EP0732768B1 - Process for making an electrical connection to a metallic screen of a power cable and ring for carrying out the process - Google Patents
Process for making an electrical connection to a metallic screen of a power cable and ring for carrying out the process Download PDFInfo
- Publication number
- EP0732768B1 EP0732768B1 EP19960400500 EP96400500A EP0732768B1 EP 0732768 B1 EP0732768 B1 EP 0732768B1 EP 19960400500 EP19960400500 EP 19960400500 EP 96400500 A EP96400500 A EP 96400500A EP 0732768 B1 EP0732768 B1 EP 0732768B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- cable
- screen
- covering
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- 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
- H01R4/58—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 characterised by the form or material of the contacting members
- H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
- H01R4/646—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail for cables or flexible cylindrical bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
- H01R9/0512—Connections to an additional grounding conductor
Definitions
- the present invention relates to a ring and a process for establishing an electrical connection with a screen metal of an energy cable.
- the power cable is a power cable high voltage or a very high voltage power cable.
- the electrical connection resulting from the implementation of the process according to the invention is provided or for a setting earth of the metallic screen of the power cable, or else a connection between metal screens in the case of a junction established between two respective ends of cables.
- an energy cable 1 typically includes a central conductive element 10 covered by envelopes, sheath or screen, forming successive layers in view radial.
- the conductive element 10 is surrounded by a screen semiconductor 11.
- This semiconductor screen 11 is itself even covered by an inner insulating sheath 12 which is surrounded by a metallic screen 13, this metallic screen 13 being covered by and possibly attached to a sheath external insulation 14.
- other structures of power cable exist according to the prior art, which include semiconductor screen (s) and / or sheath (s) additional insulation (s). It should only be retained for understanding the invention that an energy cable further includes a metal screen, called a shield, 13 which is placed between two envelopes 12 and 14 respectively interior and exterior.
- the request for European patent EP-A-0 549 942 provides for the use of a metal plate which is arched to take shape a cylindrical ring open longitudinally.
- the figure 2 shows such a ring 2 according to the prior art.
- a connecting element 21 intended to support the connection with a box earthing or other connection element in the case of a junction between two respective ends of two cables.
- This connection element 21 can take the shape of a leg, as shown in the figure 2, but can also consist of a screw or even a braid of conductive tape.
- the arched plate, or ring, 20 may have a smooth outer surface, but has preferably projecting pins 200 formed on at least one part of its outer surface, which gives it the appearance of a "cheese grater".
- Such a ring according to FIG. 2 is used from the as follows in the prior art. Incisions longitudinal are formed in the insulating sheath exterior 14 so as to favor the introduction of the ring between the inner casing 12 and the metal screen driver 13. This operation is facilitated by the fact that the metal screen 13 is fixed, typically by gluing, to the outer casing, or insulating sheath 14.
- the arched plate has protruding pins formed on at least part of its outer surface, these protruding pins penetrate superficially in the metallic screen to guarantee a good fixing of the plate 2 between the insulating envelope interior 12 and the metal screen 13.
- the plate 2 having conductive properties, then constitutes a electrical connection element between the metal screen 13 and a given connection point, through the element of connection 21.
- said ring open lengthwise is as such adaptable the expansion phenomena of the cable in service and particular of the material of the inner envelope.
- this ring is usually kept tight in place and then leads to significant efforts between it and the inner casing, especially when the cable is at very high tension.
- the present invention aims to remedy the drawbacks of the aforementioned connecting device, in particular to the problems due to the phenomena of expansion of the inner envelope of the cable.
- a connecting device electric including an energy cable and a ring establishing said connection with a metal screen of said cable, said screen being situated between an envelope inner insulation and an outer insulating envelope of said cable, said ring being metallic, disposed between said inner envelope and said screen, along a portion of said cable, and associated with clamping means and comprising a connecting element fixed on it, characterized in that said ring is formed of a section of tube closed on itself and substantially non-deformable with a diameter inside significantly greater than the outside diameter of said inner envelope, said inner diameter of said tube section being provided sufficient to allow a expansion of said cable without generating mechanical forces high between said cable and said ring.
- the ring has protruding pins which are formed on at least part of the surface of said tube section.
- the ring can be associated with the minus a hose clamp.
- a method for establishing a electrical connection with a metal screen arranged between a outer shell and an inner shell forming part an energy cable comprising the step of introducing a ring between the inner casing and the metal screen, along a first portion of said cable, is characterized in that said ring is as defined above and in what said introductory step is preceded by a step of machining said outer casing, along a second portion of said cable which includes said first portion and extends substantially beyond this first portion, so as to reduce the thickness of said outer envelope without making it void, in part outer shell with reduced thickness.
- a ring 3 differs from the prior art in that that it is in the form of a closed tube section 30.
- a this section of tube 30 is fixed, for example by welding, a connecting element 21 intended to serve as a support for the connection with a grounding box or with a other connection element in the case of a junction between two respective ends of two cables.
- This connection element 21 can take the form of a lug but it can also consist of a screw or even a braid of conductive tape.
- Ring 3 can have a smooth outer surface, but preferably has 200 protruding pins formed on at least part of its outer surface, which gives it the appearance of a "grater cheese”.
- the cable is first stripped at its end of the screens metallic 13 and outer insulating jacket 14, so to let appear a segment S of insulating envelope interior 12 stripped.
- segment S of the stripped inner envelope 12 constitutes a end of the first portion p of the cable 1 along which the ring is to be introduced between the envelope 12 and screen 13.
- This machining has the result of reducing the thickness of the outer insulating envelope 14 without making it zero, in a portion of outer casing with reduced thickness. Extraction of material from the outer insulating envelope 14 along the second portion P of the cable 1 is represented by the reference 50 in FIG. 4.
- this single machining operation is implemented work prior to the introduction of the tube section 30 of the ring 3 between the inner insulating envelope 12 and metal screen 13. Machining, reducing the thickness of the outer insulating envelope 14, allows the introduction of ring 3. It should be noted that the thickness of the envelope outer insulator 14 along the cable portion P after the machining operation is not zero so that guarantee good electrical protection of the screen metallic 13.
- the machining operation is planned to incise longitudinally, along the length of cable 1, the part outer shell with reduced thickness and the screen cylindrical metal which is arranged below, for form tabs 60, 61 and 62.
- Incisions 40 and 41 are designated by the references 40 and 41 in the part of Figure 3 which is located on the left of the ring 2 and which is shown in cross section.
- the section of tube 30 forming part of the ring 3 is introduced under the tabs thus formed, along the first portion denoted p of cable 1.
- the tabs formed by incision are tightened on the outer surface of the tube section 30 of the ring 3.
- the part of the tube section 30 of the ring 3 which is introduced under the tabs formed by incision includes pins 200 projections which are formed on its surface.
- the section of tube 30 of ring 3 has an inside diameter significantly greater than the outside diameter of the envelope interior 12, leaving a space between the surface inner of the ring and the outer surface of the inner envelope. This gap, or space, between the outer diameter of the inner casing 12 and the inside diameter of the tube section 30 of the ring 3 is noted ⁇ .
- This difference in diameter is intended to allow a cable 1 expansion without generating mechanical forces high between cable 1 and ring 3. Such an expansion results from high heating of cable 1 which originates a large electric current carried in the cable 1.
- the maintenance of a small thickness of the outer insulating envelope 14 for each of the tabs 60, 61, 62, along the portion of cable P allows bending without breaking of each metal screen portion forming part of one respective of these tabs, when the tube section 30 of ring 3 is inserted between the insulating jacket interior 12 and the metal screen 13.
- the connecting element 21 of the ring although shown in the form of a tab in Figure 3, can also consist for example of a screw or in a braid of conductive tape.
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Description
La présente invention concerne une bague ainsi qu'un procédé pour établir une liaison électrique avec un écran métallique d'un câble d'énergie.The present invention relates to a ring and a process for establishing an electrical connection with a screen metal of an energy cable.
Typiquement, le câble d'énergie est un câble d'énergie haute tension ou un câble d'énergie très haute tension. La liaison électrique résultant de la mise en oeuvre du procédé selon l'invention est prévue ou bien pour une mise à la terre de l'écran métallique du câble d'énergie, ou bien pour une connexion entre écrans métalliques dans le cas d'une jonction établie entre deux extrémités respectives de câbles.Typically, the power cable is a power cable high voltage or a very high voltage power cable. The electrical connection resulting from the implementation of the process according to the invention is provided or for a setting earth of the metallic screen of the power cable, or else a connection between metal screens in the case of a junction established between two respective ends of cables.
En référence à la figure 1, un câble d'énergie 1, de
forme sensiblement cylindrique, comprend typiquement un
élément conducteur central 10 recouvert par des enveloppes,
gaine ou écran, formant des couches successives en vue
radiale. L'élément conducteur 10 est enveloppé par un écran
semi-conducteur 11. Cet écran semi-conducteur 11 est lui
même recouvert par une gaine isolante intérieure 12 qui est
entourée par un écran métallique 13, cet écran métallique 13
étant recouvert par et éventuellement fixé à une gaine
isolante extérieure 14. En pratique, d'autres structures de
câble d'énergie existent selon la technique antérieure, qui
comprennent des écran(s) semi-conducteur(s) et/ou gaine(s)
isolante(s) additionnelle(s). Il doit seulement être retenu
pour la compréhension de l'invention qu'un câble d'énergie
comprend, en outre, un écran métallique, dit de blindage, 13
qui est disposé entre deux enveloppes 12 et 14
respectivement intérieure et extérieure.With reference to FIG. 1, an
Pour une mise à la terre de l'écran métallique 13 d'un
câble d'énergie 1 ou l'établissement d'une connexion entre
écrans métalliques dans le cas d'une jonction établie entre
deux extrémités respectives de deux câbles, la demande de
brevet européen EP-A-0 549 942 prévoit l'utilisation d'une
plaquette de métal qui est arquée pour prendre la forme
d'une bague cylindrique ouverte longitudinalement. La figure
2 montre une telle bague 2 selon la technique antérieure. A
la bague 2, sous la forme d'une plaquette arquée 20, est
fixé, par exemple par soudage, un élément de raccordement 21
destiné à servir de support à la connexion avec un boítier
de mise à la terre ou avec un autre élément de raccordement
dans le cas d'une jonction entre deux extrémités respectives
de deux câbles. Cet élément de raccordement 21 peut prendre
la forme d'une patte, telle que représentée dans la figure
2, mais peut également consister en une vis ou encore en une
tresse de ruban conducteur. La plaquette arquée, ou bague,
20 peut avoir une surface extérieure lisse, mais comporte de
préférence des picots saillants 200 formés sur au moins une
partie de sa surface extérieure, qui lui donne l'aspect
d'une "râpe à fromage".For a grounding of the
Une telle bague selon la figure 2 est utilisée de la
façon suivante dans le technique antérieure. Des incisions
longitudinales sont formées dans la gaine isolante
extérieure 14 de sorte à favoriser l'introduction de la
bague entre l'enveloppe intérieure 12 et l'écran métallique
conducteur 13. Cette opération est facilitée par le fait que
l'écran métallique 13 est fixé, typiquement par collage, à
l'enveloppe, ou gaine isolante, extérieure 14. Dans la
variante selon laquelle la plaquette arquée comporte des
picots saillants formés sur au moins une partie de sa
surface extérieure, ces picots saillants viennent pénétrer
superficiellement dans l'écran métallique pour garantir une
bonne fixation de la plaquette 2 entre l'enveloppe isolante
intérieure 12 et l'écran métallique 13. La plaquette 2,
ayant des propriétés conductrices, constitue alors un
élément de liaison électrique entre l'écran métallique 13 et
un point de connexion donné, à travers l'élément de
raccordement 21. Such a ring according to FIG. 2 is used from the
as follows in the prior art. Incisions
longitudinal are formed in the insulating
Dans un dispositif de liaison électrique, qui comprend le câble de la figure 1 et la bague de la figure 2 alors montée en place entre l'enveloppe intérieure et l'écran du câble, pour l'établissement de ladite liaison avec l'écran de ce câble, ladite bague ouverte en long est en tant que telle adaptable aux phénomènes d'expansion du câble en service et en particulier du matériau de l'enveloppe intérieure. Cependant cette bague est d'une manière habituelle maintenue serrée en place et conduit alors à des efforts importants entre elle et l'enveloppe intérieure, notamment quand le câble est à très haute tension.In an electrical connection device, which comprises the cable of Figure 1 and the ring of Figure 2 then mounted in place between the inner casing and the cable screen, to the establishment of said connection with the screen of this cable, said ring open lengthwise is as such adaptable the expansion phenomena of the cable in service and particular of the material of the inner envelope. However this ring is usually kept tight in place and then leads to significant efforts between it and the inner casing, especially when the cable is at very high tension.
Par ailleurs la mise en place de la bague précitée sous l'écran est difficile dès lors que l'enveloppe extérieure qui entoure cet écran possède une épaisseur élevée et donc peu de souplesse.Furthermore, the placement of the aforementioned ring under the screen is difficult when the outer envelope which surrounds this screen has a high thickness and therefore little flexibility.
La présente invention vise à remédier aux inconvénients du dispositif de liaison précité, en particulier aux problèmes dus aux phénomènes d'expansion de l'enveloppe intérieure du câble.The present invention aims to remedy the drawbacks of the aforementioned connecting device, in particular to the problems due to the phenomena of expansion of the inner envelope of the cable.
Elle a donc pour objet un dispositif de liaison électrique comprenant un câble d'énergie et une bague d'établissement de ladite liaison avec un écran métallique dudit câble, ledit écran étant situé entre une enveloppe isolante intérieure et une enveloppe isolante extérieure dudit câble, ladite bague étant métallique, disposée entre ladite enveloppe intérieure et ledit écran, le long d'une portion dudit câble, et associée à des moyens de serrage et comportant un élément de raccordement fixé sur elle, caractérisé en ce que ladite bague est formée d'un tronçon de tube fermé sur lui-même et substantiellement non déformable possédant un diamètre intérieur sensiblement supérieur au diamètre extérieur de ladite enveloppe intérieure, ledit diamètre intérieur dudit tronçon de tube étant prévu suffisant pour permettre une expansion dudit câble sans engendrer des efforts mécaniques élevés entre ledit câble et ladite bague.It therefore relates to a connecting device electric including an energy cable and a ring establishing said connection with a metal screen of said cable, said screen being situated between an envelope inner insulation and an outer insulating envelope of said cable, said ring being metallic, disposed between said inner envelope and said screen, along a portion of said cable, and associated with clamping means and comprising a connecting element fixed on it, characterized in that said ring is formed of a section of tube closed on itself and substantially non-deformable with a diameter inside significantly greater than the outside diameter of said inner envelope, said inner diameter of said tube section being provided sufficient to allow a expansion of said cable without generating mechanical forces high between said cable and said ring.
Avantageusement, la bague possède des picots saillants qui sont formés sur au moins une partie de la surface dudit trcnçon de tube. En outre, la bague peut être associée à au moins un collier de serrage.Advantageously, the ring has protruding pins which are formed on at least part of the surface of said tube section. In addition, the ring can be associated with the minus a hose clamp.
Selon l'invention également, un procédé pour établir une liaison électrique avec un écran métallique disposé entre une enveloppe extérieure et une enveloppe intérieure formant partie d'un câble d'énergie, comprenant l'étape d'introduction d'une bague entre l'enveloppe intérieure et l'écran métallique, le long d'une première portion dudit câble, est caractérisé en ce que ladite bague est telle que définie ci-dessus et en ce que ladite étape d'introduction est précédée par une étape d'usinage de ladite enveloppe extérieure, le long d'une seconde portion dudit câble qui comprend ladite première portion et s'étend sensiblement au delà de cette première portion, de sorte à diminuer l'épaisseur de ladite enveloppe extérieure sans la rendre nulle, en une partie d'enveloppe extérieure à épaisseur réduite.According to the invention also, a method for establishing a electrical connection with a metal screen arranged between a outer shell and an inner shell forming part an energy cable, comprising the step of introducing a ring between the inner casing and the metal screen, along a first portion of said cable, is characterized in that said ring is as defined above and in what said introductory step is preceded by a step of machining said outer casing, along a second portion of said cable which includes said first portion and extends substantially beyond this first portion, so as to reduce the thickness of said outer envelope without making it void, in part outer shell with reduced thickness.
Par ailleurs, le procédé peut comprendre postérieurement à l'étape d'usinage et antérieurement à l'étape d'introduction, l'étape de:
- incision longitudinale de ladite partie d'enveloppe extérieure à épaisseur réduite et dudit écran métallique qui est disposé en dessous, pour former des languettes en dessous desquelles est introduite ladite bague, et
- serrage sur la surface extérieure de ladite bague, au moyen dudit collier, desdits languettes formées par incision.
- longitudinal incision of said reduced thickness outer shell part and of said metal screen which is arranged below, to form tongues below which said ring is inserted, and
- tightening on the outer surface of said ring, by means of said collar, said tabs formed by incision.
D'autres caractéristiques et avantages de la présente invention apparaítront plus clairement à la lecture de la description suivante, en référence aux dessins annexés correspondants, dans lesquels :
- la figure 1 montre une vue en coupe transversale d'un tronçon de câble d'énergie selon la technique connue;
- la figure 2, montre une vue en perspective d'une bague selon la technique antérieure pour établir une liaison électrique avec un écran métallique d'un câble d'énergie;
- la figure 3 représente une bague selon l'invention pour établir une liaison électrique avec un écran métallique d'un câble d'énergie à très haute tension; et
- la figure 4 montre, un câble d'énergie recevant une bague du type montré à la figure 3 pour expliquer le procédé selon l'invention, seule une partie de la figure située à gauche de la bague étant représentée en coupe transversale.
- Figure 1 shows a cross-sectional view of a section of power cable according to the known technique;
- Figure 2 shows a perspective view of a ring according to the prior art for establishing an electrical connection with a metal screen of an energy cable;
- FIG. 3 represents a ring according to the invention for establishing an electrical connection with a metal screen of a very high voltage power cable; and
- Figure 4 shows, an energy cable receiving a ring of the type shown in Figure 3 to explain the method according to the invention, only part of the figure to the left of the ring being shown in cross section.
En référence à la figure 3, une bague 3 selon
l'invention se distingue de la technique antérieure en ce
qu'elle est sous la forme d'un tronçon de tube fermé 30. A
ce tronçon de tube 30 est fixé, par exemple par soudage, un
élément de raccordement 21 destiné à servir de support à la
connexion avec un boítier de mise à la terre ou avec un
autre élément de raccordement dans le cas d'une jonction
entre deux extrémités respectives de deux câbles. Cet
élément de raccordement 21 peut prendre la forme d'une patte
mais il peut également consister en une vis ou encore en une
tresse de ruban conducteur. La bague 3 peut avoir une
surface extérieure lisse, mais comporte de préférence des
picots saillants 200 formés sur au moins une partie de sa
surface extérieure, qui lui donne l'aspect d'une "râpe à
fromage".With reference to FIG. 3, a
En référence à la figure 4, il est maintenant présenté
le procédé selon l'invention. Il est supposé dans la
description qui suit que la bague 3 est à introduire entre
l'enveloppe isolante 12 intérieure à l'écran métallique 13
et cet écran métallique 13, le long d'une première portion,
notée p, du câble 1.Referring to Figure 4, it is now presented
the method according to the invention. It is assumed in the
description which follows that the
Comme représenté à droite dans la figure 4, le câble
est tout d'abord dépouillé à son extrémité des écran
métallique 13 et enveloppe isolante extérieure 14, de sorte
à laisser apparaítre un segment S d'enveloppe isolante
intérieure 12 dénudée. L'une A des deux extrémités de ce
segment S d'enveloppe intérieure 12 dénudée constitue une
extrémité de la première portion p du câble 1 le long de
laquelle la bague est à introduire entre l'enveloppe 12 et
l'écran 13. Il est ensuite procédé à un usinage de
l'enveloppe isolante extérieure 14, le long d'une seconde
portion P du câble 1 qui comprend ladite première portion p
et s'étend sensiblement au delà de cette première portion p.
Cet usinage a pour résultat de diminuer l'épaisseur de
l'enveloppe isolante extérieure 14 sans la rendre nulle, en
une partie d'enveloppe extérieure à épaisseur réduite.
L'extraction de matière de l'enveloppe isolante extérieure
14 le long de la seconde portion P du câble 1 est
représentée par la référence 50 dans la figure 4.As shown on the right in figure 4, the cable
is first stripped at its end of the screens
metallic 13 and outer insulating
Selon une première variante du procédé selon
l'invention, cette seule opération d'usinage est mise en
oeuvre préalablement à l'introduction du tronçon de tube 30
de la bague 3 entre l'enveloppe isolante intérieure 12 et
l'écran métallique 13. L'usinage, diminuant l'épaisseur de
l'enveloppe isolante extérieure 14, permet l'introduction de
la bague 3. Il est à noter que l'épaisseur de l'enveloppe
isolante extérieure 14 le long de la portion de câble P
après l'opération d'usinage n'est pas nulle de sorte à
garantir une bonne protection électrique de l'écran
métallique 13.According to a first variant of the method according to
the invention, this single machining operation is implemented
work prior to the introduction of the
Avantageusement, selon une seconde variante, après
l'opération d'usinage il est prévu d'inciser
longitudinalement, suivant la longueur du câble 1, la partie
d'enveloppe extérieure à épaisseur réduite et l'écran
métallique cylindrique qui est disposé en dessous, pour
former des languettes 60, 61 et 62. Des incisions
longitudinales 40 et 41 sont désignées par les références 40
et 41 dans la partie de la figure 3 qui est située à gauche
de la bague 2 et qui est représentée en coupe transversale.
Ensuite, le tronçon de tube 30 formant partie de la bague 3
est introduit sous les languettes ainsi formées, le long de
la première portion notée p du câble 1. Après avoir ainsi
introduit le tronçon de tube 30 de la bague 3 entre
l'enveloppe isolante intérieure 12 et l'écran métallique 13,
les languettes formées par incision sont serrées sur la
surface extérieure du tronçon de tube 30 de la bague 3. Pour
ce serrage, il est prévu d'utiliser à titre d'exemple au
moins un collier de serrage 31, 32. De préférence, la partie
du tronçon de tube 30 de la bague 3 qui est introduite sous
les languettes formées par incision comprend des picots
saillants 200 qui sont formés sur sa surface. Selon une
caractéristique très importante de l'invention, le tronçon
de tube 30 de la bague 3 possède un diamètre intérieur
sensiblement supérieur au diamètre extérieur de l'enveloppe
intérieure 12, en laissant un espace entre la surface
intérieure de la bague et la surface extérieure de
l'enveloppe intérieure. Cet écart, ou espace, entre le
diamètre extérieur de l'enveloppe intérieure 12 et le
diamètre intérieur du tronçon de tube 30 de la bague 3 est
noté δ. Cet écart de diamètre est destiné à permettre une
expansion du câble 1 sans engendrer des efforts mécaniques
élevés entre le câble 1 et la bague 3. Une telle expansion
résulte d'un chauffage élevé du câble 1 qui a pour origine
une grande intensité électrique véhiculée dans le câble 1.Advantageously, according to a second variant, after
the machining operation is planned to incise
longitudinally, along the length of
Il est à noter que selon cette variante, le maintien
d'une faible épaisseur de l'enveloppe isolante extérieure 14
pour chacune des languettes 60, 61, 62, le long de la
portion de câble P, autorise une flexion sans rupture de
chaque portion d'écran métallique formant partie de l'une
respective de ces languettes, lorsque le tronçon de tube 30
de la bague 3 est introduit entre l'enveloppe isolante
intérieure 12 et l'écran métallique 13.It should be noted that according to this variant, the maintenance
of a small thickness of the outer insulating
L'élément de raccordement 21 de la bague, bien que
représenté sous la forme d'une patte dans la figure 3, peut
également consister à titre d'exemple en une vis ou encore
en une tresse de ruban conducteur.The connecting
Claims (5)
- An electrical link device comprising a power cable (1) and a ring (3) for establishing said link with a metal screen (13) of said cable, said screen being situated between an inner insulating covering (12) and an outer insulating covering (14) of said cable, said ring being made of metal, being disposed between said inner covering (12) and said screen (13), along a portion (p) of said cable, being associated with clamping means (31, 32), and including a connection element (21) fixed thereto, the device being characterized in that said ring (3) is constituted by a closed segment of tube (30) that is substantially undeformable, having an inside diameter perceptibly greater than the outside diameter of said inner covering (12), said inside diameter of said segment of tube (30) being designed to be large enough to allow said cable to expand without giving rise to high levels of mechanical force between said cable (1) and said ring (3).
- A device according to claim 1, characterized in that said segment of tube (30) has projecting spikes (200) formed on at least a portion of the outside surface of said tube.
- A device according to claim 1 or 2, characterized in that said clamping means (31, 32) comprise at least one clamping collar for clamping the outer covering (14) onto said screen (13) and said segment of tube (30).
- A method of establishing an electrical link with a metal screen (13) disposed between an outer covering (14) and an inner covering (12) forming portions of a power cable (1), the method comprising the step of inserting a ring (3) between said inner covering (12) and said metal screen (13) along a first portion (p) of said cable (1), the method being characterized in that said insertion step is preceded by a step of machining said outer covering (14) along a second portion (P) of said cable (1) which includes said first portion (p) and which extends well beyond said first portion (p) so as to reduce the thickness of said outer covering (14) without reducing it to zero in a reduced-thickness portion of the outer covering.
- A method according to claim 4, when said ring is as defined in claim 3, the method being characterized in that it comprises:
after the machining step and before the insertion step, a step of:after the insertion step, a step of:cutting (40, 41) said reduced-thickness portion of the outer covering (14) and said metal screen (13) underlying it longitudinally so as to form tongues (60, 61, 62) beneath which said ring (3) is inserted; andusing said collar (31, 32) to clamp said tongues (60, 61, 62) formed by the longitudinal cuts onto the outside surface of said ring (3).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9503000 | 1995-03-15 | ||
| FR9503000A FR2731849B1 (en) | 1995-03-15 | 1995-03-15 | PROCESS FOR ESTABLISHING AN ELECTRICAL CONNECTION WITH A METAL SCREEN OF AN ENERGY CABLE AND RING FOR IMPLEMENTING THE PROCESS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0732768A1 EP0732768A1 (en) | 1996-09-18 |
| EP0732768B1 true EP0732768B1 (en) | 1999-10-13 |
Family
ID=9477046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19960400500 Expired - Lifetime EP0732768B1 (en) | 1995-03-15 | 1996-03-11 | Process for making an electrical connection to a metallic screen of a power cable and ring for carrying out the process |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0732768B1 (en) |
| DE (1) | DE69604608T2 (en) |
| FR (1) | FR2731849B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005036699A1 (en) * | 2003-09-16 | 2005-04-21 | Daume Patentbesitzgesellschaft Mbh | Device for electroconductively contacting a partially skinned outer conductor of a coaxial cable |
| AU2009356466B2 (en) * | 2009-12-10 | 2015-09-24 | Prysmian S.P.A. | Biasing connector |
| EP2894728B1 (en) * | 2014-01-13 | 2020-04-15 | Tyco Electronics Raychem GmbH | Shielding connector and method and tool for installing a shielding connector |
| FR3046303B1 (en) * | 2015-12-23 | 2018-02-16 | Nexans | CURRENT COLLECTOR DEVICE FOR CABLE SCREEN, IN PARTICULAR HTA CABLE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2798113A (en) * | 1954-03-29 | 1957-07-02 | Bell Telephone Labor Inc | Shield connectors |
| US3315024A (en) * | 1964-11-19 | 1967-04-18 | Thomas & Betts Corp | Grounding sheath connector |
| US3897127A (en) * | 1974-03-08 | 1975-07-29 | Thomas & Betts Corp | Means for grounding a shielded cable |
| FR2685141A1 (en) * | 1991-12-17 | 1993-06-18 | Euromold | JUNCTION OF ELECTRIC CABLES, PREFERRED JUNCTION ASSEMBLY AND METHOD FOR IMPLEMENTING THE SAME. |
-
1995
- 1995-03-15 FR FR9503000A patent/FR2731849B1/en not_active Expired - Lifetime
-
1996
- 1996-03-11 DE DE1996604608 patent/DE69604608T2/en not_active Expired - Lifetime
- 1996-03-11 EP EP19960400500 patent/EP0732768B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| FR2731849B1 (en) | 1997-04-30 |
| FR2731849A1 (en) | 1996-09-20 |
| DE69604608D1 (en) | 1999-11-18 |
| DE69604608T2 (en) | 2000-05-31 |
| EP0732768A1 (en) | 1996-09-18 |
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