EP0412479B1 - Mittelspannungsschalter - Google Patents

Mittelspannungsschalter Download PDF

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Publication number
EP0412479B1
EP0412479B1 EP90115069A EP90115069A EP0412479B1 EP 0412479 B1 EP0412479 B1 EP 0412479B1 EP 90115069 A EP90115069 A EP 90115069A EP 90115069 A EP90115069 A EP 90115069A EP 0412479 B1 EP0412479 B1 EP 0412479B1
Authority
EP
European Patent Office
Prior art keywords
contact
contacts
circuit breaker
moving
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
EP90115069A
Other languages
English (en)
French (fr)
Other versions
EP0412479A1 (de
Inventor
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 EP0412479A1 publication Critical patent/EP0412479A1/de
Application granted granted Critical
Publication of EP0412479B1 publication Critical patent/EP0412479B1/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
    • H01H33/91—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • 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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches

Definitions

  • the present invention relates to a medium-voltage circuit breaker, in which the electrical insulation is ensured by a gas with good dielectric properties such as sulfur hexafluoride SF6.
  • the invention relates more particularly to a circuit breaker in which a current of high intensity (several thousand amperes) flows.
  • This type of circuit breaker is found in power plants, at the output of the alternator and upstream of the electrical voltage transformer.
  • the document EP 0 011 542 describes a medium-voltage switching device comprising an envelope made of insulating material filled with gases having good dielectric properties, first contacts connected to a first socket and second contacts connected to a second socket, a fixed arcing contact connected to the first socket and a movable arcing contact connected to an operating member, and a permanent movable contact establishing, when the circuit breaker is in the engaged position, a connection between the first and second contacts .
  • the permanent movable contact through which the permanent current passes, is most often a copper tube of relatively high mass which, when tripped, is driven with the arcing contact, at high speed. .
  • the energy necessary for this maneuver is important since it is proportional to the product of the mass of the moving assembly by the square of the speed of movement of this crew. All manufacturers seek to reduce this operating energy, because its importance penalizes the cost price of the control of the switching device.
  • a first object of the invention is to provide a circuit breaker in which the mass of the movable assembly is reduced, so as to correlatively reduce the energy required for the tripping operation.
  • Another object of the invention is to develop a circuit breaker in which the permanent current does not pass through sliding contacts, so that savings are made on the price of the device.
  • circuit breaker as defined in claim 1 attached.
  • secondary claims as regards examples of preferred embodiments, reference is made to the secondary claims.
  • the reference 1 designates an insulating, leaktight envelope, preferably cylindrical, provided with a bottom 1A and filled with a gas with good dielectric properties such as sulfur hexafluoride SF6, under a pressure of 1 to several bars.
  • a gas with good dielectric properties such as sulfur hexafluoride SF6, under a pressure of 1 to several bars.
  • a first socket 2 connected upstream in the circuit to be protected, crosses the casing 1 in a sealed manner by means of a seal 3; the socket 2 extends inside the envelope, on the one hand by a ring of fingers 4, on the other hand by a contact 5 arranged along the geometric axis 6 of the envelope.
  • the fingers 4 are arranged in the vicinity of the wall of the envelope, parallel to the axis 6, and occupy an arc of a circle of approximately 120 degrees, the plane of this circle being perpendicular to the axis 6.
  • Contact 5 is a metal rod terminated by an end 5A of an alloy resistant to the effects of an electric arc, for example a tungsten-based alloy.
  • a second socket 10 connected downstream in the circuit to be protected, crosses the envelope in a sealed manner thanks to a seal 11, and is extended inside the envelope 1 by a cylindrical portion 12 carrying studs contact 13 arranged in an arc a ′ whose plane is perpendicular to the axis 6, so that the studs 13 are opposite the ends of the fingers 4.
  • the circular arc a ′ according to which the studs 13 are arranged is preferably of the same length as the arc has the fingers 4 and we will see further how to determine an upper limit of its length.
  • the fixed assembly of the circuit breaker is completed by a blowing cylinder 14, made of insulating material, coaxial with the axis 6, fixed to the wall by lugs 15, and the bottom 16 of which has an opening for the passage of an element of the moving crew.
  • the mobile assembly comprises a metal tube 20, engaging in the aforementioned opening of the bottom 16 and fixed, by a first end, to an operating rod 21 made of insulating material.
  • the connecting rod 21 is articulated to a crank 22 rotated by a shaft 23 which passes through the wall 1 and which is connected outside of this envelope to an operating device, not shown.
  • the second end of the tube 20 carries a ring of contact fingers 25 constituting the movable arcing contact and cooperating with the fixed arcing contact 5.
  • the tube 20 carries a blowing piston 26 sliding inside the blowing cylinder 14 and provided with calibrated openings 27.
  • blowing nozzle 28 made of insulating material such as polytetrafluoroethylene known under the registered trademark Teflon.
  • the permanent movable contact consists of a copper tube 30, of diameter chosen to cooperate, when the circuit breaker is in the engaged position (FIGS. 1 and 2), with the fingers 4 and the studs 13.
  • This tube 30 is made integral with the tube 20 by metal arms 31; a metal braid 32 connects an arm 31 to the upstream socket 10-12.
  • the circuit breaker works as follows: in the engaged position, the current flows through the upstream outlet 2, the fingers 4, the tube 30, the fingers 13 and the downstream outlet 10.
  • the control produces a rotational movement at the shaft 23, which is transformed by the crank 22 and the connecting rod 21 into a translational movement of the tube 20 towards the bottom of FIG. 1.
  • the contact 30 leaves the fingers 4 and the studs 13 and the current then switches on the rod 5 and the fingers 25; the movement continuing, the fingers 25 leave the rod 5 and an arc 40 lights up (FIG. 3).
  • the gas from cylinder 14 is compressed, escapes through the openings 27 and passes through the nozzle 28, blowing out the arc which extinguishes on the first zero current crossing.
  • the moving assembly is very light and requires, all other things being equal, only a reduced operating energy. It is also observed that the permanent current crosses only one set of contacts, the design of the device allowing the absence of any sliding contact.
  • Arc a and arc a ′ are chosen to ensure voltage withstand when the circuit breaker is in the tripped position.
  • a minimum isolation distance 1 between the end fingers 4 and the studs 13 at the ends must be respected (FIG. 2).
  • a minimum isolation distance must be maintained between the piston 26 or the tube 30, at the potential of the downstream outlet, and the fingers 4 at the potential of the upstream outlet.
  • the braid 32 is used for the passage of the current only during the operation of the circuit breaker, when the tube 30 has left the pads 4 and 13; the current then passes by elements 5A, 25, 20, 31 and the braid 32 connected to the socket 10.
  • the invention finds application in the production of circuit breakers with a nominal voltage less than or equal to 45 kV, and in particular, plant circuit breakers.

Landscapes

  • Circuit Breakers (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Seal Device For Vehicle (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Control Of Eletrric Generators (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Claims (5)

  1. Mittelspannungsschalter mit einer Hülle (1) aus isolierendem Material, in der sich ein Gas mit guten dielektrischen Eigenschaften befindet und in der angeordnet sind:
    - erste Kontakte (4), die mit einem ersten Stromanschluß (2) verbunden sind, und zweite Kontakte (13), die mit einem zweiten Stromanschluß (10) verbunden sind.
    - ein erster Lichtbogenkontakt (5, 54), der mit dem ersten Stromanschluß verbunden ist, und ein beweglicher Lichtbogenkontakt (25, 55), der an einer Antriebsstange (21) befestigt ist, die mechanisch mit einem Betätigungsglied verbunden und elektrisch an den zweiten Stromanschluß angeschlossen ist, und
    - ein beweglicher Dauerkontakt (30), der fest mit dem beweglichen Lichtbogenkontakt (25, 55) verbunden ist und eine Verbindung zwischen dem ersten (4) und dem zweiten Kontakt (13) bildet, wenn sich der Schalter in der eingeschalteten Stellung befindet, dadurch gekennzeichnet, daß der bewegliche Dauerkontakt ein rohrförmiges Teil (30) geringer Länge in Richtung von dessen Verschiebung ist, derart, daß der Durchgang des elektrischen Stroms dort vor dem Auftreten des Lichtbogens während der Öffnungsbewegung unterbrochen wird, wobei der erste und der zweite Kontakt entlang je eines Kreisbogens angeordnet sind und die beiden Kreisbögen auf dem gleichen Kreis in einem gegenseitigen Abstand angeordnet sind.
  2. Schalter nach Anspruch 1, dadurch gekennzeichnet, daß die Längen (a, a′) der Bögen des ersten (4) und des zweiten Kontakts (13) jeweils nahe bei 120° liegen.
  3. Schalter nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß der bewegliche Dauerkontakt mit dem zweiten Anschluß (10) durch ein metallisches Flechtband (32) verbunden ist.
  4. Schalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß er einen Zylinder (20) und einen Blaskolben (26) aufweist, der einen Gasstrahl auf die Lichtbogenzone richtet.
  5. Schalter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der feste Lichtbogenkontakt (54) und der bewegliche Lichtbogenkontakt (55) Teil eines dichten Gefäßes sind, das einerseits mit dem ersten Anschluß (2) und andererseits mit dem beweglichen Dauerkontakt (30) verbunden ist.
EP90115069A 1989-08-09 1990-08-06 Mittelspannungsschalter Expired - Lifetime EP0412479B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8910726A FR2650911B1 (fr) 1989-08-09 1989-08-09 Disjoncteur a moyenne tension
FR8910726 1989-08-09

Publications (2)

Publication Number Publication Date
EP0412479A1 EP0412479A1 (de) 1991-02-13
EP0412479B1 true EP0412479B1 (de) 1994-11-30

Family

ID=9384610

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90115069A Expired - Lifetime EP0412479B1 (de) 1989-08-09 1990-08-06 Mittelspannungsschalter

Country Status (12)

Country Link
US (1) US5151565A (de)
EP (1) EP0412479B1 (de)
JP (1) JP2568303B2 (de)
CN (1) CN1022715C (de)
AT (1) ATE114867T1 (de)
BR (1) BR9003867A (de)
CA (1) CA2023033C (de)
DE (1) DE69014473T2 (de)
DK (1) DK0412479T3 (de)
ES (1) ES2067603T3 (de)
FR (1) FR2650911B1 (de)
GR (1) GR3015152T3 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2676588B1 (fr) * 1991-05-16 1993-07-23 Alsthom Gec Disjoncteur a moyenne tension.
US5661280A (en) * 1995-08-02 1997-08-26 Abb Power T&D Company Inc. Combination of a gas-filled interrupter and oil-filled transformer
DE19613568A1 (de) * 1996-04-04 1997-10-09 Asea Brown Boveri Leistungsschalter
FR2763171B1 (fr) * 1997-05-07 1999-07-09 Gec Alsthom T & D Sa Disjoncteur avec sectionneur
FR2763422B1 (fr) * 1997-05-15 1999-07-09 Gec Alsthom T & D Sa Disjoncteur de generateur
DE19826202C2 (de) * 1998-06-10 2000-12-14 Siemens Ag Isolierendes Bauteil für Hochspannungsanlagen und Verfahren zu seiner Herstellung
IT1309626B1 (it) * 1999-11-03 2002-01-30 Vei Electric Systems Spa Dispositivo di sezionamento e interruzione, per cabine elettriche.
ITMI20062161A1 (it) * 2006-11-10 2008-05-11 Vei Power Distrib S P A Apparecchiature tripolare per uno scomparto in media o alta tensione e relativo scomparto comprendente tale apparecchiatura tripolare
WO2014170528A1 (en) * 2013-04-15 2014-10-23 Abb Oy Electric switch assembly
FR3034281B1 (fr) * 2015-03-27 2017-04-28 Schneider Electric Ind Sas Procede de realisation d'un appareillage electrique et appareillage electrique a etancheite amelioree

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1412478A (fr) * 1964-08-01 1965-10-01 Merlin Gerin Dispositif d'extinction d'arc comprenant une enceinte fermée remplie d'un gaz comprimé
US3399286A (en) * 1966-03-07 1968-08-27 Powerdyne Inc High voltage electric swtich
US3408468A (en) * 1966-10-28 1968-10-29 Ite Circuit Breaker Ltd Differential pressure actuated switch utilizing high speed latch and lost motion means
US3555225A (en) * 1967-09-25 1971-01-12 Westinghouse Electric Corp Fluid-flow circuit interrupter with arc-assisted piston action
US4123636A (en) * 1975-12-31 1978-10-31 Westinghouse Electric Corp. Double-flow puffer-type single-pressure compressed-gas circuit-interrupter
US4139753A (en) * 1976-09-21 1979-02-13 Westinghouse Electric Corp. Puffer-type compressed-gas circuit-interrupter having improved separable contact structure
DE2809193A1 (de) * 1978-03-03 1979-09-06 Pfisterer Elektrotech Karl Niederspannungsschalter
IT8420810V0 (it) * 1984-02-10 1984-02-10 Sace Spa Sistema di contatti d'arco per interruttori elettrici, particolarmente a fluido d'estinzione dell'arco.
DE3407858A1 (de) * 1984-02-29 1984-08-02 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka Elektrischer vakuumschalter
US4563556A (en) * 1984-03-28 1986-01-07 Michel Goldstein Internal combustion circuit breaker
JPH0618099B2 (ja) * 1984-09-20 1994-03-09 三菱電機株式会社 遮断器
FR2596915B1 (fr) * 1986-04-03 1994-02-18 Merlin Et Gerin Disjoncteur electrique a autosoufflage ayant une tenue dielectrique elevee
DE3636922C2 (de) * 1986-10-30 1994-08-11 Calor Emag Elektrizitaets Ag Brückenlasttrennschalter

Also Published As

Publication number Publication date
JP2568303B2 (ja) 1997-01-08
DE69014473D1 (de) 1995-01-12
ES2067603T3 (es) 1995-04-01
JPH0377227A (ja) 1991-04-02
CN1049425A (zh) 1991-02-20
DE69014473T2 (de) 1995-04-20
DK0412479T3 (da) 1995-02-27
CA2023033C (fr) 1994-02-08
FR2650911B1 (fr) 1991-10-04
ATE114867T1 (de) 1994-12-15
GR3015152T3 (en) 1995-05-31
CA2023033A1 (fr) 1991-02-10
CN1022715C (zh) 1993-11-10
BR9003867A (pt) 1991-09-03
FR2650911A1 (fr) 1991-02-15
EP0412479A1 (de) 1991-02-13
US5151565A (en) 1992-09-29

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