EP0441748A1 - Unter einem Bodenbelag verlegtes elektrisches Niederspannungsflachkabel - Google Patents

Unter einem Bodenbelag verlegtes elektrisches Niederspannungsflachkabel Download PDF

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Publication number
EP0441748A1
EP0441748A1 EP91810069A EP91810069A EP0441748A1 EP 0441748 A1 EP0441748 A1 EP 0441748A1 EP 91810069 A EP91810069 A EP 91810069A EP 91810069 A EP91810069 A EP 91810069A EP 0441748 A1 EP0441748 A1 EP 0441748A1
Authority
EP
European Patent Office
Prior art keywords
sheet
conductors
conductor
cable according
screen
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Withdrawn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
EP91810069A
Other languages
English (en)
French (fr)
Inventor
Daniel Bussy
Roger Trolliet
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.)
CETISA
CABLES CORTAILLOD SA
Original Assignee
CETISA
CABLES CORTAILLOD 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 CETISA, CABLES CORTAILLOD SA filed Critical CETISA
Publication of EP0441748A1 publication Critical patent/EP0441748A1/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Withdrawn legal-status Critical Current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
    • H01B7/0869—Flat or ribbon cables comprising one or more armouring, tensile- or compression-resistant elements
    • 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

Definitions

  • the present invention relates to a flat electric cable for low voltage laid under a floor covering, in particular a carpet or carpet, comprising at least three flat conductors, one of which is the ground conductor, arranged parallel to one another and coated in two sheets of insulating material to form a sheet of insulated conductors, a non-insulated conductive screen placed on the sheet of insulated conductors and electrically connected by zones spaced from each other to the earth conductor, an upper layer of non-magnetic metal with high mechanical resistance arranged by above said screen, and a lower layer of synthetic material placed under the sheet of insulated conductors
  • under-carpet cables which are currently used to replace the sheathed cables laid or pulled according to traditional distribution methods. These cables are particularly advantageous in commercial buildings, as well as in cases of interior renovation. These extra-flat cables are installed under the carpet squares, and this cabling method is a reliable, economical and flexible solution to replace conventional cabling systems. These cables allow horizontal distribution of low-voltage current by means of a network placed on the floor, under the carpet.
  • the present invention proposes to overcome these drawbacks by producing a flat cable of the type mentioned above, which has a maximum of guarantees against all the risks of damage to the surface of insulating material between which the conductors are located.
  • the cable according to the invention is characterized in that the upper layer has a width at most equal to that of the lower layer and in that said upper layer is fixed along its edges to said lower layer, so as to form a sealed enclosure in which are disposed said sheet of insulated conductors and said screen.
  • the upper layer is bonded along its edges to said lower layer.
  • the lower layer can be adhesive and fixed to the ground by gluing.
  • the sheet of insulated conductors includes indelible identification marks of the conductors. These identification marks can be lines of different colors.
  • the ground conductor and the screen are bonded by welding through the sheet of upper insulating material of the sheet of insulated conductors.
  • the cable according to the invention may comprise a phase conductor, a neutral conductor and an earth conductor, the earth conductor being lateral and the neutral conductor being central.
  • it can comprise three phase conductors arranged side by side, a neutral conductor and an earth conductor, the latter being lateral and the neutral conductor being disposed between the phase conductors and the earth conductor.
  • the upper non-magnetic metal layer is directly supported against said conductive screen.
  • the flat cable shown 10 comprises three conductors 11, 12 and 13 respectively which are in the form of conductive tapes, for example made of copper, and which are wrapped in a thin strip of insulating material to form a ply 14 of insulated conductors.
  • the three conductors 11, 12 and 13 are arranged in parallel and are electrically isolated from each other.
  • Each conductor is associated with an identification mark which in this case is in the form of a colored line, for example a black line 15 for the phase conductor 11, a gray or blue line 16 for the neutral conductor 12 and a green and yellow double line 17 for the earth conductor 13. It will be noted that the earth conductor is arranged laterally with respect to the other two conductors.
  • the insulating thin strip which surrounds the conductors is arranged under a metal screen 18 which is electrically connected and mechanically connected, by spaced zones forming contact pads, to the earth conductor 13.
  • This connection can be made by welding through openings 19 formed in the upper part of the sheet of insulating material covering the earth conductor. It can also be carried out through the insulation, for example by ultrasonic welding.
  • a lower layer 20 made of an insulating material is arranged under the sheet 14.
  • This lower layer is dimensioned so that it projects on both sides relative to the sheet 14. It is preferably fixed to the floor by gluing, for example thanks to an adhesive layer provided on its lower surface.
  • the role of this lower layer is to provide mechanical protection for the thin strip of insulating material and to avoid damage to this insulator which may be caused by roughness of the ground.
  • An upper layer 21 is arranged on the screen 18.
  • This upper layer is preferably in the form of a strip having very high mechanical strength and made of a non-magnetic material.
  • this upper layer is made of stainless steel.
  • the role of this upper layer is to provide mechanical protection of the conductor ply and the screen against the risk of damage, to ensure the drainage of the electrostatic charges of the carpet or carpet since it is in direct contact with the screen itself electrically connected to the earth conductor, to play the role of regulator and thermal diffuser of the cable, to avoid losses by hysteresis generated by the magnetic field resulting from the current circulating in the cable conductors, and to protect the cable against the penetration of dust, if the edges of the upper layer are glued to the edge of the lower layer .
  • FIG. 2 represents a view similar to that of FIG. 1, but in which the conductor 11 has been replaced by three conductors 11a, 11b and 11c respectively. These three conductors are associated with colored marking lines, respectively 15a, 15b and 15c.
  • This 10 ′ cable is essentially intended for use to convey three-phase current.
  • the sheet of insulated conductors is covered with a screen 18.
  • a lower layer of synthetic material 20, preferably adhesive, is fixed to the ground under the strip of insulating material and the assembly is covered by a protective strip, for example in stainless steel or another material with high mechanical resistance, provided that it is non-ferrous and cannot be corroded by external agents such as ambient humidity.
  • the sheet of insulated conductors 14 is produced by means of two multilayer sheets 30 and 31 of synthetic material respectively arranged above and below the flat conductors 11a, 11b, 11c, 12 and 13.
  • the double-layer composition is only shown in FIG. 5.
  • the sheet 31 is for example made of PVC and has a thickness of 100 ⁇ m while the sheet 30 is for example made of polyester and has a thickness of 50 ⁇ m.
  • the two sheets 30 and 31 are glued or welded together, by means of a press which has a profile suitable for producing grooves 32a, 32b, 33a, 33b, 34a, 34b, 35a and 35b which are two by two symmetrical and form longitudinal throttles parallel to the flat conductors. These throttles separate the conductors from each other and avoid any risk of short circuit.
  • the sheets 30 and 31 are made up of multilayer strips.
  • each of them comprises an outer layer 40 of polyester which is printed on its inner face 41, and an inner layer 42 of polyvinyl chloride (PVC).
  • PVC polyvinyl chloride
  • the two layers of PVC are thermally welded together to produce the ply 14. The impression is indelible since it is sandwiched between the two layers 40 and 42 and it appears in transparency through the outer layer 40.
  • Figure 6 shows the flat cable of Figure 1 seen in cross section. It can be seen that the sheet of insulated conductors is arranged inside a sealed enclosure which is obtained by bonding the lower layer 20 and the upper layer 21, along their longitudinal edges.

Landscapes

  • Insulated Conductors (AREA)
EP91810069A 1990-02-05 1991-01-30 Unter einem Bodenbelag verlegtes elektrisches Niederspannungsflachkabel Withdrawn EP0441748A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001436 1990-02-05
FR9001436A FR2657993B1 (fr) 1990-02-05 1990-02-05 Cable electrique plat pour basse tension pose sous un revetement de sol.

Publications (1)

Publication Number Publication Date
EP0441748A1 true EP0441748A1 (de) 1991-08-14

Family

ID=9393481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810069A Withdrawn EP0441748A1 (de) 1990-02-05 1991-01-30 Unter einem Bodenbelag verlegtes elektrisches Niederspannungsflachkabel

Country Status (2)

Country Link
EP (1) EP0441748A1 (de)
FR (1) FR2657993B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12249440B2 (en) 2009-12-09 2025-03-11 Holland Electronics, Llc Guarded coaxial cable assembly
US10573433B2 (en) * 2009-12-09 2020-02-25 Holland Electronics, Llc Guarded coaxial cable assembly
FR3065834B1 (fr) * 2017-04-27 2019-07-05 Commissariat A L'energie Atomique Et Aux Energies Alternatives Cable electrique pour cablage de parafoudre

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457547A1 (fr) * 1979-05-25 1980-12-19 Thomas & Betts Corp Structure de cable electrique plat et procede de pose de cette structure
FR2476896A1 (fr) * 1980-02-21 1981-08-28 Thomas & Betts Corp Structure de cable electrique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457547A1 (fr) * 1979-05-25 1980-12-19 Thomas & Betts Corp Structure de cable electrique plat et procede de pose de cette structure
FR2476896A1 (fr) * 1980-02-21 1981-08-28 Thomas & Betts Corp Structure de cable electrique

Also Published As

Publication number Publication date
FR2657993B1 (fr) 1995-01-20
FR2657993A1 (fr) 1991-08-09

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19920109

17Q First examination report despatched

Effective date: 19930406

18D Application deemed to be withdrawn

Effective date: 19931019