EP3782177A1 - Gasisolierte schaltanlage - Google Patents
Gasisolierte schaltanlageInfo
- Publication number
- EP3782177A1 EP3782177A1 EP19729673.4A EP19729673A EP3782177A1 EP 3782177 A1 EP3782177 A1 EP 3782177A1 EP 19729673 A EP19729673 A EP 19729673A EP 3782177 A1 EP3782177 A1 EP 3782177A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- insulated switchgear
- insulating medium
- switchgear according
- fluoronitrile
- 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- Withdrawn
Links
- 239000012159 carrier gas Substances 0.000 claims abstract description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 18
- 229910052760 oxygen Inorganic materials 0.000 claims description 18
- 239000001301 oxygen Substances 0.000 claims description 18
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 6
- -1 fluorine nitrile Chemical class 0.000 claims description 6
- 230000001590 oxidative effect Effects 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 5
- 239000011737 fluorine Substances 0.000 claims description 5
- AASDJASZOZGYMM-UHFFFAOYSA-N 2,3,3,3-tetrafluoro-2-(trifluoromethyl)propanenitrile Chemical compound FC(F)(F)C(F)(C#N)C(F)(F)F AASDJASZOZGYMM-UHFFFAOYSA-N 0.000 claims description 4
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 238000009413 insulation Methods 0.000 abstract description 6
- 238000010891 electric arc Methods 0.000 abstract 1
- 239000000306 component Substances 0.000 description 24
- 125000004429 atom Chemical group 0.000 description 16
- 239000007789 gas Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000009835 boiling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910018503 SF6 Inorganic materials 0.000 description 4
- 238000010790 dilution Methods 0.000 description 4
- 239000012895 dilution Substances 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 description 4
- 241000722921 Tulipa gesneriana Species 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- IYRWEQXVUNLMAY-UHFFFAOYSA-N fluoroketone group Chemical group FC(=O)F IYRWEQXVUNLMAY-UHFFFAOYSA-N 0.000 description 3
- 238000005468 ion implantation Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000002825 nitriles Chemical class 0.000 description 3
- 238000010792 warming Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000013590 bulk material Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ABQIAHFCJGVSDJ-UHFFFAOYSA-N 1,1,1,3,4,4,4-heptafluoro-3-(trifluoromethyl)butan-2-one Chemical compound FC(F)(F)C(=O)C(F)(C(F)(F)F)C(F)(F)F ABQIAHFCJGVSDJ-UHFFFAOYSA-N 0.000 description 1
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- MIQWEMDDUPSLRW-UHFFFAOYSA-N [O].O=C=O Chemical compound [O].O=C=O MIQWEMDDUPSLRW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 125000002560 nitrile group Chemical group 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- 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
-
- 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
- H01H33/22—Selection of fluids for arc-extinguishing
-
- 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
- H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
- H01H33/56—Gas reservoirs
- H01H2033/566—Avoiding the use of SF6
Definitions
- the invention relates to a gas-insulated switchgear according to the preamble of patent claim 1.
- SF 6 gas-insulated switchgear sulfur hexafluoride
- SF 6 has very good extinguishing properties and very good insulating properties, but it has a very high propellant house potential.
- the greenhouse potential of the SF 6 is about 23,000 times greater than the global warming potential of carbon dioxide.
- various insulating media are being investigated as an alternative to sulfur hexafluoride.
- the group of fluoroketones and the group of fluoronitriles are investigated here.
- the fluoroketone has been used to meet insulating properties with a low global warming potential
- the fluoronitrile must be mixed because of its boiling point with a low-boiling carrier gas and is not sufficient as a gas mixture with its dielectric strength to the conventional sulfur hexafluoride zoom.
- the dielectric coating of electrical conductors has been proposed in combination with fluoronitrile mixtures (WO 2014037566 A1).
- dilution with a carbon dioxide-oxygen mixture has been proposed in the use of heptafluoro-isobutyrarbonitrile in order to increase the dielectric strength over dilution with pure carbon dioxide
- the object of the invention is to provide a gas-insulated switchgear with an insulating medium ge compared to the conventional sulfur hexafluoride has a significantly lower global warming potential, the fluoronitrile keeps ent, but compared to the known prior art has a better long-term resistance in use in the gas-insulated switchgear.
- the gas-insulated switchgear according to the invention according to claim 1 has a housing that summarizes an insulating chamber, in the electrical current leading components are arranged. Furthermore, an insulating medium is present in the insulating chamber, which acts as an electrical insulator and / or for dissolving tion of an arc is used.
- the insulating medium comprises a fluoronitrile and another oxidizing carrier gas, such as oxygen.
- the invention is distinguished by the fact that at least below parts of the surface of the current-carrying components there are regions that are doped with foreign atoms.
- insulating media which comprise a fluoronitrile and an oxidizing carrier gas
- these are oxides on the surface of the conductive components, which in turn undergo a reaction with the fluorine nitrile.
- the constituent fluoride nitrile is decomposed from the insulating medium and the Isolierme medium gradually ver poorly insulating ver acting fluoronitrile.
- the electrically insulating effect and the extinguishing effect of the insulating medium are increasingly deteriorated by the described aging process.
- gas-insulated switchgear is understood to mean all electrical switchgear having an insulating medium. In particular, it means medium voltage switchgear and high voltage switchgear. Under current-carrying components are the components in the switchgear understood, which serve to guide electrical power, these are in particular the contacts and the electrical leads.
- the impurities that form in areas below the surface of the live components do- can exist in elemental, atomic and ionic form. Also impurity ions, which are integrated into a lattice structure of the material of the components, are referred to here as atoms. It is expedient only to dope parts of the surfaces and the underlying areas of the components to be doped with foreign atoms. These are in particular these parts of the surfaces which are exposed to the strongest, in particular thermal loads.
- the thickness of the regions doped with impurities which may also be referred to as the layer thickness, is at least 5 nm. Particularly preferably, the regions have a thickness of at least 20 nm.
- the defined thickness ensures that it is not a question of pure surface effects, and even when the surface is removed to a certain depth, it is ensured that the desired effect of avoiding oxide formation is achieved.
- Suitable foreign atoms are in particular non-metallic foreign atoms, in particular nitrogen or boron.
- the incorporation of these substances into the usually metallic lattice of the component material which in turn preferably comprises copper, silver,
- Including gold or alloys thereof has proven to be particularly effective for preventing an oxide layer on the surface of the components.
- the oxidizing carrier gas of the insulating medium comprises oxygen.
- the insulating medium would comprise a fluoronitrile, in particular heptafluoroisobutyronitrile and oxygen.
- the insulating medium may also contain nitrogen, carbon dioxide or a noble gas such as argon.
- nitrogen is exemplified without excluding other carrier gases.
- a mixture of said nitrile, oxygen and nitrogen has a high dielectric strength, the oxygen serving in particular lenstoffablagerened that arise when using the insulating medium with the fluoronitrile as quenching gas for arcs to prevent.
- the oxygen reacts with the carbon of the soot deposition to carbon monoxide or carbon dioxide, which in turn also provides a positive contribution to the Isolierei properties of the insulating medium.
- concentration of oxygen in the gas mixture of the insulating medium is a multiple n of the fluorine nitrile concentration, where 1 ⁇ n ⁇ 5.
- the insulating medium additionally or instead of the nitrogen contains carbon dioxide, in which case it is then again expedient that the concentration of the oxygen in the insulating medium is a multiple m of the concentration of fluoronitrile, where 0.5 ⁇ m ⁇ 4.
- Figure 1 is a schematic representation of a cross section through a gas-insulated switchgear
- Figure 2 is a schematic, enlarged cross-section through a surface and the underlying region of current-carrying components of the switchgear.
- a gas-insulated switchgear 1 which is constructed in the form of a Diskschalters, and whose function is not explained in detail at this point. It will be discussed only essential components of the gas-insulated switchgear 1, this would first be called a housing 2, which includes an insulating chamber 6. In the insulating chamber 6, which is designed geometrically complex, an insulating medium 8 is present. Furthermore, the switchgear 1 has two contacts 3, 4, a fixed contact 3 and a moving contact 4 which together form a contact system.
- the fixed contact 3 is designed in the form of a dome, the wegtern in the loading 4 in the form of a tulip contact can be inserted.
- the tulip contact also has inner and outer radial contact areas, but the contact system is designed in such a way that between the mandrel-shaped contact (fixed contact 3) and the tulip contact (moving contact 4) when opening and closing the contact system, an arc 10 is ent ,
- the insulating medium 8 serves on the one hand to an insulation between the housing 2 and the contacts 3, 4 environmentallyzustel sources, on the other hand, the insulating medium 8 is also there to extinguish the arc 10.
- the insulating medium 8 in this case has a proportion of a Fluornit riles, in this particular case of heptafluoro-iso-butyronitrile (CF) CF-CN, which is between 1 volume percent and 20 percent by volume. Further, the insulating medium 8 in this example, a nitrogen content which is between 10% by volume and 80% by volume and a Oxygen content, which is between 1 volume percent and 20 Volu menprozent.
- the ratio of oxygen to fluorine nitrile is a multiple n, where n is preferably in about 1 ⁇ n ⁇ 4. In an advantageous mixture, in addition to about 5% by volume of the nitrile, about 20% by volume of oxygen and about 75% of nitrogen are present.
- the contacts 3 and 4 are usually made of copper, silver or copper / silver alloys. Occasionally, silver or gold-plated copper materials are also used as contact materials as current-conducting components.
- surfaces 12 of the contacts 3, 4 but also of power supply components 16, in particular the surfaces 12, which are exposed in use of a relatively high thermal load of more than 70 ° C, are doped close to the surface with non-metallic impurities.
- an implantation method in particular ion implantation is used.
- said Oberflä surface 12 is bombarded in a special device for ion implantation with corresponding non-metallic impurities, insbesonde re nitrogen or boron.
- the ions of nitrogen or boron penetrate to a certain depth of penetration into a region 22 below the surface 12 in the material. This is illustrated schematically in FIG.
- the penetration depth can be determined during ion implantation by certain parameters, in particular by the kinetic energy of an individual ions. Also, the penetration profile and the resulting concentration along the penetration depth can be well controlled by the process parameters.
- the region 22 is doped with foreign atoms 18 under the surface 12 in such a way that the doping occurs to a depth 20 below the surface 12 of 5 nm.
- the depth 20 of the doping is preferably at least 20 nm in size. This doping with foreign atoms in the near-surface region causes oxide formation on the surface 12 in the areas in which doping is present or at least prevented is greatly reduced. This oxide formation is caused by the presence of the oxygen in the insulating medium 8 in the insulation medium described be.
- the fluoronitrile which is part of the insulating medium 8
- the depth 20 below the surface 12, which is doped with foreign atoms 18, should be at least 5 nm, preferably at least 20 nm. Furthermore, this depth 20 should not be more than 1 gm, preferably not more than 200 nm amount. A preferred range of the depth 20 below the surface 12, which is doped with foreign atoms do, is thus between 20 nm and 200 nm. A doping tion in higher depths, especially over 1 gm depth out could turn the contact properties of the contacts 3, 4 negative influence.
- this is explicitly referred to as a region ge, since the foreign atoms 18 are preferably introduced into the bulk material of the component 3, 4, 16.
- a layer not shown here, to the bulk material, that is, to the core material of the contacts 3, 4 or the supply components 16, which has exactly the described material structure with the embedded impurity atoms 18.
- a Kup fer Mrs with defined embedded nitrogen atoms in example applied by a deposition method who the. Again, this would be among the diction areas 22 with Foreign atoms 18 fall below the surface 12.
- the contacts 3 and 4 are made of copper or a copper alloy and are coated with a layer of silver or gold. Even then, it is expedient to introduce appropriate foreign atoms into the contact surface, which then just consists of the coated material.
- the oxidation of the surface 12 is prevented without adversely affecting electrical contacts 3, 4 or leads 16 negative.
- the contact resistance remains unchanged low, the volume conductivity is not affected by surface treatments in the range of less than 1 pm. With corresponding coating parameters, even the long-term behavior of the electrical contacts can be improved with the doping mentioned.
Landscapes
- Gas-Insulated Switchgears (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018209180.3A DE102018209180A1 (de) | 2018-06-08 | 2018-06-08 | Gasisolierte Schaltanlage |
PCT/EP2019/064262 WO2019233914A1 (de) | 2018-06-08 | 2019-06-03 | Gasisolierte schaltanlage |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3782177A1 true EP3782177A1 (de) | 2021-02-24 |
Family
ID=66821208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19729673.4A Withdrawn EP3782177A1 (de) | 2018-06-08 | 2019-06-03 | Gasisolierte schaltanlage |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3782177A1 (de) |
DE (1) | DE102018209180A1 (de) |
WO (1) | WO2019233914A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020202688A1 (de) * | 2020-03-03 | 2021-09-09 | Siemens Aktiengesellschaft | Isolationsmedium für eine Elektroenergieübertragungseinrichtung |
EP3982377B1 (de) | 2020-10-09 | 2023-11-29 | Hitachi Energy Ltd | Verfahren zur wiederherstellung einer elektrischen vorrichtung mit mittel- oder hochspannung |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7905720A (nl) * | 1979-07-24 | 1981-01-27 | Hazemeijer Bv | Werkwijze voor het verbeteren van schakelkontakten, in het bijzonder voor vakuumschakelaars. |
JPH05314846A (ja) * | 1992-01-27 | 1993-11-26 | Omron Corp | 接 点 |
FR2982994B1 (fr) * | 2011-11-21 | 2014-01-10 | Sc2N Sa | Commutateur electrique a contact frottant |
FR2995462B1 (fr) | 2012-09-10 | 2014-09-05 | Alstom Technology Ltd | Appareil electrique moyenne ou haute tension a faible impact environnemental et a isolation hybride |
FR3011138B1 (fr) | 2013-09-20 | 2015-10-30 | Alstom Technology Ltd | Appareil electrique moyenne ou haute tension a isolation gazeuse comprenant du dioxyde de carbone, de l'oxygene et de l'heptafluoroisobutyronitrile |
DE102016226034A1 (de) * | 2016-12-22 | 2018-06-28 | Siemens Aktiengesellschaft | Elektrische Schalteinrichtung |
-
2018
- 2018-06-08 DE DE102018209180.3A patent/DE102018209180A1/de not_active Withdrawn
-
2019
- 2019-06-03 WO PCT/EP2019/064262 patent/WO2019233914A1/de unknown
- 2019-06-03 EP EP19729673.4A patent/EP3782177A1/de not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
DE102018209180A1 (de) | 2019-12-12 |
WO2019233914A1 (de) | 2019-12-12 |
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