EP0744759A1 - H.T. circuit breaker with a fixed heating chamber - Google Patents

H.T. circuit breaker with a fixed heating chamber Download PDF

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Publication number
EP0744759A1
EP0744759A1 EP96250107A EP96250107A EP0744759A1 EP 0744759 A1 EP0744759 A1 EP 0744759A1 EP 96250107 A EP96250107 A EP 96250107A EP 96250107 A EP96250107 A EP 96250107A EP 0744759 A1 EP0744759 A1 EP 0744759A1
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EP
European Patent Office
Prior art keywords
continuous current
compression
current contact
circuit breaker
compression cylinder
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Granted
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EP96250107A
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German (de)
French (fr)
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EP0744759B1 (en
Inventor
Volker Lehmann
Friedrich Löbner
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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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc
    • 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
    • H01H2033/908—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 valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume
    • 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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H01H33/245—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring using movable field electrodes

Definitions

  • the invention relates to a high-voltage circuit breaker with a pair of opposing arcing contact pieces, which delimits a separating distance when switched off, and a pair of continuous current contact pieces arranged coaxially to the arcing contact pieces, of which at least one of the contact pieces can be driven from a drive side, and with one in Compression device which can be actuated in the course of the switching movement and has a compression piston and a drivable compression cylinder and a heating volume which is arranged on the drive side of the compression piston and is stationary during the switching movement.
  • Such a high-voltage circuit breaker is already known from DE-OS 41 03 119.
  • two arcing contacts are coaxially surrounded by continuous current contacts and a fixed heating volume is provided, in which the quenching gas heated by an arcing during the switching process can be stored and made available for subsequent blowing of the arcing.
  • there is a mechanical compression device for the quenching gas which on the one hand provides sufficiently high quenching gas pressure at low currents, if the heating of the quenching gas by the arc is insufficient, and on the other hand supports the blowing of the arc at medium-sized amperages.
  • a major advantage of the known circuit breaker described before other known designs is that the heating volume and the components delimiting it do not need to be accelerated during the switching movement.
  • the compression cylinder carries the drivable continuous current contact on its outside, that the compression piston is arranged on the side of the circuit breaker facing the drive in such a way that the compression cylinder with the continuous current contact can be moved out of the isolating section and that Continuous current contacts are separated from the arcing contacts in a gas-tight manner by an insulating material body that coaxially surrounds them.
  • the switch is structurally simplified overall and the masses to be accelerated are reduced. As a result, it is necessary to withdraw the compression cylinder, which now carries electrically conductive elements, from the isolating section when it is switched off.
  • the heating volume stores the heated extinguishing gas and makes it available for subsequent blowing of the arc. Contamination of the continuous current contacts with hot extinguishing gas is prevented by the insulating material body.
  • An advantageous embodiment of the invention provides that the compression piston is pierced by a check valve that allows gas to flow only in the direction from the compression space to the heating volume.
  • the quenching gas compressed in the compression chamber can thus enter the heating chamber through the check valve, while an overflow of pressurized quenching gas from the heating chamber into the compression chamber is not possible. This prevents the extinguishing gas pressure in the compression chamber from rising so much that it hinders or slows down the opening movement.
  • a further advantageous embodiment of the invention provides that the continuous current contact carried by the compression cylinder forms a field electrode in the switched-off state to make the electrical field more uniform in the region of the isolating path.
  • the compression cylinder Since the compression cylinder carries the continuous current contact anyway, it makes sense to design it in the form of a field electrode or to conductively connect it to a field electrode. As a result, in the retracted state of the compression cylinder, i. H. When the circuit breaker is switched off, a field equalization in the area between the contacts is guaranteed.
  • the fixed counter contact to the movable continuous current contact can also be designed as a field electrode. It is also conceivable to arrange a known, retractable field electrode on the side opposite the drive side of the switch, which is acted upon by a spring force in the axial direction of the switch, can be pushed back by the compression cylinder when the switch is switched on, and the compression cylinder when it is switched off follows a stop and remains there as a field electrode.
  • the figure shows schematically part of an interrupter unit of a circuit breaker without the housing, in the upper half in the switched-off state and in the lower half in the switched-on state.
  • two arcing contacts 1, 2 coaxially face each other in the switched-off state in the upper half of the figure.
  • the drivable arcing contact 1 When switched on, i.e. H.
  • the drivable continuous current contact 3 is brought into contact with the fixed continuous current contact 4 in the switched-on state.
  • the drivable continuous current contact 3 consists of an electrically conductive, metallic coating on the outside of the compression cylinder 5, which forms the drivable part of a mechanical compression device for the extinguishing gas.
  • the drivable compression cylinder 5 is pulled over a stationary compression piston 6 and the compression volume 7 formed between them is compressed.
  • the arcing contacts 1, 2 and the continuous current contacts 3, 4 are separated from one another, an arc being drawn between the arcing contacts 1, 2.
  • the extinguishing gas present in the arc space 8 is heated and flows through the gas channel 9 within the nozzle-shaped insulating material body 10 into a heating space 11.
  • This boiler room 11 is fixed and does not move when the switch is actuated. Expanded quenching gas is provided in the boiler room by the heat of the arc, which flows back to the arc space 8 to extinguish the arc in the zero current passage through the gas channel 9.
  • a check valve 12 is provided in the compression piston 6, which is formed by part of the insulating body 10 and part of the wall delimiting the heating chamber 11, which overflows hot extinguishing gas from the heating chamber 11 into the compression chamber 7 prevented.
  • Such an overflow of hot, pressurized extinguishing gas into the compression space 7 would namely slow down the switch drive, which causes the compression cylinder 5 on the one hand and the arcing contact 1 on the other hand and the continuous current contact 3 in the figure to be moved to the left toward the drive side.
  • the mechanically compressed extinguishing gas can flow from the compression space 7 via the check valve 12 into the heating space 11 in order to support the blowing of the arc.
  • the continuous current contact 3 consists only of a conductive coating, for example in the form of a sheet on the compression cylinder 5, and no individually stable construction is necessary for the continuous current contact, the entirety of the masses to be accelerated during the switching movement is reduced.
  • the compression cylinder 5 is connected to the drivable arcing contact piece 1 via a linkage 13 and is driven by the latter.
  • the compression cylinder can also consist entirely of metal, for example aluminum.
  • the heating chamber 11 is moved so far away from the arc chamber 8 toward the drive side that the compression cylinder 5 during the switch-off movement up to the stationary compression piston 6 can be moved back and forth from the separation distance.
  • the electrically conductive coating 3 of the compression cylinder 5 is drawn over the end face of the compression cylinder 5 and forms a field electrode in the switched-off state for uniformizing the electrical field between the arcing contacts or the continuous current contacts.
  • the insulating material nozzle 10, which has the gas flow channel 9, is arranged in a fixed manner in the region of the separating path and separates the region of the arc space 8 from the outer space of the interrupter unit, which in turn is enclosed, for example, by a porcelain housing (not shown). Only hot extinguishing gas is passed through the gas flow channel 9 into the heating volume 11.

Abstract

The switch has a pair of opposing arc contacts (1,2) and a pair of coaxial continuous current contacts (3,4). They are displaced relative to one another by compression piston/cylinder device (5,6), with a heating volume for the heated arc extinction gases, on the opposite side of the compression piston (6) to the drive, during the switching movement. The compression cylinder (5) supports the driven continuous current contact (3) and is displaced out of the separation path of the arc contacts, with a coaxial insulator separating the continuous current contact from the arc contact, to prevent contamination of the continuous current contact with the hot arc extinction gases.

Description

Die Erfindung bezieht sich auf einen Hochspannungs-Leistungsschalter mit einem Paar einander gegenüberstehender, im Ausschaltzustand eine Trennstrecke begrenzender Lichtbogenkontaktstücke sowie einem Paar von koaxial zu den Lichtbogenkontaktstücken angeordneten Dauerstromkontaktstücken, von denen jeweils mindestens eines der Kontaktstücke von einer Antriebsseite her antreibbar ist, sowie mit einer im Zuge der Schaltbewegung betätigbaren, einen Kompressionskolben und einen antreibbaren Kompressionszylinder aufweisenden Kompressionsvorrichtung und einem auf der Antriebsseite des Kompressionskolbens angeordneten, während der Schaltbewegung feststehenden Heizvolumen.The invention relates to a high-voltage circuit breaker with a pair of opposing arcing contact pieces, which delimits a separating distance when switched off, and a pair of continuous current contact pieces arranged coaxially to the arcing contact pieces, of which at least one of the contact pieces can be driven from a drive side, and with one in Compression device which can be actuated in the course of the switching movement and has a compression piston and a drivable compression cylinder and a heating volume which is arranged on the drive side of the compression piston and is stationary during the switching movement.

Ein derartiger Hochspannungs-Leistungsschalter ist bereits aus der DE-OS 41 03 119 bekannt. Bei dem bekannten Schalter sind zwei Lichtbogenkontakte koaxial von Dauerstromkontakten umgeben und es ist ein feststehendes Heizvolumen vorgesehen, in dem das durch einen Lichtbogen beim Schaltvorgang erhitzte Löschgas gespeichert und für eine nachfolgende Beblasung des Lichtbogens bereitgestellt werden kann. Zusätzlich ist dort eine mechanische Kompressionsvorrichtung für das Löschgas vorgesehen, die einerseits bei geringen Stromstärken, wenn die Beheizung des Löschgases durch den Lichtbogen nicht ausreicht, genügend hohen Löschgasdruck bereitstellt und andererseits bei mittelgroßen Stromstärken die Beblasung des Lichtbogens unterstützt.Such a high-voltage circuit breaker is already known from DE-OS 41 03 119. In the known switch, two arcing contacts are coaxially surrounded by continuous current contacts and a fixed heating volume is provided, in which the quenching gas heated by an arcing during the switching process can be stored and made available for subsequent blowing of the arcing. In addition, there is a mechanical compression device for the quenching gas, which on the one hand provides sufficiently high quenching gas pressure at low currents, if the heating of the quenching gas by the arc is insufficient, and on the other hand supports the blowing of the arc at medium-sized amperages.

Ein wesentlicher Vorteil des beschriebenen bekannten Leistungsschalters vor anderen bekannten Bauformen ist der, daß das Heizvolumen und die dieses begrenzenden Bauteile während der Schaltbewegung nicht beschleunigt zu werden brauchen.A major advantage of the known circuit breaker described before other known designs is that the heating volume and the components delimiting it do not need to be accelerated during the switching movement.

Hierdurch wird Antriebsenergie und entsprechend der Aufwand für den Schalterantrieb verringert.This reduces drive energy and, accordingly, the effort for the switch drive.

Dieser Vorteil soll bei der der Erfindung zugrundeliegenden Konstruktion beibehalten werden, wobei die zu beschleunigenden Bauteile noch weiter reduziert werden sollen.This advantage is to be retained in the construction on which the invention is based, the components to be accelerated being reduced still further.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß der Kompressionszylinder den antreibbaren Dauerstromkontakt an seiner Außenseite trägt, daß der Kompressionskolben derart auf der dem Antrieb zugewandten Seite des Leistungsschalters angeordnet ist, daß der Kompressionszylinder mit dem Dauerstromkontakt aus der Trennstrecke herausbewegt werden kann und daß die Dauerstromkontakte von den Lichtbogenkontakten durch einen diese koaxial umgebenden Isolierstoffkörper gasdicht abgetrennt sind.This object is achieved according to the invention in that the compression cylinder carries the drivable continuous current contact on its outside, that the compression piston is arranged on the side of the circuit breaker facing the drive in such a way that the compression cylinder with the continuous current contact can be moved out of the isolating section and that Continuous current contacts are separated from the arcing contacts in a gas-tight manner by an insulating material body that coaxially surrounds them.

Dadurch, daß der Kompressionszylinder mit dem Dauerstromkontakt konstruktiv verbunden ist, wird der Schalter insgesamt baulich vereinfacht und die zu beschleunigenden Massen werden verringert. Hierdurch bedingt ist es notwendig, den Kompressionszylinder, der nun elektrisch leitende Elemente trägt, im Ausschaltzustand aus der Trennstrecke zurückzuziehen.Because the compression cylinder is structurally connected to the continuous current contact, the switch is structurally simplified overall and the masses to be accelerated are reduced. As a result, it is necessary to withdraw the compression cylinder, which now carries electrically conductive elements, from the isolating section when it is switched off.

Dies wird durch eine Verlegung des Heizraumes zur Antriebsseite des Schalters hin ermöglicht. Das Heizvolumen speichert das erhitzte Löschgas und stellt es für eine nachfolgende Beblasung des Lichtbogens bereit. Durch den Isolierstoffkörper wird eine Kontaminierung der Dauerstromkontakte mit heißem Löschgas verhindert.This is made possible by moving the boiler room to the drive side of the switch. The heating volume stores the heated extinguishing gas and makes it available for subsequent blowing of the arc. Contamination of the continuous current contacts with hot extinguishing gas is prevented by the insulating material body.

Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Kompressionskolben von einem Rückschlagventil durchbrochen ist, das nur in der Richtung vom Kompressionsraum zum Heizvolumen Gas durchströmen läßt.An advantageous embodiment of the invention provides that the compression piston is pierced by a check valve that allows gas to flow only in the direction from the compression space to the heating volume.

Das in dem Kompressionsraum komprimierte Löschgas kann somit durch das Rückschlagventil in den Heizraum gelangen, während ein Überströmen von unter Druck stehendem Löschgas aus dem Heizraum in den Kompressionsraum nicht möglich ist. Hierdurch wird verhindert, daß der Löschgasdruck im Kompressionsraum so stark ansteigt, daß er die Ausschaltbewegung behindert bzw. verlangsamt.The quenching gas compressed in the compression chamber can thus enter the heating chamber through the check valve, while an overflow of pressurized quenching gas from the heating chamber into the compression chamber is not possible. This prevents the extinguishing gas pressure in the compression chamber from rising so much that it hinders or slows down the opening movement.

Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der von dem Kompressionszylinder getragene Dauerstromkontakt im Ausschaltzustand eine Feldelektrode zur Vergleichmäßigung des elektrischen Feldes im Bereich der Trennstrecke bildet.A further advantageous embodiment of the invention provides that the continuous current contact carried by the compression cylinder forms a field electrode in the switched-off state to make the electrical field more uniform in the region of the isolating path.

Da der Kompressionszylinder ohnehin den Dauerstromkontakt trägt, bietet es sich an, diesen in Form einer Feldelektrode auszubilden oder mit einer Feldelektrode leitend zu verbinden. Hierdurch ist im zurückgezogenen Zustand des Kompressionszylinders, d. h. im Ausschaltzustand des Leistungsschalters eine Feld-Vergleichmäßigung im Bereich zwischen den Kontakten gewährleistet.Since the compression cylinder carries the continuous current contact anyway, it makes sense to design it in the form of a field electrode or to conductively connect it to a field electrode. As a result, in the retracted state of the compression cylinder, i. H. When the circuit breaker is switched off, a field equalization in the area between the contacts is guaranteed.

Der feststehende Gegenkontakt zu dem beweglichen Dauerstromkontakt kann ebenfalls als Feldelektrode ausgebildet sein. Es ist auch denkbar, auf der der Antriebsseite des Schalters gegenüberliegenden Seite eine an sich bekannte, zurückschiebbare Feldelektrode anzuordnen, die in axialer Richtung des Schalters mit einer Federkraft beaufschlagt ist, beim Einschalten des Schalters durch den Kompressionszylinder zurückschiebbar ist und beim Ausschalten dem Kompressionszylinder bis zu einem Anschlag folgt und dort als Feldelektrode stehen bleibt.The fixed counter contact to the movable continuous current contact can also be designed as a field electrode. It is also conceivable to arrange a known, retractable field electrode on the side opposite the drive side of the switch, which is acted upon by a spring force in the axial direction of the switch, can be pushed back by the compression cylinder when the switch is switched on, and the compression cylinder when it is switched off follows a stop and remains there as a field electrode.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels in einer Zeichnung gezeigt und anschließend beschrieben.In the following, the invention is shown on the basis of an exemplary embodiment in a drawing and then described.

Dabei zeigt die Figur schematisch einen Teil einer Unterbrechereinheit eines Leistungsschalters ohne das Gehäuse, und zwar in der oberen Hälfte im Ausschaltzustand und in der unteren Hälfte im Einschaltzustand.The figure shows schematically part of an interrupter unit of a circuit breaker without the housing, in the upper half in the switched-off state and in the lower half in the switched-on state.

Bei dem dargestellten Hochspannungs-Leistungsschalter stehen einander zwei Lichtbogenkontakte 1, 2 im Ausschaltzustand in der oberen Hälfte der Figur koaxial gegenüber. Im Einschaltzustand, d. h. im unteren Teil der Figur ist der antreibbare Lichtbogenkontakt 1 in den feststehenden Gegenkontakt 2 eingefahren. Gleichzeitig ist im Einschaltzustand auch der antreibbare Dauerstromkontakt 3 in Kontakt mit dem feststehenden Dauerstromkontakt 4 gebracht. Der antreibbare Dauerstromkontakt 3 besteht aus einem elektrisch leitenden, metallischen Belag auf der Außenseite des Kompressionszylinders 5, der den antreibbaren Teil einer mechanischen Kompressionsvorrichtung für das Löschgas bildet.In the illustrated high-voltage circuit breaker, two arcing contacts 1, 2 coaxially face each other in the switched-off state in the upper half of the figure. When switched on, i.e. H. In the lower part of the figure, the drivable arcing contact 1 is moved into the fixed counter contact 2. At the same time, the drivable continuous current contact 3 is brought into contact with the fixed continuous current contact 4 in the switched-on state. The drivable continuous current contact 3 consists of an electrically conductive, metallic coating on the outside of the compression cylinder 5, which forms the drivable part of a mechanical compression device for the extinguishing gas.

Im Zuge der Ausschaltbewegung wird der antreibbare Kompressionszylinder 5 über einen feststehenden Kompressionskolben 6 gezogen und so wird das zwischen diesen gebildete Kompressionsvolumen 7 komprimiert.In the course of the switch-off movement, the drivable compression cylinder 5 is pulled over a stationary compression piston 6 and the compression volume 7 formed between them is compressed.

Außerdem werden die Lichtbogenkontakte 1, 2 und die Dauerstromkontakte 3, 4 voneinander getrennt, wobei zwischen den Lichtbogenkontakten 1, 2 ein Lichtbogen gezogen wird.In addition, the arcing contacts 1, 2 and the continuous current contacts 3, 4 are separated from one another, an arc being drawn between the arcing contacts 1, 2.

Durch den Einfluß dieses Lichtbogens wird das in dem Lichtbogenraum 8 vorhandene Löschgas erhitzt und strömt durch den Gaskanal 9 innerhalb des düsenförmigen Isolierstoffkörpers 10 in einen Heizraum 11.Due to the influence of this arc, the extinguishing gas present in the arc space 8 is heated and flows through the gas channel 9 within the nozzle-shaped insulating material body 10 into a heating space 11.

Dieser Heizraum 11 ist feststehend angeordnet und bewegt sich bei der Schalterbetätigung nicht. Im Heizraum wird durch die Wärme des Lichtbogens expandiertes Löschgas bereitgestellt, das zur Löschung des Lichbogens im Stromnulldurchgang durch den Gaskanal 9 zum Lichtbogenraum 8 zurückströmt.This boiler room 11 is fixed and does not move when the switch is actuated. Expanded quenching gas is provided in the boiler room by the heat of the arc, which flows back to the arc space 8 to extinguish the arc in the zero current passage through the gas channel 9.

Zwischen dem Heizraum 11 und dem Kompressionsraum 7 ist in dem Kompressionskolben 6, der durch einen Teil des Isolierstoffkörpers 10 und einen Teil der den Heizraum 11 begrenzenden Wand gebildet ist, ein Rückschlagventil 12 vorgesehen, das ein Überströmen heißen Löschgases aus dem Heizraum 11 in den Kompressionsraum 7 verhindert. Durch ein solches Überströmen heißen, unter Druck stehenden Löschgases in den Kompressionsraum 7 würde nämlich der Schalterantrieb, der bewirkt, daß einerseits der Kompressionszylinder 5 und andererseits der Lichtbogenkontakt 1 sowie der Dauerstromkontakt 3 in der Figur nach links zur Antriebsseite hin bewegt werden, abgebremst.Between the heating chamber 11 and the compression chamber 7, a check valve 12 is provided in the compression piston 6, which is formed by part of the insulating body 10 and part of the wall delimiting the heating chamber 11, which overflows hot extinguishing gas from the heating chamber 11 into the compression chamber 7 prevented. Such an overflow of hot, pressurized extinguishing gas into the compression space 7 would namely slow down the switch drive, which causes the compression cylinder 5 on the one hand and the arcing contact 1 on the other hand and the continuous current contact 3 in the figure to be moved to the left toward the drive side.

Andererseits kann aber, wenn bei niedrigen zu schaltenden Stromstärken der Lichtbogen das Löschgas nur ungenügend erhitzt, mechanisch komprimiertes Löschgas aus dem Kompressionsraum 7 über das Rückschlagventil 12 in den Heizraum 11 strömen, um die Beblasung des Lichtbogens zu unterstützen.On the other hand, however, if the arc is insufficiently heated at low currents to be switched, the mechanically compressed extinguishing gas can flow from the compression space 7 via the check valve 12 into the heating space 11 in order to support the blowing of the arc.

Da der Dauerstromkontakt 3 lediglich aus einem leitenden Belag, beispielsweise in Form eines Bleches auf dem Kompressionszylinder 5 besteht, und für den Dauerstromkontakt keine einzeln für sich tragfähige Konstruktion notwendig ist, wird die Gesamtheit der bei der Schaltbewegung zu beschleunigenden Massen reduziert. Der Kompressionszylinder 5 ist über ein Gestänge 13 mit dem antreibbaren Lichtbogenkontaktstück 1 verbunden und wird mit diesem angetrieben. Der Kompressionszylinder kann auch vollständig aus Metall, beispielsweise Aluminium bestehen.Since the continuous current contact 3 consists only of a conductive coating, for example in the form of a sheet on the compression cylinder 5, and no individually stable construction is necessary for the continuous current contact, the entirety of the masses to be accelerated during the switching movement is reduced. The compression cylinder 5 is connected to the drivable arcing contact piece 1 via a linkage 13 and is driven by the latter. The compression cylinder can also consist entirely of metal, for example aluminum.

Der Heizraum 11 ist so weit vom Lichtbogenraum 8 weg zur Antriebsseite hin verschoben, daß der Kompressionszylinder 5 bei der Ausschaltbewegung bis zu dem feststehenden Kompressionskolben 6 hin und aus der Trennstrecke wegbewegt werden kann. Der elektrisch leitende Belag 3 des Kompressionszylinders 5 ist bis über die Stirnfläche des Kompressionszylinders 5 gezogen und bildet im Ausschaltzustand eine Feldelektrode zur Vergleichmäßigung des elektrischen Feldes zwischen den Lichtbogenkontakten bzw. den Dauerstromkontakten.The heating chamber 11 is moved so far away from the arc chamber 8 toward the drive side that the compression cylinder 5 during the switch-off movement up to the stationary compression piston 6 can be moved back and forth from the separation distance. The electrically conductive coating 3 of the compression cylinder 5 is drawn over the end face of the compression cylinder 5 and forms a field electrode in the switched-off state for uniformizing the electrical field between the arcing contacts or the continuous current contacts.

Die Isolierstoffdüse 10, die den Gasströmungskanal 9 aufweist, ist im Bereich der Trennstrecke feststehend angeordnet und trennt den Bereich des Lichtbogenraumes 8 vom Außenraum der Unterbrechereinheit, die ihrerseits beispielsweise von einem nicht dargestellten Porzellangehäuse eingeschlossen wird. Es wird lediglich heißes Löschgas über den Gasströmungskanal 9 in das Heizvolumen 11 geleitet.The insulating material nozzle 10, which has the gas flow channel 9, is arranged in a fixed manner in the region of the separating path and separates the region of the arc space 8 from the outer space of the interrupter unit, which in turn is enclosed, for example, by a porcelain housing (not shown). Only hot extinguishing gas is passed through the gas flow channel 9 into the heating volume 11.

Auf diese Weise wird auch verhindert, daß heißes Löschgas, das einerseits durch Zersetzungsprodukte des Löschgases, andererseits durch verdampfte Materialien verunreinigt ist, an die Innenwand des Schaltergehäuses gelangt, wo es auf Dauer die Isolationsfestigkeit beeinträchtigen kann.In this way it is also prevented that hot extinguishing gas, which is contaminated on the one hand by decomposition products of the extinguishing gas and on the other hand by evaporated materials, reaches the inner wall of the switch housing, where it can permanently impair the insulation strength.

Claims (3)

Hochspannungs-Leistungsschalter mit einem Paar einander gegenüberstehender, im Ausschaltzustand eine Trennstrecke begrenzender Lichtbogenkontaktstücke (1, 2) sowie einem Paar von koaxial zu den Lichtbogenkontaktstücken angeordneten Dauerstromkontaktstücken (3, 4), von denen jeweils mindestens eines der Kontaktstücke von einer Antriebsseite her antreibbar ist, sowie mit einer im Zuge der Schaltbewegung betätigbaren, einen Kompressionskolben (6) und einen antreibbaren Kompressionszylinder (5) aufweisenden Kompressionsvorrichtung und einem auf der dem Antrieb zugewandten Seite des Kompressionskolbens (6) angeordneten, während der Schaltbewegung feststehenden Heizvolumen (11),
dadurch gekennzeichnet, daß
der Kompressionszylinder (5) den antreibbaren Dauerstromkontakt (3) an seiner Außenseite trägt, daß der Kompressionskolben (6) derart auf der Antriebsseite des Leistungsschalters angeordnet ist, daß der Kompressionszylinder (3) mit dem Dauerstromkontakt aus der Trennstrecke herausbewegt werden kann und daß die Dauerstromkontakte von den Lichtbogenkontakten durch einen diese koaxial umgebenden Isolierstoffkörper gasdicht abgetrennt sind.High-voltage circuit breakers with a pair of opposing arcing contact pieces (1, 2) which delimit a separating distance when switched off and a pair of continuous current contact pieces (3, 4) arranged coaxially to the arcing contact pieces, at least one of which can be driven from one drive side, and with a compression device which can be actuated in the course of the switching movement and has a compression piston (6) and a drivable compression cylinder (5) and a heating volume (11) which is arranged on the side of the compression piston (6) facing the drive and is stationary during the switching movement,
characterized in that
the compression cylinder (5) carries the drivable continuous current contact (3) on its outside, that the compression piston (6) is arranged on the drive side of the circuit breaker in such a way that the compression cylinder (3) can be moved out of the isolating section with the continuous current contact and that the continuous current contacts are separated from the arcing contacts in a gas-tight manner by an insulating material body which coaxially surrounds them. Hochspannungs-Leistungsschalter nach Anspruch 2,
dadurch gekennzeichnet, daß
der Kompressionskolben (6) von einem Rückschlagventil (12) durchbrochen ist, das nur in der Richtung vom Kompressionsraum (7) zum Heizvolumen (11) Gas durchströmen läßt.High-voltage circuit breaker according to claim 2,
characterized in that
the compression piston (6) is broken by a check valve (12) which allows gas to flow only in the direction from the compression chamber (7) to the heating volume (11). Hochspannungs-Leistungsschalter nach Anspruch 1 oder einem der folgenden,
dadurch gekennzeichnet, daß
der von dem Kompressionszylinder (5) getragene Dauerstromkontakt (3) im Ausschaltzustand eine Feldelektrode zur Vergleichmäßigung des elektrischen Feldes im Bereich der Trennstrecke bildet.High-voltage circuit breaker according to claim 1 or one of the following,
characterized in that
the continuous current contact (3) carried by the compression cylinder (5) in the switched-off state has a field electrode for equalization of the electric field in the area of the separation path.
EP96250107A 1995-05-24 1996-05-15 H.T. circuit breaker with a fixed heating chamber Expired - Lifetime EP0744759B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29509015U 1995-05-24
DE29509015U DE29509015U1 (en) 1995-05-24 1995-05-24 High-voltage circuit breakers with a fixed heating volume

Publications (2)

Publication Number Publication Date
EP0744759A1 true EP0744759A1 (en) 1996-11-27
EP0744759B1 EP0744759B1 (en) 1999-08-11

Family

ID=8008806

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96250107A Expired - Lifetime EP0744759B1 (en) 1995-05-24 1996-05-15 H.T. circuit breaker with a fixed heating chamber

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Country Link
EP (1) EP0744759B1 (en)
DE (2) DE29509015U1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2369608A1 (en) * 2010-03-26 2011-09-28 ABB Research Ltd. High-voltage circuit breaker
WO2012007447A1 (en) * 2010-07-16 2012-01-19 Alstom Grid Sas Interrupter tube switchgear for two confined contact electrodes
EP3273463A1 (en) * 2016-07-18 2018-01-24 General Electric Technology GmbH Electric switch provided with an arc-blasting unit
US10984973B2 (en) 2017-07-31 2021-04-20 General Electric Technology Gmbh Electric switch provided with an arc-blasting unit

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Publication number Priority date Publication date Assignee Title
DE29509015U1 (en) * 1995-05-24 1995-08-03 Siemens Ag High-voltage circuit breakers with a fixed heating volume
DE19613569A1 (en) * 1996-04-04 1997-10-09 Asea Brown Boveri Circuit breaker
DE19627098A1 (en) * 1996-07-05 1998-01-08 Asea Brown Boveri Circuit breaker
DE19641550A1 (en) * 1996-10-09 1998-04-16 Asea Brown Boveri Circuit breaker
DE29803232U1 (en) * 1998-02-18 1998-04-16 Siemens Ag High-voltage circuit breaker with an insulating body
DE29803380U1 (en) * 1998-02-20 1998-04-23 Siemens Ag High-voltage circuit breaker with an insulating body

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EP0475270A2 (en) * 1990-09-11 1992-03-18 Asea Brown Boveri Ab High-voltage circuit breaker of self-blasting type
EP0483840A2 (en) * 1990-11-02 1992-05-06 Asea Brown Boveri Ab High-voltage circuit breaker
WO1992014255A1 (en) * 1991-01-31 1992-08-20 Siemens Aktiengesellschaft Compressed gas switch
DE29509015U1 (en) * 1995-05-24 1995-08-03 Siemens Ag High-voltage circuit breakers with a fixed heating volume

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2369608A1 (en) * 2010-03-26 2011-09-28 ABB Research Ltd. High-voltage circuit breaker
WO2012007447A1 (en) * 2010-07-16 2012-01-19 Alstom Grid Sas Interrupter tube switchgear for two confined contact electrodes
FR2962847A1 (en) * 2010-07-16 2012-01-20 Areva T & D Sas CUTTING CHAMBER EQUIPMENT FOR TWO CONFINED CONTACT ELECTRODES
US9524836B2 (en) 2010-07-16 2016-12-20 Alstom Technology Ltd. Arc-control chamber gear for two confined contact electrodes
EP3273463A1 (en) * 2016-07-18 2018-01-24 General Electric Technology GmbH Electric switch provided with an arc-blasting unit
US10984973B2 (en) 2017-07-31 2021-04-20 General Electric Technology Gmbh Electric switch provided with an arc-blasting unit

Also Published As

Publication number Publication date
DE59602694D1 (en) 1999-09-16
EP0744759B1 (en) 1999-08-11
DE29509015U1 (en) 1995-08-03

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