nozzle-shaped switching elements or such a large length of the separating section that, at higher voltages, the radial gas flow speed in the separating section becomes significantly lower than in the nozzles of the fixed switching elements. This can lead to an undesired radially outward migration of the arc.
  • an insulating material body that reduces the inflow cross section between the fixed contact pieces is advantageous in the case of blown piston switches for higher voltages and high currents.
  • the invention has for its object to provide a gas pressure switch of the type mentioned, in which the ring-shaped insulating material leads to no impairment of the dielectric strength of the isolating section and contributes to an improvement in the switching behavior with capacitive currents.
  • the insulating body has an axial extent which is less than the length of the separation distance between the fixed contact pieces and is arranged approximately in the middle between the cylinder bottom and the free end of the movable contact piece.
  • the gas throughput in the inflow region of the separating section is controlled such that the radial flow rate of the extinguishing gas in the separating section and the axial flow rate in the nozzle-shaped switching elements are approximately the same, taking into account the change in density.
  • the gas throughput is thus optimized in an advantageous manner.
  • the ring-shaped body can at least partially consist of a material that is additional under arcing Extinguishing gas releases.
  • the axial extent of the annular body can be approximately half of the separation distance.
  • the ring-shaped body is carried by a wall which is designed as an intermediate floor and extends transversely to the axis of the cylinder.
  • the through openings of the sieve-like wall must overall be at least as large as the outflow cross section through the nozzles.
  • the compressed gas switch shown schematically in FIG. 1 contains only the parts necessary for understanding the invention, e.g. B. without the drive and the supporting insulators supporting the switching chamber.
  • a switching chamber 1 which consists of insulating material, there is sulfur hexafluoride as a gaseous extinguishing and insulating agent under a pressure of, for example, 6 bar.
  • the switching chamber 1 encloses two fixed nozzle-shaped switching pieces 2, 3, which are bridged by a hollow cylindrical moving switching piece 5 in the switch-on position shown to the right of the center line 4. In the switch-off position shown to the left of the center line 4, the separating distance a between the switching pieces 2 and 3 is free.
  • the gas pressure switch has a blowing device consisting of a fixed piston 6 and a movable cylinder 7, which compresses extinguishing gas in the course of the switch-off movement and discharges it into the interior of the switch elements 2, .
  • a blowing device consisting of a fixed piston 6 and a movable cylinder 7, which compresses extinguishing gas in the course of the switch-off movement and discharges it into the interior of the switch elements 2, .
  • the separation distance and thus the cross section effective for the gas throughput is increased until a annular body 8 reduces the flow cross-section between the fixed switching pieces 2 and 3.
  • the annular body 8 has an axial extent that is less than the length a of the separation distance between the switching pieces 2 and 3. It is arranged approximately in the middle between the cylinder bottom 9 and the free end 10 of the movable contact piece 5.
  • the annular body preferably has an axial extent which is approximately half of the separation distance a. It is carried by a hand 11 designed as an intermediate floor, which extends transversely to the axis 4 of the cylinder 7.
  • the wall 11 has a sieve-like design and is suitable for the passage of piston parts 12 in order to limit an increase in the space which is harmful to the compression.
  • the curve shown in FIG. 2 for the effective free gap width in the region of the separation distance results.

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  • Circuit Breakers (AREA)

Abstract

Die Erfindung bezieht sich auf einen Druckgasschalter, der als Hochspannungs-Leistungsschalter in Energieversorgungsnetzen einsetzbar ist. Der Druckgasschalter weist zwei feststehende düsenförmige Schaltstücke (2, 3) auf, die in der Einschaltstellung durch ein hohlzylindrisches bewegliches Schalstück (5) überbrückbar sind. Der Schalter enthält ferner eine aus einem Kolben (6) und einem beweglichen Zylinder (7) bestehende Blaseinrichtung, die im Verlaufe der Ausschaltbewegung Löschgas komprimiert und durch den von den Schaltstücken (2, 3) im Bereich der Trennstrecke gebildeten Ringspalt in das Innere der Schaltstücke (2, 3) treibt. Um eine möglichst große dielektrische Festigkeit der Trennstrecke zu erzielen und insbesondere eine Verbesserung des Schaltverhaltens bei kapazitiven Strömen zu erzielen, ist erfindungsgemäß vorgesehen, daß ein den Anströmquerschnitt zwischen den feststehenden Schaltstücken (2, 3) vermindernder ringförmiger Isolierstoffkörper (8) eine axiale Erstreckung aufweist, die geringer als die Länge (a) der Trennstrecke zwischen den feststehenden Schaltstücken (2, 3) ist und etwa in der Mitte zwischen dem Zylinderboden (9) und dem freien Ende (10) des beweglichen Schaltstückes (5) angeordnet ist.The invention relates to a gas pressure switch, which can be used as a high-voltage circuit breaker in energy supply networks. The gas pressure switch has two fixed nozzle-shaped switching pieces (2, 3) which can be bridged in the switched-on position by a hollow cylindrical moving switching piece (5). The switch also contains a blowing device consisting of a piston (6) and a movable cylinder (7), which compresses extinguishing gas in the course of the switching-off movement and into the interior of the switching pieces through the annular gap formed by the switching pieces (2, 3) in the region of the separating distance (2, 3) drives. In order to achieve the greatest possible dielectric strength of the isolating section and, in particular, to achieve an improvement in the switching behavior in the case of capacitive currents, the invention provides that an annular insulating material body (8) which reduces the flow cross section between the fixed switching pieces (2, 3) has an axial extension, which is less than the length (a) of the separation distance between the fixed contact pieces (2, 3) and is arranged approximately in the middle between the cylinder base (9) and the free end (10) of the movable contact piece (5).

Description

Die Erfindung bezieht sich auf einen Druckgasschalter mit zwei feststehenden düsenförmigen Schaltstücken, die in der Einschaltstellung durch ein hohlzylindrisches bewegliches Schaltstück überbrückt sind, und mit einer aus einem Kolben und einem beweglichen Zylinder bestehenden Blaseinrichtung, wobei der Zylinder mit dem beweglichen Schaltstück gekoppelt ist und im Verlauf des Ausschaltvorganges vom einen der feststehenden Schaltstücke abläuft und mit einem den Anströmquerschnitt zwischen den feststehenden Schaltstücken im Verlauf des Ausschaltvorganges vermindernden ringförmigen Isolierstoffkörper versehen ist.The invention relates to a gas pressure switch with two fixed nozzle-shaped switching elements, which are bridged in the switched-on position by a hollow cylindrical movable switching element, and with a blowing device consisting of a piston and a movable cylinder, the cylinder being coupled to the moving switching element and in the course of the switch-off process runs from one of the fixed contact pieces and is provided with an annular insulating body which reduces the flow cross-section between the fixed contact pieces in the course of the switch-off process.

Aus der DE-AS 24 38 017 ist ein derartiger Druckgasschalter bekannt, bei dem der ringförmige Isolierstoffkörper als mantelseitig gelochtes Isolierstoffrohr ausgebildet ist, das während der Löschphase den Lichtbogenbrennraum unmittelbar umschließt und mit dem beweglichen Teil der Blaseinrichtung, dem Blaszylinder, gekoppelt ist. Das Rohr ist einerseits mit dem das eine feststehende Schaltstück umschließenden Blaszylinderboden und andererseits mit dem freien Ende des Überbrückungsschaltstückes verbunden. Da die Löschung des zwischen den beiden feststehenden Schaltstücken gezogenen Lichtbogens erfolgt sein muß, bevor der Blaszylinderboden und damit der ringförmige Körper die Trennstrecke zwischen den beiden feststehenden Schaltstücken verlassen hat, wird die geöffnete Trennstrecke durch Isolierstoffteile überbrückt, die die dielektrische Festigkeit des gelöschten Kontaktsystems beeinträchtigen können.Such a pressure gas switch is known from DE-AS 24 38 017, in which the annular insulating body is designed as an insulating tube perforated on the jacket side, which directly surrounds the arc combustion chamber during the extinguishing phase and is coupled to the moving part of the blowing device, the blowing cylinder is. The tube is connected on the one hand to the blow cylinder base enclosing a fixed contact and on the other hand to the free end of the bridging contact. Since the arc drawn between the two fixed contact pieces must be extinguished before the blow cylinder base and thus the annular body has left the isolating distance between the two fixed contact pieces, the opened isolating distance is bridged by insulating material parts, which can impair the dielectric strength of the deleted contact system .

Verzichtet man dagegen auf einen den Anströmquerschnitt zwischen den feststehenden Schaltstücken im Verlaufe des Ausschaltvorganges vermindernden ringförmigen Isolierstoffkörper, so wird der Gasdurchsatz durch die gastechnisch als Ringspalt ausgebildete Trennstrecke unverhältnismäßig groß. Dies führt zur Notwendigkeit von entsprechend groß dimensionierten Blaseinrichtungen und Abströmquerschnitten.If, on the other hand, one dispenses with an annular insulating body which reduces the flow cross-section between the fixed switching elements in the course of the switching-off process, the gas throughput due to the gas gap formed as an annular gap becomes disproportionately large. This leads to the need for correspondingly large-sized blowing devices and outflow cross sections.

Es ergibt sich nämlich bei Blaskolbenschaltern, die nur ein geringes Kompressionsvolumen für das Löschgas aufweisen, noch ein weiteres Problem. Bei vorgegebenem Strom bildet sich zwischen den Lichtbogenelektroden eine Lichtbogensäule aus, die eine in erster Näherung stromproportionale Dicke aufweist. Hierfür müssen die zum Einlauf des Lichtbogens bestimmten hohlen düsenförmigen Schaltstücke in ihrem inneren Durchmesser dimensioniert sein. Für eine sichere Lichtbogenlöschung ist damit der Durchmesser der düsenförmigen Schaltstücke weitgehend festgelegt.A further problem arises in the case of blow piston switches which have only a small compression volume for the extinguishing gas. For a given current, an arc column is formed between the arc electrodes, which has a thickness that is current-proportional in a first approximation. For this purpose, the hollow nozzle-shaped contact pieces intended for the entry of the arc must be dimensioned in their inner diameter. The diameter of the nozzle-shaped contact pieces is thus largely defined for reliable arc quenching.

Unabhängig davon muß die Trennstrecke aber auch zwischen den geöffneten Schaltstücken nach der Lichtbogenlöschung eine so große dielektrische Festigkeit aufweisen, daß eine Wiederzündung des Lichtbogens ausgeschlossen ist. Dies bedingt einen so großen Abstand zwischen den feststehenden düsenförmigen Schaltstücken bzw. eine so große Länge der Trennstrecke, daß bei höheren Spannungen die radiale Gasströmungsgeschwindigkeit in der Trennstrecke wesentlich geringer wird als in den Düsen der feststehenden Schaltstücke. Dies kann zu einem unerwünschten radial nach außen gerichteten Auswandern des Lichtbogens führen. Auch aus diesem Grund ist bei Blaskolbenschaltern für höhere Spannungen und großen Strömen ein den Anströ-=querschnitt zwischen den feststehenden Schaltstücken vermindernder Isolierstoffkörper vorteilhaft.Irrespective of this, the isolating gap between the opened contact pieces after the arc quenching must have such a high dielectric strength that re-ignition of the arc is impossible. This requires such a large distance between the fixed nozzle-shaped switching elements or such a large length of the separating section that, at higher voltages, the radial gas flow speed in the separating section becomes significantly lower than in the nozzles of the fixed switching elements. This can lead to an undesired radially outward migration of the arc. For this reason too, an insulating material body that reduces the inflow cross section between the fixed contact pieces is advantageous in the case of blown piston switches for higher voltages and high currents.

Der Erfindung liegt die Aufgabe zugrunde, einen Druckgasschalter der eingangs genannten Art anzugeben, bei dem der ringförmige Isolierstoffkörper zu keiner Beeinträchtigung der dielektrischen Festigkeit der Trennstrecke führt und zu einer Verbesserung des Schaltverhaltens bei kapazitiven Strömen beiträgt.The invention has for its object to provide a gas pressure switch of the type mentioned, in which the ring-shaped insulating material leads to no impairment of the dielectric strength of the isolating section and contributes to an improvement in the switching behavior with capacitive currents.

Nach der Erfindung wird dies dadurch gelöst, daß der Isolierstoffkörper eine axiale Erstreckung aufweist, die geringer als die Länge der Trennstrecke zwischen den feststehenden Schaltstücken ist und etwa in der Mitte zwischen dem Zylinderboden und dem freien Ende des beweglichen Schaltstückes angeordnet ist.According to the invention this is achieved in that the insulating body has an axial extent which is less than the length of the separation distance between the fixed contact pieces and is arranged approximately in the middle between the cylinder bottom and the free end of the movable contact piece.

Durch Anwendung der Erfindung wird der Gasdurchsatz im Anströmgebiet der Trennstrecke so gesteuert, daß die radiale Strömungsgeschwindigkeit des Löschgases in der Trennstrecke und die axiale Strömungsgeschwindigkeit in den düsenförmigen Schaltstücken unter Berücksichtigung der Dichteänderung annähernd gleich sind. Der Gasdurchsatz ist damit in vorteilhafter Weise optimiert.By using the invention, the gas throughput in the inflow region of the separating section is controlled such that the radial flow rate of the extinguishing gas in the separating section and the axial flow rate in the nozzle-shaped switching elements are approximately the same, taking into account the change in density. The gas throughput is thus optimized in an advantageous manner.

Der ringförmige Körper kann in Ausgestaltung des Erfindungsgedankens zumindest teilweise aus einem Material bestehen, das unter Lichtbogenbeanspruchung zusätzliches Löschgas abgibt. Dabei kann die axiale Erstreckung des ringförmigen Körpers etwa die Hälfte der Trennstrecke betragen. Der ringförmige Körper ist bei einem bevorzugten Ausführungsbeispiel der Erfindung von einer als Zwischenboden ausgebildeten sie.bartigen Wand getragen, die sich quer zur Achse des Zylinders erstreckt. Die Durchtrittsöffnungen der siebartigen Wand müssen dabei insgesamt mindestens so groß wie der Abströmquerschnitt durch die Düsen sein.In the embodiment of the inventive concept, the ring-shaped body can at least partially consist of a material that is additional under arcing Extinguishing gas releases. The axial extent of the annular body can be approximately half of the separation distance. In a preferred exemplary embodiment of the invention, the ring-shaped body is carried by a wall which is designed as an intermediate floor and extends transversely to the axis of the cylinder. The through openings of the sieve-like wall must overall be at least as large as the outflow cross section through the nozzles.

Anhand der Zeichnung ist ein Ausführungsbeispiel des erfindungsgemäßen Druckgasschalters beschrieben und die Wirkungsweise erläutert.An exemplary embodiment of the pressure gas switch according to the invention is described with reference to the drawing and the mode of operation is explained.

Der in Fig. 1 schematisch in einem Schnitt dargestellte Druckgasschalter enthält nur die zum Verständnis der Erfindung erforderlichen Teile, z. B. ohne den Antrieb und die die Schaltkammer tragenden Stützisolatoren. Im Innern einer Schaltkammer 1, die aus Isolierstoff besteht, befindet sich als gasförmiges Lösch- und Isoliermittel Schwefelhexafluorid unter einem Druck von beispielsweise 6 bar. Die Schaltkammer 1 umschließt zwei feststehende düsenförmige Schaltstücke 2, 3, die in der rechts der Mittellinie 4 dargestellten Einschaltstellung von einem hohlzylindrischen beweglichen Schaltstück 5 überbrückt sind. In der links der Mittellinie 4 dargestellten Ausschaltstellung ist die Trennstrecke a zwischen den Schaltstücken 2 und 3 frei. Der Druckgasschalter weist eine aus einem feststehenden Kolben 6 und einem beweglichen Zylinder 7 bestehende Blaseinrichtung auf, die im Verlauf der Ausschaltbewegung Löschgas komprimiert und durch den von den Schaltstücken 2 und 3 im Bereich der Trennstrecke gebildeten Ringspalt in das Innere der Schaltstücke 2,.3 abführt. Vom Augenblick der Trennung des beweglichen Schaltstückes 5 vom feststehenden Schaltstück 2 an wird die Trennstrecke und damit der für den Gasdurchsatz wirksame Querschnitt erhöht, bis ein ringförmiger Körper 8 den Anströmquerschnitt zwischen den feststehenden Schaltstücken 2 und 3 vermindert. Hierzu hat der ringförmige Körper 8 eine axiale Erstrekkung, die geringer als die Länge a der Trennstrecke zwischen den Schaltstücken 2 und 3 ist. Er ist etwa in der Mitte zwischen dem Zylinderboden 9 und dem freien Ende 10 des beweglichen Schaltstückes 5 angeordnet. Der ringförmige Körper hat vorzugsweise eine axiale Erstreckung, die etwa die Hälfte der Trennstrecke a beträgt. Er wird von einer als Zwischenboden ausgebildeten Hand 11 getragen, die sich quer zur Achse 4 des Zylinders 7 erstreckt. Die Wand 11 ist siebartig ausgebildet und für den Durchtritt von Kolbenteilen 12 geeignet, um eine Erhöhung des der Kompression schädlichen Raumes zu begrenzen. In Abhängigkeit vom Weg, den das bewegliche Schaltstück 5 während der Ausschaltbewegung zurücklegt, ergibt sich, über der Zeit aufgetragen, die in Fig. 2 dargestellte Kurve für die wirksame freie Spaltbreite im Bereich der Trennstrecke.The compressed gas switch shown schematically in FIG. 1 contains only the parts necessary for understanding the invention, e.g. B. without the drive and the supporting insulators supporting the switching chamber. Inside a switching chamber 1, which consists of insulating material, there is sulfur hexafluoride as a gaseous extinguishing and insulating agent under a pressure of, for example, 6 bar. The switching chamber 1 encloses two fixed nozzle-shaped switching pieces 2, 3, which are bridged by a hollow cylindrical moving switching piece 5 in the switch-on position shown to the right of the center line 4. In the switch-off position shown to the left of the center line 4, the separating distance a between the switching pieces 2 and 3 is free. The gas pressure switch has a blowing device consisting of a fixed piston 6 and a movable cylinder 7, which compresses extinguishing gas in the course of the switch-off movement and discharges it into the interior of the switch elements 2, . From the moment the movable switching element 5 is separated from the fixed switching element 2, the separation distance and thus the cross section effective for the gas throughput is increased until a annular body 8 reduces the flow cross-section between the fixed switching pieces 2 and 3. For this purpose, the annular body 8 has an axial extent that is less than the length a of the separation distance between the switching pieces 2 and 3. It is arranged approximately in the middle between the cylinder bottom 9 and the free end 10 of the movable contact piece 5. The annular body preferably has an axial extent which is approximately half of the separation distance a. It is carried by a hand 11 designed as an intermediate floor, which extends transversely to the axis 4 of the cylinder 7. The wall 11 has a sieve-like design and is suitable for the passage of piston parts 12 in order to limit an increase in the space which is harmful to the compression. Depending on the distance that the moving contact 5 travels during the switch-off movement, plotted over time, the curve shown in FIG. 2 for the effective free gap width in the region of the separation distance results.

Es ist damit möglich, bei gleichem Strom und dementsprechend gleich dicker Lichtbogensäule beim Ausschaltvorgang die Länge der Trennstrecke zu erhöhen, d. h. eine Unterbrechereinheit für eine höhere Nennspannung auszulegen, ohne daß die Gefahr besteht, daß durch eine geringere radiale Strömungsgeschwindigkeit die Beblasung des Lichtbogens vermindert und hierdurch eine Auswanderbewegung des Lichtbogens zu befürchten ist.It is thus possible to increase the length of the isolating path with the same current and, accordingly, the same thickness of arc column during the switch-off process. H. to design an interrupter unit for a higher nominal voltage, without the risk that the blowing of the arc is reduced by a lower radial flow velocity and, as a result, there is a risk of the arc moving out.

Claims (4)

1. Druckgasschalter mit zwei feststehenden düsenförmigen Schaltstücken, die in der Einschaltstellung durch ein hohlzylindrisches bewegliches Schaltstück überbrückt sind, und mit einer aus einem Kolben und einem beweglichen Zylinder bestehenden Blaseinrichtung, wobei der Zylinder mit dem beweglichen Schaltstück gekoppelt ist und im Verlauf des Ausschaltvorganges vom einen der feststehenden Schaltstücke abläuft und mit einem den Anströmquerschnitt zwischen den feststehenden Schaltstücken im Verlauf des Ausschaltvorganges vermindernden ringförmigen Isolierstoffkörper versehen ist, dadurch gekennzeichnet , daß der Isolierstoffkörper (8) eine axiale Erstreckung aufweist, die geringer als die Länge (a) der Trennstrecke zwischen den feststehenden Schaltstücken (2, 3) ist und etwa in der Mitte zwischen dem Zylinderboden (9) und dem freien Ende (10) des beweglichen Schaltstückes (5) angeordnet ist.1.Gas switch with two fixed nozzle-shaped switching elements, which are bridged in the switched-on position by a hollow cylindrical movable switching element, and with a blowing device consisting of a piston and a movable cylinder, the cylinder being coupled to the movable switching element and in the course of the switching-off process by one of the fixed contact pieces expires and is provided with an annular insulating material body which reduces the flow cross-section between the fixed contact pieces in the course of the switching-off process, characterized in that the insulating material body (8) has an axial extent which is less than the length (a) of the separation distance between the fixed items Switch pieces (2, 3) and is arranged approximately in the middle between the cylinder base (9) and the free end (10) of the movable contact piece (5). 2. Druckgasschalter nach Anspruch 1, dadurch gekennzeichnet , daß der ringförmige Isolierstoffkörper (8) zumindest teilweise aus einem unter Lichtbogenbeanspruchung zusätzliches Löschgas abgebenden Material besteht.2. Gas-blast switch according to claim 1, characterized in that the annular insulating material body (8) consists at least partially of an additional quenching gas emitting material under arc stress. 3. Druckgasschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet , daß die axiale Erstreckung des ringförmigen Isolierstoffkörpers (8) etwa die Hälfte der Trennstrecke (a) beträgt.3. Gas-blast switch according to claim 1 or 2, characterized in that the axial extent of the annular insulating body (8) is approximately half the separation distance (a). 4. Druckgasschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet , daß der ringförmige Isolierstoffkörper (8) von einer als Zwischenboden ausgebildeten siebartigen Wand (11) getragen ist, die sich quer zur Achse (4) des Zylinders (7) erstreckt.4. Gas-blast switch according to one of claims 1 to 3, characterized in that the annular insulating body (8) is carried by a sieve-like wall (11) designed as an intermediate floor, which extends transversely to the axis (4) of the cylinder (7) stretches.
EP78101558A 1977-12-30 1978-12-04 Fluid-blast circuit breaker Expired EP0002684B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2759268A DE2759268C3 (en) 1977-12-30 1977-12-30 Gas switch
DE2759268 1977-12-30

Publications (2)

Publication Number Publication Date
EP0002684A1 true EP0002684A1 (en) 1979-07-11
EP0002684B1 EP0002684B1 (en) 1982-04-28

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EP78101558A Expired EP0002684B1 (en) 1977-12-30 1978-12-04 Fluid-blast circuit breaker

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US (1) US4223192A (en)
EP (1) EP0002684B1 (en)
JP (1) JPS5494673A (en)
DE (1) DE2759268C3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042456A1 (en) * 1980-06-23 1981-12-30 BBC Aktiengesellschaft Brown, Boveri & Cie. High voltage power circuit breaker
EP0069694A2 (en) * 1981-07-02 1983-01-12 Siemens Aktiengesellschaft Contact system for gas blast circuit breaker
WO2016146474A1 (en) 2015-03-17 2016-09-22 Covestro Deutschland Ag Silane groups containing polyisocyanates based on 1,5-diisocyanatopentane

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8125499U1 (en) * 1981-08-28 1986-07-31 Siemens AG, 1000 Berlin und 8000 München Gas switch
DE8133427U1 (en) * 1981-11-12 1985-07-18 Siemens AG, 1000 Berlin und 8000 München Gas switch
DE3323865C2 (en) * 1983-06-29 1991-01-03 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka High-voltage switching chamber
DE3915700C3 (en) * 1989-05-13 1997-06-19 Aeg Energietechnik Gmbh Compressed gas switch with evaporative cooling

Citations (1)

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DE2438017A1 (en) 1974-08-05 1976-02-26 Siemens Ag PRESSURE GAS SWITCH

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Publication number Priority date Publication date Assignee Title
CH413960A (en) * 1964-12-23 1966-05-31 Bbc Brown Boveri & Cie Contact arrangement for pressure gas switch
DE2209287C3 (en) * 1972-02-22 1974-12-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Electric pressure gas switch
CH558079A (en) * 1973-05-10 1975-01-15 Bbc Brown Boveri & Cie PRESSURE GAS SWITCH.

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE2438017A1 (en) 1974-08-05 1976-02-26 Siemens Ag PRESSURE GAS SWITCH

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0042456A1 (en) * 1980-06-23 1981-12-30 BBC Aktiengesellschaft Brown, Boveri & Cie. High voltage power circuit breaker
EP0069694A2 (en) * 1981-07-02 1983-01-12 Siemens Aktiengesellschaft Contact system for gas blast circuit breaker
EP0069694A3 (en) * 1981-07-02 1984-09-26 Siemens Aktiengesellschaft Contact system for gas blast circuit breaker
WO2016146474A1 (en) 2015-03-17 2016-09-22 Covestro Deutschland Ag Silane groups containing polyisocyanates based on 1,5-diisocyanatopentane

Also Published As

Publication number Publication date
EP0002684B1 (en) 1982-04-28
JPS6352729B2 (en) 1988-10-20
DE2759268B2 (en) 1979-10-31
US4223192A (en) 1980-09-16
DE2759268C3 (en) 1984-08-02
DE2759268A1 (en) 1979-07-05
JPS5494673A (en) 1979-07-26

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