EP0689217B1 - Vakuum Röhre, insbesondere für Lastschalter oder elektrischer Mittelspannungsschalter und Schalter mit einer solchen Röhre - Google Patents

Vakuum Röhre, insbesondere für Lastschalter oder elektrischer Mittelspannungsschalter und Schalter mit einer solchen Röhre Download PDF

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Publication number
EP0689217B1
EP0689217B1 EP95410054A EP95410054A EP0689217B1 EP 0689217 B1 EP0689217 B1 EP 0689217B1 EP 95410054 A EP95410054 A EP 95410054A EP 95410054 A EP95410054 A EP 95410054A EP 0689217 B1 EP0689217 B1 EP 0689217B1
Authority
EP
European Patent Office
Prior art keywords
contact
contacts
mentioned
switch
rod
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
EP95410054A
Other languages
English (en)
French (fr)
Other versions
EP0689217A1 (de
Inventor
Roger Bolongeat-Mobleu
Frédéric Burnaz
Hans Schellekens
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.)
Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0689217A1 publication Critical patent/EP0689217A1/de
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Publication of EP0689217B1 publication Critical patent/EP0689217B1/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
    • H01H33/60—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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6646—Contacts; Arc-extinguishing means, e.g. arcing rings having non flat disc-like contact surface
    • 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
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/125—Load break switches comprising a separate circuit breaker
    • 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
    • H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
    • H01H33/6641—Contacts; Arc-extinguishing means, e.g. arcing rings making use of a separate coil
    • 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 vacuum interrupter, in particular intended to ensure the interruption of an electrical circuit in a circuit breaker or medium voltage switch, as well as a switch incorporating such a bulb.
  • an electric vacuum interrupter switch described in the patent document French 2,655,766 of the applicant mainly comprising a watertight enclosure filled with a gas with high dielectric strength, in which is disposed a cartridge with vacuum containing a pair of arcing contacts respectively fixed and movable, a pair of main contacts electrically connected in parallel with said arcing contacts, and a control mechanism for said contacts to open the arcing contacts after the contacts and close them before the main contacts.
  • the two aforementioned arcing contacts each have a disc-shaped contact piece.
  • the fixed contact is integral with one aforementioned bottoms while the movable contact is slidably mounted in the other of the two bottom of the envelope being connected to said control mechanism ensuring the closing and separation of the contacts in order to cut the electrical circuit.
  • the present invention overcomes these drawbacks and provides a vacuum interrupter for simple design, especially for a medium electrical switch or circuit breaker tension, making it possible to obtain, by a more homogeneous distribution of the arc produced between the two arcing contacts, improved breaking capacity, while generating a cost of reduced manufacturing.
  • the present invention relates to a vacuum interrupter as described in claim 1.
  • the aforementioned first and second fixed contacts each have a disc-shaped contact part, the two parts being substantially the same diameter and placed opposite one another.
  • the second fixed contact consists mainly by two cylindrical parts, respectively upper and lower diameters different, the upper part of larger diameter forming the aforementioned contact part.
  • the above-mentioned upper part has an orifice used for guiding in translation of the aforementioned rod while the aforementioned lower part comprises a recess for housing a sealing bellows mounted around the rod
  • it comprises a ceramic envelope, of substantially cylindrical in shape and closed by two electrically connected metal bottoms to the two switch contacts.
  • it comprises a plate made of ceramic or analog, on which are fixed the second fixed contact and a cup closed by a cover to which the aforementioned first fixed contact, the cup and the cover are fixed being made of a conductive material and the two fixed contacts being connected respectively electrically at the two switch contacts.
  • the first and second fixed contacts as well as the aforementioned rod are made of a refractory material.
  • the invention also relates to an electric switch comprising an enclosure airtight filled with sulfur hexafluoride, in which is placed a vacuum interrupter comprising the described characteristics, taken alone or in combination, a pair of main contacts electrically connected in parallel with said arcing contacts, and a operating mechanism to open the arcing contacts after the main contacts and the close before the main contacts.
  • Figure 1 is a schematic view in axial section of a circuit breaker incorporating a bulb under vacuum, according to a particular embodiment of the invention.
  • Figure 2 is an axial sectional view of an alternative embodiment of the bulb under empty.
  • FIG 1 we see a vacuum interrupter 38 according to a first embodiment of the invention used in a circuit breaker.
  • the wall 12 metallic or insulating may be that of a gas-insulated installation or station, or that of one pole or of the three poles of the circuit breaker.
  • the pole shown in Figure 1 has two sealed feedthroughs 14,16 of input and output conductors 18 of the current, which terminate outside the enclosure 10 by pads 22 of connection and inside, respectively by a support 24 of a fixed main contact 26 and by a support 28 of a movable main contact 30, in the form of a knife pivotally mounted on a fixed axis 32.
  • the movable main contact 30 In the closed position, the movable main contact 30 is aligned, and at contact of the fixed main contact 26 to close the main circuit, constituted by the input conductor 18, support 24, main contacts fixed 26, and mobile 30, support 28 and the output conductor 20.
  • the supports 24,28 are extended by arms 34,36 extending transversely and framing by their free ends the cartridge to empty 38.
  • the cylindrical casing 40 of the cartridge 38 is closed in a sealed manner its two ends by metallic bottoms 42,44, each mechanically connected and electrically at the free end of the associated arm 34.36.
  • the axis of the cartridge is substantially parallel to the main contacts 26.30 aligned in the closed position and three contacts 46, 47, 48 are arranged coaxially in the cartridge 38.
  • the first 46 of these contacts is fixed and consists of a contact piece in the form of disc 51, carried by a rod 51a fixed to the upper bottom 42 of the casing 40.
  • This envelope 40 also includes a second fixed contact 47 consisting of two parts cylindrical, respectively upper 45 and lower 43, of different diameters.
  • the upper part 45 forms another disc-shaped contact part 53, the diameter corresponds to that of the first fixed contact 51, while the lower part 43 is fixed to its base, on the lower bottom 44 of said envelope 40.
  • the upper part 45 comprises a cylindrical recess 50 in which a rod 48 constituting the third contact, is mounted sliding.
  • the lower part 43 of the second fixed contact 47 comprises a recess 41 for housing a sealing bellows 49 mounted around the rod 48.
  • a rotary control shaft 52 passes through the wall 12 and carries at its internal end a crank 54, connected on the one hand by an articulated rod 56 to the main knife 30 and on the other leaves by a link 58 and a buttonhole 60 to the rod 48.
  • a buttonhole 60 formed in the link 58, is mounted to slide a pin 62 carried by the crank 54 so as to constitute a dead-stroke connection which is stressed in extension by a spring 64.
  • the mechanism is arranged so that during an operation opening of the circuit breaker, controlled by a rotation of the shaft 52 in the direction of clockwise, the movable main contact 30 opens first, the arcing contacts 46.48 remaining closed at first thanks to the dead race 60.62.
  • the current which went through the main contacts 26.30 is switched in the arc circuit without training of arcing on the main contacts 26.30.
  • Continued rotation of the shaft 52 causes the opening of the arcing contacts 46,48 and the final opening of the circuit breaker.
  • the process closing controlled by a reverse rotation of the shaft 52, first closes the arcing contacts 46,48, then the main contacts 26,30.
  • the cylindrical casing 40 of the vacuum cartridge 38 is made of ceramic or glass with a smooth outer surface, the axial length of which defines the critical line of flight of the cartridge 38. This axial length is determined as a function of the tension, to ensure holding sufficient dielectric and this length is significantly less than that of a cartridge placed in the air. At medium voltage this length is less than or close to 15 cm and the reduced size of the vacuum cartridge 38 facilitates its housing.
  • the bottom 42 of the cartridge 38 disposed on the side of the fixed contact 46 carries on its internal face to cartridge 38 a coil (not shown), coaxial with envelope 40 and connected electrically in series of arcing contacts 46, 48, said coil producing a field axial magnetic between the arcing contacts 46, 48 intended to diffuse the electric arc so to improve the breaking capacity.
  • the envelope of the bulb is constituted by a flat ceramic 70, on which is brazed a metallic cup 71 closed by a cover 72 also metallic.
  • the ceramic plate 70 has an orifice 70a on the edges of which the part is welded lower 43 of the second fixed contact 47, the shape of which corresponds to that described previously.
  • the first fixed contact 46 comprises a contact part 51, in the form of disc, and a stepped part 51b, welded to the edge of an orifice 46a formed in the abovementioned cover 72, around which a coil 73 is fixed. Note the presence of a cup 74 intended to protect the ceramic plate 70 against plasma projections during the formation of the arc.
  • one of the main contacts 26 of the circuit breaker is electrically connected, by through the arm 34, to the coil 73, while the other main contact 30 is connected electrically via the arm 36 to the second fixed contact 47 constituting one 44 bottoms of the bulb, the rod 48 being connected as before to the link 58.
  • this bulb is the same as that corresponding to the first realization of the bulb and will therefore not be described.
  • a vacuum bulb of simple design as well than a switch or circuit breaker whose breaking capacity is improved due to the more homogeneous distribution of the electric arc between the fixed contacts.
  • This bulb also has a reduced manufacturing cost because it requires a less important control because the movable contact is reduced to a simple rod.

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)

Claims (5)

  1. Vakuumschaltröhre, insbesondere für einen Mittelspannungs-Lastschalter oder -Leistungsschalter, der gattungsgemäß eine annähernd zylindrische Umhüllung (40) aufweist, die durch zwei jeweils mit einem Hauptkontakt (26, 30) des Schalters verbundene Böden (42, 44) verschlossen ist, wobei im Innenraum der Umhüllung zwei Kontakte axial angeordnet sind, von denen der eine Kontakt an einem der genannten Böden befestigt ist und der als beweglicher Kontakt ausgeführte, andere Kontakt in bezug zum anderen der beiden Böden (42, 44) verschiebbar gelagert sowie mit einem Mechanismus verbunden ist, der die Verschiebung des genannten beweglichen Kontakts zwischen einer Einschaltstellung des feststehenden und des beweglichen Kontakts und einer die Abschaltung des Stromkreises gewährleistenden Trennstellung der beiden Kontakte gewährleistet, und die genannte Schaltröhre einen, fest mit dem genannten zweiten Boden (44) verbundenen zweiten feststehenden Kontakt (47) aufweist, in dem eine den genannten beweglichen Kontakt bildende Stange (48) verschiebbar angeordnet ist, dadurch gekennzeichnet, daß sie darüber hinaus Mittel (73) zur Erzeugung eines axialen Magnetfelds in der Lichtbogenzone umfaßt, wobei die genannte Stange (48) zunächst mit dem ersten feststehenden Kontakt (46) in Berührung gebracht und anschließend erneut von diesem Kontakt (46) getrennt wird, um einen Lichtbogen zu erzeugen, der zur Abschaltung des Stromkreises durch das axiale Magnetfeld gleichförmig auf die beiden genannten feststehenden Kontakte (46, 47) verteilt wird.
  2. Vakuumschaltröhre nach Anspruch 1, dadurch gekennzeichnet, daß der genannte erste und der genannte zweite feststehende Kontakt (46, 47) jeweils einen kontaktgebenden Teil in Form einer Scheibe (51, 53) umfassen, wobei die beiden Teilen annähernd den gleichen Durchmesser aufweisen und einander gegenüberliegen.
  3. Vakuumschaltröhre nach Anspruch 2, dadurch gekennzeichnet, daß der zweite feststehende Kontakt (47) im wesentlichen aus zwei zylindrischen Abschnitten mit verschiedenen Durchmesser, und zwar einem oberen und einem unteren Abschnitt (45, 43) besteht, wobei der einen größeren Durchmesser aufweisende obere Abschnitt (45) den oben genannten kontaktgebenden Teil (53) bildet.
  4. Vakuumschaltröhre nach Anspruch 3, dadurch gekennzeichnet, daß im genannten oberen Abschnitt (45) eine Öffnung (50) ausgebildet ist, die dazu dient, die genannte Stange (48) bei ihrer Translationsbewegung zu führen, während der genannte untere Abschnitt (43) eine Ausnehmung (41) zur Aufnahme eines um die Stange (48) geführten Dichtungsbalgs (49) aufweist.
  5. Vakuumschaltröhre nach irgendeinem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sie eine annähernd zylindrische Keramikumhüllung (40) aufweist, die durch zwei, elektrisch mit den beiden Schalterkontakten (26, 30) verbundene Metallböden (42, 44) verschlossen ist.
EP95410054A 1994-06-20 1995-06-07 Vakuum Röhre, insbesondere für Lastschalter oder elektrischer Mittelspannungsschalter und Schalter mit einer solchen Röhre Expired - Lifetime EP0689217B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9407615 1994-06-20
FR9407615A FR2721434B1 (fr) 1994-06-20 1994-06-20 Ampoule sous vide, notamment pour disjoncteur ou interrupteur électrique moyenne tension et interrupteur intégrant une telle ampoule.

Publications (2)

Publication Number Publication Date
EP0689217A1 EP0689217A1 (de) 1995-12-27
EP0689217B1 true EP0689217B1 (de) 2001-11-07

Family

ID=9464479

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95410054A Expired - Lifetime EP0689217B1 (de) 1994-06-20 1995-06-07 Vakuum Röhre, insbesondere für Lastschalter oder elektrischer Mittelspannungsschalter und Schalter mit einer solchen Röhre

Country Status (5)

Country Link
US (1) US5591948A (de)
EP (1) EP0689217B1 (de)
JP (1) JPH0845397A (de)
DE (1) DE69523669T2 (de)
FR (1) FR2721434B1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW389919B (en) * 1995-09-27 2000-05-11 Hitachi Ltd Insulated type switching device
NL1017985C2 (nl) * 2001-05-03 2002-11-05 Holec Holland Nv Vacuümonderbreker voorzien van een coaxiale spoel voor het opwekken van een axiaal magneetveld nabij de contactorganen van de onderbreker.
DE102005002139B4 (de) * 2005-01-13 2007-01-25 Siemens Ag Dreistellungsschalter mit Kurvenscheibe
EP2169795A1 (de) * 2008-09-26 2010-03-31 Eaton Electric B.V. Schaltinstallation mit Bogenschutz und Bogenschutzverfahren
FR2970809B1 (fr) 2011-01-25 2013-02-22 Schneider Electric Ind Sas Dispositif de coupure moyenne tension comprenant une ampoule a vide
DE102012025115A1 (de) * 2012-12-21 2014-06-26 Technische Universität Braunschweig Leistungsschalter
FR3037709B1 (fr) 2015-06-22 2018-05-11 Schneider Electric Industries Sas Ampoule a vide et appareillage de protection electrique comportant une telle ampoule
CN111816500B (zh) * 2020-09-10 2020-12-15 广东电网有限责任公司东莞供电局 一种真空断路器的灭弧装置
EP4053871A1 (de) 2021-03-03 2022-09-07 ABB Schweiz AG Mittelspannungsschaltvorrichtung

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3210505A (en) * 1962-04-03 1965-10-05 Gen Electric Electrode structure for an electric circuit interrupter
US3211866A (en) * 1963-02-05 1965-10-12 Gen Electric Vacuum type electric circuit interrupter with plural parallel-connected contact points
US3489873A (en) * 1967-11-06 1970-01-13 Gen Electric Triggered vacuum type circuit interrupter
US4171474A (en) * 1977-05-27 1979-10-16 Electric Power Research Institute, Inc. Current interrupter electrode configuration
FR2655766B1 (fr) 1989-12-11 1993-09-03 Merlin Gerin Disjoncteur hybride moyenne tension.
FR2677487B1 (fr) * 1991-06-10 1993-09-03 Merlin Gerin Interrupteur electrique sous vide.
FR2682807B1 (fr) * 1991-10-17 1997-01-24 Merlin Gerin Disjoncteur electrique a deux cartouches a vide en serie.
FR2682808B1 (fr) * 1991-10-17 1997-01-24 Merlin Gerin Disjoncteur hybride a bobine de soufflage axial.

Also Published As

Publication number Publication date
DE69523669T2 (de) 2002-08-01
FR2721434A1 (fr) 1995-12-22
US5591948A (en) 1997-01-07
FR2721434B1 (fr) 1996-08-02
EP0689217A1 (de) 1995-12-27
JPH0845397A (ja) 1996-02-16
DE69523669D1 (de) 2001-12-13

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