EP1064664A1 - High voltage power circuit breaker with an insulation nozzle - Google Patents

High voltage power circuit breaker with an insulation nozzle

Info

Publication number
EP1064664A1
EP1064664A1 EP99915472A EP99915472A EP1064664A1 EP 1064664 A1 EP1064664 A1 EP 1064664A1 EP 99915472 A EP99915472 A EP 99915472A EP 99915472 A EP99915472 A EP 99915472A EP 1064664 A1 EP1064664 A1 EP 1064664A1
Authority
EP
European Patent Office
Prior art keywords
arcing contact
channel
circuit breaker
shaft
end piece
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.)
Withdrawn
Application number
EP99915472A
Other languages
German (de)
French (fr)
Inventor
Ralf Bergmann
Hold Dienemann
Volker Lehmann
Heiner Marin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7859590&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1064664(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP02090369A priority Critical patent/EP1306868B1/en
Publication of EP1064664A1 publication Critical patent/EP1064664A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • 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
    • H01H33/7023—Switches 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

Definitions

  • the invention relates to a high voltage circuit breaker with two mutually coaxially opposed arcing contact pieces and a Isoliers' toffdüse surrounding at least during the breaking a circuit path between the arcing contact pieces, and having a through passage which is tamped in the ON state of a first of the arcing contact pieces, which has a Shaft and an end piece with a reduced diameter compared to the shaft.
  • Such a high-voltage circuit breaker is known, for example, from US 4,342,890.
  • the arcing contact pieces are separated from one another in the axial direction during the switching-off process, whereupon an arcing arises between them in the switching path in many switching cases.
  • This arc heats up the extinguishing gas, usually SF 6 , and flows into a boiler room, where it is temporarily stored. From there, the extinguishing gas, which is under high pressure, then reaches the switching path when the current passes through zero and the arc is extinguished accordingly, in order to cool it and to prevent the arc from reigniting.
  • the insulating material nozzle is intended to align the flow of extinguishing gas, to accelerate the flow of extinguishing gas and to control it.
  • the passage duct of the insulating material nozzle is closed by an arcing contact piece until the extinguishing position is reached, so that a high quenching gas pressure can initially build up in the switching path, which results in an intensive flow after opening the passage duct. 2
  • Form arcing contact piece with a reduced diameter compared to the shaft so that in the time period when the arcing contact piece releases the through channel, there is a gas gap between the end piece of the arcing contact piece and the wall of the through channel, which is intended to prevent or reduce dielectric problems.
  • the present invention is therefore based on the object of providing a high-voltage circuit breaker of the type mentioned at the outset, in which, on the one hand, the greatest possible amount of extinguishing gas is available in the region of the switching path when the insulating contact is released by the arcing contact piece, and on the other hand the dielectric strength is ensured in the area between the end piece of the arcing contact piece and the material of the insulating material nozzle.
  • the through-channel has a cylindrical region whose diameter is only slightly larger than the diameter of the shaft.
  • the configuration according to the invention ensures that, on the one hand, the through channel is largely displaced until it is released by the shaft of the first arcing contact is closed and that from the time of opening of the through-channel to the end piece of the arcing contact piece is already separated from the material of the insulating material nozzle by a sufficient gap so that the dielectric stress in the intermediate region between the first arcing contact piece and the material of the insulating material nozzle is reduced.
  • An advantageous embodiment of the invention provides that the length of the end piece is greater than the length of the cylindrical region.
  • a further advantageous embodiment of the invention provides that the length of the cylindrical region is greater than its diameter, in particular greater than twice the diameter. It can also be advantageously provided that the length is greater than three or four times the diameter of the cylindrical region.
  • the aspect ratios of the end piece and the cylindrical region ensure that at the time when the free end of the end piece is retracted into the through channel and the dielectric load between this free end and the wall of the through channel is particularly high, the through channel through the shaft is already released. As a result, there is already a quenching gas flow at this point, which prevents flashovers at the free end of the end piece.
  • the opening of the through-channel only takes place after a large stroke of the contact pin, so that a high extinguishing gas pressure can form in the heating or compression space for a long time before the extinguishing gas flow is formed.
  • a further advantageous embodiment of the invention provides that a conical transition area is provided between the end piece and the shaft of the first arcing contact piece.
  • the through-channel has a conical widening at the end of the cylindrical region facing away from the second arcing contact piece.
  • the invention is shown on the basis of an exemplary embodiment in a drawing and described below:
  • the figure shows schematically a part of the interrupter unit of a high-voltage circuit breaker according to the invention.
  • arcing contact pieces 1, 2 coaxially face each other.
  • the first arcing contact piece 1 is designed to be stationary or can be driven separately, while the second arcing contact piece 2, which has the shape of a tulip contact, can be driven in the direction of arrow 14 in order to carry out a switching-off movement and in the opposite direction to carry out a switching-on movement.
  • an insulating body 3 in the form of an insulating nozzle is firmly connected, which consists of polytetrafluoroethylene.
  • the insulating material nozzle 3 has a through-channel 6 which is penetrated and insulated by the first arcing contact piece 1 in the switched-on state.
  • a first continuous current contact piece 13 and a second continuous current contact piece 12 are arranged radially outside the insulating material nozzle 3 and surrounding it, which are also in contact with one another in the switched-on state and carry the nominal current.
  • a heating chamber 16 is formed, which is connected via a channel 15 to the through channel 6 of the nozzle or to the arc chamber formed between the arcing contact pieces 1, 2.
  • an arc 4 can arise between the arcing contact pieces 1 , 2, which heats up the quenching gas located in the arcing chamber 5, for example SF 6 , and thus brings it to expansion.
  • the extinguishing gas can then flow into the boiler room 16 and is temporarily stored there. saves until the arc 4 goes out due to a current zero crossing of the current to be switched and the quenching gas flows back from the heating chamber 16 through the duct 15 into the arc chamber 5 in order to bring about rapid cooling there and thus prevent the flashback of an arc 4.
  • the through-channel 6 is still blocked by the first arcing contact 1.
  • the diameter of the through-channel 6 corresponds in the cylindrical region to the outer diameter of the shaft 8 of the first arcing contact piece 1.
  • the through channel 6 is in an essential area
  • Shaft 8 with the through channel 6 leads to an effective seal.
  • the second phase of the switch-off movement begins with the separation of the first arcing contact piece 1 from the second

Landscapes

  • Circuit Breakers (AREA)

Abstract

The invention relates to a high voltage power circuit breaker with two arcing contacts (1, 2) situated coaxially opposite each other and an insulation nozzle which is dammed by the first arcing contact (1) when switched on. The first arcing contact (1) has a shaft (8) with an enlarged diameter and an end piece (7) with a reduced diameter. Said shaft (8) dams a through channel (6) of the insulation body (3). The through channel (6) is cylindrical in form over a shorter length than the length of the end piece (7). The stream of arc extinguishing gas is therefore introduced when the end piece (7) is drawn back into the through channel (6).

Description

Beschreibungdescription
Hochspannungsleistungsschalter mit einer IsolierstoffdüseHigh-voltage circuit breaker with an insulating nozzle
Die Erfindung bezieht sich auf einen Hochspannungsleistungsschalter mit zwei einander koaxial gegenüberstehenden Lichtbogenkontaktstücken und mit einer Isoliers'toffdüse, die wenigstens während des Ausschaltvorganges eine Schaltstrecke zwischen den Lichtbogenkontaktstücken umgibt und die einen Durchgangskanal aufweist, der im Einschaltzustand von einem ersten der Lichtbogenkontaktstücke verdämmt ist, welches einen Schaft und ein Endstück mit gegenüber dem Schaft verringertem Durchmesser aufweist.The invention relates to a high voltage circuit breaker with two mutually coaxially opposed arcing contact pieces and a Isoliers' toffdüse surrounding at least during the breaking a circuit path between the arcing contact pieces, and having a through passage which is tamped in the ON state of a first of the arcing contact pieces, which has a Shaft and an end piece with a reduced diameter compared to the shaft.
Ein derartiger Hochspannungsleistungsschalter ist beispielsweise aus der US 4 342 890 bekannt. Bei einem derartigen Schalter werden während des Ausschaltvorganges die Lichtbogenkontaktstücke in axialer Richtung voneinander getrennt, worauf sich in vielen Schaltfällen ein Lichtbogen zwischen diesen in der Schaltstrecke ausbildet. Durch diesen Lichtbogen wird das vorhandene Löschgas, üblicherweise SF6, aufgeheizt und strömt in einen Heizraum, wo es zwischengespeichert wird. Von dort gelangt das unter hohem Druck stehende Löschgas dann bei einem Stromnulldurchgang und entsprechendem Ver- löschen des Lichtbogens in den Lichtbogenraum zur Schaltstrecke, um diese zu kühlen und eine Rückzündung des Lichtbogens zu verhindern. Die Isolierstoffdüse ist zur Ausrichtung des Löschgasstromes, zur Beschleunigung des Löschgasstromes und zu seiner Steuerung vorgesehen. Insbesondere ist der Durchgangskanal der Isolierstoffdüse bis zum Erreichen der Löschposition durch ein Lichtbogenkontaktstück verschlossen, so daß sich zunächst ein hoher Löschgasdruck in der Schaltstrecke aufbauen kann, der eine intensive Strömung nach Öffnen des Durchgangskanals zur Folge hat. 2Such a high-voltage circuit breaker is known, for example, from US 4,342,890. In the case of such a switch, the arcing contact pieces are separated from one another in the axial direction during the switching-off process, whereupon an arcing arises between them in the switching path in many switching cases. This arc heats up the extinguishing gas, usually SF 6 , and flows into a boiler room, where it is temporarily stored. From there, the extinguishing gas, which is under high pressure, then reaches the switching path when the current passes through zero and the arc is extinguished accordingly, in order to cool it and to prevent the arc from reigniting. The insulating material nozzle is intended to align the flow of extinguishing gas, to accelerate the flow of extinguishing gas and to control it. In particular, the passage duct of the insulating material nozzle is closed by an arcing contact piece until the extinguishing position is reached, so that a high quenching gas pressure can initially build up in the switching path, which results in an intensive flow after opening the passage duct. 2
Es ist bekannt, daß insbesondere der Zwischenraum zwischen dem Lichtbogenkontaktstück, das den Durchgangskanal zeitweilig verdämmt und dem Material der Isolierstoffdüse dielektrische Probleme infolge der hohen vorliegenden Feldstärke entstehen können. Daher ist es bekannt, ein Endstück desIt is known that in particular the space between the arcing contact piece, which temporarily blocks the through-channel and the material of the insulating material nozzle, can cause dielectric problems due to the high field strength present. Therefore, it is known to be an end piece of the
Lichtbogenkontaktstückes mit gegenüber dem Schaft verringertem Durchmesser auszubilden, so daß in dem Zeitbereich, wenn das Lichtbogenkontaktstück den Durchgangskanal freigibt, ein Gasspalt zwischen dem Endstück des Lichtbogenkontaktstücks und der Wand des Durchgangskanals besteht, der dielektrische Probleme verhindern oder verringern soll.Form arcing contact piece with a reduced diameter compared to the shaft, so that in the time period when the arcing contact piece releases the through channel, there is a gas gap between the end piece of the arcing contact piece and the wall of the through channel, which is intended to prevent or reduce dielectric problems.
Ein hiermit zusammenhängendes Problem besteht jedoch darin, daß in einem solchen Spalt vorzeitig Löschgas aus der Schalt- strecke entweichen kann, das zu einer nachfolgenden Kühlung der Schaltstrecke dann nicht mehr beiträgt.A problem associated with this, however, is that in such a gap, extinguishing gas can escape prematurely from the switching path, which then no longer contributes to subsequent cooling of the switching path.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen Hochspannungsleistungsschalter der eingangs genannten Art zu schaffen, bei dem einerseits bei der Freigabe der Iso- lierstoffdüse durch das Lichtbogenkontaktstück noch eine möglichst große Menge Löschgas im Bereich der Schaltstrecke zur Verfügung steht, und bei dem andererseits die dielektrische Festigkeit in dem Bereich zwischen dem Endstück des Lichtbo- genkontaktstückes und dem Material der Isolierstoffdüse gewährleistet ist.The present invention is therefore based on the object of providing a high-voltage circuit breaker of the type mentioned at the outset, in which, on the one hand, the greatest possible amount of extinguishing gas is available in the region of the switching path when the insulating contact is released by the arcing contact piece, and on the other hand the dielectric strength is ensured in the area between the end piece of the arcing contact piece and the material of the insulating material nozzle.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Durchgangskanal einen zylindrischen Bereich aufweist, dessen Durchmesser nur geringfügig größer ist als der Durchmesser des Schaftes.The object is achieved in that the through-channel has a cylindrical region whose diameter is only slightly larger than the diameter of the shaft.
Durch die erfindungsgemäße Ausgestaltung ist gewährleistet, daß einerseits der Durchgangskanal bis zur Freigabe durch den Schaft des ersten Lichtbogenkontaktstücks weitgehend ver- schlössen ist und daß vom Zeitpunkt der Öffnung des Durchgangskanals an das Endstück des Lichtbogenkontaktstücks bereits durch einen ausreichenden Spalt von dem Material der Isolierstoffdüse getrennt ist, so daß die dielektrische Bean- spruchung in dem Zwischenbereich zwischen dem ersten Lichtbogenkontaktstück und dem Werkstoff der Isolierstoffdüse herabgesetzt ist.The configuration according to the invention ensures that, on the one hand, the through channel is largely displaced until it is released by the shaft of the first arcing contact is closed and that from the time of opening of the through-channel to the end piece of the arcing contact piece is already separated from the material of the insulating material nozzle by a sufficient gap so that the dielectric stress in the intermediate region between the first arcing contact piece and the material of the insulating material nozzle is reduced.
Es ist hierdurch auch eine gute Abdichtung des Durchgangska- nals durch das erste Lichtbogenkontaktstück erreicht, solange der Schaft den zylindrischen Bereich des Durchgangskanals blockiert. Zwischen dem Außendurchmesser des Schaftes und der Wand des Durchgangskanals muß aus Toleranzgründen und um eine leichte Bewegbarkeit des Lichtbogenkontaktstücks zu gewährleisten, zwar eine gewisse Spaltbreite vorgesehen sein, jedoch ist dieser Spalt so schmal, daß dort wenig Löschgas verlorengeht, insbesondere dadurch, daß wenigstens zu Anfang eines Ausschaltvorganges der Durchgangskanal auf einer großen Länge blockiert ist, so daß das Löschgas über eine große Länge durch den Spalt strömen muß, um in einen Expansionsraum zu gelangen. Dies ist mittels einer bekannten Düse mit einer lokalen Engstelle praktisch nicht erreichbar.In this way, a good sealing of the through-channel by the first arcing contact piece is achieved as long as the shaft blocks the cylindrical region of the through-channel. For tolerance reasons and to ensure that the arcing contact piece can be moved easily, a certain gap width must be provided between the outer diameter of the shaft and the wall of the through-channel, but this gap is so narrow that little quenching gas is lost there, in particular because at least initially a switch-off process, the through-channel is blocked over a long length, so that the extinguishing gas must flow over a long length through the gap in order to get into an expansion space. This is practically impossible to achieve using a known nozzle with a local constriction.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß die Länge des Endstücks größer ist als die Länge des zylindrischen Bereichs.An advantageous embodiment of the invention provides that the length of the end piece is greater than the length of the cylindrical region.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß die Länge des zylindrischen Bereichs größer ist als sein Durchmesser, insbesondere größer als das Doppelte des Durchmessers. Es kann auch vorteilhaft vorgesehen sein, daß die Länge größer ist als das Drei- oder Vierfache des Durchmessers des zylindrischen Bereichs. Durch die Längenverhältnisse des Endstücks und des zylindrischen Bereichs ist sichergestellt, daß zu dem Zeitpunkt, wenn das freie Ende des Endstücks in den Durchgangskanal zurückgezogen wird und die dielektrische Belastung zwischen diesem freien Ende und der Wand des Durchgangskanals besonders groß ist, der Durchgangskanal durch den Schaft schon freigegeben ist. Hierdurch besteht zu diesem Zeitpunkt schon eine Löschgasströmung, die am freien Ende des Endstücks Überschläge verhindert .A further advantageous embodiment of the invention provides that the length of the cylindrical region is greater than its diameter, in particular greater than twice the diameter. It can also be advantageously provided that the length is greater than three or four times the diameter of the cylindrical region. The aspect ratios of the end piece and the cylindrical region ensure that at the time when the free end of the end piece is retracted into the through channel and the dielectric load between this free end and the wall of the through channel is particularly high, the through channel through the shaft is already released. As a result, there is already a quenching gas flow at this point, which prevents flashovers at the free end of the end piece.
Insbesondere bei einer großen Länge des zylindrischen Bereichs ergibt sich ein hoher Strömungswiderstand durch den schmalen, zwischen dem Schaft und der Wand des Durchgangskanals gebildeten Spalt und damit eine gute Abdichtung.In particular with a long length of the cylindrical region, there is a high flow resistance due to the narrow gap formed between the shaft and the wall of the through-channel and thus a good seal.
Die Öffnung des Durchgangskanals geschieht erst nach einem großen Hub des Kontaktstiftes, so daß sich vor Ausbildung der Löschgasströmung über eine lange Zeit ein hoher Löschgasdruck im Heiz- bzw. Kompressionsraum ausbilden kann.The opening of the through-channel only takes place after a large stroke of the contact pin, so that a high extinguishing gas pressure can form in the heating or compression space for a long time before the extinguishing gas flow is formed.
Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß zwischen dem Endstück und dem Schaft des ersten Lichtbogenkontaktstücks ein konischer Übergangsbereich vorgesehen ist.A further advantageous embodiment of the invention provides that a conical transition area is provided between the end piece and the shaft of the first arcing contact piece.
Weiterhin kann vorteilhaft vorgesehen sein, daß der Durchgangskanal an dem dem zweiten Lichtbogenkontaktstück abgewandten Ende des zylindrischen Bereichs eine konische Erweiterung aufweist.Furthermore, it can advantageously be provided that the through-channel has a conical widening at the end of the cylindrical region facing away from the second arcing contact piece.
Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels in einer Zeichnung gezeigt und nachfolgend beschrieben: Dabei zeigt die Figur schematisch einen Teil der Unterbrechereinheit eines erfindungsgemäßen Hochspannungsleistungs- schalters .In the following, the invention is shown on the basis of an exemplary embodiment in a drawing and described below: The figure shows schematically a part of the interrupter unit of a high-voltage circuit breaker according to the invention.
In einem isolierenden Leistungsschaltergehäuse 18, das beispielsweise aus Porzellan oder einem Verbundwerkstoff besteht, stehen einander zwei Lichtbogenkontaktstücke 1,2 koaxial gegenüber. Das erste Lichtbogenkontaktstück 1 ist feststehend ausgebildet bzw. getrennt antreibbar, während das zweite Lichtbogenkontaktstück 2, das die Form eines Tulpenkontakts aufweist, in Richtung des Pfeiles 14 zur Ausführung einer Ausschaltbewegung und in umgekehrter Richtung zur Ausführung einer Einschaltbewegung antreibbar ist.In an insulating circuit breaker housing 18, which consists for example of porcelain or a composite material, two arcing contact pieces 1, 2 coaxially face each other. The first arcing contact piece 1 is designed to be stationary or can be driven separately, while the second arcing contact piece 2, which has the shape of a tulip contact, can be driven in the direction of arrow 14 in order to carry out a switching-off movement and in the opposite direction to carry out a switching-on movement.
Mit dem zweiten Lichtbogenkontaktstück 2 ist ein Isolierstoffkörper 3 in Form einer Isolierstoffdüse fest verbunden, die aus Polytetrafluoräthylen besteht. Die Isolierstoffdüse 3 weist einen Durchgangskanal 6 auf, der im Einschaltzustand von dem ersten Lichtbogenkontaktstück 1 durchsetzt und ver- dämmt ist. Radial außerhalb der Isolierstoffdüse 3 und diese umgebend sind ein erstes Dauerstromkontaktstück 13 und ein zweites Dauerstromkontaktstück 12 angeordnet, die im Einschaltzustand ebenfalls miteinander in Kontakt stehen und den Nennstrom tragen.With the second arcing contact 2, an insulating body 3 in the form of an insulating nozzle is firmly connected, which consists of polytetrafluoroethylene. The insulating material nozzle 3 has a through-channel 6 which is penetrated and insulated by the first arcing contact piece 1 in the switched-on state. A first continuous current contact piece 13 and a second continuous current contact piece 12 are arranged radially outside the insulating material nozzle 3 and surrounding it, which are also in contact with one another in the switched-on state and carry the nominal current.
Außerdem ist ein Heizraum 16 gebildet, der über einen Kanal 15 mit dem Durchgangskanal 6 der Düse bzw. dem zwischen den Lichtbogenkontaktstücken 1,2 gebildeten Lichtbogenraum verbunden ist.In addition, a heating chamber 16 is formed, which is connected via a channel 15 to the through channel 6 of the nozzle or to the arc chamber formed between the arcing contact pieces 1, 2.
Während der Ausschaltbewegung kann ein Lichtbogen 4 zwischen den Lichtbogenkontaktstücken 1,2 entstehen, der das im Lichtbogenraum 5 befindliche Löschgas, beispielsweise SF6, aufheizt und damit zur Expansion bringt. Das Löschgas kann dann in den Heizraum 16 abströmen und wird dort vorübergehend ge- speichert, bis wegen eines Stromnulldurchgangs des zu schaltenden Stromes der Lichtbogen 4 erlischt und das Löschgas aus dem Heizraum 16 durch den Kanal 15 in den Lichtbogenraum 5 zurückströmt, um dort eine rasche Kühlung herbeizuführen und somit die Rückzündung eines Lichtbogens 4 zu verhindern.During the switch-off movement, an arc 4 can arise between the arcing contact pieces 1 , 2, which heats up the quenching gas located in the arcing chamber 5, for example SF 6 , and thus brings it to expansion. The extinguishing gas can then flow into the boiler room 16 and is temporarily stored there. saves until the arc 4 goes out due to a current zero crossing of the current to be switched and the quenching gas flows back from the heating chamber 16 through the duct 15 into the arc chamber 5 in order to bring about rapid cooling there and thus prevent the flashback of an arc 4.
In der ersten Phase der Ausschaltbewegung, wenn das erste Lichtbogenkontaktstück 1 noch mit dem zweiten Lichtbogenkontaktstück 2 in elektrisch leitender Verbindung steht, ist der Durchgangskanal 6 noch durch das erste Lichtbogenkontaktstück 1 verdämmt. Der Durchmesser des Durchgangskanals 6 entspricht in dem zylindrischen Bereich dem Außendurchmesser des Schaftes 8 des ersten Lichtbogenkontaktstücks 1.In the first phase of the switch-off movement, when the first arcing contact 1 is still in an electrically conductive connection with the second arcing contact 2, the through-channel 6 is still blocked by the first arcing contact 1. The diameter of the through-channel 6 corresponds in the cylindrical region to the outer diameter of the shaft 8 of the first arcing contact piece 1.
Der Durchgangskanal 6 ist in einem wesentlichen BereichThe through channel 6 is in an essential area
17seiner Länge zylindrisch gestaltet, so daß einerseits die Verdammung durch das erste Lichtbogenkontaktstück 1 beim Ausschalten solange andauert, bis ein genügender Löschgasdruck im Lichtbogenraum 5 bzw. im Heizraum 16 erreicht ist und daß andererseits eine große axiale Überlappung des17 its length is cylindrical, so that on the one hand the damaging by the first arcing contact 1 when switched off continues until a sufficient quenching gas pressure is reached in the arcing chamber 5 or in the heating chamber 16 and on the other hand that there is a large axial overlap of the
Schafts 8 mit dem Durchgangskanal 6 zu einer effektiven Dichtung führt.Shaft 8 with the through channel 6 leads to an effective seal.
Die zweite Phase der Ausschaltbewegung beginnt mit der Tren- nung des ersten Lichtbogenkontaktstückes 1 von dem zweitenThe second phase of the switch-off movement begins with the separation of the first arcing contact piece 1 from the second
Lichtbogenkontaktstück 2. Jetzt entsteht zwischen den Lichtbogenkontaktstücken 1 und 2 ein Lichtbogen, der das Gas im Lichtbogenraum 5 aufheizt und expandieren läßt. Zu diesem Zeitpunkt oder etwas später verläßt der Schaft 8 den zylin- drischen Bereich 17 des Durchgangskanals 6. Dieser wird jetzt nur noch durch das Endstück 7 verdämmt, so daß ein Teil des expandierten Löschgases den Spalt zwischen dem Endstück 7 und dem zylindrischen Bereich 17 des Durchgangskanals 6 durchströmen kann und so die dielektrischen Probleme in dem Spalt verringert. Das durchströmende Löschgas bewirkt unter anderem die dielek¬ trische Verfestigung des Zwischenraumes zwischen dem Endstück 7 und dem Isolierstoff körper 3. Arcing contact piece 2. Now an arcing arises between the arcing contact pieces 1 and 2, which heats the gas in the arcing space 5 and allows it to expand. At this time or somewhat later, the shaft 8 leaves the cylindrical region 17 of the through-channel 6. This is now only blocked by the end piece 7, so that part of the expanded extinguishing gas clears the gap between the end piece 7 and the cylindrical area 17 of the Can flow through channel 6 and thus reduces the dielectric problems in the gap. The flow of extinguishing gas causes, among other things dielek ¬ tric solidification of the intermediate space between the end piece 7 and the insulating body. 3

Claims

8Patentansprüche 8 patent claims
1. Hochspannungsleistungsschalter mit zwei einander koaxial gegenüberstehenden Lichtbogenkontaktstücken (1,2) und mit einer Isolierstoffdüse (3) , die wenigstens während des Ausschaltvorganges eine Schaltstrecke zwischen den Lichtbogenkontaktstücken (1,2) umgibt und die einen Durchgangskanal (6) aufweist, der im Einschaltzustand von einem ersten der Lichtbogenkontaktstücke (1) verdämmt ist, welches einen Schaft (8) und ein Endstück (7) gegenüber dem Schaft (8) verringertem Durchmesser aufweist, d a d u r c h g e k e n n z e i c h n e t , daß der Durchgangskanal (6) einen zylindrischen Bereich (17) aufweist, dessen Durchmesser nur geringfügig größer ist als der Durchmesser des Schaftes (8).1. High-voltage circuit breaker with two coaxially opposing arcing contact pieces (1, 2) and with an insulating nozzle (3) which surrounds a switching path between the arcing contact pieces (1, 2) at least during the switch-off process and which has a through channel (6) which is in the on state is blocked by a first of the arcing contact pieces (1), which has a shaft (8) and an end piece (7) with respect to the shaft (8) of reduced diameter, characterized in that the through-channel (6) has a cylindrical region (17), the Diameter is only slightly larger than the diameter of the shaft (8).
2. Hochspannungsleistungsschalter nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Länge des Endstücks (7) größer ist als die Länge des zylindrischen Bereichs (17) .2. High-voltage circuit breaker according to claim 1, so that the length of the end piece (7) is greater than the length of the cylindrical region (17).
3. Hochspannungsleistungsschalter nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t , daß die Länge des zylindrischen Bereichs (17) größer ist als sein Durchmesser, insbesondere größer als das Doppelte des Durchmessers .3. High-voltage circuit breaker according to claim 1 or 2, d a d u r c h g e k e n n z e i c h n e t that the length of the cylindrical portion (17) is greater than its diameter, in particular greater than twice the diameter.
4. Hochspannungsleistungsschalter nach Anspruch 1 oder einem der folgenden, d a d u r c h g e k e n n z e i c h n e t , daß zwischen dem Endstück (7) und dem Schaft (8) des ersten Lichtbogenkontaktstücks (1) ein konischer Übergangsbereich (10) vorgesehen ist. 94. High-voltage circuit breaker according to claim 1 or one of the following, characterized in that a conical transition region (10) is provided between the end piece (7) and the shaft (8) of the first arcing contact piece (1). 9
5. Hochspannungsleistungsschalter nach Anspruch 1 oder einem der folgenden, d a d u r c h g e k e n n z e i c h n e t , daß der Durchgangskanal (6) an dem dem zweiten Lichtbogenkontaktstück (2) abgewandten Ende des zylindrischen Bereichs (17) eine konische Erweiterung aufweist. 5. High-voltage circuit breaker according to claim 1 or one of the following, d a d u r c h g e k e n n z e i c h n e t that the through-channel (6) at the end of the cylindrical region (17) facing away from the second arcing contact piece (2) has a conical extension.
EP99915472A 1998-02-25 1999-02-05 High voltage power circuit breaker with an insulation nozzle Withdrawn EP1064664A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02090369A EP1306868B1 (en) 1998-02-25 1999-02-05 High voltage power circuit breaker with insulating nozzle

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19809088 1998-02-25
DE19809088A DE19809088C1 (en) 1998-02-25 1998-02-25 High-voltage circuit breaker with an insulating nozzle
PCT/DE1999/000378 WO1999044213A1 (en) 1998-02-25 1999-02-05 High voltage power circuit breaker with an insulation nozzle

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP02090369A Division EP1306868B1 (en) 1998-02-25 1999-02-05 High voltage power circuit breaker with insulating nozzle

Publications (1)

Publication Number Publication Date
EP1064664A1 true EP1064664A1 (en) 2001-01-03

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EP02090369A Revoked EP1306868B1 (en) 1998-02-25 1999-02-05 High voltage power circuit breaker with insulating nozzle
EP99915472A Withdrawn EP1064664A1 (en) 1998-02-25 1999-02-05 High voltage power circuit breaker with an insulation nozzle

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EP02090369A Revoked EP1306868B1 (en) 1998-02-25 1999-02-05 High voltage power circuit breaker with insulating nozzle

Country Status (6)

Country Link
US (1) US6744000B1 (en)
EP (2) EP1306868B1 (en)
JP (1) JP2002505501A (en)
CA (1) CA2321714A1 (en)
DE (2) DE19809088C1 (en)
WO (1) WO1999044213A1 (en)

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FR2869449B1 (en) * 2004-04-21 2008-02-29 Areva T & D Sa ELECTRIC CUTTING EQUIPMENT IN MEDIUM OR HIGH VOLTAGE.
EP2099047B1 (en) 2008-03-03 2012-10-03 ABB Research Ltd Combustion contact device and output switch
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JP5242461B2 (en) * 2009-03-06 2013-07-24 株式会社東芝 Gas circuit breaker
FR2944136B1 (en) * 2009-04-03 2011-06-10 Areva T & D Sa ARC-BLOW MOBILE CONTACT CURRENT CHAMBER MADE INTEGRALLY THROUGH THE SAME, BY HVDC BY-PASS SWITCH AND UNDER HVDC CONVERSION STATION COMPRISING SUCH A ROOM.
JP5422472B2 (en) * 2010-04-08 2014-02-19 株式会社東芝 Gas circuit breaker
RU2483407C1 (en) * 2011-10-11 2013-05-27 Открытое Акционерное Общество Холдинговая Компания "Электрозавод" (Оао "Электрозавод") Grounding conductor for sf6 insulated switchgear
KR200482939Y1 (en) * 2012-03-14 2017-03-17 엘에스산전 주식회사 Hybrid-extinction type gas circuit breaker
FR3053524B1 (en) * 2016-06-29 2018-08-10 General Electric Technology Gmbh ELECTRIC ARC BLOWING NOZZLE AND CIRCUIT BREAKER COMPRISING SUCH A NOZZLE
CN109716476B (en) * 2016-07-21 2020-06-26 Abb瑞士股份有限公司 Gas-insulated high-voltage switching device with improved main nozzle
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Also Published As

Publication number Publication date
JP2002505501A (en) 2002-02-19
DE19809088C1 (en) 1999-09-30
EP1306868A1 (en) 2003-05-02
EP1306868B1 (en) 2004-11-10
WO1999044213A1 (en) 1999-09-02
CA2321714A1 (en) 1999-09-02
DE59911061D1 (en) 2004-12-16
US6744000B1 (en) 2004-06-01

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