EP0290950B1 - Disjoncteur à gaz comprimé - Google Patents

Disjoncteur à gaz comprimé Download PDF

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Publication number
EP0290950B1
EP0290950B1 EP88107191A EP88107191A EP0290950B1 EP 0290950 B1 EP0290950 B1 EP 0290950B1 EP 88107191 A EP88107191 A EP 88107191A EP 88107191 A EP88107191 A EP 88107191A EP 0290950 B1 EP0290950 B1 EP 0290950B1
Authority
EP
European Patent Office
Prior art keywords
contact
nozzle
gas
switched
compressed
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 - Lifetime
Application number
EP88107191A
Other languages
German (de)
English (en)
Other versions
EP0290950A1 (fr
Inventor
Ulrich Dr. Ackermann
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Publication of EP0290950A1 publication Critical patent/EP0290950A1/fr
Application granted granted Critical
Publication of EP0290950B1 publication Critical patent/EP0290950B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/98—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 is based on a compressed gas switch with two contact pieces which can be brought into or out of engagement with one another along an axis, a first of which is designed as a nozzle and has spring-mounted contact fingers on a tubular contact carrier, with an insulating nozzle and with a heating volume for storing switching arcs generated Compressed gas, in which a second of the two contact pieces is passed through the constriction of the insulating nozzle in the switched-on state and is inserted into the first contact piece with a free end to form a contact force with the contact fingers, and in which compressed gas is switched off by the heating volume through the insulating nozzle and the first one when switching off Contact piece flows into an exhaust space.
  • the invention relates to a prior art of gas pressure switches, such as is described in DE-A1-34 25 633.
  • pressure gas when switching off during the high current phase, pressure gas is generated using the switching arc and in a heating volume saved.
  • the stored compressed gas extracts energy from the switching arc by means of axial blowing and thus extinguishes it.
  • a considerable part of the compressed gas stored in the heating volume can be discharged through a switching piece designed as a nozzle into the exhaust area of the switch before the zero current. The larger the cross section of the nozzle, the greater the proportion of compressed gas removed from the heating volume.
  • the known gas pressure switch in the embodiment according to FIG. 3 has a further constriction downstream of the nozzle constriction of the nozzle-shaped switching element. This further constriction closes off a volume limited by the upstream part of the switching element, which supports the heating power of the switching arc when switched off and causes an increase in pressure in the heating volume.
  • a compressed gas switch in which the compressed gas used to extinguish a switching arc is generated in a piston-cylinder compression device.
  • a fixed contact piece serves as both a nominal and an extinguishing current contact.
  • a movable nominal current contact works together with a section of this contact piece serving as nominal current contact.
  • a section of this contact piece serving as an extinguishing current contact works together with a nozzle-shaped auxiliary contact which can be axially displaced in the nominal current contact under the action of a spring, and a pin-shaped extinguishing current contact.
  • the invention solves the problem of specifying a pressure gas switch which is characterized by a high pressure build-up in the heating volume and a large thermal extinguishing capacity.
  • the compressed gas switch according to the invention is distinguished by a large short-circuit current carrying capacity and a high thermal extinguishing capacity.
  • this is due to the fact that large short-circuit currents can be conducted because of the suitably constructed switching element which acts as an extinguishing nozzle and at the same time an outflow of the compressed gas generated by the switching arc the exhaust area is largely avoided.
  • this is also due to the fact that when the current to be switched off approaches a zero crossing, the switching element, which acts as an extinguishing nozzle, exhibits optimal fluidic behavior.
  • FIG. 1 there is a fixed contact 1 with a nominal current contact 2 and a fully cylindrical, erosion-proof contact 3 and a contact 4 movable along an axis by a drive (not shown) in a filled with an arc-quenching insulating gas, housing, not shown.
  • the contact piece 4 has at its end facing the contact piece 1 an insulating nozzle 5 consisting of polytetrafluoroethylene with a constriction 6.
  • an annular channel 7 which connects the constriction 6 with an annular heating volume 8 which extends radially outwards through a for carrying a nominal current contact 9, tubular nominal current contact carrier 10 of the switching element 4 is limited.
  • the switching element 4 also has a tubular contact carrier 11, which is electrically conductively connected to the nominal current contact carrier 10 and is enclosed by the latter.
  • ring-shaped contact fingers 12 are resiliently attached.
  • the spring-mounted contact fingers 12 can be formed, for example, by axially made incisions in the contact carrier 11.
  • an axially displaceable, tubular body 13 is guided, the end of which faces the contact piece 1 is made of erosion-resistant material.
  • the tubular body 13 is in constant electrical connection with the contact carrier 11 via an annular sliding contact 14 and thus with a power connection (not shown) for the switching element 4.
  • the end of the tubular body 13 facing away from the switching element 1 is supported on a spring 15 which in turn rests on an annular extension 16 of the contact carrier 11 is mounted is.
  • the tubular body 13 and the tubular contact carrier 11 also each have a step-shaped extension 17 and 18, respectively.
  • the two switching elements 1 and 4 are in engagement with one another (right part of FIG. 1) and the current to be switched off flows predominantly in the nominal current path formed by the nominal current contacts 2, 9.
  • the erosion-resistant contact piece 3 is guided in an almost gas-tight manner through the constriction 6 of the insulating nozzle 5 and is inserted into the contact piece 4 with its free end.
  • the contact fingers 12 are resiliently supported on the lateral surface of the contact piece 3 with the formation of contact force, and the contact piece 3 has guided the tubular body 13 into the interior of the contact piece 4 while charging the spring 15.
  • the switching piece 4 When switching off, the switching piece 4 is guided downward by the drive (not shown) and the nominal current contacts 2, 9 first separate.
  • the current to be switched off is now predominantly commutated into a current path running from the contact piece 3 via the contact fingers 12 and the contact carrier 11.
  • the contact piece 3 and the contact fingers 12 separate. Since the tubular body 13, under the action of the loaded spring 15, is constantly supported here under the formation of contact pressure on the free end of the contact piece 3, the current to be switched off commutates into the extinguishing current path formed by the contact piece 3, the tubular body 13, the sliding contact 14 and the contact carrier 11.
  • the tubular body 13 and the contact piece 3 now separate and a switching arc is drawn between these two parts.
  • This switching arc heats up the surrounding insulating gas, which is fed into the heating volume 8 via the ring channel 7 and stored there.
  • the heating effect of the switching arc is greatly reduced and the compressed gas stored in the heating volume 8 now flows as in the left part 1 is shown by directional arrows through the now open constriction 6 of the insulating nozzle 5 and through a nozzle constriction 19 determined by the tubular body 13 into an exhaust space and thereby extinguishes the switching arc.
  • the switch according to the invention has the advantage on the one hand that the diameter of the nozzle constriction 19 can be freely selected. It is hereby achieved that the pressure loss during the formation of compressed gas as a result of heating by the switching arc before the zero current crossing can be kept extremely small despite the use of a contact piece 3 with a large diameter suitable for guiding large currents.
  • the switch according to the invention also has the advantage that it is possible by choosing a suitable distance h (right part of FIG. 1) between the two extensions 17 and 18, which determine the overtravel of the tubular body 13 when it is switched off, as the extinguishing nozzle bring acting tubular body 13 to a fluid mechanically optimal position.
  • the tubular body 13 forming a nozzle constriction 19 when switched off, in contrast to the pressure gas switch according to FIG. 1, is not driven by a spring, but by an arrangement containing a piston 20 and a cylinder 21, which is different from the one in FIG Switch off in the heating volume 8 stored compressed gas is actuated.
  • the piston 20 is designed as an annular piston directly connected to the tubular body 13. This annular piston slides in a gas-tight manner in the cylinder 21 delimited by the contact carrier 11 and a base 22.
  • this switch corresponds to the switch according to FIG. 1, but, in contrast to this, does not require a spring and can be easily adjusted to the pressure to be expected in the heating volume 8 when it is switched off, depending on the switch type, by suitable selection of the effective area of the piston 20 adjust the stored compressed gas.

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  • Circuit Breakers (AREA)

Claims (3)

  1. Disjoncteur à gaz comprimé, comprenant deux pièces de contact (1, 4) qui peuvent être mises en contact ou isolées l'une de l'autre le long d'un axe, ayant chacune l'un de deux plots de contact (3; 11, 12, 13) constituant, lors de la coupure, un trajet de courant d'extinction, dont le premier (11, 12, 13) a la forme d'une buse et présente des doigts de contact (12) montés élastiquement sur un support de contact (11) tubulaire, ayant une buse isolante (5) et un volume de chauffe (8) pour l'accumulation du gaz comprimé produit par l'arc électrique de commutation, pour lequel, à l'état d'enclenchement, le deuxième (3) des deux plots de contact (3; 11, 12, 13) passe par la portion étroite (6) de la buse isolante (5) et s'engage dans le premier plot de contact (11, 12, 13) par une extrémité libre en établissant une force de contact avec les doigts de contact (12), et pour lequel, lors de la coupure, du gaz comprimé provenant du volume de chauffe (8) s'écoule à travers la buse isolante (5) et le premier plot de contact (11, 12, 13) dans une chambre d'échappement, caractérisé en ce que les deux pièces de contact (1, 4) présentent chacune l'un de deux contacts (2, 9) de courant nominal qui constituent, à l'état d'enclenchement, un trajet de courant nominal, et en ce que le premier plot de contact (11, 12, 13) présente un corps tubulaire en matériau de contact, résistant à l'usure par arc électrique, qui peut être guidé en translation axiale dans un support de contact (11), et qui forme, sous l'effet d'un entraînement, à l'arrêt lors de la coupure, la partie étroite (19) de la buse du premier plot de contact (11, 12, 13).
  2. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que l'entraînement comprend un ressort (15) mis sous tension, lors de l'enclenchement par le deuxième plot de contact (3).
  3. Disjoncteur à gaz comprimé selon la revendication 1, caractérisé en ce que l'entraînement comprend un dispositif piston (20) - cylindre (21), qui est actionné lors de la coupure par le gaz comprimé accumulé.
EP88107191A 1987-05-13 1988-05-05 Disjoncteur à gaz comprimé Expired - Lifetime EP0290950B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH184087 1987-05-13
CH1840/87 1987-05-13

Publications (2)

Publication Number Publication Date
EP0290950A1 EP0290950A1 (fr) 1988-11-17
EP0290950B1 true EP0290950B1 (fr) 1993-04-14

Family

ID=4219829

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88107191A Expired - Lifetime EP0290950B1 (fr) 1987-05-13 1988-05-05 Disjoncteur à gaz comprimé

Country Status (4)

Country Link
US (1) US4798924A (fr)
EP (1) EP0290950B1 (fr)
JP (1) JPS63292538A (fr)
DE (1) DE3880190D1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3915700C3 (de) * 1989-05-13 1997-06-19 Aeg Energietechnik Gmbh Druckgasschalter mit Verdampfungskühlung
EP1675145A1 (fr) * 2004-12-23 2006-06-28 ABB Technology AG Disjoncteur à haute puissance avec joint contre les gaz d'arc
EP1675144A1 (fr) * 2004-12-23 2006-06-28 ABB Technology AG Disjoncteur à haute puissance avec conducteur pour les courants court-circuits résistant à des arcs électriques
DE102006034742A1 (de) * 2006-07-24 2008-01-31 Siemens Ag Isolierstoffdüse, welche ein erstes Material und ein zweites Material aufweist
SG145591A1 (en) * 2007-02-27 2008-09-29 Turbine Overhaul Services Pte System and method for electroplating metal components
DE102009009452A1 (de) 2009-02-13 2010-08-19 Siemens Aktiengesellschaft Schaltgeräteanordnung mit einer Schaltstrecke
FR2949170B1 (fr) * 2009-08-14 2011-11-25 Areva T & D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de manoeuvre reduite
JP6818604B2 (ja) * 2017-03-24 2021-01-20 株式会社日立製作所 ガス遮断器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3214541A (en) * 1961-04-03 1965-10-26 Westinghouse Electric Corp Fluid-blast circuit interrupter with straight-line driving mechanism
FR1541143A (fr) * 1966-09-01 1968-10-04 Bbc Brown Boveri & Cie Interrupteur à gaz comprimé
GB1525460A (en) * 1974-10-11 1978-09-20 Reyrolle Parsons Ltd High-voltage circuit-interrupters
JPS5856923B2 (ja) * 1976-06-10 1983-12-17 株式会社日立製作所 パツフア−形ガスしや断器
DE2946715A1 (de) * 1979-10-25 1981-05-07 BBC AG Brown, Boveri & Cie., Baden, Aargau Druckgasschalter
US4427862A (en) * 1982-11-08 1984-01-24 S&C Electric Company Contact assembly for a high-voltage circuit interrupter
DE3425633A1 (de) * 1984-06-07 1985-12-12 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Druckgasschalter
JPH0797464B2 (ja) * 1985-01-10 1995-10-18 株式会社東芝 パツフア−形ガス遮断器

Also Published As

Publication number Publication date
US4798924A (en) 1989-01-17
JPS63292538A (ja) 1988-11-29
EP0290950A1 (fr) 1988-11-17
DE3880190D1 (de) 1993-05-19

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