EP2713374A1 - Hochleistung feuerbeständiges vieladriges Kabel - Google Patents

Hochleistung feuerbeständiges vieladriges Kabel Download PDF

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Publication number
EP2713374A1
EP2713374A1 EP20130175372 EP13175372A EP2713374A1 EP 2713374 A1 EP2713374 A1 EP 2713374A1 EP 20130175372 EP20130175372 EP 20130175372 EP 13175372 A EP13175372 A EP 13175372A EP 2713374 A1 EP2713374 A1 EP 2713374A1
Authority
EP
European Patent Office
Prior art keywords
conductors
cable
electrical cable
outer sheath
cable according
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Withdrawn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
EP20130175372
Other languages
English (en)
French (fr)
Inventor
Franck Gyppaz
Arnaud Piechaczyk
Christof Dinkelmeyer
Jérôme Fournier
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 EP2713374A1 publication Critical patent/EP2713374A1/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Withdrawn legal-status Critical Current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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame

Definitions

  • the invention relates to a multicore cable with high fire performance. More specifically, such a cable is dimensioned in particular to slow the spread of fire.
  • Fire-resistant cables exist and have already been patented.
  • the cables according to the invention are configured to be effective vis-à-vis a fire, slowing down the propagation of flames, while maintaining good flexibility in all directions, to facilitate their implementation in an installation. They are easier to handle and transport because of their lightness, and are inexpensive because of a reduction in the amount of material involved in their outer shell.
  • the invention relates to an electrical cable comprising at least three non-aligned conductors and a common outer sheath surrounding said three conductors.
  • the main characteristic of a cable according to the invention is that each conductor is in contact with at least two other conductors, and that the outer sheath closely follows the shape of the conductors by having bumps and grooves, said sheath representing the layer the outermost of said cable.
  • the conductors are not arranged with each other in a flat arrangement, for which all the conductors would be aligned in the same plane. On the contrary, they are arranged in a compact manner so that the cross-section of the cable is substantially circular.
  • Such a cable may in particular have a conductor in the central position.
  • the outer outer sheath is dimensioned to the fair, and therefore tightly enclose the drivers by marrying their shape.
  • This sheath therefore has a reduced thickness around and between the conductors, compared to that which would have a bulky sheath, in which the conductors would be embedded.
  • a cable according to the invention has good flexibility in all directions of space, unlike a flat conductor arrangement. It can therefore be implanted in a facility with great flexibility of handling.
  • the electric cables according to the invention are configured to slow the spread of a fire. Such a thickness therefore gives said cables a high security character.
  • a thin outer sheath tends to lighten the cable, and is therefore an undeniable asset for the transport and handling phases.
  • the conductors are conventional, and may for example be made of copper.
  • the outer profile of the sheath is rugged to account for the presence of drivers. It should be noted that the outer outer sheath is the outermost layer of the cable, and that the bumps and grooves are visible from outside the cable.
  • the bumps and grooves are parallel and extend in a longitudinal direction of said cable, each bump corresponding to a conductor. It is important to emphasize that the grooves correspond to retracted parts of the sheath, and which are located further back than would be a sheath tensioned between said conductors. These grooves are thus hollow parts of the sheath.
  • the cable has a cross section formed alternately by rounded protuberances corresponding to the bumps, and by recessed areas embodying the grooves.
  • the cross section of the cable to a star-shaped profile whose parts protruding correspond to the drivers.
  • the recessed areas are hollow areas corresponding to the interstices between the drivers. In other words, not only the outer sheath closely matches the shape of the conductors but also the areas between said conductors.
  • the recessed areas of the sheath have a rounded profile.
  • the curvature of these recessed zones is opposite to that corresponding to the outline of the conductors, so that the circumference of the cable is sinusoidal.
  • Such a cable has a softened outer surface, without striking breakage and is therefore unlikely to rupture or accidental cutting.
  • the recessed areas have an angled profile materialized by a ridge bottom.
  • Such a cable has an outer surface with a rugged terrain, including these angle returns marking the interstices between the conductors.
  • Such a configuration favors a small amount of material for the outer sheath.
  • the common outer sheath has a constant thickness around the conductors.
  • each conductor is surrounded by an individual insulating layer.
  • the common outer sheath encloses the individual insulating layers of each cable, being in contact with them.
  • the common outer sheath comprises a flame retardant filler.
  • a flame retardant filler increases the non-propagation properties of the fire of a cable according to the invention.
  • the flame retardant filler comprises a metal hydroxide.
  • the cable comprises at most seven straight conductors.
  • This particular embodiment excludes configurations for which the conductors are twisted or wound in any way whatsoever, around each other.
  • the cables according to the invention have the advantage of possessing proven properties of non-propagation of the flame or fire, while maintaining flexibility in all directions, allowing them to be easily wrapped around a support coil, or to be handled with ease when they are installed in an installation. They also have the advantage of being light and can be transported in large quantities, without particular difficulty. Finally, they have the advantage of being inexpensive because of the small thickness of the outer casing, requiring only a small amount of material.
  • a first preferred embodiment of a cable 1 comprises three copper conductors 2, each surrounded by an individual insulating layer 3.
  • This insulating layer 3 is preferably made of polymer, and the three conductors 2 are placed in the cable 1, so that each individual layer 3 is in contact with the other individual layers 3.
  • the three conductors 2 are regularly distributed around a circle, making an angle of 120 ° between them.
  • These conductors 2 are rectilinear and parallel to each other, and are placed in a common outer sheath 4 constituting the outermost layer of the cable 1.
  • This common outer sheath 4 comprises a flame-retardant filler preferably made from a metal hydroxide, such as for example aluminum trihydroxide or magnesium dihydroxide.
  • This sheath 4 encloses the three conductors 2 bearing against their insulating layer 3, said sheath 4 closely matching the shape of said individual layers 3.
  • the outer sheath of the cable 1 has three rounded protuberances 5 protruding radially from the cable 1, and located at 120 ° from each other, each of said protuberances 5 corresponding to a conductor 2 which emerges laterally from the cable 1.
  • the outer outer sheath 4 of the cable 1 is alternately constituted by a plurality of bumps 5 and grooves 6 arranged in parallel and extending along a longitudinal axis of the cable 1.
  • the central portion 7 of the cable 1, which is delimited by the three conductors 2, provides a free space between said conductors 2.
  • a second preferred embodiment of a cable 10 according to the invention differs from the first mode described above in that the recessed areas 16 are not rounded, but terminate in an edge 17, marking a clear break of the relief of said sheath 14 at the interstices separating the conductors 2.
  • these recessed areas 16 are much more marked and allow the outer outer sheath to have a substantially constant thickness all around the cable 10, both at each conductor 2 at the level of each gap between two conductors 2. All other structural, dimensional and geometric characteristics are retained between the two embodiments described above.
  • This second embodiment favors an outer sheath as light as possible, having a uniform thickness all around the circumference of the cable.

Landscapes

  • Insulated Conductors (AREA)
EP20130175372 2012-09-28 2013-07-05 Hochleistung feuerbeständiges vieladriges Kabel Withdrawn EP2713374A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1259212A FR2996349B1 (fr) 2012-09-28 2012-09-28 Cable multiconducteur a haute performance contre le feu

Publications (1)

Publication Number Publication Date
EP2713374A1 true EP2713374A1 (de) 2014-04-02

Family

ID=47356130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20130175372 Withdrawn EP2713374A1 (de) 2012-09-28 2013-07-05 Hochleistung feuerbeständiges vieladriges Kabel

Country Status (2)

Country Link
EP (1) EP2713374A1 (de)
FR (1) FR2996349B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118380196A (zh) * 2024-05-14 2024-07-23 湖北洪乐电缆股份有限公司 一种稀土铝合金电力电缆及生产工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654867A1 (fr) * 1989-11-23 1991-05-24 Fressynet Eric Cable electrique apte a assurer un service electrique minimum pendant un incendie meme directement soumis a une flamme.
US20080073105A1 (en) * 2006-09-21 2008-03-27 Clark William T Telecommunications cable
US20090133897A1 (en) * 2005-07-29 2009-05-28 Thierry Jorand Substantially flat fire-resistant safety cable

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2654867A1 (fr) * 1989-11-23 1991-05-24 Fressynet Eric Cable electrique apte a assurer un service electrique minimum pendant un incendie meme directement soumis a une flamme.
US20090133897A1 (en) * 2005-07-29 2009-05-28 Thierry Jorand Substantially flat fire-resistant safety cable
US20080073105A1 (en) * 2006-09-21 2008-03-27 Clark William T Telecommunications cable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118380196A (zh) * 2024-05-14 2024-07-23 湖北洪乐电缆股份有限公司 一种稀土铝合金电力电缆及生产工艺

Also Published As

Publication number Publication date
FR2996349B1 (fr) 2014-09-19
FR2996349A1 (fr) 2014-04-04

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