EP2937871B1 - Twist-resistant electrical cable - Google Patents

Twist-resistant electrical cable Download PDF

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Publication number
EP2937871B1
EP2937871B1 EP15305366.5A EP15305366A EP2937871B1 EP 2937871 B1 EP2937871 B1 EP 2937871B1 EP 15305366 A EP15305366 A EP 15305366A EP 2937871 B1 EP2937871 B1 EP 2937871B1
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EP
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Prior art keywords
electrical cable
cable according
metal wires
cable
central zone
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EP15305366.5A
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German (de)
French (fr)
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EP2937871A1 (en
Inventor
Guillaume VEGA
Philippe Michel
Nicolas Rousselet
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Nexans SA
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Nexans SA
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    • 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
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
    • 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
    • H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring

Definitions

  • the invention relates to an electric cable resistant to torsion and therefore particularly suitable for a wind-type application.
  • such cables generally have an electrical conductor in the form of several wires.
  • these flexible cables for connecting wind turbines are subjected to repeated torsional stress, of about 150 ° per meter, for several thousand cycles.
  • these torsional stresses have a harmful impact on these cables, since they can lead to the breaking of several of these conductive wires.
  • these son are preferably made of aluminum or aluminum alloys, further accentuating the risk of rupture, because of the low torsional strength of aluminum.
  • the GB2323207 discloses a hollow and flexible electrical conductor comprising a weave of individually insulated metal wires, said conductor providing a central cylindrical channel for the passage of water.
  • An inner layer and a superimposed outer layer of copper or aluminum filaments are impregnated with a polyurethane resin which is electrically insulating.
  • An electrical cable according to the invention is configured to withstand large and repeated torsional stress, while being light and retaining its electrical conduction properties.
  • the subject of the invention is an electric cable having a conductor in the form of a plurality of metal wires each comprising aluminum.
  • the main feature of a cable according to the invention is that it comprises a central zone devoid of metal son, so as to allow the metal son placed around said central zone, to slide on each other when said cable undergoes a torsional stress.
  • the conductor wires preferentially tend to break at the central zone of the cable, when said cable undergoes repeated torsion forces.
  • they have been removed from the cable, so that the remaining conductive wires, which surround the central zone, have an elongation capacity during such twisting forces. Due to this central zone devoid of conducting metal wires, a cable according to the invention can withstand repeated torsion forces while retaining its structure and thus its ability to conduct electric current.
  • Such a cable is particularly suitable for use in wind turbines, where it forms a loop and is thus subjected to significant torsional forces.
  • the fact that the conductive threads contain aluminum allows the cable to be lightened.
  • the wires of such a cable may or may not be twisted.
  • the metal wires are made solely of aluminum. This is an optimized configuration allowing maximum lightening of the cable.
  • the metal wires are made based on an alloy comprising aluminum.
  • the presence of aluminum is justified to lighten the cable.
  • the central area devoid of metal son is cylindrical. This is a configuration that is easy to manufacture and symmetries the structure of the cable.
  • the ratio of the diameter of the central zone to the total diameter of the conductor is between 0.10 and 0.5. Indeed, it has been observed that over such a range of this ratio, the cable could both provide good electrical conduction and effectively withstand repeated torsional forces without altering its original structure. Preferably, this ratio is 0.33.
  • the central zone is empty and is delimited by metal wires of the conductor.
  • this central zone constitutes a zone of clearance.
  • the metal son present in the cable can come to occupy this central area and thus avoid breaking.
  • the fact that the central zone is empty makes it possible to accentuate the lightening of the cable.
  • the central zone is filled with a non-conductive fill material.
  • This material contributes to the mechanical strength of the cable without weighing it down significantly.
  • the density of the filling material is lower than that of the metal wires.
  • the filling material is to be chosen from solid rubber, paper and aramid fiber.
  • the central zone is occupied by a spiral spring.
  • This spring is arranged in the cable so that its axis of revolution coincides with the central longitudinal axis of the cable.
  • This spring contributes to the mechanical strength of the cable.
  • the spring can relax by elongating, and thus reduce the diameter of its turns, leaving room for the metal son to occupy part of the central area of said cable.
  • the spring is a hollow piece that contributes to the lightening of the cable.
  • the diameter of the metal wires is less than 1 mm. In this way, such wires guarantee the flexibility of the cable.
  • the diameter of the metal wires is 0.6 mm.
  • the cable comprises a polymer sheath surrounding the metal wires of the electrical conductor.
  • the central zone comprises an optical fiber. Since the central zone of the cable is not occupied by conducting metal wires, any type of additional cable can come to occupy said central zone, according to the needs met.
  • An optical fiber is an appropriate example of this type of additional cable, because it is light and compact,
  • An electric cable according to the invention has the advantage of being light and resistant to repeated torsion forces, and is therefore perfectly suitable for a wind-type application. It has the advantage of having good mechanical strength and good flexibility. He finally presents the advantage of having a relatively constant cost, or even reduced, compared to an existing cable and having a solid cylindrical conductor consisting of a plurality of metal son, due to a limited number of said metal son.
  • the flexible cables 1 for connecting a turbine 2 of wind turbine 3 are subjected to repeated torsional stress, of the order of 150 ° per meter, for several thousand cycles.
  • These cables 1 each comprise an electrical conductor in the form of a plurality of metal wires, and more specifically aluminum wires.
  • Aluminum has the distinction of being both light and good electrical conductor, but being able to withstand torsional forces over time.
  • this conductor has generally the shape of a solid cylinder, and is surrounded by a polymer sheath.
  • the electrical cables for connecting a turbine 2 of a wind turbine 3 according to the invention are designed so as to be devoid of central wires made of aluminum, so that the driver takes on the general shape.
  • the central channel is cylindrical.
  • the central channel 7 of the cable 10 is occupied by a spiral spring 8, having an axis of revolution passing through said spring 8 at the center of each turn the constituent.
  • This spring 8 is disposed in the channel 7 so that its axis of revolution is coincident with the axis of revolution of said central channel 7.
  • the spring 8 is s' stretching in the channel 7 by progressively reducing the diameter of its turns, thus creating a free space to allow the aluminum wires constituting the hollow cylindrical conductor 4 to occupy part of this central channel 7, left vacant by said spring 8 in traction.
  • Such a cable 10 is surrounded by a sheath 6 made of polymer, placed around the aluminum wires 5.
  • the central channel 7 is occupied by a filling material 9, which is lighter than aluminum and which is electrically insulating.
  • This material may for example be paper, a rigid rubber or aramid fiber.
  • the cable 100 is surrounded by a sheath 6 made of polymer, placed around the aluminum wires 5.
  • the central channel is empty and is delimited by the remaining wires in aluminum.
  • This empty channel serves as a clearance zone to allow the aluminum son delimiting it to come occupy it during a torsion effort. In this way, said son can react to such a torsional force by moving in the central channel of the cable, without risk of breaking.
  • the central channel 7 can be crossed by any type of cable that can perform a specific function, such as an optical fiber.
  • the ratio of the diameter of the internal channel 7 to the diameter of the conductor 4 of the cable 1, 10, 100 should be between 0.10 and 0.5 so that said cable 1, 10, 100 can both drive efficiently. electrical current and withstand twisting forces without degrading.

Description

L'invention se rapporte à un câble électrique résistant à la torsion et donc particulièrement adapté à une application de type éolienne. En effet, de tels câbles possèdent généralement un conducteur électrique sous la forme de plusieurs fils métalliques. Pendant leur utilisation, ces câbles souples de branchement des turbines éoliennes sont soumis à des contraintes répétées de torsion, d'environ 150° par mètre, pendant plusieurs milliers de cycles. Or, ces contraintes de torsion ont un impact nocif sur ces câbles, car elles peuvent conduire à la rupture de plusieurs de ces fils conducteurs. De plus, pour des raisons essentiellement de gain de masse, ces fils sont préférentiellement réalisés en aluminium ou alliages d'aluminium, accentuant encore plus le risque de rupture, à cause de la faible résistance en torsion de l'aluminium.The invention relates to an electric cable resistant to torsion and therefore particularly suitable for a wind-type application. Indeed, such cables generally have an electrical conductor in the form of several wires. During their use, these flexible cables for connecting wind turbines are subjected to repeated torsional stress, of about 150 ° per meter, for several thousand cycles. However, these torsional stresses have a harmful impact on these cables, since they can lead to the breaking of several of these conductive wires. In addition, for reasons mainly of weight gain, these son are preferably made of aluminum or aluminum alloys, further accentuating the risk of rupture, because of the low torsional strength of aluminum.

Le brevet GB2323207 décrit un conducteur électrique creux et souple, comprenant un tissage de fils métalliques individuellement isolés, ledit conducteur ménageant un canal cylindrique central pour le passage de l'eau. Une couche interne et une couche externe superposée de filaments en cuivre ou en aluminium sont imprégnées d'une résine en polyuréthane qui est électriquement isolante.The GB2323207 discloses a hollow and flexible electrical conductor comprising a weave of individually insulated metal wires, said conductor providing a central cylindrical channel for the passage of water. An inner layer and a superimposed outer layer of copper or aluminum filaments are impregnated with a polyurethane resin which is electrically insulating.

Un câble électrique selon l'invention est configuré pour résister à des efforts de torsion importants et répétés, tout en étant léger et en conservant ses propriétés de conduction électrique.An electrical cable according to the invention is configured to withstand large and repeated torsional stress, while being light and retaining its electrical conduction properties.

L'invention a pour objet un câble électrique possédant un conducteur sous la forme de plusieurs fils métalliques comprenant chacun de l'aluminium.The subject of the invention is an electric cable having a conductor in the form of a plurality of metal wires each comprising aluminum.

La principale caractéristique d'un câble selon l'invention est qu'il comprend une zone centrale dépourvue de fils métallique, de manière à permettre aux fils métalliques placés autour de ladite zone centrale, de glisser les uns sur les autres lorsque ledit câble subit un effort de torsion. En effet, il a été observé que les fils conducteurs avaient préférentiellement tendance à se rompre au niveau de la zone centrale du câble, lorsque ledit câble subissait des efforts de torsion répétés. Afin donc d'éviter que les fils métalliques centraux ne se rompent, ceux-ci ont été retirés du câble, de manière à ce que les fils conducteurs restants, et qui encadrent la zone centrale, aient une capacité d'allongement lors de tels efforts de torsion. Grâce à cette zone centrale dépourvue de fils métalliques conducteurs, un câble selon l'invention peut résister à des efforts répétés de torsion en conservant sa structure et donc son aptitude à conduire le courant électrique. Un tel câble est particulièrement adapté pour être utilisé dans des éoliennes, où il forme une boucle et se retrouve ainsi soumis à des efforts de torsion importants. Le fait que les fils conducteurs contiennent de l'aluminium permet au câble d'être allégé. Les fils métalliques d'un tel câble, peuvent être ou non torsadés.The main feature of a cable according to the invention is that it comprises a central zone devoid of metal son, so as to allow the metal son placed around said central zone, to slide on each other when said cable undergoes a torsional stress. Indeed, it has been observed that the conductor wires preferentially tend to break at the central zone of the cable, when said cable undergoes repeated torsion forces. In order to prevent the central wires from breaking, they have been removed from the cable, so that the remaining conductive wires, which surround the central zone, have an elongation capacity during such twisting forces. Due to this central zone devoid of conducting metal wires, a cable according to the invention can withstand repeated torsion forces while retaining its structure and thus its ability to conduct electric current. Such a cable is particularly suitable for use in wind turbines, where it forms a loop and is thus subjected to significant torsional forces. The fact that the conductive threads contain aluminum allows the cable to be lightened. The wires of such a cable may or may not be twisted.

Selon un premier mode de réalisation préféré d'un câble selon l'invention, les fils métalliques sont réalisés uniquement en aluminium. Il s'agit d'une configuration optimisée permettant un allègement maximal du câble.According to a first preferred embodiment of a cable according to the invention, the metal wires are made solely of aluminum. This is an optimized configuration allowing maximum lightening of the cable.

Selon un deuxième mode de réalisation préféré d'un câble selon l'invention, les fils métalliques sont réalisés à base d'un alliage comprenant de l'aluminium. La présence d'aluminium se justifie pour alléger le câble.According to a second preferred embodiment of a cable according to the invention, the metal wires are made based on an alloy comprising aluminum. The presence of aluminum is justified to lighten the cable.

Avantageusement, la zone centrale dépourvue de fils métalliques est de forme cylindrique. Il s'agit d'une configuration facile à fabriquer et qui symétrise la structure du câble.Advantageously, the central area devoid of metal son is cylindrical. This is a configuration that is easy to manufacture and symmetries the structure of the cable.

De façon préférentielle, le rapport du diamètre de la zone centrale sur le diamètre total du conducteur est compris entre 0.10 et 0.5. En effet, il a été observé que sur une telle plage de ce rapport, le câble pouvait à la fois assurer une conduction électrique de bonne qualité et résister efficacement à des efforts de torsion répétés sans altérer sa structure originelle. Préférentiellement, ce rapport vaut 0.33.Preferably, the ratio of the diameter of the central zone to the total diameter of the conductor is between 0.10 and 0.5. Indeed, it has been observed that over such a range of this ratio, the cable could both provide good electrical conduction and effectively withstand repeated torsional forces without altering its original structure. Preferably, this ratio is 0.33.

De façon avantageuse, la zone centrale est vide et est délimitée par des fils métalliques du conducteur. De cette manière, cette zone centrale constitue une zone de dégagement. Ainsi, lors d'un effort de torsion, les fils métalliques présents dans le câble peuvent venir occuper cette zone centrale et évitent ainsi de se rompre. Le fait que la zone centrale soit vide, permet d'accentuer l'allégement du câble.Advantageously, the central zone is empty and is delimited by metal wires of the conductor. In this way, this central zone constitutes a zone of clearance. Thus, during a twisting force, the metal son present in the cable can come to occupy this central area and thus avoid breaking. The fact that the central zone is empty makes it possible to accentuate the lightening of the cable.

Avantageusement, la zone centrale est remplie par un matériau de remplissage non conducteur de courant. Ce matériau participe à la tenue mécanique du câble sans l'alourdir de façon significative.Advantageously, the central zone is filled with a non-conductive fill material. This material contributes to the mechanical strength of the cable without weighing it down significantly.

De façon préférentielle, la densité du matériau de remplissage est inférieure à celle des fils métalliques.Preferably, the density of the filling material is lower than that of the metal wires.

Préférentiellement, le matériau de remplissage est à choisir parmi du caoutchouc solide, du papier et de la fibre d'aramide.Preferably, the filling material is to be chosen from solid rubber, paper and aramid fiber.

De façon avantageuse, la zone centrale est occupée par un ressort à spirales. Ce ressort est disposé dans le câble de sorte que son axe de révolution soit confondu avec l'axe longitudinal central du câble. Ce ressort participe à la tenue mécanique du câble. De plus, lors d'efforts de torsion répétés sur le câble, le ressort peut se détendre en s'allongeant, et diminuer ainsi le diamètre de ses spires, laissant de la place aux fils métalliques pour venir occuper une partie de la zone centrale dudit câble. Enfin, le ressort est une pièce creuse qui participe à l'allègement du câble.Advantageously, the central zone is occupied by a spiral spring. This spring is arranged in the cable so that its axis of revolution coincides with the central longitudinal axis of the cable. This spring contributes to the mechanical strength of the cable. In addition, during repeated torsion forces on the cable, the spring can relax by elongating, and thus reduce the diameter of its turns, leaving room for the metal son to occupy part of the central area of said cable. Finally, the spring is a hollow piece that contributes to the lightening of the cable.

De façon préférentielle, le diamètre des fils métalliques est inférieur à 1mm. De cette manière, de tels fils garantissent la souplesse du câble.Preferably, the diameter of the metal wires is less than 1 mm. In this way, such wires guarantee the flexibility of the cable.

Préférentiellement, le diamètre des fils métalliques est de 0.6mm.Preferably, the diameter of the metal wires is 0.6 mm.

De façon avantageuse, le câble comprend une gaine en polymère entourant les fils métalliques du conducteur électrique.Advantageously, the cable comprises a polymer sheath surrounding the metal wires of the electrical conductor.

Avantageusement, la zone centrale comprend une fibre optique. Puisque la zone centrale du câble n'est pas occupée par des fils métalliques conducteurs, tout type de câble additionnel peut venir occuper ladite zone centrale, en fonction des besoins rencontrés. Une fibre optique constitue un exemple approprié de ce type de câble additionnel, car elle est légère et peu encombrante,Advantageously, the central zone comprises an optical fiber. Since the central zone of the cable is not occupied by conducting metal wires, any type of additional cable can come to occupy said central zone, according to the needs met. An optical fiber is an appropriate example of this type of additional cable, because it is light and compact,

Un câble électrique selon l'invention présente l'avantage d'être léger et résistant aux efforts de torsion répétés, et est donc parfaitement adapté à une application de type éolienne. Il a de plus l'avantage de posséder une bonne tenue mécanique et de présenter une bonne flexibilité. Il présente enfin l'avantage de posséder un coût relativement constant, voire réduit, par rapport à un câble existant et possédant un conducteur cylindrique plein constitué d'une pluralité de fils métalliques, en raison d'un nombre limité desdits fils métalliques.An electric cable according to the invention has the advantage of being light and resistant to repeated torsion forces, and is therefore perfectly suitable for a wind-type application. It has the advantage of having good mechanical strength and good flexibility. He finally presents the advantage of having a relatively constant cost, or even reduced, compared to an existing cable and having a solid cylindrical conductor consisting of a plurality of metal son, due to a limited number of said metal son.

On donne ci-après, une description détaillée de trois modes de réalisation préférés d'un câble électrique selon l'invention en se référant aux figures 1 à 4B.

  • La figure 1 est une vue schématique d'une éolienne fonctionnant avec un câble selon l'invention,
  • La figure 2 est une vue montrant l'agencement d'un câble selon l'invention, utilisé dans le cadre d'une éolienne,
  • La figure 3A est une vue en perspective de l'extrémité d'un premier mode de réalisation préféré d'un câble selon l'invention,
  • La figure 3B est une vue en coupe transversale du câble de la figure 3B,
  • La figure 4A est une vue en perspective de l'extrémité d'un deuxième mode de réalisation préféré d'un câble selon l'invention,
  • La figure 4B est une vue en coupe transversale du câble de la figure 4B.
The following is a detailed description of three preferred embodiments of an electrical cable according to the invention with reference to the Figures 1 to 4B .
  • The figure 1 is a schematic view of a wind turbine operating with a cable according to the invention,
  • The figure 2 is a view showing the arrangement of a cable according to the invention, used in the context of a wind turbine,
  • The figure 3A is a perspective view of the end of a first preferred embodiment of a cable according to the invention,
  • The figure 3B is a cross-sectional view of the cable from the figure 3B ,
  • The Figure 4A is a perspective view of the end of a second preferred embodiment of a cable according to the invention,
  • The Figure 4B is a cross-sectional view of the cable from the Figure 4B .

En se référant aux figures 1 et 2, les câbles souples 1 de branchement d'une turbine 2 d'éolienne 3 sont soumis à des contraintes répétées de torsion, de l'ordre de 150° par mètre, pendant plusieurs milliers de cycles.Referring to Figures 1 and 2 , the flexible cables 1 for connecting a turbine 2 of wind turbine 3 are subjected to repeated torsional stress, of the order of 150 ° per meter, for several thousand cycles.

Ces câbles 1 comprennent chacun un conducteur électrique sous la forme d'une pluralité de fils métalliques, et plus spécifiquement de fils en aluminium. L'aluminium possède la particularité d'être à la fois léger et bon conducteur électrique, mais d'être en revanche peut résistant aux efforts de torsion dans le temps. Pour les câbles 1 déjà existants, ce conducteur a globalement la forme d'un cylindre plein, et est entouré par une gaine en polym ère.These cables 1 each comprise an electrical conductor in the form of a plurality of metal wires, and more specifically aluminum wires. Aluminum has the distinction of being both light and good electrical conductor, but being able to withstand torsional forces over time. For existing cables 1, this conductor has generally the shape of a solid cylinder, and is surrounded by a polymer sheath.

La conséquence de ces contraintes répétées de torsion est une rupture des fils en aluminium au centre du conducteur, qui dégradent la tenue mécanique du câble 1 ainsi que son aptitude à conduire efficacement le courant électrique.The consequence of these repeated torsional stresses is a breakage of the aluminum wires in the center of the conductor, which degrade the mechanical strength of the cable 1 as well as its ability to effectively conduct the electric current.

Afin de remédier à ce phénomène de rupture, les câbles électriques de branchement d'une turbine 2 d'éolienne 3 selon l'invention, sont conçus de manière à être dépourvus de fils centraux en aluminium, de sorte que le conducteur revête la forme générale d'un cylindre creux présentant un canal central sans fils 5 en aluminium. Préférentiellement, le canal central est cylindrique.In order to remedy this phenomenon of rupture, the electrical cables for connecting a turbine 2 of a wind turbine 3 according to the invention are designed so as to be devoid of central wires made of aluminum, so that the driver takes on the general shape. a hollow cylinder having a central channel without wires 5 of aluminum. Preferably, the central channel is cylindrical.

En se référant aux figures 3A et 3B, selon un premier mode de réalisation préféré d'un câble 10 selon l'invention, le canal central 7 du câble 10 est occupé par un ressort 8 à spirales, présentant un axe de révolution traversant ledit ressort 8 au niveau du centre de chaque spire le constituant. Ce ressort 8 est disposé dans le canal 7 de manière à ce que son axe de révolution soit confondu avec l'axe de révolution dudit canal central 7. De cette manière, lors d'un effort de torsion marqué, le ressort 8 va s'étirer dans le canal 7 en réduisant progressivement le diamètre de ses spires, créant ainsi un espace libre pour permettre aux fils 5 en aluminium constituant le conducteur 4 cylindrique creux, de venir occuper une partie de ce canal 7 central, laissée vacante par ledit ressort 8 en traction. Un tel câble 10 est entouré par une gaine 6 en polymère, placée autour des fils en aluminium 5.Referring to Figures 3A and 3B according to a first preferred embodiment of a cable 10 according to the invention, the central channel 7 of the cable 10 is occupied by a spiral spring 8, having an axis of revolution passing through said spring 8 at the center of each turn the constituent. This spring 8 is disposed in the channel 7 so that its axis of revolution is coincident with the axis of revolution of said central channel 7. In this way, during a marked torsional force, the spring 8 is s' stretching in the channel 7 by progressively reducing the diameter of its turns, thus creating a free space to allow the aluminum wires constituting the hollow cylindrical conductor 4 to occupy part of this central channel 7, left vacant by said spring 8 in traction. Such a cable 10 is surrounded by a sheath 6 made of polymer, placed around the aluminum wires 5.

En se référant aux figures 4A et 4B, selon un deuxième mode de réalisation préféré d'un câble 100 selon l'invention, le canal central 7 est occupé par un matériau de remplissage 9, qui est plus léger que l'aluminium et qui est isolant électrique. Ce matériau peut par exemple être du papier, un caoutchouc rigide ou de la fibre d'aramide. Pour ce mode de réalisation, le câble 100 est entouré par une gaine 6 en polymère, placée autour des fils en aluminium 5.Referring to Figures 4A and 4B according to a second preferred embodiment of a cable 100 according to the invention, the central channel 7 is occupied by a filling material 9, which is lighter than aluminum and which is electrically insulating. This material may for example be paper, a rigid rubber or aramid fiber. For this embodiment, the cable 100 is surrounded by a sheath 6 made of polymer, placed around the aluminum wires 5.

Selon un premier mode de réalisation préféré d'un câble selon l'invention, le canal central est vide et est délimité par les fils restants en aluminium. Ce canal vide sert de zone de dégagement pour permettre aux fils en aluminium le délimitant, de venir l'occuper lors d'un effort de torsion. De cette manière, lesdits fils peuvent réagir à un tel effort de torsion en se déplaçant dans le canal central du câble, sans risque de se rompre.According to a first preferred embodiment of a cable according to the invention, the central channel is empty and is delimited by the remaining wires in aluminum. This empty channel serves as a clearance zone to allow the aluminum son delimiting it to come occupy it during a torsion effort. In this way, said son can react to such a torsional force by moving in the central channel of the cable, without risk of breaking.

Pour les trois modes de réalisation préférés qui viennent d'être décrits, le canal central 7 peut être traversé par tout type de câble pouvant remplir une fonction spécifique, comme par exemple une fibre optique.For the three preferred embodiments that have just been described, the central channel 7 can be crossed by any type of cable that can perform a specific function, such as an optical fiber.

Il a été de plus observé que le rapport du diamètre du canal interne 7 sur le diamètre du conducteur 4 du câble 1, 10, 100 devait être compris entre 0.10 et 0.5 pour que ledit câble 1, 10, 100 puisse à la fois conduire efficacement le courant électrique et résister aux efforts de torsion sans se dégrader.It has further been observed that the ratio of the diameter of the internal channel 7 to the diameter of the conductor 4 of the cable 1, 10, 100 should be between 0.10 and 0.5 so that said cable 1, 10, 100 can both drive efficiently. electrical current and withstand twisting forces without degrading.

Claims (14)

  1. An electrical cable (10, 100) having a conductor (4) in the form of several stripped metal wires (5) each comprising aluminum, characterized in that it comprises a central zone (7) with no metal wires (5), so as to allow the stripped metal wires (5) placed around said central zone (7) to slide on one another when said cable (10, 100) undergoes a twisting force.
  2. The electrical cable according to claim 1, characterized in that the metal wires (5) are made from aluminum only.
  3. The electrical cable according to claim 1, characterized in that the metal wires (5) are made with a base of an alloy comprising aluminum.
  4. The electrical cable according to any one of claims 1 to 3, characterized in that the central zone (7) with no metal wires (5) is cylindrical.
  5. The electrical cable according to claim 4, characterized in that the ratio of the diameter of the central zone (7) to the total diameter of the conductor (4) is comprised between 0.10 and 0.5.
  6. The electrical cable according to any one of claims 1 to 5, characterized in that the central zone (7) is empty and is defined by metal wires (5) of the conductor (4).
  7. The electrical cable according to any one of claims 1 to 5, characterized in that the central zone (7) is filled with a filler material (9) that does not conduct current.
  8. The electrical cable according to claim 7, characterized in that the density of the filler material (9) is lower than that of the metal wires.
  9. The electrical cable according to any one of claims 7 or 8, characterized in that the filler material (9) is to be chosen from among solid rubber, paper and aramid fiber.
  10. The electrical cable according to any one of claims 1 to 6, characterized in that the central zone (7) is occupied by a spiral spring (8).
  11. The electrical cable according to any one of claims 1 to 10, characterized in that the diameter of the metal wires (5) is smaller than 1 mm.
  12. The electrical cable according to claim 11, characterized in that the diameter of the metal wires (5) is 0.6 mm.
  13. The electrical cable according to any one of claims 1 to 12, characterized in that it comprises a polymer sheath (6) surrounding the metal wires (5) of the electrical conductor (4).
  14. The electrical cable according to any one of claims 1 to 13, characterized in that the central zone (7) comprises an optical fiber.
EP15305366.5A 2014-04-22 2015-03-11 Twist-resistant electrical cable Active EP2937871B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1453611A FR3020174A1 (en) 2014-04-22 2014-04-22 TORSION RESISTANT ELECTRICAL CABLE

Publications (2)

Publication Number Publication Date
EP2937871A1 EP2937871A1 (en) 2015-10-28
EP2937871B1 true EP2937871B1 (en) 2016-10-12

Family

ID=51168148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15305366.5A Active EP2937871B1 (en) 2014-04-22 2015-03-11 Twist-resistant electrical cable

Country Status (4)

Country Link
EP (1) EP2937871B1 (en)
DK (1) DK2937871T3 (en)
ES (1) ES2608666T3 (en)
FR (1) FR3020174A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3144743A1 (en) * 1981-11-11 1983-05-19 U.I. Lapp Kg, 7000 Stuttgart Electric, flexible line with particular resistance to torsional stress
GB2323207A (en) 1997-03-11 1998-09-16 Elscint Ltd Flexible hollow electrical cable
EP2599090A1 (en) * 2010-07-26 2013-06-05 DSM IP Assets B.V. Tether for renewable energy systems
CN201845586U (en) * 2010-09-30 2011-05-25 中利科技集团股份有限公司 Flexible tensile wind-power electric cable
CN201984860U (en) * 2010-12-13 2011-09-21 巢冬菊 Stretch-proof cable
CN202694899U (en) * 2012-05-16 2013-01-23 安徽华峰电缆集团有限公司 Light soft cable for wind power generation

Also Published As

Publication number Publication date
DK2937871T3 (en) 2017-01-23
FR3020174A1 (en) 2015-10-23
EP2937871A1 (en) 2015-10-28
ES2608666T3 (en) 2017-04-12

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