EP0734030A1 - Verdrilltes Flachkabel - Google Patents

Verdrilltes Flachkabel Download PDF

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Publication number
EP0734030A1
EP0734030A1 EP96610009A EP96610009A EP0734030A1 EP 0734030 A1 EP0734030 A1 EP 0734030A1 EP 96610009 A EP96610009 A EP 96610009A EP 96610009 A EP96610009 A EP 96610009A EP 0734030 A1 EP0734030 A1 EP 0734030A1
Authority
EP
European Patent Office
Prior art keywords
cable
flat
conductors
approximately
manner
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.)
Granted
Application number
EP96610009A
Other languages
English (en)
French (fr)
Other versions
EP0734030B1 (de
Inventor
Jens Thor Christensen
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.)
NKT Cables AS
Original Assignee
NKT Cables AS
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 NKT Cables AS filed Critical NKT Cables AS
Publication of EP0734030A1 publication Critical patent/EP0734030A1/de
Application granted granted Critical
Publication of EP0734030B1 publication Critical patent/EP0734030B1/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
    • H01B7/08—Flat or ribbon cables
    • H01B7/0892—Flat or ribbon cables incorporated in a cable of non-flat configuration

Definitions

  • the present invention relates to a power cable for carrying heavy current and shaped as a flat cable which can be folded and retained as a substantially round cable, said cable comprising a ribbon of an insulating material which surrounds a plurality of interspaced, parallel, solid, electric conductors.
  • GB Patent Application No. GB-A-2,241,374 describes a folded flat elongate structure, and more specifically a flat cable folded over where the conductors are twisted in alternate direction of twisting.
  • the bi-directionally twisted cable is formed by a wavy or zigzag flat cable, where the zigzag shape represents the basis of shaping the coiled cable with two directions of twisting.
  • the publication does not describe how the flat cable is retained in its closed round shape, but only that the flat cable shown can form part of a composite coaxial cable in form of one layer among several layers.
  • the cable is a low power and/or optical fibre cable.
  • DE-A-3,141,636 discloses a cable in which at least one flat cable is helically wound round a coaxial cable forming a central core in such a manner that the flat cable can be installed with the advantages obtained by means of a round cable.
  • the illustrated type of cable can include a high number of conductors, and it is for instance shown as a cable with 15 conductors and 11 conductors intended for low power signals.
  • Flat cables to be rolled up are furthermore described inter alia in international Patent Application No. WO 90/08388.
  • Flat cables of a similar type have also been described in the European Patent Applications Nos. EP-A-0,257,855, and EP-A2-0,619,583, and in the German Patent Specifications Nos. DE 3,417,400 C2, DE 3,921,032 A1, DE 3,527,846 A1, and DE 3,527,847 A1.
  • Round cables are preferred to flat cables when laying electric cables in connection with electric installations in buildings, inter alia because it is easier to drill a round hole than to produce an elongate slit for a flat cable when said cable is to pass through a wall or a horizontal division. Furthermore it is much easier to change the direction of a round cable than of a flat cable, especially when a horizontal change follows immediately after a vertical change.
  • the establishing of branches for lamps and socket outlets involves, however, a demand for a possibility of using piercing modules structured for flat cables. Accordingly, a demand applies for a flat cable which can be folded into a substantially round cable, and which is easy to open and roll out into a flat shape over a short length of the cable on the locations where it is desired to mount piercing modules.
  • the object of the invention is to provide a cable of the above type which is folded into a substantially round cable, which is easy to install in buildings and consequently easy to use for installing electrics, which is easy to operate with and inexpensive to manufacture. It must be possible to open and flatten the cable, preferably without necessitating the use of tools.
  • the resulting cable is retained in the folded state by the rigidity of the solid conductors and the plastic insulation, and at the same time the cable is particularly easy to open and to terminate.
  • a further advantage is found in the fact that it is easy to remove a previously performed termination and to restore the original shape of the cable. As a result, the cable need not be discarded in connection with minor rebuilding procedures.
  • the spiralling is preferably performed in such a manner that each conductor in a spiralled cable forms an angle of approximately 20° to 40° with the central axis of the cable.
  • a cable 10 according to the invention comprises according to a preferred embodiment a plurality (usually five) of solid conductors 12 with an insulation 13, cf. Figures 1 to 5.
  • the insulation 13 is surrounded by an insulating material 14 to form a coherent flexible ribbon.
  • the flexible ribbon may be made of plastics, and during the manufacturing process it is folded into a helical shape, preferably in such a manner that the cable is turned one turn for every approximately 100 to 1000 mm, preferably for every 200 to 600 mm, and especially for every approximately 300 mm, in case of a cable being fully insulated for operation and intended to work at a rated voltage of 220 volt to 1 kV and having solid conductors of a square of 2.5 mm 2 .
  • Such a cable may be provided with an inner and outer insulation which result in a final ribbon being approximately 40 mm wide and approximately 6 mm high. In other words, when considered separately the diameter of each insulated conductor is approximately 6 mm. It is, however, within the scope of the invention to use a cable of other dimensions. It is for instance possible to use conductors of a square of up to 6 mm 2 .
  • the criterion of the choice of number of helical windings per length unit, or in other words of the angle formed by each conductor with the central axis of the cable is that said cable must be wound so tightly that it forms a closed surface during the spiralling process, but nevertheless so loose that it is easy to turn it further (increase the number of turns per meter) without forming a second greater spiral.
  • the latter feature is necessary when units are to be mounted on the completely laid cable, which must therefore be folded out and flattened over a portion.
  • the flattening procedure implies that the helical windings of the adjacent lengths of cable can be arranged very close to one another.
  • FIG. 1 A preferred embodiment of the spiralled cable appears from Figure 1, in which the portions 21 and 24 of the cable are shown with helical windings, and the portions 22 to 23 are unfolded and provided with a piercing module 25 (as described in PCT/DK/94/00385, where voltage carrying conductors extend from said module and can be connected to various plugs and plug outlets).
  • a piercing module 25 as described in PCT/DK/94/00385, where voltage carrying conductors extend from said module and can be connected to various plugs and plug outlets.
  • the helical windings appearing from Figure 1 are arranged more close to the adjacent inserted piercing module because the unfolding of the portion of cable to be flattened for the mounting of the piercing module (or another device to be mounted on cables) implies that said helical windings of the adjacent portions are more closely arranged because the adjacent portions must absorb the helical winding which is pushed aside by the unfolding.
  • the resulting cable is very easy to open and to terminate.
  • a further advantage is found in the fact that it is easy to remove a previously performed termination and to restore the cable in its original shape. As a result, the cable need not be discarded in connection with minor rebuildings.
  • the manufacture of the cable involves the following steps. First the flat cable is made of a plurality of solid conductors 12, onto which an insulating jacket 13 is initially applied according to a preferred embodiment. Subsequently, the conductors 12 are carried in parallel at predetermined mutual distances through an extruder which provides the five conductors with a coherent flat jacket 14 so as to form the flat cable.
  • the spiralled cable can optionally be provided with a screen and/or an inserted corrugated drain wire.
  • the electric conductors 12 can be of 0.75 to 6 mm 2 and typically for instance of a diameter of approximately 1 to 2 mm and be surrounded by an insulation 13 of an outer diameter of approximately 3 to 4 mm.
  • the insulated conductors are then further coated with an insulating plastics, which for instance can be of a thickness of from approximately 0.2 mm to approximately 3 mm so as to form a coherent ribbon. It must, however, be understood that the invention is not limited to the illustrated and described dimensions, and that the number of conductors for instance can be 3, 4 or 5.
  • the insulated conductors 12 have the same dimensions as above and are spaced the same mutual distances.
  • the surrounding plastics 14 forming the coherent ribbon is in this embodiment somewhat thinner than the ribbon of Figures 2 and 3.
  • the resulting cable is particularly easy to work with because it is very flexible and easy to penetrate by means of a cutting contact means in connection with the mounting in piercing modules.
  • the cavity inside the folded cable is larger than in the first embodiment, which is obvious from a comparison of Figures 3 and 5.
  • the cavity 30 at the centre of the coiled flat cable 10 can remain empty or may be used for carrying a data cable, a signal cable or an optical fibre cable.
  • the cavity can optionally be screened on the inner side, or the said cables may be inserted in a screen.
  • the cavity can optionally be filled with a filler string, such as a plastic string.
  • One or more of the insulating electric conductors 12 can be provided either individually or all together with a screen.
  • the screen can be folded/coiled/extruded/plaited or coated.
  • the screen can be accommodated on the inner and/or outer side seen relative to the folded cable.
  • the folded flat cable can optionally be surrounded by an extruded jacket cut up and removed on the locations where access is desired to the flat cable.
  • the folded cable can be provided with auxiliary means, such as rings, resilient means or ribbons of plastics arranged at suitable intervals and intended to assist in maintaining the cable pressed into its round shape.
  • auxiliary means such as rings, resilient means or ribbons of plastics arranged at suitable intervals and intended to assist in maintaining the cable pressed into its round shape.

Landscapes

  • Insulated Conductors (AREA)
  • Flexible Shafts (AREA)
EP19960610009 1995-03-22 1996-03-21 Verdrilltes Flachkabel Expired - Lifetime EP0734030B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO951104A NO300347B1 (no) 1995-03-22 1995-03-22 Kabel
NO951104 1995-03-22

Publications (2)

Publication Number Publication Date
EP0734030A1 true EP0734030A1 (de) 1996-09-25
EP0734030B1 EP0734030B1 (de) 1999-09-29

Family

ID=19898043

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960610009 Expired - Lifetime EP0734030B1 (de) 1995-03-22 1996-03-21 Verdrilltes Flachkabel

Country Status (4)

Country Link
EP (1) EP0734030B1 (de)
DE (1) DE69604432T2 (de)
DK (1) DK0734030T3 (de)
NO (1) NO300347B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855721A1 (de) * 1997-01-27 1998-07-29 Alcatel Faseroptisches Kabel
EP0961298A1 (de) * 1998-05-29 1999-12-01 W.L. GORE & ASSOCIATES GmbH Drahtbündel für elektrische Signale
WO2000024009A1 (en) * 1998-10-16 2000-04-27 Abb Ab Cable set intended for manipulators
EP2070094A1 (de) * 2006-10-02 2009-06-17 Atlas Copco Tools Ab Mehrfachleiterkabel für ein tragbares elektrisches wekrzeug
CN110781563A (zh) * 2019-09-25 2020-02-11 重庆泰山电缆有限公司 电缆芯体截面设计方法、导体组件、电缆芯体及电缆

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609216A (en) * 1970-06-26 1971-09-28 Surprenant Inc Twisted cable
CH543800A (de) * 1972-10-05 1973-10-31 Sprecher & Schuh Ag Mehradriges, abgeschirmtes Kabel
US4767891A (en) * 1985-11-18 1988-08-30 Cooper Industries, Inc. Mass terminable flat cable and cable assembly incorporating the cable
US4992625A (en) * 1988-01-27 1991-02-12 Oki Densen Kabushiki Kaisha Ribbon cable with sheath
EP0642138A1 (de) * 1993-09-01 1995-03-08 Schneider Electric Sa Flachkabel mit mindestens zwei Leitern in einem isolierenden Mantel eingebettet

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3609216A (en) * 1970-06-26 1971-09-28 Surprenant Inc Twisted cable
CH543800A (de) * 1972-10-05 1973-10-31 Sprecher & Schuh Ag Mehradriges, abgeschirmtes Kabel
US4767891A (en) * 1985-11-18 1988-08-30 Cooper Industries, Inc. Mass terminable flat cable and cable assembly incorporating the cable
US4992625A (en) * 1988-01-27 1991-02-12 Oki Densen Kabushiki Kaisha Ribbon cable with sheath
EP0642138A1 (de) * 1993-09-01 1995-03-08 Schneider Electric Sa Flachkabel mit mindestens zwei Leitern in einem isolierenden Mantel eingebettet

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855721A1 (de) * 1997-01-27 1998-07-29 Alcatel Faseroptisches Kabel
FR2758892A1 (fr) * 1997-01-27 1998-07-31 Alsthom Cge Alcatel Cable a fibres optiques
US6173101B1 (en) 1997-01-27 2001-01-09 Alcatel Fiber optic cable
EP0961298A1 (de) * 1998-05-29 1999-12-01 W.L. GORE & ASSOCIATES GmbH Drahtbündel für elektrische Signale
WO2000024009A1 (en) * 1998-10-16 2000-04-27 Abb Ab Cable set intended for manipulators
EP2070094A1 (de) * 2006-10-02 2009-06-17 Atlas Copco Tools Ab Mehrfachleiterkabel für ein tragbares elektrisches wekrzeug
EP2070094A4 (de) * 2006-10-02 2012-09-26 Atlas Copco Tools Ab Mehrfachleiterkabel für ein tragbares elektrisches wekrzeug
CN110781563A (zh) * 2019-09-25 2020-02-11 重庆泰山电缆有限公司 电缆芯体截面设计方法、导体组件、电缆芯体及电缆
CN110781563B (zh) * 2019-09-25 2023-03-31 重庆泰山电缆有限公司 电缆芯体截面设计方法、导体组件、电缆芯体及电缆

Also Published As

Publication number Publication date
NO951104D0 (no) 1995-03-22
NO300347B1 (no) 1997-05-12
DE69604432D1 (de) 1999-11-04
DE69604432T2 (de) 2000-03-16
NO951104L (no) 1996-09-23
EP0734030B1 (de) 1999-09-29
DK0734030T3 (da) 2000-02-28

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