EP0045229B1 - Interrupteur à arc tournant double - Google Patents

Interrupteur à arc tournant double Download PDF

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Publication number
EP0045229B1
EP0045229B1 EP81401079A EP81401079A EP0045229B1 EP 0045229 B1 EP0045229 B1 EP 0045229B1 EP 81401079 A EP81401079 A EP 81401079A EP 81401079 A EP81401079 A EP 81401079A EP 0045229 B1 EP0045229 B1 EP 0045229B1
Authority
EP
European Patent Office
Prior art keywords
arc
contacts
contact
coil
moving contact
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
Application number
EP81401079A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0045229A1 (fr
Inventor
Georges Bernard
Pierre Leclercq
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin 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 Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0045229A1 publication Critical patent/EP0045229A1/fr
Application granted granted Critical
Publication of EP0045229B1 publication Critical patent/EP0045229B1/fr
Expired 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • 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
    • H01H33/98—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
    • H01H33/982—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow in which the pressure-generating arc is rotated by a magnetic field

Definitions

  • the invention relates to a rotary arc switch according to the preamble of claim 1.
  • Document EP-A1-12048 describes a rotary arc switch in which one of the roots of the arc is magnetically blown in rotation on an annular electrode covering the front face of the coil. The other root follows this movement with a certain delay and the arc extinction conditions are not optimal.
  • the coil surrounds the fixed contact, limiting the space available for housing main contacts and / or cut-off gas exhaust pipes.
  • the object of the present invention is to improve the aforementioned switch, in particular to increase its voltage performance, by placing two chambers in series produced by the features of claim 1.
  • the arc drawn during the separation of the contacts is subdivided into two divisional arcs anchored on the two electrodes framing the coil, and each divisional arc is subjected to the magnetic blowing action. generated by the coil.
  • the space freed up by the coil. on the side of the fixed contact facilitates the housing of the main contacts and that of a discharge gas discharge pipe for the pneumatic blowing of the arc.
  • the document FR-A-1 014 637 relates to a low voltage switch having a stack of metal deionization plates in which the arc penetrates by dividing. On the top, the bottom and inside of this stack are arranged coils in the form of wafers which magnetically blow the arc in the stack and in rotation.
  • This switch makes use of a different principle of extinguishing the arc, in this case cooling in contact with metal plates.
  • the field lines are perpendicular to the front faces of the wafers and have a radial component only in the intermediate part between two coils, the polarities of which must moreover be opposite. Only the middle section of the arc is rotated and the coil on top of the stack does not allow the housing of main contacts.
  • the fixed and movable contacts are tubular in shape to allow gases to escape through the contacts and ensure pneumatic blowing of the arcs anchored on the contacts.
  • the enclosure is advantageously subdivided by two intermediate partitions into three chambers, the middle chamber containing the contacts and constituting a breaking chamber communicating in the position of separation of the contacts with the two adjacent expansion chambers.
  • the action of the arcs drawn between the contacts causes a thermal expansion of the gas from the breaking chamber and an exhaust towards the expansion chambers through the tubular contacts.
  • the internal diameter of the blowing coil is only slightly greater than the diameter of the tubular movable contact which passes through it in the closed position, so as to have an intense magnetic blowing field in the arc zone.
  • Opposite the annular electrodes flanking the faces of the coil are advantageously arranged annular rings of equivalent diameter associated with the fixed contact and with the movable contact so as to pick up the divisional arcs in a manner known per se.
  • a casing 10 of cylindrical shape made of an insulating material is closed in a leaktight manner at its ends by bottoms 12, 14, constituting input and output terminals of the switch.
  • the envelope 10 is filled with an electronegative gas, such as sulfur hexafluoride, under an appropriate pressure.
  • the bottom 12 is traversed in a sealed manner by a sliding rod 16 for control extended in its internal part to the casing 10 by a tubular movable contact 18 having at its end an annular contact face 20.
  • the tubular movable contact 18 is surrounded in its rear part by a tubular support 22, the end 24 of which is shaped as a support collar for a tulip contact, designated by the general reference 26.
  • the tulip contact 26 comprises in a manner well known to specialists a plurality of contact fingers 28, distributed circumferentially around the collar 24 and of the movable tubular contact 18, a spring 30 holding the ends of the contact fingers 28 in abutment with the collar 24 and a spring 32 holding the opposite ends of the contact fingers 28 in contact with the periphery of the movable tubular contact 18.
  • the contact fingers extend into an annular arc track 34 projecting from the end 20 of the movable tubular contact 18 in. retracted opening of the latter.
  • a tubular contact, called semi-fixed 36 is slidably mounted in the support 22 ', a spring 38 cooperating with the semi-fixed contact 36 to urge the latter in the projecting position, shown on the part right of the figure, in which the front face 40 of arcing contact is set back from the annular ring 34 ', the contact fingers 28' being in abutment of the external periphery of the semi-fixed contact 36.
  • This last contact 36 can be pushed against the spring 38 in a withdrawal position, shown on the left side of the figure.
  • Intermediate partitions 42, 44 subdivide the internal volume of the enclosure 10 into three chambers, in this case a breaking chamber 46, delimited by the partitions 42, 44, and two expansion chambers 48, 50, delimited respectively by the partition 42 and the bottom 14, and the partition 44 and the bottom 12.
  • the movable 18 and semi-fixed contacts 36 as well as the contact tulips. 26, 26 ′ are arranged coaxially in the breaking chamber 46.
  • the internal volumes of the movable 18 and semi-fixed contacts 36 communicate via orifices 52, respectively with the expansion chamber 50 and with the expansion chamber 48, allowing an escape of the breaking gases from the breaking chamber 46 towards the expansion chambers 48, 50.
  • a blowing coil 54 In the central part of the cutting chamber 46 is arranged a blowing coil 54, of annular shape, being interposed at substantially the same distance between the tulip contacts 26, 26 '.
  • the annular lateral faces of the coil 54 are capped by electrodes 56, 58, each having an annular bead track 60, 62 facing the arc crowns 34 'and 34 respectively.
  • the coil 45 and the annular electrodes 56, 58 are clamped between flanges 64 by bolts 66, the assembly being secured to the intermediate partition 42 by one or more supports 68.
  • a cylinder 70 made of a magnetic material with the interposition of an insulating section or of an insulating material resistant to the action of the arc sheaths the cylindrical internal face of the coil 54 and has an internal diameter slightly greater than that of the movable tubular contact 18 to allow passage of this latter with little play.
  • the supply conductors of the coil 54 are electrically connected respectively to the annular electrode 56 and to the annular electrode 58.
  • Screens 72 extending the annular electrodes 56, 58 are arranged as deflectors of the gases ionized by the arc.
  • the arrangement is not necessarily symmetrical, as described and illustrated by the appended figure, and that the coil 54 may include a magnetic circuit for reinforcing the blowing field.
  • the subdivision of the arc into two divisional arcs with insertion of the blowing coil can be used in combination with additional blowing means, either by thermal expansion of the gases, or by self-compression by piston and cylinder or self-suction.
  • additional blowing means either by thermal expansion of the gases, or by self-compression by piston and cylinder or self-suction.
  • the fixed arrangement, illustrated by the figure, of the blowing coil is the simplest, it is conceivable to use a semi-fixed coil, which accompanies the movable contact in its opening movement over a limited stroke, so to generate the magnetic field more quickly.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
EP81401079A 1980-07-17 1981-07-06 Interrupteur à arc tournant double Expired EP0045229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8015858A FR2487113A1 (fr) 1980-07-17 1980-07-17 Interrupteur a arc tournant double
FR8015858 1980-07-17

Publications (2)

Publication Number Publication Date
EP0045229A1 EP0045229A1 (fr) 1982-02-03
EP0045229B1 true EP0045229B1 (fr) 1984-12-27

Family

ID=9244263

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81401079A Expired EP0045229B1 (fr) 1980-07-17 1981-07-06 Interrupteur à arc tournant double

Country Status (4)

Country Link
EP (1) EP0045229B1 (cg-RX-API-DMAC7.html)
JP (1) JPS5732521A (cg-RX-API-DMAC7.html)
DE (1) DE3167928D1 (cg-RX-API-DMAC7.html)
FR (1) FR2487113A1 (cg-RX-API-DMAC7.html)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002685A1 (de) * 1977-12-30 1979-07-11 Siemens Aktiengesellschaft Druckgasschalter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE822691C (de) * 1949-03-15 1951-11-26 Fabriek Van Electrische App N Wechselstromschalter, insbesondere fuer hohe Stromstaerken
DE2339652A1 (de) * 1973-08-04 1975-02-20 Bbc Brown Boveri & Cie Loeschkammer fuer mittel- und hochspannungsschaltgeraete
FR2368792A1 (fr) * 1976-10-20 1978-05-19 Cem Comp Electro Mec Appareil electrique de coupure, notamment un disjoncteur, a auto-soufflage de l'arc de coupure par un gaz
FR2418963A1 (fr) * 1978-03-01 1979-09-28 Merlin Gerin Dispositif d'extinction d'arc a autosoufflage et a arc tournant
FR2441261A1 (fr) * 1978-11-10 1980-06-06 Merlin Gerin Interrupteur a arc tournant
DE3066807D1 (en) * 1979-05-25 1984-04-12 South Wales Switchgear Electrical switchgear of the rotating arc, double-break type

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002685A1 (de) * 1977-12-30 1979-07-11 Siemens Aktiengesellschaft Druckgasschalter

Also Published As

Publication number Publication date
FR2487113B1 (cg-RX-API-DMAC7.html) 1983-07-29
FR2487113A1 (fr) 1982-01-22
JPS5732521A (en) 1982-02-22
EP0045229A1 (fr) 1982-02-03
DE3167928D1 (en) 1985-02-07

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