EP3244423A1 - Dreiadrige stromkabel mit kunststoffpanzerung - Google Patents

Dreiadrige stromkabel mit kunststoffpanzerung Download PDF

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Publication number
EP3244423A1
EP3244423A1 EP16305547.8A EP16305547A EP3244423A1 EP 3244423 A1 EP3244423 A1 EP 3244423A1 EP 16305547 A EP16305547 A EP 16305547A EP 3244423 A1 EP3244423 A1 EP 3244423A1
Authority
EP
European Patent Office
Prior art keywords
cable
power cable
cores
cable according
layer
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Withdrawn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
EP16305547.8A
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English (en)
French (fr)
Inventor
Hans Kvarme
Vegar Syrtveit LARSEN
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
Priority to EP16305547.8A priority Critical patent/EP3244423A1/de
Publication of EP3244423A1 publication Critical patent/EP3244423A1/de
Withdrawn legal-status Critical Current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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/1855—Sheaths comprising helical wrapped non-metallic layers

Definitions

  • the invention relates to impact resistant power cables, in particular to multipolar power cables, more particularly to three-core power cables.
  • Impact resistant multipolar cables are employed in a number of industries. Such cables provide protection against accidental impact to the cable.
  • the cables can provide distribution of low, medium or high voltage electrical power.
  • low voltage means voltage less than about 1 kV.
  • intermediate voltage means voltage between about 1kV - 36 kV.
  • high voltage means voltage greater than about 36 kV.
  • a particular type of cable known as a “steel wire armored cable” commonly abbreviated "SWA" is a hard wearing power cable designed for the supply of mains electricity. It is one type of a number of armored electrical cables, and is used in underground systems, power networks and subsea applications.
  • SWA is an armored three-core power cable, known to one skilled in the art of power cables.
  • Interstitial zone refers to the generally triangular shaped area defined by the space between two adjacent cores and the immediately opposing inner surface of the outer layer.
  • immediate opposing is meant the general area of the portion of the outer covering at a point that intersects the shortest segment of a line that is perpendicular to a line bisecting the two cores.
  • triangular is only meant in a general sense, as the opposing segment of the outer cover is obviously curved, as are the cores themselves.
  • An extruded plastic profile known as a "filler” is arranged to fill the interstitial zones and hold the three conductors in a relative position so as to maintain the cable's circular cross section.
  • a binder layer is often arranged about the filler, and a layer of wound metallic armoring wires is arranged between the binder and the outer covering.
  • the primary purpose of the metallic armoring wires in SWA cables is to provide impact resistance for the power cable.
  • the metallic armoring provides a benefit in terms of impact protection, the armoring has drawbacks.
  • the metallic armoring adds weight to the cable, as well as cost.
  • the metallic armoring causes a condition known as "armor loss", that can decrease the current rating of the cable. Armor loss occurs due to circulating currents in the armoring due to fluctuating electrical fields and due to charging current.
  • the current rating and current loss of three-core power cables is calculated using the IEC 60287 standard.
  • GB1497737 describes electrical conduits (ten «quads» 7) surrounded by plastic sheath 8.
  • the exterior has a metal sheath 9.
  • high tensile layer 10 which may comprise bundles of or untwisted yarns of high tensile plastic filaments.
  • the "high tensile" plastic filaments are not intended as impact resistant armoring, however, and the disclosed cable is not a three-core power cable.
  • the present invention has as its object to overcome the deficiencies of the prior art, in particular the disadvantages caused by metallic armoring wires, while providing a simple and cost effective arrangement for impact-resistant armoring in three-core power cables.
  • a three-core power cable is provided.
  • the cable has essentially the components and structure of a traditional three-core power cable.
  • the steel or metallic armoring wires are replaced, however, with elongated plastic members or rods.
  • elongated plastic member or “plastic rods” are meant to describe an elongated plastic member, similar in structure to a metallic armoring wire, albeit made from a plastic material.
  • the plastic rods are arranged along the length of the cable, in a twisted fashion similar to the manner in which metal armor wires are arranged about a SWA cable.
  • the cable comprises a plurality of elongated plastic fillers.
  • the fillers are preferably an extruded plastic material.
  • the plastic fillers have an interstices-filling portion and a curved outer surface, the curvature of the outer surface corresponding to the curvature of the cable.
  • the interstices-filling portion has two inner, curved surfaces.
  • the inner curved surfaces of adjacent fillers cooperate to form a semi-circular channel in which is arranged a core.
  • the fillers have a plurality of internal walls forming a honey-combed, cellular structure. The honey-combed structure reduces weight and provides structural integrity for the filler.
  • the binder layer surrounds the fillers, and the plastic rods are arranged intermediate the binder layer and the outer covering of the cable.
  • Figures 1 and 2 illustrate an embodiment of a cable according to the invention.
  • the cable is a three core power cable, for transmitting, high, medium or low voltage electrical power.
  • the cable comprises three cores 10 that comprise a conductor, insulation layers and the like, in a manner well known to one skilled in the art of power cables. While particular arrangement of the cores of a three-core power cable is illustrated, the arrangement of the cores may comprise different types and numbers of insulating and functional layers, known to one skilled in the art of power cables
  • the three cores 10 are arranged in the center of the cable, and the interstitial zones are filled by plastic fillers 12.
  • the fillers help, inter alia, to maintain the circular cross section of the cable.
  • the plastic fillers have an interstices-filling portion and a curved outer surface, the curvature of the outer surface corresponding to the curvature of the cable.
  • the interstices-filling portion has two inner, curved surfaces.
  • the inner curved surfaces of adjacent fillers cooperate to form a semi-circular channel in which is arranged a core.
  • the fillers have a plurality of internal walls forming a honey-combed, cellular structure. The honey-combed structure reduces weight and provides structural integrity for the filler.
  • honey-combed structure reduces weight and provides structural integrity for the filler.
  • An auxiliary cable 14, for example a fiber optic cable, may be arranged at the interior of the cable.
  • the armor elements 20 are elongated plastic filaments or rods, twisted about the cores as shown in figure 2 .
  • the plastic rods are arranged adjacent to one another, such that a protective barrier is formed about the cores.
  • the material and dimensions of the plastic rods are chosen so as to provide impact resistance to the cable for a given application.

Landscapes

  • Insulated Conductors (AREA)
EP16305547.8A 2016-05-11 2016-05-11 Dreiadrige stromkabel mit kunststoffpanzerung Withdrawn EP3244423A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16305547.8A EP3244423A1 (de) 2016-05-11 2016-05-11 Dreiadrige stromkabel mit kunststoffpanzerung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16305547.8A EP3244423A1 (de) 2016-05-11 2016-05-11 Dreiadrige stromkabel mit kunststoffpanzerung

Publications (1)

Publication Number Publication Date
EP3244423A1 true EP3244423A1 (de) 2017-11-15

Family

ID=56098185

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16305547.8A Withdrawn EP3244423A1 (de) 2016-05-11 2016-05-11 Dreiadrige stromkabel mit kunststoffpanzerung

Country Status (1)

Country Link
EP (1) EP3244423A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020081955A1 (en) * 2018-10-18 2020-04-23 Saudi Arabian Oil Company Power cable with non-conductive armor
CN113793722A (zh) * 2021-08-21 2021-12-14 陈万周 一种钢丝铠装电力电缆
CN114300193A (zh) * 2021-12-29 2022-04-08 安徽森联信息科技有限公司 一种可三网融合同时使用的复合缆
CN116230299A (zh) * 2023-04-14 2023-06-06 叶曹世 一种阻燃型电力电缆及其加工***与加工方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2516472B1 (de) 1975-04-15 1976-09-16 Felten & Guilleaume Carlswerk Elektrisches Hochspannungs-Hochfrequenz-Impuls-Seekabel,insbesondere zur Abschreckung von Haifischen
GB1497737A (en) 1974-07-10 1978-01-12 Felten & Guilleaume Kabelwerk Electric cables with tension-supporting elements
WO2012049508A1 (en) * 2010-10-12 2012-04-19 Artificial Lift Company Limited Armoured cable for down hole electrical submersible pump
WO2014202141A1 (en) * 2013-06-19 2014-12-24 Abb Technology Ltd A power cable assembly device and a power cable provided with such a device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1497737A (en) 1974-07-10 1978-01-12 Felten & Guilleaume Kabelwerk Electric cables with tension-supporting elements
DE2516472B1 (de) 1975-04-15 1976-09-16 Felten & Guilleaume Carlswerk Elektrisches Hochspannungs-Hochfrequenz-Impuls-Seekabel,insbesondere zur Abschreckung von Haifischen
WO2012049508A1 (en) * 2010-10-12 2012-04-19 Artificial Lift Company Limited Armoured cable for down hole electrical submersible pump
WO2014202141A1 (en) * 2013-06-19 2014-12-24 Abb Technology Ltd A power cable assembly device and a power cable provided with such a device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020081955A1 (en) * 2018-10-18 2020-04-23 Saudi Arabian Oil Company Power cable with non-conductive armor
CN113793722A (zh) * 2021-08-21 2021-12-14 陈万周 一种钢丝铠装电力电缆
CN113793722B (zh) * 2021-08-21 2024-04-09 广州市明兴电缆有限公司 一种钢丝铠装电力电缆
CN114300193A (zh) * 2021-12-29 2022-04-08 安徽森联信息科技有限公司 一种可三网融合同时使用的复合缆
CN114300193B (zh) * 2021-12-29 2024-03-08 付国平 一种可三网融合同时使用的复合缆
CN116230299A (zh) * 2023-04-14 2023-06-06 叶曹世 一种阻燃型电力电缆及其加工***与加工方法
CN116230299B (zh) * 2023-04-14 2023-12-08 江苏远方电缆厂有限公司 一种阻燃型电力电缆及其加工***与加工方法

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