EP0524088A1 - Contact pour disjoncteur - Google Patents

Contact pour disjoncteur Download PDF

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Publication number
EP0524088A1
EP0524088A1 EP92402039A EP92402039A EP0524088A1 EP 0524088 A1 EP0524088 A1 EP 0524088A1 EP 92402039 A EP92402039 A EP 92402039A EP 92402039 A EP92402039 A EP 92402039A EP 0524088 A1 EP0524088 A1 EP 0524088A1
Authority
EP
European Patent Office
Prior art keywords
blowing
nozzle
circuit breaker
contact
tube
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Withdrawn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
EP92402039A
Other languages
German (de)
English (en)
French (fr)
Inventor
Denis Dufournet
Michel Perret
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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 GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0524088A1 publication Critical patent/EP0524088A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/76—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor

Definitions

  • the present invention relates to an electrical contact which can be used to constitute the arcing contact of a medium or high voltage circuit breaker.
  • blowing volume the heat produced by the arc which is established at the separation of the arcing contacts is used to heat the gas to a volume called blowing volume or expansion volume.
  • This volume is delimited at one end by a blowing nozzle; when the current to be cut through crosses zero, the gas in the blowing volume expands through the neck of the nozzle and blows the arc.
  • An object of the present invention is to improve the contact so as to obtain a greater pressure in the blowing volume, in particular for breaking low-intensity currents.
  • the contact of the invention which can be used as a movable arcing contact in a self-blowing circuit breaker comprising a blowing volume and a blowing nozzle, and which is characterized in that it consists of a metal tube at the end of which is fixed a tip made of insulating material.
  • the tip of the invention should not be confused with the insulating part described in French patent application 2,389,219; in this document, an insulating part is placed inside the fixed arcing contact of a circuit breaker to allow the switching of the arc on an annular electrode integral with the fixed arcing contact.
  • the tip is placed at the end of the movable arcing contact; the circuit breaker does not have any ring electrodes.
  • the breaking chamber partially shown in axial section in FIG. 1 comprises a sealed casing 1 (made of porcelain for conventional circuit breakers, of metal for so-called metal grounded circuit breakers) filled with a gas with good dielectric properties such as sulfur hexafluoride under a pressure of a few bars.
  • a fixed assembly comprising a metal tube 2 electrically connected to a first outlet not shown and carrying a first metal tube 3 constituting the fixed main contact, a second metal tube 4 coaxial with the first and constituting the fixed arcing contact, and an insulating blowing nozzle 5, for example made of polytetrafluoroethylene (known for example under the registered trademark teflon).
  • the tube 4 is provided at its end with a part 4A of material resistant to the effects of the arc, for example tungsten carbide.
  • the volume 6 delimited by the tube 2 and the nozzle 5 constitutes the blowing volume of the circuit breaker.
  • the tube 4 can be either plugged at its inner end (single blowing) or open (double blowing).
  • the mobile equipment of the circuit breaker comprises a metal tube 8 electrically connected by sliding contacts not shown to a second socket.
  • the tube is connected to an insulating operating rod, not shown.
  • the tube 8 has one end which opens out to carry a contact tube 9 constituting the movable arcing contact and contact fingers 10 forming the movable permanent contact.
  • the tube 9 is provided at its end with a part 9A of material resistant to the effects of the arc.
  • the tube 9 is provided at its end with a nozzle 12 made of insulating material, which extends beyond the part 9A. This tip is secured to the tube 9 by screwing or crimping.
  • the material of the end piece is advantageously polytetrafluoroethylene.
  • the choice of this material is advantageous because it produces, when heated by the arc, fluorinated vapors which favor the breaking of the arc.
  • This material can be loaded, for example with glass fibers or with resin.
  • the invention applies to medium or high voltage circuit breakers, of the conventional type or with an earthed metal casing.

Landscapes

  • Circuit Breakers (AREA)
EP92402039A 1991-07-19 1992-07-15 Contact pour disjoncteur Withdrawn EP0524088A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109177 1991-07-19
FR9109177A FR2679375A1 (fr) 1991-07-19 1991-07-19 Contact pour disjoncteur.

Publications (1)

Publication Number Publication Date
EP0524088A1 true EP0524088A1 (fr) 1993-01-20

Family

ID=9415335

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402039A Withdrawn EP0524088A1 (fr) 1991-07-19 1992-07-15 Contact pour disjoncteur

Country Status (6)

Country Link
EP (1) EP0524088A1 (zh)
JP (1) JPH05190064A (zh)
CN (1) CN1068909A (zh)
BR (1) BR9202729A (zh)
CA (1) CA2074037A1 (zh)
FR (1) FR2679375A1 (zh)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709865A1 (fr) * 1993-09-08 1995-03-17 Gec Alsthom T & D Sa Contact d'arc pour disjoncteur à auto-soufflage.
WO2007016797A1 (de) * 2005-08-10 2007-02-15 Abb Research Ltd Selbstblasschalter mit steuerkörper
US7645957B2 (en) 2003-12-19 2010-01-12 Abb Technology Ag Nozzle for a gas-insulated switching device and related switching device
DE102009043195A1 (de) 2009-09-26 2011-03-31 Rwth Aachen Abbrandelement zur Anordnung an einem Schaltkontakt eines Leistungsschalters

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103943394A (zh) * 2013-01-23 2014-07-23 沈俊国 绝缘阻挡灭弧式电器开关触头
JP5921778B1 (ja) 2015-01-07 2016-05-24 三菱電機株式会社 ガス遮断器
CN110293511B (zh) * 2019-06-14 2020-11-24 平高集团有限公司 一种动弧触头装卸工装

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389219A1 (fr) * 1977-04-29 1978-11-24 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz
EP0152134A2 (en) * 1984-02-10 1985-08-21 ABB SACE S.p.A. Arc contact system for electrical circuit breakers, in particular of the type using an arc extinguishing fluid
EP0270895A1 (de) * 1986-12-08 1988-06-15 BBC Brown Boveri AG Druckgasschalter
DE3930550A1 (de) * 1989-09-13 1991-03-21 Licentia Gmbh Schaltkammer fuer sf(pfeil abwaerts)6(pfeil abwaerts)-leistungsschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389219A1 (fr) * 1977-04-29 1978-11-24 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz
EP0152134A2 (en) * 1984-02-10 1985-08-21 ABB SACE S.p.A. Arc contact system for electrical circuit breakers, in particular of the type using an arc extinguishing fluid
EP0270895A1 (de) * 1986-12-08 1988-06-15 BBC Brown Boveri AG Druckgasschalter
DE3930550A1 (de) * 1989-09-13 1991-03-21 Licentia Gmbh Schaltkammer fuer sf(pfeil abwaerts)6(pfeil abwaerts)-leistungsschalter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709865A1 (fr) * 1993-09-08 1995-03-17 Gec Alsthom T & D Sa Contact d'arc pour disjoncteur à auto-soufflage.
US7645957B2 (en) 2003-12-19 2010-01-12 Abb Technology Ag Nozzle for a gas-insulated switching device and related switching device
WO2007016797A1 (de) * 2005-08-10 2007-02-15 Abb Research Ltd Selbstblasschalter mit steuerkörper
DE102009043195A1 (de) 2009-09-26 2011-03-31 Rwth Aachen Abbrandelement zur Anordnung an einem Schaltkontakt eines Leistungsschalters
WO2011035781A1 (de) 2009-09-26 2011-03-31 Rwth Aachen Abbrandelement zur anordnung an einem schaltkontakt eines leistungsschalters

Also Published As

Publication number Publication date
CA2074037A1 (fr) 1993-01-20
JPH05190064A (ja) 1993-07-30
CN1068909A (zh) 1993-02-10
FR2679375A1 (fr) 1993-01-22
BR9202729A (pt) 1993-03-23

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