EP0982748A1 - Ensemble de commutation et son procédé de fabrication - Google Patents

Ensemble de commutation et son procédé de fabrication Download PDF

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Publication number
EP0982748A1
EP0982748A1 EP99810706A EP99810706A EP0982748A1 EP 0982748 A1 EP0982748 A1 EP 0982748A1 EP 99810706 A EP99810706 A EP 99810706A EP 99810706 A EP99810706 A EP 99810706A EP 0982748 A1 EP0982748 A1 EP 0982748A1
Authority
EP
European Patent Office
Prior art keywords
switching
protective layer
contact
arrangement according
switching arrangement
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
EP99810706A
Other languages
German (de)
English (en)
Other versions
EP0982748B1 (fr
Inventor
Thomas Dr. Schoenemann
Lukas Dr. Zehnder
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.)
ABB Schweiz AG
Original Assignee
ABB Hochspannungstechnik AG
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7878238&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0982748(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ABB Hochspannungstechnik AG, ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Hochspannungstechnik AG
Publication of EP0982748A1 publication Critical patent/EP0982748A1/fr
Application granted granted Critical
Publication of EP0982748B1 publication Critical patent/EP0982748B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H01H1/385—Contact arrangements for high voltage gas blast circuit breakers

Definitions

  • the invention relates to a switching arrangement, in particular for Circuit breakers, such as those in power plants, substations and other electrical energy supply facilities for and switching off operating and overcurrents as well as a process for their production.
  • the erosion-resistant material is practically not deformable is the possibilities of shaping one Basic body, which with a burn-resistant Cladding to be provided is very limited. Because of the Brittleness of the material it is also not possible flexible parts with a fire-resistant cladding Mistake. For these reasons, you are usually satisfied with it, e.g. B. tips of switching pins, burn rings and similarly simple parts made of fire-resistant material use. Other parts of the arc room and on the same Subsequent areas, which also the one at Are exposed to hot gases remain unprotected.
  • the invention has for its object a Specify generic switching arrangement that is simple How to manufacture and a process for their Manufacturing. This task is characterized by the characteristics of the Claim 1 and claim 22 solved.
  • the advantages achieved by the invention are next to facilitated manufacture of the switching arrangement, in particular of their burn-resistant parts, especially in that the possibility of fire-resistant protective layers attached, is significantly expanded. So can protective layers according to the invention on almost any molded parts, with variable thickness and self Composition can be applied. Thanks to their bigger ones Protective layers can also be flexible on flexible, in particular attached elastically deformable parts become essential without losing their flexibility would be affected or the risk of cracking in the protective layer would exist.
  • the housing parts 3, 4 are each with the opposite live connections of the Circuit breaker connected.
  • an outside Rated current switching arrangement arranged, each on the upper housing part 3 and lower housing part 4 subsequent, spaced apart in the axial direction revolving fixed nominal current contacts, an upper one fixed nominal current contact 6 and a lower one includes fixed current contact 7 and a movable nominal current contact 8 with in the circumferential direction consecutive, in the on position each Distance between the fixed nominal current contacts 6, 7 bridging contact fingers.
  • the mobile Current contact 8 is with a not shown Switching drive connected, through which it is in axial Direction between the switch-on position, in which he the Gap between the upper fixed nominal current contact 6 and bridges the lower fixed nominal current contact 7 and the switch-off position, in which it is from the upper fixed nominal current contact 6 is spaced, is movable.
  • the upper housing part 3 is through a horizontal partition 9 completed down. It carries the fixed part a burn-up switching arrangement 10.
  • the partition 9 In a central opening the partition 9 is the first switching piece a contact tulip 11 attached with several in the circumferential direction successive, diagonally down and against the Switching axis 2 directed, separated by slots elastic contact fingers.
  • the contact tulip 11 opposite is a nozzle 12 surrounding the switching axis 2 made of electrical insulating material arranged in the shape of a has a funnel narrowing upwards.
  • slide guide 13 which also establishes a good electrical connection as a second contact piece axially by means of the switching drive movable switching pin 14 mounted in the Switch-on position protrudes into the contact tulip 11 and from it Contact fingers is touched on the outside. The same will happen slightly elastically deformed so that it is a relatively high contact pressure on the switching pin 14 exercise.
  • the sliding guide 13 is on a partition 15 anchored, which the lower housing part 4 upwards concludes. In a central opening of the partition 15 the nozzle 12 is attached.
  • the switching pin 14 In the off position, the switching pin 14 is down drawn so that its tip is below the nozzle 12. Is between the contact tulip 11 and the switching pin 14 then an arc room 16, in which when switched off there is an arc 17 between said switching elements has trained.
  • the arc room 16 is one contiguous annular heating volume 18 surround the with him through the contact tulip 11 from the nozzle 12 separating gap, the circumferential blow slot 19th forms, is connected.
  • the heating volume 18 is through on the outside a peripheral wall 20 made of insulating material completed.
  • the movable nominal current contact 8 and the switch pin 14 pulled down.
  • the mobile Nominal current contact 8 is fixed from the top Rated current contact 6 separated so that the current from the Rated current switching arrangement on the erosion switching arrangement commutates.
  • the switching pin 14 is separated from the Contact tulip 11, the arc 17 is then drawn, which, when the switching pin 14 has reached the switch-off position, through the nozzle 12, the contact tulip 11 with the tip of the Switch pin 14 connects.
  • the contact tulip 11 (Fig. 2a) as the first contact of the Burn-up switching arrangement consists of individual contact fingers 25, which surround the switching axis 2. They are minor elastically deformable and their tips are in the Switch-on position through contact with switching pin 14 slightly deflected outwards, which is sufficient Ensures contact pressure.
  • the contact tulip 11 has one Base body 26 made of copper or another suitable Material on whose surface in the area of the contact finger 25 lies behind the surface according to the final dimension and which in said area a burn-resistant protective layer 27 which fills up the difference to the final dimension.
  • the protective layer 27 is produced by the other technical fields of well known methods of Plasma spraying. Their composition can largely be that of correspond to conventional erosion-resistant material.
  • the switching pin 14, the second contact piece of the Burn-up switching arrangement consists of a z. B. from a Copper alloy or other known for the purpose suitable material manufactured base body 28, the Surface at the tip and in the adjoining one Area behind the surface according to the final dimension, the first by a turn on the base body 28 Protective layer 29 applied by plasma spraying becomes.
  • the protective layer 29 forms at the top of the Switch pin 14 a relatively massive cap and ends in a slightly thinner coat. According to Fig. 2a the jacket extends over the contact area, which in the switched-on position by the contact fingers 25 the contact tulip 11 is touched.
  • Fig. 2b is a slightly different version of the Protective layer 29 shown, according to which it before this Contact area stops. Because the conductivity of the Protective layer 29 is less than that of the base body 28, the contact resistance is lower and the Commutation of the current on the erosion switching arrangement facilitated. Since in the present described Abbrandschaltanowski the contact tulip 11 at the Switching off of hot gases is recommended it, its protective layer at least on the front area and stretch the inside. When switching pin 14 are the areas slightly further behind the top on the other hand, little burden and generally do not require anyone Protective layer. In switching arrangements in which the rear parts of both contact blocks located in the front areas are not the protective layers are conceivable not to extend on both sides to the contact area and thereby further reduce the contact resistance.
  • the formation of the protective layers 27, 29 can after Extent and thickness very precisely on the resulting from the Load on the switching elements resulting requirements can be set. In general, it is sufficient that Separation areas of the contact pieces, on which they are located in the Disconnect disconnection from each other and where first Form arcing base points, as well as each other in the Switch-off position opposite front areas, between to which the arc burns and which burns out Radiation and hot gases are particularly heavily contaminated, to be provided with protective layers.
  • other parts of the Arcing space such as wall sections by means of Plasma-sprayed, erosion-resistant protective layer protect against gases heated by the arc.
  • the circuit breaker's rated current switching arrangement according to 1 includes the upper fixed nominal current contact 6 as the first contact and the movable nominal current contact 8 as a second contact.
  • the latter has (Fig. 3a, b) several hundred over the scope of the nominal current switching arrangement distributed parallel contact fingers, which in groups of several contact fingers grouped together via one Pressure spring 30 on an axially displaceable carrier ring 31 are stored. It follows several groups of Contact fingers 32 each a group of slightly longer Power fingers 33.
  • the upper fixed nominal current contact 6 is designed as a contact ring 34 on the outside thereof the contact fingers 32 and the power fingers 33 in the Switch on position.
  • the power fingers 33 again consist (see FIG. 3c) a base body 35 which on the contact ring 34 facing crest a burn-resistant protective layer 36 has, which in turn by means of plasma spraying is applied.
  • a protective layer 37 on its switch-off edge has, which is slightly pulled up on the outside is.
  • the contact ring 34 is located above the protective layer 37 a silver-plated contact zone 38, which in the Switch-on position not only by the power fingers 33, but also from the somewhat shorter contact fingers 32, which are also silver-plated is touched.
  • the Rated current switching arrangement has a very high Continuous current carrying capacity and a very low one Contact resistance.
  • the contact fingers When switching off, the contact fingers are released first 32 from the contact ring 34, whereupon the current on the Power finger 33 commutates. If this also from Contact ring 34 are disconnected, it comes before the current completely commutated to the erosion switching arrangement, for Arcing between the separation areas at the ends the power finger 33 and on the edge of the contact ring 34, the protective layers 36 and 37 ensure that the burns up within narrow limits.
  • Burn-up switching arrangements include Switching elements used for the purpose of electromagnetic Forces to increase the contact pressure are shaped and complex e.g. T. are flexible, but with a Burn-resistant largely corresponding to requirements Protective layer are provided. They specifically point out Switch pins on with one each at the top then a protective layer on the outside having resistant section, which in two or more parallel or anti-parallel partial conductors decay.
  • the first switching ring 39 at a distance opposite is one on the top of the partition 15 attached second switching ring 40 arranged such that arranged between them concentrically to the switching axis 2 Switching rings is an arc room 16, which with the Heating volume 18 via a circumferential blow slot 19 connected is.
  • the switching pin 14 is further down from a sliding bell 41 surround which, like the second switching ring 40 with the second electrical connection is connected.
  • the Switch pin 14 has a central mandrel 42 trained carrier, in the tip of a cap 43 erosion-resistant material is screwed in, which is a sleeve 44 made of highly conductive, resilient material, in particular clamps a ring 45 at the front end thereof.
  • a sleeve 44 made of highly conductive, resilient material, in particular clamps a ring 45 at the front end thereof.
  • Of the Ring 45 is a group of eight on the same level Switch pin 14 arranged, separated by slots elongated contact fingers 46, which, the mandrel 42 approximately surrounding parallel, protrude to the rear.
  • the mandrel 42 is from the cap 43 to beyond the ends of the contact fingers 46 surrounded by an insulating sleeve 47 with which a thicker insulating ring 48 overlaps.
  • the switching pin 14 largely fills its opening, as does that of the second switching rings 40, in which the insulating ring 48 lies.
  • the current path runs from the first switching ring 39 the contact surfaces 49 into the contact fingers 46 and through the same to the ring 45 and further through the mandrel 42 and over the sliding bell 41.
  • the one surrounded by the contact fingers 46 the foremost part of the mandrel 42 forms a partial conductor, the one to the currents in the also partial conductor forming contact fingers 46 with which he through the ring 45th electrically connected, anti-parallel current wearing.
  • the first switching ring 39, the second switching ring 40 and the Cap 43 exist because they are simple, rigid parts acts from solid, in a known manner by sintering manufactured fire-resistant material. However, you could also, similar to the tip of the switching pin according to Fig. 2b, each from a base body from z. B. one Copper alloy exist, the one by plasma spraying applied protective layer made of fire-resistant material wearing.
  • the more complicated shaped flexible sleeve 44 is anyway again made up of a base body 50 and one of them Protective layer 51 forming the outer surface erosion-resistant material caused by plasma spraying the base body 50 was applied.
  • the base body 50 consists of an elastic material of good Conductivity.
  • the protective layer 51 is sufficient flexible to the elastic deformations that the Contact fingers 46 are subjected to follow. That's the way it is possible, not only the particularly stressed parts like that Tip of the switching pin 14, the first switching ring 39 and the second switching ring 40, on which Form arc base points to protect, but the entire outside of one of the cap 43, the sleeve 44 and the inner front part of the mandrel 42 is formed resistant portion of the switching pin 14 by escaping hot gases is also heavily loaded.
  • Each of the extensions 52a, b has a contact piece 54a at the end or 54b with a contact surface 49 for contacting the Inner surface of the first switching ring 39 with which he is connected via a connecting piece 55a or 55b in such a way that each of the contact pieces 54a, b is opposite to the respective one Extension 52a or 52b with respect to a switching pin axis, which coincides with the switching axis 2, offset by 180 ° is.
  • the connectors 55a, b are short, one half-gear screw sections formed.
  • the contact pieces 54a, 54b are separated from each other by a Continuation 53 'of the slot 53 separately. Taken together they have a polygonal cross-section, in the example a twelve-sided one on.
  • the first contact piece 54a runs into the hemispherical tip of the switching pin 14. Of this Apart from the difference, they each correspond to one Extension 52a or 52b, a connecting piece 55a or 55b and a contact piece 54a or 54b existing parts of the Switch pin 14, which is made in one piece with the mandrel 42 highly conductive, resilient material are produced, Completely.
  • the first switching ring 39 and the second also exist here Switch ring 40 in a conventional manner from solid sintered erosion-resistant material.
  • the switching pin 14 again consists of a base body 56 highly conductive elastic material that is in the range of the connectors 55a, b and those connected to them Contact pieces 54a, b formed in two partial conductors decaying resistant section through Plasma-sprayed, erosion-resistant protective layer 57 carries. It is in the range of through the Arc base particularly heavily loaded tip of the Switch pin 14 relatively thick and to the Outer surfaces of the contact pieces 54a, b and Connecting pieces 55a, b are made somewhat thinner.
  • the hemispherical tip of the switching pin as a cap made of solid, sintered in a conventional manner fire-resistant material.
  • Plasma spraying is characterized by a high electric field a suitable plasma gas generates a plasma in which introduced a powder mixture by means of a conveying gas becomes.
  • the powder mixture is liquefied and together with the gas through the electric field against the body accelerated and sprayed onto its surface where it forms a layer that solidifies quickly.
  • Plasma spraying is avoided by oxidation preferably carried out under vacuum.
  • the protective layers produced in this way have a Burn-up resistance to that of conventional ones manufactured fire-resistant parts is not inferior. she are also relatively flexible, so that any Deformations of the base body are not hindered.
  • the Thickness of the layer applied by plasma spraying precisely and variably adjustable. Postprocessing by Machining is therefore usually only minor Extent especially for setting the Surface properties required. Most of all, it is often relevant, the surface roughness by grinding or Reduce polishing. Removing bigger ones Material volumes e.g. B. by milling is also possible, however mostly not necessary.
  • composition of the powder mixture which for the production of the erosion-resistant protective layer on the Base body is used in each case and then the Composite corresponds to the same, so there are many Possibilities. It can largely depend on the respective Needs to be matched. Usually you will like with known sintered erosion-resistant materials provide a mix that is good Burn-off resistance a high-melting component and a lower melting component, which by evaporation to Cooling contributes, contains.
  • a Proportion of refractory metals with a melting point of at least 2,000 ° C such as W, Mo or Ir of at least 10% (wt.), Preferably at least 50% (wt.) Be favorable, while as lower melting materials with a Melting point below 2'000 ° C Cu, Ag, Ti, Fe can be used can.
  • W, Mo or Ir at least 10%
  • wt. Preferably at least 50% (wt.) Be favorable, while as lower melting materials with a Melting point below 2'000 ° C Cu, Ag, Ti, Fe can be used can.
  • Other copper alloys, especially with Mo are cheap.
  • protective layers are also possible consist exclusively of refractory material or - Especially in applications where the loads are less - those that have no such components included, but z. B. only copper with an additive, for example chrome. There are a lot of them Compositions possible, provided that the Burn-off resistance is sufficient for the respective application. So come as a further component of the Powder mixture also Au, Ru, Pd, Os, Pt and further Ni, Cd, Sn, C in question.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Manufacture Of Switches (AREA)
EP99810706A 1998-08-21 1999-08-06 Ensemble de commutation et son procédé de fabrication Revoked EP0982748B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19837945 1998-08-21
DE19837945A DE19837945A1 (de) 1998-08-21 1998-08-21 Schaltanordnung und Verfahren zu ihrer Herstellung

Publications (2)

Publication Number Publication Date
EP0982748A1 true EP0982748A1 (fr) 2000-03-01
EP0982748B1 EP0982748B1 (fr) 2003-11-05

Family

ID=7878238

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810706A Revoked EP0982748B1 (fr) 1998-08-21 1999-08-06 Ensemble de commutation et son procédé de fabrication

Country Status (5)

Country Link
US (1) US6211478B1 (fr)
EP (1) EP0982748B1 (fr)
JP (1) JP2000067679A (fr)
CN (1) CN1132211C (fr)
DE (2) DE19837945A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005048281A1 (fr) * 2003-11-11 2005-05-26 Siemens Aktiengesellschaft Dispositif de commutation
WO2013093033A1 (fr) 2011-12-21 2013-06-27 Alstom Technology Ltd Dispositif de protection contre les particules engendrees par un arc electrique de commutation
US9443666B2 (en) 2012-10-02 2016-09-13 Alstom Technology Ltd. Electrical contact device of the contact finger type with a strong nominal current
EP2909849B1 (fr) 2012-10-19 2016-12-07 General Electric Technology GmbH Dispositif d'établissement et/ou de coupure de courant à contacts permanents à usure réduite

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI294308B (fr) 2000-11-15 2008-03-11 Daicel Chem
US8314355B2 (en) * 2005-05-20 2012-11-20 Mitsubishi Electric Corporation Gas insulated breaking device
DE102006016723A1 (de) * 2006-04-04 2007-10-11 Siemens Ag Lichtbogenkontaktstift
FR2931303A1 (fr) * 2008-05-15 2009-11-20 Daniel Bernard Contact electrique et son procede de fabrication associe
JP5306242B2 (ja) * 2010-01-12 2013-10-02 株式会社東芝 ガス絶縁開閉装置
JP4684373B1 (ja) * 2010-02-04 2011-05-18 三菱電機株式会社 ガス遮断器
US9012800B2 (en) 2010-02-04 2015-04-21 Mitsubishi Electric Corporation Gas circuit breaker
JP5455775B2 (ja) * 2010-05-11 2014-03-26 三菱電機株式会社 遮断器
WO2013030963A1 (fr) * 2011-08-30 2013-03-07 三菱電機株式会社 Disjoncteur à gaz
FR2985080A1 (fr) * 2011-12-21 2013-06-28 Alstom Technology Ltd Ensemble de connexion electrique
DE102012101222A1 (de) * 2011-12-21 2013-06-27 Alutec Metal Innovations Gmbh & Co. Kg Kontaktstift für Hochspannungs-Leistungsschalter und Hochspannungs-Leistungsschalter mit einem solchen Kontaktstift
AT13815U3 (de) * 2014-02-21 2015-05-15 Plansee Powertech Ag Kontaktstift und Rohrkontakt sowie Verfahren zur Herstellung
US10002733B2 (en) * 2016-03-02 2018-06-19 General Electric Technology Gmbh Internal tulip sleeve of the female arcing contact of a high voltage electric circuit breaker
DE102017221707A1 (de) * 2017-12-01 2019-06-27 Siemens Aktiengesellschaft Elektrischer Schalter
CN109411263B (zh) * 2018-11-01 2020-05-29 上海思源高压开关有限公司 静触头、旋转刀片式隔离开关及高压组合电器
EP3796353A1 (fr) * 2019-09-20 2021-03-24 Siemens Energy Global GmbH & Co. KG Agencement de contact
US11380501B2 (en) * 2019-12-31 2022-07-05 Southern States Llc High voltage electric power switch with carbon arcing electrodes and carbon dioxide dielectric gas
DE102020210342A1 (de) 2020-08-14 2022-02-17 Siemens Aktiengesellschaft Verbesserte Vakuumschaltröhre

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Publication number Priority date Publication date Assignee Title
EP0428740A1 (fr) * 1989-05-10 1991-05-29 The Furukawa Electric Co., Ltd. Materiau de contact electrique, procede de production de ce materiau, et contact electrique ainsi produit
EP0800191A2 (fr) * 1996-04-04 1997-10-08 Asea Brown Boveri Ag Disjoncteur

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Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
EP0428740A1 (fr) * 1989-05-10 1991-05-29 The Furukawa Electric Co., Ltd. Materiau de contact electrique, procede de production de ce materiau, et contact electrique ainsi produit
EP0800191A2 (fr) * 1996-04-04 1997-10-08 Asea Brown Boveri Ag Disjoncteur

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005048281A1 (fr) * 2003-11-11 2005-05-26 Siemens Aktiengesellschaft Dispositif de commutation
DE10353497A1 (de) * 2003-11-11 2005-06-09 Siemens Ag Schalteinrichtung
US7679021B2 (en) 2003-11-11 2010-03-16 Siemens Aktiengesellschaft Switching device
WO2013093033A1 (fr) 2011-12-21 2013-06-27 Alstom Technology Ltd Dispositif de protection contre les particules engendrees par un arc electrique de commutation
US9269514B2 (en) 2011-12-21 2016-02-23 Alstom Technology Ltd. Device for protection against particles generated by an electric switching arc
US9443666B2 (en) 2012-10-02 2016-09-13 Alstom Technology Ltd. Electrical contact device of the contact finger type with a strong nominal current
EP2909849B1 (fr) 2012-10-19 2016-12-07 General Electric Technology GmbH Dispositif d'établissement et/ou de coupure de courant à contacts permanents à usure réduite
US10186389B2 (en) 2012-10-19 2019-01-22 Alstom Technology Ltd Current connection and/or cut-off device comprising permanent contacts with reduced wear

Also Published As

Publication number Publication date
DE19837945A1 (de) 2000-02-24
EP0982748B1 (fr) 2003-11-05
CN1245964A (zh) 2000-03-01
CN1132211C (zh) 2003-12-24
DE59907605D1 (de) 2003-12-11
JP2000067679A (ja) 2000-03-03
US6211478B1 (en) 2001-04-03

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