EP0753873A1 - High voltage circuit breaker with an insulating body - Google Patents

High voltage circuit breaker with an insulating body Download PDF

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Publication number
EP0753873A1
EP0753873A1 EP96250153A EP96250153A EP0753873A1 EP 0753873 A1 EP0753873 A1 EP 0753873A1 EP 96250153 A EP96250153 A EP 96250153A EP 96250153 A EP96250153 A EP 96250153A EP 0753873 A1 EP0753873 A1 EP 0753873A1
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EP
European Patent Office
Prior art keywords
circuit breaker
voltage circuit
arc
insulating body
switched
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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EP96250153A
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German (de)
French (fr)
Inventor
Manfred Meinherz
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Siemens AG
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Siemens AG
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Publication of EP0753873A1 publication Critical patent/EP0753873A1/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/7015Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7023Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle
    • H01H33/703Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by an insulating tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions

Definitions

  • the invention relates to a high-voltage circuit breaker with two mutually coaxial contact pieces, at least the first of which is surrounded by an insulating body when switched on, and with a compressed gas chamber in which, in the course of a switch-off process, quenching gas under high pressure for subsequent blowing of an arc is stored, the first, in particular solid contact piece being movable during the switching process relative to the insulating body and wherein an outflow channel is provided between the insulating body and the first contact piece in the switched-off state, which connects an arcing space with an expansion space.
  • Such a high-voltage circuit breaker is known, for example, from E-0 175 954 B1 and from E-0 296 363 A2.
  • a mating contact piece temporarily closes a nozzle constriction of the insulating body during the switch-off movement and at the end of the switch movement opens an opening through which the extinguishing gas then can flow into an expansion space.
  • the extinguishing gas flowing out should cool the arc and the vicinity of the contacts as well as all areas in which high dielectric loads occur. It is therefore necessary to ensure optimal control of the extinguishing gas flow.
  • the present invention is therefore based on the object of improving the control of the extinguishing gas flow and thus the switching performance in a high-voltage circuit breaker of the type mentioned at the outset.
  • Both the first contact piece and the insulating material body can be drivable, because for the function it is only a matter of a relative movement between these components.
  • the object is achieved in that in the outflow channel is provided with a plurality of openings for the extinguishing gas, made of insulating material blow grille body.
  • the arc is guided centrally by the blow grille body in the area between the arcing contact pieces and does not form any loops.
  • the arc can be limited by the blow grille and the quenching gas can be let through.
  • a further embodiment of the invention provides that the insulating body has a constriction, which is closed in a gas-tight manner by the first contact piece in the switched-on state and that the blow grille body is arranged downstream of the constriction in the course of the extinguishing gas flow.
  • an additional blow grille body is also provided in the inflow path of the quenching gas, for example between the arc space and a compression space or between the arc space and a heating space.
  • a blow grille body can also be formed by an insulating material body arranged between the compressed gas space and the arc space and provided with radial bores.
  • a further advantageous embodiment of the invention provides that the blow grille body has a plurality of passage openings which are axially spaced apart with respect to the longitudinal axis of the contact pieces.
  • blow grille body results in a particularly favorable distribution of the outflow of the quenching gas from the arc space and thus a particularly good enforcement of the arc space by the quenching gas flow.
  • the invention can advantageously be formed in that the blow grille body is rotationally symmetrical.
  • a further advantageous embodiment of the invention provides that the blow grille body is coaxially surrounded by a funnel-shaped extension of the insulating material body.
  • the funnel-shaped expansion of the insulating material body is used to form a nozzle, which accelerates the flow of extinguishing gas after passing through the narrow point in the funnel-shaped expansion.
  • the combination of the blow grille body with the surrounding, funnel-shaped insulating body results in front of the blow grille body, the above-described beneficial effect on the extinguishing gas flow and behind the insulating body, the nozzle action results in a rapid removal of the hot extinguishing gas.
  • the funnel-shaped expansion of the insulating body can protect the switch housing, which surrounds the actual interrupter unit, from the direct influence of the hot extinguishing gases.
  • the invention can be carried out particularly inexpensively in that the blow grille body is connected in one piece with the insulating material body.
  • the figure shows in longitudinal section part of an interrupter unit of a circuit breaker without a housing in a schematic form.
  • the arcing contact pieces 1, 2 are coaxially opposite one another, the drivable contact piece 2 having an insulating body 3 is firmly connected.
  • the drivable contact piece 2 is also connected to a coaxially surrounding drivable continuous current contact piece 4 which engages in the fixed continuous current contact 5 when switched on.
  • the insulating body 3 is also connected to the continuous current contact 4, for example by means of a clamp connection.
  • a heating chamber 6, partially delimited by the insulating material body 3, is provided, into which extinguishing gas can flow from the arc chamber 7 between the arcing contact pieces 1, 2 through the openings 8, 9 and which is heated and expanded by the action of an arcing.
  • a compression space 19 is arranged behind the heating space 6, in which cool quenching gas is compressed by a mechanical compression device, not shown, which, like the quenching gas stored in the heating space 6, is used for subsequent blowing of the arc.
  • the quenching gas flows through the openings 8, 9 of the insulating material body 3 back into the arc space.
  • the fixed, pin-shaped contact piece 1 has already passed the nozzle constriction 10, so that the extinguishing gas can flow past the nozzle constriction 10 and through the through openings 11, 12, 13 of the blow grille body 14 into the expansion space 15.
  • the blow grille body 14 is glued into the insulating body 3.
  • a funnel-shaped extension 16 of the insulating body surrounds the blow grille body 14 and allows the quenching gas to flow out accelerated.
  • the blow grille body 14 has at its end facing the contact piece 1 a seal 17, which on the one hand ensures that no quenching gas can escape at this point and that there are also no dielectrically highly stressed gaps between this part of the blow grille body 14 and the contact piece 1.
  • the seal 17 ensures a mechanically accurate and stable guidance of the insulating body and the drivable contact piece 2, 4 during the axial switching movement.

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  • Circuit Breakers (AREA)

Abstract

The circuit breaker has two coaxial contact members (1,2). At least the first of these is surrounded by an insulating material in the switched on condition. The device also has a pressurised gas chamber (6) in which, during a switching off process, extinguishing gas is stored under high pressure for a following blowing out of an arc. The first contact member (1) is preferably a large contact. In the switching process, this is movable relative to the insulator body (3). Between the insulation body (3) and the first contact (1) in the switched off condition, an exhaust channel is provided. This channel connects the arc chamber (7) with an expansion chamber (15). A blowing grating (14) made of insulating material is arranged in the exhaust channel. The grating (14) has several through apertures (11,12,13) for the extinguishing gas.

Description

Die Erfindung bezieht sich auf einen Hochspannungs-Leistungsschalter mit zwei einander koaxial gegenüberstehenden Kontaktstücken, von denen wenigstens das erste im Einschaltzustand von einem Isolierstoffkörper umgeben ist, und mit einem Druckgasraum, in dem im Zuge eines Ausschaltvorgangs Löschgas unter hohem Druck für eine nachfolgende Beblasung eines Lichtbogens gespeichert wird, wobei das erste, insbesondere massiv ausgebildete Kontaktstuck beim Schaltvorgang relativ zum Isolierstoffkörper bewegbar ist und wobei zwischen dem Isolierstoffkörper und dem ersten Kontaktstück im Ausschaltzustand ein Abströmkanal vorgesehen ist, der einen Lichtbogenraum mit einem Expansionsraum verbindet.The invention relates to a high-voltage circuit breaker with two mutually coaxial contact pieces, at least the first of which is surrounded by an insulating body when switched on, and with a compressed gas chamber in which, in the course of a switch-off process, quenching gas under high pressure for subsequent blowing of an arc is stored, the first, in particular solid contact piece being movable during the switching process relative to the insulating body and wherein an outflow channel is provided between the insulating body and the first contact piece in the switched-off state, which connects an arcing space with an expansion space.

Ein solcher Hochspannungs-Leistungsschalter ist beispielsweise aus der E-0 175 954 B1 und aus der E-0 296 363 A2 bekannt.Such a high-voltage circuit breaker is known, for example, from E-0 175 954 B1 and from E-0 296 363 A2.

Bei einem derartigen Leistungsschalter werden im Zuge einer Schaltbewegung zwei Kontaktstücke voneinander getrennt und gleichzeitig wird Löschgas durch Beheizung in Folge eines Lichtbogens und/oder durch mechanische Kompression unter Druck gesetzt. Dieses Löschgas dient zur Beblasung eines auftretenden Schaltlichtbogens. Die Löschgasströmung wird durch einen Isolierstoffkörper, insbesondere in Form einer Düse geführt, der mit einem der Kontaktstücke verbunden ist und im Ausschaltzustand in die Trennstrecke zwischen den Kontaktstücken hineinragt.In the case of such a circuit breaker, two contact pieces are separated from one another in the course of a switching movement and, at the same time, extinguishing gas is pressurized by heating as a result of an arc and / or by mechanical compression. This quenching gas is used to blow a switching arc that occurs. The extinguishing gas flow is guided through an insulating material body, in particular in the form of a nozzle, which is connected to one of the contact pieces and, in the switched-off state, protrudes into the separating distance between the contact pieces.

Bei den bekannten Konstruktionen verschließt ein Gegenkontaktstück eine Düsenengstelle des Isolierstoffkörpers zeitweise während der Ausschaltbewegung und gibt zum Ende der Schaltbewegung eine Öffnung frei, durch die das Löschgas dann in einen Expansionsraum abströmen kann. Dabei soll das abströmende Löschgas den Lichtbogen und die Umgebung der Kontakte sowie alle Bereiche, in denen hohe dielektrische Belastungen auftreten, kühlen. Es ist daher für eine optimale Steuerung der Löschgasströmung zu sorgen.In the known constructions, a mating contact piece temporarily closes a nozzle constriction of the insulating body during the switch-off movement and at the end of the switch movement opens an opening through which the extinguishing gas then can flow into an expansion space. The extinguishing gas flowing out should cool the arc and the vicinity of the contacts as well as all areas in which high dielectric loads occur. It is therefore necessary to ensure optimal control of the extinguishing gas flow.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, bei einem Hochspannungs-Leistungsschalter der eingangs genannten Art die Steuerung der Löschgasströmung und somit die Schaltleistung zu verbessern.The present invention is therefore based on the object of improving the control of the extinguishing gas flow and thus the switching performance in a high-voltage circuit breaker of the type mentioned at the outset.

Dabei kann sowohl das erste Kontaktstück als auch der Isolierstoffkörper antreibbar sein, denn für die Funktion kommt es nur auf eine Relativbewegung zwischen diesen Bauteilen an.Both the first contact piece and the insulating material body can be drivable, because for the function it is only a matter of a relative movement between these components.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß in dem Abströmkanal ein mit mehreren Durchtrittsöffnungen für das Löschgas versehener, aus Isolierstoff bestehender Blasgitterkörper angeordnet ist.The object is achieved in that in the outflow channel is provided with a plurality of openings for the extinguishing gas, made of insulating material blow grille body.

Dadurch daß das Löschgas nicht ungehindert in den Expansionsraum strömen kann, entsteht vor dem Blasgitterkörper ein Rückstau und eine Verwirbelung, die für eine optimale Kühlung des Lichtbogenraumes sorgt. Es bildet sich keine stationäre Löschgasströmung im Lichtbogenraum aus, so daß sowohl die Löschgasströmung gebremst wird als auch durch Verwirbelung jeder Punkt des Lichtbogenraumes gleichmäßig mit dem durchströmenden Löschgas durchsetzt wird. Hierdurch ergibt sich eine optimale Kühlung der dielektrisch hochbelasteten Bereiche.Because the quenching gas cannot flow unhindered into the expansion space, there is a backflow and swirling in front of the blow grille body, which ensures optimal cooling of the arc space. There is no steady-state quenching gas flow in the arc space, so that both the quenching gas flow is braked and each point of the arc space is interspersed with the flowing quenching gas evenly by swirling. This results in optimal cooling of the areas subjected to high dielectric loads.

Der Lichtbogen wird durch den Blasgitterkörper im Bereich zwischen den Lichtbogenkontaktstücken zentrisch geführt und bildet keine Schleifen. Somit kann durch das Blasgitter gleichzeitig der Lichtbogen eingegrenzt und das Löschgas durchgelassen werden.The arc is guided centrally by the blow grille body in the area between the arcing contact pieces and does not form any loops. Thus, the arc can be limited by the blow grille and the quenching gas can be let through.

Eine weitere Ausgestaltung der Erfindung sieht vor, daß der Isolierstoffkörper eine Engstelle aufweist, die im Einschaltzustand von dem ersten Kontaktstück im wesentlichen gasdicht verschlossen ist und daß der Blasgitterkörper im Verlauf der Löschgasströmung stromabwärts der Engstelle angeordnet ist.A further embodiment of the invention provides that the insulating body has a constriction, which is closed in a gas-tight manner by the first contact piece in the switched-on state and that the blow grille body is arranged downstream of the constriction in the course of the extinguishing gas flow.

Durch diese Konstruktion kann erst nach der Freigabe der Engstelle, d. h. nachdem sich im Lichtbogenraum ein hoher Gasdruck aufgebaut hat, das Löschgas durch die Öffnungen des Blasgitterkörpers hindurch abströmen. Die Ausbildung eines hohen Löschgasdrucks vor der Freigabe der Engstelle durch ein Gegenkontaktstück kann notwendig sein, um das Löschgas durch einen Schaltlichtbogen genügend zu erhitzen, um einen ausreichenden Druckgasvorrat für eine Beblasung des Lichtbogens zur Verfügung zu haben.Due to this construction, only after the throat has been released, i.e. H. after a high gas pressure has built up in the arc chamber, the quenching gas flows out through the openings of the blow grille body. The formation of a high extinguishing gas pressure prior to the release of the constriction by a counter-contact piece may be necessary in order to heat the extinguishing gas sufficiently by means of a switching arc in order to have a sufficient supply of compressed gas available for blowing the arc.

Es kann außerdem vorgesehen sein, daß auch im Zuströmweg des Löschgases ein zusätzlicher Blasgitterkörper, beispielsweise zwischen dem Lichtbogenraum und einem Kompressionsraum oder zwischen dem Lichtbogenraum und einem Heizraum vorgesehen ist. Ein solcher Blasgitterkörper kann auch durch einen zwischen dem Druckgasraum und dem Lichtbogenraum angeordneten, mit radialen Bohrungen versehenen Isolierstoffkörper gebildet sein.It can also be provided that an additional blow grille body is also provided in the inflow path of the quenching gas, for example between the arc space and a compression space or between the arc space and a heating space. Such a blow grille body can also be formed by an insulating material body arranged between the compressed gas space and the arc space and provided with radial bores.

Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Blasgitterkörper mehrere in bezug auf die Längsachse der Kontaktstücke axial voneinander beabstandete Durchtrittsöffnungen aufweist.A further advantageous embodiment of the invention provides that the blow grille body has a plurality of passage openings which are axially spaced apart with respect to the longitudinal axis of the contact pieces.

Durch diese Konstruktion des Blasgitterkörpers ergibt sich eine besonders günstige Verteilung der Abströmung des Löschgases aus dem Lichtbogenraum und somit eine besonders gute Durchsetzung des Lichtbogenraumes durch die Löschgasströmung.This construction of the blow grille body results in a particularly favorable distribution of the outflow of the quenching gas from the arc space and thus a particularly good enforcement of the arc space by the quenching gas flow.

Außerdem kann die Erfindung vorteilhaft dadurch ausgebildet sein, daß der Blasgitterkörper rotationssymmetrisch ausgebildet ist.In addition, the invention can advantageously be formed in that the blow grille body is rotationally symmetrical.

Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß der Blasgitterkörper von einer trichterförmigen Erweiterung des Isolierstoffkörpers koaxial umgeben ist.A further advantageous embodiment of the invention provides that the blow grille body is coaxially surrounded by a funnel-shaped extension of the insulating material body.

Die trichterförmige Erweiterung des Isolierstoffkörpers dient der Formung einer Düse, wodurch die Löschgasstromung nach Passieren der Engstelle in der trichterförmigen Erweiterung beschleunigt wird. Durch die Kombination des Blasgitterkörpers mit dem diesen umgebenden, trichterförmig erweiterten Isolierstoffkörper ergibt sich vor dem Blasgitterkörper die oben beschriebene günstige Wirkung auf die Löschgasströmung und hinter dem Isolierstoffkörper ergibt sich durch die Düsenwirkung ein schneller Abtransport des heißen Löschgases. Außerdem kann die trichterförmige Erweiterung des Isolierstoffkörpers das Schaltergehäuse, das die eigentliche Unterbrechereinheit umgibt, vor dem direkten Einfluß der heißen Löschgase schützen.The funnel-shaped expansion of the insulating material body is used to form a nozzle, which accelerates the flow of extinguishing gas after passing through the narrow point in the funnel-shaped expansion. The combination of the blow grille body with the surrounding, funnel-shaped insulating body results in front of the blow grille body, the above-described beneficial effect on the extinguishing gas flow and behind the insulating body, the nozzle action results in a rapid removal of the hot extinguishing gas. In addition, the funnel-shaped expansion of the insulating body can protect the switch housing, which surrounds the actual interrupter unit, from the direct influence of the hot extinguishing gases.

Besonders kostengünstig kann die Erfindung dadurch ausgeführt werden, daß der Blasgitterkörper mit dem Isolierstoffkörper einstückig zusammenhängt.The invention can be carried out particularly inexpensively in that the blow grille body is connected in one piece with the insulating material body.

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

Dabei zeigt die Figur im Längsschnitt einen Teil einer Unterbrechereinheit eines Leistungsschalters ohne ein Gehäuse in schematischer Form.The figure shows in longitudinal section part of an interrupter unit of a circuit breaker without a housing in a schematic form.

Die Lichtbogenkontaktstücke 1, 2 stehen einander koaxial gegenüber, wobei das antreibbare Kontaktstück 2 mit einem Isolierstoffkörper 3 fest verbunden ist. Das antreibbare Kontaktstück 2 ist außerdem mit einem dieses koaxial umgebenden antreibbaren Dauerstromkontaktstück 4 verbunden, das im Einschaltzustand in den feststehenden Dauerstromkontakt 5 eingreift.The arcing contact pieces 1, 2 are coaxially opposite one another, the drivable contact piece 2 having an insulating body 3 is firmly connected. The drivable contact piece 2 is also connected to a coaxially surrounding drivable continuous current contact piece 4 which engages in the fixed continuous current contact 5 when switched on.

Der Isolierstoffkörper 3 ist ebenfalls mit dem Dauerstromkontakt 4, beispielsweise mittels einer Klemmverbindung verbunden.The insulating body 3 is also connected to the continuous current contact 4, for example by means of a clamp connection.

Es ist ein teilweise von dem Isolierstoffkörper 3 begrenzter Heizraum 6 vorgesehen, in den von dem Lichtbogenraum 7 zwischen den Lichtbogenkontaktstücken 1, 2 aus durch die Öffnungen 8, 9 Löschgas einströmen kann, das durch die Wirkung eines Lichtbogens erhitzt und expandiert ist.A heating chamber 6, partially delimited by the insulating material body 3, is provided, into which extinguishing gas can flow from the arc chamber 7 between the arcing contact pieces 1, 2 through the openings 8, 9 and which is heated and expanded by the action of an arcing.

Außerdem ist hinter dem Heizraum 6 ein Kompressionsraum 19 angeordnet, in dem kühles Löschgas durch eine nicht näher dargestellte mechanische Kompressionsvorrichtung komprimiert wird, welches, ebenso wie das in dem Heizraum 6 gespeicherte Löschgas zu einer nachfolgenden Beblasung des Lichtbogens dient.In addition, a compression space 19 is arranged behind the heating space 6, in which cool quenching gas is compressed by a mechanical compression device, not shown, which, like the quenching gas stored in the heating space 6, is used for subsequent blowing of the arc.

Beim Beblasen des Lichtbogens strömt das Löschgas durch die Öffnungen 8, 9 des Isolierstoffkörpers 3 zurück in den Lichtbogenraum.When the arc is blown, the quenching gas flows through the openings 8, 9 of the insulating material body 3 back into the arc space.

Zu diesem Zeitpunkt hat das feststehende, stiftförmige Kontaktstück 1 bereits die Düsenengstelle 10 passiert, so daß das Löschgas an der Düsenengstelle 10 vorbei und durch die Durchtrittsöffnungen 11, 12, 13 des Blasgitterkörpers 14 hindurch in den Expansionsraum 15 abströmen kann.At this time, the fixed, pin-shaped contact piece 1 has already passed the nozzle constriction 10, so that the extinguishing gas can flow past the nozzle constriction 10 and through the through openings 11, 12, 13 of the blow grille body 14 into the expansion space 15.

Der Blasgitterkörper 14 ist in den Isolierstoffkörper 3 eingeklebt. Eine trichterförmige Erweiterung 16 des Isolierstoffkörpers umgibt den Blasgitterkörper 14 und läßt das Löschgas beschleunigt abströmen.The blow grille body 14 is glued into the insulating body 3. A funnel-shaped extension 16 of the insulating body surrounds the blow grille body 14 and allows the quenching gas to flow out accelerated.

Der Blasgitterkörper 14 weist an seinem dem Kontaktstück 1 zugewandten Ende eine Dichtung 17 auf, die einerseits dafür sorgt, daß an dieser Stelle kein Löschgas austreten kann und daß auch keine dielektrisch hochbelasteten Spalte zwischen diesem Teil des Blasgitterkörpers 14 und dem Kontaktstück 1 bestehen. Außerdem sorgt die Dichtung 17 für eine mechanisch genaue und stabile Führung des Isolierstoffkörpers und des antreibbaren Kontaktstückes 2, 4 bei der axialen Schaltbewegung.The blow grille body 14 has at its end facing the contact piece 1 a seal 17, which on the one hand ensures that no quenching gas can escape at this point and that there are also no dielectrically highly stressed gaps between this part of the blow grille body 14 and the contact piece 1. In addition, the seal 17 ensures a mechanically accurate and stable guidance of the insulating body and the drivable contact piece 2, 4 during the axial switching movement.

Claims (6)

Hochspannungs-Leistungsschalter mit zwei einander koaxial gegenüberstehenden Kontaktstücken (1, 2), von denen wenigstens das erste (1) im Einschaltzustand von einem Isolierstoffkörper (3) umgeben ist, und mit einem Druckgasraum (6), in dem im Zuge eines Ausschaltvorgangs Löschgas unter hohem Druck für eine nachfolgende Beblasung eines Lichtbogens gespeichert wird, wobei das erste, insbesondere massiv ausgebildete Kontaktstück (1) beim Schaltvorgang relativ zum Isolierstoffkörper (3) bewegbar ist und wobei zwischen dem Isolierstoffkörper (3) und dem ersten Kontaktstück (1) im Ausschaltzustand ein Abströmkanal vorgesehen ist, der den Lichtbogenraum (7) mit einem Expansionsraum (15) verbindet,
dadurch gekennzeichnet, daß
in dem Abströmkanal ein mit mehreren Durchtrittsöffnungen (11, 12, 13) für das Löschgas versehener, aus Isolierstoff bestehender Blasgitterkörper (14) angeordnet ist.
High-voltage circuit breaker with two coaxially opposed contact pieces (1, 2), at least the first (1) of which is surrounded by an insulating body (3) when it is switched on, and with a pressurized gas chamber (6) in which, in the course of a switch-off process, quenching gas underneath high pressure is stored for a subsequent blowing of an arc, the first, in particular solid contact piece (1) being movable during the switching process relative to the insulating body (3) and between the insulating body (3) and the first contact piece (1) in the switched-off state Outflow channel is provided which connects the arc space (7) with an expansion space (15),
characterized in that
A blow grille body (14) made of insulating material and provided with a plurality of through openings (11, 12, 13) for the extinguishing gas is arranged in the outflow channel.
Hochspannungs-Leistungsschalter nach Anspruch 1,
dadurch gekennzeichnet, daß
der Isolierstoffkörper (3) eine Engstelle (10) aufweist, die im Einschaltzustand von dem ersten Kontaktstück (1) im wesentlichen gasdicht verschlossen ist und daß der Blasgitterkörper (14) im Verlauf der Löschgasströmung stromabwärts der Engstelle (10) angeordnet ist.
High-voltage circuit breaker according to claim 1,
characterized in that
the insulating body (3) has a constriction (10) which is closed in a gas-tight manner by the first contact piece (1) in the switched-on state and that the blow grille body (14) is arranged downstream of the constriction (10) in the course of the extinguishing gas flow.
Hochspannungs-Leistungsschalter,
dadurch gekennzeichnet, daß
der Blasgitterkörper (14) mehrere in bezug auf die Längsachse der Kontaktstücke (1, 2) axial voneinander beabstandete Durchtritts-Öffnungen (11, 12, 13) aufweist.
High voltage circuit breaker,
characterized in that
the blow grille body (14) has a plurality of passage openings (11, 12, 13) which are axially spaced apart from one another with respect to the longitudinal axis of the contact pieces (1, 2).
Hochspannungs-Leistungsschalter nach Anspruch 1 oder einem der folgenden,
dadurch gekennzeichnet, daß
der Blasgitterkörper (14) rotationssymmetrisch ausgebildet ist.
High-voltage circuit breaker according to claim 1 or one of the following,
characterized in that
the blow grille body (14) is rotationally symmetrical.
Hochspannungs-Leistungsschalter nach Anspruch 1 oder einem der folgenden,
dadurch gekennzeichnet, daß
der Blasgitterkörper (14) von einer trichterförmigen Erweiterung (16) des Isolierstoffkörpers (3) koaxial umgeben ist.
High-voltage circuit breaker according to claim 1 or one of the following,
characterized in that
the blow grille body (14) is coaxially surrounded by a funnel-shaped extension (16) of the insulating material body (3).
Hochspannungs-Leistungsschalter nach Anspruch 1 oder einem der folgenden,
dadurch gekennzeichnet, daß
der Blasgitterkörper (14) mit dem Isolierstoffkörper (3) einstückig zusammenhängt.
High-voltage circuit breaker according to claim 1 or one of the following,
characterized in that
the blow grille body (14) is integrally connected to the insulating body (3).
EP96250153A 1995-07-13 1996-07-10 High voltage circuit breaker with an insulating body Ceased EP0753873A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19526805 1995-07-13
DE1995126805 DE19526805A1 (en) 1995-07-13 1995-07-13 High-voltage circuit breaker with an insulating body

Publications (1)

Publication Number Publication Date
EP0753873A1 true EP0753873A1 (en) 1997-01-15

Family

ID=7767522

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96250153A Ceased EP0753873A1 (en) 1995-07-13 1996-07-10 High voltage circuit breaker with an insulating body

Country Status (2)

Country Link
EP (1) EP0753873A1 (en)
DE (1) DE19526805A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1444713B2 (en) 2001-11-14 2009-11-11 Siemens Aktiengesellschaft Power switch
WO2010091943A1 (en) * 2009-02-13 2010-08-19 Siemens Aktiengesellschaft Switchgear arrangement
EP2827353A1 (en) 2013-07-18 2015-01-21 ABB Technology AG Electrical switching device
WO2016124175A1 (en) * 2015-02-04 2016-08-11 Rwth Aachen Power switch

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009009452A1 (en) * 2009-02-13 2010-08-19 Siemens Aktiengesellschaft Switchgear assembly with a switching path

Citations (4)

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FR1500340A (en) * 1966-09-22 1967-11-03 Shut-off nozzle for compressed gas switch
EP0175954A2 (en) * 1984-09-26 1986-04-02 BBC Brown Boveri AG Compressed gas circuit breaker
EP0296363A2 (en) * 1987-06-24 1988-12-28 Licentia Patent-Verwaltungs-GmbH Circuit breaker with selfproduced flow of extinguishing gas
FR2692400A1 (en) * 1992-06-10 1993-12-17 Alsthom Gec High voltage circuit breaker with several divergent blower sections - has cut=off chamber filled with dielectric gas and fixed arc contact joined to channel sections which have annular metallic electrodes

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Publication number Priority date Publication date Assignee Title
CH654140A5 (en) * 1980-12-23 1986-01-31 Bbc Brown Boveri & Cie HIGH VOLTAGE CIRCUIT BREAKERS.
DE4018169A1 (en) * 1990-06-01 1991-12-05 Siemens Ag HV power circuit breaker with arc extinction system - supplies extinction gas to hollow switch contacts by openings blocked by sliders until given point after switch opening
DE9116369U1 (en) * 1991-08-05 1992-10-01 Siemens AG, 8000 München High-voltage circuit breakers
DE4200896A1 (en) * 1992-01-13 1993-07-15 Siemens Ag HV power switch with compression cylinder - has screen which surrounds constant current contact on metal cylinder cover when switched on.
DE4217232A1 (en) * 1992-05-20 1993-11-25 Siemens Ag Electrical high-voltage power switch - has compression system for quenching gas with cylinder floors made of material with good electrical conductivity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1500340A (en) * 1966-09-22 1967-11-03 Shut-off nozzle for compressed gas switch
EP0175954A2 (en) * 1984-09-26 1986-04-02 BBC Brown Boveri AG Compressed gas circuit breaker
EP0296363A2 (en) * 1987-06-24 1988-12-28 Licentia Patent-Verwaltungs-GmbH Circuit breaker with selfproduced flow of extinguishing gas
FR2692400A1 (en) * 1992-06-10 1993-12-17 Alsthom Gec High voltage circuit breaker with several divergent blower sections - has cut=off chamber filled with dielectric gas and fixed arc contact joined to channel sections which have annular metallic electrodes

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1444713B2 (en) 2001-11-14 2009-11-11 Siemens Aktiengesellschaft Power switch
WO2010091943A1 (en) * 2009-02-13 2010-08-19 Siemens Aktiengesellschaft Switchgear arrangement
EP2827353A1 (en) 2013-07-18 2015-01-21 ABB Technology AG Electrical switching device
WO2016124175A1 (en) * 2015-02-04 2016-08-11 Rwth Aachen Power switch

Also Published As

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