EP1619694B1 - conducteur électrique isolé continuant à fonctionner en cas d'incendie - Google Patents

conducteur électrique isolé continuant à fonctionner en cas d'incendie Download PDF

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Publication number
EP1619694B1
EP1619694B1 EP04291877A EP04291877A EP1619694B1 EP 1619694 B1 EP1619694 B1 EP 1619694B1 EP 04291877 A EP04291877 A EP 04291877A EP 04291877 A EP04291877 A EP 04291877A EP 1619694 B1 EP1619694 B1 EP 1619694B1
Authority
EP
European Patent Office
Prior art keywords
tape
conductor
layer
plastic
overlap
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.)
Expired - Lifetime
Application number
EP04291877A
Other languages
German (de)
English (en)
Other versions
EP1619694A1 (fr
Inventor
Ferdinand Grögl
Joachim Uttinger
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 PL04291877T priority Critical patent/PL1619694T3/pl
Priority to EP04291877A priority patent/EP1619694B1/fr
Publication of EP1619694A1 publication Critical patent/EP1619694A1/fr
Application granted granted Critical
Publication of EP1619694B1 publication Critical patent/EP1619694B1/fr
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
    • H01B7/17—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/04—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances mica
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • H01B3/08—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances quartz; glass; glass wool; slag wool; vitreous enamels
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0241—Disposition of insulation comprising one or more helical wrapped layers of insulation
    • 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
    • H01B7/02—Disposition of insulation
    • H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation

Definitions

  • the invention relates to an insulated electrical conductor with functional integrity in the event of fire, consisting of a metallic conductor, a glass / mica layer applied to the conductor and a plastic layer surrounding it, in which the glass / mica layer consists of two superposed bands, one first band, the mica layer of which bears against the conductor, and a second band, the width of which is in each case selected such that their edges overlap one another ( DE 100 51 962 A1 ).
  • glass / mica stands for example for a structure of a carrier tape in the form of an open glass fabric with warp and weft threads, which is adhesively coated on one side with mica.
  • a bonding agent between the glass fabric and the mica silicone is used with advantage.
  • insulated conductors are intended for cables or cables that are used to power any consumer and / or for communication in buildings.
  • This requirement means that the cables or cables still retain their function in the event of a fire for a predefinable period of time. A fire burns all flammable materials of the cables or cables. It remains only for a limited period surrounding the conductor glass / mica layer as insulation, which prevents a short circuit with other conductors, a screen or other metal parts.
  • the well-known conductor after the aforementioned DE 100 51 962 A1 is surrounded by a two-band glass / mica layer, both longitudinally incoming are formed with overlapping edges around the conductor. The overlap is at least 50% and the overlap locations are diametrically opposed to each other with respect to the conductor. It is thus easily produced a three-layer glass / mica layer. Such a conductor is sufficient for all functional requirements. However, it can happen in unfavorable cases that the glass / mica layer is mechanically damaged in case of fire at a very high tensile load and associated elongation.
  • the invention has for its object to improve the mechanical stability of the above-described conductor and its electrical safety.
  • the two glass / mica bands provide an overall insulating layer of the conductor which contains sufficient material to effectively insulate the conductor, at least for a prolonged period, even in the event of fire, thereby ensuring its operability for that period.
  • the mechanical strength of the conductor or its insulation against tensile loads is increased by the fact that the second band is wrapped around the first band overlapping.
  • the conductor With the two bands of the glass / mica layer, the conductor has a mechanically stable insulation, which is effective in case of fire at least for the given period of time.
  • This electrical safety is further increased by the plastic layer, through the residual layer of the conductor in case of fire surrounding insulating layer is additionally thickened. This ensures, in any case, a sufficient distance to adjacent conductors, in a two or more conductors having lead, to a screen of such a line or to other metal parts, which meets all electrical requirements, such as dielectric strength, insulation resistance and operating capacity.
  • the plastic layer may be colored differently for different conductors, so that the individual conductors of a multi-conductor line are easy to identify. It may be realized by a plastic tape provided with a heat-sealable layer or by a cross-linked silicone coating.
  • An in Fig. 1 1, designated electrical conductor is preferably made of copper.
  • the conductor 1 may be a strand of individual wires. It can also be designed as a solid wire.
  • a first band 2 made of glass / mica is attached, which is longitudinally formed with overlapping edges around the conductor 1 around.
  • the mica layer of the band 2 faces the conductor 1.
  • the overlap area 3 is in Fig. 1 drawn, limited by a solid line and a dashed line.
  • the overlap is advantageously between 25% and 50%, based on the width of the strip 2.
  • a second strip 4 of glass / mica is wound in an overlapping manner, the mica layer of which faces the first strip 2.
  • the overlap is here also advantageously between 25% and 50%, again based on the width of the belt 4.
  • a plastic tape 6 to be wrapped around overlapping, which is provided on one side with a layer of heat-sealable material.
  • the layer of heat-sealable material is advantageously applied to the second band 4. It then ensures after appropriate heat supply for bonding the overlapping edges of the second band 4.
  • the overlap is advantageously between 25% and 50%, based on its width.
  • the plastic strip 6 may consist of a highly flame-retardant plastic, such as polyamide imide or PEEK.
  • the material of the heat-sealable layer can a copolymer based on ethylene acrylic acid acrylate (EAA) or ethylene methacrylic acid ester (EMA), which melts in a temperature range of about 100 ° C to 200 ° C.
  • EAA ethylene acrylic acid acrylate
  • EMA ethylene methacrylic acid ester
  • the total thickness of such a plastic strip 6 is between 50 microns and 100 microns.
  • the plastic strip 6 can also be a synthetic fiber nonwoven fabric, which can consist of a thermally bonded polyamide-imide nonwoven fabric which is laminated with a heat-sealable plastic copolymer film with a thickness of> 15 ⁇ m.
  • the total thickness of such a plastic strip 6 is between 80 .mu.m and 100 .mu.m.
  • plastic band 6 is a woven or nonwoven ribbon of inorganic material, for example of glass fibers or ceramic fibers, which is laminated with a heat-sealable copolymer film having a thickness of> 15 ⁇ m.
  • the total thickness of such a plastic strip 6 is between 100 microns and 150 microns.
  • the plastic band 6 is preferably wound with the second band 4 opposite winding direction, as in Fig. 1 is shown. But it can also be wound up with the same winding direction as the second band 4.
  • the plastic layer 5 can according to Fig. 2 also be a shell 7 made of cross-linked silicone. It is then applied with a suitable coating device completely on the second band 4.
  • the silicone can be applied in liquid form in a continuous process, for example with a layer thickness between 0.15 mm and 0.8 mm.
  • the silicone can then be crosslinked by means of IR or UV rays.
  • the liquid silicone may be mixed to improve its mechanical properties and fire properties and powder and / or short fibers of glass / quartz or ceramic.
  • the leader after Fig. 1 is made, for example, as follows:
  • a metallic conductor 1 is withdrawn from a supply spool 8 and fed to a forming device 9, in which a first, consisting of glass / mica tape 2 is formed langein secured around the conductor 1. Its mica layer is facing the conductor 1.
  • the tape 2 is to be deducted from a supply spool 10.
  • the width of the band 2 is dimensioned so that an overlap of his Margins of about 25% to 50%, based on its width.
  • the second, glass / mica-containing band 4 is wound around the first band 2 with a winding device 11 so that the first band 2 is held and stabilized in its shape given by the shaping device 9.
  • the mica layer of the second band 4 is preferably applied to the band 2.
  • the provided with a heat-sealable layer plastic tape 6 is then wound up.
  • the heat-sealable layer may face the second band 4. But it can also be outside.
  • the so surrounded by three layers conductor 1 is then pulled through a heating system 13, in which the heat-sealable layer is brought into its sealable state.
  • the overlapping areas of the plastic strip 6 and possibly also the second strip 4 are glued together.
  • the completely insulated conductor can be wound onto a reel 14 or fed to further processing.
  • the sheath 7 is applied from silicone, which is then crosslinked, for example by IR or UV radiation. This conductor can also be wound up or fed to a further processing.
  • wire A The insulated conductor after the Fig. 1 or 2 - hereinafter referred to as "wire A" in short, can be used as a single element in principle.
  • a core A is arranged in a preferred embodiment with at least one further wire A in a line L or a cable.
  • a line L is in cross section, for example in Fig. 4 shown. It has in this embodiment, four stranded together wires A.
  • the wires A are, for example, twisted together to form a star quad.
  • the plastic bands 6 or the sheath 7 of the wires A of a line L can all be colored differently.
  • a glass silk tape or glass / mica tape 15 which is wrapped around the unit with overlapping edges.
  • the Band 15 is surrounded by a one-sided plastic-laminated shielding metal band 16 which is wrapped inwardly around its circumference with metal side or circumferentially around it.
  • the metal strip 16 is, for example, a polyester tape laminated with copper.
  • an existing Beidraht 17 consisting of copper may advantageously be arranged, which is preferably wound with the Verseilschlag the four wires A helically around the band 15.
  • the two-wire 17 ensures the permanent through-connection of the metal strip 16.
  • the band 16 is surrounded by a jacket 18 made of a flame-retardant, halogen-free polymer-based insulating material. It is preferably extruded onto the belt 16.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Insulated Conductors (AREA)

Claims (9)

  1. Conducteur électrique isolé avec maintien de la fonction en cas d'incendie, composé d'un conducteur métallique, d'une couche en verre/mica appliquée sur le conducteur et d'une couche en matière plastique qui entoure celle-ci, la couche en verre/mica étant composée de deux bandes disposées l'une au-dessus de l'autre, une première bande dont la couche en mica repose sur le conducteur et une deuxième bande dont la largeur est à chaque fois choisie de telle sorte que ses bords se chevauchent l'un l'autre, caractérisé en ce
    - que la première bande (2) est façonnée autour du conducteur (1) avec un chevauchement de ses bords compris entre 25 % et 50 % avec rétrécissement dans le sens de la longueur,
    - que la deuxième bande (4) comprenant une couche de mica à l'intérieur est enroulée autour de la première bande (2) avec un chevauchement de ses bords compris entre 25 % et 50 % et
    - que la couche en matière plastique (5) contient un matériau qui forme une couche résiduelle en cas d'incendie, de préférence un matériau qui se transforme en céramique.
  2. Conducteur selon la revendication 1, caractérisé en ce que la deuxième bande (4) est entourée d'une gaine (7) en silicone réticulé.
  3. Conducteur selon la revendication 2, caractérisé en ce que de la poudre et/ou des fibres courtes en verre/quartz ou en céramique sont mélangées avec le silicone.
  4. Conducteur selon la revendication 1, caractérisé en ce qu'une bande en matière plastique (6) munie d'une couche thermosoudable est enroulée autour de la deuxième bande (4).
  5. Conducteur selon la revendication 4, caractérisé en ce que la bande en matière plastique (6) est enroulée autour de la deuxième bande (4) dans un sens d'enroulement opposé à celui de celle-ci.
  6. Conducteur selon la revendication 4, caractérisé en ce que la bande en matière plastique (6) est enroulée autour de la deuxième bande (4) dans le même sens d'enroulement que celle-ci.
  7. Câble comprenant au moins deux conducteurs selon l'une des revendications 1 à 6 toronnés ensemble en une unité, caractérisé en ce que sur l'unité des conducteurs est enroulée avec chevauchement une bande en fibres de verre ou une bande en verre/mica (15), sur laquelle une bande métallique (16) à doublure plastique est enroulée avec chevauchement ou façonnée avec rétrécissement dans le sens de la longueur, laquelle est entourée d'une enveloppe (18) en matériau isolant ignifuge sans composés halogénés.
  8. Câble selon la revendication 7, caractérisé en ce qu'entre la bande métallique (16) et l'enveloppe (18) est disposé un fil témoin (17) métallique qui s'étend dans le sens de la longueur.
  9. Câble selon la revendication 7 ou 8, caractérisé en ce que les couches en matière plastique (5) des deux conducteurs ont des couleurs différentes.
EP04291877A 2004-07-23 2004-07-23 conducteur électrique isolé continuant à fonctionner en cas d'incendie Expired - Lifetime EP1619694B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL04291877T PL1619694T3 (pl) 2004-07-23 2004-07-23 Izolowany przewód elektryczny z utrzymaniem funkcji w przypadku pożaru
EP04291877A EP1619694B1 (fr) 2004-07-23 2004-07-23 conducteur électrique isolé continuant à fonctionner en cas d'incendie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04291877A EP1619694B1 (fr) 2004-07-23 2004-07-23 conducteur électrique isolé continuant à fonctionner en cas d'incendie

Publications (2)

Publication Number Publication Date
EP1619694A1 EP1619694A1 (fr) 2006-01-25
EP1619694B1 true EP1619694B1 (fr) 2012-09-05

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ID=34931279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04291877A Expired - Lifetime EP1619694B1 (fr) 2004-07-23 2004-07-23 conducteur électrique isolé continuant à fonctionner en cas d'incendie

Country Status (2)

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EP (1) EP1619694B1 (fr)
PL (1) PL1619694T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2015382306B2 (en) 2015-02-10 2021-01-28 Prysmian S.P.A. Fire resistant cable
ES2796335T3 (es) 2016-01-26 2020-11-26 Prysmian Spa Sistema de cable resistente al fuego
CN113921190A (zh) * 2020-07-07 2022-01-11 李政 电缆及其制造方法
US20220013251A1 (en) * 2020-07-07 2022-01-13 James Cheng Lee Cable and manufacturing method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2573910B1 (fr) * 1984-11-29 1987-06-19 Habia Cable Revetement isolant souple resistant au feu pour conduites, fils et cables electriques
KR100363600B1 (ko) * 1994-07-14 2003-02-19 레이켐 리미티드 내화성전선
DE10051962A1 (de) * 2000-10-20 2002-05-02 Alcatel Sa Isolierter elektrischer Leiter mit Funktionserhalt im Brandfall

Also Published As

Publication number Publication date
PL1619694T3 (pl) 2013-02-28
EP1619694A1 (fr) 2006-01-25

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