EP0069819B1 - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

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Publication number
EP0069819B1
EP0069819B1 EP82101369A EP82101369A EP0069819B1 EP 0069819 B1 EP0069819 B1 EP 0069819B1 EP 82101369 A EP82101369 A EP 82101369A EP 82101369 A EP82101369 A EP 82101369A EP 0069819 B1 EP0069819 B1 EP 0069819B1
Authority
EP
European Patent Office
Prior art keywords
contact piece
gas
blast
inner cylinder
movable
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.)
Expired
Application number
EP82101369A
Other languages
German (de)
French (fr)
Other versions
EP0069819A2 (en
EP0069819A3 (en
Inventor
Christian Dr. Sturzenegger
Willi Schütz
Bruno Aeschbach
Heinz Aeschbach
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.)
General Electric Switzerland GmbH
Original Assignee
Sprecher Energie 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
Application filed by Sprecher Energie AG filed Critical Sprecher Energie AG
Publication of EP0069819A2 publication Critical patent/EP0069819A2/en
Publication of EP0069819A3 publication Critical patent/EP0069819A3/en
Application granted granted Critical
Publication of EP0069819B1 publication Critical patent/EP0069819B1/en
Expired legal-status Critical Current

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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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H2033/888—Deflection of hot gasses and arcing products

Definitions

  • the invention relates to a gas pressure switch of the type mentioned in the preamble of claim 1.
  • Such a pressure gas switch is known from GB-A-2034 121.
  • that end region of the outer cylinder which carries the blowing nozzle also serves as a movable nominal current contact.
  • a ring of resilient contact fingers surrounding the outer cylinder is provided. This ring essentially determines the space required transversely to the switch axis of the active switch components within the switch housing. If you consider that such switches strive to make the volume of the pump room as large as possible in the switch-on position in order to have as much extinguishing gas available without, however, increasing the switching stroke and thus the pump stroke and, with it, the required drive power, this endeavor can among other things, taking into account increasing the diameter of the outer cylinder. Because in the known switch this outer cylinder is still surrounded by the contact finger ring, this would result in an even larger space requirement in the switch housing, measured transversely to the switch axis.
  • the axial passage in the movable contact piece of the known switch has the form of a blind bore, from the bottom of which radial passages emerge, which open out into a blow-out space which is arranged on the side of the pump piston facing away from the pump space.
  • the object of the invention is to design a gas pressure switch of the type mentioned at the outset in such a way that the volume of the pump chamber can be made as large as possible without increasing the space required in the switch housing transversely to the switch axis Extinguishing gas discharged from the pump chamber can flow as freely as possible through the axial passage in the movable contact piece after blowing the switching arc.
  • the proposed pressure gas switch has the features specified in the characterizing part of patent claim 1. On the one hand, this means that the current is no longer drawn from the outer diameter of the outer cylinder, and on the other hand, the switching gases (after blowing the switching arc) can flow out in a substantially straight line.
  • a set of 10 fixed contact pieces is arranged in an encapsulated switch housing (not shown) containing an extinguishing gas, for example SF 6 .
  • This set 10 has a fixed, in the present example tubular tear-off contact piece 11, which is surrounded by a coaxial, tubular power contact piece 13 provided with contact fingers 12 at its free end.
  • the tear-off contact piece 11 closes a blowing nozzle 14 made of an electrical insulating material and engages in a movable tear-off contact piece 16 provided with an axial passage 15.
  • the blow nozzle 14 is attached to an outer, electrically conductive cylinder 17 at its inlet end.
  • a shoulder 18 is formed approximately halfway up the outer lateral surface of the outer cylinder 17, on which a movable power contact piece 20 surrounding the outer cylinder 17 is screwed by means of bolts 19.
  • this power contact piece 20 engages over the inlet end of the blowing nozzle 14 and thus clamps it on the upper end face of the outer cylinder 17.
  • the contact piece 20 cooperates with the contact fingers 12 in the switched-on position.
  • the movable tear-off contact piece 16 is in a manner not shown, e.g. by screwing, attached to the upper end face of an inner cylinder 21 which is coaxial with the outer cylinder 17.
  • the two cylinders 21 and 17 thus delimit in the radial direction a jacket chamber-shaped pump chamber 23, in which an annular pump piston 24 sealing against the cylinders 17 and 21 is arranged, via which the two cylinders 17 and 21 can be displaced.
  • the inner and outer cylinders 21 and 17 are exclusively connected to one another at their ends facing away from the contact piece 16 or the blowing nozzle 14 by an essentially annular bottom 22.
  • three bushings 25 are formed on this floor 22, which are distributed at uniform angular intervals.
  • Each of the bushings 25 has a continuous guide bore 26 (see also FIG. 2). Through each guide bore 26 leads one at the top Pump piston 24 anchored column 27.
  • Each column 27 has a sleeve 29 made of an electrically conductive material which is supported on one end on the side of the pump piston 24 facing away from the pump chamber 23 and on the other side on a conductive, fixedly arranged connecting part 28, which sleeve 29 by means of a tension bolt passing through it 30 is clamped between the connecting part 28 and the pump piston 24.
  • Each guide bore 26 is provided with a sliding contact 31 engaging on the outside of the sleeve 29, so that a perfect electrical connection between the connecting part 28 on the one hand and the contact piece 16 (via the cylinder 21) and the contact piece 20 (via the cylinder 17) on the other hand is guaranteed.
  • In the bottom 22 there are also a number of ventilation holes 37 which, during a switch-off stroke, prevent the formation of a vacuum which inhibits the lifting movement on the side of the pump piston 24 facing away from the pump chamber 23.
  • the cylinder 21 encloses a blow-out channel 32 starting from the axial passage 15 in the contact piece 16.
  • a plurality of support ribs 33 are formed on the inside of the inner cylinder 21, which extend radially inward through the blow-out channel 32 and are connected to a hub-shaped fastening part 34 which is in turn attached to the end of a drive rod 35.
  • the drive rod 35 is slidably guided through a central bore 36 in the connecting part 28 and coupled to a switch drive, not shown.
  • the advantages of the switch described are obvious.
  • the extinguishing gas displaced or expelled from the pump chamber 23 by the pump piston 24 during a switch-off stroke can reach the blow nozzle 14 in undisturbed flow and blow here the switching arcs 11 and 16 burning between the tear-off contact pieces 11 and 16 that disengage after the power contact pieces 13, 20.
  • the guiding of the movable switch parts is guaranteed by the several support columns 27 h - as if this were done on a central tube supporting the pump piston and receiving the drive rod.
  • that part of the heated extinguishing gases which escapes through the axial passage 15 has a larger outflow cross section, namely the outflow channel 32, which results in a faster cooling of the heated extinguishing gases.

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  • Circuit Breakers (AREA)

Description

Die Erfindung betrifft einen Druckgasschalter der im Oberbegriff des Patentanspruches 1 genannten Art.The invention relates to a gas pressure switch of the type mentioned in the preamble of claim 1.

Ein solcher Druckgasschalter ist aus der GB-A-2034 121 bekannt. Bei dem bekannten Schalter dient jener Endbereich des äusseren Zylinders, der die Blasdüse trägt, zugleich als beweglicher Nennstromkontakt. Um von diesem äusseren Zylinder den Strom abzunehmen, ist ein Kranz von den äusseren Zylinder umgebenden, federnden Kontaktfinger vorgesehen. Dieser Kranz bestimmt im wesentlichen den quer zur Schalterachse erforderlichen Raumbedarf der aktiven Schalterbestandteile innerhalb des Schaltergehäuses. Bedenkt man, dass man bei solchen Schaltern bestrebt ist, den Rauminhalt des Pumpraumes in Einschaltstellung möglichst gross zu gestalten, um möglichst viel Löschgas verfügbar zu haben, ohne indessen den Schalthub und damit den Pumphub und mit diesem die erforderliche Antriebsleistung zu vergrössern, kann dieser Bestrebung unter anderen Dingen dadurch Rechnung getragen werden, den Durchmesser des äusseren Zylinders zu vergrössern. Weil beim bekannten Schalter dieser äussere Zylinder noch vom Kontaktfingerkranz umgeben ist, ergäbe sich ein noch grösserer, quer zur Schalterachse gemessener Raumbedarf im Schaltergehäuse.Such a pressure gas switch is known from GB-A-2034 121. In the known switch, that end region of the outer cylinder which carries the blowing nozzle also serves as a movable nominal current contact. In order to draw the current from this outer cylinder, a ring of resilient contact fingers surrounding the outer cylinder is provided. This ring essentially determines the space required transversely to the switch axis of the active switch components within the switch housing. If you consider that such switches strive to make the volume of the pump room as large as possible in the switch-on position in order to have as much extinguishing gas available without, however, increasing the switching stroke and thus the pump stroke and, with it, the required drive power, this endeavor can among other things, taking into account increasing the diameter of the outer cylinder. Because in the known switch this outer cylinder is still surrounded by the contact finger ring, this would result in an even larger space requirement in the switch housing, measured transversely to the switch axis.

Ausserdem hat der axiale Durchlass im beweglichen Kontaktstück des bekannten Schalters die Form einer Sackbohrung, von deren Boden radiale Durchlässe ausgehen, die in einen Ausblasraum ausmünden, der auf der dem Pumpraum abgekehrten Seite des Pumpkolbens angeordnet ist. Diese Ausbildung hemmt das Abströmen der Schaltgase durch das bewegliche Kontaktstück hindurch, namentlich in jener Phase eines Ausschalthubes, in der das bewegliche Kontakstück sich bereits vom festen Kontaktstück getrennt hat, dieses aber die Blasdüse noch verschlossen hält.In addition, the axial passage in the movable contact piece of the known switch has the form of a blind bore, from the bottom of which radial passages emerge, which open out into a blow-out space which is arranged on the side of the pump piston facing away from the pump space. This design inhibits the outflow of the switching gases through the movable contact piece, especially in that phase of a switch-off stroke in which the movable contact piece has already separated from the fixed contact piece, but which still keeps the blowing nozzle closed.

Bei diesem Stand der Technik ist die Aufgabe der Erfindung, einen Druckgasschalter der eingangs genannten Art derart auszubilden, dass der Rauminhalt des Pumpraumes möglichst gross gestaltet werden kann, ohne den quer zur Schalterachse erforderlichen Raumbedarf im Schaltergehäuse zu vergrössern, wobei das bei einem Ausschalthub aus dem Pumpraum ausgestossene Löschgas nach Beblasung des Schaltlichbogens möglichst unbehindert durch den axialen Durchlass im beweglichen Kontaktstück abfliessen kann.In this prior art, the object of the invention is to design a gas pressure switch of the type mentioned at the outset in such a way that the volume of the pump chamber can be made as large as possible without increasing the space required in the switch housing transversely to the switch axis Extinguishing gas discharged from the pump chamber can flow as freely as possible through the axial passage in the movable contact piece after blowing the switching arc.

Diese Aufgabe ist gemäss der Erfindung dadurch gelöst, dass der vorgeschlagene Druckgasschalter die im Kennzeichen des Patentanspruches 1 angegebenen Merkmale aufweist. Dadurch erfolgt einerseits die Stromabnahme nicht mehr vom äusseren Durchmesser des äusseren Zylinders und andererseits können die Schaltgase (nach Beblasung des Schaltlichtbogens) im wesentlichen geradlinig abströmen.This object is achieved according to the invention in that the proposed pressure gas switch has the features specified in the characterizing part of patent claim 1. On the one hand, this means that the current is no longer drawn from the outer diameter of the outer cylinder, and on the other hand, the switching gases (after blowing the switching arc) can flow out in a substantially straight line.

Ausgestaltungen der Erfindung sind in den abhängigen Ansprüchen angegeben.Embodiments of the invention are specified in the dependent claims.

Die Erfindung ist nachstehend anhand der Zeichnung rein beispielsweise näher beschrieben. Es zeigt:

  • Fig. 1 einen schematischen Axialschnitt durch die im vorliegenden Zusammenhang wesentlichen Bestandteile eines Druckgasschalters, links in Einschalt-, rechts in . Ausschaltstellung, und
  • Fig. 2 einen Schnitt gemäss der Linie 11 - II der Fig. 1 (in Einschaltstellung).
The invention is described below purely by way of example with reference to the drawing. It shows:
  • Fig. 1 shows a schematic axial section through the essential components in the present context of a pressure gas switch, left in the on, right in. Off position, and
  • Fig. 2 shows a section along the line 11 - II of Fig. 1 (in the on position).

In einem nicht dargestellten, gekapselten, ein Löschgas, beispielsweise SF6 enthaltenden Schaltergehäuse ist ein Satz 10 fester Kontaktstücke angeordnet. Dieser Satz 10 weist ein festes, im vorliegenden Beispiel rohrförmiges Abreisskontaktstück 11 auf, das von einem koaxialen, rohrförmigen, an seinem freien Ende mit Kontaktfingern 12 versehenen Leistungskontaktstück 13 umgeben ist. In Einschaltstellung (Fig. 1 links) verschliesst das Abreisskontaktstück 11 eine Blasdüse 14 aus einem elektrischen Isoliermaterial und greift in ein mit einem axialen Durchlass 15 versehenes, bewegliches Abreiss-Kontaktstück 16.A set of 10 fixed contact pieces is arranged in an encapsulated switch housing (not shown) containing an extinguishing gas, for example SF 6 . This set 10 has a fixed, in the present example tubular tear-off contact piece 11, which is surrounded by a coaxial, tubular power contact piece 13 provided with contact fingers 12 at its free end. In the switched-on position (FIG. 1 on the left), the tear-off contact piece 11 closes a blowing nozzle 14 made of an electrical insulating material and engages in a movable tear-off contact piece 16 provided with an axial passage 15.

Die Blasdüse 14 ist an ihrem einlasseitigen Ende an einem äusseren, elektrisch leitenden Zylinder 17 befestigt. Zu diesem Zweck ist etwa auf halber Höhe der äusseren Mantelfläche des äusseren Zylinders 17 eine Schulter 18 angeformt, auf der mittels Bolzen 19 ein den äusseren Zylinder 17 umgebendes, bewegliches Leistungskontaktstück 20 festgeschraubt ist. Dieses Leistungskontaktstück 20 übergreift in der Art einer Überwurfmutter das einlasseitige Ende der Blasdüse 14 und klemmt diese somit auf der oberen Stirnseite des äusseren Zylinders 17 fest. Ebenso wirkt das Kontaktstück 20 in Einschaltstellung mit den Kontaktfingern 12 zusammen.The blow nozzle 14 is attached to an outer, electrically conductive cylinder 17 at its inlet end. For this purpose, a shoulder 18 is formed approximately halfway up the outer lateral surface of the outer cylinder 17, on which a movable power contact piece 20 surrounding the outer cylinder 17 is screwed by means of bolts 19. In the manner of a union nut, this power contact piece 20 engages over the inlet end of the blowing nozzle 14 and thus clamps it on the upper end face of the outer cylinder 17. Likewise, the contact piece 20 cooperates with the contact fingers 12 in the switched-on position.

Das bewegliche Abreisskontaktstück 16 ist auf nicht näher dargestellte Weise, z.B. durch Verschraubung, an der oberen Stirnseite eines inneren Zylinders 21 befestigt, der koaxial zum äusseren Zylinder 17 ist. Die beiden Zylinder 21 und 17 begrenzen somit in radialer Richtung einen mantelraumförmigen Pumpraum 23, in dem ein ringförmiger, gegen die Zylinder 17 und 21 abdichtender Pumpkolben 24 angeordnet ist, über welchen die beiden Zylinder 17 und 21 verschiebbar sind.The movable tear-off contact piece 16 is in a manner not shown, e.g. by screwing, attached to the upper end face of an inner cylinder 21 which is coaxial with the outer cylinder 17. The two cylinders 21 and 17 thus delimit in the radial direction a jacket chamber-shaped pump chamber 23, in which an annular pump piston 24 sealing against the cylinders 17 and 21 is arranged, via which the two cylinders 17 and 21 can be displaced.

Der innere und der äussere Zylinder 21 bzw. 17 sind ausschliesslich an ihren dem Kontaktstück 16 bzw. der Blasdüse 14 abgekehrten Enden durch einen im wesentlichen ringförmigen Boden 22 miteinander verbunden. An diesem Boden 22 sind - beim vorliegenden Beispiel deren drei Durchführungsstutzen 25 angeformt, die in gleichmässigen Winkelabständen verteilt sind. Jeder der Durchführungsstutzen 25 weist eine durchgehende Führungsbohrung 26 auf (vergleiche auch Fig. 2). Durch jede Führungsbohrung 26 führt eine obernends am Pumpkolben 24 verankerte Säule 27. Jede Säule 27 weist eine einerends an der dem Pumpraum 23 abgekehrten Seite des Pumpkolbens 24 und andernends an einem leitenden, ortsfest angeordneten Anschlussteil 28 abgestütze Hülse 29 aus einem elektrisch leitenden Material auf, welche Hülse 29 mittels eines diese durchsetzenden Zugbolzens 30 zwischen dem Anschlussteil 28 und dem Pumpkolben 24 verspannt ist. Jede Führungsbohrung 26 ist mit einem an der Aussenseite der Hülse 29 angreifenden Schleifkontakt 31 versehen, so dass eine einwandfreie, elektrische Verbindung zwischen dem Anschlussteil 28 einerseits und dem Kontaktstück 16 (über den Zylinder 21) sowie dem Kontaktstück 20 (über den Zylinder 17) andererseits gewährleistet ist. Im Boden 22 sind ausserdem eine Anzahl Lüftungslöcher 37 vorhanden, die bei einem Ausschalthub die Bildung eines die Hubbewegung hemmenden Vakuums auf der dem Pumpraum 23 abgekehrten Seite des Pumpkolbens 24 verhindern.The inner and outer cylinders 21 and 17 are exclusively connected to one another at their ends facing away from the contact piece 16 or the blowing nozzle 14 by an essentially annular bottom 22. In the present example, three bushings 25 are formed on this floor 22, which are distributed at uniform angular intervals. Each of the bushings 25 has a continuous guide bore 26 (see also FIG. 2). Through each guide bore 26 leads one at the top Pump piston 24 anchored column 27. Each column 27 has a sleeve 29 made of an electrically conductive material which is supported on one end on the side of the pump piston 24 facing away from the pump chamber 23 and on the other side on a conductive, fixedly arranged connecting part 28, which sleeve 29 by means of a tension bolt passing through it 30 is clamped between the connecting part 28 and the pump piston 24. Each guide bore 26 is provided with a sliding contact 31 engaging on the outside of the sleeve 29, so that a perfect electrical connection between the connecting part 28 on the one hand and the contact piece 16 (via the cylinder 21) and the contact piece 20 (via the cylinder 17) on the other hand is guaranteed. In the bottom 22 there are also a number of ventilation holes 37 which, during a switch-off stroke, prevent the formation of a vacuum which inhibits the lifting movement on the side of the pump piston 24 facing away from the pump chamber 23.

Der Zylinder 21 umschliesst einen von dem axialen Durchlass 15 im Kontaktstück 16 ausgehenden Ausblaskanal 32. An der Innenseite des inneren Zylinders 21 sind mehrere Tragrippen 33 angeformt, die sich radial nach innen durch den Ausblaskanal 32 erstrecken und mit einem nabenförmigen Befestigungsteil 34 verbunden sind, das seinerseits am Ende einer Antriebstange 35 befestigt ist. Die Antriebsstange 35 ist verschiebbar durch eine zentrale Bohrung 36 im Anschlussteil 28 geführt und an einen nicht dargestellten Schalterantrieb gekoppelt.The cylinder 21 encloses a blow-out channel 32 starting from the axial passage 15 in the contact piece 16. A plurality of support ribs 33 are formed on the inside of the inner cylinder 21, which extend radially inward through the blow-out channel 32 and are connected to a hub-shaped fastening part 34 which is in turn attached to the end of a drive rod 35. The drive rod 35 is slidably guided through a central bore 36 in the connecting part 28 and coupled to a switch drive, not shown.

Die Vorteile des beschriebenen Schalters sind evident. Das bei einem Ausschalthub durch den Pumpkolben 24 aus dem Pumpraum 23 verdrängte oder ausgestossene Löschgas kann in ungestörter Strömung in die Blasdüse 14 gelangen und hier den zwischen den nach den Leistungskontaktstücken 13,20 ausser Eingriff gelangenden Abreisskontaktstücken 11 und 16 brennenden Schaltlichtbogen beblasen. Beim beschriebenen Schalter ist es ausserdem möglich, den äusseren Zylinder 17, den Boden 22, den inneren Zylinder 21, die Tragrippen 33 und das Befestigungsstück 34 als ein einziges Metall-Guss-Stück herzustellen, was die Herstellungskosten erheblich vermindert. Schliesslich ist die Führung der beweglichen Schalterteile durch die mehreren Stützsäulen 27 h- -sser gewährleistet, als wenn dies an einem zentralen, den Pumpkolben abstützenden und die Antriebsstange aufnehmenden Rohr geschehen würde. Schliesslich steht jenem Teil der erhitzten Löschgase, der durch den axialen Durchlass 15 entweicht, ein grösserer Abströmquerschnitt, nämlich der Abströmkanal 32, zur Verfügung, was eine raschere Abkühlung der erhitzten Löschgase zur Folge hat.The advantages of the switch described are obvious. The extinguishing gas displaced or expelled from the pump chamber 23 by the pump piston 24 during a switch-off stroke can reach the blow nozzle 14 in undisturbed flow and blow here the switching arcs 11 and 16 burning between the tear-off contact pieces 11 and 16 that disengage after the power contact pieces 13, 20. In the switch described, it is also possible to produce the outer cylinder 17, the bottom 22, the inner cylinder 21, the support ribs 33 and the fastening piece 34 as a single metal casting, which considerably reduces the manufacturing costs. Finally, the guiding of the movable switch parts is guaranteed by the several support columns 27 h - as if this were done on a central tube supporting the pump piston and receiving the drive rod. Finally, that part of the heated extinguishing gases which escapes through the axial passage 15 has a larger outflow cross section, namely the outflow channel 32, which results in a faster cooling of the heated extinguishing gases.

Claims (4)

1. Gas-blast switch having a movable contact piece (16) with an axial passageway (15) and a blast nozzle (14) surrounding the movable contact piece (16) and movable therewith, the blast nozzle (14) in the closed position of the switch being closed by a fixed contact piece (11) in engagement with the movable contact piece (16) and having its inlet side connected to a pump space (23), which, during an opening stroke, is being pressurized, the pump space (23) having the shape of a jacket space delimited by an inner cylinder (21) carrying the movable contact piece (16) and enclosing an exhaust channel (32) and by an outer cylinder (17) carrying the blast nozzle (14), both cylinders (17, 21) being movable with respect to a stationarily supported, annular pump piston (24) and being mutually connected exclusively at their ends remote from the blast nozzle (14) by means of an annular bottom (22), in which there are provided at least two bores (26), through each of which a stationarily supported column (27) supporting the pump piston (24) extends, characterized in that each of the bores (26) is provided with an electrical slide contact (31) surrounding the electrically conductive column (27), and that the exhaust channel (32) is an axially through channel which is radially traversed by fastening elements (33, 34) which connect the inner cylinder (21) to a driving rod (35).
2. Gas-blast switch according to claim 1, characterized in that the fastening elements (33, 34) comprise spokes (33) extending radially inwardly from the inner cylinder (21) and a hub (34) carried by the spokes (33) and secured to the driving rod (35).
3. Gas-blast switch according to claim 2, characterized in that the outer cylinder (17), the annular bottom (22), the inner cylinder (21), the spokes (33) and the hub (34) are integrally formed as one piece.
4. Gas-blast switch according to claim 1, characterized in that each column (27) comprises an electrically conductive outer sleeve (29) which is fixed by means of a set bolt (30) between the pump piston (24) and a stationary connecting piece (28).
EP82101369A 1981-07-09 1982-02-24 Gas blast circuit breaker Expired EP0069819B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4507/81 1981-07-09
CH450781 1981-07-09

Publications (3)

Publication Number Publication Date
EP0069819A2 EP0069819A2 (en) 1983-01-19
EP0069819A3 EP0069819A3 (en) 1985-01-30
EP0069819B1 true EP0069819B1 (en) 1987-04-29

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EP82101369A Expired EP0069819B1 (en) 1981-07-09 1982-02-24 Gas blast circuit breaker

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US (1) US4431887A (en)
EP (1) EP0069819B1 (en)
JP (1) JPS5816417A (en)
DE (1) DE3276205D1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6299548A (en) * 1985-10-25 1987-05-09 元旦ビユーティ工業株式会社 Transverse shingled roof structure
JPS63315756A (en) * 1987-06-19 1988-12-23 元旦ビューティ工業株式会社 Transverse shingled roof
JPH0730603B2 (en) * 1987-07-01 1995-04-10 元旦ビューティ工業 株式会社 Roofing material for side roofing
JPS6410858A (en) * 1987-07-03 1989-01-13 Funaki Shoji Kk Transverse shingled roof
JPH0730601B2 (en) * 1987-08-25 1995-04-10 元旦ビューティ工業株式会社 How to change the roof of a building
FR2800905B1 (en) * 1999-11-08 2001-11-30 Alstom CENTRAL SWITCH WITH A RADIATOR-EXCHANGER
FR2962847B1 (en) * 2010-07-16 2012-08-17 Areva T & D Sas CUTTING CHAMBER EQUIPMENT FOR TWO CONFINED CONTACT ELECTRODES

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732451B2 (en) * 1974-01-16 1982-07-10
CH591756A5 (en) * 1975-06-18 1977-09-30 Bbc Brown Boveri & Cie
JPS53873A (en) * 1976-06-23 1978-01-07 Mitsubishi Electric Corp Fluid blowwout breaker
US4139753A (en) * 1976-09-21 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit-interrupter having improved separable contact structure
US4276456A (en) * 1978-10-23 1981-06-30 Westinghouse Electric Corp. Double-flow puffer-type compressed-gas circuit-interrupter
CH645754A5 (en) * 1979-06-14 1984-10-15 Sprecher & Schuh Ag Gas-blast circuit breaker

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Publication number Publication date
US4431887A (en) 1984-02-14
EP0069819A2 (en) 1983-01-19
DE3276205D1 (en) 1987-06-04
EP0069819A3 (en) 1985-01-30
JPS5816417A (en) 1983-01-31

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