EP2124236A1 - Utilisation d'un matériau de contact électrique pour souffler un arc électrique - Google Patents

Utilisation d'un matériau de contact électrique pour souffler un arc électrique Download PDF

Info

Publication number
EP2124236A1
EP2124236A1 EP08156731A EP08156731A EP2124236A1 EP 2124236 A1 EP2124236 A1 EP 2124236A1 EP 08156731 A EP08156731 A EP 08156731A EP 08156731 A EP08156731 A EP 08156731A EP 2124236 A1 EP2124236 A1 EP 2124236A1
Authority
EP
European Patent Office
Prior art keywords
magnetic
entities
pads
magnetized
use 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.)
Withdrawn
Application number
EP08156731A
Other languages
German (de)
English (en)
French (fr)
Inventor
Laurent Doublet
Christine Bourda
Didier Jeannot
Pierre Ramoni
Dominique Givord
Sophie Rivoirard
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.)
Metalor Technologies International SA
Original Assignee
Metalor Technologies International 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 Metalor Technologies International SA filed Critical Metalor Technologies International SA
Priority to EP08156731A priority Critical patent/EP2124236A1/fr
Priority to AT09749760T priority patent/ATE545144T1/de
Priority to JP2011509934A priority patent/JP2011521418A/ja
Priority to CA2723770A priority patent/CA2723770A1/fr
Priority to SI200930226T priority patent/SI2297757T1/sl
Priority to CN2009801183666A priority patent/CN102037530A/zh
Priority to PT09749760T priority patent/PT2297757E/pt
Priority to EP09749760A priority patent/EP2297757B1/fr
Priority to US12/992,308 priority patent/US20110068088A1/en
Priority to PCT/EP2009/055879 priority patent/WO2009141270A1/fr
Priority to MX2010012523A priority patent/MX2010012523A/es
Priority to ES09749760T priority patent/ES2380310T3/es
Priority to BRPI0913030A priority patent/BRPI0913030A2/pt
Priority to PL09749760T priority patent/PL2297757T3/pl
Publication of EP2124236A1 publication Critical patent/EP2124236A1/fr
Priority to IL209303A priority patent/IL209303A0/en
Priority to HK11105874.7A priority patent/HK1152146A1/xx
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/446—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/0094—Switches making use of nanoelectromechanical systems [NEMS]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/023—Composite material having a noble metal as the basic material
    • H01H1/0237—Composite material having a noble metal as the basic material and containing oxides
    • H01H1/02372—Composite material having a noble metal as the basic material and containing oxides containing as major components one or more oxides of the following elements only: Cd, Sn, Zn, In, Bi, Sb or Te
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.

Definitions

  • the present invention relates to the field of electrical contacts. It relates, more particularly, to the use of an electrical contact material with arc extinguishing effect.
  • Such a type of material finds its application mainly for the realization of so-called "low voltage" contacts, that is to say whose operating range is approximately between 10 and 1000V and between 1 and 10000A.
  • These contacts are generally used in the domestic, industrial and automotive fields, both in direct current and AC, for switches, relays, contactors and circuit breakers, etc.
  • the energy released by the electric arc is sufficient to melt the material constituting the pads, which entails not only the degradation of the metal parts but also, sometimes, their welding, with the consequence of blocking the device.
  • one solution consists in using pseudoalloys comprising a silver or copper matrix and, inserted in this matrix, a fraction consisting of approximately 10 to 50% by volume of refractory particles (for example , Ni, C, W, WC, CdO, SnO 2 ) of a size generally between 1 and 5 microns.
  • refractory particles for example , Ni, C, W, WC, CdO, SnO 2
  • This method does not allow to limit the mergers and, because of their repetition, problems of erosion and welding of the studs can occur in the short or medium term.
  • Another solution, described in the US patent US 3,626,124 consists in using a material comprising single-domain magnetic particles. Such particles are spontaneously magnetized in an orientation random in the absence of an applied external field. The field generated by each magnetized particle acts on the arc of cutoff, facilitating its blowing. The particles described remain monodomain even after a heating beyond their Curie temperature so that the blowing efficiency is not affected by the heating due to the arc of cutoff, during openings previous contacts. However, each particle acts individually on the breaking arc so that the magnetic blow effect is very small. This solution is therefore not satisfactory.
  • An object of the present invention is therefore to overcome these disadvantages, by proposing to use an electrical contact material to make contact pads whose operation is not impaired in the short term or in the long term by the energy an electric arc.
  • the invention relates to the use of a material comprising a matrix of conductive metal and magnetic entities representing between 8 and 80% by weight of the material and comprising hard magnetic phases, said magnetic entities being non-magnetized and being capable of being made magnetized with a mean orientation, defined by the direction of a magnetic field applied to said material, for blowing an electric arc between two pads of electrical contacts, at least one of which comprises said material, and thereby reducing the duration of the arc.
  • the invention also relates to the use of a material comprising a matrix of conductive metal and magnetic entities representing between 8 and 80% by weight of the material and comprising hard magnetic phases, said magnetic entities initially not magnetized having been made magnetized with an average orientation, defined by the direction of a magnetic field applied to said material, for blowing an electric arc between two pads of electrical contacts, at least one of which comprises said material, and thus reducing the duration of the arc.
  • the material may further comprise a stable refractory fraction at a temperature greater than 900 ° C.
  • At least one of the phases of the magnetic entities is a hard magnetic compound based on rare earths.
  • said material is capable of generating a magnetic induction field, measured at its surface, greater than 20 mT, preferably greater than 60 mT, and more preferably greater than 100 mT.
  • At least one of said pads which comprises said material with the magnetic entities has an overlayer comprising a material selected from silver and copper.
  • the present invention relates to a material comprising a conductive metal matrix and magnetic entities representing between 8 and 80% by weight of the material and comprising phases magnetic resins, said magnetic entities being non-magnetized and capable of being magnetized with a mean orientation, defined by the direction of a magnetic field applied to said material, at least one of the magnetic phases being a land-based compound rare, with the exception of the samarium.
  • the present invention also relates to a material comprising a matrix of conductive metal and magnetic entities representing between 8 and 80% by weight of the material and comprising hard magnetic phases, said magnetic entities initially not magnetized having been made magnetized with a mean orientation, defined by the direction of a magnetic field applied to said material, at least one of the magnetic phases being a compound based on rare earths, with the exception of the samarium.
  • the invention relates to a pair of pads of electrical contacts, said pads defining between them an axis, characterized in that at least one of said pads is made of a material as defined above and presents a magnetization generating a magnetic field perpendicular to said axis.
  • a pair of electrical contact pads comprising, at the cathode, a contact pad made of a material defined above.
  • the material used according to the invention initially contains multidomain magnetic entities forming a set initially initially unmagnetized, and then to be magnetized by the application of a field.
  • the material used according to the invention does not initially contain spontaneously magnetized monodomain entities.
  • the magnetic entities represent between 10 and 50% by weight of the material, preferably between 12 and 30% by weight, and more preferably between 18 and 22% by weight of said material.
  • Magnetic entities include magnetic phases that can be obtained from one or more ferromagnetic or ferrimagnetic hard compounds.
  • they are chosen from compounds based on rare earths, among which mention may be made of the so-called RE-Fe-B type compounds (RE being the abbreviation of Rare Earth, Rare Earth).
  • RE is neodymium or praseodymium.
  • Other compounds of the RE-M type can be used, RE being preferably La, Gd, Y or Lu, of the 1/5, 1/7 or 2/17 type, and M being predominantly Co or Fe and possibly containing Cu, Zr, Al and other minority elements.
  • the compounds of the RE-Fe-N type can also be used.
  • the magnetic entities have a coercive field and a residual induction sufficient to allow their use in the targeted applications, these two parameters can be evaluated by simple experimental tests. Indeed, as will be explained below, it is necessary that the contact generates a certain magnetic field so as to destabilize a possible electric arc occurring between the pads. In particular, it must be that after having been exposed to a magnetic field, the material has a sufficient and stable long-term residual induction for long-term use.
  • This induction obtained by magnetization of the pads under an external magnetic field, can be characterized by the magnetic field generated on the surface of the pads, and persistent after removal of the applied magnetic field. As an indication, the field generated on the surface must be greater than 20 mT, preferably 60 mT, and more preferably greater than 100 mT, measured using a Hall effect probe distributed by Lakeshore.
  • the matrix comprises a refractory fraction, stable at a temperature above 900 ° C.
  • the refractory fraction may comprise one or more of the elements selected from the following group: CdO, SnO 2 , ZnO, Bi 2 O 3 , C, WC, MgO, In 2 O 3 , as well as Ni, Fe, Mo, Zr , W or their oxides.
  • the refractory fraction is added in an amount so that the percentage of magnetic entities is at least 8% and the amount of conductive metal is at least 20%.
  • the magnetic entities are dispersed in the matrix, either regularly, or according to a concentration gradient, or again in localized blocks.
  • the material may also contain dopants or minor additives, facilitating the use of the material, which may be, for example, Ni, Co, Fe, Bi, Re, Zr and their oxides.
  • the material described above is used to make pads of electrical contacts.
  • the first steps of the process of developing the material and forming the contact pads are common and are known to those skilled in the art who can choose between several techniques.
  • the method comprises an additional step of magnetizing the material on the already developed pads.
  • the material preparation step may be carried out by powder metallurgy, one of the magnetic entities being nanostructured RE-Fe-B, where RE is a rare earth element.
  • a preferred direction of the magnetic entities may be obtained by applying a suitable method during the development of the pads (pressure, magnetic field, heat treatment). This operation is not essential but it makes it possible to increase the magnetization of the studs induced by the field, applied after elaboration of the pads.
  • the use, as a starting material for constituting the magnetic entities of the contact, of a nanostructured tape of RE-Fe-B obtained by a rapid solidification technique, particularly by the technique known as melt spinning gives excellent results. It is not necessary to further describe this technique known to those skilled in the art. In summary, it consists in flowing, through a nozzle, molten metal contained in a reservoir, and in bringing a net of liquid metal in contact with a cylinder, for example copper, rotating great speed. Thanks to this technique, the RE-Fe-B cools by taking a microstructure, which allows it to present remarkable hard magnetic characteristics for the intended use.
  • the RE-Fe-B can be combined with other magnetic materials to optimize the magnetic properties of the assembly, the RE-Fe-B advantageously representing at least 50% by weight of the magnetic entities.
  • Contact pads are then shaped by cutting strips, stamping son, unit compression. They are then arranged on a suitable support, by any traditional method of assembling electrical contacts, in particular: resistance welding, resistance brazing, induction brazing, flame or oven brazing, crimping, incrustation ... view of their use as electrical contacts.
  • the material used according to the invention can be formed into a washer or a layer, forming a magnetic system, made integral with a traditional electrical contact pad by incrustation, welding, brazing or riveting, or by layer deposition (s).
  • the magnetic material, the contact material or both may be in the form of one or more layers.
  • the magnetic system can also serve as a mechanical support and supply current to the electrical contact. It is advantageously possible to adapt the magnetic system according to the variant in existing installations, while retaining the initial contact material, since it occupies only a small space in addition to the contact, unlike the electromagnetic members of the prior art.
  • the magnetic entities are not magnetized.
  • the pads must then undergo the magnetization step by applying a magnetizing magnetic field to provide the magnetic non-magnetized entities global magnetization in a mean orientation defined by the applied field.
  • the studs can then fully play their role of blower or arc extinguisher. This operation can take place in the factory, after development of the stud. It can also take place at the user, before or after the final assembly of the contact. It is performed by exposing the pads to a magnetic field of an intensity of between 0.5 and 30 T, preferably between 1 and 30 T, and even more preferably between 1 and 10 T.
  • the material used in the form of pads comprises initially unmagnetized magnetic entities that are either susceptible to being magnetized by the application of a magnetic field to the user, or already magnetized by the application of a magnetic field in the factory.
  • the field may in particular be applied in parallel or preferably perpendicular to the longitudinal axis of a stud, so that the latter has field lines as illustrated, respectively, on the Figures 1a and 1b .
  • the conditions of the magnetization step are adapted to the magnetic material so that, after having undergone the magnetization step, the studs are source of a magnetic induction field, which, measured at their surface, is greater than 20 mT, preferably 60 mT, and more preferably greater than 100 mT.
  • the pads thus obtained are then implemented in electrical contacts formed of two pads defining between them a first axis.
  • the contact may comprise a single pad obtained according to the above method, arranged in the case of a DC circuit, the anode or the cathode. It is also possible that the two studs forming the contact are made of a magnetic material used according to the invention. Various magnetic field orientations are possible and conceivable, for example, when a single magnetic pad is used, the field it generates can be oriented parallel or perpendicular to the first axis.
  • the stud may comprise an overlay deposited on the magnetic material.
  • Such an overcoat comprises a conductive material chosen from silver and copper and optionally a refractory compound chosen from the group comprising compounds CdO, SnO 2 , ZnO, Bi 2 O 3 , C, WC, MgO, In 2 O 3 , as well as Ni, Fe, Mo, Zr, W or their oxides.
  • the overlay advantageously makes it possible to isolate the magnetic entities from the stud of the contact surface and thus to reduce the risks of soldering on closing. Indeed, the blowing effect can be attenuated by the ionization of the constituent elements of the magnetic compound, the latter can increase the contact resistance and promote welding. In any case, the extreme surface of the contact is strongly heated under the effect of the arc so that the magnetic properties of the surface entities are generally destroyed in operation.
  • the overlayer must be thin enough so that the field created by the underlying magnetic entities in the arc area remains sufficiently intense, and possibly thick enough not to be completely melted under the effect of the arc. However, it turns out that the reduction in the duration of the arc obtained according to the invention leads to very low erosion.
  • the overlay may have a thickness of between 0.05 mm and 3 mm, preferably between 0.1 mm and 2 mm, and more preferably between 0.2 mm and 1 mm.
  • the powder thus obtained is mixed with powdered silver, the particles of which have a mean diameter of between 15 and 50 ⁇ m.
  • the mixture is produced in a mass proportion of 80% of silver and 20% EM magnetic entity powder.
  • a magnetic material is obtained constituting an electrical contact pad.
  • An electrical contact pad is then shaped by unitary compression and compacted under a pressure of 700 MPa.
  • the pad is then sintered under vacuum at 400 ° C for about 30 minutes.
  • the pad is then assembled on a support according to one of the techniques mentioned above, for use in an electrical contact.
  • the pad is magnetized by exposing it to a magnetic field of 8 T.
  • the pad is oriented perpendicular to the magnetic field, as illustrated on the figure 1a so that it has a magnetization perpendicular to its longitudinal axis.
  • the pad is a source of a remanent induction field of about 60 mT at the surface.
  • the pad obtained above is then used in a contact of a resistive-type electrical circuit, operating under a 42 V DC voltage, with an intensity of 37.5 A.
  • a magnet pad is disposed at the cathode, the other being silver.
  • the opening arc duration is measured. Closing tests are also performed to simulate the risks of welding, under the same conditions as for the opening, but with a current of 90 A. The percentage of welding obtained, whose breaking force is greater than 0, is measured. 1 N.
  • Example 1 is reproduced by replacing 6% by weight of silver of the matrix with 6% by weight of a refractory compound (SnO 2 ).
  • An overlayer 0.6 mm thick is applied to the magnetic material of the pad obtained in Example 1.
  • Said overlayer comprises 100% silver.
  • Example 1 is reproduced by not subjecting the pad to a magnetization (Example 4) or by using other materials to make the pads of the contact (Examples 5 and 6).
  • Example 4 shows the importance of the magnetization step of the stud since a contact comprising a non-magnetized stud has an arc duration at the opening of 9 ms while the contact comprising the magnetic pin has a arc duration at opening of 3 ms.

Landscapes

  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Hard Magnetic Materials (AREA)
  • Manufacture Of Switches (AREA)
EP08156731A 2008-05-22 2008-05-22 Utilisation d'un matériau de contact électrique pour souffler un arc électrique Withdrawn EP2124236A1 (fr)

Priority Applications (16)

Application Number Priority Date Filing Date Title
EP08156731A EP2124236A1 (fr) 2008-05-22 2008-05-22 Utilisation d'un matériau de contact électrique pour souffler un arc électrique
EP09749760A EP2297757B1 (fr) 2008-05-22 2009-05-14 Utilisation d'un materiau de contact electrique pour souffler un arc electrique
MX2010012523A MX2010012523A (es) 2008-05-22 2009-05-14 Uso de un material de contacto electrico para soplar un arco electrico.
CA2723770A CA2723770A1 (fr) 2008-05-22 2009-05-14 Utilisation d'un materiau de contact electrique pour souffler un arc electrique
SI200930226T SI2297757T1 (sl) 2008-05-22 2009-05-14 Uporaba elektriäśnega kontaktnega materiala za pihanje elektriäśne iskre
CN2009801183666A CN102037530A (zh) 2008-05-22 2009-05-14 用于吹电弧的电触头材料的应用
PT09749760T PT2297757E (pt) 2008-05-22 2009-05-14 Utilização de um material de contacto eléctrico para soprar um arco eléctrico
AT09749760T ATE545144T1 (de) 2008-05-22 2009-05-14 Verwendung eines elektrischen kontaktmaterials zum blasen eines elektrischen bogens
US12/992,308 US20110068088A1 (en) 2008-05-22 2009-05-14 Use of an electrical contact material for blowing an electric arc
PCT/EP2009/055879 WO2009141270A1 (fr) 2008-05-22 2009-05-14 Utilisation d'un materiau de contact electrique pour souffler un arc electrique
JP2011509934A JP2011521418A (ja) 2008-05-22 2009-05-14 電気アーク吹消し用電気接点材料の使用
ES09749760T ES2380310T3 (es) 2008-05-22 2009-05-14 Utilización de un material de contacto eléctrico para soplar un arco eléctrico
BRPI0913030A BRPI0913030A2 (pt) 2008-05-22 2009-05-14 utilização de um material de contato elétrico para soprar um arco elétrico
PL09749760T PL2297757T3 (pl) 2008-05-22 2009-05-14 Zastosowanie materiału na styki elektryczne do wydmuchiwania łuku elektrycznego
IL209303A IL209303A0 (en) 2008-05-22 2010-11-14 Use of an electrical contact material for blowing out an electric arc
HK11105874.7A HK1152146A1 (en) 2008-05-22 2011-06-10 Use of an electrical contact material for blowing an electric arc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08156731A EP2124236A1 (fr) 2008-05-22 2008-05-22 Utilisation d'un matériau de contact électrique pour souffler un arc électrique

Publications (1)

Publication Number Publication Date
EP2124236A1 true EP2124236A1 (fr) 2009-11-25

Family

ID=39855341

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08156731A Withdrawn EP2124236A1 (fr) 2008-05-22 2008-05-22 Utilisation d'un matériau de contact électrique pour souffler un arc électrique
EP09749760A Active EP2297757B1 (fr) 2008-05-22 2009-05-14 Utilisation d'un materiau de contact electrique pour souffler un arc electrique

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09749760A Active EP2297757B1 (fr) 2008-05-22 2009-05-14 Utilisation d'un materiau de contact electrique pour souffler un arc electrique

Country Status (15)

Country Link
US (1) US20110068088A1 (pt)
EP (2) EP2124236A1 (pt)
JP (1) JP2011521418A (pt)
CN (1) CN102037530A (pt)
AT (1) ATE545144T1 (pt)
BR (1) BRPI0913030A2 (pt)
CA (1) CA2723770A1 (pt)
ES (1) ES2380310T3 (pt)
HK (1) HK1152146A1 (pt)
IL (1) IL209303A0 (pt)
MX (1) MX2010012523A (pt)
PL (1) PL2297757T3 (pt)
PT (1) PT2297757E (pt)
SI (1) SI2297757T1 (pt)
WO (1) WO2009141270A1 (pt)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103551575A (zh) * 2013-10-31 2014-02-05 福达合金材料股份有限公司 一种具有自吹弧特性的软磁电触头材料的制备方法及其产品
CN113194590B (zh) * 2021-04-20 2023-03-14 核工业西南物理研究院 一种静电探针探头

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE857252C (de) * 1950-06-08 1952-11-27 Siemens Ag Anordnung an Schaltkontakten, insbesondere von Temperaturreglern
US3626124A (en) 1969-11-17 1971-12-07 Peter A Denes Arc and spark extinguishing contacts utilizing single domain magnetic particles
EP1482525A2 (en) 2003-05-26 2004-12-01 Omron Corporation Contact construction for DC loads and switching device having the contact construction

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3641298A (en) * 1967-07-19 1972-02-08 Mallory & Co Inc P R Electrically conductive material and electrical contact
JPS60162351U (ja) * 1984-04-05 1985-10-28 オムロン株式会社 電磁継電器
DE4117311A1 (de) * 1991-05-27 1992-12-03 Siemens Ag Kontaktwerkstoff auf silberbasis zur verwendung in schaltgeraeten der energietechnik
US5233143A (en) * 1991-11-06 1993-08-03 The United States Of America As Represented By The Secretary Of The Navy High-power gas switch with hydride electrodes
JPH0668735A (ja) * 1992-08-20 1994-03-11 Daido Steel Co Ltd 電気接点
JPH0773767A (ja) * 1993-09-06 1995-03-17 Daido Steel Co Ltd 電気接点
US5578885A (en) * 1994-12-22 1996-11-26 General Motors Corporation Rotor assembly for hybrid alternator
KR100332513B1 (ko) * 1998-08-21 2002-04-13 니시무로 타이죠 진공 밸브용 접점 재료 및 그 제조 방법
JP2002294384A (ja) * 2001-03-28 2002-10-09 Toshiba Corp 電気接点材料
JP3795830B2 (ja) * 2002-04-26 2006-07-12 株式会社日立製作所 車両用交流発電機
EP1381065A1 (fr) * 2002-07-12 2004-01-14 Metalor Technologies International S.A. Matériau de contact électrique et son procédé de fabrication
JP2004288605A (ja) * 2003-03-04 2004-10-14 Sumitomo Electric Ind Ltd 直流リレー
JP3950166B2 (ja) * 2004-07-16 2007-07-25 Ｔｄｋ株式会社 希土類磁石
JP4565338B2 (ja) * 2005-11-30 2010-10-20 アイシン精機株式会社 永久磁石の固定構造及び固定方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE857252C (de) * 1950-06-08 1952-11-27 Siemens Ag Anordnung an Schaltkontakten, insbesondere von Temperaturreglern
US3626124A (en) 1969-11-17 1971-12-07 Peter A Denes Arc and spark extinguishing contacts utilizing single domain magnetic particles
EP1482525A2 (en) 2003-05-26 2004-12-01 Omron Corporation Contact construction for DC loads and switching device having the contact construction

Also Published As

Publication number Publication date
US20110068088A1 (en) 2011-03-24
CA2723770A1 (fr) 2009-11-26
WO2009141270A1 (fr) 2009-11-26
CN102037530A (zh) 2011-04-27
MX2010012523A (es) 2011-02-22
BRPI0913030A2 (pt) 2015-10-13
JP2011521418A (ja) 2011-07-21
HK1152146A1 (en) 2012-02-17
SI2297757T1 (sl) 2012-08-31
EP2297757A1 (fr) 2011-03-23
ATE545144T1 (de) 2012-02-15
PL2297757T3 (pl) 2012-07-31
PT2297757E (pt) 2012-04-18
IL209303A0 (en) 2011-01-31
EP2297757B1 (fr) 2012-02-08
ES2380310T3 (es) 2012-05-10

Similar Documents

Publication Publication Date Title
CA2422301C (en) Thermal fuse
JP3598195B2 (ja) 接点材料
EP2297757B1 (fr) Utilisation d'un materiau de contact electrique pour souffler un arc electrique
JPH0254819A (ja) 真空バルブ用接点材料
FR2719151A1 (fr) Valve à vide et procédé pour fabriquer cette valve, et disjoncteur à vide comportant une valve à vide et procédé pour fabriquer ce disjoncteur.
JP3773644B2 (ja) 接点材料
EP1655749B1 (fr) Pastille de contact destinée à un contact électrique mobile de disjoncteur, contact électrique mobile possédant une telle pastille et disjoncteur comportant un tel contact
EP0290311B1 (fr) Matériau composite fritté pour contact électrique et pastille de contact utilisant ledit matériau
EP1522083B1 (fr) Materiau de contact electrique et son procede de fabrication
EP2909849B1 (fr) Dispositif d'établissement et/ou de coupure de courant à contacts permanents à usure réduite
JP4515696B2 (ja) 真空遮断器用接点材料
GB2338837A (en) Current control element switched by a magnetic field
JP2000226631A (ja) 真空バルブ及び真空開閉装置
JP3442644B2 (ja) 真空バルブ用接点材料
JP3068880B2 (ja) 真空バルブ用接点
JP2005036264A (ja) 電気接点及びこれを用いたブレーカー
JP2005116480A (ja) 高電圧負荷用開閉装置
JPH10199379A (ja) 真空遮断器用接点材料
EP2827352B1 (fr) Disjoncteur et procédé de fabrication d'un tel disjoncteur
Soldera et al. On the Erosion of Material Surfaces caused by Electrical Plasma Discharging
JP3827991B2 (ja) 真空遮断器用接点材料
JP4156867B2 (ja) 接点及びそれを搭載した真空遮断器
JP3688473B2 (ja) 真空バルブ用接点材料の製造方法
JP2004332046A (ja) 遮断器用接点材料及び真空遮断器
JP2001243857A (ja) 真空バルブ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

AKX Designation fees paid
REG Reference to a national code

Ref country code: DE

Ref legal event code: 8566

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20100526