EP0037765A1 - Schalter mit durch einen Dauermagneten drehend bewegtem Lichtbogen - Google Patents

Schalter mit durch einen Dauermagneten drehend bewegtem Lichtbogen Download PDF

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Publication number
EP0037765A1
EP0037765A1 EP81400459A EP81400459A EP0037765A1 EP 0037765 A1 EP0037765 A1 EP 0037765A1 EP 81400459 A EP81400459 A EP 81400459A EP 81400459 A EP81400459 A EP 81400459A EP 0037765 A1 EP0037765 A1 EP 0037765A1
Authority
EP
European Patent Office
Prior art keywords
contact
permanent magnet
arc
annular
switch according
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
EP81400459A
Other languages
English (en)
French (fr)
Other versions
EP0037765B1 (de
Inventor
Georges Bernard
Serge Olive
Francesco Scarponi
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 EP0037765A1 publication Critical patent/EP0037765A1/de
Application granted granted Critical
Publication of EP0037765B1 publication Critical patent/EP0037765B1/de
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
    • H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • the present invention aims to allow the realization of a permanent magnet switch ensuring an energetic blowing of the arc without risk of demagnetization of the magnet.
  • the switch according to the invention is characterized in that the permanent magnet is attached to the rear face of the annular electrode and has a combined central recess of the central orifice of the annular electrode, so as to prevent the 'hooking of the arc on the central part of the magnet and to maintain the arc in the annular zone of maximum intensity of the magnetic blowing field.
  • the magnet By placing the magnet in the immediate vicinity of the annular electrode forming the migration path of the arc root and inside the contact, the magnet generates an intense blowing field in the arc zone while being sheltered from any demagnetizing field generated by the currents flowing through the contact which externally surrounds the magnet.
  • the central recess of the annular electrode and of the permanent magnet prevents any catching of the arc on the central part of the contact in the zone of zero field.
  • there remains no metal part capable of attracting the arc there remains no metal part capable of attracting the arc, and the latter is maintained on the annular tracks in the zone of maximum blowing without making use of insulating coatings subjected to the action. of the arc.
  • the permanent magnet can be shaped as a solid cylinder with axial magnetization having a central blind recess, or according to another embodiment as a torus with radial magnetization.
  • An insulating layer separates the permanent magnet from the contact that surrounds it so as to electrically and thermally insulate lie the magnet.
  • the central recess of the magnet is covered with a metal screen protecting the magnet, while the opposite rear face of the magnet is in thermal contact with a metal piece of heat removal to prevent any excessive heating of the magnet.
  • This metal part can be arranged in a magnetic bolt for strengthening and optimal orientation of the lines of force of the magnetic blowing field.
  • the envelope is filled with an electronegative gas such as sulfur hexafluoride and according to an important development of the invention, the magnetic blowing of the arc is combined with a pneumatic blowing obtained by a subdivision of the volume of the envelope in two chambers, one of which contains the separable contacts and the other of which constitutes an exhaust volume of the gases compressed by the action of the arc, the communication between the two chambers being arranged as a pneumatic blowing nozzle of the arc.
  • This communication can be constituted by the tubular movable contact passing through the partition separating the two chambers.
  • the internal space of the tubular contact communicates with the two chambers respectively by radial orifices and by the open end forming the contact surface.
  • an insulating casing 10 of cylindrical shape is closed at its ends by bottoms 12, 14, the casing being filled with an electronegative gas, such as sulfur hexafluoride, advantageously under pressure.
  • an electronegative gas such as sulfur hexafluoride
  • Inside the envelope 10 are axially disposed a fixed contact, designated by the general reference 16, and a movable contact 18,. mounted for axial sliding and secured to a control rod 20, which crosses the bottom 14 in a sealed manner.
  • An internal partition 22 subdivides the internal volume of the casing 10 into two chambers 24 and 26, the movable contact 18 passing through the partition 22.
  • the chamber 24 constitutes the switch-off chamber in which the contacts 16, 18 are arranged, while the chamber 26 constitutes an exhaust volume of the gases compressed by the action of the arc drawn in the chamber 24.
  • the movable tubular contact 18 constitutes a communication between the chambers 24, 26, the internal volume 28 of the tubular contact communicating on the one hand by radial orifices 30 with the chamber 26, and by the open end 32 with the chamber 24.
  • the annular edge 34 of the movable contact 18 constitutes the annular contact surface cooperating by abutment in the closed position of the switch with the fixed contact 16.
  • the edge 34 constitutes an annular track for migration of the drawn arc root between the separate contacts 16, 18.
  • the fixed contact 16 in the form of a hollow cylinder with a diameter equivalent to that of the movable contact 18 has on its flat face opposite the movable contact 18 an annular electrode or contact surface 36 cooperating in the closed position with the conjugate annular surface 34
  • a permanent magnet 38 in the form of a cylinder the bottom of which is attached to the rear face of the annular electrode 36.
  • the permanent magnet 38 with axial magnetization present in its part central opposite the orifice of the annular electrode 36 a recess or blind hole 40.
  • a metal screen 42 covers the wall of the recess 40 and is connected to the circular edges of the electrode 36.
  • the face of the magnet 38 opposite the movable contact 18 is covered on its outer periphery by the annular electrode 36 and on its central part by the metal screen 42.
  • the fixed contact 16 is attached and fixed to the bottom 12 of the casing 10, which is crossed by a terminal 44 for supplying the current.
  • the permanent magnet 38 is electrically and thermally insulated from the fixed contact 16 by an insulating layer 46 covering on the one hand the cylindrical surface of the magnet 38 and on the other hand the flat face attached to the electrode 36..11 is clear that the current flowing through the fixed contact 16 remains confined in the external cylindrical part of the contact 16 and does not generate any magnetic field inside the contact capable of demagnetizing the permanent magnet 18.
  • the rear face of the permanent magnet 38 is attached to a magnetic carcass 48 which facilitates the cooling by thermal conduction of the magnet 38.
  • the presence of the carcass 48 increases the intensity of the magnetic field generated by the magnet 38 and this carcass 48 is advantageously extended by a crown 50 external of the contact 16.
  • FIG. 1 on which the lines of force 51 of the magnet 38, are shown. it can be seen that the part 50 of the carcass 48 modifies the orientation of the lines of force, so as to orient the latter substantially horizontally in the figure in the separation zone of the contacts 16, 18.
  • the contacts 16, 18 are made of a material non-magnetic.
  • the permanent magnet 38, 52 can be a ferrite magnet or a metallic magnet or any other suitable type and the insulating layer 46, interposed between the magnet and the contact, can be based on polytetrafluoroethylene.
  • the assembly is particularly simple and does not require a large operating force. None of the parts are subjected to electrodynamic forces of repulsion which pose serious problems in rotary arc switches using the blow coils.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)
EP81400459A 1980-04-04 1981-03-24 Schalter mit durch einen Dauermagneten drehend bewegtem Lichtbogen Expired EP0037765B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8007904A FR2480028A1 (fr) 1980-04-04 1980-04-04 Interrupteur a arc tournant par action d'un aimant permanent
FR8007904 1980-04-04

Publications (2)

Publication Number Publication Date
EP0037765A1 true EP0037765A1 (de) 1981-10-14
EP0037765B1 EP0037765B1 (de) 1984-08-01

Family

ID=9240661

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400459A Expired EP0037765B1 (de) 1980-04-04 1981-03-24 Schalter mit durch einen Dauermagneten drehend bewegtem Lichtbogen

Country Status (7)

Country Link
US (1) US4424428A (de)
EP (1) EP0037765B1 (de)
JP (1) JPS5761223A (de)
CA (1) CA1154481A (de)
DE (1) DE3165171D1 (de)
FR (1) FR2480028A1 (de)
IN (1) IN154156B (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515418A1 (fr) * 1981-10-26 1983-04-29 Merlin Gerin Interrupteur a autoexpansion et a aimant permanent
FR2526998A1 (fr) * 1982-05-13 1983-11-18 Merlin Gerin Interrupteur a arc tournant et a aimant permanent
FR2824182A1 (fr) * 2001-04-26 2002-10-31 Alstom Disjoncteur a arc tournant a aimant permanent

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2679499B2 (ja) * 1991-12-27 1997-11-19 三菱電機株式会社 遮断器及び開閉部の操作機構
US6064024A (en) * 1999-06-25 2000-05-16 Eaton Corporation Magnetic enhanced arc extinguisher for switching assemblies having rotatable permanent magnets in housings mounted to fixed contacts
JP2012038684A (ja) * 2010-08-11 2012-02-23 Fuji Electric Fa Components & Systems Co Ltd 接点装置及びこれを使用した電磁開閉器
JP6044378B2 (ja) * 2013-02-13 2016-12-14 オムロン株式会社 切替装置
EP4300532A1 (de) * 2021-02-26 2024-01-03 Xiamen Hongfa Electric Power Controls Co., Ltd. Hochspannungsgleichstromrelais mit magnetstahllichtbogenlöschfunktion

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1042344A (fr) * 1950-11-10 1953-10-30 Deutsche Edelstahlwerke Ag Contact électrique pour l'extinction d'un arc de rupture par électro-aimant
DE967984C (de) * 1951-02-27 1958-01-02 Deutsche Edelstahlwerke Ag Schaltkontakt mit magnetischer Beblasung
FR1171319A (fr) * 1956-07-10 1959-01-23 C K D Modrany Commutateur électrique avec chambre d'extinction
FR1257305A (fr) * 1959-04-30 1961-03-31 Thomson Houston Comp Francaise Interrupteur à coupure dans le vide
US3082307A (en) * 1959-04-30 1963-03-19 Gen Electric Vacuum type circuit interrupter
DE1236628B (de) * 1961-05-17 1967-03-16 Bbc Brown Boveri & Cie Elektrischer Schalter, insbesondere Schuetz
FR2389219A1 (fr) * 1977-04-29 1978-11-24 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz
DE2752765A1 (de) * 1977-11-25 1979-05-31 Hermann Sturm Schaltkontaktstueck fuer leistungsschalter und schaltschuetze

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1042344A (fr) * 1950-11-10 1953-10-30 Deutsche Edelstahlwerke Ag Contact électrique pour l'extinction d'un arc de rupture par électro-aimant
DE967984C (de) * 1951-02-27 1958-01-02 Deutsche Edelstahlwerke Ag Schaltkontakt mit magnetischer Beblasung
FR1171319A (fr) * 1956-07-10 1959-01-23 C K D Modrany Commutateur électrique avec chambre d'extinction
FR1257305A (fr) * 1959-04-30 1961-03-31 Thomson Houston Comp Francaise Interrupteur à coupure dans le vide
US3082307A (en) * 1959-04-30 1963-03-19 Gen Electric Vacuum type circuit interrupter
DE1236628B (de) * 1961-05-17 1967-03-16 Bbc Brown Boveri & Cie Elektrischer Schalter, insbesondere Schuetz
FR2389219A1 (fr) * 1977-04-29 1978-11-24 Bbc Brown Boveri & Cie Disjoncteur electrique a gaz
DE2752765A1 (de) * 1977-11-25 1979-05-31 Hermann Sturm Schaltkontaktstueck fuer leistungsschalter und schaltschuetze

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515418A1 (fr) * 1981-10-26 1983-04-29 Merlin Gerin Interrupteur a autoexpansion et a aimant permanent
EP0078719A1 (de) * 1981-10-26 1983-05-11 Merlin Gerin Selbstblasschalter mit Dauermagnet
FR2526998A1 (fr) * 1982-05-13 1983-11-18 Merlin Gerin Interrupteur a arc tournant et a aimant permanent
EP0095406A1 (de) * 1982-05-13 1983-11-30 Merlin Gerin Schalter mit rotierendem Lichtbogen und Permanentmagnet
FR2824182A1 (fr) * 2001-04-26 2002-10-31 Alstom Disjoncteur a arc tournant a aimant permanent

Also Published As

Publication number Publication date
FR2480028B1 (de) 1982-10-29
JPS5761223A (en) 1982-04-13
IN154156B (de) 1984-09-29
US4424428A (en) 1984-01-03
FR2480028A1 (fr) 1981-10-09
CA1154481A (en) 1983-09-27
DE3165171D1 (en) 1984-09-06
EP0037765B1 (de) 1984-08-01

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