EP0456025B1 - Hochspannungsschalter mit Hilfslichtbogen in Reihe - Google Patents

Hochspannungsschalter mit Hilfslichtbogen in Reihe Download PDF

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Publication number
EP0456025B1
EP0456025B1 EP91106454A EP91106454A EP0456025B1 EP 0456025 B1 EP0456025 B1 EP 0456025B1 EP 91106454 A EP91106454 A EP 91106454A EP 91106454 A EP91106454 A EP 91106454A EP 0456025 B1 EP0456025 B1 EP 0456025B1
Authority
EP
European Patent Office
Prior art keywords
tube
contact
volume
fixed
blast
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
EP91106454A
Other languages
English (en)
French (fr)
Other versions
EP0456025A1 (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
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Filing date
Publication date
Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0456025A1 publication Critical patent/EP0456025A1/de
Application granted granted Critical
Publication of EP0456025B1 publication Critical patent/EP0456025B1/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
    • H01H33/70—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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc
    • H01H33/903—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 making use of the energy of the arc or an auxiliary arc and assisting the operating mechanism

Definitions

  • the present invention relates to a dielectric gas circuit breaker with self-blowing, of the type comprising additional contacts making it possible to generate, during an opening operation, a secondary arc in series with the main arc, the energy of this arc secondary being used to operate the device.
  • a circuit breaker of this type has for example been described in French Patent No. 2,610,763.
  • An object of the present invention is to provide a circuit breaker of the aforementioned type of simple embodiment, in particular in the generating part of the secondary arc.
  • Another object of the invention is to produce a circuit breaker not comprising sliding contacts in the area of the secondary arc; this area, in fact, is polluted by the decomposition products of the dielectric gas, which can cause a degradation of the quality of the sliding contacts.
  • Another object of the invention is to provide a circuit breaker comprising no insulating piston, the construction of which is expensive and which is subject to wear requiring frequent replacement.
  • Another object of the invention is to provide a circuit breaker with a mobile assembly which is light, so that it requires only a small operating energy for its operation.
  • said third tube is fixed by an insulating tubular portion to a fourth tube electrically connected to a second outlet of the circuit breaker, said second tube has its second end also in electrical contact with fingers electrically connected to said fourth tube and the other of said auxiliary contacts is fixed to said fourth tube, said auxiliary contacts coming into contact with a tube integral with the movable assembly and comprising an insulating portion and a metal portion , the position and the respective length of these two tubular portions being chosen so that in the engaged position, at least one of the auxiliary contacts is in contact with the insulating portion and so that during an opening operation, the two auxiliary contacts first come simultaneously into contact with the metal portion, at least one of said auxiliary contacts then leaving this metal portion.
  • the second end of said second tube is shaped as a bead carrying an outer cylindrical portion on which said fingers rest and a portion internal cylindrical bearing sliding contacts cooperating with said fourth tube.
  • the blowing piston is fitted with a calibrated one-way valve letting the gas pass from the inside to the outside of the blowing volume.
  • the blowing piston is fitted with a one-way valve allowing the passage of gas only from the outside to the inside of the blowing volume.
  • the second piston is fitted with a one-way valve allowing the passage of gas only from the outside to the inside of the second volume.
  • a breaking chamber will be described; it is understood that a high-voltage circuit breaker may comprise, for each phase, several breaking chambers of the type which will now be described.
  • the reference 1 designates an insulating envelope, preferably of porcelain, delimiting a chamber 2 filled with a gas with good dielectric properties, for example sulfur hexafluoride under a pressure of a few bars.
  • the fixed assembly comprises an arcing contact 3, consisting of a metal tube whose end 3A is made of a material resistant to the effects of the arcing, by example an alloy based on tungsten.
  • the fixed assembly also includes a main contact 4 consisting of fingers protected by a corona hood 5. The arcing contact and the fixed contact are electrically connected to a first socket, not shown.
  • the movable assembly comprises an operating part 6, consisting of a tube of insulating material passing through the chamber 2 in a sealed manner and connected to a mechanism not shown.
  • a metal assembly comprising two tubes 7 and 8, coaxial and connected by a metal ring 9. These tubes and this ring are preferably made in one piece from machining.
  • the tube 7 constitutes the movable arcing contact; its end 7A is made of material resistant to the effects of the arc and cooperates with the contact 3-3A.
  • the tube 8 has a first end 8A, of reduced diameter, and carrying a blowing nozzle 10 made of insulating material.
  • the tubular portion 8A constitutes the main movable contact of the circuit breaker and cooperates, when the circuit breaker is in the engaged position, as shown in FIG. 1, with the fingers 4.
  • the contact is effected by a portion of external cylindrical surface of the bead 8B.
  • bead 8B preferably forms a single piece with the tubes 7 and 8 and the crown 9.
  • the piston includes seals 17; it is provided with a calibrated valve 18 to limit the pressure inside the volume V1; this valve will be used, as we will see, when cutting low currents.
  • the piston finally comprises a one-way valve 19, authorizing the passage of gas only from the outside to the inside of the volume V1; this valve is a simple washer applied to holes 20 passing through the piston.
  • the crown 9 is pierced with holes 9A.
  • the bead 8B carries, on a cylindrical inner surface, sliding electrical contacts 22 bearing on the tube 14.
  • the bead 8B is pierced with holes 23 intended to lighten it and facilitate the circulation of the gas.
  • the tube 14 and the tube 11 carry, on either side of the insulating portion 15 two auxiliary contact elements 25 and 26 intended to form a secondary arc.
  • These elements consist of tube portions whose ends are made of an alloy resistant to the effects of the arc.
  • the contacts 25 and 26 cooperate with a switching tube fixed to the tube 7, therefore movable with it, and comprising an insulating portion 28 and a metal portion 29 the end of which is made of material resistant to the effects of the arc.
  • the circuit breaker further comprises a metal piston 30, integral with the operating tube 6, provided with a gasket 31 and a one-way valve 32 allowing the passage of gas only from the outside to the inside of the volume V2 constituted by the tubes 7 and 14, and the pistons 16 and 30.
  • the circuit breaker works as follows: in the on position ( Figure 1), the current flows through the fingers 4, the tube 8A-8-8B, the fingers 13, the crown 12 and the tube 11.
  • the operating tube is actuated and moves to the right of the figure.
  • the main contacts 4 and 8A separate (figure 2) and the current is switched on the arcing contacts 3 and 7A; the fingers 13 leave the bead 8A, but the contacts 25 and 26 come into contact with the metal portion of the switching tube; in this way, the current takes the following path: the tube 3, the tube 7, the crown 9, the tube 8, the bead 8B, the contacts 22, the tube 14, the contact 25, the tube 29, the contact 26 and tube 11.
  • the closing of the circuit breaker is caused by the movement to the left of the figures of the operating tube 6.
  • the valves 19 open during this maneuver, so that there is no need to overcome either depression or overpressure; the closing operation also requires only a low operating energy.
  • the circuit breaker of the invention has a simple structure, therefore economical, compact, therefore robust and rigid, without electrical contacts in the arcing zones, therefore of reduced maintenance.
  • the invention applies to the production of high voltage circuit breakers.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Arc Welding Control (AREA)
  • Lasers (AREA)
  • Organic Insulating Materials (AREA)

Claims (5)

  1. Hochspannungsschalter mit unter Druck stehende dielektrischen Gas, der für jede Phase mindestens eine Trennkammer aufweist, die eine mit dem Gas gefüllte isolierende Umhüllung und in dieser aufweist:
    - eine ortsfeste Einheit mit einem ortsfesten Hauptkontakt (4) und einem ortsfesten Lichtbogenkontakt (3-3A), die elektrisch an einen ersten Stromanschluß angeschlossen sind,
    - eine bewegliche Einheit mit einem Betätigungsorgan (6), das mit einem Bauteil fest verbunden ist, das von einem ersten den beweglichen Lichtbogenkontakt bildenden Rohr (7-7A) und von einem zweiten, zum ersten Rohr koaxialen Rohr (8-8A-8B) gebildet wird, dessen erstes Ende (8A) der bewegliche Hauptkontakt ist und eine Blasdüse (10) trägt, wobei das erste Rohr und das zweite Rohr ein Blasvolumen (V1) begrenzen, das durch einen die Rohre miteinander verbindenden durchbrochenen Kranz (9) und einen ortsfesten Blaskolben (16) verschlossen wird,
    - zwei Hilfslichtbogenkontakte (25, 26), die sich in einem bezüglich des ortsfesten Blaskolbens (16) zum Blasvolumen entgegengesetzt liegenden zweiten Volumen (V2) befinden, wobei der feste Blaskolben (16) von einem dritten Metallrohr (14) gehalten wird, das zum ersten Rohr (7-7A) koaxial liegt und mit diesem ersten Rohr und einem mit dem ersten Rohr /(7-7A) fest verbundenen zweiten Kolben (30) das zweite Volumen bildet,
    wobei ein zweites Ende (8B) des zweiten Rohrs mit dem dritten Rohr außerhalb dieses dritten Rohrs in elektrischem Kontakt steht und einer der Hilfskontakte (25) am dritten Rohr (14) befestigt ist,
    dadurch gekennzeichnet, daß das dritte Rohr (14) mit einem isolierende Abschnitt (15) an einem vierten Rohr (11) befestigt ist, das elektrisch mit einem zweiten Stromanschluß des Schalters verbunden ist, daß das zweite Rohr mit seinem zweiten Ende (8B) weiter in elektrischem Kontakt mit Fingern (13) steht, die elektrisch mit dem vierten Rohr (11) verbunden sind, und daß der andere der beiden Hilfskontakte am vierten Rohr befestigt ist, wobei die Hilfskontakte mit einem Rohr (28-29) in Berührung gelangen, das Teil der beweglichen Einheit ist und einen isolierenden Abschnitt (28) sowie einen metallischen Abschnitt (29) aufweist, wobei die Lage und Länge der beiden rohrförmigen Abschnitte so gewählt sind, daß bei geschlossenem Schalter mindestens einer der Hilfskontakte (26) mit dem isolierenden Abschnitt (28) in Kontakt steht und daß während eines Trennvorgangs die beiden Hilfskontakte zuerst gleichzeitig mit dem metallischen Abschnitt (29) in Kontakt gelangen, worauf mindestens einer der Hilfskontakte (25) diesen metallischen Abschnitt (29 verläßt.
  2. Schalter nach Anspruch 1, dadurch gekennzeichnet, daß das zweite Ende (8B) des zweiten Rohrs (8) wulstartig ausgebildet ist und einen äußeren zylindrischen Bereich, auf dem sich die Finger (13) abstützen, sowie einen zylindrischen Innenbereich aufweist, der mit dem vierten Rohr (14) zusammenwirkende Gleitkontakte (22) trägt.
  3. Schalter nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der ortsfeste Blaskolben (16) eine in einer Richtung wirksames Überdruckventil (18) besitzt, das das Gas nur von innerhalb des Blasvolumens (V1) nach außen durchläßt.
  4. Schalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der ortsfeste Blaskolben (16) ein Rückschlagventil (19) aufweist, das Gas nur von außerhalb des Blasvolumens (V1) ins Innere durchläßt.
  5. Schalter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der zweite Kolben (30) ein Rückschlagventil enthält, das Gas nur von außerhalb des zweiten Volumens (V2) ins Innere durchläßt.
EP91106454A 1990-04-26 1991-04-22 Hochspannungsschalter mit Hilfslichtbogen in Reihe Expired - Lifetime EP0456025B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9005326A FR2661550B1 (fr) 1990-04-26 1990-04-26 Disjoncteur a haute tension a arc serie.
FR9005326 1990-04-26

Publications (2)

Publication Number Publication Date
EP0456025A1 EP0456025A1 (de) 1991-11-13
EP0456025B1 true EP0456025B1 (de) 1995-03-01

Family

ID=9396115

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106454A Expired - Lifetime EP0456025B1 (de) 1990-04-26 1991-04-22 Hochspannungsschalter mit Hilfslichtbogen in Reihe

Country Status (10)

Country Link
US (1) US5160818A (de)
EP (1) EP0456025B1 (de)
JP (1) JP2563855B2 (de)
CN (1) CN1023924C (de)
AT (1) ATE119312T1 (de)
BR (1) BR9101564A (de)
CA (1) CA2041234C (de)
DE (1) DE69107670T2 (de)
ES (1) ES2070357T3 (de)
FR (1) FR2661550B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720188B1 (fr) * 1994-05-19 1996-06-14 Gec Alsthom T & D Sa Disjoncteur à autocompression réduite.
DE19524217A1 (de) * 1995-07-03 1997-01-09 Abb Research Ltd Leistungsschalter
CN101930871B (zh) * 2010-08-25 2012-11-21 中国西电电气股份有限公司 一种高压开关设备用高载流能力灭弧室
KR101483086B1 (ko) * 2013-05-21 2015-01-16 한국전기연구원 열팽창실 압력 제어형 복합 소호 가스차단기
CN106328430B (zh) * 2016-08-25 2018-08-07 中国西电电气股份有限公司 一种串联压气室的灭弧室
US10026571B1 (en) * 2017-03-31 2018-07-17 General Electric Technology Gmbh Switching chamber for a gas-insulated circuit breaker comprising an optimized thermal channel

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2349263C2 (de) * 1973-10-01 1982-08-26 Brown, Boveri & Cie Ag, 6800 Mannheim Elektrischer Druckgasschalter
JP2528100B2 (ja) * 1986-07-08 1996-08-28 株式会社日立製作所 パツフア形ガス遮断器
FR2610763B1 (fr) * 1987-02-09 1989-04-28 Alsthom Disjoncteur a faible energie de manoeuvre
FR2619246B1 (fr) * 1987-08-03 1989-11-17 Alsthom Disjoncteur a haute ou moyenne tension a gaz sous pression a energie de coupure prelevee sur celle de l'arc
FR2629260B1 (fr) * 1988-03-23 1994-07-08 Alsthom Disjoncteur a haute tension a faible energie de manoeuvre
FR2638564B1 (fr) * 1988-11-02 1990-11-30 Alsthom Gec Disjoncteur a haute tension a gaz dielectrique sous pression
FR2647949B1 (fr) * 1989-05-31 1994-02-18 Gec Alsthom Sa Disjoncteur a haute tension a gaz dielectrique de soufflage
FR2649531B1 (fr) * 1989-07-04 1995-11-10 Alsthom Gec Disjoncteur a haute ou moyenne tension

Also Published As

Publication number Publication date
CN1056767A (zh) 1991-12-04
JP2563855B2 (ja) 1996-12-18
FR2661550A1 (fr) 1991-10-31
JPH05159671A (ja) 1993-06-25
EP0456025A1 (de) 1991-11-13
ES2070357T3 (es) 1995-06-01
CA2041234C (fr) 1994-11-22
DE69107670D1 (de) 1995-04-06
CN1023924C (zh) 1994-03-02
DE69107670T2 (de) 1995-06-29
FR2661550B1 (fr) 1992-06-12
ATE119312T1 (de) 1995-03-15
US5160818A (en) 1992-11-03
BR9101564A (pt) 1991-12-10

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