EP0028039B2 - Disjoncteur à gaz comprimé - Google Patents

Disjoncteur à gaz comprimé Download PDF

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Publication number
EP0028039B2
EP0028039B2 EP80200920A EP80200920A EP0028039B2 EP 0028039 B2 EP0028039 B2 EP 0028039B2 EP 80200920 A EP80200920 A EP 80200920A EP 80200920 A EP80200920 A EP 80200920A EP 0028039 B2 EP0028039 B2 EP 0028039B2
Authority
EP
European Patent Office
Prior art keywords
contact
switching element
burn
movable
current
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
EP80200920A
Other languages
German (de)
English (en)
Other versions
EP0028039A1 (fr
EP0028039B1 (fr
Inventor
Guido Huser
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 EP0028039A1 publication Critical patent/EP0028039A1/fr
Application granted granted Critical
Publication of EP0028039B1 publication Critical patent/EP0028039B1/fr
Publication of EP0028039B2 publication Critical patent/EP0028039B2/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
    • H01H33/7015—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
    • 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
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • the present invention relates to a gas pressure switch according to the preamble of claim 1.
  • Such a switch is known, for example, from "Brown Boveri Mitt.”, 64, 1977 (11), p. 629, Figure 1.
  • an insulating nozzle and the blowing cylinder of the compression device are attached to the movable extinguishing current switch, which must be moved together with the movable extinguishing current switch during each switching operation.
  • the relatively large moving masses cause an undesirable contact bounce when switched on and delay the separation speed of the contacts when switched off.
  • a compressed gas switch with a fixed and a comparatively large mass, movable extinguishing current switching piece in which the erosion contact of the moving extinguishing current switching element inside this switching element is arranged displaceably in the direction of its movement and in the switched-on position both the erosion contact of the fixed one Extinguishing current contact contacted as well as under the action of a loaded spring.
  • the movable quenching current switch shows parts which act as contact elements and which are supported in the switched-on position on the fixed quenching current switch and in the switched-off position on the erosion contact of the movable quenching current switch. With this switch, the bouncing of the movable extinguishing current switching element is reduced when the spring-loaded erosion contact hits the fixed extinguishing current switching element when it is switched on.
  • a pressure gas switch known from DE-B 1 156143, in which a spring-loaded tube, which is arranged in a hollow movable contact piece and is displaceable in its direction of movement and acts as a burn-up contact, reduces the contact bounce by prior impact on a fixed contact piece, but not prevents the moving contact from subsequently colliding with the fixed contact.
  • the first part of the contact of the movable extinguishing current switching piece which is designed as a stroke contact, meets the contact of the fixed extinguishing current switching piece when switched on. Since the mass of this part is almost negligible compared to the masses of the movable extinguishing current switching element, the movable part of the compression device and the insulating nozzle, contact bounce is almost avoided.
  • the second part of the stroke contact which is rigidly connected to the carrier part of the extinguishing current switching element, "only serves to accommodate the base point of the switching arc, since this avoids unnecessary mechanical friction between the extinguishing contacts.
  • the compressed gas switch is not only extremely easy to repair, but is also characterized by the fact that the dynamic current forces that occur when switching on are almost complete be eliminated.
  • the figure shows a plan view of a longitudinal section through the circuit breaker according to the invention, this switch being shown in the left half of the figure when switched on and in the right half of the figure when switched off.
  • the numbers 10 and 11 denote power connections of the pressure gas switch.
  • a spring-mounted nominal current contact 20 is connected to the current connection 10 and, in the switched-on state, leads the nominal current to the current connection 11 via a movable nominal current contact 21, which is designed as a blowing cylinder of a compression device in the lower part.
  • a fixed, cylindrical extinguishing current switching piece 30 has a hollow carrier part 31 provided with openings 33 and a contact 32 attached to the end of the carrier part 31. With this fixed contact 32, a movable extinguishing current switching piece 40 is in front contact in the switched-on position.
  • the movable extinguishing current switching element 40 has a support part 41 provided with openings 43 and a stroke contact 42.
  • the stroke contact 42 has an axially displaceably arranged contact device in the interior of the carrier part 41, comprising a pressure ring 421 and contact finger 422, and an annular erosion ring 423 fastened to the end face of the carrier part 41 facing the fixed extinguishing current switching element 30.
  • the pressure ring 421 is provided with ball heads 424, which press the contact fingers 422 against the inner wall of the carrier part 41 under the action of a spring 50.
  • the inner diameter of the annular erosion ring 423 is larger than the outer diameter of the contact 32 of the fixed extinguishing current switching piece 30 and smaller than the outside diameter of the axially displaceably arranged contact device of the movable extinguishing current switching element 40.
  • a fixed blow piston which, like the nominal current contact 21 connected to the carrier part 41 of the movable extinguishing current switching element 40 via conductive connecting webs 61, belongs to a compression device for compressed gas.
  • This compressed gas is passed through a channel 71 and an annular nozzle opening to the arc drawn when switching off.
  • the channel 71 and the annular nozzle opening are formed by the movable extinguishing current switching element 40 and an insulating material nozzle 70 surrounding the extinguishing current switching element 40 at a distance.
  • the arc is blown by the compressed gas flow which begins after the extinguishing current switching elements 30, 40 have been separated via the channel 71 and the annular nozzle opening.
  • This compressed gas flow is particularly intensive in that the compressed gas was precompressed before the two extinguishing flow switching elements 30, 40 were separated. Since the contact fingers 422, like the contact 32, delimit a nozzle-shaped opening, the arc base points are blown particularly intensively via the hollow carrier parts 31, 41 and the openings 33, 43 before the pressure gas is removed.
  • the drive of the movable extinguishing current switching element 40 is supported by the loaded spring 50 acting in the switch-off direction, as a result of which a high separation speed of the extinguishing current switching elements 30, 40 is achieved.
  • the movable extinguishing current switching piece 40 When switched on, the movable extinguishing current switching piece 40 is moved in the opposite direction. A switch-on arc that may occur is drawn between the erosion ring 423 and the fixed contact 32. When the contact fingers 422 strike the contact 32, this arc disappears. Since the contact fingers 422 and the pressure ring 421 are the only parts which are braked here, and since these parts have only a very low mass compared to the mass of the other moving parts and are also under the action of the now tensioned spring 50, there is no need Contact bounces almost completely. The repulsive forces caused by the inrush current are overcome by the force of the tensioned spring 50. After completion of the switch-on process, the spring 50 is charged with potential energy, which is now available again for the switch-off process.

Landscapes

  • Circuit Breakers (AREA)

Claims (1)

  1. Disjoncteur à gaz comprimé comportant un porte-contact à courant d'extinction fixe (30) et un porte-contact à courant d'extinction cylindrique mobile (40), ces deux portes-contacts à courant d'extinction (30, 40) étant disposés coaxialement et étant engagés l'un dans l'autre, dans la position de fermeture des contacts, par leurs extrémités libres ayant la forme de contacts pare-étincelles (contact 32, anneau pare-étincelles 423), dans lequel les contacts pare-étincelles (contact 32, anneau pare-étincelles 423) sont reliés rigidement chaque fois à un élément de support (31, 41) et le porte-contact à courant d'extinction mobile (40) est tubulaire et est relié à une douille isolante (70) ainsi qu'à la partie mobile d'un dispositif de compression, caractérisé en ce que le diamètre intérieur du contact pare-étincelles (anneau pare-étincelles 423) du porte-contact à courant d'extinction mobile (40) est supérieur au diamètre extérieur du contact pare-étincelles (contact 32) du porte-contact à courant d'extinction fixe (30) et, dans l'élément de support (41) du porte-contact à courant d'extinction mobile (40), est contenu un dispositif de contact monté de manière à pouvoir coulisser dans le sens axial et, dans la position de fermeture des contacts, contactant le contact pare-étincelles (contact 32) du porte-contact à courant d'extinction fixe (30) et sollicité par un ressort chargé (50), le diamètre extérieur de ce dispositif de contact étant supérieur au diamètre intérieur du contact pare-étincelles (anneau pare-étincelles 423) du porte-contact à courant d'extinction mobile (40), le dispositif de contact comportant des doigts de contact (422) et un anneau de pression (421) pouvu de têtes rondes (424) et le ressort (50) étant disposé entre l'anneau de pression (421) et une butée de l'élément de support (41) ou du moyen d'entraînement du porte-contact à courant d'extinction mobile (40).
EP80200920A 1979-10-25 1980-10-01 Disjoncteur à gaz comprimé Expired EP0028039B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9576/79 1979-10-25
CH957679 1979-10-25

Publications (3)

Publication Number Publication Date
EP0028039A1 EP0028039A1 (fr) 1981-05-06
EP0028039B1 EP0028039B1 (fr) 1983-02-23
EP0028039B2 true EP0028039B2 (fr) 1986-12-10

Family

ID=4353435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200920A Expired EP0028039B2 (fr) 1979-10-25 1980-10-01 Disjoncteur à gaz comprimé

Country Status (4)

Country Link
US (1) US4371766A (fr)
EP (1) EP0028039B2 (fr)
CA (1) CA1137531A (fr)
DE (2) DE2946715A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426561A (en) 1982-01-19 1984-01-17 Westinghouse Electric Corp. Puffer-type compressed-gas circuit-interrupter
IT1196105B (it) * 1984-05-10 1988-11-10 Sace Spa Interruttore elettrico ad alta tensione con dispositivo di estinzione dell'arco mediante autogenerazione di pressione di un fluido di estinzione
EP0290950B1 (fr) * 1987-05-13 1993-04-14 BBC Brown Boveri AG Disjoncteur à gaz comprimé
US5059753A (en) * 1987-11-06 1991-10-22 Cooper Industries, Inc. SF6 puffer recloser
FR2647254B1 (fr) * 1989-05-19 1991-07-05 Alsthom Gec Disjoncteur a moyenne tension a courant nominal eleve
FR2809531B1 (fr) * 2000-05-25 2002-07-05 Alstom Buse isolante de soufflage pour disjoncteur
EP4664503A1 (fr) * 2024-06-12 2025-12-17 GE Vernova Technology GmbH Disjoncteur haute tension à contacts optimisés

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1105959B (de) * 1959-02-06 1961-05-04 Liebknecht Transformat Kontaktanordnung fuer elektrische Schalter, insbesondere Druckgasschalter
DE1191465B (de) * 1963-09-06 1965-04-22 Siemens Ag Elektrischer Schalter fuer grosse Einschaltstroeme
FR2273362A1 (en) * 1974-05-31 1975-12-26 Alsthom Cgee High voltage circuit breaker - has fixed contact with semi-mobile contact movable from mobile contact by spring
US4052577A (en) * 1975-09-02 1977-10-04 I-T-E Imperial Corporation Magnetically driven ring arc runner for circuit interrupter
DE2644421B2 (de) * 1976-09-30 1980-01-10 Siemens Ag, 1000 Berlin Und 8000 Muenchen Kontaktsystem für Hochspannungs-Leistungsschalter
US4229627A (en) * 1978-10-04 1980-10-21 Electric Power Research Institute, Inc. Gas puffer type current interrupter and method

Also Published As

Publication number Publication date
DE3062136D1 (en) 1983-03-31
EP0028039A1 (fr) 1981-05-06
CA1137531A (fr) 1982-12-14
DE2946715A1 (de) 1981-05-07
EP0028039B1 (fr) 1983-02-23
US4371766A (en) 1983-02-01

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