EP3618191B1 - Borne de connexion et appareil électrique - Google Patents

Borne de connexion et appareil électrique Download PDF

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Publication number
EP3618191B1
EP3618191B1 EP18306158.9A EP18306158A EP3618191B1 EP 3618191 B1 EP3618191 B1 EP 3618191B1 EP 18306158 A EP18306158 A EP 18306158A EP 3618191 B1 EP3618191 B1 EP 3618191B1
Authority
EP
European Patent Office
Prior art keywords
terminal
threaded hole
conductor
connecting bolt
clamp
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
EP18306158.9A
Other languages
German (de)
English (en)
Other versions
EP3618191A1 (fr
Inventor
Volker Markgraf
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 EP18306158.9A priority Critical patent/EP3618191B1/fr
Priority to US16/555,440 priority patent/US10923838B2/en
Publication of EP3618191A1 publication Critical patent/EP3618191A1/fr
Application granted granted Critical
Publication of EP3618191B1 publication Critical patent/EP3618191B1/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
    • 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
    • H01R11/03—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 characterised by the relationship between the connecting locations
    • H01R11/05—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 characterised by the relationship between the connecting locations the connecting locations having different types of direct connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/02—Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter
    • 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
    • H01R4/304—Clamped connections, spring connections utilising a screw or nut clamping member having means for improving contact
    • 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
    • H01R4/305—Clamped connections, spring connections utilising a screw or nut clamping member having means for facilitating engagement of conductive member or for holding it in position
    • 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
    • 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
    • H01R4/56—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 one conductor screwing into another
    • 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
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/2416—Means for guiding or retaining wires or cables connected to terminal blocks

Definitions

  • the invention relates to a clamp for connecting a conductor to a connection part, in particular to a connection bolt of an electrical apparatus, for example a transformer.
  • the invention relates to an electrical apparatus with a connecting bolt onto which a terminal according to the invention is screwed.
  • connection bolts to which electrical lines are connected, the connecting bolts being in many cases designed as threaded bolts.
  • connection bolts can be found, for example, on the low-voltage side of transformers.
  • Electrical lines are often connected to the terminal bolts with screw terminals.
  • a clamp for connecting a conductor to a terminal stud of a transformer is known.
  • the terminal is designed in such a way that the lines are routed away at right angles to the longitudinal axis of the connecting bolt. This means that with a connection bolt oriented in the vertical direction, the cables are routed in the horizontal direction.
  • a connection bolt oriented in the vertical direction the cables are routed in the horizontal direction.
  • a different type of terminal is required. This means that at least two different types of clamps must be available.
  • the U.S. 2018/006399 A1 relates to a clamp for portable power supplies and other applications.
  • the terminal has a clamping screw by means of which a conductor 30 inserted into a conductor opening is clamped in order to establish an electrically conductive connection with the terminal.
  • the terminal has a further threaded hole for fastening the terminal to a busbar, for example.
  • the U.S. 2011/237140 A1 discloses a clamp that has a passage with which the clamp can be mounted, for example, on a ground connection by means of a pressure screw.
  • the GB 1 422 935 A describes a clamp with multiple clamp screws and holes to mount the clamp.
  • the surface of the openings for the conductors is provided with a surface structure.
  • an object of the present invention is to provide an alternative clamp that can be used more flexibly than previously known clamps and that can be clamped on a connection bolt in a simple manner.
  • the invention proposes a clamp according to claim 1.
  • the clamp has a first and a second threaded hole which cross perpendicularly.
  • the internal threads of the first and second threaded holes match the external threads of the terminal bolt.
  • the terminal can therefore be screwed onto the connection bolt in two different orientations.
  • the terminal has a conductor channel along an axis that is parallel to an axial direction of the first threaded hole.
  • the clamp has a further threaded hole for receiving a pressure screw, which opens into the conductor channel.
  • the threaded hole is oriented perpendicular to the axis of the conductor channel.
  • the clamp has a second pressure screw which is screwed into the same threaded hole as the terminal bolt but in the opposite direction as the terminal bolt. This pressure screw tightens the terminal on the connection bolt without further means being required for this, in particular no second pressure screw is necessary for this.
  • the design of the terminal allows one or more conductors to be connected in two different orientations with respect to the longitudinal axis of the terminal stud. Therefore, the terminal is suitable for different installation positions, eliminating the need to keep different terminals for different installation positions.
  • the threaded hole in which the terminal stud is not screwed allows inspection of the correct mounting of the clamp on the terminal stud.
  • the free threaded hole can be used to attach another connection bolt, for example a ball joint.
  • the conductor channel has grooves and/or projections.
  • the structured inner surface of the conductor channel generates a high contact pressure for one in the Conductor channel recorded conductor, so that any existing oxide layers on the surface of the conductor are broken up and a good electrical contact is created.
  • a plurality of conductor channels are advantageously provided in the terminal, in particular two parallel conductor channels.
  • a higher number of conductor channels allows a corresponding number of wires to be connected to the terminal.
  • the conductor channels are arranged to the left and right of one of the two threaded holes. This configuration has proven to be particularly space-saving and expedient during assembly.
  • the first and the second threaded hole which cross each other perpendicularly, can each be arranged centrally in a main surface of a clamp body of the clamp.
  • This embodiment enables the terminal to be mounted symmetrically on the connecting bolt.
  • the invention proposes an electrical apparatus with a connection bolt onto which a terminal according to the first aspect of the invention is screwed.
  • the electrical apparatus is, for example, a transformer, in particular the low-voltage side of a transformer.
  • FIG. 1 12 is a perspective view of an embodiment of a clamp according to the invention, denoted as a whole by reference numeral 100.
  • FIG. 1 a connecting bolt 101 for an electrical apparatus is shown below the terminal 100, which is provided with an external thread 102. Only part of a housing 103 of the electrical apparatus is shown and indicated schematically with a line.
  • the connecting bolt 101 is passed through the housing 103 and insulated from the housing 103 with insulators 106,107.
  • the electrical apparatus is a transformer and the housing 103 is accordingly the transformer housing.
  • it can be the low-voltage side of a transformer that is equipped with bushings according to DIN EN 50386.
  • the invention is not limited to this type of connecting bolt, but rather can also be applied to other types of threaded bolts to which electrical lines are to be connected.
  • the proposed clamp 100 has a clamp body 108 which is essentially cuboid. Accordingly, the clamp body 108 comprises a first main surface 109a and an opposite second main surface 109b. In addition, the clamp body 108 has a third main surface 109c, which is figure 1 is on top and a fourth main surface 109d which is opposite to the third main surface 109c.
  • a first threaded hole 111 centrally located in the first main surface 109a extends from the first main surface 109a to the second main surface 109b.
  • a second threaded hole 112 extends from the third main surface 109c to the fourth main surface 109d and is also centrally located in the middle of the third and fourth main surfaces, respectively. Accordingly, the first and second threaded holes 111, 112 intersect in the center of the clamp body 108.
  • the internal threads of the threaded holes 111, 112 match the external thread 102 of the connecting bolt 101.
  • a continuous first and second conductor channel 113, 114 are arranged on both sides of the first threaded hole.
  • the conductor channels 113 and 114 thus extend from the first main surface 109a to the second main surface 109b.
  • a threaded hole 116 is provided in the third main surface 109c, which opens into the first conductor channel 113 and which accommodates a pressure screw 117 . It is consequently possible with the pressure screw 117 to clamp a conductor inserted into the conductor channel 113 in the terminal body 108 .
  • a threaded hole 118 is provided in the third main surface 109c, which opens into the second conductor channel 114 and which accommodates a pressure screw 119, with which a conductor inserted into the conductor channel 114 can be clamped in the terminal body 108.
  • FIG 2 shows the terminal 100 screwed onto the connection bolt 101.
  • the connection bolt 101 is screwed into the second central threaded hole 112 to such an extent that the connection bolt 101 protrudes approximately to the middle of the first central threaded hole 111.
  • the pressure screw 121 is screwed from the third main surface 109c against the connection bolt 101 into the second central threaded hole 112, so that the end faces of the connection bolt 101 and the pressure screw 121 are pressed against one another and thereby mechanically brace the terminal body 108 with the connection bolt 101 and at the same time Establish good electrical contact between terminal body 108 and connecting bolt 101.
  • a single pressure screw 121 is therefore sufficient to generate the contact pressure and achieve mechanical bracing on the connecting bolt.
  • the first central threaded hole 111 enables an assembly person to carry out a visual inspection to check whether the clamp 100 has been screwed onto the connection bolt 101 far enough or too far.
  • the insides of the conductor channels 113, 114 have an area that is provided with longitudinal ribs 122 as a surface structure.
  • the longitudinal ribs 122 have a triangular cross-section. In other exemplary embodiments, other cross-sectional shapes can also be selected.
  • the areas with the surface structure are in the conductor channels 113,114 on the side opposite to the side where the pressure screw 117 or 119 enters the conductor channel 113 or 114, respectively.
  • the pressure screw 117 or 119 therefore presses the conductor against the corresponding surface structure of the longitudinal ribs 122, which break up any oxide layer that may be present on the conductor and in this way promote the establishment of a good electrical contact.
  • Such disturbing insulating oxide layers occur, for example, in conductors made of aluminum or aluminum alloys.
  • FIG 3 1 is a perspective view of terminal 100 mounted on terminal stud 101.
  • FIG. Two conductors 301 and 302 are mounted in the terminal 100 and are illustrated by short conductor sections.
  • An arrow V points to figure 3 indicates a vertical direction, while an arrow H indicates a horizontal direction. This convention shall apply to all figures.
  • the conductor channels 113, 114 are oriented in the horizontal direction and thereby allow a simple assembly of lines 301, 302 running horizontally.
  • FIG 4 is in contrast to figure 3 the clamp 100 is screwed onto the connecting bolt 101 by means of the first central threaded hole 111, so that the conductor channels extend parallel to the connecting bolt 101 and thus enable lines 301, 302 running in the vertical direction to be easily installed.
  • the horizontal and vertical connection options for the lines 301, 302 are consequently achieved with one and the same clamp 100, which is only screwed onto the connection bolt in two different orientations.
  • the proposed clamp thus eliminates the need to keep different clamps in order to connect cables in different orientations with respect to the connection bolt.
  • figure 5 shows the terminal 100 mounted on the connection bolt 101, with the conductor channels 113, 114 as in figure 3 are oriented horizontally.
  • the connecting bolt is screwed into the second central threaded hole 112 figure 5 illustrated embodiment, a ball stud 501 is screwed into the first central threaded hole 111 in order to create further connection options for additional lines.
  • figure 6 shows the terminal 100 mounted on the connecting bolt 101, with the conductor channels 113, 114 as in figure 4 are oriented vertically. With this orientation, the connecting bolt is screwed into the second central threaded hole 112 .
  • a ball stud 501 is screwed into the second central threaded hole 111 in order to create further connection options for additional lines.
  • FIG. 5 A comparison between the Figures 5 and 6 Fig. 5 shows that the additional ball stud 501 always has a horizontal orientation when the connecting stud has a vertical orientation, because the free central threaded hole is always oriented horizontally in this case.
  • the pressure screw in 117, 119 makes direct contact with the connected conductors.
  • movable pressure pieces can also be provided, which are pressed onto the conductor by the pressure screw in order to establish the electrical contact.
  • the proposed terminal can be made, for example, from copper, aluminum and their alloys and other electrically highly conductive metals and their alloys.
  • the connected line is not clamped directly with a pressure screw, but a movable pressure part is provided in the conductor channel in the clamp.
  • a movable pressure part is provided in the conductor channel in the clamp.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)

Claims (6)

  1. Borne pour la connexion d'un conducteur (301, 302) avec une tige de connexion (101) d'un appareil électrique qui est muni d'un filetage externe (102), dans laquelle la borne comprend un canal de conducteur (113, 114) et un trou fileté (116, 118) pour le logement d'une vis de pression et dans laquelle le trou fileté (116, 118), pour le logement de la vis de pression, est orienté perpendiculairement à l'axe du canal de conducteur (113, 114), caractérisée en ce que la borne (100) comprend un premier et un deuxième trous filetés (111, 112), qui se croisent perpendiculairement, dans lesquels le filetage interne du premier et du deuxième trous filetés (111, 112) sont adaptés au filetage externe (102) de la tige de connexion (101), de façon à ce que la borne puisse être vissée dans deux orientations différentes sur la tige de connexion (101), en ce que le canal de conducteur s'étend le long d'un axe qui est parallèle à une direction axiale du premier trou fileté et en ce que la borne comprend une deuxième vis de pression (121) qui est vissée dans le même trou fileté que la tige de connexion (101), mais dans le sens opposé à la tige de connexion.
  2. Borne selon la revendication 1, caractérisée en ce que le canal de conducteur (113, 114) comprend des rainures (122) et/ou des saillies.
  3. Borne selon la revendication 1 ou 2, caractérisée en ce que la borne comprend plusieurs, plus particulièrement deux, canaux de conducteurs (113, 114).
  4. Borne selon la revendication 3, caractérisée en ce que les canaux de conducteurs (113, 114) sont disposés à gauche et à droite du premier ou du deuxième trou fileté (111, 112).
  5. borne selon l'une des revendications précédentes, caractérisée en ce que les premier et deuxième trous filetés (111, 112), qui se croisent perpendiculairement, sont disposés chacun au centre sur une surface principale (109a, 109b, 109c, 109d) d'un corps de borne (108) de la borne.
  6. Appareil électrique avec une tige de connexion sur laquelle une borne selon l'une des revendications précédentes est vissée.
EP18306158.9A 2018-09-03 2018-09-03 Borne de connexion et appareil électrique Active EP3618191B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18306158.9A EP3618191B1 (fr) 2018-09-03 2018-09-03 Borne de connexion et appareil électrique
US16/555,440 US10923838B2 (en) 2018-09-03 2019-08-29 Connecting terminal and electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18306158.9A EP3618191B1 (fr) 2018-09-03 2018-09-03 Borne de connexion et appareil électrique

Publications (2)

Publication Number Publication Date
EP3618191A1 EP3618191A1 (fr) 2020-03-04
EP3618191B1 true EP3618191B1 (fr) 2022-03-09

Family

ID=63528674

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18306158.9A Active EP3618191B1 (fr) 2018-09-03 2018-09-03 Borne de connexion et appareil électrique

Country Status (2)

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US (1) US10923838B2 (fr)
EP (1) EP3618191B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3618191B1 (fr) * 2018-09-03 2022-03-09 Nexans Borne de connexion et appareil électrique

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GB1422935A (en) * 1971-11-22 1976-01-28 Bicc Ltd Electric connectors
DE2228088C2 (de) 1972-06-09 1979-04-05 Karl Pfisterer Elektronische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart Klemme zum Verbinden von wenigstens zwei Rund- oder Sektorleitern mit einem AnschraBbolzen eines Transformators
US4213669A (en) * 1978-09-11 1980-07-22 Gte Sylvania Wiring Devices Incorporated Terminal collar
US7229325B1 (en) * 2005-07-29 2007-06-12 Ilsco Corporation Submersible electrical connector
US7625252B2 (en) * 2006-07-25 2009-12-01 Ilsco Corporation Submersible electrical connector
US20090163087A1 (en) * 2007-12-21 2009-06-25 Ilsco Corporation Stud connector and related methods
US20110237140A1 (en) * 2010-03-23 2011-09-29 Cerasale Eric J Combination grounding rod bridge assembly
US8277263B1 (en) * 2011-06-09 2012-10-02 Bridgeport Fittings, Inc. Intersystem grounding bridge
US8747170B2 (en) * 2012-05-02 2014-06-10 Tyco Electronics Corporation Connector assemblies and systems and methods for forming disconnectable joint assemblies
JP5973334B2 (ja) * 2012-12-11 2016-08-23 ナブテスコ株式会社 端子接続継ぎ手および端子台
US9472868B2 (en) * 2013-09-25 2016-10-18 Thomas & Betts International Llc Permanent ground point for splicing connectors
TWM490653U (en) * 2014-04-16 2014-11-21 Switchlab Inc Switch wiring terminal seat structure
US9246290B1 (en) * 2014-07-14 2016-01-26 Dongguan Smartpool Prodwcts Incorporated Co Ltd Swivel cord-connector
US9419352B2 (en) * 2014-07-23 2016-08-16 GE Lighting Solutions, LLC Terminal block with ground strap, spring force terminals, and screw lug terminal
US10096935B2 (en) * 2016-06-30 2018-10-09 Power Temp Systems, Inc. Electrical connector adapted for portable power distribution systems
EP3618191B1 (fr) * 2018-09-03 2022-03-09 Nexans Borne de connexion et appareil électrique

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Title
None *

Also Published As

Publication number Publication date
US20200099146A1 (en) 2020-03-26
US10923838B2 (en) 2021-02-16
EP3618191A1 (fr) 2020-03-04

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