EP2458687A1 - Bonding assembly made up of a high-voltage power cable and a connection device - Google Patents

Bonding assembly made up of a high-voltage power cable and a connection device Download PDF

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Publication number
EP2458687A1
EP2458687A1 EP11190232A EP11190232A EP2458687A1 EP 2458687 A1 EP2458687 A1 EP 2458687A1 EP 11190232 A EP11190232 A EP 11190232A EP 11190232 A EP11190232 A EP 11190232A EP 2458687 A1 EP2458687 A1 EP 2458687A1
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EP
European Patent Office
Prior art keywords
tubular portion
assembly according
lug
stepped tube
cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11190232A
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German (de)
French (fr)
Inventor
Eric Gery
Patrick Riviere
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.)
Mecatraction SAS
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Mecatraction SAS
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Filing date
Publication date
Application filed by Mecatraction SAS filed Critical Mecatraction SAS
Publication of EP2458687A1 publication Critical patent/EP2458687A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/53—Bases or cases for heavy duty; Bases or cases for high voltage with means for preventing corona or arcing

Definitions

  • the invention relates to the general field of electrical connection, and in particular to electrical connection assemblies formed by a high-voltage electrical cable and a connection device to be fixed on a bare terminal section of the electric cable.
  • This electric cable conventionally comprises a conductive core, a semiconductor layer covering the conductive core except on the stripped end portion and an insulating layer covering the semiconductor layer.
  • the connection device is formed by a lug having a flat portion of electrical connection to an element with which said lug is configured to cooperate, and having a longitudinally extending tubular portion adapted to receive, in its hollow, the stripped terminal section of the electric cable.
  • HTA high voltage electrical cable
  • a current of 1 kV to 50 kV, and in particular of 6.6 kV to 15 kV can be circulated, since the electric field near the pod is irregular.
  • the invention aims to improve this type of electrical connection assembly to use.
  • connection device comprising a terminal formed by an electrical connection portion to an element with which said connection device is configured to cooperate and a first longitudinally extending tubular portion adapted to at least partially receive, in its hollow, said stripped end section of the electric cable, characterized in that said connection device further comprises a stepped tube having an inclined transverse shoulder of which angle of inclination with respect to said longitudinal direction is in the range [75 °; 95 °], and said at least partially insulating layer is at least partially in contact with said shoulder.
  • the contact between a cut edge of the at least partially insulating layer and the shoulder may not be a close contact. It is important that during the insertion of the cable into the connection device, the at least partially insulating layer and / or the at least partially conductive layer abut against the shoulder. Then, it is possible that the at least partially insulating layer and / or the at least partially conductive layer deviate very slightly from the shoulder due to the manipulation of the assembly before and after the assembly of the device and the cable. .
  • This gap is electrically negligible and it is considered that there is contact, at least electrical, as long as the smallest distance separating the at least partially conductive layer and an inner surface of the stepped tube is less than or equal to about 2 mm. . Indeed, this distance is sufficiently small that the air between the at least partially conductive layer and the stepped tube can not be electrically charged until an electric discharge occurs.
  • the connecting device comprises a stepped tube having an inclined transverse shoulder forming a stop during insertion of the cable thus allows the at least partially conductive layer to remain in close proximity (less than about 2 mm) of the inner surface. of the stepped tube.
  • an equipotential bonding, or almost, is formed at this point of the cable and the electrical discharges are suppressed, or in any case significantly reduced.
  • the electric arcs formed by these discharges are reduced or canceled.
  • the shoulder is for example at right angles to the insertion direction of the electric cable in the connection device.
  • this shoulder is different from a slightly inclined portion, often called a chamfer, helping the insertion of the electric cable, and whose angle of inclination with respect to the longitudinal direction is generally within a range [20 ° ; 50 °].
  • the stepped tube and said lug are in one piece.
  • the stepped tube and said lug are distinct.
  • the stepped tube has a third tubular portion configured to be disposed at least partially within the first tubular portion of said lug.
  • the third tubular portion has an inner diameter approximately equal to the section of said conductive core of said electric cable, which makes it possible to reduce the internal space of the first tubular portion of the terminal and thus to tighten the conductive core more. electric cable. In the case of a multi-strand cable, this reduces the gaps between the strands.
  • the figure 1 illustrates very schematically a wind turbine 1 having a turbine provided with an electric generator 2 electrically connected to an interface of an electrical distribution network 3.
  • the generator 2 and this interface 3 are electrically connected by an electrical connection assembly formed by a flexible electric cable 4 type HTA, that is to say multi-strand, and two connection devices 5 and 6 attached to each end cable 4.
  • a flexible electric cable 4 type HTA that is to say multi-strand
  • the electric generator 2 has a connection terminal 7 on which is mounted a lug 11 of the connection device 5 illustrated very schematically on the figure 1 .
  • the interface 3 of the electrical distribution network has a connection terminal 8 on which is mounted a lug 10 of the connection device 6 also very schematically illustrated on the figure 1 .
  • connection device 5 mounted on the terminal 7 that we see on the left on the figure 1 as well as the electrical cable 4.
  • connection device 6 mounted on the terminal 8 that is seen to the right on the figure 1 is identical to the connection device 5 described below.
  • connection device illustrated on the Figures 2 to 5 comprises a copper lug 11 and a stepped tube 12 of copper which are distinct.
  • Lug 11 and tube 12 are both conductive.
  • the pod 11 comprises a flat portion 13 connected to a tubular portion 14 (also called the first tubular portion) by a transition portion 15 (also called the second transition portion).
  • the flat portion 13 is a contact area of generally parallelepiped shape. It has an orifice 16 adapted to receive a threaded rod (not shown) belonging to the electrical connection terminal 7 ( figure 1 ) for example provided with a support flange. To ensure the electrical contact between the terminal 7 and the lug 11, the flat portion 13 is clamped between the support flange and a nut screwed onto the threaded rod.
  • the tubular portion 14 extends longitudinally and has a constant outside diameter throughout its length.
  • the tubular portion 14 further has a chamfer 17 (also called second chamfer) at a free end 18.
  • This chamfer 17 extends from the inside of this tubular portion 14 to an edge 19 of this tubular portion 14 at its end. free end 18.
  • This chamfer 17 has an angle of inclination relative to the longitudinal direction of about 45 °.
  • the transition portion 15 has a hole 20 opening into the hollow of the tubular portion 14.
  • This window 20 is formed by a cut of material 21 made in the transition portion 15. This cutout 21 is folded in the hollow of the tubular portion 14.
  • the lug 11 has a thickness in a range [1 mm; 5 mm].
  • the stepped tube 12 comprises a tubular portion 22 (also called the third tubular portion) connected to a shoulder 23 by a transition portion 24 (also called the first transition portion).
  • This stepped tube 12 further comprises another tubular portion 25 (also called second tubular portion) extending in the extension of the shoulder 23.
  • the tubular portions 22 and 25 each extend longitudinally and each have a constant outside diameter along its entire length.
  • the tubular portion 22 is adapted to be inserted into the hollow of the tubular portion 14 of the lug 11, with the outer surface of the tubular portion 22 which is adapted to be applied against the inner surface of the tubular portion 14 of the lug 11
  • the outside diameter of the tubular portion 22 of the stepped tube 12 is smaller than the outside diameter of the tubular portion 14 of the lug 11 and less but almost equal to the inside diameter of the same tubular portion 14 so that the stepped tube 12 is adapted to be inserted by force into the hollow of the tubular portion 1.
  • the transition portion 24 forms a chamfer (also called first chamfer) whose angle of inclination relative to the longitudinal direction is approximately equal to 45 °. This transition portion 24 is adapted to bear against the bevel 17 once the stepped tube 12 mounted with the lug 11.
  • the shoulder 23 extends between the transition portion 24 and the tubular portion 25 transversely to the longitudinal direction.
  • the angle of inclination of this shoulder 23 with respect to the longitudinal direction is here about 90 °.
  • the stepped tube 12 has a thickness in a range [0.2 mm; 0.6 mm].
  • the electric cable 4 comprises a core 26 formed by several strands (not shown) themselves formed by a plurality of strands 27 which allows the cable 4 to be particularly flexible.
  • This electric cable 4 further comprises a semiconductor layer 28 covering the conductive core 26, an insulating layer 29 silicone type covering the semiconductor layer 28, and an outer layer 30 formed by a polyester tape covering the insulating layer 29 and by a protective braid in synthetic and varnished fabric covering this polyester tape.
  • the electric cable 4 here has a stripped end portion 31, in other words with the semiconductor layer 28, the insulating layer 29 and the outer layer 30 which have been removed to reveal only the conductive core 26.
  • the semiconductor layer 28 has a thickness in the range [0.1 mm; 0.5 mm] and the insulating layer 29 is thicker than the semiconductor layer 28.
  • This cable 4 has an intermediate section 32 not stripped in the extension of the bare end portion 31 and in the hollow of the tubular portion 25.
  • the junction between the sections 31 and 32 is at a cut edge 33 of the semi-layer -conductor 28, a cut edge 35 of the insulating layer 29 and a cut edge 37 of the outer layer 30.
  • this intermediate section 32 In the extension of this intermediate section 32 is a main section 36 of the cable 4 which is outside the stepped tube 12.
  • the bare terminal section 31 of the cable 4 is adapted to be inserted into the hollow of the tubular portion of the lug 11 for the electrical connection of the connection device 5 with this cable 4.
  • the tubular portion 22 of the stepped tube 12 is forced into the hollow of the tubular portion 14 of the lug 11 until the transition portion 24 of the tube 12 bears against the transition portion 15 of the lug 11 In this position, the outer surface of the shoulder 23 abuts against the outer edge 19 of the lug 11.
  • connection device is thus assembled, which device has been previously or not mounted on the connection terminal 7 via the lug 11.
  • the cable 4 is then partially inserted into the connection device 5.
  • the stripped end section 31 of the cable 4 is received in the hollow of the tubular portion 14 of the lug 11, and at the same time in the hollow of the tubular portion 22 of the tube 12.
  • the conductive core 26 has a section which is approximately equal to the inside diameter of the tubular portion 22 of the stepped tube 12.
  • the intermediate section 32 is inserted into the connection device until the cut edge 33 of the semiconductor layer 28, the cut edge 35 of the insulating layer 29 and the cut edge 37 of the outer layer 30 abut on the inner surface of the shoulder 23 of the stepped tube 12, and more particularly at a distance of less than or equal to 2 mm (visible in Figure 2A ).
  • the window 20 formed in the transition portion 15 of the lug 11 makes it possible to verify that the cable 4 is sufficiently depressed inside lug 11.
  • the outer layer 30 is applied against the inner surface of the tubular portion 25.
  • a crimping is then performed on the contour of the tubular portion 14 of the lug 11 so as to crimp the lug 11, the stepped tube 12 via its tubular portion 22 and the electric cable 4 via its bare end portion 31.
  • the crimping is for example carried out with borrows of hexagonal shapes so as to further reduce the spaces between the strands 27 of the cable 4 at its bare end portion 31.
  • the electrical connection assembly is formed with the cut edge 33 of the semiconductor layer 28 which comes in close proximity to the inner surface of the stepped tube 12, which makes it possible to cancel, or in any case to
  • the electric disturbances generated by the peak effect at which the multi-strand electrical cable 27 is particularly subjected are eliminated considerably at the level of the bare terminal section.
  • the respective cut edges 33, 35 and 37 remain at a very small distance from the stepped tube 12.
  • the cut edges 35 and 37 move only a very small distance from the inner surface of the shoulder 23 and the cut edge 33 is at a distance D less than or equal to about 2 mm from the inner surface of the chamfer 24.
  • the figure 6 illustrates a second embodiment of the connection device.
  • connection device 105 illustrated on the figure 6 comprises a lug 111, here made of copper, and a stepped tube 112, here also made of copper, which lug 11 and tube 112 are made in one piece.
  • connection device 105 has a tubular portion 125 of the same thickness as the tubular portion 114.
  • connection device 105 does not have a tubular portion 22 like that of the connection device 5.
  • the insertion of the electric cable 104 into the connection device 105 is carried out in a manner similar to the insertion of the electric cable 4 into the connection device 5.
  • the cut edge 135 of the insulating layer 129 abuts on the inner surface of the shoulder 123 (and may deviate very slightly thereafter) and the cut edge 133 of the semiconductor layer 128 is at most at a distance less than or equal to approximately 2 mm from the inner surface of the chamfer.
  • the electrical connection assembly according to the invention is intended to equip more generally high voltage machines such as transformers, generators, motors, etc., in wind power or in other areas, for example in traction.

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

The assembly has a high voltage electrical cable (4) comprising a semi-conducting layer (28) covering a conducting core (26) except on a bare end section (31). A connection device (5) has a lug (11) formed by a flat portion (13) i.e. contact pad, to an electric generator. A tubular portion (14) longitudinally extends to partially receive the portion. The device has a stepped tube (12) with an inclined transverse shoulder (23) whose inclination angle relative to longitudinal direction ranges in interval of 75 and 95 degrees. A silicone insulating layer (29) is in partial contact with shoulder.

Description

L'invention a trait au domaine général de la connectique électrique, et en particulier aux ensembles de liaison électrique formés par un câble électrique haute tension et un dispositif de connexion à fixer sur un tronçon terminal dénudé du câble électrique.The invention relates to the general field of electrical connection, and in particular to electrical connection assemblies formed by a high-voltage electrical cable and a connection device to be fixed on a bare terminal section of the electric cable.

On connaît déjà un tel ensemble de liaison électrique formé par un câble électrique haute tension et un dispositif de connexion à fixer sur un tronçon terminal dénudé du câble électrique. Ce câble électrique comporte de manière conventionnelle une âme conductrice, une couche semi-conductrice recouvrant l'âme conductrice sauf sur le tronçon terminal dénudé et une couche isolante recouvrant la couche semi-conductrice. Le dispositif de connexion est formé par une cosse ayant une portion plate de raccordement électrique à un élément avec lequel ladite cosse est configurée pour coopérer, et ayant une portion tubulaire s'étendant longitudinalement prévue pour recevoir, dans son creux, le tronçon terminal dénudé du câble électrique.Already known such a set of electrical connection formed by a high-voltage electrical cable and a connection device to be fixed on a bare end section of the electric cable. This electric cable conventionally comprises a conductive core, a semiconductor layer covering the conductive core except on the stripped end portion and an insulating layer covering the semiconductor layer. The connection device is formed by a lug having a flat portion of electrical connection to an element with which said lug is configured to cooperate, and having a longitudinally extending tubular portion adapted to receive, in its hollow, the stripped terminal section of the electric cable.

Lorsque le câble électrique est alimenté, autrement dit lorsqu'un courant circule dans ce câble, une décharge électrique apparaît sur l'âme conductrice du tronçon terminal dénudé du câble électrique entre un bord coupé de la couche semi-conductrice et un bord libre de la portion tubulaire de la cosse. Cette décharge électrique est provoquée par une différence de potentiel électrique dans l'espace entre le bord coupé de la couche semi-conductrice et le bord libre de la cosse (conductrice elle aussi).When the electric cable is powered, that is to say when a current flows in this cable, an electric discharge appears on the conductive core of the stripped end portion of the electric cable between a cut edge of the semiconductor layer and a free edge of the tubular portion of the pod. This electric discharge is caused by a difference in electrical potential in the space between the cut edge of the semiconductor layer and the free edge of the terminal (also conductive).

Ce phénomène de décharge électrique est accentué dans le cas de câble électrique haute tension, appelé par exemple HTA, dans lequel peut circuler un courant de 1 kV à 50 kV, et en particulier de 6,6 kV à 15 kV, puisque le champ électrique à proximité de la cosse est irrégulier.This phenomenon of electric discharge is accentuated in the case of high voltage electrical cable, called for example HTA, in which a current of 1 kV to 50 kV, and in particular of 6.6 kV to 15 kV, can be circulated, since the electric field near the pod is irregular.

Ce phénomène est encore accentué dans le cas de câbles électriques de faible rayon de courbure (par exemple des câbles multi-brins) car au voisinage d'une partie conductrice de faible rayon de courbure, les lignes de champs électriques se concentrent parfois dans de grandes proportions. Ce phénomène est aussi appelé effet de pointe.This phenomenon is further accentuated in the case of electric cables of small radius of curvature (for example multi-strand cables) because in the vicinity of a conductive part of small radius of curvature, the lines of Electric fields are sometimes concentrated in large proportions. This phenomenon is also called peak effect.

L'invention vise à améliorer ce type d'ensemble de liaison électrique à l'utilisation.The invention aims to improve this type of electrical connection assembly to use.

Elle propose à cet effet un ensemble de liaison électrique formé par un câble électrique haute tension et un dispositif de connexion fixé sur un tronçon terminal dénudé du câble électrique, ledit câble électrique comportant une âme conductrice, une couche au moins partiellement conductrice recouvrant ladite âme conductrice sauf sur ledit tronçon terminal dénudé et une couche au moins partiellement isolante recouvrant ladite couche au moins partiellement conductrice, ledit dispositif de connexion comportant une cosse formée par une portion de raccordement électrique à un élément avec lequel ledit dispositif de connexion est configuré pour coopérer et une première portion tubulaire s'étendant longitudinalement prévue pour recevoir au moins partiellement, dans son creux, ledit tronçon terminal dénudé du câble électrique, caractérisé en ce que ledit dispositif de connexion comporte en outre un tube étagé ayant un épaulement transversal incliné dont l'angle d'inclinaison par rapport à ladite direction longitudinale est compris dans l'intervalle [75° ; 95°], et ladite couche au moins partiellement isolante est au moins partiellement en contact avec ledit épaulement.It proposes for this purpose a set of electrical connection formed by a high-voltage electrical cable and a connection device fixed on a bare terminal section of the electric cable, said electric cable comprising a conductive core, an at least partially conductive layer covering said conductive core except on said stripped end portion and an at least partially insulating layer covering said at least partially conductive layer, said connection device comprising a terminal formed by an electrical connection portion to an element with which said connection device is configured to cooperate and a first longitudinally extending tubular portion adapted to at least partially receive, in its hollow, said stripped end section of the electric cable, characterized in that said connection device further comprises a stepped tube having an inclined transverse shoulder of which angle of inclination with respect to said longitudinal direction is in the range [75 °; 95 °], and said at least partially insulating layer is at least partially in contact with said shoulder.

Au sens de l'invention, le contact entre un bord coupé de la couche au moins partiellement isolante et l'épaulement peut ne pas être un contact étroit. Il importe que lors de l'insertion du câble dans le dispositif de connexion, la couche au moins partiellement isolante et/ou la couche au moins partiellement conductrice viennent en butée contre l'épaulement. Ensuite, il est possible que la couche au moins partiellement isolante et/ou la couche au moins partiellement conductrice s'écartent très légèrement de l'épaulement du fait de la manipulation de l'ensemble avant et après l'assemblage du dispositif et du câble. Cet écartement est électriquement négligeable et l'on considère qu'il y a contact, tout au moins électrique, tant que la plus petite distance séparant la couche au moins partiellement conductrice et une surface intérieure du tube étagé est inférieure ou égale à environ 2 mm. En effet, cette distance est suffisamment faible pour que l'air se trouvant entre la couche au moins partiellement conductrice et le tube étagé ne puisse pas se charger électriquement jusqu'à ce qu'une décharge électrique apparaisse.Within the meaning of the invention, the contact between a cut edge of the at least partially insulating layer and the shoulder may not be a close contact. It is important that during the insertion of the cable into the connection device, the at least partially insulating layer and / or the at least partially conductive layer abut against the shoulder. Then, it is possible that the at least partially insulating layer and / or the at least partially conductive layer deviate very slightly from the shoulder due to the manipulation of the assembly before and after the assembly of the device and the cable. . This gap is electrically negligible and it is considered that there is contact, at least electrical, as long as the smallest distance separating the at least partially conductive layer and an inner surface of the stepped tube is less than or equal to about 2 mm. . Indeed, this distance is sufficiently small that the air between the at least partially conductive layer and the stepped tube can not be electrically charged until an electric discharge occurs.

Le fait que le dispositif de connexion comporte un tube étagé ayant un épaulement transversal incliné formant butée lors de l'insertion du câble permet donc à la couche au moins partiellement conductrice de rester à proximité immédiate (moins de 2 mm environ) de la surface intérieure du tube étagé. Ainsi, une liaison équipotentielle, ou presque, est formée à cet endroit du câble et les décharges électriques sont supprimées, ou en tout cas significativement réduites. Les arcs électriques formés par ces décharges sont donc réduits voir annulés.The fact that the connecting device comprises a stepped tube having an inclined transverse shoulder forming a stop during insertion of the cable thus allows the at least partially conductive layer to remain in close proximity (less than about 2 mm) of the inner surface. of the stepped tube. Thus, an equipotential bonding, or almost, is formed at this point of the cable and the electrical discharges are suppressed, or in any case significantly reduced. The electric arcs formed by these discharges are reduced or canceled.

L'épaulement est par exemple à angle droit par rapport à la direction d'insertion du câble électrique dans le dispositif de connexion. Autrement dit, cet épaulement est différent d'une portion légèrement inclinée, appelée souvent chanfrein, aidant à l'insertion du câble électrique, et dont l'angle d'inclinaison par rapport à la direction longitudinale est généralement compris dans un intervalle [20°; 50°].The shoulder is for example at right angles to the insertion direction of the electric cable in the connection device. In other words, this shoulder is different from a slightly inclined portion, often called a chamfer, helping the insertion of the electric cable, and whose angle of inclination with respect to the longitudinal direction is generally within a range [20 ° ; 50 °].

Selon des caractéristiques préférées, simples, commodes et économiques de l'ensemble de liaison électrique selon l'invention :

  • l'âme conductrice du câble électrique est formée par une pluralité de brins ;
  • le tube étagé présente une deuxième portion tubulaire s'étendant longitudinalement prévue pour recouvrir un tronçon non dénudé dudit câble électrique ;
  • la deuxième portion tubulaire dudit tube étagé est dans le prolongement dudit épaulement ;
  • la deuxième portion tubulaire dudit tube étagé présente un diamètre extérieur supérieur au diamètre extérieur de ladite première portion tubulaire ;
  • le tube étagé présente une première portion de transition formant un premier chanfrein pour l'insertion de l'âme dudit câble électrique dans ledit creux de ladite première portion tubulaire ;
  • la première portion de transition est dans le prolongement dudit épaulement ; et
  • la cosse présente une deuxième portion de transition reliant ladite portion de raccordement électrique à ladite première portion tubulaire, laquelle deuxième portion de transition est pourvue d'un orifice débouchant à l'intérieur dudit creux de ladite première portion tubulaire.
According to preferred, simple, convenient and economical characteristics of the electrical connection assembly according to the invention:
  • the conductive core of the electric cable is formed by a plurality of strands;
  • the stepped tube has a second longitudinally extending tubular portion for covering a non-stripped portion of said electrical cable;
  • the second tubular portion of said stepped tube is in the extension of said shoulder;
  • the second tubular portion of said stepped tube has an outside diameter greater than the outside diameter of said first tubular portion;
  • the stepped tube has a first transition portion forming a first chamfer for insertion of the core of said electrical cable into said recess of said first tubular portion;
  • the first transition portion is in the extension of said shoulder; and
  • the lug has a second transition portion connecting said electrical connection portion to said first tubular portion, which second transition portion is provided with an opening opening into said hollow of said first tubular portion.

Selon une caractéristique préférée, simple, commode et économique de l'ensemble selon l'invention, le tube étagé et ladite cosse sont en une seule pièce.According to a preferred characteristic, simple, convenient and economical of the assembly according to the invention, the stepped tube and said lug are in one piece.

Selon une autre caractéristique préférée, simple, commode et économique de l'ensemble selon l'invention, le tube étagé et ladite cosse sont distincts.According to another preferred, simple, convenient and economical feature of the assembly according to the invention, the stepped tube and said lug are distinct.

Le cas échéant, le tube étagé présente une troisième portion tubulaire configurée pour être disposée au moins partiellement à l'intérieur de la première portion tubulaire de ladite cosse.Where appropriate, the stepped tube has a third tubular portion configured to be disposed at least partially within the first tubular portion of said lug.

De préférence, la troisième portion tubulaire présente un diamètre intérieur environ égal à la section de ladite âme conductrice dudit câble électrique, ce qui permet de réduire l'espace intérieur de la première portion tubulaire de la cosse et ainsi de serrer plus l'âme conductrice du câble électrique. Dans le cas d'un câble multi-brins, cela permet de réduire les vides entre les brins.Preferably, the third tubular portion has an inner diameter approximately equal to the section of said conductive core of said electric cable, which makes it possible to reduce the internal space of the first tubular portion of the terminal and thus to tighten the conductive core more. electric cable. In the case of a multi-strand cable, this reduces the gaps between the strands.

Selon des caractéristiques préférées, simples, commodes et économiques de l'ensemble selon l'invention :

  • la troisième portion tubulaire présente une épaisseur réduite par rapport à l'épaisseur de ladite première portion tubulaire ;
  • la deuxième portion tubulaire est reliée à ladite troisième portion tubulaire par ladite première portion de transition ; et
  • la première portion tubulaire de ladite cosse présente un deuxième chanfrein à une extrémité libre, deuxième chanfrein contre lequel est disposée ladite première portion de transition dudit tube étagé.
According to preferred, simple, convenient and economical characteristics of the assembly according to the invention:
  • the third tubular portion has a reduced thickness relative to the thickness of said first tubular portion;
  • the second tubular portion is connected to said third tubular portion by said first transition portion; and
  • the first tubular portion of said lug has a second chamfer at a free end, second chamfer against which is disposed said first transition portion of said stepped tube.

On va maintenant poursuivre l'exposé de l'invention par la description d'exemples de réalisation, donnés ci-après à titre illustratif et non limitatif, en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue en plan schématique d'une génératrice électrique, ici pour turbine éolienne reliée à un réseau électrique par l'intermédiaire d'un ensemble de liaison conforme à l'invention ;
  • la figure 2 est une vue en coupe de l'ensemble de liaison montrant partiellement un câble électrique inséré dans un dispositif de connexion électrique conformément à un premier mode de réalisation ;
  • la figure 2A est une vue d'un détail agrandi de la figure 2;
  • la figure 3 est une vue en perspective isolée du dispositif de connexion électrique ;
  • la figure 4 est une vue en perspective-coupe suivant le plan médian du dispositif de connexion de la figure 3 ;
  • la figure 5 est une vue en perspective éclatée de ce dispositif de connexion; et
  • la figure 6 est une vue semblable à la figure 2 conformément à un second mode de réalisation.
We will now continue the presentation of the invention by the description of embodiments, given below by way of illustration and without limitation, with reference to the accompanying drawings in which:
  • the figure 1 is a schematic plan view of an electric generator, here for a wind turbine connected to an electrical network via a connection assembly according to the invention;
  • the figure 2 is a sectional view of the link assembly partially showing an electrical cable inserted into an electrical connection device according to a first embodiment;
  • the Figure 2A is a view of an enlarged detail of the figure 2 ;
  • the figure 3 is an isolated perspective view of the electrical connection device;
  • the figure 4 is a perspective-section view along the median plane of the connection device of the figure 3 ;
  • the figure 5 is an exploded perspective view of this connection device; and
  • the figure 6 is a view similar to the figure 2 according to a second embodiment.

La figure 1 illustre très schématiquement une éolienne 1 ayant une turbine pourvue d'une génératrice électrique 2 connectée électriquement à une interface d'un réseau de distribution électrique 3.The figure 1 illustrates very schematically a wind turbine 1 having a turbine provided with an electric generator 2 electrically connected to an interface of an electrical distribution network 3.

La génératrice 2 et cette interface 3 sont reliées électriquement par un ensemble de liaison électrique formé par un câble électrique 4 souple de type HTA, c'est-à-dire multi-brins, et deux dispositifs de connexion 5 et 6 fixés à chaque extrémité du câble 4.The generator 2 and this interface 3 are electrically connected by an electrical connection assembly formed by a flexible electric cable 4 type HTA, that is to say multi-strand, and two connection devices 5 and 6 attached to each end cable 4.

La génératrice électrique 2 présente une borne de connexion 7 sur laquelle est montée une cosse 11 du dispositif de connexion 5 illustré de façon très schématique sur la figure 1.The electric generator 2 has a connection terminal 7 on which is mounted a lug 11 of the connection device 5 illustrated very schematically on the figure 1 .

L'interface 3 du réseau de distribution électrique présente une borne de connexion 8 sur laquelle est montée une cosse 10 du dispositif de connexion 6 illustré également de façon très schématique sur la figure 1.The interface 3 of the electrical distribution network has a connection terminal 8 on which is mounted a lug 10 of the connection device 6 also very schematically illustrated on the figure 1 .

Dans les installations électriques de type éolien, il est généralement nécessaire d'utiliser un câble électrique HTA souple car ce câble suit un chemin sinueux pour connecter électriquement deux éléments, ici la génératrice 2 et l'interface 3. Autrement dit, le câble électrique 4 doit être flexible car il est courbé en plusieurs zones de manière à se faufiler entre les matériels électriques et mécaniques conventionnels (non représentés) de l'éolienne qui se trouvent dans un espace relativement réduit.In wind-powered electrical installations, it is generally necessary to use a flexible electric cable HTA because this cable follows a sinuous path to electrically connect two elements, here the generator 2 and the interface 3. In other words, the electric cable 4 must be flexible because it is bent in several areas so as to sneak between the conventional electrical and mechanical equipment (not shown) of the wind turbine which are in a relatively small space.

Des courants électriques d'au moins 6,6 kV peuvent circuler dans ce câble 4 lorsqu'il est alimenté.Electrical currents of at least 6.6 kV can flow in this cable 4 when it is powered.

On va maintenant décrire plus en détail, à l'appui des figures 2 à 5, le dispositif de connexion 5 monté sur la borne 7 que l'on voit à gauche sur la figure 1 ainsi que le câble électrique 4. Le dispositif de connexion 6 monté sur la borne 8 que l'on voit à droite sur la figure 1 est identique au dispositif de connexion 5 décrit ci-dessous.We will now describe in more detail, in support of Figures 2 to 5 , the connection device 5 mounted on the terminal 7 that we see on the left on the figure 1 as well as the electrical cable 4. The connection device 6 mounted on the terminal 8 that is seen to the right on the figure 1 is identical to the connection device 5 described below.

Le dispositif de connexion illustré sur les figures 2 à 5 comporte une cosse 11 en cuivre et un tube étagé 12 en cuivre qui sont distincts.The connection device illustrated on the Figures 2 to 5 comprises a copper lug 11 and a stepped tube 12 of copper which are distinct.

La cosse 11 et le tube 12 sont tous les deux conducteur.Lug 11 and tube 12 are both conductive.

La cosse 11 comporte une portion plate 13 reliée à une portion tubulaire 14 (aussi appelée première portion tubulaire) par une portion de transition 15 (aussi appelée deuxième portion de transition).The pod 11 comprises a flat portion 13 connected to a tubular portion 14 (also called the first tubular portion) by a transition portion 15 (also called the second transition portion).

La portion plate 13 est une plage de contact de forme globalement parallélépipédique. Elle présente un orifice 16 adapté à recevoir une tige filetée (non représentée) appartenant à la borne électrique de connexion 7 (figure 1) par exemple munie d'une collerette de support. Pour assurer le contact électrique entre la borne 7 et la cosse 11, on serre la portion plate 13 entre la collerette de support et un écrou vissé sur la tige filetée.The flat portion 13 is a contact area of generally parallelepiped shape. It has an orifice 16 adapted to receive a threaded rod (not shown) belonging to the electrical connection terminal 7 ( figure 1 ) for example provided with a support flange. To ensure the electrical contact between the terminal 7 and the lug 11, the flat portion 13 is clamped between the support flange and a nut screwed onto the threaded rod.

La portion tubulaire 14 s'étend longitudinalement et présente un diamètre extérieur constant sur toute sa longueur.The tubular portion 14 extends longitudinally and has a constant outside diameter throughout its length.

La portion tubulaire 14 présente en outre un chanfrein 17 (appelé aussi deuxième chanfrein) à une extrémité libre 18. Ce chanfrein 17 s'étend à partir de l'intérieur de cette portion tubulaire 14 vers un bord 19 de cette portion tubulaire 14 à son extrémité libre 18. Ce chanfrein 17 a un angle d'inclinaison par rapport à la direction longitudinale d'environ 45°.The tubular portion 14 further has a chamfer 17 (also called second chamfer) at a free end 18. This chamfer 17 extends from the inside of this tubular portion 14 to an edge 19 of this tubular portion 14 at its end. free end 18. This chamfer 17 has an angle of inclination relative to the longitudinal direction of about 45 °.

La portion de transition 15 présente un orifice 20 débouchant à l'intérieur du creux de la portion tubulaire 14. Cette fenêtre 20 est formée par une découpe de matière 21 réalisée dans la portion de transition 15. Cette découpe 21 est pliée dans le creux de la portion tubulaire 14.The transition portion 15 has a hole 20 opening into the hollow of the tubular portion 14. This window 20 is formed by a cut of material 21 made in the transition portion 15. This cutout 21 is folded in the hollow of the tubular portion 14.

La cosse 11 présente une épaisseur comprise dans un intervalle [1 mm ; 5 mm].The lug 11 has a thickness in a range [1 mm; 5 mm].

Le tube étagé 12 comporte une portion tubulaire 22 (aussi appelée troisième portion tubulaire) reliée à un épaulement 23 par une portion de transition 24 (aussi appelée première portion de transition).The stepped tube 12 comprises a tubular portion 22 (also called the third tubular portion) connected to a shoulder 23 by a transition portion 24 (also called the first transition portion).

Ce tube étagé 12 comporte en outre une autre portion tubulaire 25 (aussi appelée deuxième portion tubulaire) s'étendant dans le prolongement de l'épaulement 23.This stepped tube 12 further comprises another tubular portion 25 (also called second tubular portion) extending in the extension of the shoulder 23.

Les portions tubulaires 22 et 25 s'étendent chacune longitudinalement et présentent chacune un diamètre extérieur constant sur toute sa longueur.The tubular portions 22 and 25 each extend longitudinally and each have a constant outside diameter along its entire length.

La portion tubulaire 22 est adaptée à être insérée dans le creux de la portion tubulaire 14 de la cosse 11, avec la surface extérieure de la portion tubulaire 22 qui est adaptée à être appliquée contre la surface intérieure de la portion tubulaire 14 de la cosse 11. Pour cela, le diamètre extérieur de la portion tubulaire 22 du tube étagé 12 est inférieure au diamètre extérieur de la portion tubulaire 14 de la cosse 11 et inférieur mais presque égal au diamètre intérieur de cette même portion tubulaire 14 de sorte que le tube étagé 12 est adapté à être inséré à force dans le creux de la portion tubulaire 1.The tubular portion 22 is adapted to be inserted into the hollow of the tubular portion 14 of the lug 11, with the outer surface of the tubular portion 22 which is adapted to be applied against the inner surface of the tubular portion 14 of the lug 11 For this, the outside diameter of the tubular portion 22 of the stepped tube 12 is smaller than the outside diameter of the tubular portion 14 of the lug 11 and less but almost equal to the inside diameter of the same tubular portion 14 so that the stepped tube 12 is adapted to be inserted by force into the hollow of the tubular portion 1.

La portion de transition 24 forme un chanfrein (aussi appelé premier chanfrein) dont l'angle d'inclinaison par rapport à la direction longitudinale est environ égal à 45°. Cette portion de transition 24 est adaptée à venir en appui contre le chanfrein 17 une fois le tube étagé 12 monté avec la cosse 11.The transition portion 24 forms a chamfer (also called first chamfer) whose angle of inclination relative to the longitudinal direction is approximately equal to 45 °. This transition portion 24 is adapted to bear against the bevel 17 once the stepped tube 12 mounted with the lug 11.

L'épaulement 23 s'étend entre la portion de transition 24 et la portion tubulaire 25 transversalement par rapport à la direction longitudinale. L'angle d'inclinaison de cet épaulement 23 par rapport à la direction longitudinale est ici de 90° environ.The shoulder 23 extends between the transition portion 24 and the tubular portion 25 transversely to the longitudinal direction. The angle of inclination of this shoulder 23 with respect to the longitudinal direction is here about 90 °.

La portion tubulaire 25, comme l'épaulement 23, s'étend à l'extérieur de la cosse 11.The tubular portion 25, like the shoulder 23, extends outside the lug 11.

Le tube étagé 12 présente une épaisseur comprise dans un intervalle [0,2 mm ; 0.6 mm].The stepped tube 12 has a thickness in a range [0.2 mm; 0.6 mm].

Le câble électrique 4 comporte une âme 26 formée par plusieurs torons (non représentés) eux-mêmes formés par une pluralité de brins 27 ce qui permet au câble 4 d'être particulièrement flexible.The electric cable 4 comprises a core 26 formed by several strands (not shown) themselves formed by a plurality of strands 27 which allows the cable 4 to be particularly flexible.

Ce câble électrique 4 comporte en outre une couche semi-conductrice 28 recouvrant l'âme conductrice 26, une couche isolante 29 type silicone recouvrant la couche semi-conductrice 28, et une couche externe 30 formée par un ruban polyester recouvrant la couche isolante 29 et par une tresse de protection en tissu synthétique et vernie recouvrant ce ruban polyester.This electric cable 4 further comprises a semiconductor layer 28 covering the conductive core 26, an insulating layer 29 silicone type covering the semiconductor layer 28, and an outer layer 30 formed by a polyester tape covering the insulating layer 29 and by a protective braid in synthetic and varnished fabric covering this polyester tape.

Le câble électrique 4 présente ici un tronçon terminal 31 dénudé, autrement dit avec la couche semi-conductrice 28, la couche isolante 29 et la couche externe 30 qui ont été retirées pour ne laisser apparaître que l'âme conductrice 26.The electric cable 4 here has a stripped end portion 31, in other words with the semiconductor layer 28, the insulating layer 29 and the outer layer 30 which have been removed to reveal only the conductive core 26.

La couche semi-conductrice 28 présente une épaisseur comprise dans l'intervalle [0,1 mm ; 0,5 mm] et la couche isolante 29 est plus épaisse que la couche semi-conductrice 28.The semiconductor layer 28 has a thickness in the range [0.1 mm; 0.5 mm] and the insulating layer 29 is thicker than the semiconductor layer 28.

Ce câble 4 présente un tronçon intermédiaire 32 non dénudé dans le prolongement du tronçon terminal dénudé 31 et dans le creux de la portion tubulaire 25. La jonction entre les tronçons 31 et 32 se situe au niveau d'un bord coupé 33 de la couche semi-conductrice 28, d'un bord coupé 35 de la couche isolante 29 et d'un bord coupé 37 de la couche externe 30.This cable 4 has an intermediate section 32 not stripped in the extension of the bare end portion 31 and in the hollow of the tubular portion 25. The junction between the sections 31 and 32 is at a cut edge 33 of the semi-layer -conductor 28, a cut edge 35 of the insulating layer 29 and a cut edge 37 of the outer layer 30.

Dans le prolongement de ce tronçon intermédiaire 32 se situe un tronçon principal 36 du câble 4 qui est en dehors du tube étagé 12.In the extension of this intermediate section 32 is a main section 36 of the cable 4 which is outside the stepped tube 12.

Le tronçon terminal dénudé 31 du câble 4 est adapté à être inséré dans le creux de la portion tubulaire de la cosse 11 pour le raccordement électrique du dispositif de connexion 5 avec ce câble 4.The bare terminal section 31 of the cable 4 is adapted to be inserted into the hollow of the tubular portion of the lug 11 for the electrical connection of the connection device 5 with this cable 4.

Dans le cas d'un câble électrique 4 multi-brins 27, des espaces sont présents entre les brins 27 ce qui fait que pour une section prédéterminée de l'âme conductrice 26 de ce câble 4, il est parfois nécessaire d'utiliser une cosse 11 dont le diamètre intérieur de la portion tubulaire 14 est supérieur à la section de l'âme conductrice 26 de ce câble 4. Généralement, pour un câble électrique ayant une âme conductrice pleine, c'est-à-dire avec un seul brin, une cosse ayant une portion tubulaire avec un diamètre intérieur sensiblement égal à la section de l'âme conductrice doit être utilisée. Pour un câble multi-brins qui aurait la même section que la câble mono-brin, il est parfois nécessaire, suivant la section, d'utiliser une cosse ayant une portion tubulaire avec un diamètre intérieur qui soit supérieur.In the case of a multi-strand electric cable 27, spaces are present between the strands 27, so that for a predetermined section of the conductive core 26 of this cable 4, it is sometimes necessary to use a terminal 11 whose inner diameter of the tubular portion 14 is greater than the section of the conductive core 26 of this cable 4. Generally, for an electric cable having a solid conductive core, that is to say with a single strand, a terminal having a tubular portion with an internal diameter substantially equal to the section of the conductive core must be used. For a multi-strand cable having the same section as the single-strand cable, it is sometimes necessary, depending on the section, to use a terminal having a tubular portion with an inside diameter that is greater.

On va maintenant décrire plus en détail, toujours à l'appui des figures 2 à 5, l'assemblage de l'ensemble de liaison électrique formé par le câble 4, la cosse 11 et le tube étagé 12.We will now describe in more detail, always in support of Figures 2 to 5 , the assembly of the electrical connection assembly formed by the cable 4, the lug 11 and the stepped tube 12.

La portion tubulaire 22 du tube étagé 12 est insérée à force dans le creux de la portion tubulaire 14 de la cosse 11 jusqu'à ce que la portion de transition 24 du tube 12 vienne en appui contre la portion de transition 15 de la cosse 11. Dans cette position, la surface extérieure de l'épaulement 23 est en butée contre le bord extérieur 19 de la cosse 11.The tubular portion 22 of the stepped tube 12 is forced into the hollow of the tubular portion 14 of the lug 11 until the transition portion 24 of the tube 12 bears against the transition portion 15 of the lug 11 In this position, the outer surface of the shoulder 23 abuts against the outer edge 19 of the lug 11.

Le dispositif de connexion est ainsi assemblé, lequel dispositif a été préalablement ou pas monté sur la borne de connexion 7 via la cosse 11.The connection device is thus assembled, which device has been previously or not mounted on the connection terminal 7 via the lug 11.

Le câble 4 est ensuite partiellement inséré dans le dispositif de connexion 5.The cable 4 is then partially inserted into the connection device 5.

En particulier, le tronçon terminal dénudé 31 du câble 4 est reçu dans le creux de la portion tubulaire 14 de la cosse 11, et en même temps, dans le creux de la portion tubulaire 22 du tube 12.In particular, the stripped end section 31 of the cable 4 is received in the hollow of the tubular portion 14 of the lug 11, and at the same time in the hollow of the tubular portion 22 of the tube 12.

L'âme conductrice 26 présente une section qui est environ égale au diamètre intérieur de la portion tubulaire 22 du tube étagé 12.The conductive core 26 has a section which is approximately equal to the inside diameter of the tubular portion 22 of the stepped tube 12.

L'insertion de tous les brins 27, et en particulier des brins 27 se trouvant à la périphérie de l'âme conductrice 26 est facilitée par la portion de transition 24 du tube 12 qui forme le premier chanfrein de sorte que les brins 27 qui se trouvent à la périphérie de l'âme 26 viennent glisser contre ce chanfrein 24 jusqu'à s'introduire dans le creux de la portion tubulaire 22 du tube 12.The insertion of all the strands 27, and in particular strands 27 located at the periphery of the conductive core 26 is facilitated by the transition portion 24 of the tube 12 which forms the first chamfer so that the strands 27 which are at the periphery of the core 26 are slid against this chamfer 24 until they enter the hollow of the tubular portion 22 of the tube 12.

Le tronçon intermédiaire 32 est inséré dans le dispositif de connexion jusqu'à ce que le bord coupé 33 de la couche semi-conductrice 28, le bord coupé 35 de la couche isolante 29 et le bord coupé 37 de la couche externe 30 viennent en butée sur la surface intérieure de l'épaulement 23 du tube étagé 12, et plus particulièrement à une distance inférieure ou égale à 2 mm (visible en figure 2A).The intermediate section 32 is inserted into the connection device until the cut edge 33 of the semiconductor layer 28, the cut edge 35 of the insulating layer 29 and the cut edge 37 of the outer layer 30 abut on the inner surface of the shoulder 23 of the stepped tube 12, and more particularly at a distance of less than or equal to 2 mm (visible in Figure 2A ).

La fenêtre 20 formée dans la portion de transition 15 de la cosse 11 permet de vérifier que le câble 4 est suffisamment enfoncé à l'intérieur de la cosse 11.The window 20 formed in the transition portion 15 of the lug 11 makes it possible to verify that the cable 4 is sufficiently depressed inside lug 11.

La couche externe 30 est appliquée contre la surface intérieure de la portion tubulaire 25.The outer layer 30 is applied against the inner surface of the tubular portion 25.

Un sertissage est ensuite réalisé sur le contour de la portion tubulaire 14 de la cosse 11 de manière à sertir la cosse 11, le tube étagé 12 via sa portion tubulaire 22 et le câble électrique 4 via son tronçon terminal dénudé 31.A crimping is then performed on the contour of the tubular portion 14 of the lug 11 so as to crimp the lug 11, the stepped tube 12 via its tubular portion 22 and the electric cable 4 via its bare end portion 31.

Le sertissage est par exemple réalisé avec des empruntes de formes hexagonales de manière à réduire encore les espaces entre les brins 27 du câble 4 au niveau de son tronçon terminal dénudé 31.The crimping is for example carried out with borrows of hexagonal shapes so as to further reduce the spaces between the strands 27 of the cable 4 at its bare end portion 31.

Grâce à ce sertissage, l'ensemble de liaison électrique est formé avec le bord coupé 33 de la couche semi-conductrice 28 qui vient à proximité immédiate de la surface intérieure du tube étagé 12 ce qui permet d'annuler, ou en tout cas de limiter considérablement, les décharges électriques au niveau du tronçon terminal dénudé 31. Les perturbations électriques engendrées par l'effet de pointe auquel le câble électrique 4 multibrins 27 est particulièrement soumis (du fait des courbures le long de ce câble) sont éliminées au niveau du tronçon terminal dénudé 31.Thanks to this crimping, the electrical connection assembly is formed with the cut edge 33 of the semiconductor layer 28 which comes in close proximity to the inner surface of the stepped tube 12, which makes it possible to cancel, or in any case to The electric disturbances generated by the peak effect at which the multi-strand electrical cable 27 is particularly subjected (due to the curvatures along this cable) are eliminated considerably at the level of the bare terminal section. bare terminal section 31.

En outre, même si le câble 4, et en particulier le tronçon terminal dénudé 31 et le tronçon intermédiaire 32, vient à s'écarter de l'épaulement 23 du fait par exemple de l'allongement (naturel et/ou forcé) de ce câble 4, comme cela est illustré en figure 2, les bords coupés respectifs 33, 35 et 37 restent à une distance très faible du tube étagé 12. En effet, les bords coupés 35 et 37 ne s'éloignent que très peu de la surface intérieure de l'épaulement 23 et le bord coupé 33 est au maximum à une distance D inférieure ou égale à environ 2 mm de la surface intérieure du chanfrein 24.In addition, even if the cable 4, and in particular the bare end portion 31 and the intermediate portion 32, deviates from the shoulder 23 due for example to the elongation (natural and / or forced) of this cable 4, as illustrated in figure 2 , the respective cut edges 33, 35 and 37 remain at a very small distance from the stepped tube 12. In fact, the cut edges 35 and 37 move only a very small distance from the inner surface of the shoulder 23 and the cut edge 33 is at a distance D less than or equal to about 2 mm from the inner surface of the chamfer 24.

La figure 6 illustre un deuxième mode de réalisation du dispositif de connexion.The figure 6 illustrates a second embodiment of the connection device.

D'une manière générale on a employé pour les éléments similaires, les mêmes références mais additionnées du nombre 100.In general, for similar elements, the same references have been used but the number 100 has been added.

A la différence du dispositif de connexion 5 illustré sur les figures 2 à 5, le dispositif de connexion 105 illustré sur la figure 6 comporte une cosse 111, ici en cuivre, et un tube étagé 112, ici aussi en cuivre, lesquels cosse 11 et tube 112 sont réalisés en une seule pièce.Unlike the connection device 5 illustrated on the Figures 2 to 5 , the connection device 105 illustrated on the figure 6 comprises a lug 111, here made of copper, and a stepped tube 112, here also made of copper, which lug 11 and tube 112 are made in one piece.

A la différence du dispositif de connexion 5, le dispositif de connexion 105 présente une portion tubulaire 125 de même épaisseur que la portion tubulaire 114.Unlike the connection device 5, the connection device 105 has a tubular portion 125 of the same thickness as the tubular portion 114.

En outre, la deuxième portion de transition est confondue avec le premier chanfrein et le dispositif de connexion 105 ne présente pas de portion tubulaire 22 comme celle du dispositif de connexion 5.In addition, the second transition portion is merged with the first chamfer and the connection device 105 does not have a tubular portion 22 like that of the connection device 5.

L'insertion du câble électrique 104 dans le dispositif de connexion 105 est réalisée d'une manière semblable à l'insertion du câble électrique 4 dans le dispositif de connexion 5.The insertion of the electric cable 104 into the connection device 105 is carried out in a manner similar to the insertion of the electric cable 4 into the connection device 5.

Le bord coupé 135 de la couche isolante 129 vient en butée sur la surface intérieure de l'épaulement 123 (et peut s'en écarter très légèrement ensuite) et le bord coupé 133 de la couche semi-conductrice 128 est au maximum à une distance inférieure ou égale à environ 2 mm de la surface intérieure du chanfrein.The cut edge 135 of the insulating layer 129 abuts on the inner surface of the shoulder 123 (and may deviate very slightly thereafter) and the cut edge 133 of the semiconductor layer 128 is at most at a distance less than or equal to approximately 2 mm from the inner surface of the chamfer.

Dans des variantes non illustrées:

  • le tube étagé est réalisé dans un autre matériau que le cuivre, par exemple l'aluminium ;
  • le tube étagé présente une épaisseur comprise dans un intervalle [0,1 mm ; 1 mm] ;
  • l'épaulement du tube étagé présente un angle d'inclinaison différent de 90° par rapport à la direction longitudinale, par exemple inférieur à 90° ou supérieur à 90° tant que cet angle d'inclinaison est compris dans l'intervalle [75° ; 95°];
  • la portion tubulaire du tube étagé est introduite par glissement plutôt qu'à force dans le creux de la portion tubulaire de la cosse ;
  • la portion de transition du tube qui facilite l'insertion des brins du câble est courbée suivant un rayon ;
  • la cosse ne présente pas de fenêtre;
  • le câble électrique présente une âme conductrice pleine, c'est-à-dire avec un seul brin, plutôt que multi-brins ;
  • le câble électrique est adapté à acheminer des courants de plus de 50 kV, il est alors appelé HTB plutôt que HTA ;
  • le câble électrique comporte une structure différente, avec plus ou moins de couches et/ou avec d'autres matières ;
  • le dispositif de connexion présente en outre une gaine thermo-rétractable tubulaire montée sur le contour externe de la première portion tubulaire de la cosse et s'étend au moins jusqu'au tronçon principal du câble électrique ; et
  • le sertissage est par exemple réalisé par poinçonnage ;
In non-illustrated variants:
  • the stepped tube is made of a material other than copper, for example aluminum;
  • the stepped tube has a thickness in a range [0.1 mm; 1 mm];
  • the shoulder of the stepped tube has an angle of inclination other than 90 ° with respect to the longitudinal direction, for example less than 90 ° or greater than 90 ° as long as this angle of inclination is in the range [75 ° ; 95 °];
  • the tubular portion of the stepped tube is introduced by sliding rather than by force into the hollow of the tubular portion of the lug;
  • the transition portion of the tube which facilitates the insertion of the strands of the cable is curved along a radius;
  • the pod does not have a window;
  • the electric cable has a solid conductive core, that is to say with a single strand, rather than multi-strand;
  • the electric cable is suitable for carrying currents of more than 50 kV, it is then called HTB rather than HTA;
  • the electric cable has a different structure, with more or fewer layers and / or with other materials;
  • the connection device further has a tubular heat-shrinkable sheath mounted on the outer contour of the first tubular portion of the lug and extends at least to the main section of the electric cable; and
  • crimping is for example done by punching;

L'ensemble de liaison électrique selon l'invention est destiné à équiper plus généralement des machines à hautes tensions telles que des transformateurs, générateurs, moteurs, etc, dans l'éolien ou dans d'autres domaines, par exemple en traction.The electrical connection assembly according to the invention is intended to equip more generally high voltage machines such as transformers, generators, motors, etc., in wind power or in other areas, for example in traction.

On rappelle plus généralement que l'invention ne se limite pas aux exemples décrits et représentés.It is recalled more generally that the invention is not limited to the examples described and shown.

Claims (15)

Ensemble de liaison électrique formé par un câble électrique (4 ; 104) haute tension et un dispositif de connexion (5; 105) fixé sur un tronçon terminal dénudé (31) du câble électrique (4 ; 104), ledit câble électrique (4 ; 104) comportant une âme conductrice (26), une couche au moins partiellement conductrice (28 ; 128) recouvrant ladite âme conductrice (26) sauf sur ledit tronçon terminal dénudé (31) et une couche au moins partiellement isolante (29 ; 129) recouvrant ladite couche au moins partiellement conductrice (28 ; 128), ledit dispositif de connexion (5 ; 105) comportant une cosse (11 ; 111) formée par une portion de raccordement électrique (13) à un élément (2, 7) avec lequel ledit dispositif de connexion (5 ; 105) est configuré pour coopérer et une première portion tubulaire (14 ; 114) s'étendant longitudinalement prévue pour recevoir au moins partiellement, dans son creux, ledit tronçon terminal dénudé (31) du câble électrique (4 ; 104), caractérisé en ce que ledit dispositif de connexion (5 ; 105) comporte en outre un tube étagé (12 ; 112) ayant un épaulement transversal incliné (23 ; 123) dont l'angle d'inclinaison par rapport à ladite direction longitudinale est compris dans l'intervalle [75° ; 95°], et ladite couche au moins partiellement isolante (29 ; 129) est au moins partiellement en contact avec ledit épaulement (23 ; 123).Electrical connection assembly formed by a high voltage electrical cable (4; 104) and a connection device (5; 105) fixed on a stripped end section (31) of the electric cable (4; 104), said electric cable (4; 104) having a conductive core (26), an at least partially conductive layer (28; 128) covering said conductive core (26) except on said stripped end portion (31) and an at least partially insulating layer (29; 129) overlapping said at least partially conductive layer (28; 128), said connecting device (5; 105) having a lug (11; 111) formed by an electrical connection portion (13) to an element (2, 7) with which said connecting device (5; 105) is configured to cooperate and a first longitudinally extending tubular portion (14; 114) adapted to receive at least partially in its recess said bare terminal section (31) of the electric cable (4; 104), carac characterized in that said connecting device (5; 105) further comprises a stepped tube (12; 112) having an inclined transverse shoulder (23; 123) whose angle of inclination with respect to said longitudinal direction is in the range [75 °; 95 °], and said at least partially insulating layer (29; 129) is at least partially in contact with said shoulder (23; 123). Ensemble selon la revendication 1, caractérisé en ce que l'âme conductrice (26) du câble électrique (4 ; 104) est formée par une pluralité de brins (27).An assembly according to claim 1, characterized in that the conductive core (26) of the electric cable (4; 104) is formed by a plurality of strands (27). Ensemble selon l'une des revendications 1 et 2, caractérisé en ce que ledit tube étagé (12 ; 112) présente une deuxième portion tubulaire (25 ; 125) s'étendant longitudinalement prévue pour recouvrir un tronçon non dénudé (32) dudit câble électrique (4 ; 104).Assembly according to one of claims 1 and 2, characterized in that said stepped tube (12; 112) has a second longitudinally extending tubular portion (25; 125) provided to cover a non-stripped section (32) of said electric cable. (4; 104). Ensemble selon la revendication 3, caractérisé en ce que ladite deuxième portion tubulaire (25 ; 125) dudit tube étagé (12 ; 112) est dans le prolongement dudit épaulement (23 ; 123).Assembly according to claim 3, characterized in that said second tubular portion (25; 125) of said stepped tube (12; 112) is in the extension of said shoulder (23; 123). Ensemble selon l'une des revendications 3 et 4, caractérisé en ce que ladite deuxième portion tubulaire (25 ; 125) dudit tube étagé (12 ; 112) présente un diamètre extérieur supérieur au diamètre extérieur de ladite première portion tubulaire (14 ; 114).An assembly according to one of claims 3 and 4, characterized in that said second tubular portion (25; 125) of said stepped tube (12; 112) has an outside diameter greater than the outside diameter of said first tubular portion (14; 114) . Ensemble selon l'une quelconque des revendications 1 à 5, caractérisé en ce que ledit tube étagé (12 ; 112) présente une première portion de transition (24) formant un premier chanfrein pour l'insertion de l'âme (26) dudit câble électrique (4 ; 104) dans ledit creux de ladite première portion tubulaire (14; 114).An assembly according to any one of claims 1 to 5, characterized in that said stepped tube (12; 112) has a first transition portion (24) forming a first chamfer for insertion of the core (26) of said cable electric (4; 104) in said recess of said first tubular portion (14; 114). Ensemble selon la revendication 6, caractérisé en ce que ladite première portion de transition (24) est dans le prolongement dudit épaulement (23 ; 123).Assembly according to claim 6, characterized in that said first transition portion (24) is in the extension of said shoulder (23; 123). Ensemble selon l'une quelconque des revendications 1 à 7, caractérisé en ce que ladite cosse (11 ; 111) présente une deuxième portion de transition (15) reliant ladite portion de raccordement électrique (13) à ladite première portion tubulaire (14 ; 114), laquelle deuxième portion de transition (15) est pourvue d'un orifice (20) débouchant à l'intérieur dudit creux de ladite première portion tubulaire (14 ; 114).An assembly according to any one of claims 1 to 7, characterized in that said lug (11; 111) has a second transition portion (15) connecting said electrical connection portion (13) to said first tubular portion (14; ), which second transition portion (15) is provided with an orifice (20) opening into said hollow of said first tubular portion (14; 114). Ensemble selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ledit tube étagé (112) et ladite cosse (111) sont en une seule pièce.Assembly according to any one of claims 1 to 8, characterized in that said stepped tube (112) and said lug (111) are in one piece. Ensemble selon l'une quelconque des revendications 1 à 8, caractérisé en ce que ledit tube étagé (12) et ladite cosse (11) sont distincts.Assembly according to any one of claims 1 to 8, characterized in that said stepped tube (12) and said lug (11) are distinct. Ensemble selon la revendication 10, caractérisé en ce que ledit tube étagé (12) présente une troisième portion tubulaire (22) configurée pour être disposée au moins partiellement à l'intérieur de la première portion tubulaire (14) de ladite cosse (11).An assembly according to claim 10, characterized in that said stepped tube (12) has a third tubular portion (22) configured to be disposed at least partially within the first tubular portion (14) of said lug (11). Ensemble selon la revendication 11, caractérisé en ce que ladite troisième portion tubulaire (22) présente un diamètre intérieur environ égal à la section de ladite âme conductrice (26) dudit câble électrique (4).Assembly according to claim 11, characterized in that said third tubular portion (22) has an inner diameter approximately equal to the section of said conductive core (26) of said electric cable (4). Ensemble selon l'une des revendications 11 et 12, caractérisé en ce que ladite troisième portion tubulaire (22) présente une épaisseur réduite par rapport à l'épaisseur de ladite première portion tubulaire (14).Assembly according to one of claims 11 and 12, characterized in that said third tubular portion (22) has a reduced thickness relative to the thickness of said first tubular portion (14). Ensemble selon l'une quelconque des revendications 11 à 13 et selon la revendication 6, caractérisé en ce que ladite deuxième portion tubulaire (28) est reliée à ladite troisième portion tubulaire (22) par ladite première portion de transition (24).Assembly according to any one of claims 11 to 13 and according to claim 6, characterized in that said second tubular portion (28) is connected to said third tubular portion (22) by said first transition portion (24). Ensemble selon la revendication 14, caractérisé en ce que ladite première portion tubulaire (14) de ladite cosse (11) présente un deuxième chanfrein (17) à une extrémité libre (18), deuxième chanfrein (17) contre lequel est disposée ladite première portion de transition (24) dudit tube étagé (12).Assembly according to claim 14, characterized in that said first tubular portion (14) of said lug (11) has a second chamfer (17) at one free end (18), second chamfer (17) against which said first portion is disposed transition (24) of said stepped tube (12).
EP11190232A 2010-11-25 2011-11-23 Bonding assembly made up of a high-voltage power cable and a connection device Withdrawn EP2458687A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1059736A FR2968138B1 (en) 2010-11-25 2010-11-25 ELECTRICAL CONNECTION ASSEMBLY FORMED BY HIGH VOLTAGE ELECTRIC CABLE AND CONNECTING DEVICE

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EP2458687A1 true EP2458687A1 (en) 2012-05-30

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FR2968138A1 (en) 2012-06-01

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