EP2313902A1 - Joue de soufflage pour une chambre d'extinction d'arc - Google Patents

Joue de soufflage pour une chambre d'extinction d'arc

Info

Publication number
EP2313902A1
EP2313902A1 EP09777016A EP09777016A EP2313902A1 EP 2313902 A1 EP2313902 A1 EP 2313902A1 EP 09777016 A EP09777016 A EP 09777016A EP 09777016 A EP09777016 A EP 09777016A EP 2313902 A1 EP2313902 A1 EP 2313902A1
Authority
EP
European Patent Office
Prior art keywords
extinguishing plate
plate according
extinguishing
composite
thickness
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Withdrawn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
EP09777016A
Other languages
German (de)
English (en)
Inventor
Volker Behrens
Thorsten Maldener
Thomas Honig
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.)
Doduco Solutions GmbH
Original Assignee
Doduco GmbH and Co
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 Doduco GmbH and Co filed Critical Doduco GmbH and Co
Publication of EP2313902A1 publication Critical patent/EP2313902A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36Metal parts

Definitions

  • the invention relates to extinguishing plates for arc extinguishing chambers in switching devices, in particular in circuit breakers.
  • extinguishing plates often referred to as quenching plates, are known for example from WO 2006/010572 A1.
  • extinguishing chambers are known in the switching devices.
  • a subdivision of arcs in partial arcs takes place in extinguishing chambers, which contain an array of extinguishing plates, according to the deionization principle.
  • metal sheets are arranged parallel to each other or fan-shaped and isolated from each other.
  • WO 2006/010572 A1 teaches to use coated extinguishing plates which consist of a ferromagnetic base body which carries a protective layer of 0.05 mm to 0.3 mm which contains high-temperature-resistant particles ,
  • the surface of the protective layers described in WO 2006/010572 A1 consists of 30% to 70% of high temperature resistant material.
  • Safety regulations generally require faultless switching behavior with at least three consecutive trips under short-circuit conditions. Although this can be achieved by extinguishing plates with the protective layers known from WO 2006/010572 A1, the known protective layers are generally rapidly destroyed by the action of arcing, so that the extinguishing plates must soon be replaced. However, thicker protective layers cause increasing shielding of the underlying ferromagnetic body, so that the arc is less strongly drawn into the quenching plates and thus erased worse.
  • the present invention is therefore based on the object to reduce the disadvantages of known arc-quenching chambers and to provide an extinguishing plate, which can survive a good number of switching cycles under short circuit conditions with good erase behavior.
  • An extinguishing plate according to the invention consists of an incorporation composite material in which a high-temperature-resistant phase is incorporated in a ferromagnetic phase.
  • the magnetic field attracting the arc is amplified by the ferromagnetic phase of the composite material.
  • a separate protective layer which like those of the WO 2006/010572 A1 known protective layer contains high-temperature-stable particles can be dispensed with, since the resistance of the intercalated composite, with which the extinguishing plate according to the invention is formed, is increased against arc exposure by the high temperature resistant phase.
  • the material of the intercalation composite burns off, this advantageously does not lead to a sudden deterioration in the function of the extinguishing plate, as is the case when a protective layer containing high-temperature-resistant particles burns off according to WO 2006/010572 A1 on a ferromagnetic base body.
  • the thickness of the interstitial composite material keeps the resistance of the extinguishing plate against arcing even after a considerable burnup.
  • the resistance to erosion can even increase as particles of the high-temperature-resistant phase accumulate under the action of arc on the surface of the composite material.
  • the high temperature resistant phase is evenly distributed in the intercalated composite.
  • a uniform distribution is not to be understood as a homogeneous distribution, since the size of the particles of the high-temperature resistant phase and the distribution of the particles of the high-temperature-resistant phase in the ferromagnetic phase are subject to statistical fluctuations.
  • the desired "uniform" distribution is therefore a distribution in which the uniformity is subject to statistical fluctuations.
  • An extinguishing plate according to the invention preferably consists completely, ie to 100%, of the intercalated composite material. However, this is not absolutely necessary in order to utilize the advantages according to the invention.
  • a reinforcement can be embedded in an extinguishing plate according to the invention and / or the extinguishing plate can carry a thin, electrically conductive coating as cover layer
  • an extinguishing plate according to the invention can namely even be improved by carrying a thin coating, in particular a dia- or paramagnetic coating, on the intercalated composite.
  • a coating of a highly conductive material such as copper, Silver or a copper or silver alloy at least for a few switching cycles lead to a much improved arc extinguishing property, even if the coating is only partially present.
  • the thin coating is at most 20 microns, for example 3-13 microns, thick.
  • Such a metal layer can be applied for example by electrodeposition on the intercalated composite.
  • Other options include PVD, CVD or thermal spraying.
  • Plastic coatings can be applied, for example, as a varnish, in a screen printing process or with a powder coating process.
  • the intercalated composite material fills most of the volume of the extinguishing plate. Particularly preferably, at least 70%, preferably at least 80%, of the volume of the extinguishing plate is filled by the intercalation compound.
  • a further development of the invention is an extinguishing plate composed of two extinguishing plates according to the invention, in which the two extinguishing plates are connected by a metallic intermediate layer which does not contain a high-temperature-resistant phase and whose thickness is small compared to the thickness of the composite extinguishing plate.
  • a composite extinguishing plate may contain as intermediate layer a metal sheet or a metal foil, on the top and bottom, for example, the composite material was deposited.
  • Such an intermediate layer makes - even together with any existing outer layers of the intercalated composite material - substantially less than half the thickness of the composite quenching plate.
  • the high temperature resistant phase of the encapsulant may be a refractory phase, such as a metal. It is also possible that the high-temperature resistant phase does not melt on reaching a high critical temperature, but sublimes or decomposes, as do some ceramics.
  • the intercalated composite material may in particular contain ceramic grains or refractory metals, in particular materials, the temperatures of at least 1900 0 C 1, preferably at least 2400 0 C, withstand, ie a phase transition temperature of at least 1900 0 C, preferably more than 2400 0 C 1 exhibit.
  • Both oxide ceramics for example MgO, ZrO 2 , Al 2 O 3 , ZrSiO 4 , MgAl 2 O 4 , and carbides, nitrides, suicides and borides are suitable, for example SiC, TiC, ZrC, B 4 C 3 , WC, Mo 2 C, VC, BN, AlN, TiN, Si 3 N 4, WSi 2, MoSi 2, Nb 5 Si 3, Ta 5 Si 3, TiB 2, ZrB. 2
  • refractory metals for example, W, Nb, Ta, Mo, V 1 Cr are suitable.
  • the intercalated composite may also contain various ceramic grains or refractory metals.
  • the high-temperature-resistant phase in connection with an intercalation composite according to the invention, this therefore includes all high-temperature-resistant materials contained in the intercalated composite material.
  • the high temperature resistant phase has a content of 10 vol.% As used herein.
  • the ferromagnetic phase of the intercalated composite material is preferably of iron or an iron alloy, but may for example also consist of nickel and / or cobalt or of ferromagnetic alloys.
  • the intercalated composite material can also contain a plurality of physically or chemically different ferromagnetic phases. As far as in connection with an intercalated composite of an extinguishing plate according to the invention of a ferromagnetic phase is mentioned, including all the ferromagnetic phases contained in the material to understand.
  • the high-temperature-resistant phase of an extinguishing plate according to the invention is preferably distributed over the entire thickness of the composite material, particularly preferably
  • the production takes place, for example, by powder metallurgy, melt metallurgy, continuous casting, impregnation of a porous skeleton or by pouring of high temperature resistant material with ferromagnetic matrix material, thermal spraying of matrix material and refractory Zuschlagstoff on a metallic substrate or electrodepositing a matrix with integrating a high temperature resistant phase.
  • powder metallurgy melt metallurgy
  • continuous casting impregnation of a porous skeleton
  • thermal spraying of matrix material and refractory Zuglerstoff thermal spraying of matrix material and refractory Zuschlagstoff on a metallic substrate or electrodepositing a matrix with integrating a high temperature resistant phase.
  • thermal spraying of matrix material and refractory Zuscherstoff on a metallic substrate or electrodepositing a matrix with integrating a high temperature resistant phase.
  • An extinguishing plate according to the invention is preferably 0.4 mm to 3 mm, in particular 0.8 mm to 1, 8 mm thick. Accordingly, the intercalation compound used according to the invention is preferably between 0.4 mm to 3 mm, in particular 0.8 mm to 1, 8 mm thick. It is thus preferred according to the invention for the thickness of the intercalated composite to be substantially identical to the thickness of the extinguishing plate.
  • the intercalated composite material can additionally contain, in addition to a ferromagnetic phase and a high-temperature-resistant phase, further phases, for example an electrically highly conductive phase, in particular copper or a copper alloy.
  • An additional phase can significantly increase the electrical conductivity of the composite, so that it is heated less when erasing an arc and consequently less load.
  • the ferromagnetic phase preferably accounts for more than half the volume of the intercalation compound, preferably at least 70%, in particular at least 85%. Due to a high proportion of the ferromagnetic phase, a strong magnetic force can advantageously be generated by interaction with the arc, which causes the arc to migrate very quickly into an extinguishing plate arrangement, split and extinguished.
  • the high-temperature-resistant phase of the intercalated composite preferably fills at least 5%, preferably at least 10%, of its volume. Relatively small proportions of the high-temperature-resistant phase are frequently sufficient, since the high-temperature-resistant phase can accumulate on its surface when the remaining phase (s) of the intercalated composite material melts.
  • the high-temperature-resistant phase therefore preferably accounts for less than 25%, preferably less than 20%, in particular less than 15%, of the volume of the intercalated composite.
  • the powder mixture is pressed into green sheets.
  • the green sheets are sintered and rolled to the desired thickness of 0.8 mm to 1.2 mm.
  • the rolling can be carried out in several rolling steps, between which the sintered plates are each outsourced. After the last rolling step, the sintered plates are preferably outsourced again.
  • the plates made from the intercalated composite material produced in this way are then galvanically coated with a thin electrically conductive layer, for example a copper layer, which is 5 to 10 micrometers thick.
  • a ferromagnetic iron-nickel alloy is thermally sprayed onto a substrate together with a high temperature resistant additive, such as tungsten, until a desired thickness of 0.5 mm to 2 mm is achieved.
  • the substrate may for example consist of an easily removable material such as cardboard or textile fabric. After removal of the substrate, the resulting composite material is electroplated with 5-10 microns of silver or a silver alloy.
  • a thin sheet such as aluminum or iron, can be used, on the top and bottom of the intercalated composite is produced by spraying.
  • the interstitial composite is applied to the top and bottom of the substrate until the two layers of interstitial composite thus formed are substantially thicker than the substrate, for example at least three times as thick.
  • An iron-cobalt alloy is electrodeposited with the incorporation of a high-temperature-resistant additive, for example Al 2 O 3, onto a conductive substrate. This conductive substrate can be removed after deposition.
  • a high-temperature-resistant additive for example Al 2 O 3

Landscapes

  • Coating By Spraying Or Casting (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Powder Metallurgy (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

L'invention concerne une joue de soufflage en matériau composite à phase dispersée, qui comprend une phase ferromagnétique dans laquelle une phase stable à haute température est intercalée. Exemple de réalisation: Pour produire le matériau composite en phase dispersée, on mélange 96 % en poids de fer et 4 % en poids de MgO. On presse le mélange de poudre en plaques crues. Les plaques crues sont frittées et sont laminées à l'épaisseur voulue de 0,8 mm à 1,2 mm. Le laminage est exécuté en plusieurs étapes entre lesquelles les plaques frittées sont respectivement vieillies. Après la dernière étape de laminage, les plaques frittées sont de préférence de nouveau vieillies. Les plaques en matériau composite en phase dispersée fabriquées de cette façon sont ensuite revêtues par galvanisation d'une mince couche électroconductrice de 5 à 10 micromètres, par exemple d'une couche de cuivre.
EP09777016A 2008-07-31 2009-07-08 Joue de soufflage pour une chambre d'extinction d'arc Withdrawn EP2313902A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008035974A DE102008035974B4 (de) 2008-07-31 2008-07-31 Löschplatte für eine Lichtbogen-Löschkammer
PCT/EP2009/004916 WO2010012355A1 (fr) 2008-07-31 2009-07-08 Joue de soufflage pour une chambre d'extinction d'arc

Publications (1)

Publication Number Publication Date
EP2313902A1 true EP2313902A1 (fr) 2011-04-27

Family

ID=41050867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09777016A Withdrawn EP2313902A1 (fr) 2008-07-31 2009-07-08 Joue de soufflage pour une chambre d'extinction d'arc

Country Status (6)

Country Link
US (1) US20110180515A1 (fr)
EP (1) EP2313902A1 (fr)
JP (1) JP2011529615A (fr)
DE (1) DE102008035974B4 (fr)
RU (1) RU2011105093A (fr)
WO (1) WO2010012355A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016213073A1 (de) 2016-07-18 2018-01-18 Ellenberger & Poensgen Gmbh Schaltsystem
JP6879173B2 (ja) * 2017-11-10 2021-06-02 三菱電機株式会社 開閉装置
CN110600348A (zh) * 2019-10-14 2019-12-20 中汇瑞德电子(芜湖)有限公司 灭弧室

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE439208A (fr) * 1934-10-20
GB803189A (en) * 1955-11-04 1958-10-22 Reyrolle A & Co Ltd Improvements relating to arc chutes
DE1127984B (de) * 1958-02-06 1962-04-19 Licentia Gmbh Lichtbogenloeschkammer ganz oder teilweise aus Magnetkeramik
US3254189A (en) * 1961-05-15 1966-05-31 Westinghouse Electric Corp Electrical contact members having a plurality of refractory metal fibers embedded therein
US4127700A (en) * 1973-10-12 1978-11-28 G. Rau Metallic material with additives embedded therein and method for producing the same
DE2362089A1 (de) * 1973-12-14 1975-06-26 Degussa Loeschbleche fuer elektrische schalter
CH594976A5 (fr) * 1976-05-07 1978-01-31 Bbc Brown Boveri & Cie
DE2756715C2 (de) * 1977-12-20 1982-10-14 Stettner & Co, 8560 Lauf Material für Bauteile von elektrischen Geräten, insbesondere Schaltgeräten
DE2832900A1 (de) * 1978-07-27 1980-02-07 Stettner & Co Mehrschichtiges bauteil fuer lichtbogenloeschkammer
US5259436A (en) * 1991-04-08 1993-11-09 Aluminum Company Of America Fabrication of metal matrix composites by vacuum die casting
US5616421A (en) * 1991-04-08 1997-04-01 Aluminum Company Of America Metal matrix composites containing electrical insulators
US5761025A (en) * 1995-02-13 1998-06-02 Iversen; Arthur H. Low cost power switchgear
US20020134758A1 (en) * 2001-02-06 2002-09-26 General Electric Company Arc splitter plate
DE102004036113B4 (de) 2004-07-24 2006-10-05 Ami Doduco Gmbh Löschblech für eine Lichtbogen-Löschkammer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010012355A1 *

Also Published As

Publication number Publication date
DE102008035974A1 (de) 2010-02-11
US20110180515A1 (en) 2011-07-28
RU2011105093A (ru) 2012-09-10
JP2011529615A (ja) 2011-12-08
WO2010012355A1 (fr) 2010-02-04
DE102008035974B4 (de) 2010-07-08

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