EP0841717A2 - Elektrischer Verbinder - Google Patents

Elektrischer Verbinder Download PDF

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Publication number
EP0841717A2
EP0841717A2 EP97309014A EP97309014A EP0841717A2 EP 0841717 A2 EP0841717 A2 EP 0841717A2 EP 97309014 A EP97309014 A EP 97309014A EP 97309014 A EP97309014 A EP 97309014A EP 0841717 A2 EP0841717 A2 EP 0841717A2
Authority
EP
European Patent Office
Prior art keywords
sleeve member
connector according
connector
conductor
external conductor
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Withdrawn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
EP97309014A
Other languages
English (en)
French (fr)
Other versions
EP0841717A3 (de
Inventor
Iain Malcolm Strachan
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.)
CCL Systems Ltd
Original Assignee
CCL Systems 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 CCL Systems Ltd filed Critical CCL Systems Ltd
Publication of EP0841717A2 publication Critical patent/EP0841717A2/de
Publication of EP0841717A3 publication Critical patent/EP0841717A3/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Withdrawn legal-status Critical Current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
    • H01R4/2495—Insulation penetration combined with permanent deformation of the contact member, e.g. crimping

Definitions

  • the invention relates to electrical connectors.
  • the invention relates to connectors for connecting to insulated conductors for air lines.
  • insulated lines are in use and this invention is primarily (although not exclusively) directed towards forming a connection to such insulated lines.
  • the external connection to the power line is usually taken off in the form of a connection which is parallel to the main overhead line.
  • Environmental conditions often cause the lines to move around with the wind and when this occurs, chaffing can be a problem at the point of external connection.
  • an insulation piercing electrical connector comprising a sleeve member having a longitudinal opening formed therein to allow the sleeve member to be passed over an elongate insulated conductor, the connector further comprising an external conductor connection point for connecting an external conductor thereto, the connector being characterised in that the sleeve member is provided with means for piercing the insulation of the insulated conductor once the connector is in place, piercing being achieved by mechanical deformation of the sleeve member onto the insulated conductor.
  • the sleeve member is preferably U-shaped in cross-section.
  • the means for piercing preferably comprise a plurality of protrusions.
  • the protrusions may comprise U-shaped ridges longitudinally spaced apart from one another and internally arranged within the sleeve member.
  • the connector may be provided with a removable section which, when present, cooperates with the sleeve member to enable a part of the elongate insulated conductor to be completely enclosed.
  • the removable portion forms a sliding fit with a main part of the sleeve member.
  • the means for piercing the insulation of the conductor are provided on the interior of the sleeve member and comprise one or more protrusions such that as a portion of the sleeve member adjacent to a protrusion is compressed, the protrusion pierces the insulation to establish electrical connection.
  • the protrusions may be arranged longitudinally.
  • the protrusions are substantially transversely arranged and longitudinally spaced from one another along the sleeve member.
  • the sleeve member is provided with one or more external indentations, so that a compression tool may be fitted externally to the sleeve member and located on said indentation or indentations.
  • the or each external indentation has a corresponding internal protrusion in radial alignment with it with respect to a central longitudinal axis of the sleeve member.
  • the compression force acts via the or each indentation to force the or each protrusion through said insulation.
  • the removable portion is connected to the main part of the sleeve member by means of a groove and tongue type fitting.
  • the groove and tongue type fitting may comprise one or more tongues formed in the removable portion for cooperation with one or more grooves formed in the main part of the sleeve member.
  • this groove and tongue configuration could be reversed so that the tongue is on the main part of the sleeve member and the groove is on the removable portion.
  • the tongue and groove connection is in the form of a dove-tail connection.
  • the sleeve member is of constant cross-section throughout the major part of its length, said internal protrusion or protrusions and external indentation or indentations also being provided along the major portion of the sleeve members length.
  • the external conductor connection point extends substantially at right angles to the sleeve member.
  • the indentations and protrusions extending along a major portion of the sleeve members length.
  • the external conductor connection point and sleeve member form a T-type connection.
  • the external conductor connection point also comprising a sleeve like member into which an external conductor may be connected by compression.
  • Compression of the external conductor connection point may be carried out on-site or, alternatively, the external conductor may be pre-connected to the connection point.
  • the external conductor may comprise a spark arrester element, such as a spark arrester horn.
  • the external conductor includes an enlarged portion which, during the compression operation, is trapped within the external conductor connection point. Trapping of the conductor in this way may be arranged so as to allow the external conductor to be rotated with respect to the connection point, but not to allow the conductor to be withdrawn therefrom.
  • the electrical connector When the external conductor is a spark arrester element, the electrical connector provides an arc-protection device for the insulated conductor.
  • the connector can be offered up to the insulated conductor without needing to cut the insulated conductor.
  • the connector comprises a sleeve member 1 having a removable portion 2 attached by means of a tongue and groove type connection 3 so that the removable portion 2 is a sliding fit with a main part 4 of the sleeve member 1.
  • the removable portion 2 has a longitudinally extending indentation 5 which may extend along the whole length of the removable portion.
  • the sleeve member connects to a external conductor connection point 6 and joins with it at right angles.
  • the connection point 6 is adapted to receive either an electrical conductor in the form of an electrical lead or items such as a spark arrester horn 7 therein.
  • the connection point 6 is joined to the sleeve member 1, for instance, by a butt welding operation.
  • protrusions or indentations 5 Whilst the embodiment of Figure 2 shows a single longitudinally extending protrusion or indentation 5 formed on the removable portion 2, it will be appreciated that a plurality of such protrusions or indentations 5 may be provided extending in the longitudinal direction and radially spaced from one another to improve connection to the conductor. Also, it will be appreciated that whilst these protrusions of indentations 5 are shown as being formed on the removable portion, they may alternately be formed on the main part 4 of the sleeve member 1. Also, instead of running longitudinally, transversely arranged protrusions or indentations 5 may be provided longitudinally spaced from one another along the length of the sleeve member 1.
  • the removable portion 2 is first removed.
  • the connector may be then be offered up to the overhead line and the overhead line received within the main portion 4 of the sleeve member.
  • the removable portion With the sleeve member sitting in the main part 4 of the sleeve member, the removable portion may then be connected therewith by sliding it onto the main part 4, by means of the tongue and groove fittings 3. Performing this operation makes a loose connection with the insulated conductor.
  • the sleeve member 1 In order to pierce the insulation of the conductor the sleeve member 1 must be radially compressed so that indentation 5 pierces the insulation layer of the conductor and makes an electrical connection therewith. The connector is then secure on the overhead line.
  • the spark arresting horn 7, or conductor as required, may be attached to the external connection point by inserting it therein and then performing another compression operation.
  • the conductor/spark arrester horn has an enlarged head which, during the compression operation upon the external connection point, is trapped within the connection point 6, so as to prevent withdrawal but allowing rotation of the conductor/spark arrester horn with respect to it.
  • the sleeve member 1 of Figure 3 has a main part 4 and a removable portion 2 which are connected to one another by tongue and groove connections such as dove-tail joints 8.
  • the sleeve member of Figure 3 is not of a substantially circular cross-section but instead features internal protrusions 9 and external indentations 10.
  • the insulated conductor is introduced into the sleeve member in similar fashion to that required of the Figure 1 and 2 embodiment, i.e. removable section 2 is removed and the main part 4 of the sleeve member placed around the insulated conductor prior to replacing the removable section 2.
  • the particular cross-sectional shape of the sleeve member 1 is chosen so that an external compression tool may be located upon the indentations 10 and as the tool compresses the sleeve member 1, protrusions 9 bite into the insulation of the insulated conductor so as to pierce it.
  • Each indentation 10 has a corresponding protrusion 9 which is radially aligned therewith with respect to a central longitudinal access of the sleeve member. In this manner, as the compression occurs force is directed efficiently through each indentation 10 into its corresponding protrusion 9.
  • the indentations and protrusions may extend along a full length of the sleeve member 1.
  • FIG 4 shows a typical application of the device in schematic form.
  • insulated overhead conductors 11 to 13 are shown connected to a pylon 14 with a transformer 15 at the base thereof.
  • a pair of electrical connection devices are shown each being connected to a respective overhead cable 11 and 12.
  • the Figure also shows what is known as a "spill takeoff" connected to the electrical connection devices and leading down to transformer 15.
  • Such spill takeoffs may be attached by providing a conductor 16, 17 from the transformer 15 and clamping the end of the conductor 16, 17 to the spark arrester horns 7 of the devices.
  • Attachment of the conductors 16, 17 to the spark arrester horns 7 may be achieved by a clamp connection, the clamp being actuated by an operative having an insulated rod 18 which connects with a bolt or similar part 19 of a clamping member 20.
  • the clamping member may be offered up to the spark arrester horn 7 by the operative holding the insulated rod 18 and attaching the spark arrester horn by the operative rotating the rod 18 until the clamp is tightly connected to the spark arrester horn.
  • the connector of Figures 5 to 7 comprises an elongate sleeve member 21 of essentially U-shaped cross-section having a plurality of longitudinally spaced apart transversely extending indentations or protrusions 22 to 24.
  • An external conductor connection point 25 is provided and this is shown in the form of a hollow tube into a cavity 26 of which an external conductor of the type 7 shown in Figure 1 may be introduced.
  • the external conductor connection point 25 is a compression fixing, so that once an external conductor such as the spark arrester horn 7 has been introduced into the opening 26 the compression fixing may be compressed using a standard compression tool so as to trap the spark arrester horn 7 therein. As with the other embodiments, this compression operation may be arranged to trap an enlarged end of the horn 7 therein, but to allow the horn 7 to freely rotate with respect to the connection point 25.
  • the sleeve member 21 is offered up to the overhead line and the insulated conductor of the overhead line is fed into opening of the essentially U-shaped cross-section of the sleeve member 21. Then, in contrast to the first and second embodiments described above, instead of adding a removable portion to completely enclose the insulated conductor within the sleeve, the sleeve 21 is simply compressed using a compression tool. The compression of the sleeve 21 causes the protrusions 22 to 24 to bite into the insulation surrounding the conductor and make a connection with the conductor inside the insulation of the overhead line. It will be appreciated that the compression operation causes the U-shaped cross-section to deform and wrap around the insulated conductor to a certain degree so that the connection to the overhead line is stable.
  • FIGS 8 and 9 show two further embodiments of electrical connector.
  • the external conductor connection point 25 comprises a flat plate having a pair of apertures 27, 28 formed therein which are tapped to receive a screw or similar. By means of the threaded apertures 27, 28 an external conductor may be connected or clamped directly to the connector.
  • Figure 9 is very similar to that of Figure 8 except that the protrusions 22-24 are arranged to run longitudinally within the sleeve member 21.
  • FIG 10 there is illustrated how a compression tool may be used to compress a sleeve member of the types shown in Figures 5 to 9.
  • the compression tool 29 has an internal cavity 30 of complimentary form to the external formation of the sleeve member 21 of the electrical connector.
  • pressure is applied from four points A, B, C and D so as to force the sleeve member to close up around the insulated conductor and urge the protrusions 22-24 through the insulation into contact with the conductor.

Landscapes

  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP97309014A 1996-11-09 1997-11-10 Elektrischer Verbinder Withdrawn EP0841717A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9623361 1996-11-09
GBGB9623361.4A GB9623361D0 (en) 1996-11-09 1996-11-09 Electrical connector

Publications (2)

Publication Number Publication Date
EP0841717A2 true EP0841717A2 (de) 1998-05-13
EP0841717A3 EP0841717A3 (de) 1999-03-31

Family

ID=10802708

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97309014A Withdrawn EP0841717A3 (de) 1996-11-09 1997-11-10 Elektrischer Verbinder

Country Status (2)

Country Link
EP (1) EP0841717A3 (de)
GB (1) GB9623361D0 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1277975B (de) * 1960-10-25 1968-09-19 Alois Schiffmann Dipl Kfm Klemme fuer die parallele Verbindung von Kabeln mit verschiedenen Durchmessern
DE1665363A1 (de) * 1967-04-14 1970-12-10 Pfisterer Elektrotech Karl Pressklemme fuer elektrische Leiter
US3668613A (en) * 1970-01-22 1972-06-06 John J Klosin Electrical connector
US3798347A (en) * 1971-01-11 1974-03-19 Post Office Improvements in or relating to a crimping clip for electrically connecting together electrical conductors
EP0263325A2 (de) * 1986-10-07 1988-04-13 Vossloh Schwabe GmbH Elektrische Verbindungs- oder Anschlussklemme
US5210676A (en) * 1991-03-13 1993-05-11 Mashikian Matthew S Electrical protective device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1277975B (de) * 1960-10-25 1968-09-19 Alois Schiffmann Dipl Kfm Klemme fuer die parallele Verbindung von Kabeln mit verschiedenen Durchmessern
DE1665363A1 (de) * 1967-04-14 1970-12-10 Pfisterer Elektrotech Karl Pressklemme fuer elektrische Leiter
US3668613A (en) * 1970-01-22 1972-06-06 John J Klosin Electrical connector
US3798347A (en) * 1971-01-11 1974-03-19 Post Office Improvements in or relating to a crimping clip for electrically connecting together electrical conductors
EP0263325A2 (de) * 1986-10-07 1988-04-13 Vossloh Schwabe GmbH Elektrische Verbindungs- oder Anschlussklemme
US5210676A (en) * 1991-03-13 1993-05-11 Mashikian Matthew S Electrical protective device

Also Published As

Publication number Publication date
GB9623361D0 (en) 1997-01-08
EP0841717A3 (de) 1999-03-31

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