EP3618191A1 - Borne de connexion et appareil électrique - Google Patents

Borne de connexion et appareil électrique Download PDF

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Publication number
EP3618191A1
EP3618191A1 EP18306158.9A EP18306158A EP3618191A1 EP 3618191 A1 EP3618191 A1 EP 3618191A1 EP 18306158 A EP18306158 A EP 18306158A EP 3618191 A1 EP3618191 A1 EP 3618191A1
Authority
EP
European Patent Office
Prior art keywords
clamp
threaded hole
conductor
terminal
bolt
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.)
Granted
Application number
EP18306158.9A
Other languages
German (de)
English (en)
Other versions
EP3618191B1 (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 terminal for connecting a conductor to a connecting part, in particular to a connecting bolt of an electrical apparatus, for example a transformer.
  • the invention relates to an electrical apparatus with a connecting bolt onto which a clamp according to the invention is screwed.
  • connection bolts to which electrical lines are connected, the connecting bolts in many cases being designed as threaded bolts.
  • connection bolts can be found, for example, on the low-voltage side of transformers.
  • Electrical cables are often connected to the connecting bolts with screw terminals.
  • a terminal for connecting a conductor to a connecting pin of a transformer is known.
  • the clamp is designed so that the cables are led away at right angles with respect to the longitudinal axis of the connecting bolt. This means that with a connection bolt oriented in the vertical direction, the lines are led away in the horizontal direction.
  • a different type of connection terminal is required. This means that at least two different types of clamps must be provided.
  • the invention proposes, according to a first aspect, a clamp for connecting a conductor to a connecting bolt of an electrical apparatus, which is provided with an external thread.
  • the clamp is characterized in that the clamp has a first and a second threaded hole, which intersect at right angles.
  • the internal threads of the first and second threaded holes match the external thread of the connection bolt.
  • the terminal can be screwed onto the connecting bolt in two different orientations.
  • the clamp 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 structure of the terminal enables one or more conductors to be connected in two different orientations with respect to the longitudinal axis of the connecting bolt.
  • the clamp is therefore suitable for different installation positions, so that there is no need to keep different clamps available for different installation positions.
  • the threaded hole, into which the connecting bolt is not screwed allows an inspection of the correct mounting of the terminal on the connecting bolt.
  • the free threaded hole can be used to attach another connection bolt, for example for a ball bolt.
  • the clamp has a second pressure screw, which is screwed into the same threaded hole as the connection bolt, but in the opposite direction to the connection bolt. This pressure screw clamps the clamp on the connecting bolt without additional means being necessary for this, in particular no second pressure screw is necessary for this.
  • the conductor channel has grooves and / or projections.
  • the structured inner surface of the conductor channel creates a high contact pressure for one in the Conductor channel recorded conductor, so that any oxide layers on the surface of the conductor are broken up and good electrical contact is generated.
  • 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 lines to be connected to the terminal.
  • the conductor channels are arranged on the left and right of one of the two threaded holes. This configuration has proven to be particularly space-saving and useful during assembly.
  • the first and the second threaded hole which intersect at right angles, 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 on which a clamp 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 shows a perspective view of an embodiment of a clamp according to the invention, which is designated as a whole with the reference numeral 100.
  • a connection bolt 101 for an electrical apparatus is shown below the clamp 100, which is provided with an external thread 102. Only part of a housing 103 of the electrical apparatus is shown and schematically indicated by 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 accordingly is the transformer housing.
  • a specific exemplary embodiment can be the low-voltage side of a transformer which is equipped with bushings in accordance with DIN EN 50386.
  • the invention is not limited to this type of connection 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.
  • the clamp body 108 accordingly comprises a first main surface 109a and an opposite second main surface 109b.
  • the clamp body 108 has a third main surface 109c, which is shown in FIG Figure 1 lies on top and a fourth main surface 109d, which lies opposite the third main surface 109c.
  • a first threaded hole 111 arranged centrally 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 arranged centrally in the middle of the third or fourth main surface. Accordingly, the first and the second threaded hole 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 receives a pressure screw 117. With the pressure screw 117 it is consequently possible to clamp a conductor inserted into the conductor channel 113 in the clamp body 108.
  • a threaded hole 118 is provided in the third main surface 109c, which opens into the second conductor channel 114 and which receives a pressure screw 119 with which a conductor inserted into the conductor channel 114 can be clamped in the clamp body 108.
  • a further pressure screw 121 is screwed into the second central threaded hole 112, the function of which in connection with Figure 2 is explained.
  • Figure 2 shows the terminal 100 screwed onto the connecting bolt 101.
  • the connecting bolt 101 is screwed into the second central threaded hole 112 so far that the connecting bolt 101 projects approximately into 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 clamp the terminal body 108 with the connection bolt 101 and simultaneously one 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 to achieve mechanical tensioning on the connection bolt.
  • the first central threaded hole 111 enables a visual inspection by an assembly person to check whether the clamp 100 is screwed onto the connecting bolt 101 far enough or too far.
  • the inner sides of the conductor channels 113, 114 have an area which 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 lie in the conductor channels 113, 114 on the side opposite the side where the pressure screw 117 or 119 enters the conductor channel 113 or 114.
  • the pressure screw 117 or 119 therefore presses the conductor against the corresponding surface structure from the longitudinal ribs 122, which break up an oxide layer that may be present on the conductor and in this way promote the establishment of good electrical contact.
  • Such disruptive insulating oxide layers occur, for example, in conductors made of aluminum or aluminum alloys.
  • FIG 3 a perspective view of the clamp 100 mounted on the connecting bolt 101 is shown.
  • 2 conductors 301 and 302 are mounted in terminal 100, which are illustrated by short conductor sections.
  • An arrow V indicates Figure 3 indicates a vertical direction while an arrow H indicates a horizontal direction. This convention should apply to all figures.
  • the conductor channels 113, 114 are oriented in the horizontal direction and thereby allow easy assembly of horizontally running lines 301, 302.
  • Figure 5 shows the clamp 100 mounted on the connecting bolt 101, the conductor channels 113, 114 as in FIG Figure 3 are oriented horizontally.
  • the connection bolt is screwed into the second central threaded hole 112
  • a ball pin 501 is screwed into the first central threaded hole 111 in order to create further connection options for additional lines.
  • Figure 6 shows the clamp 100 mounted on the connecting bolt 101, the conductor channels 113, 114 as in FIG Figure 4 are vertically oriented. In this orientation, the connection bolt is screwed into the second central threaded hole 112. At the in Figure 6 illustrated embodiment, a ball stud 501 is screwed into the second central threaded hole 111 in order to create further connection options for additional lines.
  • 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 produce the electrical contact.
  • the proposed clamp can for example be made of copper, aluminum and their alloys as well as other electrically 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.
  • the clamp designed in this way can have advantages over the direct contact with the pressure screw for certain conductor diameters or certain cross-sectional shapes of the conductor.

Landscapes

  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
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 true EP3618191A1 (fr) 2020-03-04
EP3618191B1 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)

Country Link
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2228088B1 (de) 1972-06-09 1973-06-07 Karl Pfisterer Fabrik Elektrotechnischer Spezialartikel, 7000 Stuttgart Klemme zum Verbinden eines Rund oder Sektorleiters mit einem Anschlußteil in einer Schaltanlage
GB1422935A (en) * 1971-11-22 1976-01-28 Bicc Ltd Electric connectors
US20110237140A1 (en) * 2010-03-23 2011-09-29 Cerasale Eric J Combination grounding rod bridge assembly
US20180006399A1 (en) * 2016-06-30 2018-01-04 Ilsco Corporation Electrical connector adapted for portable power distribution systems

Family Cites Families (12)

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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1422935A (en) * 1971-11-22 1976-01-28 Bicc Ltd Electric connectors
DE2228088B1 (de) 1972-06-09 1973-06-07 Karl Pfisterer Fabrik Elektrotechnischer Spezialartikel, 7000 Stuttgart Klemme zum Verbinden eines Rund oder Sektorleiters mit einem Anschlußteil in einer Schaltanlage
US20110237140A1 (en) * 2010-03-23 2011-09-29 Cerasale Eric J Combination grounding rod bridge assembly
US20180006399A1 (en) * 2016-06-30 2018-01-04 Ilsco Corporation Electrical connector adapted for portable power distribution systems

Also Published As

Publication number Publication date
EP3618191B1 (fr) 2022-03-09
US20200099146A1 (en) 2020-03-26
US10923838B2 (en) 2021-02-16

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