EP0260373B1 - Conducteur électrique résistant à la flamme - Google Patents

Conducteur électrique résistant à la flamme Download PDF

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Publication number
EP0260373B1
EP0260373B1 EP87104172A EP87104172A EP0260373B1 EP 0260373 B1 EP0260373 B1 EP 0260373B1 EP 87104172 A EP87104172 A EP 87104172A EP 87104172 A EP87104172 A EP 87104172A EP 0260373 B1 EP0260373 B1 EP 0260373B1
Authority
EP
European Patent Office
Prior art keywords
insulation
band
electrical line
line according
screening
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
EP87104172A
Other languages
German (de)
English (en)
Other versions
EP0260373A2 (fr
EP0260373A3 (en
Inventor
Siegfried Richter
Helmar Hetz
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.)
Kabelmetal Electro GmbH
Original Assignee
Kabelmetal Electro GmbH
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 Kabelmetal Electro GmbH filed Critical Kabelmetal Electro GmbH
Priority to AT87104172T priority Critical patent/ATE70383T1/de
Publication of EP0260373A2 publication Critical patent/EP0260373A2/fr
Publication of EP0260373A3 publication Critical patent/EP0260373A3/de
Application granted granted Critical
Publication of EP0260373B1 publication Critical patent/EP0260373B1/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

Definitions

  • the invention relates to a flame-resistant electrical line, consisting of at least one electrical conductor, a surrounding insulation and a band of glass fabric wrapped with overlapping edges around the insulated conductor, which is provided on one side with a metal layer (DE-PS 30 44 871) .
  • Lines in the sense of the invention are to be those lines with which telecommunications signals can be transmitted with little loss and without interference. In principle, these are high-frequency (HF) lines and low-frequency (NF) lines.
  • HF lines are used, for example, in radio relay and antenna systems as well as in FM, radio and television reception systems.
  • LF lines are required, for example, for electroacoustics and sound frequency measurement technology. With just one conductor, they are used, for example, as connecting leads for crystal microphones, magnetic sound heads and dictation machines.
  • the lines and for the materials used only their electrical properties are taken into account in order to achieve the best transmission properties.
  • the lines themselves do not burn in the event of a fire and that they can function at least for a certain period of time even at very high temperatures.
  • the word "flame-resistant” should be understood to mean the special properties of an electrical line in the event of a fire, which also include low smoke, non-flammability and freedom from halogen.
  • DE-OS 28 00 688 describes an electrical cable with conductors whose insulation consists of a mica tape and an overlying layer of rubber.
  • the insulated conductors (wires) of this cable are wrapped with an aluminum-plastic laminate.
  • a polyester tape is wrapped around the cable core, over which a layer of a thermoplastic elastomer filled with aluminum hydroxide is attached.
  • a glass fiber mat is wrapped over it, with a braided metal armor over it.
  • a layer of chlorosulfonated polyethylene is attached as an outer protective jacket.
  • the effort to manufacture such a cable is considerable. This applies both to the conductors, the insulation of which comprises a mica tape, and to the entire cable, whose sheath surrounding the cable core consists of five different layers, which cannot be applied in one operation. Such a cable can therefore hardly be used economically.
  • the line according to the aforementioned DE-PS 30 44 871 is much simpler. Above the core formed by several insulated conductors, only a polyester tape coated with aluminum and an outer protective jacket made of plastic are attached. A highly filled polyvinyl chloride mixture is used to insulate the conductors. It should be achieved that the insulation even at very high temperatures of over 1000 ° C. remains stable so that short circuits are avoided. Because of the special insulating material, this known cable cannot be used for purposes with high demands on the transmission properties. In addition, if fire does get to the polyvinyl chloride for any reason, the polyvinyl chloride will start burning, releasing highly toxic and dangerous chlorine gas.
  • the invention is based on the object of specifying a flame-resistant line which, while maintaining a simple structure, meets high requirements for its transmission properties and is non-combustible even at temperatures of over 1000.degree.
  • a halogen-free polymeric plastic such as polyethylene, is used for the insulation of the conductor, which guarantees the favorable transmission properties of the line.
  • This material is accepted for the good transfer properties, even though it is combustible per se.
  • the tape is wound onto the insulation or shielding so that the metal layer is on the outside. It therefore acts like a closed metallic tube for a flame.
  • the overlap is so small that this "tube” has enough gaps so that the gases that are generated when it is very hot can escape. This prevents the wrapping given by the tape from bursting.
  • the shielding required for the purpose of the line is also surrounded by the band and therefore also protected by it.
  • the sheath applied as the outer layer serves as mechanical protection for the entire line and in particular for the strip.
  • Fig. 1 is a side view of a line according to the invention with layers removed in portions.
  • Fig. 2 shows a section through Fig. 1 along the line II - II in an enlarged view.
  • Fig. 3 is a side view of a modified compared to Fig. 1 line.
  • Fig. 4 shows a section through Fig. 3 along the line IV - IV in an enlarged view.
  • Fig. 1 an RF line with a conductor 1, insulation 2 and a shield 3 is shown.
  • the conductor 1 can be designed as a stranded conductor with a multiplicity of individual wires combined or as a solid conductor. It is preferably made of copper.
  • the shield 3 lying above the insulation 2 - also referred to as "outer conductor" in the case of HF lines - can consist of braided or stranded individual wires (FIG. 1). According to FIG. 3, it can also consist of a metal strip which is wrapped or longitudinally folded around the insulation 2.
  • the shield 3 is preferably made of copper.
  • a halogen-free polymer plastic is used as the material for the insulation 2.
  • the insulation 2 consists of polyethylene. This material has excellent electrical properties. It is therefore ideally suited for HF lines.
  • the insulation 2 can in principle also be made of another polymeric plastic, such as polypropylene. These materials are all highly flammable. For many applications, the HF line must therefore be constructed so that the insulation 2 cannot burn.
  • a tape 4 is wound over the shield 3, which consists of a glass fabric provided on one side with a metal layer.
  • the metal layer covers the band 4 over its entire length and width. It can consist of aluminum or copper, for example.
  • the metal layer is on the outside of the pipe.
  • a jacket 5 made of insulating material for protecting the tape 4 is attached above the tape 4. It can consist, for example, of a flame-retardant copolymer of polyethylene.
  • a semiconducting layer 6 can also be applied over the insulation 2, over which the shield 3 lies. Layer 6 serves to avoid microphony.
  • the line according to the invention with the structure shown in the exemplary embodiments is flame-resistant. It does not burn even in high heat and an open flame. In the area of an open flame, only the jacket 5 melts, so that the tape 4 or the metal layer thereof is exposed.
  • the band 4 represents a barrier to open flames. It has a flame-retardant effect, so that the enclosed line and in particular the combustible insulation 2 are effectively protected. This also applies to temperatures of more than 1000 ° C.
  • the overlap of the individual turns of the band 4 must therefore not be too large. But it must also not be too small so that the closed position formed by the band 4 does not open when the line is bent.
  • the width "B" of the overlap should therefore be between 7% and 35% of the width of the band 4. In a preferred embodiment, the width of the overlap is 20%.

Landscapes

  • Insulated Conductors (AREA)
  • Organic Insulating Materials (AREA)

Claims (8)

1. Câble électrique résistant à la flamme comportant au moins un conducteur électrique, une isolation entourant ledit conducteur et une bande en tissu de verre entourée autour du conducteur isolé avec ses côtés se recouvrant, ladite bande étant munie d'un côté d'une couche métallique caractérisé, en ce que l'isolation (2) du conducteur (1) est constituée d'un polymère de plastique sans halogène, en ce que sur l'isolation (2) est disposé un écran métallique (3), en ce que la bande (4) avec la couche métallique vers l'extérieur est enroulée autour de l'écran (3), en ce que la largeur (B) du recouvrement fait de 7 à 35 % de la largeur de la bande (4) et en ce qu'une gaine (5) de matériau isolant est disposée sur la bande (4).
2. Câble selon la revendication 1 caractérisé, en ce que la largeur (B) fait 20 % de la largeur de la bande (4).
3. Câble selon l'une des revendications 1 ou 2 caractérisé, en ce qu'une couche (6) de matériau semi conducteur est disposée entre l'isolation (2) et l'écran (3).
4. Câble selon l'une des revendications 1 à 3 caractérisé, en ce que l'écran (3) est réalisé en treillis ou en cordage.
5. Câble selon l'une des renvendications 1 à 3 caractérisé, en que l'écran (3) est constitué d'une bande en métal enroulée ou pliée dans le sens de la longueur.
6. Câble selon l'une des revendications 1 à 5 caractérisé, en ce que l'isolation (2) est constituée de polyéthylène.
7. Câble selon l'une des revendivations 1 à 6 caractérisé, en ce que la gaine (5) est constituée d'un copolymère résistant à la flamme.
8. Utilisation d'un câble selon les revendications 1 à 7, comme câble haute fréquence.
EP87104172A 1986-09-18 1987-03-20 Conducteur électrique résistant à la flamme Expired - Lifetime EP0260373B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87104172T ATE70383T1 (de) 1986-09-18 1987-03-20 Flammbestaendige elektrische leitung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3631699 1986-09-18
DE3631699A DE3631699C2 (de) 1986-09-18 1986-09-18 Flammbeständige elektrische Leitung

Publications (3)

Publication Number Publication Date
EP0260373A2 EP0260373A2 (fr) 1988-03-23
EP0260373A3 EP0260373A3 (en) 1988-09-28
EP0260373B1 true EP0260373B1 (fr) 1991-12-11

Family

ID=6309807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87104172A Expired - Lifetime EP0260373B1 (fr) 1986-09-18 1987-03-20 Conducteur électrique résistant à la flamme

Country Status (6)

Country Link
US (1) US4810835A (fr)
EP (1) EP0260373B1 (fr)
AT (1) ATE70383T1 (fr)
DE (1) DE3631699C2 (fr)
GB (1) GB2195817B (fr)
SG (1) SG61591G (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9115888D0 (en) * 1991-07-23 1991-09-04 Bicc Plc Electric & communications cables
US5422614A (en) * 1993-02-26 1995-06-06 Andrew Corporation Radiating coaxial cable for plenum applications
FR2704351B1 (fr) * 1993-04-22 1995-05-24 Alcatel Cable Câble éléctrique coaxial souple de tenue au feu améliorée.
WO1996002920A1 (fr) * 1994-07-14 1996-02-01 Raychem Limited Fils ignifuges
GB2294801B (en) * 1994-11-07 1999-04-21 Bka Improvements in and relating to electrical cables
US5898133A (en) * 1996-02-27 1999-04-27 Lucent Technologies Inc. Coaxial cable for plenum applications
US6204445B1 (en) 1997-02-06 2001-03-20 Commscope Properties, Llc Aerially installed communications cable
GB9707300D0 (en) 1997-04-10 1997-05-28 Plastic Insulated Cables Ltd Communications cable
DE29909835U1 (de) * 1999-06-05 1999-08-12 Alcatel, Paris Elektrisches oder optisches Kabel mit Funktionserhalt im Brandfall
GB9930509D0 (en) * 1999-12-24 2000-02-16 Plastic Insulated Cables Ltd Communications cable
ES2238043T3 (es) 2000-02-21 2005-08-16 Pirelli Energie Cables Et Systemes France Cable de baja tension no halogeno ignifugo y estanco al agua.
DE10051962A1 (de) * 2000-10-20 2002-05-02 Alcatel Sa Isolierter elektrischer Leiter mit Funktionserhalt im Brandfall
AU2002241884A1 (en) * 2001-01-16 2002-07-30 Parker Hannifin Corporation Flame retardant tubing for a bundle
US6472601B2 (en) * 2001-01-30 2002-10-29 Lockheed Martin Corporation Electrically-conductive, thermally-insulating structure and method
DE102004025853A1 (de) * 2004-05-24 2006-01-19 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Druckmittelführender Bremsschlauch eines Schienenfahrzeugs
GB2448778B (en) * 2007-05-18 2010-04-14 Draka Uk Ltd Fire-resistant cable
CN104992775A (zh) * 2015-06-19 2015-10-21 张家港金海港电线电缆有限公司 一种耐用电线

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3617377A (en) * 1966-06-10 1971-11-02 Fujikura Ltd Insulation consisting of ethylene-propylene rubber composition for electric wire and cable
US3576940A (en) * 1968-12-03 1971-05-04 Cerro Corp Flame-retardant wire and cable
US3643007A (en) * 1969-04-02 1972-02-15 Superior Continental Corp Coaxial cable
US3790697A (en) * 1972-10-30 1974-02-05 Okonite Co Power cable shielding
JPS5378087A (en) * 1976-12-17 1978-07-11 Furukawa Electric Co Ltd:The Flame-retardant cable for transmission line
NO141732C (no) * 1977-01-12 1984-09-04 Norsk Kabelfabrik As Flammebestandig kabelkonstruksjon
GB1597125A (en) * 1977-08-24 1981-09-03 Bicc Ltd Radiating cables
GB2076419B (en) * 1980-05-21 1984-01-25 Furukawa Electric Co Ltd Cross-linked polyethylene insulated power cable
DE3044871C2 (de) * 1980-11-28 1986-06-05 kabelmetal electro GmbH, 3000 Hannover Flammbeständiges elektrisches Kabel
JPS58154514U (ja) * 1982-04-12 1983-10-15 古河電気工業株式会社 ゴム、プラスチツク絶縁電力ケ−ブル
GB2128394B (en) * 1982-10-01 1987-02-11 Raychem Ltd Flame retarded cladding
US4549041A (en) * 1983-11-07 1985-10-22 Fujikura Ltd. Flame-retardant cross-linked composition and flame-retardant cable using same
DE3544810A1 (de) * 1985-12-18 1987-06-19 Eilentropp Hew Kabel Schutzhuelle gegen hitze- und feuereinwirkung von aussen fuer strangfoermiges gut

Also Published As

Publication number Publication date
GB2195817B (en) 1990-05-30
SG61591G (en) 1991-08-23
GB8721922D0 (en) 1987-10-21
US4810835A (en) 1989-03-07
ATE70383T1 (de) 1991-12-15
EP0260373A2 (fr) 1988-03-23
EP0260373A3 (en) 1988-09-28
GB2195817A (en) 1988-04-13
DE3631699C2 (de) 1993-11-11
DE3631699A1 (de) 1988-03-24

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