EP0895253A1 - Basistelekomkabel und zusammengesetztes Kabel für Hochratensignale - Google Patents

Basistelekomkabel und zusammengesetztes Kabel für Hochratensignale Download PDF

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Publication number
EP0895253A1
EP0895253A1 EP98401939A EP98401939A EP0895253A1 EP 0895253 A1 EP0895253 A1 EP 0895253A1 EP 98401939 A EP98401939 A EP 98401939A EP 98401939 A EP98401939 A EP 98401939A EP 0895253 A1 EP0895253 A1 EP 0895253A1
Authority
EP
European Patent Office
Prior art keywords
screen
sheath
cable
internal
telecommunication cable
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Withdrawn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
EP98401939A
Other languages
English (en)
French (fr)
Inventor
Martine Decorps
Jacques Gannat
Jean Gombert
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.)
Sagem SA
Original Assignee
Sagem 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 Sagem SA filed Critical Sagem SA
Publication of EP0895253A1 publication Critical patent/EP0895253A1/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Withdrawn legal-status Critical Current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
    • H01B7/08—Flat or ribbon cables
    • H01B7/0861—Flat or ribbon cables comprising one or more screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1091—Screens specially adapted for reducing interference from external sources with screen grounding means, e.g. drain wires

Definitions

  • the present invention relates to a cable basic telecommunication and a telecommunication cable compound comprising several telecommunication cables basic, for high frequency signals telephone and / or data processing, particularly intended for the transmission of digital data at high speed of the order of 100 to 500 Mbit / s.
  • a local network installed in a building there are two kinds of cables: low cables capacity with four, eight or twelve pairs, called cables horizontal distribution or capillary cables, and high capacity cables with twenty four, thirty two, sixty or one hundred and twenty eight pairs, called distribution cables vertical or bypass cable.
  • Ring roads are usually made from cable elements capillary, each element of capillary cable being in this case considered a telecommunication cable elementary.
  • the bypass cables extend between a general dispatcher and floor distributors or between floor distributors.
  • a basic telecommunication cable comprising two quarter of insulated conductors surrounded by an envelope comprising an internal sheath of insulating material disposed directly in contact with the conductive wires insulated, a metal screen arranged around the sheath internal and a second sheath surrounding the metal screen.
  • the screen serves as shielding to prevent signals carried by the cable are not disturbed by external electromagnetic radiation, as well as to avoid disturbance of the surrounding space by the electromagnetic radiation from the cable, especially for remove crosstalk between capillary cables adjacent.
  • the metal screen is generally made of a metal tape (usually aluminum) attached to a polymer tape and arranged around the sheath internal either by helical winding or according to a laying lengthwise, the edges of the ribbon being arranged to overlap.
  • Each interruption of the shielding provided by the screen is a source parasitic emissions all the more important as the frequency is high.
  • a telecommunications cable is proposed. elementary comprising several isolated wires, an internal sheath of insulating material surrounding the wires insulated conductors, and a conductive screen in the form of ribbon in contact with the internal sheath, in which the screen is fixed to the internal sheath by gluing or welding.
  • the screen has an insulating layer and a conductive layer fixed to each other and the screen is fixed to the sheath internal by the insulating layer. So the conductive layer is on the outside of the cable and allows a connection easy.
  • the cable has a second sheath surrounding the screen and a protective tape between the screen and the second sheathed and having overlapping edges. So, we minimize the risk of making breaks in the screen when cutting the second sheath to access the screen.
  • the protective tape has a conductive layer and an insulating layer attached to the conductive layer, and the conductive layer of the protective tape is in contact with the conductive layer of the screen.
  • the conductive layer of the protective tape is in contact with the conductive layer of the screen.
  • the telecommunication cable illustrated elementary has two twisted star quads 2 comprising each four conductive wires 3 covered with a layer individual insulation 4, for example made of polyethylene or polypropylene.
  • the two quartes 2 are contained in a envelope generally designated in 5 comprising a sheath internal 6.
  • the internal sheath 6 is preferably a sheath in thermoplastic material produced by extrusion around juxtaposed quarters.
  • the internal sheath 6 can also be made in the form of a tightly wound ribbon helically or laid lengthwise with longitudinal edges overlap and can be glued or welded to form an oval or elliptical tube.
  • a tearing line 7 allowing the internal sheath 6 to be torn during a connection of conductive wires for example to contacts self-stripping of a distribution module.
  • the internal sheath 6 is surrounded by a screen 8 comprising in the first mode an insulating layer 9 attached to a layer conductive 10.
  • the screen 8 is for example produced by fixing by gluing a polyester or polyethylene tape and a aluminum or copper tape.
  • the composite tape as well obtained is arranged around the internal sheath 6, by example according to a helical winding as illustrated by Figure 1 preferably with the insulating layer 9 in contact with the internal sheath 6.
  • the screen 8 is not fixed on itself edge on edge but is fixed to the internal sheath 6 by bonding or welding.
  • the paste operation can be made for example by arranging at the outlet of the extruder making the internal sheath 6, or at the entry of a recovery machine, an adhesive application device hot melt which is deposited in a thin layer on the internal sheath then by carrying out a helical wrapping an aluminum and polyester composite tape, the layer of polyester having for example a thickness of about 20 at 50 ⁇ m, while the aluminum layer has a thickness about 10 to 80 ⁇ m.
  • fixing the screen 8 to the internal sheath 6 can also be achieved by welding the screen to the sheath, for example by applying screen 8 while the material forming the internal sheath 6 is still hot or in softening the external surface of the internal sheath 6 immediately upstream of the application device the screen.
  • a second sheath 11 is generally produced around screen 8 to protect it from attacks during handling of the telecommunications cable elementary.
  • the second sheath 11 is for example produced by extrusion.
  • Prior to the realization of the second sheath 11 is preferably put in place a rope tear 12 and a continuity thread 13.
  • the basic telecommunication cable as well obtained can be used either as a capillary cable, preferably with an external sheath 11, either be associated with other basic telecommunication cables for form a bypass cable as shown in Figure 2 on which the basic telecommunication cables 1 do not have an outer sheath 11 and are arranged so that the screens 8 are in contact with each other other.
  • the cable ring road has several telecommunication cables elementary 1 arranged if necessary around an organ central carrier 14.
  • the cable has also one or more stuffing rods 15, for example a polymer rod, intended to give a structure homogeneous with the cable in order to avoid in particular a tangle basic telecommunication cables.
  • the stuffing rod 15 can also contain one or more optical fiber.
  • Telecommunication cables elementary and the stuffing rod are surrounded by a main metal screen 16 itself surrounded by a outer sheath 17.
  • a main metal screen 16 itself surrounded by a outer sheath 17.
  • the cables of elementary telecommunications are in contact by the screens 8 it suffices to provide a single continuity wire 18 in contact with the main screen 16.
  • Figure 3 illustrates a second embodiment an elementary telecommunication cable 1 comprising as before two quartes 2 extending to the interior of an envelope 5 comprising an internal sheath 6 covered with a screen 8.
  • the screen 8 consists of a single metal layer 10 helically wound on the inner sheath 6.
  • a ribbon of protection 19 is this time arranged around the screen 10.
  • the protective tape 19 is an insulating synthetic polymer tape arranged lengthwise and having overlapping edges 20. The protective tape 19 therefore does not adhere to screen 8, it can thus be removed easily when cutting the second sheath 11 for strip the screen 8 and make a connection of the cable elementary transmission.
  • Figure 4 illustrates a third embodiment in which the elementary transmission cable again includes two quartes 2 as before extending in an envelope 5 comprising a sheath internal 6.
  • screen 8 is a composite ribbon wound helically around of the internal sheath 6.
  • screen 8 is covered by a protective tape composite 21 comprising a metal layer 22 in contact with the metal layer 10 of the screen 8 and a layer insulating 23.
  • the protective tape 21 is this time wound in a helix according to a reverse pitch of the winding in screen propeller 8, the edges 24 being arranged to be overlap.
  • the protective tape 21 is covered with a second sheath 11 made of insulating material.
  • the telecommunication cable elementary according to the invention can be achieved with pairs to replace the fourths.
  • screen 8 and protective tape 19, 21 were illustrated according to three different embodiments only, we can vary the layout combinations and structure of each of these elements of the cable basic telecommunications, for example by having 8 long screen associated with a rolled up protective tape in a helix or itself arranged lengthwise, etc. so that the edges of the screen and the edges of the protective tape are offset from each other.
  • the telecommunications cable elementary according to the invention can be achieved by providing means of identification allowing identification easy conductors within a transmission cable elementary or identification of a cable elementary transmission within a compound cable, by example by providing an internal sheath 6 in material transparent and insulating layers 4 of different colors or including nets of different colors, and / or by making a marking on the second sheath 11 or on screen 8 in the form of one or more nets or bands colored extruded, printed or cold stamped or hot.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)
  • Communication Cables (AREA)
EP98401939A 1997-08-01 1998-07-29 Basistelekomkabel und zusammengesetztes Kabel für Hochratensignale Withdrawn EP0895253A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9709883 1997-08-01
FR9709883A FR2766956B1 (fr) 1997-08-01 1997-08-01 Cable de telecommunication elementaire et cable compose pour signaux a haut debit

Publications (1)

Publication Number Publication Date
EP0895253A1 true EP0895253A1 (de) 1999-02-03

Family

ID=9509938

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401939A Withdrawn EP0895253A1 (de) 1997-08-01 1998-07-29 Basistelekomkabel und zusammengesetztes Kabel für Hochratensignale

Country Status (2)

Country Link
EP (1) EP0895253A1 (de)
FR (1) FR2766956B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108986967A (zh) * 2018-08-30 2018-12-11 江苏港通电缆有限公司 一种新型椭圆电缆

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510346A (en) * 1983-09-30 1985-04-09 At&T Bell Laboratories Shielded cable
US4596897A (en) * 1984-03-12 1986-06-24 Neptco Incorporated Electrical shielding tape with interrupted adhesive layer and shielded cable constructed therewith
FR2618939A1 (fr) * 1987-07-31 1989-02-03 Gen Electric Cable assemble pour systeme de transmission de signaux electriques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510346A (en) * 1983-09-30 1985-04-09 At&T Bell Laboratories Shielded cable
US4596897A (en) * 1984-03-12 1986-06-24 Neptco Incorporated Electrical shielding tape with interrupted adhesive layer and shielded cable constructed therewith
FR2618939A1 (fr) * 1987-07-31 1989-02-03 Gen Electric Cable assemble pour systeme de transmission de signaux electriques

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108986967A (zh) * 2018-08-30 2018-12-11 江苏港通电缆有限公司 一种新型椭圆电缆

Also Published As

Publication number Publication date
FR2766956A1 (fr) 1999-02-05
FR2766956B1 (fr) 2002-10-25

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