EP2166621A1 - Erdungsvorrichtung - Google Patents

Erdungsvorrichtung Download PDF

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Publication number
EP2166621A1
EP2166621A1 EP08290882A EP08290882A EP2166621A1 EP 2166621 A1 EP2166621 A1 EP 2166621A1 EP 08290882 A EP08290882 A EP 08290882A EP 08290882 A EP08290882 A EP 08290882A EP 2166621 A1 EP2166621 A1 EP 2166621A1
Authority
EP
European Patent Office
Prior art keywords
ground wire
lug
solid ground
grounding device
solid
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Withdrawn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
EP08290882A
Other languages
English (en)
French (fr)
Inventor
Martin Greiner
Erhard Mahlandt
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.)
Alcatel Lucent SAS
Original Assignee
Alcatel Lucent SAS
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 Alcatel Lucent SAS filed Critical Alcatel Lucent SAS
Priority to EP08290882A priority Critical patent/EP2166621A1/de
Publication of EP2166621A1 publication Critical patent/EP2166621A1/de
Withdrawn legal-status Critical Current

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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
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
    • 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
    • H01R13/02—Contact members
    • H01R13/025—Contact members formed by the conductors of a cable end

Definitions

  • the present invention relates to grounding devices, in particular to a grounding device at least consisting of a solid ground wire, a contact member at one end of the solid ground wire, and a lug at the other end of the solid ground wire.
  • a transmission line in an antenna system connecting transmitters and receivers to antennas must be grounded to protect said antenna system against potential damages which may result from a lightning strike.
  • the insulating jacket of the transmission line is partially removed to attach one end of a grounding device to a metallic section of said transmission line, for example the metallic outer conductor.
  • a grounding device forms an electroconductive connection between the system to be protected and ground.
  • the grounding device has a ground wire which is directly or indirectly connected to ground and thus said grounding device may act as a lightning conductor.
  • a cable lug at a loose end of said ground wire is used to attach the grounding device to a ground bar by a metal bolt.
  • US 3,643,008 shows a shielded cable construction providing for an annular clearance space between the inner and outer insulation jackets so that a grounding member can be inserted therein and internally connected to the cable shield without need for stripping insulation or taping.
  • US 6,734,355 B1 shows a ground connector implemented as a modified cable lug on a flexible ground lead that allows the convenient termination of a solid ground wire at a cable shield ground clamp.
  • the ground wire and ground clamp are electrically and mechanically attached at the modified cable lug.
  • the flexible ground lead carries the combined ground connection to a common ground point within an enclosure.
  • grounding devices comprise a stranded wire and a loose cable lug crimped to an end thereof. That is, the ground wire and the cable lug of known grounding devices are usually separate elements.
  • a grounding device is exposed to a lightning strike a magnetic field is generated causing high mechanical forces to the grounding device, affecting in particular the connection between the ground wire and the cable lug. Due to said high mechanical forces the cable lug is often removed from the ground wire causing a malfunction. Therefore, to provide a grounding device for lightning protection, all current-carrying components and junctions have to be strong enough to withstand mechanical forces applied during a lightning strike. With respect to grounding devices in which the ground wire and the cable lug are separate elements, this is difficult to achieve.
  • a further known grounding device comprises a solid ground wire, wherein a loose end of said solid ground wire is looped to form a lug.
  • the grounding device is usually connected to a ground bar by fastening the looped end of the ground wire with a screw.
  • a grounding device does not provide for a secure connection in case that the grounding device is exposed to a lightning strike, since the looped end of the solid ground wire can loose from the screw due to the high mechanical forces.
  • a grounding device comprising a solid ground wire and a lug that is formed within one end of the solid ground wire.
  • the lug is integrated in the solid ground wire.
  • the lug is formed as a through hole along the diameter of the solid ground wire.
  • the integrated lug according to the present invention is used for connecting the grounding device to ground.
  • At the other end of the solid ground wire means for electroconductively connecting the solid ground wire to an external metal structure are provided.
  • such metal structure may be grounded by means of the grounding device to provide potential equalization and/or lightning protection.
  • the metal structure is the outer conductor of a coaxial cable.
  • the grounding device according to the present invention is very robust and provides for a secure connection, since the lug is formed within the solid ground wire as an integral part thereof. That is, the lug and the solid ground wire according to the present invention form a single element without any junction and thus can not loosen from each other, even if the grounding device is subjected to high mechanical forces due to a lightning strike or other external conditions and/or influences.
  • the grounding device according to the present invention having the integrated lug provides much higher mechanical strength in comparison to known grounding devices where a cable lug and a stranded ground wire are attached (e.g. crimped) to each other or where a lug is formed by forming a loop at one end of a solid ground wire.
  • the solution according to the present invention is water tight, since moisture can neither penetrate any junction between lug and ground wire nor the solid ground wire.
  • the present invention provides for a durable grounding device, since corrosion of the junction between lug and ground wire can not occur.
  • a further advantage resulting from the construction according to the present invention is that no additional sealing (e.g. heat shrink tube) is required between the solid ground wire and the integrated lug, provided that a jacket of the solid ground wire sits tightly thereon.
  • a solid ground wire is used as a conductor between an external metal structure and ground. Therefore, moisture can not penetrate into the contact member of the grounding device, which usually comprises a contact element for connecting the external metal structure, in case the solid ground wire is directly connected to the contact element.
  • the contact member of the grounding device which usually comprises a contact element for connecting the external metal structure, in case the solid ground wire is directly connected to the contact element.
  • moisture permeates into the contact member through the capillaries of the stranded ground wire.
  • a solid ground wire has no capillaries so that moisture can not permeate the wire.
  • a method for manufacturing a grounding device provides one end of a solid ground wire with means for electroconductively connecting the solid ground wire to an external metal structure, for example a contact member comprising a contact element.
  • the other end of the solid ground wire is provided with a lug for connecting the grounding device to ground.
  • the lug is formed as a through hole along the diameter of the solid ground wire.
  • the lug is formed by punching.
  • the lug may also be formed by drilling or other suitable processes.
  • the section of the solid ground wire around the punched hole is preferably flattened with respect to the remaining section of the solid ground wire.
  • the section around the lug can be flattened by any suitable process without forming the lug. That is, flattening the section around the lug and forming the lug can be performed separately.
  • the steps of forming the lug and flatten the section around the lug may be performed within a single step, for example by a punching process, thus enabling a short and cost saving manufacturing process of the grounding device.
  • the solid ground wire has a cross section between 10 and 20 mm 2 , particularly preferred between 13 and 16 mm 2 .
  • the cross section of the solid ground wire is large enough to withstand a lightning strike.
  • a cross section of typically 16 mm 2 is required by standards.
  • the lug has a diameter between 8 and 10 mm.
  • the diameter of the lug may vary depending on the diameter of the solid ground wire. That is, the thicker the solid ground wire is the bigger the lug may be dimensioned.
  • FIG. 1 shows a grounding device 1 according to a preferred embodiment of the present invention.
  • the grounding device 1 comprises a solid ground wire 2 covered by a jacket 3.
  • a contact member 4 is provided, wherein the contact member 4 is only schematically depicted, since its configuration does not form part of the present invention.
  • the contact member 4 comprises a contact element (not shown) which electroconductively connects the grounding device 1 to an external metal structure (not shown), for example the outer conductor of a coaxial cable.
  • the solid ground wire 2 may be connected directly or indirectly to the contact element of the contact member 4.
  • the lug is a punched hole. That is, the lug 5 is formed by punching the loose end of the solid ground wire 2. By the punching process not only the lug 5 is formed (as a through hole along the diameter of the solid ground wire) but also the section of the solid ground wire 2 around the punched through hole is flattened with respect to the remaining section of the solid ground wire 2.
  • the shape of the flattened section may be determined by the punching machine or may be specifically formed as the need arises.
  • the grounding device 1 of Figure 1 is, for example, used for grounding a highfrequency cable.
  • the length of the solid ground wire 2 may vary.
  • the wire length is about 0,5 or 1,0 m.
  • Due to the simple construction of the integrated lug 5 according to the present invention the length of the solid ground wire 2 may be adapted as required.
  • the solid ground wire 2 is tailored on-site as necessary and the lug 5 is formed in the loose end thereof, for example by punching the loose end of the solid ground wire 2 or by drilling a through hole along the diameter of the solid ground wire 2.
  • a loose cable lug may be attached to the tailored end of the solid ground wire 2 as known from the prior art.
  • Figure 2 shows steps of a manufacturing method of a grounding device according to a preferred embodiment of the present invention.
  • a first step S1 one end of a solid ground wire is provided with means for electroconductively connecting the solid ground wire to an external metal structure.
  • the other end of the solid ground wire is provided with a lug for connecting the grounding device to ground.
  • the lug is formed in a third step S3 as a through hole along the diameter of the solid ground wire.
  • the end section of the solid ground wire including the lug is flattened wherein the remaining section of the solid ground wire remains unaffected. There is no prescribed order of the steps S1 to S4.
  • the manufacturing process of a grounding device according to the present invention comprises steps S1 to S4 in an arbitrary order. Furthermore, steps S3 and S4 can be performed in a single step by punching the respective end section of the solid ground wire of the grounding device according to the present invention.
  • the grounding device according to the present invention can be used in all technical fields that require a wire to be attached to a bolt by a lug for the purpose of grounding.
  • the present invention is applicable when a cross section of the solid ground wire is large enough to form a lug directly within the loose end of the wire.
EP08290882A 2008-09-18 2008-09-18 Erdungsvorrichtung Withdrawn EP2166621A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08290882A EP2166621A1 (de) 2008-09-18 2008-09-18 Erdungsvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08290882A EP2166621A1 (de) 2008-09-18 2008-09-18 Erdungsvorrichtung

Publications (1)

Publication Number Publication Date
EP2166621A1 true EP2166621A1 (de) 2010-03-24

Family

ID=40344752

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08290882A Withdrawn EP2166621A1 (de) 2008-09-18 2008-09-18 Erdungsvorrichtung

Country Status (1)

Country Link
EP (1) EP2166621A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014181741A1 (ja) * 2013-05-07 2014-11-13 矢崎総業株式会社 端子化電線

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566465A (en) * 1969-05-16 1971-03-02 Al Weiner Forming of connector on a wire and assembly therewith
US3643008A (en) 1970-10-06 1972-02-15 Whitney Blake Co Shielded cable construction providing for an internal connection to ground
DE3830030A1 (de) * 1988-09-03 1990-03-15 Bayerische Motoren Werke Ag Elektrischer anschluss in form einer schraubenverbindung
EP0744788A1 (de) 1995-05-20 1996-11-27 Alcatel Kabel AG & Co. Vorrichtung zum elektrisch leitenden Kontaktieren eines metallischen Rohres
FR2751474A1 (fr) * 1996-07-16 1998-01-23 Schneider Electric Sa Dispositif de raccordement a conducteur monobrin
US6734355B1 (en) 2003-02-07 2004-05-11 Electric Motion Company, Inc. Ground connector
DE102005047979A1 (de) * 2005-10-06 2007-04-12 Juli Motorenwerk, K.S. Rotierende elektrische Maschine und Verfahren zur Herstellung einr rotierenden elektrischen Maschine
WO2008089760A1 (en) * 2007-01-23 2008-07-31 Vestas Wind Systems A/S Flexible electric power cable and wind turbine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3566465A (en) * 1969-05-16 1971-03-02 Al Weiner Forming of connector on a wire and assembly therewith
US3643008A (en) 1970-10-06 1972-02-15 Whitney Blake Co Shielded cable construction providing for an internal connection to ground
DE3830030A1 (de) * 1988-09-03 1990-03-15 Bayerische Motoren Werke Ag Elektrischer anschluss in form einer schraubenverbindung
EP0744788A1 (de) 1995-05-20 1996-11-27 Alcatel Kabel AG & Co. Vorrichtung zum elektrisch leitenden Kontaktieren eines metallischen Rohres
FR2751474A1 (fr) * 1996-07-16 1998-01-23 Schneider Electric Sa Dispositif de raccordement a conducteur monobrin
US6734355B1 (en) 2003-02-07 2004-05-11 Electric Motion Company, Inc. Ground connector
DE102005047979A1 (de) * 2005-10-06 2007-04-12 Juli Motorenwerk, K.S. Rotierende elektrische Maschine und Verfahren zur Herstellung einr rotierenden elektrischen Maschine
WO2008089760A1 (en) * 2007-01-23 2008-07-31 Vestas Wind Systems A/S Flexible electric power cable and wind turbine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014181741A1 (ja) * 2013-05-07 2014-11-13 矢崎総業株式会社 端子化電線

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