EP0195257A2 - Câble en matière synthétique - Google Patents

Câble en matière synthétique Download PDF

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Publication number
EP0195257A2
EP0195257A2 EP86102070A EP86102070A EP0195257A2 EP 0195257 A2 EP0195257 A2 EP 0195257A2 EP 86102070 A EP86102070 A EP 86102070A EP 86102070 A EP86102070 A EP 86102070A EP 0195257 A2 EP0195257 A2 EP 0195257A2
Authority
EP
European Patent Office
Prior art keywords
polymer
plastic cable
cable according
polar
conductive
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Withdrawn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
EP86102070A
Other languages
German (de)
English (en)
Other versions
EP0195257A3 (fr
Inventor
Gert Dr. Dipl.-Chem. Weddigen
Hans-Joachim Dr. Dipl.-Chem. Böhme
Josef Dr. Dipl.-Chem. Flatz
Fritz Dr. Dipl.-Chem. Grieser
Robert Dr Dipl.-Phys. Huber
Hans Dr. Dipl.-Chem. Nienburg
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.)
BBC Brown Boveri AG Germany
Original Assignee
Brown Boveri und Cie AG Germany
BBC Brown Boveri AG Germany
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 Brown Boveri und Cie AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Publication of EP0195257A2 publication Critical patent/EP0195257A2/fr
Publication of EP0195257A3 publication Critical patent/EP0195257A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/027—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of semi-conducting layers

Definitions

  • the invention relates to a plastic cable with at least one electrical conductor, which is surrounded by a cable sheath which, in addition to at least one insulating layer, has a plurality of electrically conductive layers of a polymeric material.
  • Such plastic cables are preferably used in high-voltage systems with nominal voltages from 10 to more than 100 kV.
  • the multilayered conductor covering of these plastic cables has, in addition to the actual insulating layer, also conductive layers or tapes. They are intended to smooth the contours of the metallic conductors used in the cable and are intended to generate a radially homogeneous electrical field in the insulation.
  • the conductive layers are made of filled polyolefins, which together with in the same operation the insulation are extruded.
  • the conductivity of these polyolefins is caused by fillers such as carbon black and graphite.
  • Polymeric material with these additives has the disadvantage that, with a small proportion of these fillers, there is still no increase in conductivity, but from a certain amount of the additive the conductivity then increases so rapidly that a defined conductivity of the plastics cannot be reliably set in the area of interest . Even with the finest possible grain size of the fillers, field-distorting inhomogeneities can occur, which in particular lead to a reduction in the electrical strength of the cable.
  • the invention is therefore based on the object of providing a cable in which the electrically conductive layers consist of a polymeric material which can be set to a defined specific electrical conductivity and whose homogeneity guarantees an interference-free transition between the insulating layer and the conductive layer.
  • At least one electrically conductive layer is made of a polymer, a copolymer or a polymer alloy which is meltable and / or soluble and whose specific electrical conductivity can be adjusted to a defined value by means of a charge transfer complex is.
  • the inner conductive layer 51 is made of a polymer or a polymer alloy, the electrical conductivity of which is formed by charge transfer complexes.
  • the electrical conductivity of the polymeric material used can be easily and reliably set to a defined value.
  • a conductivity of at least 10 -5 ⁇ -1 cm -1 in particular a conductivity in the range of 10 -3 to 10 -1 ⁇ -1 cm -1, is advantageous.
  • Higher conductivities can be represented, but are neither required electrically nor economically advantageous.
  • the polymer materials according to the invention allow the production of particularly smooth interfaces, since they contain no fillers and are constructed very homogeneously.
  • a triaromatomethane polymer is preferably used as the conductive polymer.
  • the conductive polymer can also be used in the form of a copolymer or a polymer alloy, which is correspondingly formed from at least one insulating polymer and at least one conductive polymer.
  • the polymers or polymer alloys used should be meltable or soluble so that they can be processed accordingly.
  • the conductive polymer containing the electrically conductive layers 3 and 5 of the cable is formed, for example, in the polycondensation of an aromatic aldehyde and an aromatic ring compound which has at least one functional group which increases the electron density in the aromatic ring compound and thus the electrophilic attack favored.
  • This polymer can e.g. B. by the polycondensation of bisphenol-A and 4-dimethylaminobenzaldehyde are formed.
  • the synthetic polymer with triaromatomethane units as basic building blocks can also be produced by polycondensation of bisphenol A and paraanisaldehyde.
  • the polymer can also be obtained in a catalytic reaction in which methanes substituted with double and / or triple aromatics are reacted.
  • the electrical conductivity of this polymer is caused by the formation of charge transfer complexes.
  • electron acceptors and / or donors are added to the polymer during production or later in the dissolved or molten state.
  • Iodine, sulfur trioxide, sulfuric acid and iron chloride are particularly suitable as electron acceptors.
  • Sodium is suitable as an electron donor.
  • the electrical conductivity of this polymer can also be achieved by adding a mineral acid or a Lewis acid.
  • the polymer can be dissolved in acetone or methyl ethyl ketone.
  • the conductive layers 3 and 5 of the cable can also be produced from a conductive polymer alloy.
  • the polymer alloy is formed from a polar or non-polar, insulating polymer and a polar or non-polar, conductive polymer.
  • polar insulating polymers to form the polymer alloy polyvinyl chloride, polyester, preferably polybutylene terephthalate, an epoxy resin composition, polycarbonate, a Polyurethane resin or polyamide can be used.
  • Polyethylene and its copolymers, polybutadiene, polystyrene, butadiene styrene copolymers or acrylonitryl butadiene styrene copolymers are suitable as insulating polymers.
  • the conductive component of the polymer alloy is preferably formed by polar polymers based on triaromatomethane, which are doped with electron donors and / or electron acceptors.
  • the electron donors and acceptors specified above for the formation of the conductive polymer are suitable for this.
  • Copolymers of acetylene and / or acetylene derivatives doped with electron donors and / or electron acceptors to form charge transfer complexes can be used as the non-polar conductive component.
  • the production of a small amount of this material is described below.
  • 100 g of polyvinyl chloride in granulate form are mixed with 30 g of a plasticizer, for example a diisodecyl phthalate (DIDP), with 10 g of triaromatomethane polymer in powder form.
  • a plasticizer for example a diisodecyl phthalate (DIDP)
  • DIDP diisodecyl phthalate
  • This triaromatomethane polymer forms the conductive component and is doped accordingly.
  • the mixture thus formed is then pressed into a film at 150 ° C. for 20 minutes.
  • the doping of the triaromatomethane polymer is such that the specific electrical conductivity of the finished film which can be used for layer 5A is 10 -3 (ohm ⁇ cm) -1 at room temperature.
  • the materials used to form the electrically conductive layers 3 and 5 can preferably also be produced from a polymer alloy which are produced using an ethyl vinyl acetate-polyethylene copolymer and a doped triaromatomethane polymer.
  • a polymer alloy which are produced using an ethyl vinyl acetate-polyethylene copolymer and a doped triaromatomethane polymer.
  • 1000 g of the ethyl vinyl acetate-polyethylene copolymer in the form of granules are mixed at room temperature with 20% by weight of a triaromatomethane polymer.
  • the triaromatomethane polymer is doped accordingly to achieve a defined electrical conductivity.
  • the mixture thus formed is for coextrusion with a
  • the conductivity of the triaromatomethane polymer is such that the specific electrical conductivity of the layer is 3 ⁇ 10 -3 (ohm ⁇ cm) -1 at room temperature.
  • the conductive polymer alloy according to the invention or the conductive polymer which is used to produce the conductive layers 3 and 5 is an easily processable material which, with the insulating materials used, enables the formation of a permanent and void-free composite.
  • the electrically conductive layers 3 and 5 made of the polymer or the polymer alloy have properties not only in electrical but also in mechanical and thermal terms which make the intended use in the manufacture of the cables appear advantageous.
  • the invention is not limited to the embodiment shown in the description. Rather, it can also be used to produce cables with more than one conductor and the corresponding cable sheaths.
  • a single-layer structure of the outer conductive layer with the omission of the wrapping (5A) is also possible, or a combination with a conventional carbon black paper or the like as wrapping, which is thermally advantageous.

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Conductive Materials (AREA)
EP86102070A 1985-03-14 1986-02-18 Câble en matière synthétique Withdrawn EP0195257A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3509168 1985-03-14
DE19853509168 DE3509168A1 (de) 1985-03-14 1985-03-14 Kabel

Publications (2)

Publication Number Publication Date
EP0195257A2 true EP0195257A2 (fr) 1986-09-24
EP0195257A3 EP0195257A3 (fr) 1989-07-26

Family

ID=6265208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102070A Withdrawn EP0195257A3 (fr) 1985-03-14 1986-02-18 Câble en matière synthétique

Country Status (3)

Country Link
US (1) US4691082A (fr)
EP (1) EP0195257A3 (fr)
DE (1) DE3509168A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645781B2 (fr) † 1993-09-17 2000-06-07 Alcatel Cable Câble d'énergie à rigidité diélectrique améliorée

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3929450A1 (de) * 1989-09-05 1991-03-07 Kabel & Draht Gmbh Elektrofilterkabel
DE4138889A1 (de) * 1991-01-30 1992-08-13 Felten & Guilleaume Energie Roentgenleitung
US6127632A (en) * 1997-06-24 2000-10-03 Camco International, Inc. Non-metallic armor for electrical cable
US6417454B1 (en) 2000-06-21 2002-07-09 Commscope, Inc. Coaxial cable having bimetallic outer conductor
KR20120105843A (ko) * 2011-03-16 2012-09-26 엘에스전선 주식회사 고주파수용 전력 케이블

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878319A (en) * 1974-07-08 1975-04-15 Gen Electric Corona-resistant ethylene-propylene rubber insulated power cable
US4440669A (en) * 1979-03-20 1984-04-03 Allied Corporation Electrically conducting compositions of doped polyphenylenes and shaped articles comprising the same
IT1165292B (it) * 1979-08-30 1987-04-22 Pirelli Cavo elettrico perfezionato per medie tensioni
IT1135021B (it) * 1981-01-14 1986-08-20 Pirelli Cavi Spa Cavo elettrico perfezionato
US4419277A (en) * 1981-03-23 1983-12-06 Rohm And Haas Company Treated polyacetylene
US4486721A (en) * 1981-12-07 1984-12-04 Raychem Corporation High frequency attenuation core and cable
US4452727A (en) * 1982-06-28 1984-06-05 Allied Corporation Solution of a chalcogen-containing polymer and process of forming conducting polymer articles therefrom
US4487996A (en) * 1982-12-02 1984-12-11 Electric Power Research Institute, Inc. Shielded electrical cable
DE3248088A1 (de) * 1982-12-24 1984-06-28 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren zur herstellung eines polymers
GB8309362D0 (en) * 1983-04-06 1983-05-11 Ici Plc Conducting polymers
US4510076A (en) * 1983-11-23 1985-04-09 Gte Laboratories, Inc. Electrically conductive polymer blends of an acetylene polymer and a triblock thermoplastic elastomer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0645781B2 (fr) † 1993-09-17 2000-06-07 Alcatel Cable Câble d'énergie à rigidité diélectrique améliorée

Also Published As

Publication number Publication date
EP0195257A3 (fr) 1989-07-26
DE3509168A1 (de) 1986-09-18
US4691082A (en) 1987-09-01

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Inventor name: HUBER, ROBERT, DR, DIPL.-PHYS.

Inventor name: WEDDIGEN, GERT, DR. DIPL.-CHEM.

Inventor name: NIENBURG, HANS, DR. DIPL.-CHEM.

Inventor name: BOEHME, HANS-JOACHIM, DR. DIPL.-CHEM.

Inventor name: FLATZ, JOSEF, DR. DIPL.-CHEM.

Inventor name: GRIESER, FRITZ, DR. DIPL.-CHEM.