EP0290343A1 - Assembly of a sheath and a screw connector - Google Patents

Assembly of a sheath and a screw connector Download PDF

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Publication number
EP0290343A1
EP0290343A1 EP88401091A EP88401091A EP0290343A1 EP 0290343 A1 EP0290343 A1 EP 0290343A1 EP 88401091 A EP88401091 A EP 88401091A EP 88401091 A EP88401091 A EP 88401091A EP 0290343 A1 EP0290343 A1 EP 0290343A1
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EP
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Prior art keywords
sheath according
shielding
screen
braids
mumetal
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EP88401091A
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German (de)
French (fr)
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EP0290343B1 (en
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Christian Lesage
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    • 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

Definitions

  • the present invention relates to a cable shielding sheath for protection against electromagnetic radiation, in particular in the range of myriametric and kilometer waves.
  • a particular problem to be solved is that of hardening to electromagnetic interference (EMI) of very low frequency (VLF) and low frequency (LF) reception or emission installations as well as acoustic detection installations, or any other system operating in these frequency ranges.
  • EMI electromagnetic interference
  • hardening that is to say insensitivity, to electromagnetic interference operating at low and very low frequencies, consists in shielding the cables with metal steel tubes in the straight part of their path. In the bent parts of the wiring, a flexible austenitic stainless steel pipe is used.
  • the flexible austenic stainless steel tube is of little interest by the very fact that the magnetic permeability of these stainless steels is close to 1.
  • Patent FR 2 532 463 is also known, which describes a cable protection sheath against electromagnetic disturbances and corrosion, having a characteristic combination of ferromagnetic layers with low magnetizing power, such as mild steel, and with high magnetizing power, such as silicon steel, inserted in a conductive filler material itself comprised between two layers of conductive plastic. This sheath is not suitable for low frequency electromagnetic radiation.
  • the shielding efficiency in the frequencies from 10 to 100 kHz is significantly improved when using a screen with a high coefficient of magnetic permeability.
  • the H component of the electromagnetic wave is more active at low frequencies than at high frequencies.
  • Optimal shielding efficiency is obtained if the electric field and the magnetic field of the wave are attenuated on the one hand.
  • Patent FR 2 461 342 describes, however, a cable with high immunity against electromagnetic radiation.
  • the cable is coated with a flexible covering which mainly comprises a composite magnetic material comprised between two flexible conductive shields.
  • this coating is mechanically linked to the conductor cable and does not have the possibility of radial elasticity for its adaptation to cables of even slightly different dimensions.
  • the present invention overcomes the drawbacks mentioned above by proposing a sheath having a certain flexibility, both axial and radial, allowing its adaptation to various types and configurations of cables, which offers effective protection of these cables against electromagnetic radiation in the range of myriametric and kilometer waves, and which can be fitted with standard fittings.
  • the subject of the invention is therefore a flexible concentric multilayer sheath for shielding electric cable, in particular for protection against electromagnetic radiation at low frequencies, characterized in that it comprises, between two insulating layers, a screen with a high coefficient of magnetic permeability consisting of at least one strip of iron-nickel alloy with crystal structure, for example mumetal, or of iron-nickel-boron alloy with amorphous structure placed between two metal braids with low electrical resistivity and high recovery rate .
  • the screen is made up of two superimposed bands of metal wound in contiguous turns, placed between two tinned copper braids.
  • the shielding sheath according to the invention makes it possible to harden an installation in a homogeneous manner. It has a certain flexibility which allows the same product to be used over the entire length of the wiring (straight or curved part), and can be fitted with fittings provided with a flexible contact at the junction of the crimping body and the part threaded connection which facilitate the implementation of the product.
  • fittings adapted to each type of plug or cable gland can reinforce the overall efficiency of hardening, by improving electromagnetic immunity by limiting the risks of electromagnetic leakage.
  • the shielding sheath is composed of concentric layers from the inside to the outside, defined as follows, around an electric cable 20.
  • the first layer 1 is a 2 mm diameter stainless steel wire wound in a helix with a pitch of 10 mm.
  • the purpose of this wire is to ensure mechanical resistance of the product to radial forces.
  • the second layer 2 is an insulating film which has the function of avoiding direct contact with the stainless steel wire and the elastomer and which may be necessary in the production.
  • a third layer 3 of elastomer which is a self-extinguishing silicone gum and exhibiting no release of halogen or toxic gas.
  • the fourth layer 4 is a very thin insulating film which separates the upper layer of copper from the elastomer. This film facilitates the stripping of the sheath.
  • the screen with a high coefficient of permeability follows a fifth layer 5 which is a tinned copper braid with a high recovery rate.
  • strip 7 of mumetal identical to the strip 6 is to ensure recovery of the contiguous part of the preceding strip.
  • the metal can be replaced by an iron-nickel-boron alloy with an amorphous structure, possibly containing phosphorus like that known under the trade name "MET GLAS", which then retains a high magnetic permeability even after possible mechanical deformation.
  • MET GLAS iron-nickel-boron alloy with an amorphous structure, possibly containing phosphorus like that known under the trade name "MET GLAS", which then retains a high magnetic permeability even after possible mechanical deformation.
  • the screen is covered with a braid 8 of tinned copper with a high recovery rate, itself covered with a layer 9 identical to layer 2, and with a layer 10 of elastomer identical to layer 3.
  • a coating 11 must resist mechanical and chemical attack, in particular from the military environment.
  • FIG. 2 shows a specific fitting 21 adapted to the sheath according to the invention, comprising a crimping zone 22 separated from a threaded ring 23, by a flexible contact 24 made for example of phosphorous bronze or copper, to ensure galvanic continuity between the crimping zone 22 and the ring 23.
  • a rod 25 of steel ensures the mechanical retention of the parts 22 and 23.
  • the threaded ring allows mechanical connection to a cable gland 26.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Insulated Conductors (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The present invention relates to a concentric multi-layer flexible screening sheath for an electrical cable (20), especially for protection against low-frequency electromagnetic radiation. It comprises, between two insulating layers (2-4, 9-10), a screen (5-8) having a high magnetic permeability coefficient formed by at least one band of nickel-iron alloy having a crystalline structure such as mu-metal (6), or from a boron-nickel-iron alloy having an amorphous structure, which band is placed between two metallic braids (5, 8) having low electrical resistivity and high coverage, for example made of tinned copper. Application to protecting against electromagnetic radiation in the myriametric and kilometric wave range. <IMAGE>

Description

La présente invention concerne une gaine de blindage de câble pour la protection contre le rayonnement électro­magnétique, notamment dans la gamme des ondes myriamétriques et kilomètriques.The present invention relates to a cable shielding sheath for protection against electromagnetic radiation, in particular in the range of myriametric and kilometer waves.

Un problème particulier à résoudre est celui du dur­cissement aux interférences électromagnétiques (EMI) des ins­tallations très basses fréquences (VLF) et basses fréquences (LF) de réception ou d'émission ainsi que des installations de détections acoustiques, ou de tout autre système fonctionnant dans ces gammes de fréquences.A particular problem to be solved is that of hardening to electromagnetic interference (EMI) of very low frequency (VLF) and low frequency (LF) reception or emission installations as well as acoustic detection installations, or any other system operating in these frequency ranges.

On cherche aussi à atténuer le rayonnement des câbles véhiculant de l'énergie qui sont souvent des sources de para­site V L F et L F (par exemple l'harmonique de rang 170 du 60 Hertz peut perturber la réception oméga à 10,2 Khz).We also seek to attenuate the radiation of cables carrying energy which are often sources of parasite V L F and L F (for example the harmonic of rank 170 of 60 Hertz can disturb the omega reception at 10.2 Khz).

Dans une réalisation antérieure, le durcissement, c'est à dire l'insensibilité, aux interférences électromagnéti­ques fonctionnant à basses et très basses fréquences, consiste à blinder les câbles avec des tubes métalliques en acier dans la partie rectiligne de leur cheminement. Dans les parties coudées du câblage, on utilise un tuyau flexible en acier inoxydable austénitique.In a previous embodiment, hardening, that is to say insensitivity, to electromagnetic interference operating at low and very low frequencies, consists in shielding the cables with metal steel tubes in the straight part of their path. In the bent parts of the wiring, a flexible austenitic stainless steel pipe is used.

La multiplicité d'organes de liaison spécifiques, en­tre ces divers produits, implique une réalisation à l'unité de pièces d'adaptation plus ou moins complexes.The multiplicity of specific connecting members, between these various products, implies the production of more or less complex adaptation pieces individually.

Si le tube acier de forte épaisseur est un blindage ef­ficace à ces fréquences, le tuyau flexible en acier inoxyda­ble austénique ne présente que peu d'intérêt par le fait même que la perméabilité magnétique de ces aciers inoxydables est proche de 1.If the very thick steel tube is an effective shielding at these frequencies, the flexible austenic stainless steel tube is of little interest by the very fact that the magnetic permeability of these stainless steels is close to 1.

On connaît aussi le brevet FR 2 532 463 qui décrit une gaine de protection de câble contre les perturbations électro­magnétiques et la corrosion, présentant une combinaison carac­téristique de couches ferromagnétiques à bas pouvoir magnéti­sant, comme de l'acier doux, et à haut pouvoir magnétisant, comme de l'acier au silicium, insérées dans un matériau con­ducteur de remplissage compris lui-même entre deux couches de plastique conducteur. Cette gaine n'est pas adaptée aux rayon­nements électro-magnétiques basses fréquences.Patent FR 2 532 463 is also known, which describes a cable protection sheath against electromagnetic disturbances and corrosion, having a characteristic combination of ferromagnetic layers with low magnetizing power, such as mild steel, and with high magnetizing power, such as silicon steel, inserted in a conductive filler material itself comprised between two layers of conductive plastic. This sheath is not suitable for low frequency electromagnetic radiation.

On sait que l'efficacité de blindage dans les fréquen­ces de 10 à 100 Khz se trouve singulièrement améliorée lorsque l'on utilise un écran à fort coefficient de perméabilité magnétique. La composante H de l'onde électromagnétique est plus active en basse fréquence qu'aux fréquences élevées.It is known that the shielding efficiency in the frequencies from 10 to 100 kHz is significantly improved when using a screen with a high coefficient of magnetic permeability. The H component of the electromagnetic wave is more active at low frequencies than at high frequencies.

L'efficacité de blindage optimum est obtenue si l'on atténue, d'une part, le champ électrique et, d'autre part, le champ magnétique de l'onde.Optimal shielding efficiency is obtained if the electric field and the magnetic field of the wave are attenuated on the one hand.

Si l'on maitrise la technologie du blindage du champ électrique, celle du champ magnétique n'a pas suivi l'évolution issue des matières premières.If one masters the shielding technology of the electric field, that of the magnetic field has not followed the evolution from raw materials.

Le brevet FR 2 461 342 décrit toutefois un câble à haute immunité contre les rayonnements électro-magnétiques. Le câble est enrobé par un revêtement flexible qui comprend prin­cipalement un matériau magnétique composite compris entre deux blindages conducteurs flexibles. Mais ce revêtement est lié mécaniquement au câble conducteur et ne présente pas de possi­bilité d'élasticité radiale pour son adaptation à des câbles de dimensions même légérement différentes.Patent FR 2 461 342 describes, however, a cable with high immunity against electromagnetic radiation. The cable is coated with a flexible covering which mainly comprises a composite magnetic material comprised between two flexible conductive shields. However, this coating is mechanically linked to the conductor cable and does not have the possibility of radial elasticity for its adaptation to cables of even slightly different dimensions.

La présente invention pallie les inconvénients men­tionnés ci-dessus en proposant une gaine présentant une cer­taine souplesse, tant axiale que radiale, permettant son adaptation à divers types et configurations de câbles, qui of­fre une protection efficace de ces câbles contre le rayonne­ment électro-magnétique dans la gamme des ondes myriamétriques et kilomètriques, et qui peut être équipée de raccords standards.The present invention overcomes the drawbacks mentioned above by proposing a sheath having a certain flexibility, both axial and radial, allowing its adaptation to various types and configurations of cables, which offers effective protection of these cables against electromagnetic radiation in the range of myriametric and kilometer waves, and which can be fitted with standard fittings.

L'invention a donc pour objet une gaine souple multi­couches concentriques de blindage de câble électrique, notam­ment pour la protection contre le rayonnement électro-magné­tique à basses fréquences, caractérisée en ce qu'elle comporte, entre deux couches isolantes, un écran à fort coefficient de perméabilité magnétique constitué par au moins une bande d'al­liage fer-nickel à structure cristalline par exemple du mumé­tal, ou d'alliage fer-nickel-bore à structure amorphe placée entre deux tresses métalliques à faible résistivité électrique et à fort taux de recouvrement.The subject of the invention is therefore a flexible concentric multilayer sheath for shielding electric cable, in particular for protection against electromagnetic radiation at low frequencies, characterized in that it comprises, between two insulating layers, a screen with a high coefficient of magnetic permeability consisting of at least one strip of iron-nickel alloy with crystal structure, for example mumetal, or of iron-nickel-boron alloy with amorphous structure placed between two metal braids with low electrical resistivity and high recovery rate .

De préférence, l'écran est constitué de deux bandes de mumétal superposées enroulées en spires jointives, placées en­tre deux tresses de cuivre étamé.Preferably, the screen is made up of two superimposed bands of metal wound in contiguous turns, placed between two tinned copper braids.

La gaine de blindage selon l'invention permet de dur­cir une installation d'une manière homogène. Elle présente une certaine souplesse ce qui permet d'utiliser le même pro­duit sur toute la longueur du câblage (partie droite ou cour­be), et peut être équipée de raccords munis d'un contact souple à la jonction du corps de sertissage et de la partie filetée du raccord qui facilitent la mise en oeuvre du produit.The shielding sheath according to the invention makes it possible to harden an installation in a homogeneous manner. It has a certain flexibility which allows the same product to be used over the entire length of the wiring (straight or curved part), and can be fitted with fittings provided with a flexible contact at the junction of the crimping body and the part threaded connection which facilitate the implementation of the product.

L'utilisation de raccords adaptés à chaque type de prise ou de presse étoupe peut renforcer l'efficacité globale du durcissement, en améliorant l'imunité électromagnétique par la limitation des risques de fuites électromagnétiques.The use of fittings adapted to each type of plug or cable gland can reinforce the overall efficiency of hardening, by improving electromagnetic immunity by limiting the risks of electromagnetic leakage.

La superposition de couches métalliques à haute per­méabilité magnétique au contact de tresses métalliques assure une continuité galvanique efficace.The superimposition of metallic layers with high magnetic permeability in contact with metallic braids ensures effective galvanic continuity.

Des avantages supplémentaires apparaîtront à la lectu­re suivante de modes de réalisation donnés à titre exemplatif et non limitatif en référence au dessin sur lequel :

  • - la figure 1 est une vue en écorché de la gaine selon l'invention.
  • - la figure 2 représenté schématiquement un raccord d'assemblage.
Additional advantages will appear on the following reading of embodiments given by way of example and without limitation with reference to the drawing in which:
  • - Figure 1 is a sectional view of the sheath according to the invention.
  • - Figure 2 schematically shown an assembly fitting.

La gaine des blindage est composée de couches concen­triques de l'intérieur vers l'extérieur, définies comme suit, autour d'un câble électrique 20.The shielding sheath is composed of concentric layers from the inside to the outside, defined as follows, around an electric cable 20.

La première couche 1 est un fil d'acier inoxydable de 2 mm de diamètre enroulé en hélice au pas de 10 mm. Ce fil a pour but d'assurer une tenue mécanique du produit aux efforts radiaux.The first layer 1 is a 2 mm diameter stainless steel wire wound in a helix with a pitch of 10 mm. The purpose of this wire is to ensure mechanical resistance of the product to radial forces.

La deuxième couche 2 est un film isolant qui a pour fonction d'éviter le contact direct du fil d'acier inoxydable et de l'élastomère et qui peut être nécessaire au niveau de la réalisation.The second layer 2 is an insulating film which has the function of avoiding direct contact with the stainless steel wire and the elastomer and which may be necessary in the production.

On trouve ensuite une troisième couche 3 en élastomère qui est une gomme silicone autoextinguible et ne présentant aucun dégagement de gaz halogène ni toxique.Then there is a third layer 3 of elastomer which is a self-extinguishing silicone gum and exhibiting no release of halogen or toxic gas.

La quatrième couche 4 est un film isolant très fin qui sépare la couche supérieure de cuivre de l'élastomère. Ce film facilite le dénudage de la gaine.The fourth layer 4 is a very thin insulating film which separates the upper layer of copper from the elastomer. This film facilitates the stripping of the sheath.

L'écran à fort coefficient de perméabilité suit une cinquième couche 5 qui est une tresse en cuivre étamé à fort taux de recouvrement.The screen with a high coefficient of permeability follows a fifth layer 5 which is a tinned copper braid with a high recovery rate.

On trouve alors deux couches 6 et 7 de mumétal d'en­viron 25 mm de large et un dizième de mm d'épaisseur enroulées en spires jointives, faisant par exemple un angle de 60° avec l'axe longitudinal de la gaine. La perméabilité magnétique re­lative du métal doit être au moins égale à 50 000.There are then two layers 6 and 7 of mumetal about 25 mm wide and a tenth of a mm thick wound in contiguous turns, for example at an angle of 60 ° with the longitudinal axis of the sheath. The relative magnetic permeability of the metal must be at least 50,000.

La bande 7 de mumétal identique à la bande 6, a pour but d'assurer un recouvrement de la partie jointive de la ban­de précédente.The purpose of the strip 7 of mumetal identical to the strip 6, is to ensure recovery of the contiguous part of the preceding strip.

Le mumétal peut être remplacé par un alliage de fer-­nickel-bore à structure amorphe, contenant éventuellement du phosphore comme celui connu sous la dénomination commerciale "MET GLAS", qui garde alors une grande perméabilité magnétique même après une éventuelle déformation mécanique.The metal can be replaced by an iron-nickel-boron alloy with an amorphous structure, possibly containing phosphorus like that known under the trade name "MET GLAS", which then retains a high magnetic permeability even after possible mechanical deformation.

L'écran est recouvert d'une tresse 8 en cuivre étamé à fort taux de recouvrement, elle-même recouverte d'une couche 9 identique à la couche 2, et d'une couche 10 en élastomère identique à la couche 3.The screen is covered with a braid 8 of tinned copper with a high recovery rate, itself covered with a layer 9 identical to layer 2, and with a layer 10 of elastomer identical to layer 3.

Enfin un revêtement 11 doit résister aux agressions mécanique et chimique notamment de l'environnement militaire.Finally, a coating 11 must resist mechanical and chemical attack, in particular from the military environment.

Lors de l'assemblage des gaines, des raccords à vis­ser classiques peuvent cependant être sertis par magnétofor­mage. L'utilisation d'un acier inoxydable austénitique étant à proscrire, et pour assurer la continuité galvanique entre les blindages magnétiques et électriques avec les plans de masse, on utilise une matière inoxydable martinsitique ou ferritique pour allier une bonne tenue à la corrosion et une qualité de perméabilité magnétique.When assembling the ducts, conventional screw connections can however be crimped by magnetoforming. The use of an austenitic stainless steel being prohibited, and to ensure galvanic continuity between the magnetic and electrical shields with the ground planes, a martinsitic or ferritic stainless material is used to combine good corrosion resistance and quality magnetic permeability.

La figure 2 montre un raccod 21 spécifique adapté à la gaine selon l'invention, comprenant une zone de sertissage 22 séparée d'une bague filetée 23, par un contact souple 24 cons­titué par exemple en bronze phosphoreux ou en cuivre, pour as­surer la continuité galvanique entre la zone de sertissage 22 et la bague 23. Un jonc 25 en acier assure le maintien mécani­que des parties 22 et 23. Enfin, la bague filetée permet le raccordement mécanique sur un étoupe 26 de câble.FIG. 2 shows a specific fitting 21 adapted to the sheath according to the invention, comprising a crimping zone 22 separated from a threaded ring 23, by a flexible contact 24 made for example of phosphorous bronze or copper, to ensure galvanic continuity between the crimping zone 22 and the ring 23. A rod 25 of steel ensures the mechanical retention of the parts 22 and 23. Finally, the threaded ring allows mechanical connection to a cable gland 26.

Claims (10)

1 - Gaine souple multicouches concentriques de blindage de câ­ble électrique (20), notamment pour la protection contre le rayonnement électro-magnétique à basses fréquences, caractéri­sée en ce qu'elle comporte, entre deux couches isolantes (2-4, 9-10), un écran (5-8) à fort coefficient de perméabilité magné­tique constitué par au moins une bande d'alliage fer-nickel à structure cristalline, ou d'alliage fer-nickel-bore à struc­ture amorphe placée entre deux tresses métalliques (5,8) à fai­ble résistivité électrique et à fort taux de recouvrement.1 - Flexible concentric multilayer sheath for shielding electric cable (20), in particular for protection against electromagnetic radiation at low frequencies, characterized in that it comprises, between two insulating layers (2-4, 9-10) , a screen (5-8) with a high coefficient of magnetic permeability constituted by at least one strip of iron-nickel alloy with crystal structure, or of iron-nickel-boron alloy with amorphous structure placed between two metallic braids (5, 8) with low electrical resistivity and high recovery rate. 2 - Gaine de blindage selon la revendication 1, caractérisée en ce qu'elle comporte, entre deux couches isolantes (2-4, 9-10), un écran (5-8) à fort coefficient de perméabilité magnétique constitué par au moins une bande de mumétal (6) placée entre deux tresses métalliques (5,8) à faible résistivité électrique et à fort taux de recouvrement.2 - Shielding sheath according to claim 1, characterized in that it comprises, between two insulating layers (2-4, 9-10), a screen (5-8) with a high coefficient of magnetic permeability constituted by at least one mumetal strip (6) placed between two metallic braids (5,8) with low electrical resistivity and high recovery rate. 3 - Gaine de blindage selon la revendication 2, caractérisée en ce que l'écran est constitué de deux bandes (6,7) de mumétal superposées enroulées en spires jointives, placées entre deux tresses métalliques (5,8).3 - Shielding sheath according to claim 2, characterized in that the screen consists of two strips (6,7) of superimposed mumetal wound in contiguous turns, placed between two metal braids (5,8). 4 - Gaine de blindage selon 3, caractérisée en ce que les ban­des de mumétal présentent chacune une largeur d'environ 25 mm et une épaisseur d'environ un dixième de mm.4 - Shielding sheath according to 3, characterized in that the mumetal strips each have a width of approximately 25 mm and a thickness of approximately one tenth of a mm. 5 - Gaine de blindage selon l'une des revendications 1 à 4, ca­ractérisée en ce que les tresses métalliques (5,8) sont en cui­vre étamé.5 - Shielding sheath according to one of claims 1 to 4, characterized in that the metal braids (5,8) are made of tinned copper. 6 - Gaine de blindage selon la revendication 1, caractérisée en ce que la couche isolante interne (2-4) est constituée, succes­sivement de l'intérieur vers l'extérieur, d'un film isolant (2), d'une couche élastomère silicone (3) et d'un film isolant (4).6 - Shielding sheath according to claim 1, characterized in that the internal insulating layer (2-4) consists, successively from the inside towards the outside, of an insulating film (2), of an elastomer layer silicone (3) and an insulating film (4). 7 - Gaine de blindage selon la revendication 1, caractérisée en ce que la couche externe (9-10) est constituée de l'intérieur vers l'extérieur, d'un film isolant (9) et d'une couche élasto­mère silicone (10).7 - Shielding sheath according to claim 1, characterized in that the outer layer (9-10) consists of the inside to the outside, an insulating film (9) and a silicone elastomer layer (10 ). 8 - Gaine selon l'une des revendications 1 à 7, caractérisée en ce qu'elle comporte en outre un fil intérieur (1) d'acier inoxydable disposée en hélice.8 - Sheath according to one of claims 1 to 7, characterized in that it further comprises an inner wire (1) of stainless steel arranged in a helix. 9 - Gaine selon l'une des revendications 1 à 8, caractérisée en ce qu'elle comporte en outre un revêtement extérieur (11) de protection mécanique et chimique, constitué par un matériau plastique.9 - Sheath according to one of claims 1 to 8, characterized in that it further comprises an outer coating (11) of mechanical and chemical protection, consisting of a plastic material. 10 - Assemblage de gaines de blindage selon l'une des revendi­cations 1 à 9, caractérisé en ce qu'il comprend des raccords vissés constitués par un matériau inoxydable martinsitique ou ferritique, serti de plus par magnéto-formage, et munis d'un contact électrique souple (24) à la jonction du corps de ser­tissage et la partie filetée du raccord.10 - assembly of shielding sheaths according to one of claims 1 to 9, characterized in that it comprises screw connections made of a martinsitic or ferritic stainless material, further crimped by magneto-forming, and provided with a contact flexible electric motor (24) at the junction of the crimping body and the threaded part of the fitting.
EP19880401091 1987-05-07 1988-05-05 Assembly of a sheath and a screw connector Expired - Lifetime EP0290343B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706446A FR2615030B1 (en) 1987-05-07 1987-05-07 CONCENTRIC MULTI-LAYER SHEATH OF CONCENTRIC SHIELDING FOR ELECTRICAL CABLE
FR8706446 1987-05-07

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EP0290343A1 true EP0290343A1 (en) 1988-11-09
EP0290343B1 EP0290343B1 (en) 1993-02-03

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DE (1) DE3878022T2 (en)
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FR2665809A1 (en) * 1990-08-10 1992-02-14 Schnitzler Charles Device for improving the quality of electrical, electroacoustic and/or video signals
WO1992006520A1 (en) * 1990-10-05 1992-04-16 Raychem S.A. Electrical connector
DE19807527A1 (en) * 1998-02-21 1999-08-26 Cit Alcatel Electric wire or cable
WO2000068959A1 (en) * 1999-05-11 2000-11-16 Axon'cable S.A. Low pass cable
FR2793593A1 (en) * 1999-05-11 2000-11-17 Axon Cable Sa Multi-layer coaxial cable for low-pass use includes magnetic screening layer between two dielectric layers
US7688036B2 (en) 2006-06-26 2010-03-30 Battelle Energy Alliance, Llc System and method for storing energy

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DE102006013553B3 (en) * 2006-03-24 2007-10-18 Nkt Cables Gmbh Arrangement for enveloping at least one cable core of an electrical cable
DE102009019797B4 (en) 2009-05-02 2014-02-20 Nkt Cables Gmbh Arrangement for magnetic field compensation in power cables

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US3963854A (en) * 1974-12-05 1976-06-15 United Kingdom Atomic Energy Authority Shielded cables
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FR2665809A1 (en) * 1990-08-10 1992-02-14 Schnitzler Charles Device for improving the quality of electrical, electroacoustic and/or video signals
WO1992006520A1 (en) * 1990-10-05 1992-04-16 Raychem S.A. Electrical connector
DE19807527A1 (en) * 1998-02-21 1999-08-26 Cit Alcatel Electric wire or cable
WO2000068959A1 (en) * 1999-05-11 2000-11-16 Axon'cable S.A. Low pass cable
FR2793594A1 (en) * 1999-05-11 2000-11-17 Axon Cable Sa CABLE PASSE-BAS
FR2793593A1 (en) * 1999-05-11 2000-11-17 Axon Cable Sa Multi-layer coaxial cable for low-pass use includes magnetic screening layer between two dielectric layers
US7688036B2 (en) 2006-06-26 2010-03-30 Battelle Energy Alliance, Llc System and method for storing energy

Also Published As

Publication number Publication date
EP0290343B1 (en) 1993-02-03
DE3878022T2 (en) 1993-07-01
FR2615030A1 (en) 1988-11-10
FR2615030B1 (en) 1990-08-24
DE3878022D1 (en) 1993-03-18

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