EP0461629B1 - Leistungsschalter mit eingebautem Varistor - Google Patents

Leistungsschalter mit eingebautem Varistor Download PDF

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Publication number
EP0461629B1
EP0461629B1 EP91109609A EP91109609A EP0461629B1 EP 0461629 B1 EP0461629 B1 EP 0461629B1 EP 91109609 A EP91109609 A EP 91109609A EP 91109609 A EP91109609 A EP 91109609A EP 0461629 B1 EP0461629 B1 EP 0461629B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
varistor
electrode
moving equipment
chamber
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
EP91109609A
Other languages
English (en)
French (fr)
Other versions
EP0461629A1 (de
Inventor
Doan Pham Van
Edmond Thuries
Joseph Martin
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 EP0461629A1 publication Critical patent/EP0461629A1/de
Application granted granted Critical
Publication of EP0461629B1 publication Critical patent/EP0461629B1/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
    • H01H33/16—Impedances connected with contacts
    • H01H33/161—Variable impedances

Definitions

  • the present invention relates to a high-voltage circuit breaker equipped with varistors to limit overvoltages at cut-off.
  • Patent application FR-A-2506067 describes a circuit breaker according to the preamble of claim 1.
  • An object of the present invention is to provide a circuit breaker provided with a varistor insertion device during the opening phase of the circuit breaker, which is simple, reliable and inexpensive and which, in particular, does not include a delay system, no complex moving part, no insertion electrode placed on the arc path.
  • the arrangements according to the invention make it possible to implement the invention by a minimal modification of the existing circuit breakers, even if the distance between the contacts, in the open position of the circuit breaker, is small.
  • circuit breaker as defined by claim 1.
  • the reference 1 designates a cylindrical insulating envelope, preferably made of porcelain, delimiting an interior volume 2, constituting the breaking chamber of the circuit breaker, filled with a gas with high dielectric strength, such as sulfur hexafluoride , under a pressure of a few bars.
  • a gas with high dielectric strength such as sulfur hexafluoride
  • the circuit breaker comprises a fixed main contact formed by a tube 3 connected mechanically and electrically by arms 4 to a first socket 5 of the circuit breaker.
  • the contact 3 is integral with a fixed arcing contact 6, also consisting of a tubular part; this contact 6 is electrically connected to contact 3.
  • the circuit breaker moving element includes a contact main mobile formed by contact fingers 9, protected by a corona hood 10 and cooperating with the tube 3. It also comprises an arcing contact formed by fingers 11, cooperating with the tube 6, and a blowing nozzle 12.
  • the corona hood 10 is fixed to or forms an integral part of a metallic cylindrical part 10A fixed to an operating rod not shown and in electrical connection by contacts suitable for a second socket not shown.
  • the circuit breaker is supplemented by blowing means comprising in particular a fixed blowing piston 13.
  • the blowing means which are not part of the invention, have not been shown in more detail. They are made in a manner well known to those skilled in the art.
  • the circuit breaker comprises a varistor 20 placed inside the breaking chamber; this varistor is preferably formed by a stack of pellets with metal oxides based on zinc oxide (ZnO).
  • the pellets form a cylindrical column coaxial with the envelope 1.
  • Resistive pads 20A symbolically represented in the drawing with a thickness different from that of the pads 20, can be placed in series with the latter and extend the aforementioned stacking. Their role, as we will see later, is to limit the power in the varistor elements.
  • the stack is pressed, at the upper part of the chamber, by a spring 21 which also bears against a metal cover 22 closing the chamber and electrically connected to the socket 5.
  • a metal braid 19 provides electrical continuity between resistance-varistor stack and cover 22.
  • the pellets are held by an insulating tube 23 closed at its lower part by a metal end piece 24, in electrical contact with the last tablet of the stack.
  • Electrode 100 comprising a metal ring 101, for example made of copper, having a contact finger 102.
  • the ring 101 is held by two arms 103 fixed to the end piece 24.
  • the contact finger 102 rubs on a metallic tubular electrode 105 secured to the movable assembly and electrically connected to the movable contacts.
  • the distance d1 separating the ring 102 and the electrode 105 when the circuit breaker is in the open position, is approximately equal to half of the distance d2 then separating the arcing contacts 6 and 11.
  • the arc duration mentioned above corresponds to a varistor insertion time of the order of 15 ms. This duration is sufficient to ensure the effective limitation of overvoltages, in particular during the deactivation of line reactors, the cut-off of idle lines and the cut-off. on three-phase fault with regard to the first pole of the circuit breaker which cuts.
  • the low voltage applied to the varistor when the circuit breaker is in the open position prevents the varistor from any risk of thermal runaway, partial discharges, etc., as did the series switch of the prior art described above.
  • the varistor When closing the circuit breaker, the varistor is first inserted into the circuit by contacting parts 101 and 105; the rear contact of the arcing contacts 6 and 11 then short-circuits the varistor.
  • the energy of the varistor is determined for a closing-opening cycle in phase opposition.
  • the varistor can be placed within the dielectric gas, since the tube 23 is not sealed.
  • the varistor is separated from the gas in the switching chamber by an insulating cone 110, sealed.
  • the varistor is then placed in dry air at atmospheric pressure.
  • This arrangement has the advantage of allowing the varistor to be replaced without emptying the cutting chamber of the sulfur hexafluoride under pressure that it contains.
  • Figures 2 to 4 illustrate the insertion mechanism according to the invention usable in particular when the circuit breaker has a relatively small distance d2.
  • the tubular electrode 105 described above is now replaced by a tubular electrode 205, sliding with gentle friction around the tubes 10 and 10A; the tube 205 carries at a first end a protrusion 205A for electrical contact with the ring 102, and at its second end a bead 205B, serving to support a first end of a spring 203.
  • the spring is contained by a metallic tubular piece 204 fixed at one end to the tube 10 and carrying, at its other end, a bead 206. The second end of the spring 203 bears against the bead 206.
  • the piece 204 is in electrical contact with the bead 205B of the room 205; the part 204 carries, towards its end on the bead side, holes 204A whose role will appear later.
  • the tube 10 also carries holes 10B in the vicinity of the foot for fixing the tubular part 204.
  • the tube 10 moves down the figure; the gas in the blowing volume V1 is compressed and exerts, by the holes 10B, pressure on the bead 205A, so that the electrode 205 moves in the opposite direction, against the action of the spring 203 which is compressed.
  • the displacement of the electrode 205 is also helped by the acceleration at the opening of the movable contact.
  • the holes 204A are used for evacuating the gas from the volume between the tubes 204 and 205, which makes it possible not to increase the operating energy too much.
  • the electrode 205 On closing, the electrode 205 is pressed against the bead 206 due to the acceleration of the movable contact and the depression of the volume V1.
  • the electrode 205 in the form of a metal rod sliding inside a small diameter tube attached to the tube 10. This arrangement makes it possible to have a small volume of compressed gas. under electrode 205.
  • the invention applies to high voltage circuit breakers, conventional and shielded.

Landscapes

  • Circuit Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Thermistors And Varistors (AREA)
  • Cookers (AREA)
  • Discharge Lamp (AREA)
  • Organic Insulating Materials (AREA)

Claims (6)

  1. Hochspannungs-Trennschalter mit Isolierung durch ein Gas mit guten dielektrischen Eigenschaften, der mindestens eine Trennkammer pro Phase aufweist, wobei jede Kammer (2) einen festen Hauptkontakt (3), der mit einem ersten Stromanschluß (5) verbunden ist, und einen beweglichen Hauptkontakt (9) besitzt, der mit einem zweiten Stromanschluß in elektrischer Verbindung steht und Teil einer beweglichen Einheit ist, die mit einem Betätigungsmechanismus verbunden ist, wobei jede Kammer außerdem einen Varistor (20) aufweist, der in der Verlängerung der Hauptkontakte angeordnet ist und beim Schließen und zu Anfang des Öffnens des Trennschalters mittels zweiter Elektroden eingefügt wird, die außerhalb der und um die Hauptkontakte (3, 9) herum angeordnet sind, wobei eine erste Elektrode (100) elektrisch und mechanisch mit dem Varistor (20) verbunden ist, während die zweite Elektrode (205) mechanisch mit der beweglichen Einheit und elektrisch mit dem beweglichen Hauptkontakt (9) verbunden ist, dadurch gekennzeichnet, daß die zweite Elektrode (205) in Bezug auf die bewegliche Einheit eine Translationsbewegung begrenzter Amplitude durchführen kann und bei der Öffnung des Trennschalters in entgegengesetzter Richtung zur beweglichen Einheit verschiebbar ist und dann am Ende des Öffnungsvorgangs des Trennschalters wieder in ihre ursprüngliche Stellung zurückgeholt wird.
  2. Trennschalter nach Anspruch 1, dadurch gekennzeichnet, daß die zweite Elektrode (205) bei der Öffnung des Trennschalters in Bezug auf die bewegliche Einheit in entgegengesetzter Richtung zu der der beweglichen Einheit durch den Druck des in einer Blaskammer (V1) komprimierten Gases verschiebbar ist, wobei die zweite Elektrode in ihre Ursprungsstellung beim Ende des Öffnungsvorgangs des Trennschalters durch eine Feder (203) zurückgeholt wird.
  3. Trennschalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Varistor (20), wenn der Trennschalter in der eingeschalteten Stellung ist, eine Spannung aushält, die 30% der an die Trennkammer angelegten Spannung nicht übersteigt.
  4. Trennschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Varistor (20) in einen Raum eingeschlossen ist, der mit unter Druck stehendem Gas mit guten dielektrischen Eigenschaften gefüllt ist.
  5. Trennschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Varistor (20) in einen mit unter Atmosphärendruck stehender trockener Luft gefüllten Raum eingeschlossen ist.
  6. Trennschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Varistor (20) mit einem Widerstand (20A) geringen ohm'schen Werts in Reihe liegt.
EP91109609A 1990-06-14 1991-06-12 Leistungsschalter mit eingebautem Varistor Expired - Lifetime EP0461629B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007425A FR2663456B1 (fr) 1990-06-14 1990-06-14 Disjoncteur a varistance incorporee.
FR9007425 1990-06-14

Publications (2)

Publication Number Publication Date
EP0461629A1 EP0461629A1 (de) 1991-12-18
EP0461629B1 true EP0461629B1 (de) 1995-05-17

Family

ID=9397604

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91109609A Expired - Lifetime EP0461629B1 (de) 1990-06-14 1991-06-12 Leistungsschalter mit eingebautem Varistor

Country Status (10)

Country Link
US (1) US5164559A (de)
EP (1) EP0461629B1 (de)
JP (1) JPH0779012B2 (de)
CN (1) CN1025390C (de)
AT (1) ATE122817T1 (de)
BR (1) BR9102443A (de)
CA (1) CA2044517C (de)
DE (1) DE69109749T2 (de)
ES (1) ES2073068T3 (de)
FR (1) FR2663456B1 (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674984B1 (fr) * 1991-04-05 1993-06-11 Alsthom Gec Disjoncteur a sf6 a varistance et a condensateur incorpores.
FR2676587B1 (fr) * 1991-05-17 1994-06-10 Alsthom Gec Disjoncteur a grand pouvoir de coupure.
FR2676857B1 (fr) * 1991-05-22 1994-04-08 Gec Alsthom Sa Dispositif d'insertion d'une varistance, incorpore dans un disjoncteur a haute tension.
FR2682219B1 (fr) * 1991-10-02 1997-01-31 Alsthom Gec Disjoncteur ultra haute tension.
FR2688624A1 (fr) * 1992-03-10 1993-09-17 Alsthom Gec Contact a inertie pour disjoncteur permettant l'insertion temporaire d'une impedance.
CN1040810C (zh) * 1993-07-06 1998-11-18 郑江 无弧式高压开关的触头机构
FR2712118B1 (fr) * 1993-11-02 1995-12-29 Gec Alsthom T & D Sa Disjoncteur avec dispositif d'insertion d'un composant électrique.
FR2748597B1 (fr) * 1996-05-13 1998-06-12 Gec Alsthom T & D Sa Disjoncteur a haute tension avec insertion de resistance a la fermeture
US6236010B1 (en) 1999-07-14 2001-05-22 Southern States, Inc. Circuit interrupter including a penetrating electrical contact with grip and release structure
US6316742B1 (en) 1999-07-14 2001-11-13 Southern States, Inc. Limited restrike circuit interrupter used as a line capacitor and load switch
EP2169794A1 (de) * 2008-09-26 2010-03-31 Eaton Electric B.V. Schaltinstallation mit Bogenschutz und Bogenschutzverfahren
JP5178644B2 (ja) * 2009-06-29 2013-04-10 株式会社東芝 投入抵抗接点付きガス遮断器及びその投入、遮断方法
CN101825894B (zh) * 2010-04-30 2012-07-18 北京航空航天大学 一种六氟化硫高压断路器状态智能监测与健康管理系统
KR101415065B1 (ko) * 2010-11-17 2014-07-04 엘에스산전 주식회사 회로차단기의 접점장치
WO2015021010A1 (en) * 2013-08-05 2015-02-12 Faulkner Roger W Commutating switch with blocking semiconductor
FR3022682B1 (fr) * 2014-06-20 2018-04-06 Abb France Indicateur de deconnexion d’un composant actif de dispositif de protection d’une installation electrique
CN106207649A (zh) * 2016-08-23 2016-12-07 周刚 一种无电弧的电连接或断电方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912974A (en) * 1970-02-18 1975-10-14 George Leslie Hill Circuit breaker
JPS4830058A (de) * 1971-08-24 1973-04-20
US4204101A (en) * 1977-06-22 1980-05-20 Gould Inc. Hybrid circuit breaker with varistor in parallel with vacuum interrupter
JPS5517929A (en) * 1978-07-26 1980-02-07 Hitachi Ltd Buffer type gas breaker
FR2450501A1 (fr) * 1979-03-02 1980-09-26 Alsthom Cgee Dispositif d'insertion de resistance a la fermeture d'un appareil d'interruption
JPS55173034U (de) * 1979-05-31 1980-12-11
CA1171444A (fr) * 1980-07-23 1984-07-24 Marcel Besson Disjoncteur a gaz comprime
FR2506067A1 (fr) * 1981-05-15 1982-11-19 Alsthom Atlantique Disjoncteur a haute tension
FR2512267A1 (fr) * 1981-08-26 1983-03-04 Alsthom Atlantique Disjoncteur a gaz comprime muni de resistances d'ouverture et de fermeture
JPS58121519A (ja) * 1982-01-12 1983-07-19 株式会社日立製作所 抵抗接点付きしや断器
JPS58154536U (ja) * 1982-04-12 1983-10-15 株式会社日立製作所 抵抗接点付きしや断器
DE3411445A1 (de) * 1984-02-06 1985-08-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Hochspannungsschalter
CH665053A5 (de) * 1984-11-12 1988-04-15 Bbc Brown Boveri & Cie Schalteranordnung zum abschalten einer reaktanz.
JPS61225727A (ja) * 1985-03-29 1986-10-07 株式会社日立製作所 遮断器
FR2612683B1 (fr) * 1987-03-18 1994-06-03 Alsthom Disjoncteur a haute tension a resistance de fermeture

Also Published As

Publication number Publication date
EP0461629A1 (de) 1991-12-18
CA2044517A1 (fr) 1991-12-15
US5164559A (en) 1992-11-17
CA2044517C (fr) 1994-12-27
DE69109749D1 (de) 1995-06-22
ATE122817T1 (de) 1995-06-15
CN1025390C (zh) 1994-07-06
CN1057362A (zh) 1991-12-25
JPH04229915A (ja) 1992-08-19
FR2663456B1 (fr) 1996-04-26
FR2663456A1 (fr) 1991-12-20
DE69109749T2 (de) 1995-09-21
BR9102443A (pt) 1992-01-14
JPH0779012B2 (ja) 1995-08-23
ES2073068T3 (es) 1995-08-01

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