EP3490074B1 - Agencement permettant de mettre en contact un blindage d'un câble - Google Patents

Agencement permettant de mettre en contact un blindage d'un câble Download PDF

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Publication number
EP3490074B1
EP3490074B1 EP17306618.4A EP17306618A EP3490074B1 EP 3490074 B1 EP3490074 B1 EP 3490074B1 EP 17306618 A EP17306618 A EP 17306618A EP 3490074 B1 EP3490074 B1 EP 3490074B1
Authority
EP
European Patent Office
Prior art keywords
cable
contact element
shield
arrangement
contact
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.)
Active
Application number
EP17306618.4A
Other languages
German (de)
English (en)
Other versions
EP3490074A1 (fr
Inventor
Johannes KRÖNERT
Jörg GERLITZ
Gert Stauch
Manfred BÄSCH
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.)
Nexans SA
Original Assignee
Nexans SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nexans SA filed Critical Nexans SA
Priority to EP17306618.4A priority Critical patent/EP3490074B1/fr
Publication of EP3490074A1 publication Critical patent/EP3490074A1/fr
Application granted granted Critical
Publication of EP3490074B1 publication Critical patent/EP3490074B1/fr
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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
    • 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
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • 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
    • H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding  
    • H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
    • H01R13/6591—Specific features or arrangements of connection of shield to conductive members
    • H01R13/6592—Specific features or arrangements of connection of shield to conductive members the conductive member being a shielded cable
    • 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
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw

Definitions

  • the invention relates to an arrangement for contacting a screen of a cable, in particular a high-voltage cable, as well as a screen connection with such an arrangement and a method for producing a screen connection.
  • High-voltage cables generally have an inner cable core and a screen which is separated from the cable core by an insulating layer and which is generally earthed.
  • the shields are usually formed by an aluminum foil closed in a tubular shape around the cable core or by a large number of wires made of copper and increasingly of aluminum.
  • cables are considered whose shields are formed in particular from a tubular aluminum foil closed around the cable core.
  • the shield is conventionally connected by means of electric welding. This requires a considerable amount of know-how on the part of the assembly staff and a considerable outlay in terms of equipment technology in order to ensure a reliable current-carrying connection without undue stress on the shield and the insulation of the cable. In addition, there is always an increased risk of fire during welding work.
  • a contacting device for contacting a cable shield has two ring-shaped contact elements, one of which has a conical outer surface and the other has an opposing conical inner surface, between which a cable shield of a cable, in particular a high-voltage cable is contactable.
  • the contact elements are clamped together by clamping screws and in this way produce an electrically conductive contact with the cable shield
  • a first object of the present invention is to create a further improved arrangement for contacting a screen or cable screen, as well as a corresponding screen connection and its production.
  • the invention proposes, according to a first aspect, an arrangement for contacting an electrical shield of a cable according to claim 1.
  • This design has the advantage that relatively little installation space is required in relation to the conductor cross-section. In addition, it is possible to run the further cable parallel to the cable whose screen is contacted, which also has a favorable effect on the installation space required.
  • the contact elements are cylindrical and each have a cylinder jacket.
  • the arrangement additionally has a protective tube which extends over the cable and in this way can protect against external damage.
  • the protective tube has a receptacle for a further cable.
  • the receptacle is set up to produce an electrically conductive connection to the further cable.
  • the receptacle enables the screen to be advantageously contacted with a further cable.
  • several receptacles for a plurality of further cables can be provided, which allow a comparatively concentric conductor routing, which also has a favorable effect on the required installation space, especially when a large conductor cross-section is required to ensure a high current-carrying capacity.
  • the electrically conductive connection to the further cable is established by means of a screw contact.
  • the electrically conductive connection between the screen and the further cable is therefore easy to establish and, in particular, does not require any special tools or special devices such as welding devices.
  • the screw contact comprises a clamping screw with a tear-off head. This ensures that the tightening torque is always the same without a fitter having to have a torque wrench available for this purpose.
  • the receptacle is advantageously made by a bore in the first and / or second contact element and / or the protective tube. This type of recording is particularly easy to implement in terms of production technology.
  • the receptacle is produced by a flat area on the outer circumferential surface of the first and / or second contact element and / or the protective tube. It is expedient for threaded holes to be provided in the flat area so that electrical contact can be made with another cable by means of a screw connection.
  • tensioning screws can be provided as tensioning means, which extend between the first and the second contact element.
  • a screen connection which comprises an arrangement according to one of the preceding claims and a cable which has a cable core which is surrounded by a screen over its entire length.
  • the screen is included in the arrangement for making contact. Since an arrangement according to the first aspect of the present invention is used for the shield connection, all of the advantages mentioned in connection with the arrangement are also realized by the shield connection.
  • FIG. 1 shows an exemplary embodiment of an arrangement according to the invention for making contact with a cable, which is designated as a whole by the reference symbol 100.
  • the arrangement 100 is mounted on a cable 101, for example a high-voltage cable 101.
  • the high-voltage cable 101 has an inner cable core 102 which is surrounded by an insulating layer 103.
  • a screen 104 which is made from a metal strip, lies on the insulating layer.
  • the metal strip consists of aluminum or an aluminum alloy, although other metals, in particular copper, can also be used to produce the screen 104.
  • An insulating jacket 106 surrounds the cable 101.
  • the high-voltage cable 101 is preferably flexible as a whole, so that its components, ie the cable core 102, the insulating layer 103, the shield 104 and the outer insulating jacket 106 are also flexible.
  • the high-voltage cable 101 is connected to an electrical device (not shown) which, for. B. can be another high-voltage cable or an electrical set. It is generally necessary to make electrical contact with both the cable core 102 and the screen 104. In particular in the case of the smooth screens 104 described above, which are made from a metal strip, the contacting of the There are often difficulties with the shield, in particular when further lines have to be connected to the shield 104.
  • the arrangement 100 serves to make contact with the aluminum strip serving as a screen 104.
  • the cable core 102 is supplemented by an in Figure 1 Cable set not shown connected or connected.
  • a mounting direction M runs from one end of the cable in Fig. 1 left to right.
  • the arrangement 100 has a first contact element 107 and a second contact element 108.
  • the contact element 107 is also referred to below as a clamping sleeve and the second contact element 108 as a counter holder.
  • the two contact elements 107 and 108 are essentially cylindrical and have central passages 109 and 110, respectively.
  • the contact elements 107 and 108 are connected to one another by means of threaded bolts 111, nuts 112 and washers 113, in particular braced to one another.
  • the threaded bolts 111 are screwed into threaded holes 114 which are provided in a flange 116 which is molded onto the clamping sleeve 107.
  • the threaded bolts 111 are guided through through bores 117 in the second contact element 108, so that the two contact elements 107 and 108 can be braced together by tightening the nuts 112.
  • the first contact element 107 can also be part of a housing of a further electrical device to which the cable 101 is connected.
  • the contact elements 107, 108 are made of a metal with good electrical conductivity, preferably an aluminum alloy.
  • the passage 109 of the first cylindrical contact element 107 is delimited by a cylinder jacket 118 with a conical outer surface 119 which forms a first contact area.
  • the conical outer surface 119 tapers conically in the assembly direction M, ie away from the cable end.
  • the conical outer surface 119 of the first contact element 107 and / or the conical inner surface 123 of the second contact element 108 has a structure 121 which, for. B. by sandblasting, serration or corrugation, is formed to the effective surface and the roughness of the first contact area increase. It is advantageous if that contact element has the structuring 121 which also contains the receptacle 201 for the cables 202.
  • the aluminum strip 104 is advantageously designed as a closed aluminum foil within the high-voltage cable 101, which surrounds the cable core 102 in a tubular manner.
  • the insulation jacket 106 is removed from the screen 104 and the otherwise closed aluminum foil that forms the screen 104 is divided into longitudinal strips 127.
  • the longitudinal strips 127 are bent radially slightly outward, so that the conical outer surface 119 of the clamping sleeve 107 finds space under the longitudinal strips 127. In other words: the longitudinal strips 127 rest on the conical outer surface 119 of the contact element.
  • the conical inner surface 123 of the second contact element or counter holder 108 is arranged above the longitudinal strip 127, so that the result is that the longitudinal strips 127 lie between the conical outer surface 119 of the clamping sleeve 107 and the conical inner surface 123 of the counter holder 108 and are clamped there as soon as the nuts 112 get dressed by.
  • the structuring 121 or 123 penetrate an aluminum oxide layer which may be present on the longitudinal strip 127 and which can worsen or hinder the electrical contact.
  • it can also be widened conically, e.g. by means of a likewise conically shaped driving wedge, which is driven under the aluminum tube and thus widens the aluminum tube conically at a corresponding angle to the contact element.
  • the drive wedge is divided into several segments in order to gradually drive the segments of the drive wedge under the aluminum tube with hammer blows on a large outer diameter.
  • the drive wedge is also used when the screen is designed as a closed aluminum band.
  • FIG. 10 shows the arrangement 100 in a partially cut-away representation and illustrates further features that are shown in the representation in FIG Figure 1 are not visible.
  • the cut is made through the counter holder 108 so that a receptacle 201 in the counter holder 108 is visible.
  • the receptacle 201 is designed as an axial blind hole in the cylinder jacket 122 of the counter holder 108 and receives a cable core 202 of a further cable 203, which is stripped at one end.
  • a radial threaded bore 204 opens perpendicularly into the receptacle 201.
  • a clamping screw 206 is screwed into the threaded bore 204, which clamps the cable core 202 of the further cable 203 and electrically connects it to the counter holder 108.
  • the clamping screw 206 is shown as a screw with a tear-off head in order to limit the tightening torque with which the further cable 203 is clamped. In other exemplary embodiments, however, screws without a tear-off head can also be used, which are tightened with a torque wrench.
  • the diameter of the receptacle 201 can be varied as desired within the framework of what the material thickness of the cylinder jacket 122 allows, in order to electrically connect further cables of different diameters to the arrangement 100 or the screen 104.
  • the thickness of the cylinder jacket 102 and the diameter of the receptacle 201 are matched to one another in such a way that a mechanically stable screw clamp connection with the further cable 203 is always ensured.
  • Figure 2B shows a further embodiment of a counter holder 108 in a plan view, in which the receptacles are milled out of the counter holder 108 as flat recesses 207. Radial threaded bores (not visible) are provided in the area of the recesses 207 so that a cable lug of a further cable can be screwed tight there.
  • a counter holder 108 In a further exemplary embodiment of a counter holder 108, not shown in the drawing, the two types of receptacles 201, 207 for further cables 203 are combined with one another, so that Depending on the application, the most suitable contact is always available.
  • the arrangement 100 according to the invention makes it possible to contact the shield of a cable securely by means of simple screw connections and, in addition, to connect further cables to the shield 104 by means of screw connections.
  • Figure 3 shows a further embodiment of the arrangement 100 according to the invention, which differs from that in Figure 1 shown by an additional protective tube 301, which extends over the cable 101 and protects the cable 101 from mechanical damage.
  • a receptacle 302 is provided on the protective tube 301, where a further cable, for example a flat ribbon stranded wire 303, can be fastened with a screw 304 and makes electrical contact with the protective tube 301.
  • the receptacle 302 is a flat radial projection with a threaded hole.
  • the receptacle 302 can also be just a threaded hole.
  • a cable is provided in a step S1 and an arrangement according to the invention is provided in a step S2.
  • the counter holder 108 is pushed onto one end of the cable 101, specifically in the position shown in FIG Figure 1 indicated mounting direction M.
  • the insulating jacket 106 is removed from the cable 101 in order to first expose the screen 104 and then expand it. If it is a smooth screen that is formed from a metal strip, before the screen 104 is expanded, the screen is previously divided into longitudinal strips 127 or the screen is widened conically. This creates a cavity under the umbrella.
  • a step S5 the clamping sleeve 107 is pushed onto the cable so that the expanded screen 104 comes to rest on the conical outer surface 119 of the clamping sleeve 107.
  • the counter holder is pushed onto the clamping sleeve 107 so that the expanded screen 104 comes to lie between the conical outer surface 119 of the clamping sleeve 107 and the conical inner surface 123 of the counter holder 108.
  • the clamping sleeve 107 and the counter holder 108 are clamped together in order to establish electrical contact with the screen 104.
  • the invention has been described in connection with a screen 104 made of metal foil.
  • the invention can also be applied to the screens made from wires or from a wire mesh.
  • the wires or the wire mesh are placed between the conical outer surface 119 of the clamping sleeve 107 and the conical inner surface 123 of the counter holder 108 and contacted by tensioning the clamping sleeve with the counter holder.
  • the cable core 102 and / or 202 is designed as a stranded wire which, if necessary, is provided with a crimp sleeve. Furthermore, it is not relevant for the present invention from which metal the cable cores 102 and 202 are made. Suitable metals are, for example, copper and aluminum or aluminum alloys.
  • the cable core 202 it is also possible for the cable core 202 to be electrically connected to the counter holder 108 by welding or soldering.
  • screw connections are advantageous in terms of the possibility of being able to connect different materials to one another and occupational safety.

Landscapes

  • Cable Accessories (AREA)
  • Insulated Conductors (AREA)

Claims (11)

  1. Disposition (100) pour la mise en contact d'un blindage électrique (104), d'un câble (101), qui comprend un conducteur isolé, qui est conçu comme un conducteur de câble (102), qui est entouré sur toute sa longueur par le blindage (104), dans laquelle la disposition comprend :
    - un premier élément de contact (107), qui comprend un passage central (109) pour le câble (101) et une surface externe conique (119) ;
    - un deuxième élément de contact (108), qui comprend un passage central (110) pour le câble (101) et une surface interne conique (123) opposée à la surface externe conique (119), qui est adaptée à la surface externe conique (119) du premier élément de contact (107) de façon à ce qu'une partie d'extrémité (126) du blindage puisse être serrée et mise en contact entre la surface externe conique (119) et la surface interne conique (123) ;
    - des moyens de serrage (111, 112, 123), afin de serrer entre eux les premier et deuxième éléments de contact (107, 108),
    et dans laquelle, dans le premier et/ou deuxième élément de contact (108), est prévu un logement (201, 207) pour au moins un autre câble (203), dans laquelle le logement (201, 207) est conçu pour établir une liaison électro-conductrice avec l'autre câble (203) et
    caractérisée en ce que
    la surface externe (119) du premier élément de contact (107) se rétrécit de manière conique dans une direction de montage (M), dans laquelle la direction de montage (M) s'étend le long d'un axe longitudinal de câble (A) en direction de l'extrémité du câble vers le câble (101).
  2. Disposition selon la revendication 1, caractérisée en ce que la disposition comprend un tube de protection (301).
  3. Disposition selon la revendication 2, caractérisée en ce que le tube de protection (301) comprend un logement (302) pour un autre câble.
  4. Disposition selon la revendication 3, caractérisée en ce que la liaison électro-conductrice avec l'autre câble (203) est établie au moyen d'un contact vissé.
  5. Disposition selon la revendication 4, caractérisée en ce que le contact vissé comprend une vis de serrage (206) avec une tête d'arrachement.
  6. Disposition selon l'une des revendications précédentes, caractérisée en ce que le logement (201) est réalisé à l'aide d'un perçage dans le premier et/ou le deuxième élément de contact (108).
  7. Disposition selon l'une des revendications 1 - 5, caractérisée en ce que le logement (207) est réalisé à l'aide d'une partie plate sur une surface circonférentielle externe du premier et/ou du deuxième élément de contact (107, 108) et/ou du tube de protection.
  8. Disposition selon l'une des revendications précédentes, caractérisée en ce que les moyens de serrage sont des vis de serrage (111) qui s'étendent entre les premier et deuxième éléments de contact (107, 108).
  9. Liaison blindée qui comprend une disposition selon l'une des revendications précédentes et un câble (101) qui comprend un conducteur de câble (102), qui est entouré sur toute sa longueur d'un blindage (104), dans laquelle le blindage (104) est logé dans la disposition (100) pour la mise en contact.
  10. Procédé de fabrication d'une liaison blindée selon la revendication 9, dans lequel le procédé comprend :
    - la mise à disposition d'un câble (101), qui comprend un conducteur de câble (102), qui est entouré, sur toute sa longueur, d'un blindage (104) ;
    - la mise à disposition d'une disposition (100) selon l'une des revendications 1 - 8 ;
    - l'insertion du deuxième élément de contact (108) sur le câble (101) ;
    - la réalisation d'une cavité sous le blindage (104) au niveau d'une portion d'extrémité (126) du câble (101) ;
    - l'insertion du premier élément de contact (107) sur le câble (101), de façon à ce que la surface externe conique (119) du premier élément de contact (107) arrive dans la cavité ;
    - le rapprochement du deuxième élément de contact (108) du premier élément de contact (107), de façon à ce que le blindage arrive entre la surface externe conique (119) du premier élément de contact (107) et la surface interne conique (123) du deuxième élément de contact (108) ; et
    - serrage des éléments de contact (107, 108) entre eux.
  11. Procédé selon la revendication 10, dans lequel, si le câble comprend un blindage lisse (104), avant la réalisation de la cavité sous le blindage, une étape supplémentaire suivante est exécutée :
    - découpe du blindage lisse (104) en au moins deux bandes (127) ou élargissement du blindage lisse.
EP17306618.4A 2017-11-22 2017-11-22 Agencement permettant de mettre en contact un blindage d'un câble Active EP3490074B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP17306618.4A EP3490074B1 (fr) 2017-11-22 2017-11-22 Agencement permettant de mettre en contact un blindage d'un câble

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17306618.4A EP3490074B1 (fr) 2017-11-22 2017-11-22 Agencement permettant de mettre en contact un blindage d'un câble

Publications (2)

Publication Number Publication Date
EP3490074A1 EP3490074A1 (fr) 2019-05-29
EP3490074B1 true EP3490074B1 (fr) 2021-05-26

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Application Number Title Priority Date Filing Date
EP17306618.4A Active EP3490074B1 (fr) 2017-11-22 2017-11-22 Agencement permettant de mettre en contact un blindage d'un câble

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5151053A (en) * 1990-03-05 1992-09-29 Yazaki Corporation Electrical connector for shielding cable
US5929383A (en) * 1997-04-07 1999-07-27 Thomas & Betts Corporation Rotationally unrestrained grounding coupling for external grounding of fittings
DK2874236T3 (da) 2013-11-19 2022-06-27 Nexans Kontaktanordning til kontakt med en kabelskærm

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