EP0525716B1 - Mittel- oder Hochspannungslastschalter mit aufeinanderstossenden Lichtbogenkontakten - Google Patents

Mittel- oder Hochspannungslastschalter mit aufeinanderstossenden Lichtbogenkontakten Download PDF

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Publication number
EP0525716B1
EP0525716B1 EP92112850A EP92112850A EP0525716B1 EP 0525716 B1 EP0525716 B1 EP 0525716B1 EP 92112850 A EP92112850 A EP 92112850A EP 92112850 A EP92112850 A EP 92112850A EP 0525716 B1 EP0525716 B1 EP 0525716B1
Authority
EP
European Patent Office
Prior art keywords
contact
tube
abutting
circuit breaker
annular end
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
EP92112850A
Other languages
English (en)
French (fr)
Other versions
EP0525716A1 (de
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 EP0525716A1 publication Critical patent/EP0525716A1/de
Application granted granted Critical
Publication of EP0525716B1 publication Critical patent/EP0525716B1/de
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
    • H01H33/02—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
    • 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

Definitions

  • the present invention relates to a circuit breaker with end arcing contacts, usable at medium or high voltage.
  • a medium or high voltage circuit breaker with end arcing contacts comprising in a casing filled with gases with good dielectric properties a first contact at fixed end connected to a first socket-outlet and a mobile assembly comprising a first tube.
  • said circuit breaker further comprising a second semi-movable tubular end contact pushed on its annular end by a first end of a spring supported by its second end on an annular shoulder of the first tube, the annular end of the second contact cooperating by abutment with an annular end of the first tube for opening the end contacts, this annular end carrying an additional contact and the difference in lengths of the second end contact and its annular end being slightly greater than the sum of the lengths of said additional contact and of the annular end to which it is integral.
  • Circuit breakers with end arcing contacts are known in which the arc is blown by compression of the gas during an opening operation.
  • gas compression occurs before the separation of the arcing contacts (precompression).
  • precompression the main contacts of the circuit breaker are opened, which can be arranged outside the enclosure.
  • the present invention proposes to solve this problem of repulsion of end contacts without increasing the compression force of the spring.
  • the main contacts are integrated into the circuit breaker by a simple and space-saving arrangement.
  • the circuit breaker according to the invention is characterized in that said additional contact consists of a ring of contact arm sliding on the first end contact and comprising at their end an arcing contact pad made of resistant material at the arc and near the latter a permanent contact bead of conductive metal, and in that said first tube defines with a second tube a blowing volume and is extended by a blowing nozzle.
  • the outside diameter of the first end contact is slightly greater than that of the second end contact.
  • the internal diameters of the stud and of the bead are smaller than the external diameter of the second contact, in the free state, the arms being relatively flexible radially, and the internal diameter of the bead is slightly smaller than that of the stud.
  • Figure 1 is a partial view in longitudinal section of a circuit breaker according to an embodiment of the invention in the closed position.
  • Figure 2 is a partial view in longitudinal section of a circuit breaker according to an embodiment of the invention in the intermediate open position.
  • Figure 3 is a partial view in longitudinal section of a circuit breaker according to an embodiment of the invention in the arc start position.
  • Figure 4 is a partial view in longitudinal section of a circuit breaker according to an embodiment of the invention in the open position.
  • a cylindrical envelope for example made of porcelain, delimits a sealed interior volume filled with gases with good dielectric properties such as SF6, pure or mixed with nitrogen, under a pressure of a few bars.
  • the first contact at the fixed end 8 of the circuit breaker consists of a metal tube connected to a block passing through the casing in a sealed manner and connected to a first outlet.
  • the end 8 ′ of the tube 8 is made of an alloy resistant to arc effects, for example based on tungsten.
  • the second movable end contact 9 consists of a metal tube, the end 9 'of which cooperates with the contact 8 is also made of an arc-resistant alloy.
  • This tube 9 has, near its opposite end 9A at the end 9 ', a lateral bore 9B for the evacuation of the gas.
  • This end 9A is annular with a diameter greater than that of the tube 9 and is sliding in a tube 2.
  • This tube 2 can be moved by an operating rod and it is connected to a second socket. It defines with a second tube a blowing volume 5 and it is extended by a blowing nozzle 4.
  • the movable assembly therefore consists of this tube 2 driven in translation and of the second semi-mobile contact 9 by sliding in the tube 2 and pushed on its annular end 9A by the first end of a spring 10 supported by its second end on an annular shoulder of the tube 2.
  • the end facing the fixed contact 8 of the tube 2 comprises an annular part 2A which cooperates by abutment with the annular end 9A of the semi-mobile contact 9 for the opening of the end contacts 8, 9, as will be seen more precisely further.
  • the annular end 9A is guided relative to the tube 2 by an insulating segment 11 and the annular end 2A is guided relative to the tube 9 by an insulating segment 12.
  • This annular end 2A carries a contact consisting of a crown of contact arm 20 sliding on the fixed contact 8 via an arcing contact pad 21 and a permanent contact bead 22, disposed near this pad 21.
  • the arcing contact pad 21 is made of an arc-resistant material, for example based on tungsten, while the permanent contact bead 22 is made of conventional conductive metal like the arms 20.
  • the end contacts 8 and 9 are butted, the beads 22 are in contact with the lateral surface of the fixed contact 8 and the studs 21 are very slightly spaced from this lateral surface; the permanent current represented by an arrow passes from the first current outlet to the second current outlet through the tube 8, the beads 22, the arms 20 and the tube 2.
  • the annular end 2A abuts with the annular end 9A and, taking into account the dimensional arrangements already specified, the pads 21 are at a small distance from the fixed contact 8 which is always abutted with the semi-mobile contact 9; the current, represented by an arrow, then passes from the first outlet to the second outlet through the tube 8, the tube 9, the beads 22, the arms 20 and the tube 2; in the event of high short-circuit currents and resulting repulsive forces, the semi-mobile contact 9 can move away without damage; in fact, the arc created between the end 8 'of the fixed contact 8 and the end 9' of the semi-mobile contact 9 is then transferred very quickly between the end 8 'of the fixed contact 8 and the stud 21, as soon as the distance between the end contacts 8 and 9 exceeds that between the contact 8 and the studs 21.
  • the opening is then terminated by separation of the end contacts 8 and 9, the tube 2 driving the contact 9, as shown in FIG. 4.
  • the problem caused by the repulsion of the end contacts 8 and 9 is solved just as much with the separation of these contacts on opening, as with the coming into contact of these contacts on closing.
  • studs 21 made of an arc-resistant alloy protects the metal beads 22, preferably made of copper, from the destructive effects of the arc. electric, these beads 22 being intended for the passage of permanent current.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Arc Welding Control (AREA)

Claims (3)

  1. Mittel- oder Hochspannungslastschalter, der in einer mit einem Gas guter dielektrischer Eigenschaften gefüllten Hülle einen ersten, ortsfesten stirnseitig wirksamen Kontakt (8), der mit einem ersten Stromanschluß verbunden ist, und ein bewegliches Organ aufweist, das ein erstes Rohr (2) enthält, das durch eine Betätigungsstange verschoben werden kann und mit einem zweiten Stromanschluß verbunden ist, wobei der Schalter weiter einen zweiten, halbbeweglichen, rohrförmigen stirnseitig wirksamen Kontakt (9) aufweist, der an seinem ringförmigen Ende (9A) von einem ersten Ende einer Feder (10) beaufschlagt wird, die mit ihrem zweiten Ende auf einer ringförmigen Schulter des ersten Rohrs (2) aufliegt, wobei das ringförmige Ende (9A) des zweiten Kontakts (9) durch Anschlag mit einem ringförmigen Ende (2A) des ersten Rohrs (2) beim Öffnen der stirnseitig aneinanderstoßenden Kontakte (8, 9) zusammenwirkt, wobei dieses ringförmige Ende (2A) einen zusätzlichen Kontakt trägt und der Längenabstand zwischen dem zweiten stirnseitig wirksamen Kontakt (9) und seinem rohrförmigen Ende (9A) geringfügig größer als die Summe der Längen des zusätzlichen Kontakts und des ringförmigen Endes (2A) ist, an dem er befestigt ist, dadurch gekennzeichnet, daß der zusätzliche Kontakt aus einem Kranz von Kontaktarmen (20) besteht, die auf dem ersten anstoßenden Kontakt (8) gleiten und an ihrem Ende einen Lichtbogenkontaktansatz (21) aus gegen den Lichtbogen beständigem Material und in der Nähe dieses Ansatzes einen Dauerkontakt-Wulst (22) aus leitendem Metall aufweisen, und daß das erste Rohr (2) mit einem zweiten Rohr ein Blasvolumen (5) definiert und von einer Blasdüse (4) verlängert wird.
  2. Lastschalter nach Anspruch 1, dadurch gekennzeichnet, daß der Außendurchmesser des ersten stirnseitig wirksamen Kontakts (8) geringfügig größer ist als der des zweiten stirnseitig wirksamen Kontakts (9).
  3. Lastschalter nach Anspruch 2, dadurch gekennzeichnet, daß
    - die Innendurchmesser des Ansatzes (21) und des Wulsts (22) kleiner sind als der Außendurchmesser des zweiten Kontakts (9) im freien Zustand, wobei die Arme (20) radial relativ flexibel sind,
    - der Innendurchmesser des Wulsts (22) geringfügig kleiner ist als der des Ansatzes (21).
EP92112850A 1991-08-02 1992-08-01 Mittel- oder Hochspannungslastschalter mit aufeinanderstossenden Lichtbogenkontakten Expired - Lifetime EP0525716B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9109887 1991-08-02
FR9109887A FR2680044B1 (fr) 1991-08-02 1991-08-02 Disjoncteur a moyenne ou haute tension a contacts d'arc en bout.

Publications (2)

Publication Number Publication Date
EP0525716A1 EP0525716A1 (de) 1993-02-03
EP0525716B1 true EP0525716B1 (de) 1997-11-26

Family

ID=9415891

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92112850A Expired - Lifetime EP0525716B1 (de) 1991-08-02 1992-08-01 Mittel- oder Hochspannungslastschalter mit aufeinanderstossenden Lichtbogenkontakten

Country Status (11)

Country Link
US (1) US5258590A (de)
EP (1) EP0525716B1 (de)
JP (1) JPH0793076B2 (de)
CN (1) CN1028134C (de)
AT (1) ATE160647T1 (de)
BR (1) BR9202992A (de)
CA (1) CA2074893C (de)
DE (1) DE69223292T2 (de)
DK (1) DK0525716T3 (de)
ES (1) ES2110455T3 (de)
FR (1) FR2680044B1 (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709597B1 (fr) * 1993-08-30 1995-10-13 Gec Alsthom T & D Sa Disjoncteur à moyenne ou haute tension à contacts en bout.
FR2709866B1 (fr) * 1993-09-08 1995-10-13 Gec Alsthom T & D Sa Disjoncteur à contacts en bout et à grande tension d'arc.
FR2762925B1 (fr) * 1997-05-02 1999-07-09 Gec Alsthom T & D Sa Disjoncteur a haute tension a double mouvement des contacts d'arc
CN101599391B (zh) * 2009-07-13 2013-02-27 西安森源配电自动化设备有限公司 单断口单气缸自能式高压六氟化硫断路器灭弧室
FR2962253B1 (fr) 2010-07-01 2012-08-31 Areva T & D Sas Chambre de coupure pour disjoncteur a moyenne ou haute tension a energie de man?uvre et dimensions reduites
DE102010062343A1 (de) * 2010-12-02 2012-06-06 Siemens Aktiengesellschaft Elektrokontaktanordnung
CN102290278B (zh) * 2011-08-04 2015-04-22 中国西电电气股份有限公司 用于电开关设备的引弧装置
JP6157824B2 (ja) * 2012-09-28 2017-07-05 株式会社東芝 ガス遮断器
JP6289856B2 (ja) * 2013-10-16 2018-03-07 株式会社東芝 ガス遮断器
JP2017050048A (ja) * 2015-08-31 2017-03-09 株式会社日立製作所 ガス遮断器
CN105977073B (zh) * 2016-06-07 2018-07-06 平高集团有限公司 喷口连接结构及使用该结构的灭弧室和断路器
WO2018109931A1 (ja) 2016-12-16 2018-06-21 株式会社 東芝 ガス絶縁開閉装置
WO2021138366A1 (en) * 2019-12-31 2021-07-08 Southern States Llc High voltage electric power switch with carbon arcing electrodes and carbon dioxide dielectric gas

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE382647A (de) *
DE946638C (de) * 1951-04-06 1956-08-02 Sachsenwerk Licht & Kraft Ag Schubtrennschalter fuer zusaetzliche Lastabschaltung
CH327093A (de) * 1954-10-28 1958-01-15 Tokyo Shibaura Electric Co Schalter mit Lichtbogenlöschung durch einen Druckmittelstrom
CH519773A (de) * 1970-08-14 1972-02-29 Bbc Brown Boveri & Cie Kontaktanordnung für Druckgasschalter
DE2209287C3 (de) * 1972-02-22 1974-12-12 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektrischer Druckgasschalter
JPS61177337U (de) * 1985-04-19 1986-11-05
JPS62197232U (de) * 1986-06-04 1987-12-15
JPS6345721A (ja) * 1986-06-06 1988-02-26 三菱電機株式会社 開閉器

Also Published As

Publication number Publication date
FR2680044A1 (fr) 1993-02-05
DE69223292D1 (de) 1998-01-08
CN1028134C (zh) 1995-04-05
EP0525716A1 (de) 1993-02-03
CN1069363A (zh) 1993-02-24
FR2680044B1 (fr) 1995-01-20
CA2074893C (fr) 1996-05-21
JPH0793076B2 (ja) 1995-10-09
BR9202992A (pt) 1993-03-30
ES2110455T3 (es) 1998-02-16
US5258590A (en) 1993-11-02
CA2074893A1 (fr) 1993-02-03
ATE160647T1 (de) 1997-12-15
JPH05198235A (ja) 1993-08-06
DK0525716T3 (da) 1998-05-18
DE69223292T2 (de) 1998-03-26

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