WO2012041714A1 - Matière cellulosique soumise à imprégnation, utilisation de cette matière cellulosique et procédé pour la produire - Google Patents

Matière cellulosique soumise à imprégnation, utilisation de cette matière cellulosique et procédé pour la produire Download PDF

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Publication number
WO2012041714A1
WO2012041714A1 PCT/EP2011/066011 EP2011066011W WO2012041714A1 WO 2012041714 A1 WO2012041714 A1 WO 2012041714A1 EP 2011066011 W EP2011066011 W EP 2011066011W WO 2012041714 A1 WO2012041714 A1 WO 2012041714A1
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WIPO (PCT)
Prior art keywords
cellulosic material
cellulose material
impregnation
impregnated
electrolyte
Prior art date
Application number
PCT/EP2011/066011
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German (de)
English (en)
Inventor
Volkmar LÜTHEN
Gabriele Winkler
Original Assignee
Siemens Aktiengesellschaft
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Publication of WO2012041714A1 publication Critical patent/WO2012041714A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/42—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups anionic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/185—Substances or derivates of cellulose
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/448—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from other vinyl compounds
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/48—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials

Definitions

  • Impregnated cellulose material use of this cellulose material and process for its preparation
  • the invention relates to a cellulose material, which is provided with egg ⁇ ner, the electrical conductivity of the cellulosic material he ⁇ -increasing impregnation. Moreover, the invention relates to a use of this cellulosic material. Finally, the invention also relates to a process for producing this cellulosic material.
  • an impregnable solid material made of cellulose fibers in an aqueous oxidant tion medium such as. B. a weakly acidic solution of iron (III) chloride solution, cerium (IV) sulfate, potassium hexacyanoferrate (III) or molybdatophosphoric acid can be immersed. Subsequently, the wet cellulosic material is treated either with liquid or vaporous pyrrole compounds at room temperature until the pyrrole is polymerized as a function of the concentration of the oxidizing agent. The thus impregnated cellulosic material is dried at Hauttem ⁇ temperature 24 hours.
  • the oxidizing agent ensures ei ⁇ neminte for the polymerization of pyrrole compounds, Au ßerdem for increasing the electrical conductivity.
  • the specific resistance p of such impregnated cellulose materials can thus be influenced by the concentration of pyrroles and the type of oxidizing agent.
  • Her ⁇ position of the impregnated cellulose material the toxic effect see the pyrrole needs through appropriate working conditions and an appropriate waste disposal into consideration the ⁇ .
  • electrically conductive polymers for example from DE 10 2007 018 540 AI known to use transparent, electrically conductive layers example ⁇ example for the heating of automotive glass.
  • electrically conductive polymers examples include polypyrroles, polyaniline, polythiophenes, polyparaphenylenes, polyparaphenylene-vinylenes and derivatives of the polymers mentioned.
  • a spe ⁇ cial example of such polymers is PEDOT, which the trade name Baytron is marketed by Bayer AG also un ⁇ ter. PEDOT is also known by its systematic name as poly (3,4-ethylene dioxythiophene).
  • the object of the invention is to provide a cellulose material with an impregnation which increases the electrical conductivity of this cellulose material or a process for its production which allows a simplified production.
  • the object of the invention is also to specify a use for this cellulosic material.
  • the genann ⁇ te cellulose material characterized in that the impregnation consists of a polymer which is crosslinked from a negative ion ⁇ mer, in particular PSS, and a positively charged ionomer.
  • the cellulosic material materials of all known forms can be used. Cellulosic materials are preferably prepared as paper, paperboard or pressboard Herge ⁇ . These cellulosic materials may be semi-finished products for technical components, which are advantageously used in the impregnated variant.
  • positively charged ionomers preferably PEDOT or PANI can be used. PEDOT is the already mentioned poly (3,4-ethylene dioxydthiophene).
  • PANI is polyaniline and PSS is polystyrene sulfonate.
  • PSS polystyrene sulfonate.
  • the use of negatively charged and positively charged ionosphere mere advantageously allows particularly simple herstel ⁇ development of the cellulosic material.
  • the ionomers can be easily dissolved in water and are thus led to ⁇ the manufacturing process of the cellulose material, which is also water-based.
  • crosslinking the ionomers following preparation of the cellulosic material the resistivity of the cellulosic material can be lowered.
  • the ionomers polymerize and form an electrically conductive network in the cellulosic material, which is responsible for the reduction of the specific resistance.
  • the process of production with relatively non-toxic substances are performed, so that in comparison to the use of pyrroles much lower demands on the process reliability must be made.
  • no gifti ⁇ gen waste is whose disposal would mean an additional expense.
  • the resistivity p of the p-defined impregnating ⁇ cellulosic material at 10 is 12 Gm. This has in ⁇ play, with the use of the cellulosic material in oil has the advantage that the resistivity of the cellulose material is comparable in order of magnitude to that of the oil, which is why dielectric stress during operation uniformly distributed on the transformer oil and the insulating material.
  • the cellulosic material with an electrical conductivity of the cellulosic material increasing Imstorygnie ⁇ tion which is composed of polymer which is crosslinked from a negative ge ⁇ invited ionomer and a positively charged ionomer, is used as insulation material for a transformer.
  • the cellulosic material is preferably flat and provided over the entire thickness with an at least Wesentli ⁇ chen constant concentration of the intended for impregnation polymer. In this way it can be achieved that the resistivity, in particular when using the cellulosic material as electrical insulation in oil over the entire cross section of the insulation produces a uniform voltage drop (to the present in the electrical insulation in transformers conditions hereinafter more).
  • an aqueous electrolyte is made from a po sitive ⁇ charged ionomer, and a negatively charged ionomer, in particular PSS.
  • Cellulose fibers are added to this electrolyte. This results in a pulp, the starting material for a production of paper, which is drawn from the pulp.
  • the cellulose fibers can also be impregnated with the electrolyte.
  • the electrolyte can be supplied this intermediate.
  • the water of the electrolyte is at least so far removed that the cellulosic material is formed.
  • the cellulosic material already forms a handleable dressing, which can be used as a basis for further processing. This is done by drainage, for example, as known from the manufacture of paper, by Ab ⁇ drop of the pulp on a screen.
  • the Io ⁇ nomere networked preferably a heat treatment above the crosslinking temperature of the respective ionomers required. This forms the already mentioned above network of polymers, which is electrically conductive, and therefore reduces the specific resistance of the Cellulosem- material.
  • PEDOT and / or PANI are used as positively charged ionomers.
  • the advantages associated with the selection of these ionomers have already been explained above.
  • the removal of the water before the crosslinking of the ionomers is supported by a rolling of the cellulosic material.
  • This is be ⁇ Sonders advantageous in a continuous production of the cellulose material, since it can be produced by rolling the Cellulosemateri ⁇ as a long web.
  • the removal of the water and / or the crosslinking of the ionomers is effected by pressing heated rolls against the cellulose material.
  • the heat can beneficial ⁇ way enter into the cellulosic material particularly effective.
  • the necessary crosslinking temperature can be set. Heating of the cellulose material simultaneously causes evaporation of the residual water and thus a drying process. This can be at least initiated by the heated rollers, wherein a final Trock ⁇ NEN can also be done for example in a heat chamber.
  • the cellulosic material is produced by layers of several previously impregnated layers.
  • the cellulosic material according to the invention was prepared according to an exemplary embodiment under laboratory conditions, wherein the process sequence is to be explained in more detail below.
  • a commercially available pressboard was used (hereinafter referred to as "cellulose state of delivery"). This was initially in 90x50 mm pieces with a thickness of 3.1 mm cut. These were heated 95-99 ° C with stirring by a magnetic stirrer until individual layers is started to dissolve in the edge region of the pressing chip temperatures in distilled water at Tempe ⁇ . At this stage, the pressboard was completely soaked with water. The wet one
  • Pressboard was taken out of the water and separated into its individual layers. The separated layers were reheated in distilled water at 95-99 ° C with stirring until more individual leaves dissolved. The individual layers and leaves were removed again from the water and separated to the thinnest separable layer. The very thin, mecha nically ⁇ no longer separable layers were heated with stirring in distilled water (temperature so) until single cellulosic fiber present.
  • the filtration of the resulting pulp was carried out to thin fabric layers.
  • the individual cellulose sefäden were filtered off with the aid of a Büchner funnel ⁇ under application of a vacuum.
  • the filter paper used was a black belt filter from Schleicher & Scholl No. 589 or 595.
  • the fabric layers thus obtained still contained from 270 to 300% of water, based on the original weight of the pressboard used.
  • the fabric layers lie ⁇ KISSING be easily separated from the black band filter.
  • the individual fabric layers were dissolved in individual cellulose threads in an aqueous solution containing one percent by weight PEDOT: PSS solution while stirring with a magnetic stirrer at room temperature. These were impregnated with PEDOT: PSS during the stirring process. After one hour
  • the impregnated fabric layers should be smoothed by rollers.
  • the individual Gewebslagen were superimposed and slightly pressed together with a flat Ge ⁇ subject matter.
  • the stack of impregnated fabric layers was compressed several times with increasing pressure by a roller.
  • the single ⁇ NEN fabric layers were compressed to form a fiber felt impregnated, wherein excess liquid was squeezed out.
  • the Ge ⁇ webestapel was compressed until the thickness of it ⁇ preserved fiber felt about 4 - was 4.5 mm.
  • the polymers should networked who carried ⁇ and a drying of the cellulosic material.
  • ⁇ to the remaining water was removed by evaporation in a drying cabinet between steel plates under pressure.
  • the temperature for drying was chosen so that initially a cross-linking of the polymer took place with each other.
  • the impregnated fiber felt was placed between steel plates. The steel plates were compressed at a pressure of 2.4 KPa.
  • the contact surfaces with which the impregnated fiber felt came into contact were coated with Teflon in order to prevent caking of the unpolymerized starting materials to the metal plates.
  • the crosslinking of the polymer was carried out at 82 ° C and took between 30 and 90 minutes.
  • PANIrPSS controlled the electrical properties so that the specific resistance of the cellulosic material could be changed.
  • the apparatus required could be kept relatively low compared to the use of compounds because of the toxic Pyrrolver- safety of the ver ⁇ used polymers.
  • FIG. 1 shows cellulose fibers, which are surrounded by a network of polymers, in accordance with an embodiment of OF INVENTION ⁇ to the invention the cellulosic material in three-dimensional view,
  • FIG. 2 schematically shows the section through a multilayer cellulosic material according to another embodiment of the cellulosic material according to the invention
  • FIG. 3 shows an embodiment of the Cel ⁇ lulosematerials invention in section, as this is used as insulation in egg ⁇ nem transformer, wherein the applied voltages are shown schematically on the insulating material
  • Figure 4 shows an embodiment of the method according to the invention, shown schematically by a manufacturing plant as a side view and Figure 5 graphically the achieved specific resistances of different embodiments of the cellulosic material according to the invention.
  • a cellulosic material is represented by two cellulose fibers 12 on which polymers 13 are inserted
  • This network 14 is obtained by polymerizing the polymer only after impregnation of the cellulose fibers 12 and preparation of the cellulosic material.
  • the network 14 penetrates the cellulosic material, so that an electrically conductive connection of the electrically conductive polymer is ensured. Therefore, the network 14 of the polymer 13 reduces the resistivity of the cellulosic material in the manner described above.
  • a cellulosic material can also be constructed from a plurality of layers 13.
  • these are layers whose impregnation has taken place only after their production. Therefore, it can be seen that the network 14 of the polymers is in each case only in the vicinity of the surface of the layers 13, because the electrolyte, with which the layers 13 were soaked, had only penetrated into the surface of the individual layers.
  • An electrical insulating material 18 according to Figure 3 consists of multiple layers of paper 19 as cellulosic material, Zvi ⁇ rule which oil layers are twentieth The papers 19 are soaked with oil, which is not shown in detail in Figure 3. For this, the impregnation with BNNT 11 can be seen in FIG. 3 within the papers.
  • Iso-regulation ⁇ surrounds example, in a transformer, the windings used there, which must be electrically insulated from the outside and from each other.
  • the electrical insulation of a transformer must prevent electrical breakthroughs in Be ⁇ drive case when applying an AC voltage.
  • the isolation behavior of the insulation depends on the permittivity of the components of the insulation.
  • the permittivity ⁇ 0 is approximately 2, for the paper ⁇ ⁇ at 4.
  • the insulation with an AC voltage therefore results for the load of the individual insulation components, that the voltage applied to the oil U 0 is about twice is high, as the voltage applied to the paper U p .
  • the BNNT not influence the stress distribution in the inventive insulation, since the permittivity SB also is approximately 4, and therefore the Permittivi ⁇ ty Scomp of the impregnated paper is also at about 4.
  • the voltage U 0 acting on the oil is approximately twice as great as the voltage U comp applied to the nanocomposite (paper).
  • the distribution of the adjacent tension on the individual insulation components is then no longer dependent on the permittivity, but on the specific resistance of the individual components.
  • the specific resistance p Q of oil is 10 12 Gm.
  • ⁇ is about p p of paper around three orders of magnitude higher, at 10 15 Gm. This causes that when a DC voltage is applied, the voltage across the oil U Q is one thousand times the voltage on the paper U p . This imbalance involves the risk of breakdowns in the insulation when the insulation is subjected to DC voltage and electrical insulation fails.
  • the inventively introduced into the paper 19 BNNT 11 are z. B. by a suitable coating of PEDOT: PSS and possibly by an additional doping with dopants with their specific resistance (between 0.1 and 1000 Gern) adjusted so that the specific resistance of the paper P P is reduced.
  • a specific conductivity p C om P can be set for the composite according to the invention, which is approximated to the specific resistance p 0 and, in the ideal case, approximately corresponds to this.
  • a specific resistance p C om P of about 10 12 Gm is the oil applied to the voltage U 0 in the area of the composite anlie ⁇ constricting voltage U C om P / so that a balanced clamping ⁇ voltage profile in the insulation is established. This advantageously improves the dielectric strength of the insulation, since the load on the oil is appreciably reduced.
  • FIG. 4 shows a production plant for a cellulose material in the form of a paper web 22, which adjoins the
  • This system has a first container 23 for an electrolyte 24, wherein in the electrolyte ionomers of PEDOT and PSS are included. In addition, will be out a reservoir 25 cellulose fibers 12 in the electrolyte 24 drizzled. In this way, most ⁇ ter type and therefore not shown in detail, a pulp prepared in the electrolyte at 24 in which is deposited on a sieve-like treadmill 26th This treadmill transferred to a second container 27, where the electrolyte can drain 24, which is produced from the cellulose fibers an already partially enticas ⁇ serte mat.
  • the electrolyte is fed via a pump 28 to a reprocessing plant 29, where the required concentration of PEDOT and PSS is set again.
  • the treated electrolyte can be supplied via an inlet 30 to the first container 23.
  • the paper web 22 is produced in the further course of the process. First he ⁇ followed by a further dewatering by a pair of rollers 31, whereby the liberated in this dewatering step Elect ⁇ rolyt is collected in the container 27th Subsequently pas ⁇ Siert the paper web 22, a next pair of rolls 32, with a comparatively large angle of wrap is accomplished by the S-shaped guide the paper web to the roll pair.
  • the pair of rollers is in fact heated by the heaters 33a indicated so that a heat transfer to the Pa ⁇ pierbahn is possible. Additional heating devices 33b can also be used as support for this purpose.
  • Heating means 33a, 33b, the paper web is brought to polymerization temperature, so that the ionomers polymerize to PEDOT: PSS and forms the network already described above. This treatment also involves further drainage.
  • electrolyte can again be applied to the paper web via a further feed device 34, with the meanwhile largely draining off.
  • absorbent web is absorbent enough so that the cellulose fibers can be soaked with the electrolyte.
  • the paper web 22 passes through another pair of rollers 35 and is thereby dewatered again. Further dehydration and polymerization of the additionally introduced ionomers is achieved via a pair of rollers 36, wherein this can be heated in the manner described for the pair of rollers 32 via heaters 33a, 33b.
  • the paper web 22 leaves the pair of rollers 36 the paper web is largely drained. However, this still contains a residual content of water and is therefore one
  • Drying device 37 is supplied and can be dried in this drying device as needed.
  • the specific resistance p of the paper web 22 produced depends not only on the content of PEDOT: PSS but also on the residual water content. If the Pa ⁇ pierbahn example, be used as electrical insulation in a transformer, it must be impregnated with oil and must therefore possible not contain more water. This is ensured by the subsequent drying in the Tro ⁇ cken worn 37th
  • the drying device 37 may be designed, for example, as an oven.
  • the ⁇ sem electrolyte was fed a stock solution of PEDOT and PSS in each case at a concentration of 1 wt .-%, which was characterized in the one case by an electric conductivity of lxlCT 5 S / cm and in the other case by 1 S / cm.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Organic Insulating Materials (AREA)

Abstract

L'invention concerne une matière cellulosique composée de fibres cellulosiques (12) soumises à imprégnation. Selon l'invention, une imprégnation (13) des fibres cellulosiques est effectuée sur la base de polymères électroconducteurs, notamment PEDOT:PSS. L'imprégnation constitue une sorte de réseau (14) qui contribue à réduire la résistance spécifique de la matière cellulosique, en raison de la conductivité électrique dudit réseau. La matière cellulosique peut de ce fait être adaptée avantageusement à des utilisations spécifiques en termes de propriétés électriques. Ladite manière cellulosique peut également servir à l'isolation électrique de transformateurs, ladite matière cellulosique étant alors imprégnée d'huile pour transformateurs, et l'adaptation de la résistance spécifique de la matière cellulosique à la résistance spécifique de l'huile induisant une meilleure résistance au claquage de l'isolation des transformateurs. L'invention concerne en outre un procédé pour produire la matière cellulosique décrite ci-dessus, qui présente une étape d'imprégnation appropriée pour la matière cellulosique.
PCT/EP2011/066011 2010-09-29 2011-09-15 Matière cellulosique soumise à imprégnation, utilisation de cette matière cellulosique et procédé pour la produire WO2012041714A1 (fr)

Applications Claiming Priority (2)

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DE102010041635.5 2010-09-29
DE102010041635A DE102010041635A1 (de) 2010-09-29 2010-09-29 Cellulosematerial mit Imprägnierung, Verwendung dieses Cellulosematerials und Verfahren zu dessen Herstellung

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WO2012041714A1 true WO2012041714A1 (fr) 2012-04-05

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Cited By (5)

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US9718934B2 (en) 2013-03-28 2017-08-01 Siemens Aktiengesellschaft Cellulose material having impregnation and use of the cellulose material
EP2661755B1 (fr) * 2011-01-07 2018-01-31 Siemens Aktiengesellschaft Dispositif d'isolation pour un composant de transmission de courant continu haute tension comportant des barrières aux solides de type paroi
EP3493222A1 (fr) 2017-11-29 2019-06-05 RISE Acreo AB Fabrication d'une feuille conductrice
EP2661523B1 (fr) * 2011-01-07 2019-09-04 Siemens Aktiengesellschaft Passage de conduite pour la paroi de cuve d'un composant de transmission de courant continu haute tension
EP3851563A1 (fr) 2020-01-17 2021-07-21 RISE Research Institutes of Sweden AB Filage de fibres conductrices

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DE102011008461A1 (de) 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Trennstelle einer Leitungsdurchführung für eine HGÜ-Komponente
DE102011008456A1 (de) 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Leitungsführung für HGÜ-Transformatorspulen oder HGÜ-Drosselspulen
DE102011008462A1 (de) 2011-01-07 2012-07-12 Siemens Aktiengesellschaft Schirmring für eine HGÜ-Transformatorspule oder eine HGÜ-Drosselspule

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2661755B1 (fr) * 2011-01-07 2018-01-31 Siemens Aktiengesellschaft Dispositif d'isolation pour un composant de transmission de courant continu haute tension comportant des barrières aux solides de type paroi
EP2661523B1 (fr) * 2011-01-07 2019-09-04 Siemens Aktiengesellschaft Passage de conduite pour la paroi de cuve d'un composant de transmission de courant continu haute tension
US9718934B2 (en) 2013-03-28 2017-08-01 Siemens Aktiengesellschaft Cellulose material having impregnation and use of the cellulose material
EP3493222A1 (fr) 2017-11-29 2019-06-05 RISE Acreo AB Fabrication d'une feuille conductrice
EP3493221A1 (fr) 2017-11-29 2019-06-05 RISE Acreo AB Procédé de fabrication d'une feuille conductrice
EP3851563A1 (fr) 2020-01-17 2021-07-21 RISE Research Institutes of Sweden AB Filage de fibres conductrices

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