EP0388323A1 - Elektrischer Autoexpansionsschalter mit Isoliergas - Google Patents

Elektrischer Autoexpansionsschalter mit Isoliergas Download PDF

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Publication number
EP0388323A1
EP0388323A1 EP90420100A EP90420100A EP0388323A1 EP 0388323 A1 EP0388323 A1 EP 0388323A1 EP 90420100 A EP90420100 A EP 90420100A EP 90420100 A EP90420100 A EP 90420100A EP 0388323 A1 EP0388323 A1 EP 0388323A1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
self
chamber
contacts
gas
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.)
Granted
Application number
EP90420100A
Other languages
English (en)
French (fr)
Other versions
EP0388323B1 (de
Inventor
Peter Malkin
Jean-Pierre Kersusan
Hugues Filiputti
Victor Pennucci
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 EP0388323A1 publication Critical patent/EP0388323A1/de
Application granted granted Critical
Publication of EP0388323B1 publication Critical patent/EP0388323B1/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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
    • H01H33/7046—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
    • 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 self-expanding electrical circuit breaker having a sealed enclosure filled with an insulating gas with high dielectric strength, and containing one or more poles, each pole comprising: - a first breaking chamber intended to store insulating gas heated by the arc; - a pair of contacts with relative displacement in axial translation comprising separable arcing contacts delimiting a cut-off interval in the first chamber; - A tubular gas exhaust duct, formed inside at least one of the contacts for communicating the first interrupting chamber with the remaining volume of the enclosure forming the second chamber for the expansion of the gas.
  • the object of the invention is to improve the dielectric strength of a circuit breaker with self-expansion of the insulating gas.
  • the circuit breaker according to the invention is characterized in that the exhaust duct is equipped with guide means arranged to oppose in said duct any gas flow vortex, in particular of the Vortex type.
  • the means for guiding the gas flow can be formed by ribs or bosses distributed around the internal periphery of the tubular contacts.
  • the ribs can be radial or inclined in the opposite direction of the rotational movement of the gas.
  • ribs or bosses channels the gas flow to generate a laminar or turbulent regime, defined as a function of the value of the Reynolds number, and of direction generally parallel to the axis.
  • a coil or a permanent magnet can advantageously be incorporated in the breaking chamber to cause the arc to rotate, allowing the arc to die out more quickly.
  • FIG. 1 the invention is described in relation to a circuit breaker or a switch at medium voltage or at high voltage described in document EPA298809, but it is obvious that it is applicable to any other type of self-expanding circuit breaker.
  • the pole comprises an enclosure 10 confined by a cylindrical envelope 12, closed at its ends by two bottoms 14,16.
  • the enclosure 10 is filled with a gas with high dielectric strength, in particular sulfur hexafluoride at atmospheric pressure or at overpressure.
  • the cylindrical casing 12 may be made of an insulating material and the bottoms 14, 16 made of a conductive material constituting areas of current supply.
  • the tubular movable contact 20 carries at its end a movable arcing contact 22, cooperating with a fixed arcing contact 23 carried by the contact 24 fixed to the opposite bottom 14.
  • the cylindrical surface 28 and the bottom 30 are metallic and electrically connected to the fixed contact piece 24.
  • the opposite bottom 32, crossed by the movable contact 20, is made of an insulating material ensuring electrical insulation between the movable contact 20 and the cylindrical surface 28.
  • a coil 34 attached to the metal bottom 30.
  • the coil 34 is capped with an electrode 36 constituting an arc migration track arranged opposite the movable arc contact 22.
  • the coil 34 is electrically connected on the one hand, to the electrode 36 and on the other hand, to the bottom 30 so as to be inserted in series between the movable arcing contact 22 and the fixed contact piece 24 in the closed position of the circuit breaker.
  • the breaking chamber 26 communicates with the enclosure 10, which constitutes an expansion chamber, of a on the one hand, by the tubular conduit 41 of the movable contact 20, the base of which has orifices 38 for communication between the tubular interior of the contact 20 and the enclosure 10 and, on the other hand, by the fixed contact piece 24 of tubular shape, which is extended through the coil 34 by a central duct 40 and which communicates at its base by orifices 42 with the enclosure 10.
  • the fixed arcing contact 23 is shown diagrammatically on the internal annular edge of the electrode 36.
  • the movable arcing contact 22 is abutted to the electrode 36 by closing the two exhaust conduits formed by the contacts 20,24.
  • the movable arcing contact 22 is a semi-fixed telescopic contact urged by a spring 44 in the extended position.
  • a sliding contact 46 carried by the bottom 16 of the enclosure 10, cooperates with the movable contact 20 to ensure the electrical connection of this movable contact 20 and of the current supply range formed by this bottom 16.
  • the cylindrical surface 28 of the interrupting chamber 26 is extended projecting from the insulating bottom 32 by a collar 48 arranged in main fixed contact.
  • the fixed main contact 48 cooperates with a movable main contact 50 constituted by a tulip contact carried by a support 52 secured to the movable contact 20.
  • the fingers of the tulip contact cooperate with the internal surface of the collar 48 so as to respect the size of the breaking chamber 26, but it is clear that a reverse arrangement so as to surround the collar 48 externally is usable when the size of the main contacts is secondary.
  • the current is switched in the parallel circuit formed by the movable arcing contact 22 and the coil 34
  • the main contacts 48.50 are opened without forming an arc and as soon as the current is switched in the parallel circuit, the coil 34 generates a magnetic field which contributes to the extinction of the arc formed during of the separation of the arcing contacts 22,36 during the continued opening movement of the circuit breaker.
  • the arc drawn in the interrupting chamber 26 causes the gas contained in this chamber to heat up and build up in pressure, which gas escapes through the tubular contacts 20, 24 towards the expansion chamber constituted by the enclosure 10. This results in a gas flow which causes the arc to blow.
  • the coil 34 is switched on as soon as the main contacts 48.50 are opened, but it is clear that this circuiting can be carried out in a different way, in particular by switching the arc on the electrode 36.
  • the coil 34 can also be replaced by a permanent magnet and the gas flow can take place through only one of the contacts.
  • At least one of the exhaust conduits 40,41 formed in the fixed tubular contacts 24 and movable 20 comprises guide means 56,58 (see FIG. 1) of the gas flow escaping towards the chamber expansion of the enclosure 10 during the arc extinction phase.
  • the guide means 56 and 58 are formed by radial ribs 60 secured to the inner cylindrical wall of the hollow arcing contacts 23, 22.
  • FIG. 3 shows the guide means 56 with four ribs 60 staggered at right angles along the cylindrical periphery of the support tube of the arcing contact 23.
  • the four ribs 60 do not do not extend to the center, so as to delimit a continuous central channel 62 at the entrance to the conduit 40.
  • a single diametrical separation rib 60 divides the interior of the hollow contact 23 into two adjacent channels 64, 66.
  • two diametrical ribs 60 are arranged in a cross to define four distinct channels 68, 70, 72, 74 at the inlet of the conduit 40.
  • the ribs 60 of the other guide means 58 are identical to those described above.
  • the guide means 56 comprise an alternating succession of grooves 78 and protuberances 80, circumferentially staggered along the internal tube of the arcing contact 23.
  • ribs 60 or protuberances 80 consists in channeling the gas axially in the conduits 40, 41 to prevent any vortex gas flow, in particular of the Vortex type.
  • the ribs 60 or protrusions 80 are made of conductive material.
  • the longitudinal position of the ribs 60 can be modified according to the sizes and cutting characteristics.
  • the ribs 60 or protuberances 80 can be made of insulating material, and have any shape, and in particular be inclined in the opposite direction of the rotational movement of the gas.
  • the invention also applies to a self-expanding circuit breaker without magnetic means for rotating the arc.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
EP90420100A 1989-03-17 1990-02-26 Elektrischer Autoexpansionsschalter mit Isoliergas Expired - Lifetime EP0388323B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8903642 1989-03-17
FR8903642A FR2644624B1 (fr) 1989-03-17 1989-03-17 Disjoncteur electrique a autoexpansion et a gaz isolant

Publications (2)

Publication Number Publication Date
EP0388323A1 true EP0388323A1 (de) 1990-09-19
EP0388323B1 EP0388323B1 (de) 1994-06-01

Family

ID=9379885

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90420100A Expired - Lifetime EP0388323B1 (de) 1989-03-17 1990-02-26 Elektrischer Autoexpansionsschalter mit Isoliergas

Country Status (5)

Country Link
US (1) US5057655A (de)
EP (1) EP0388323B1 (de)
JP (1) JPH02281522A (de)
DE (1) DE69009253D1 (de)
FR (1) FR2644624B1 (de)

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FR2693027B1 (fr) * 1992-06-30 1997-04-04 Merlin Gerin Interrupteur ou disjoncteur a auto-expansion.
IT1292453B1 (it) 1997-07-02 1999-02-08 Aeg Niederspannungstech Gmbh Gruppo rotante di contatti per interrutttori di alta portata
DE19816509B4 (de) * 1998-04-14 2006-08-10 Abb Schweiz Ag Abbrandschaltanordnung
DE19819242B4 (de) 1998-04-29 2005-11-10 Ge Power Controls Polska Sp.Z.O.O. Thermomagnetischer Leistungsschalter
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EP3622599B1 (de) * 2017-05-08 2022-03-09 Hitachi Energy Switzerland AG Gasisolierte leitung, gasisolierte schaltanlage und verfahren dafür
US11289291B2 (en) * 2018-06-25 2022-03-29 Mitsubishi Electric Corporation Gas circuit breaker
CN114068239B (zh) * 2021-11-10 2022-12-06 深圳市美韵声科技有限公司 一种配电系统用电安全闭合的智能断路器

Citations (6)

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Publication number Priority date Publication date Assignee Title
DE812088C (de) * 1949-08-27 1951-08-27 Schoppe & Faeser Anordnung zur schnellen Loeschung von Lichtboegen
DE1891058U (de) * 1963-02-05 1964-04-16 Bbc Brown Boveri & Cie Elektrischer stromunterbrecher.
EP0042456A1 (de) * 1980-06-23 1981-12-30 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
EP0075668A2 (de) * 1981-09-30 1983-04-06 Sprecher Energie AG Druckgasschalter
EP0080690A2 (de) * 1981-12-01 1983-06-08 VEB Elektroprojekt und Anlagenbau Berlin Verfahren zum Löschen des Lichtbogens in Hochspannungs-Hochleistungsschaltern
EP0298809A1 (de) * 1987-07-02 1989-01-11 Merlin Gerin Selbstbeblasender elektrischer Lastschalter mit rotierendem Lichtbogen

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
FR2565731A1 (fr) * 1984-06-08 1985-12-13 Interaction Perfectionnements aux disjoncteurs

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE812088C (de) * 1949-08-27 1951-08-27 Schoppe & Faeser Anordnung zur schnellen Loeschung von Lichtboegen
DE1891058U (de) * 1963-02-05 1964-04-16 Bbc Brown Boveri & Cie Elektrischer stromunterbrecher.
EP0042456A1 (de) * 1980-06-23 1981-12-30 BBC Aktiengesellschaft Brown, Boveri & Cie. Hochspannungsleistungsschalter
EP0075668A2 (de) * 1981-09-30 1983-04-06 Sprecher Energie AG Druckgasschalter
EP0080690A2 (de) * 1981-12-01 1983-06-08 VEB Elektroprojekt und Anlagenbau Berlin Verfahren zum Löschen des Lichtbogens in Hochspannungs-Hochleistungsschaltern
EP0298809A1 (de) * 1987-07-02 1989-01-11 Merlin Gerin Selbstbeblasender elektrischer Lastschalter mit rotierendem Lichtbogen

Also Published As

Publication number Publication date
US5057655A (en) 1991-10-15
FR2644624B1 (fr) 1996-03-22
EP0388323B1 (de) 1994-06-01
DE69009253D1 (de) 1994-07-07
FR2644624A1 (fr) 1990-09-21
JPH02281522A (ja) 1990-11-19

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