EP0406794B1 - Hoch- oder Mittelspannungslastschalter - Google Patents

Hoch- oder Mittelspannungslastschalter Download PDF

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Publication number
EP0406794B1
EP0406794B1 EP90112672A EP90112672A EP0406794B1 EP 0406794 B1 EP0406794 B1 EP 0406794B1 EP 90112672 A EP90112672 A EP 90112672A EP 90112672 A EP90112672 A EP 90112672A EP 0406794 B1 EP0406794 B1 EP 0406794B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
contact
moving
fixed
assembly
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
EP90112672A
Other languages
English (en)
French (fr)
Other versions
EP0406794A1 (de
Inventor
Edmond Thuries
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 EP0406794A1 publication Critical patent/EP0406794A1/de
Application granted granted Critical
Publication of EP0406794B1 publication Critical patent/EP0406794B1/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 circuit breaker usable in high or medium voltage, in which the breaking chamber is filled with dielectric gas such as sulfur hexafluoride (SF6), and in which the energy of the arc is used, thanks to the increase in pressure which it gives to the gas, on the one hand to blow the arc which is established at the separation of the arcing contacts and, on the other hand, to provide additional energy to the circuit breaker opening mechanism.
  • dielectric gas such as sulfur hexafluoride (SF6)
  • circuit breaker with a pair of additional contacts capable of generating, when the circuit breaker opens, a secondary arc.
  • a disadvantage of the circuit breaker of the prior art is the weighting of the movable assembly by the presence of one of the secondary contacts. This increase results in the need to provide the circuit breaker with an increased power control mechanism, which increases the cost price of the device.
  • An object of the invention is to provide a circuit breaker with secondary contacts, in which the mobile assembly is not weighed down.
  • Another object of the invention is to produce a compact circuit breaker, therefore of reduced construction cost price and whose maintenance costs are reduced.
  • Document DE-A-2403300 discloses a circuit breaker provided with secondary contacts; one of them, the furthest from the blowing nozzle, is integral with the mobile assembly; the other is semi-mobile relative to the fixed crew.
  • a circuit breaker has a drawback: the length of the secondary arc is not limited; as a result, during an opening operation of the circuit breaker, the arc lengthens so too large, which has the effect of overheating the surrounding gas; this excessive heating can prevent the circuit-breaker from carrying out a rapid open-close-open cycle (OFO), because the gas, after a first opening, does not have time to cool down sufficiently; as a result, the medium remains very ionized, and the second opening maneuver may fail, the secondary arc not extinguishing when the current crosses zero.
  • OFO open-close-open cycle
  • An additional object of the present invention is to provide a circuit breaker which does not have the aforementioned drawbacks.
  • Document EP-A-0 302 390 discloses an arc self-blowing circuit breaker with a blowing piston placed in a blowing volume comprising, in addition to the main contacts and arcing contacts, a first and a second secondary contact, arranged in a volume separate from the blowing volume, the second secondary contact being semi-mobile relative to the fixed assembly of the circuit breaker, having a source of energy of its own for its displacement during the tripping operation of the circuit breaker, this contact being provided with means for giving it a stroke less than that of the mobile assembly.
  • An object of the invention is to provide a simpler circuit breaker with such high efficiency.
  • circuit breaker as defined by the main claim.
  • circuit breaker as defined by the main claim.
  • secondary claims Regarding features of a preferred implementation of this circuit breaker reference is made to the secondary claims.
  • the reference 1 designates a cylindrical envelope of axis xx, in insulating material such as ceramic, delimiting an interior volume 2 filled with a gas with good dielectric properties, such as sulfur hexafluoride (SF6) , under a pressure of a few bars.
  • a gas with good dielectric properties such as sulfur hexafluoride (SF6)
  • the elements of the switching chamber are of revolution around the axis xx, which gives the device compactness and ease of assembly and maintenance.
  • the circuit breaker comprises a fixed main contact 3 consisting of fingers arranged in a tulip; this contact is surrounded by a corona hood 4.
  • the main contact 3 is associated with a fixed arcing contact constituted by a metal tube 5 terminated by a piece 5A of material resistant to the effects of the arcing such as an alloy based on tungsten.
  • the two aforementioned fixed contacts are electrically connected to a first outlet not shown.
  • the moving element comprises a metal tube 6, terminated by a wearing part 6A, constituting the moving arcing contact.
  • This tube is connected to a rod 8 made of insulating material, used for tripping and reclosing operations of the circuit breaker.
  • the moving element further comprises a tube 9, of axis xx, having at one end a portion 9A of narrowed diameter which constitutes the moving main contact. This portion also serves as a support for a blowing nozzle 10, made of insulating material such as polytetrafluoroethylene.
  • the tube 6 and the tube 9 are joined by an insulating ring 11 pierced with large orifices 12.
  • the tube 6 and the tube 9 define an annular volume V1 constituting the blowing volume of the arc.
  • This volume is closed, on the side opposite to the nozzle 10, by a first piston 14, fixed, made of insulating material and maintained by a tube 15, coaxial with the tube 9 and connected to a second socket, not shown, of the circuit breaker.
  • the piston 14 is pierced with orifices 16 which can be closed off by a washer 17 constituting a differential valve.
  • the seal between the piston 14 and the tube 9 is obtained by means of a sliding annular seal 18.
  • the tubes 15 and 6 delimit, to the right of the piston 14, a volume V2 of annular section, in which the secondary contacts are placed.
  • This volume is closed by a second piston 20, made of insulating material, integral with the tube 6.
  • This piston can slide in leaktight fashion along the tube 15 thanks to a dynamic seal 21.
  • the piston 20 is pierced with orifices 21A which can be closed off by a washer 22 forming a valve.
  • a first secondary contact closest to the blowing nozzle when the circuit breaker is in the open position (position in FIG. 3), consists of a tube 23, integral with the first piston 14 and therefore of the fixed assembly.
  • This tube of axis xx, is terminated by a wear part 23A.
  • This tube is electrically connected to the tube 15, for example by a metal crown 23B pierced with holes in the extension of the holes 16.
  • the other secondary contact is a tube 24, terminated by a wearing part 24A.
  • This tube coaxial with tube 23, and of smaller diameter than the latter in order to be able to engage therein in the engaged position of the circuit breaker, is fixed to an annular metal block 25 which can slide freely around the tube 6. Sliding electrical contacts 26 allow a electrical contact between the tube 6 and the part 25.
  • a spring 27 is disposed between the block 25 and the fixed piston 14; it is compressed when the circuit breaker is in the on position.
  • the stroke of the block 25 is limited by a stop 28, forming an integral part of a tube 29 of insulating material which can slide along the tube 6 and which sheaths the latter 6 over part of its length; the role of the tube 29 will be explained later.
  • Contact 24 is extended by a tube 24B made of insulating material (for example polytetrafluoroethylene), the role of which will appear below.
  • insulating material for example polytetrafluoroethylene
  • the assembly constituted by the block 25, the contact 24, the tube 29 and the contacts 26 can be qualified as semi-mobile since it can carry out, with respect to the mobile assembly, displacements of limited amplitude.
  • another type of shock absorber can be used, for example a pneumatic shock absorber.
  • the operating rod is moved, by the operating mechanism not shown, to the right of the figure.
  • the main contacts 3 and 9A separate, and the current, switched to the arcing contacts, then passes through the tube 5, the tube 6, the contacts 26, the block 24, the secondary contact 23, the crown 23B and the tube 15.
  • the secondary contact 24 comes to a standstill, the stop 28 coming into contact with the piston 14 via the shock absorber 30.
  • the length of the secondary arc is limited, so that there is no fear of excessive heating of the gas of the volume V2, or deterioration of the parts delimiting this volume, by vagrancy of the secondary arc.
  • the arc 50 is extinguished by the vigorous blowing coming from the volume V1 through the blowing nozzle 10.
  • the various elements of the circuit breaker can be sized so that the main 50 and secondary 51 arcs appear at about the same time.
  • the circuit breaker is of compact construction and its maintenance is easy. It finds applications in medium and high voltage networks.

Landscapes

  • Circuit Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Electronic Switches (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Organic Insulating Materials (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (4)

  1. Trennschalter für Mittel- und Hochspannung mit Isolierung durch ein dielektrisches Gas und mit automatischem Ausblasen des Lichtbogens, der im Inneren einer dichten isolierenden Hülle (1) enthält:
    - eine ortsfeste Einheit, die insbesondere einen festen Hauptkontakt (3) und einen festen Lichtbogenkontakt (5, 5A) aufweist,
    - eine bewegliche Einheit, die von einer Betätigungsstange bewegt wird und insbesondere einen beweglichen Hauptkontakt (9, 9A) und einen beweglichen Lichtbogenkontakt (6, 6A) aufweist,
    - ein erstes Blasvolumen (V1), das von einer Blasdüse (10) verlängert wird,
    - einen Blaskolben (14),
    - einen ersten (23, 23A) und einen zweiten Sekundärkontakt (24, 24A), die in einem zweiten Volumen (V2) angeordnet sind und einen Sekundärlichtbogen erzeugen sollen, wobei der erste Sekundärkontakt (23, 23A) fest ist in Bezug auf die feste Einheit, während der zweite Sekundärkontakt (24, 24A) halbbeweglich in Bezug auf die bewegliche Einheit ist und eine eigene Energiequelle (27) für seine Verschiebung bei einem Trennmanöver des Trennschalters besitzt und mit einem Mittel (28) versehen ist, um ihm einen kürzeren Hub als der beweglichen Einheit zu verleihen, dadurch gekennzeichnet, daß der zweite Sekundärkontakt (24, 24A) elektrisch mit dem Lichtbogenkontakt (6A) über einen metallischen Träger (25) verbunden ist, der entlang der beweglichen Einheit (6, 9) gleitet.
  2. Trennschalter nach Anspruch 1, dadurch gekennzeichnet, daß der zweite Sekundärkontakt (24, 24A) derjenige ist, der sich in offener Stellung des Trennschalters am weitesten von der Blasdüse (10) entfernt befindet.
  3. Trennschalter nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß die Energiequelle eine Feder (27) ist, die bei einem Einschaltmanöver des Trennschalters komprimiert wird.
  4. Trennschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Mittel zur Begrenzung des Hubs des zweiten Sekundärkontakts ein Anschlag (28) ist, der mit dem festen Kolben (14) in Berührung tritt.
EP90112672A 1989-07-04 1990-07-03 Hoch- oder Mittelspannungslastschalter Expired - Lifetime EP0406794B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908975A FR2649531B1 (fr) 1989-07-04 1989-07-04 Disjoncteur a haute ou moyenne tension
FR8908975 1989-07-04

Publications (2)

Publication Number Publication Date
EP0406794A1 EP0406794A1 (de) 1991-01-09
EP0406794B1 true EP0406794B1 (de) 1995-06-28

Family

ID=9383452

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90112672A Expired - Lifetime EP0406794B1 (de) 1989-07-04 1990-07-03 Hoch- oder Mittelspannungslastschalter

Country Status (11)

Country Link
US (1) US4996399A (de)
EP (1) EP0406794B1 (de)
JP (1) JP2577116B2 (de)
CN (1) CN1018404B (de)
AT (1) ATE124568T1 (de)
BR (1) BR9003160A (de)
CA (1) CA2020281C (de)
DE (1) DE69020441T2 (de)
DK (1) DK0406794T3 (de)
ES (1) ES2074103T3 (de)
FR (1) FR2649531B1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661550B1 (fr) * 1990-04-26 1992-06-12 Alsthom Gec Disjoncteur a haute tension a arc serie.
FR2720188B1 (fr) * 1994-05-19 1996-06-14 Gec Alsthom T & D Sa Disjoncteur à autocompression réduite.
FR2725844B1 (fr) * 1994-10-12 1996-12-13 Schneider Electric Sa Appareillage electrique a haute tension et a isolement gazeux equipe d'un dispositif court-circuiteur d'arc
CA2208217A1 (en) * 1994-12-08 1996-06-13 Exxon Chemical Patents, Inc. Biodegradable branched synthetic ester base stocks and lubricants formed therefrom
FI111711B (fi) * 1997-04-11 2003-09-15 Fortum Oil & Gas Oy Etenkin fluorattujen jäähdytysnesteiden kanssa käytettävät polyoli- ja kompleksiesterit
FR2783088B1 (fr) * 1998-09-09 2000-10-13 Alstom Technology Interrupteur avec un systeme d'insertion d'une resistance a longue duree d'insertion
FR2783348B1 (fr) * 1998-09-15 2000-10-13 Alstom Technology Methode de discrimination entre un arc interne et un arc de coupure dans un disjoncteur de moyenne ou de haute tension

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2666118A (en) * 1950-06-29 1954-01-12 Westinghouse Electric Corp Circuit interrupter
DE2403300A1 (de) * 1974-01-24 1975-07-31 Bbc Brown Boveri & Cie Elektrischer schalter
FR2575595B1 (fr) * 1985-01-02 1987-01-30 Alsthom Atlantique Disjoncteur a haute tension a gaz comprime
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

Also Published As

Publication number Publication date
CA2020281A1 (fr) 1991-01-05
CA2020281C (fr) 1994-02-01
JP2577116B2 (ja) 1997-01-29
CN1018404B (zh) 1992-09-23
EP0406794A1 (de) 1991-01-09
FR2649531A1 (fr) 1991-01-11
DK0406794T3 (da) 1995-10-02
US4996399A (en) 1991-02-26
DE69020441T2 (de) 1995-11-16
BR9003160A (pt) 1991-08-27
JPH0343924A (ja) 1991-02-25
FR2649531B1 (fr) 1995-11-10
DE69020441D1 (de) 1995-08-03
ATE124568T1 (de) 1995-07-15
CN1048628A (zh) 1991-01-16
ES2074103T3 (es) 1995-09-01

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