EP0359224B1 - Hochspannungsschalter mit gasförmigem Dielektrikum zum Beblasen - Google Patents

Hochspannungsschalter mit gasförmigem Dielektrikum zum Beblasen Download PDF

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Publication number
EP0359224B1
EP0359224B1 EP89116944A EP89116944A EP0359224B1 EP 0359224 B1 EP0359224 B1 EP 0359224B1 EP 89116944 A EP89116944 A EP 89116944A EP 89116944 A EP89116944 A EP 89116944A EP 0359224 B1 EP0359224 B1 EP 0359224B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
contact
circuit breaker
piston
fixed
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
EP89116944A
Other languages
English (en)
French (fr)
Other versions
EP0359224A1 (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
Priority to AT89116944T priority Critical patent/ATE98811T1/de
Publication of EP0359224A1 publication Critical patent/EP0359224A1/de
Application granted granted Critical
Publication of EP0359224B1 publication Critical patent/EP0359224B1/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
    • H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted
    • 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 high voltage circuit breaker in which the breaking chamber is filled with dielectric gas, such as sulfur hexafluoride, and in which the energy of the arc is used, thanks to the increase in pressure it gives to gas, to reduce the energy required for cutting.
  • dielectric gas such as sulfur hexafluoride
  • the invention relates more particularly to a circuit breaker having a blowing cylinder and a second chamber in which an additional pair of contacts is capable of generating, when the circuit breaker is opened, a secondary arc used to help provide energy for the opening maneuver
  • a circuit breaker is known, for example, from French Patent No. 2,610,763.
  • a problem to be solved in this type of circuit breaker is that the pressure remains low in the blowing cylinder for breaking small currents (low operating energy) and that the pressure is high for breaking large currents without increasing the maneuvering energy.
  • the subject of the invention is a high-voltage circuit breaker with pressurized dielectric gas, of the type comprising at least one breaking chamber comprising an insulating envelope filled with said gas inside which are placed a fixed assembly comprising a fixed main contact and a fixed arcing contact, a movable assembly comprising in particular a movable main contact and a movable arcing contact, the breaking chamber further comprising a blowing cylinder opening into a blowing nozzle and a pair of secondary contacts, characterized in that said blowing cylinder is delimited by a first cylinder constituting the movable arcing contact, a second cylinder constituting the movable main contact and a first piston sliding between said first and said second cylinder, said first piston being returned by a spring abutting against a part secured to the fixed assembly, the first cylinder constituting the movable arcing contact and a tube linked to the fixed assembly and coaxial with the aforementioned second cylinder delimiting, on the other side of the piston closing the blowing cylinder
  • FIG. 1 shows a breaking chamber comprising a casing 1, made of an insulating material such as ceramic, filled with a dielectric gas such as sulfur hexafluoride under a pressure of a few bars.
  • a breaking chamber comprising a casing 1, made of an insulating material such as ceramic, filled with a dielectric gas such as sulfur hexafluoride under a pressure of a few bars.
  • a dielectric gas such as sulfur hexafluoride under a pressure of a few bars.
  • the movable assembly comprises a metal cylinder or tube 5, serving as a movable arcing contact, terminated by a tip 5A made of an alloy resistant to the effects of the arcing.
  • the cylinder 5 is driven by a metal tube 6, for example made of aluminum, fixed to an operating rod, not shown. Tubes 5 and 6 are not attached to each other; on the contrary, a certain travel between them is possible; the drive is done by two steps 5B and 6B of the tubes 5 and 6. The travel is limited by a stop 6C.
  • a metal tube 7, concentric with the cylinder 5, serves as a movable main contact.
  • blowing nozzle 8 made of insulating material. It is in electrical contact with a metal block 9 made of aluminum for example, secured to the fixed assembly, by contact fingers 10.
  • the cylinder 5 and the tube 7 are joined by an insulating ring 12, pierced with holes 12A.
  • the volume 20 delimited by the tubes 5 and 7 is closed by a piston 14, made of an insulating material, for example polytetrafluoroethylene.
  • the piston 14 is made semi-mobile relative to the fixed assembly. To this end, the piston 14 is integral with a portion of cylinder 15 terminated by a step 15A, which can slide along the inner wall of cylinder 7.
  • the stroke of the cylinder is limited by a stop on one end 16A forming a step of a cylinder 16 fixed to the block 9.
  • the piston 14 optionally comprises a valve 14A allowing the passage of gas only from the inside to the outside of the volume 20.
  • the piston 14 comprises a seal 18 and a guide 19.
  • the insulating block is guided in the annular space between the tubes 5 and 16 thanks to a portion 32A coming to bear against the tube 16.
  • This portion is provided with orifices 33 to allow the free passage of gas in the annular space 35 between the tube 16 and exhibits 31 and 32.
  • the insulating part 32 is provided with a latching system, for example with balls 36 and springs 37, cooperating with grooves 38 and 39 formed in the tube 5.
  • a stop 40 of the tube 16 limits the travel of the parts 31 and 32 .
  • the annular space 35 is closed by an insulating piston 42, fixed to the tube 5 and having a guide segment 43 and a valve 44 allowing the passage of gas only from the outside to the inside of the volume 35.
  • the tube 5 has holes 46 at its end.
  • the tube 6 has holes 47.
  • the part 9 carries a contact 48 cooperating with one end 49 of the tube 5 to place the tube 5 at the same potential as the rest of the moving assembly at the end of the opening stroke.
  • the circuit breaker works as follows: When the circuit breaker is closed (position in FIG. 1), the current flows through the fingers 2, the tube 7, the fingers 10 and the part 9.
  • the vacuum generated in the volume 35 causes the valve 44 to open and the pressure in the volume 35 to be maintained. There is therefore no loss of pneumatic energy by suction.
  • the arc 60 which is established between the contacts 30 and 31 either at the same time as the arc 50, either slightly before or slightly after, creates an overpressure sufficiently low to not move the piston 14 relative to the stop 16A.
  • the part 32A After a certain stroke, the part 32A abuts on the stop 40.
  • the tube 5 continuing its stroke, the balls 36 leave the groove 39 and come to be positioned on the groove 38 (FIG. 3) at the end of the opening maneuver.
  • the contact 48 puts the end 49 of the tube 5, and therefore the contact 31, at the potential of the part 9, of the tube 16 and therefore of the contact 30.
  • the tube 6 is actuated to the left of the figure.
  • the stop 6C drives the tube 5 and the contacts 30 and 31 come into contact, without creating an arc since they are at the same potential thanks to the contact of the parts 48 and 49.
  • the slight overpressure in the volume 35 is evacuated, by the holes 46 and 47 which coincide, towards the volume 70 inside the tube 5.
  • Figure 4 shows the circuit breaker being opened by moving the tube 6 to the right of the figure.
  • the arc 60 causes rapid heating of the volume 35 and of the volume 35B surrounded by the contacts 30, 31, the piston 22 and the cylinder 5.
  • the compression of the volume 20 then results not only from the displacement of the piston due to the movement of the movable assembly of the breaking chamber, but also from the relative displacement of the piston 14 relative to the movable assembly.
  • the overpressure in the volume 35 causes the valves 14A and 44 to close.
  • a second effect of the increase in pressure in volumes 35 and 35B is to exert a force on the insulating piston 42 and thus to make a contribution to the operating energy.
  • the hot gas of volume 35 passes through the orifices 33 of the part 32A.
  • the circuit breaker of the invention requires only a low operating energy for all the current values to be cut. For short-circuit currents, the blowing action is extremely energetic.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Burglar Alarm Systems (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Organic Insulating Materials (AREA)

Claims (7)

  1. Mit einem dielektrischen Gas unter Druck gefüllter Hochspannungs-Trennschalter mit mindestens einer Trennkammer, die eine mit dem Gas gefüllte isolierende Hülle (1) aufweist, in der eine ortsfeste Einheit mit einem ortsfesten Hauptkontakt (2) und einen ortsfesten Lichtbogenkontakt (4) und eine bewegliche Einheit mit insbesondere einem beweglichen Hauptkontakt (7) und einen beweglichen Lichtbogenkontakt (5) angeordnet sind, wobei die Trennkammer weiter einen in die Blasdüse (8) mündenden Blaszylinder (20) und ein Paar Sekundärkontakte (30, 31) aufweist, dadurch gekennzeichnet, daß der Blaszylinder begrenzt wird durch einen ersten Zylinder (5), der den beweglichen Lichtbogenkontakt bildet, einen zweiten Zylinder (7), der den beweglichen Hauptkontakt bildet, und einen ersten Kolben (14), der zwischen dem ersten und dem zweiten Zylinder gleitet, wobei der erste Kolben durch eine Feder (17) vorgespannt wird, die gegen ein mit der ortsfesten Einheit fest verbundenes Teil (16A) anliegt, wobei der erste Zylinder (5) den beweglichen Lichtbogenkontakt bildet und ein Rohr (16), das mit der ortsfesten Einheit verbunden und koaxial zum zweiten Zylinder angeordnet ist, an der anderen Seite des Kolbens (14), der den Blaszylinder verschließt, ein veränderliches Volumen (35, 35B) begrenzt, das einerseits durch den ersten Kolben (14) und andererseits durch einen ringförmigen Endkolben (42) geschlossen wird, der mit dem ersten Zylinder (5) verbunden ist und entlang des Rohres (16) gleitet, wobei das Volumen die Sekundärkontakte umschließt, von denen der erste (30) mit dem Rohr (16) fest verbunden ist, während der zweite (31) vom ersten Zylinder (5) mitgenommen wird.
  2. Trennschalter nach Anspruch 1, dadurch gekennzeichnet, daß sich der zweite Sekundärkontakt (31) zwischen einer ersten und einer zweiten festen Position entlang des ersten Zylinders (5) verschieben kann, der den beweglichen Lichtbogenkontakt bildet.
  3. Trennschalter nach Anspruch 2, dadurch gekennzeichnet, daß der zweite Sekundärkontakt (31) mit einer Raste (36, 37) versehen ist, die mit Kehlen (38, 39), die in den den beweglichen Lichtbogenkontakt bildenden ersten Zylinder (5) eingearbeitet sind, zusammenwirkt, um den zweiten Sekundärkontakt in den festen Positionen zu blockieren.
  4. Trennschalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die ortsfeste Einheit einen Kontakt (48) trägt, der in Berührung mit dem den beweglichen Lichtbogenkontakt bildenden ersten Zylinder (5) gelangt, wenn der Trennschalter geöffnet ist.
  5. Trennschalter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Blaszylinder (20) ein Ventil (14A) aufweist, das den Durchtritt des Gases nur vom Inneren des Zylinders nach außen erlaubt.
  6. Trennschalter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der ringförmige Endkolben (42) ein Ventil (44) aufweist, das den Durchtritt des Gases nur von außen in das Innere des die Sekundärkontakte (30, 31) enthaltenden Raumes (35, 35B) erlaubt.
  7. Trennschalter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der erste, den beweglichen Lichtbogenkontakt bildende Zylinder (5) mit einem Mitnehmerrohr (6), unter Belassung eines gewissen Spiels, verbunden ist, derart, daß beim Schließen des Trennschalters Löcher (46), die in den den beweglichen Lichtbogenkontakt bildenden Zylinder eingearbeitet sind, mit Löchern (47), die in das Mitnehmerrohr (6) eingearbeitet sind, zur Deckung gebracht werden, um den Überdruck des die Sekundärkontakte (30, 31) enthaltenden Raumes (35) abzubauen.
EP89116944A 1988-09-16 1989-09-13 Hochspannungsschalter mit gasförmigem Dielektrikum zum Beblasen Expired - Lifetime EP0359224B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89116944T ATE98811T1 (de) 1988-09-16 1989-09-13 Hochspannungsschalter mit gasfoermigem dielektrikum zum beblasen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812115 1988-09-16
FR8812115A FR2639147B1 (fr) 1988-09-16 1988-09-16 Disjoncteur a haute tension a gaz dielectrique utilise pour le soufflage

Publications (2)

Publication Number Publication Date
EP0359224A1 EP0359224A1 (de) 1990-03-21
EP0359224B1 true EP0359224B1 (de) 1993-12-15

Family

ID=9370074

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89116944A Expired - Lifetime EP0359224B1 (de) 1988-09-16 1989-09-13 Hochspannungsschalter mit gasförmigem Dielektrikum zum Beblasen

Country Status (10)

Country Link
US (1) US4945197A (de)
EP (1) EP0359224B1 (de)
JP (1) JP2837188B2 (de)
CN (1) CN1018683B (de)
AT (1) ATE98811T1 (de)
BR (1) BR8904656A (de)
CA (1) CA1317619C (de)
DE (1) DE68911440T2 (de)
ES (1) ES2047078T3 (de)
FR (1) FR2639147B1 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647255B1 (fr) * 1989-05-17 1993-04-23 Alsthom Gec Disjoncteur a haute tension a gaz dielectrique de soufflage
FR2647949B1 (fr) * 1989-05-31 1994-02-18 Gec Alsthom Sa Disjoncteur a haute tension a gaz dielectrique de soufflage
FR2661549B1 (fr) * 1990-04-25 1996-07-19 Alsthom Gec Disjoncteur a moyenne ou haute tension a contacts d'arc en bout.
DE4041702C1 (de) * 1990-12-24 1992-04-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt, De
FR2715499B1 (fr) * 1994-01-25 1996-03-15 Gec Alsthom T & D Sa Disjoncteur à auto-soufflage à piston semi-mobile verrouillé pneumatiquement.
FR2756413B1 (fr) * 1996-11-28 1998-12-31 Gec Alsthom T & D Sa Disjoncteur a piston semi-mobile
EP1973133A3 (de) * 2007-03-22 2009-11-11 Korea Electro Technology Research Institute Trennschalter unter Verwendung eines Kontaktbogens
FR2922043B1 (fr) * 2007-10-03 2009-12-11 Areva T & D Sa Chambre de coupure de disjoncteur a double volume de compression
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
CN102592876B (zh) * 2012-03-01 2014-10-01 广东金晖隆开关有限公司 吹气灭弧负荷开关
FR3039924B1 (fr) * 2015-08-07 2019-05-10 Supergrid Institute Appareil de coupure mecanique d'un circuit electrique

Family Cites Families (4)

* 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
DE3141324C2 (de) * 1981-10-17 1986-02-06 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Leistungsschalter
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
ES2047078T3 (es) 1994-02-16
CN1018683B (zh) 1992-10-14
ATE98811T1 (de) 1994-01-15
BR8904656A (pt) 1990-04-24
DE68911440D1 (de) 1994-01-27
CN1041239A (zh) 1990-04-11
DE68911440T2 (de) 1994-04-07
JPH02121219A (ja) 1990-05-09
FR2639147A1 (fr) 1990-05-18
FR2639147B1 (fr) 1990-12-14
EP0359224A1 (de) 1990-03-21
US4945197A (en) 1990-07-31
JP2837188B2 (ja) 1998-12-14
CA1317619C (fr) 1993-05-11

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