EP3496208B1 - Dispositif de contact et système de contact pour câble coaxial haute tension - Google Patents

Dispositif de contact et système de contact pour câble coaxial haute tension Download PDF

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Publication number
EP3496208B1
EP3496208B1 EP17306725.7A EP17306725A EP3496208B1 EP 3496208 B1 EP3496208 B1 EP 3496208B1 EP 17306725 A EP17306725 A EP 17306725A EP 3496208 B1 EP3496208 B1 EP 3496208B1
Authority
EP
European Patent Office
Prior art keywords
contact
tube
cable
contact device
threaded holes
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
EP17306725.7A
Other languages
German (de)
English (en)
Other versions
EP3496208A1 (fr
Inventor
Johannes KRÖNERT
Volker Markgraf
Manfred Baesch
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 DK17306725.7T priority Critical patent/DK3496208T3/da
Priority to EP17306725.7A priority patent/EP3496208B1/fr
Publication of EP3496208A1 publication Critical patent/EP3496208A1/fr
Application granted granted Critical
Publication of EP3496208B1 publication Critical patent/EP3496208B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • H01R13/65912—Specific features or arrangements of connection of shield to conductive members for shielded multiconductor cable
    • H01R13/65914—Connection of shield to additional grounding conductors
    • 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
    • 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
    • H01R13/73—Means for mounting coupling parts to apparatus or structures, e.g. to a wall
    • H01R13/74—Means for mounting coupling parts in openings of a panel
    • H01R13/748—Means for mounting coupling parts in openings of a panel using one or more screws

Definitions

  • the invention relates to a contact device for contacting a coaxial cable, the electrical conductor of which is surrounded by a shield which is designed as a tube, in particular as a corrugated tube.
  • the invention further relates to a contact system which comprises a contact device according to the invention.
  • the invention also relates to methods for producing a contact device according to the invention and a contact system according to the invention.
  • a cable fitting is a component that terminates an electrical cable or connects it to another cable.
  • a cable fitting should create good electrical contact with the conductor and the shield of the coaxial cable and at the same time prevent moisture or dirt from getting between the components of the cable.
  • electrical insulation between the electrical conductor and the shield of the coaxial cable must be ensured.
  • a corrugated pipe is often used as a shield for this type of cable. Connecting such a high-voltage cable, for example to the housing of an electrical fitting or to another high-voltage cable, therefore requires contact to be made between both the cable core and the shield.
  • the electrical conductor should also be guided to the corresponding component in a mechanically stable manner.
  • a common method for current-carrying contact of cables with metal corrugated sheaths is welding or soldering metal contact elements. This type of contact is demanding and time-consuming. In addition, the quality of the contact depends heavily on the skills of the assembly personnel who make the contact. A consistently high quality of the contacts is therefore not easy to achieve with conventional contacting methods.
  • the US 2006/0054341 A1 relates to an electrical plug assembly with which an electrical cable is electrically connected and held in place in a distribution box, fuse box or the like.
  • a clamping screw is provided in one embodiment.
  • notched metal tongues prevent the cable from being pulled out of the plug.
  • the holding means serve only to hold the cable, which engages with an outer sheath or insulation of the cable.
  • the WO 2017/030271 A1 describes a contact sleeve 500 for electrically connecting conductors, in particular multi-wire conductors.
  • the contact sleeve is intended to prevent poor contact of the multi-wire conductor and thus undesirable heat development at the contact point.
  • the US 2008/261447 A1 discloses a connector for a coaxial cable.
  • the coaxial cable is inserted into the connector, where a needle-shaped section makes contact with the line of the coaxial cable.
  • a clamping screw which is provided with cutting edges, is screwed in and cuts through an outer jacket and a shield braid into the insulation layer of the cable.
  • the CN103 531 986B describes a device for contacting a high-voltage cable.
  • an inner ring is pushed between an inner sheath of the high-voltage cable and the shield.
  • an outer ring is attached to the inner ring with screws, whereby the shield is clamped between the rings.
  • the US$2,947,800 concerns a cable bushing used in the electrical construction industry.
  • the cable bushing comprises a tubular part which is provided with a clamping screw.
  • a Spiral hose encloses cables that are fed into a control cabinet, for example.
  • the clamping screw clamps the spiral hose in place.
  • the tubular part has a thickening in the area of the clamping screw.
  • the CN104967087 describes a tubular part made of rubber that is pushed over a high-voltage line for testing purposes.
  • the tubular part has threaded bushings into which clamping screws are screwed to contact a conductor.
  • the JP2010/180957 concerns the most economical connection of hollow concrete posts.
  • a pipe is fastened over the posts to be connected using clamping screws.
  • the EN 10 2008 025 428 A1 relates to a connecting terminal for a conductor wire.
  • the connecting terminal comprises a clamping body which consists of a bent sheet metal part.
  • a hole for a clamping screw is made through two wall sections lying one above the other using a flow forming process. This creates collar-shaped projections on the top of the upper wall section and the bottom of the lower wall section, whereby the length of the threaded hole is greater than the wall thickness of the wall sections.
  • the invention proposes a contact device according to the appended claims.
  • a clamp contact between the cable shield and the contact tube has the advantage that this type of contact is easy to produce compared to welding or soldering and also offers advantages in terms of work safety. At the same time, it is possible to achieve a more uniform quality of electrical contacts with clamp contacts, which hardly depends on the qualifications and skills of the assembly personnel. Another advantage of clamp contacts is that almost any metallic material can be combined with one another to create a to establish electrical contact. Furthermore, only simple tools are required to establish a terminal contact.
  • the threaded holes are produced using a friction-flow-drilling process, so that each threaded hole has an annular bead (201) on the inside of the contact tube.
  • This has the advantage that a greater material thickness is available for the thread compared to the wall thickness of the contact tube, and thus the length of the threaded hole is greater and a better hold of the clamping screw in the contact tube is achieved. This makes it possible, for example, to transmit greater clamping forces with the clamping screws.
  • the threaded holes are arranged with one clamping screw each on at least two circular lines on the circumference of the contact tube, evenly distributed on each circular line, with the threaded holes on adjacent circular lines being offset from one another in the circumferential direction.
  • the contact tube of the contact device can have a fastening flange at one end in order to fasten the contact device, for example, to an electrical system or a cable fitting.
  • the contact tube has at least one contact point that enables the connection of cables or strands, e.g.
  • the contact point can expediently be designed as a pin that has an internal thread or an external thread in order to attach a cable lug or the like there. It is also conceivable that the pin has a threaded pin with an external thread for fastening further contact elements.
  • the cable shield is designed as a smooth tube sheath or a corrugated tube sheath. The type of sheath chosen depends on the application. In principle, a corrugated tube sheath is more flexible than a smooth tube sheath.
  • Figure 1 shows a perspective view of a contact device 100, which has a contact tube 101.
  • the contact tube 101 has a diameter of 10 - 20 cm and a height of 10-30 cm. If necessary, these dimensions can also be chosen differently in order to adapt the contact tube 101 to specific applications.
  • the lower end of the contact tube 101 is A flange 102 is welded to the contact tube.
  • the flange 102 is provided along its circumference with fastening holes 103 for receiving fastening screws (not shown) in order to fasten the contact device to an electrical device, such as a transformer or a cable set (in Figure 1 not shown).
  • the contact tube 101 and the flange 102 are made of aluminum or an aluminum alloy. In principle, other metals can also be used, for example copper or other highly conductive metals.
  • threaded holes 106A and 106B are provided, each of which accommodates a clamping screw 107A or 107B.
  • the threaded holes 106A are distributed along a circular line 108A and the threaded holes 106B are distributed along a circular line 108B in the circumferential direction at a uniform distance.
  • two circular lines 108A and 108B are shown, in other embodiments the threaded holes can also be arranged on just a single circular line or on more than two circular lines.
  • the relevant design of the contact device 100 according to the invention depends on the respective application, in particular on how many clamping screws are required.
  • the threaded holes are preferably arranged offset from each other on different circular lines.
  • Figure 1 In the embodiment shown, a threaded hole 106B on the circular line 108B is located in the circumferential direction exactly between two threaded holes 106A that are located on the circular line 108A. This prevents the casing 104 of the contact tube 101 from being structurally weakened along axial directions by holes arranged one behind the other.
  • the contact device 100 also has a pin 111 projecting in the radial direction, which is welded to the casing 104 of the contact tube at a certain distance between the flange 102 and the circular line 108B and provides a contact point for connecting another cable
  • the pin 111 has a central threaded hole 112 in order to screw on, for example, a cable lug of the additional cable.
  • the screws 107A, 107B shown are provided with a hexagon socket.
  • other types of screws can also be used for the present invention, in particular screws with a shear head.
  • Figure 2A shows a cross section through the contact tube 101 at the level of the circular line 108B.
  • the threaded holes 106B are distributed at equal intervals on a circumferential line of the casing 104 of the contact tube 101.
  • Figure 2B shows an enlarged section of Figure 2A and illustrates a manufacturing-related special feature of the contact tube 101.
  • the bores for the threaded holes are produced by a friction-flow-drilling process.
  • a rapidly rotating steel tool is pressed in a radial direction onto the casing 104 of the contact tube 101.
  • the frictional heat causes the metal to flow, which displaces the material under the rotating tool.
  • beads 201 form around the respective borehole in the contact tube 101, which are directed inwards in the radial direction in the contact tube 101. This creates a borehole whose length I is greater than the thickness d of the casing 104 of the contact tube 101.
  • a thread is cut into the borehole to produce a threaded hole, for example a threaded hole 106A or 106B.
  • the length of the threaded hole corresponds to the length l of the borehole.
  • the length of a threaded hole conventionally produced with a twist drill would correspond to the length of the jacket thickness d of the contact tube 101.
  • the threaded hole in the contact tube according to the invention is mechanically more stable due to its greater length, so that it is possible to exert comparatively greater clamping forces with the clamping screws 107A and 107B.
  • Figure 3 shows schematically the structure of a high-voltage cable 300, which has an outer jacket 301.
  • a shield 302 surrounds a multi-core conductor 303, which is formed from individual wires 304.
  • the individual wires 304 are surrounded by a sheath 306, which bundles the individual wires 304 to form the conductor 303.
  • the shield 302 is designed as a corrugated tube.
  • the electrical conductor 303 is surrounded by a dielectric 307, which is followed by an insulation layer 308, which lies between the dielectric 307 and the shield 302.
  • the conductor 303 is designed as a solid individual conductor.
  • Figure 4 shows a cross-sectional view through the contact device 100 with a mounted HV coaxial cable 301, wherein the cut surface is taken along the line 4-4 in Figure 1
  • the screws 107A and 107B are screwed into the threaded holes 106A and 106B of the contact tube 101, respectively.
  • the outer jacket 301 is removed from the cable 300 by a length that corresponds approximately to the length of the contact tube 101 plus the length that is required to connect the cable 301 inside an electrical device to a connection provided for it.
  • the corrugated tube 302 is exposed inside the contact device 100.
  • the screws 107A and 107B are screwed in, clamp the corrugated tube 302 essentially in the middle of the contact tube 101 and establish an electrically conductive contact between the contact tube 101 and the corrugated tube 302.
  • This arrangement also has the advantage that in the event of a short circuit and high current flows through the conductor 303 and the contact tube 101, the electrodynamic forces that arise cancel each other out.
  • the arrangement has the advantage that reproducible electrical contacts between the corrugated tube 302 and the contact tube 101 can be produced in a simple manner.
  • the arrangement of the clamping screws 107A and 107B, which are evenly spaced on a circular line 108A or 108B and offset from each other on different circular lines, also leads, among other things, to the Clamping forces on the screen 302 are distributed comparatively evenly, which has a positive effect on the dimensional stability of the screen 302.
  • a flow chart with the essential process steps for producing a contact tube 101 according to the invention is shown schematically.
  • a cylindrical tube made of, for example, aluminum or an aluminum alloy is provided.
  • radial holes are drilled into the casing 104 of the contact tube 101, which are evenly spaced on a circular line on the circumference of the casing 104.
  • the holes are preferably drilled using a friction-flow-drilling process in which a rapidly rotating steel tool is pressed onto the casing 104.
  • the material of the casing changes into a flowable state, which on the one hand creates a hole and on the other hand creates a bead 201 surrounding the hole on the inside of the casing.
  • Threads are cut into the holes thus formed, so that threaded holes are created into which the contact screws 107A and 107B are screwed. If necessary, a flange 102 can be welded to the contact tube 101 before or after the threaded holes 106A and 106B are made.
  • the contact device produced in this way is used to produce a contact system.
  • the process steps for producing the contact system are shown schematically in a flow chart in Figure 6 shown.
  • a contact device 100 according to the invention is provided.
  • the outer jacket 301 is removed from the cable 300 in order to expose the shield 302 designed as a corrugated tube.
  • the cable 300 is inserted into the contact device 100 with the end at which the corrugated tube 302 is exposed.
  • the clamping screws 107A and 107B are screwed in in order to contact the corrugated tube 302 in a substantially central position in the contact tube 101.
  • another cable can be connected to pin 111, which can be fastened with a screw.

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  • Cable Accessories (AREA)

Claims (5)

  1. Dispositif de contact (100) pour un câble haute tension (300) avec un conducteur électrique isolé (303), qui est entouré par un blindage (302) conçu comme un tube, dans lequel le dispositif de contact comprend un tube de contact (101) qui loge le câble (300),
    dans lequel, dans le tube de contact (101), sont prévus plusieurs trous filetés (106A, 106B) avec chacun une vis de serrage (107A, 107B), caractérisé en ce que
    les trous filetés (106A, 106B) sont fabriqués à l'aide d'un processus d'abrasion-fluage-perçage, de sorte que chaque trou fileté (106A, 106B) présente, sur la face interne du tube de contact, un renflement annulaire (201),
    les trous filetés (106A, 106B) sont répartis uniformément sur au moins deux lignes circulaires (108A, 108B) sur la circonférence du tube de contact (101) sur chaque ligne circulaire (108A, 108B),
    les trous filetés (106A, 106B) sont disposés de manière décalée entre eux dans la direction de la circonférence sur des lignes circulaires adjacentes et
    les vis de serrage (107A, 107B) sont conçues pour la mise en contact du blindage (302) du câble (300).
  2. Dispositif de contact (100) selon la revendication 1, caractérisé en ce que le dispositif de contact comprend au moins un point de contact qui permet le raccordement de câbles ou de torons.
  3. Dispositif de contact selon la revendication 2, caractérisé en ce que le point de contact est conçu comme un tenon (111) qui présente un filetage interne ou un filetage externe.
  4. Système de contact qui comprend un dispositif de contact (100) selon l'une des revendications précédentes ainsi qu'un câble haute tension (300), qui comprend un conducteur électrique (303) qui est entouré d'un blindage (302) conçu comme un tube.
  5. Système de contact selon la revendication 4, caractérisé en ce que le blindage (302) est une enveloppe de tube lisse ou une enveloppe de tube ondulée.
EP17306725.7A 2017-12-08 2017-12-08 Dispositif de contact et système de contact pour câble coaxial haute tension Active EP3496208B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DK17306725.7T DK3496208T3 (da) 2017-12-08 2017-12-08 Kontaktanordning og kontaktsystem til koaksiale højspændingskabler
EP17306725.7A EP3496208B1 (fr) 2017-12-08 2017-12-08 Dispositif de contact et système de contact pour câble coaxial haute tension

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17306725.7A EP3496208B1 (fr) 2017-12-08 2017-12-08 Dispositif de contact et système de contact pour câble coaxial haute tension

Publications (2)

Publication Number Publication Date
EP3496208A1 EP3496208A1 (fr) 2019-06-12
EP3496208B1 true EP3496208B1 (fr) 2024-04-10

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17306725.7A Active EP3496208B1 (fr) 2017-12-08 2017-12-08 Dispositif de contact et système de contact pour câble coaxial haute tension

Country Status (2)

Country Link
EP (1) EP3496208B1 (fr)
DK (1) DK3496208T3 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947800A (en) * 1955-10-10 1960-08-02 Thomas & Betts Corp Insulated electrical raceway fitting
DE202006018023U1 (de) * 2006-11-24 2007-02-01 Phoenix Contact Gmbh & Co. Kg Klemmhülse für elektrische Leiter
DE102008025428A1 (de) * 2008-05-27 2009-12-03 Phoenix Contact Gmbh & Co. Kg Elektrische Anschlusseinrichtung und Verfahren zur Herstellung einer solchen
JP2010180957A (ja) * 2009-02-05 2010-08-19 Hiroyasu Minayoshi 連結具および該連結具を用いた連結方法
US20130143433A1 (en) * 2010-08-09 2013-06-06 Phoenix Contact Gmbh & Co. Kg Connection terminal
CN104967087A (zh) * 2015-04-30 2015-10-07 科耐特电缆附件股份有限公司 高压电缆橡胶件接头试验用连管
US20150375694A1 (en) * 2014-06-25 2015-12-31 Ford Global Technologies, Llc Method of Forming a Grounding Point on an Aluminum Member

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7075007B2 (en) * 2004-09-13 2006-07-11 Bridgeport Fittings, Inc. Snap fit electrical connector assembly with conical outer snap fit retainer and one or more internal snap fit wire retainers
US7476119B2 (en) * 2007-04-23 2009-01-13 D'addario & Company, Inc. Plug connector
CN103531986B (zh) * 2013-10-16 2016-05-25 广东吉熙安电缆附件有限公司 一种电缆铠装的接地方法
WO2017030271A1 (fr) * 2015-08-14 2017-02-23 엘에스전선 주식회사 Structure de raccord de câbles, procédé de raccord de câbles et manchon conducteur utilisé en son sein pour raccord de câble

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2947800A (en) * 1955-10-10 1960-08-02 Thomas & Betts Corp Insulated electrical raceway fitting
DE202006018023U1 (de) * 2006-11-24 2007-02-01 Phoenix Contact Gmbh & Co. Kg Klemmhülse für elektrische Leiter
DE102008025428A1 (de) * 2008-05-27 2009-12-03 Phoenix Contact Gmbh & Co. Kg Elektrische Anschlusseinrichtung und Verfahren zur Herstellung einer solchen
JP2010180957A (ja) * 2009-02-05 2010-08-19 Hiroyasu Minayoshi 連結具および該連結具を用いた連結方法
US20130143433A1 (en) * 2010-08-09 2013-06-06 Phoenix Contact Gmbh & Co. Kg Connection terminal
US20150375694A1 (en) * 2014-06-25 2015-12-31 Ford Global Technologies, Llc Method of Forming a Grounding Point on an Aluminum Member
CN104967087A (zh) * 2015-04-30 2015-10-07 科耐特电缆附件股份有限公司 高压电缆橡胶件接头试验用连管

Also Published As

Publication number Publication date
DK3496208T3 (da) 2024-07-08
EP3496208A1 (fr) 2019-06-12

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