EP0069819B1 - Disjoncteur à gaz comprimé - Google Patents

Disjoncteur à gaz comprimé 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)
English (en)
Other versions
EP0069819A2 (fr
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/fr
Publication of EP0069819A3 publication Critical patent/EP0069819A3/de
Application granted granted Critical
Publication of EP0069819B1 publication Critical patent/EP0069819B1/fr
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.

Landscapes

  • Circuit Breakers (AREA)

Claims (4)

1. - Disjoncteur à gaz comprimé comportant un élément de contact (16) mobile pourvu d'un passage axial (15) et une buse soufflante (14) entourant ce contact et se déplaçant avec lui, laquelle, en position fermée, est fermée par un élément de contact fixe (11) en prise avec l'élément de contact mobile (16), et est reliée, du côté entrée, à une chambre de pompe (23) pouvant être mise sous pression lors d'une course de mise hors circuit, laquelle chambre, de son côté, est réalisée en forme de volume annulaire et est délimitée par un cylindre intérieur (21) portant l'élément de contact mobile (16) et entourant un conduit de soufflage (32), ainsi que par un cylindre extérieur (17) portant la buse soufflante, les deux cylindres (17, 21) pouvant être déplacés par l'intermédiaire d'un piston de pompe (24) annulaire soutenu in situ et étant reliés ensemble exclusivement à leurs extremités opposées à la buse soufflante (14), par un fond annulaire (22), dans lequel se trouvent au moins deux alésages (26) dans chacun desquels s'étend une colonne (27) ancrée in situ, soutenant le piston de pompe (24), caractérisé en ce que chaque alésage (26) est pourvu d'un contact à frottement électrique (31) qui entoure la colonne (27) électriquement conductrice, et le conduit de soufflage (32) est continu dans le sens axial et est traversé radialement par des éléments de fixation (33, 34) qui couplent le cylindre intérieur (21) à une tige d'entraînement (35).
2. - Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que les éléments de fixation (33, 34) comportent des nervures (33) s'étendant radialement du cylindre intérieur (21) vers l'intérieur et un moyeu (34) porté par les nervures, qui est fixé de son côté à la tige d'entraînement (35).
3. - Disjoncteur à gaz comprimé selon la revendication 2, caractérisé en ce que le cylindre extérieur (17), le fond annulaire (22), le cylindre intérieur (21), les nervures (33) et le moyeu (34) sont réalisés d'une seule pièce.
4. - Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que chaque colonne (27) comporte une gaine extérieure électriquement conductrice (29) qui est serrée entre le piston de pompe (24) et une pièce de raccordement fixe (28) au moyen d'un boulon d'assemblage (30).
EP82101369A 1981-07-09 1982-02-24 Disjoncteur à gaz comprimé Expired EP0069819B1 (fr)

Applications Claiming Priority (2)

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

Publications (3)

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

Family

ID=4277389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82101369A Expired EP0069819B1 (fr) 1981-07-09 1982-02-24 Disjoncteur à gaz comprimé

Country Status (4)

Country Link
US (1) US4431887A (fr)
EP (1) EP0069819B1 (fr)
JP (1) JPS5816417A (fr)
DE (1) DE3276205D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6299548A (ja) * 1985-10-25 1987-05-09 元旦ビユーティ工業株式会社 横葺き屋根
JPS63315756A (ja) * 1987-06-19 1988-12-23 元旦ビューティ工業株式会社 横葺き屋根
JPH0730603B2 (ja) * 1987-07-01 1995-04-10 元旦ビューティ工業 株式会社 横葺き用屋根材
JPS6410858A (en) * 1987-07-03 1989-01-13 Funaki Shoji Kk Transverse shingled roof
JPH0730601B2 (ja) * 1987-08-25 1995-04-10 元旦ビューティ工業株式会社 建造物の屋根葺替え方法
FR2800905B1 (fr) * 1999-11-08 2001-11-30 Alstom Interrupteur de centrale avec un echangeur-radiateur
FR2962847B1 (fr) * 2010-07-16 2012-08-17 Areva T & D Sas Appareillage de chambre de coupure pour deux electrodes de contact confinees

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732451B2 (fr) * 1974-01-16 1982-07-10
CH591756A5 (fr) * 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

Also Published As

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

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