EP0803934A1 - Elektrischer Leitverbinder - Google Patents

Elektrischer Leitverbinder Download PDF

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Publication number
EP0803934A1
EP0803934A1 EP97302719A EP97302719A EP0803934A1 EP 0803934 A1 EP0803934 A1 EP 0803934A1 EP 97302719 A EP97302719 A EP 97302719A EP 97302719 A EP97302719 A EP 97302719A EP 0803934 A1 EP0803934 A1 EP 0803934A1
Authority
EP
European Patent Office
Prior art keywords
cover
connector
conductor
channel
cable
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Withdrawn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
EP97302719A
Other languages
English (en)
French (fr)
Inventor
Russell Anthony Challis
Tariq Zaman
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.)
Wt Henley Ltd
Sicame UK Ltd
Original Assignee
Wt Henley Ltd
WT Henley Ltd
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 Wt Henley Ltd, WT Henley Ltd filed Critical Wt Henley Ltd
Publication of EP0803934A1 publication Critical patent/EP0803934A1/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Withdrawn legal-status Critical Current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
    • 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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2404—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation
    • H01R4/2408—Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation actuated by clamping screws
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/36—Conductive members located under tip of screw

Definitions

  • This invention relates to electrical conductor connectors and is particularly, but not exclusively, related to connectors for connecting one or more service cables to a main cable.
  • a known connector comprises a generally cylindrical connector body having a longitudinal through bore.
  • a cable core is inserted into each end of the bore and clamped with a respective clamping bolt which bites down onto the cable core in the bore.
  • a problem with this connector is that once a first cable is clamped into one end of the bore it can be difficult to bend a second cable to a sufficient degree to allow its core to be inserted into the other end of the bore.
  • a connector comprising a connector body having a bore along a first part of its length and an open channel along another part of its length. Once a first cable is clamped into the bore a second cable is laid in the open channel onto which a cover is placed to create a "bore" for the second cable.
  • the cover is slid onto the connector body direction parallel to the longitudinal axis of the connector body.
  • the cover is held onto the connector body with a resilient sleeve which is pushed laterally onto the connector body and snaps in place.
  • a disadvantage with both of these embodiments is that it is difficult to disengage a cover from its respective connector body once the cover is in place. With a longitudinal sliding fit the cover may snag on insulation present adjacent an end of the connector. With a lateral snap fit the resilience of the sleeve holds the sleeve in place against removal.
  • the invention provides an electrical conductor connector comprising a conductor receiving channel and a cover, the channel having a longitudinal axis along which the conductor is adapted to lie, the channel and the cover being adapted to fit together to enclose a part of a conductor, in which at least one engagement surface on the channel and at least one engagement surface on the cover are brought into overlap by movement of the cover across the conductor receiving channel in a lateral direction with respect to the longitudinal axis of the channel.
  • the connector is for joining one electrical conductor to another electrical conductor.
  • the term enclose may mean that the channel and the cover extend all the way around the part of the cable. Alternatively it may mean that they extend partially around the part of the cable.
  • the invention provides a method of connecting a conductor to an electrical conductor connector comprising the steps of:
  • the part of the conductor may be a region along its length or may be at an end. In either case it may refer to exposed cable core.
  • the part of the conductor may be a cable core substantially coated with insulation.
  • the conductor is a cable.
  • the channel is defined by a floor and two side walls.
  • one engagement surface runs along a region of an inside face of one wall such that the engagement surface overlies the channel and the other engagement surface runs along an outside face of the other wall such that it does not overly the channel.
  • the cover is moved across the channel for one side wall to the other.
  • the cover has a clamping member which is adapted to clamp the conductor against the floor of the channel.
  • the clamping member is a threaded screw. In this embodiment, screwing the threaded clamping member may cause clamping of the conductor.
  • the clamping member may be a cutting screw, in which case screwing the clamping member may cause it to cut through insulation on the conductor and establish electrical contact between the conductor and the clamping member.
  • the engagement surfaces are brought into engagement by an upward movement of the cover with respect to the channel.
  • this upward movement occurs after the engagement surfaces are overlapping.
  • the upward movement is caused by the clamping member acting on the conductor. In this case engagement of the cover and channel occurs as a result of screwing the clamping member into the conductor.
  • the connector is for joining together two conductors.
  • One of the conductors may be connected to the cover.
  • the connector is a service connector for connecting a service cable to a main distribution cable.
  • the connector may join a main distribution cable to another main distribution cable.
  • the connector may be a straight or in-line connector for jointing of conductor ends.
  • the channel and cover fit together loosely. They may be caused to lock fixed with respect to one another by the action of the clamping member acting on a conductor received in the channel.
  • the clamping member is mounted on or in the cover. In such an embodiment releasing the clamping member from clamping the conductor will loosen the channel and cover into a loose fit. It may cause them to disengage.
  • the channel and the cover are conductive.
  • the channel and the cover are in electrical contact with each other.
  • external surfaces of the connector have an insulating layer.
  • Figure 1 shows a perspective view of a connector 10 having a body 12 and a cover 14.
  • the body 12 and the cover 14 fit together and define an aperture 16 through which passes a cable which lies in a channel 18.
  • the cover 14 has apertures 20, 22, 24, a threaded portion of which carry respective threaded screws 26, 28, 30.
  • the cover 14 also has an aperture 32 which is adapted to receive an end of a cable.
  • the body 12 and cover 14 each comprise integral metal parts 34, 36 which have a plastic insulating coating 38.
  • the coating covers only "external" regions of the parts 34, 36 and does not cover internal metal faces of the apertures 16 and 32 nor the threaded portions of apertures 20, 22 and 24.
  • FIG. 2 shows the connector 10 with the insulating coating 38 partly cut away to reveal screws 26, 30 and the parts 34, 36. It can be seen that the screws 26, 28, 30 are sunk in formations 40, 42 which are comprised of the insulating coating 38. This isolates the screws 26, 30 to some extent from external contact when the connector is being handled. Interlocking between parts 34, 38 can also be seen.
  • Figure 3 shows the connector 10 with the insulating layer 38 fully removed to reveal more detail of the parts 34, 36. Also the presence and relative positions of the screws 26, 28 and 30 can be seen.
  • the connector 10 is of a kind known as a service connector and is used to connect a small cable (for example a small domestic cable to supply a house) onto a large main distribution cable.
  • a small cable for example a small domestic cable to supply a house
  • the connection is made when the main cable is live and is effected without cutting the main cable.
  • the main cable is buried underground. Once excavated and stripped of insulation a three-core arrangement (for a three phase supply) is exposed.
  • the cores are each separately insulated.
  • the cores are separated and the body 12 is slid underneath an insulated core from which power is to be taken (denoted by the numeral 62).
  • the core has a central conductor 70 insulated by a layer of insulation 72.
  • the core 62 lies in the channel 18 with its insulation 72 sitting on ribs 46 which run along the channel 18.
  • the channel 18 is defined by a floor 48 and two side walls 50, 52.
  • the cover 14 is then slid across the body 12 as shown in Figure 4 from one side (in the direction denoted 66), moving in a direction from one side wall 50 to the other 52.
  • latching surfaces 54, 56 on the body 12 overlap with latching surfaces 58, 60 on the cover 14 such that pairs of latching surfaces 56 and 58, 54 and 60 overlap.
  • placing and moving the cover 14 does not have to be exclusively in a sideways manner. All that is required is that the pairs of latching surfaces are brought into proximity and a final movement of the cover 14, having a sideways component, brings the pairs of latching surfaces into correspondence. It should also be noted that there is a substantial clearance between the pairs of latching surfaces at this stage of installation and the body 12 and the cover 14 fit together loosely.
  • the screw 26 is screwed down onto the core 62.
  • the screw 26 is a cutting screw and it being screwed down has three effects. Firstly, the screw 26 clamps down on the core 62. Secondly, as the screw is screwed down further the cover 14 is forced upwardly with respect to the body 12 such that eventually the pairs of latching surfaces 56 and 58, 54 and 60 are brought into engagement. This is shown in Figure 5. Thirdly, once the latching surfaces are engaged the screw 26 cuts into the insulation 72 of the core 62 until it comes into electrical contact with the conductor 70. Therefore fully screwing down the screw 26 fixes the body 12 and cover 14 with respect to each other and the assembled connector 10 with respect to the core 62.
  • the ribs 46 When the screw 26 is tightened and clamps progressively onto and into one side of the insulation 72 the ribs bite into the other side of the insulation 72 and are forced nearly, but not quite, into contact with the conductor 70 such that the non-yielding conductor 70 is supported on the ribs 46 although not in electrical contact therewith. Without the ribs 46, the core 62 would sit on the floor 48 of the channel 18 and over the course of time the insulation 72) would flow out of the region separating the conductor 70 and the floor 48 under the action of clamping pressure over this region. As a result, over time the core 62 would become loose in the connector 10. By localising the contact (that is the ribs 46 biting into the insulation 72) the insulation 72 is not squeezed out from between the conductor 70 and the floor 48 and thus the core 62 is firmly gripped in the connector 10.
  • the small domestic cable is stripped of insulation at one end and inserted into aperture 32, and then clamped with the screw 30.
  • the small domestic cable may be clamped to the cover 14 before the cover 14 is slid onto the body 12. In this way the small domestic cable and connector 10 are electrically neutral until the screw 26 cuts fully through the insulation 72 on the core 62.
  • the core 62 is normally electrically live during connection and the screw 26 is tightened with a specially made tool having an insulated handle.
  • the parts 26, 28, 30, 34 and 36 are comprised of metal there is an electrically conductive path between each screw 26 and 28 and screw 30. Therefore, if the small domestic cable has been clamped into the cover, electrical connection between it and the conductor 70 will occur when the screw is fully tightened.
  • the insulating coating 38 keeps all of the electrically live parts insulated against contact. Accordingly the connector 10 is very safe to use.
  • Figure 6 shows the connector 10 fully installed connecting the core 62 to a small domestic cable 64.
  • a small domestic cable 64 is connected into the connector 10 via aperture 32, there is a corresponding aperture (not shown) on the other side of the cover 14 into which another cable may be clamped by screw 28. Therefore two domestic cables may be connected to the same core 62.
  • this may provide a means of connecting a cable which approaches the connector 10 from the right hand side (as viewed in Figure 6) or from the left hand side, thus allowing more flexibility in use.
  • the invention provides a connector having rapid and easy disconnection as well as installation.
  • FIG. 7 An alternative embodiment of the invention is shown in Figure 7.
  • This shows an in-line connector 80 having a body 82 and a cover 84.
  • the body 82 and cover 84 fit together by means of engagement surfaces which operate in an manner similar to the embodiment described above.
  • the connector 80 is for connecting the ends of cables (for example main distribution cables) together. With the cover removed an end of each cable is placed in opposite ends of a channel 86 lying along the length of the body 82 and the cover 84 placed on the body 82. Tightening of clamping screws 88, 90 causes the body 82 and cover 84 to engage and lock.
  • the clamping screws cut through insulation on the cables and establish electrical connection in the same manner as the embodiment described above.
  • FIG 8. Another embodiment of the invention is shown in Figure 8. This shows a connector 100 for joining two main cables together, a so-called "branch" joint.
  • the principles of inserting cables into a body 102, applying a cover 104, tightening clamping screws 106 and establishing electrical contact are similar to those described above.

Landscapes

  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP97302719A 1996-04-26 1997-04-21 Elektrischer Leitverbinder Withdrawn EP0803934A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9608654 1996-04-26
GB9608654A GB2312564B (en) 1996-04-26 1996-04-26 Electrical conductor connectors

Publications (1)

Publication Number Publication Date
EP0803934A1 true EP0803934A1 (de) 1997-10-29

Family

ID=10792686

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97302719A Withdrawn EP0803934A1 (de) 1996-04-26 1997-04-21 Elektrischer Leitverbinder

Country Status (3)

Country Link
EP (1) EP0803934A1 (de)
AU (1) AU727415B2 (de)
GB (1) GB2312564B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969555A3 (de) * 1998-06-30 2001-05-02 W.T. Henley Limited Elektrischer Verbinder
WO2025188975A1 (en) * 2024-03-06 2025-09-12 Hubbell Incorporated Multi-tap mechanical shear bolt insulation piercing connectors

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU783805B2 (en) * 1999-08-24 2005-12-08 Tappat Engineering Pty Limited Electrical cable piercing connector
WO2001015276A1 (en) * 1999-08-24 2001-03-01 Tappat Engineering Pty Limited Electrical cable piercing connector
JP5559615B2 (ja) * 2010-06-16 2014-07-23 パナソニック株式会社 接続器
DE102014221347A1 (de) * 2014-10-21 2016-04-21 Te Connectivity Germany Gmbh Anordnung zur Verbindung zweier elektrischer Leiter
CN106410433B (zh) * 2016-11-18 2018-11-16 杭州海兴电力科技股份有限公司 穿刺线夹

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE565745C (de) * 1931-06-17 1932-12-06 Siemens Schuckertwerke Akt Ges Abzweigklemme fuer elektrische Leitungen
DE2736786A1 (de) * 1977-08-16 1979-03-01 Felten & Guilleaume Carlswerk Loesbare verbindung von kabelleitern mit leiterschienen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1183608A (en) * 1967-05-24 1970-03-11 Thomas & Betts Corp Formerly K Electrical Connectors
JP2613293B2 (ja) * 1989-04-25 1997-05-21 北川工業 株式会社 クランプ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE565745C (de) * 1931-06-17 1932-12-06 Siemens Schuckertwerke Akt Ges Abzweigklemme fuer elektrische Leitungen
DE2736786A1 (de) * 1977-08-16 1979-03-01 Felten & Guilleaume Carlswerk Loesbare verbindung von kabelleitern mit leiterschienen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0969555A3 (de) * 1998-06-30 2001-05-02 W.T. Henley Limited Elektrischer Verbinder
AU759520B2 (en) * 1998-06-30 2003-04-17 W.T. Henley Limited Electrical connector
WO2025188975A1 (en) * 2024-03-06 2025-09-12 Hubbell Incorporated Multi-tap mechanical shear bolt insulation piercing connectors

Also Published As

Publication number Publication date
AU1907197A (en) 1997-10-30
AU727415B2 (en) 2000-12-14
GB9608654D0 (en) 1996-07-03
GB2312564A (en) 1997-10-29
GB2312564B (en) 2001-02-14

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