EP0949636B1 - Mehrschichtiger Leiter mit reduziertem Skin-Effekt - Google Patents

Mehrschichtiger Leiter mit reduziertem Skin-Effekt Download PDF

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Publication number
EP0949636B1
EP0949636B1 EP19990400692 EP99400692A EP0949636B1 EP 0949636 B1 EP0949636 B1 EP 0949636B1 EP 19990400692 EP19990400692 EP 19990400692 EP 99400692 A EP99400692 A EP 99400692A EP 0949636 B1 EP0949636 B1 EP 0949636B1
Authority
EP
European Patent Office
Prior art keywords
conductor
wires
layers
insulating tapes
conductor wires
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.)
Expired - Lifetime
Application number
EP19990400692
Other languages
English (en)
French (fr)
Other versions
EP0949636A1 (de
Inventor
José Bezille
Pascal Deguines
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.)
Nexans SA
Original Assignee
Nexans SA
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 Nexans SA filed Critical Nexans SA
Publication of EP0949636A1 publication Critical patent/EP0949636A1/de
Application granted granted Critical
Publication of EP0949636B1 publication Critical patent/EP0949636B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/30—Insulated conductors or cables characterised by their form with arrangements for reducing conductor losses when carrying alternating current, e.g. due to skin effect
    • H01B7/303—Conductors comprising interwire insulation

Definitions

  • the present invention relates to a multilayer conductor with skin effect reduced, for power cable, this conductor comprising several layers of wires superimposed conductors and insulating tapes arranged between the different layers of wires.
  • the article "Inter-Layer Insulated Milliken Type Conductor with Low Skin Effect for Power Cables” published in Hitachi Vol. 30 (1981), No. 1, discloses a such conductor with reduced skin effect.
  • the conductor is segmented and includes six sector-shaped segments which are juxtaposed. Each segment has several layers of conductive wires, which are bare conductive wires and whose layers are then separated by insulation between two superimposed layers, or all of which can be enamelled for wire-to-wire and layer-to-layer insulation resultant.
  • the insulation is advantageously constituted by a cellulose paper tape, to satisfy the requirements of high resistance mechanical, high resistance to swelling or solubility, high stability thermal and easy splicing of the conductor and low cost, required for this isolation.
  • the cellulose paper strip allows in particular a splicing or termination of the conductor by compression without it being necessary remove the inter-layer insulating tapes over a certain length beforehand, due to their rupture by compression of the conductor.
  • the debris from the insulating tapes which results from their compression, may cause changes in electrical characteristics expected at the splicing or termination level.
  • this driver does not allow the use of other methods splicing or termination, in particular a welding method such as that known under the Cadwell process, often preferred but requiring by against first removing the inter-layer insulating tape on a certain length at the end of the conductor for correct welding.
  • a welding method such as that known under the Cadwell process
  • the object of the present invention is to avoid the drawbacks of such a known multilayer conductor.
  • a multilayer conductor with reduced skin effect, for power cable comprising several layers of conducting wires superimposed some on the wineskins and insulating tapes between said layers of conductive wires, characterized in that said insulating tapes are laid lengthwise and contain a substantially uniform elongation preload over the length of the driver.
  • Figures 1 and 2 show a multilayer conductor 1 and a segment 2 of crossover and multilayer conductors, respectively, which have several layers of conductive wires 3 and insulating tapes 4 each separating one of the layers of wires from another superimposed on the previous one.
  • the layers of superimposed conductive wires are sectoral.
  • the layers of superimposed conductive wires are concentric.
  • Figure 3 schematically illustrates the conductor aforementioned multilayer or the aforementioned segment, in accordance with the present invention. Bare conductive wires and insulating tapes have been designated under the same references 3 and 4 as in Figures 1 and 2.
  • the insulating tapes 4 between the different layers of wires nudes 3 contain an elongation preload, which is substantially uniform over the entire length of the conductor or segment concerned.
  • Each of these ribbons is laid lengthwise on the layer of son that it covers. Its prestress elongation is given by the material of the ribbon chosen in material heat-shrinkable and laid stretched or is given by the material of the ribbon chosen in elastic material and placed under controlled mechanical tension.
  • This elongation preload of the insulating tapes 4 allows each cuts the conductor a controlled and reproducible removal of the insulation tapes the cutting end, as shown schematically by the arrow 5 in this figure 3.
  • the multilayer segment illustrated in FIG. 4 is an embodiment optimized. It has conductive wires, which are wired in sector layers superimposed and are alternately naked and then designated under the reference 3 above and enamelled and then designated under the reference 6 in each of layers, and 4 insulating tapes between the different layers, which are retractable like the insulating tapes 4 of FIG. 3.
  • the bare wires 3 and the wires enamelled 4 were simply distinguished from each other by the hatching in one direction for the former and hatching in another direction for the other.
  • the bare wires 3 and the wires 6 before enameling are wires identical, of the same diameter.
  • the enamel covering the wires 6 increases only very little the diameter of these.
  • the section differences between bare wires 3 and enamelled wires 6 are absorbed in the wiring of the layers of wires.
  • the wiring of the layers of wires is done helically, alternately left and right.
  • the alternation of naked sons and enamelled avoids metal-to-metal contact between wires of the same layer, while the insulating tape 4 avoids metal-to-metal contact between wires of adjacent layers superimposed. It follows that the resulting multilayer conductor is of realization optimized to also have a reduced proximity effect.
  • the multilayer conductor segmented comprises an intermediate ribbon, arranged between two adjacent segments.
  • This intermediate tape can be a retractable insulating tape like the tapes 4 between layers.
  • it may be a conventional insulating tape, that is to say not shrink, in particular in paper, the removal of which over a certain length at the end of the conductor then poses no particular problem due to a slight natural development or easy to obtain terminal portions of segments.
  • this intermediate strip may be a semiconductor strip.
  • the multilayer conductor, segmented or not, produced in accordance with the invention is itself coated with a semiconductor layer preferably helically banded on the peripheral layer of the conductor, for producing an energy cable comprising this conductor.

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  • Insulated Conductors (AREA)

Claims (6)

  1. Mehrlagiger Leiter mit reduziertem Skineffekt für Energiekabel, umfassend mehrere Lagen von übereinander gelagerten leitenden Drähten und Isolierbändern zwischen den Schichten von leitenden Drähten, dadurch gekennzeichnet, dass die Isolierbänder (4) längs verlegt sind und eine im Wesentlichen über die Länge des Leiters einheitliche Verlängerungsvorspannung enthalten.
  2. Leiter nach Anspruch 1, dadurch gekennzeichnet, dass die Isolierbänder (4) aus einem elastischen Material bestehen und unter Spannung verlegt werden, und zwar jedes auf der Schicht von leitenden Drähten (3, 6), die von ihm überzogen ist.
  3. Leiter nach Anspruch 1, dadurch gekennzeichnet, dass die Isolierbänder (4) aus einem Wärmeschrumpf-Material bestehen und gespannt verlegt werden, und zwar jedes auf der Schicht von leitenden Drähten (3, 6), die von ihm überzogen ist.
  4. Leiter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass er mehrere mehrlagige Segmente (2) umfasst, die eine Kreisausschnittform aufweisen und nebeneinander gelegt sind, wobei die leitenden Drähte (3, 6) in jedem Segment in Sektorschichten, die überlagert und durch die Isolierbänder (4) getrennt sind, angeordnet sind.
  5. Leiter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die leitenden Drähte in jeder der Schichten abwechselnd blanke leitende Drähte (3) und leitende Lackdrähte (6) sind.
  6. Leiter nach Anspruch 5, dadurch gekennzeichnet, dass die leitenden Drähte (3, 6) im Wesentlichen den gleichen Durchmesser aufweisen.
EP19990400692 1998-04-09 1999-03-22 Mehrschichtiger Leiter mit reduziertem Skin-Effekt Expired - Lifetime EP0949636B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9804431A FR2777383B1 (fr) 1998-04-09 1998-04-09 Conducteur multicouche a effet de peau reduit
FR9804431 1998-04-09

Publications (2)

Publication Number Publication Date
EP0949636A1 EP0949636A1 (de) 1999-10-13
EP0949636B1 true EP0949636B1 (de) 2003-12-17

Family

ID=9525046

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990400692 Expired - Lifetime EP0949636B1 (de) 1998-04-09 1999-03-22 Mehrschichtiger Leiter mit reduziertem Skin-Effekt

Country Status (2)

Country Link
EP (1) EP0949636B1 (de)
FR (1) FR2777383B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008031337B3 (de) * 2008-07-02 2010-04-01 Nkt Cables Gmbh Elektrisches Sekorleiterlabel vom Millikentyp
DE102008045553A1 (de) 2008-09-03 2010-03-04 Dürr Systems GmbH Lackiereinrichtung und zugehöriges Verfahren

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB724337A (en) * 1952-04-14 1955-02-16 Sumitomo Electric Industries High frequency electric conductor
DE19520587A1 (de) * 1995-06-06 1996-12-12 Siemens Ag Wechselstromkabel mit zwei konzentrischen Leiteranordnungen aus verseilten Einzelleitern

Also Published As

Publication number Publication date
FR2777383B1 (fr) 2000-05-12
FR2777383A1 (fr) 1999-10-15
EP0949636A1 (de) 1999-10-13

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