EP0285079A2 - Dispositif de serrage pour la réalisation d'une dérivation sur les conducteurs d'un câble de tension et réalisation d'une telle dérivation - Google Patents

Dispositif de serrage pour la réalisation d'une dérivation sur les conducteurs d'un câble de tension et réalisation d'une telle dérivation Download PDF

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Publication number
EP0285079A2
EP0285079A2 EP88105015A EP88105015A EP0285079A2 EP 0285079 A2 EP0285079 A2 EP 0285079A2 EP 88105015 A EP88105015 A EP 88105015A EP 88105015 A EP88105015 A EP 88105015A EP 0285079 A2 EP0285079 A2 EP 0285079A2
Authority
EP
European Patent Office
Prior art keywords
branch
clamping device
main
cable
terminal
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
EP88105015A
Other languages
German (de)
English (en)
Other versions
EP0285079B1 (fr
EP0285079A3 (en
Inventor
Horst Lössner
Manfred Behrens
Michael Lipprandt
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.)
RXS Schrumpftechnik Garnituren GmbH
REMA Lipprandt GmbH and Co KG
Original Assignee
RXS Schrumpftechnik Garnituren GmbH
REMA Lipprandt GmbH and Co KG
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 RXS Schrumpftechnik Garnituren GmbH, REMA Lipprandt GmbH and Co KG filed Critical RXS Schrumpftechnik Garnituren GmbH
Priority to AT88105015T priority Critical patent/ATE82649T1/de
Publication of EP0285079A2 publication Critical patent/EP0285079A2/fr
Publication of EP0285079A3 publication Critical patent/EP0285079A3/de
Application granted granted Critical
Publication of EP0285079B1 publication Critical patent/EP0285079B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H01R4/70—Insulation of 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
    • 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
    • H01R4/34—Conductive members located under head 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
    • 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
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections

Definitions

  • the invention relates to a clamping device for producing a branch on the main conductors of a live voltage cable with a main terminal that can be placed on the uncut main conductor, which preferably has a milling screw for penetrating the insulation of the respective main conductor and a push-on molded body for the longitudinal closure of the receiving channel and also with a branch terminal for receiving the end of a branch conductor, which contains a pressure screw for contacting, all electrical contact parts being accommodated in an insulating housing.
  • Clamping devices for connecting branch conductors to continuous main conductors are generally known.
  • there are various problems when connecting which pose considerable difficulties. So far, the potentials on the main conductors had to be switched off when producing individual feeders, since there was insufficient protection against accidental contact during assembly work.
  • Cast resin was generally used here, which was poured into the cavities and allowed to harden. Pouring out the cavities was also important for mechanical reasons, since there was a risk of the sleeve collapsing in the event of external loads on the outer sleeves, such as, for example, due to earth loads on the cables laid in the ground.
  • Cable branch terminals have recently also been proposed, the contact parts of which are embedded within cavities of a dimensionally stable plastic, so that the assembly work can also be carried out on the live conductors.
  • the disadvantage here is that there are no seals against the ingress of moisture and the like in such clamping devices.
  • the task for the present invention is to provide a clamping device for the production of a branch on voltage cables, with which the branch conductors or shield conductors can be connected without potential disconnection on the main conductors or main cores to be branched off, the subsequent sealing of the branch point and the mechanical protection against external forces must be as simple and quick to manufacture.
  • a particular advantage of the invention lies in the fact that the individual branches per main conductor can be produced under tension of the main cable, since due to the present design of the clamping devices there are no live parts that would represent a source of danger for the fitter.
  • Further advantages result from the use of shrinkable components on the clamping devices, since it is now possible to create a sealed and insulated branch point, it being possible to dispense with the previously customary filling of cavities with correspondingly mixed masses.
  • the heat-shrinkable components nestle so closely to the components underneath - here the clamping devices - that there is no longer any danger of a cavity collapse due to the influence of commercially available devices.
  • the full insulation of the clamping devices and the covering with the protective devices according to the invention provide adequate electrical protection to the outside, so that the use of fillers and insulating agents can also be omitted for this reason.
  • the basic bodies of the individual terminal parts are already made of plastic and thus enable the branch to be manufactured without voltage disconnection.
  • the use of an insulated tool is only necessary for the last contacting process, milling the insulation on the main conductor using a milling screw. All other work can be carried out without hesitation.
  • each individual branch terminal and each main terminal is surrounded and sealed with a shrinkable molded part. Finally, a common external protection in the form of a further shrinking part is then placed around the entire branch point and shrunk on in a sealing manner.
  • FIG. 1 now illustrates the clamping device 1 with which one branch can be produced per cable conductor. It is particularly advantageous that the clamping device 1 is completely electrically insulated from the outside, so that no electrical potential can occur on the outer surfaces.
  • the following main parts are necessary, the main terminal 2 for contacting the main wire 14, the branch terminal 5 for contacting the branch wire 16, the connecting rail 4 guided in the connecting web 13 between the two terminal parts and the Protective devices against environmental influences.
  • the main terminal 2 is, for example, approximately C-shaped in the base body, that is to say it has a lateral opening 6 through which the main conductor 14 to be contacted, but initially insulated, is inserted into the receiving channel 26 from the side.
  • This has the advantage that the base region of the receiving channel 26 is firmly connected as a counter bearing 7 to the base body of the main terminal and thus mechanically counteracts the contact pressure required when contacting.
  • This is further reinforced by an undercut end 24, which includes the counter bearing 7, of the shaped body 3 explained later, by means of which the otherwise free C-leg is prevented from being cushioned.
  • This embodiment ensures that a branch can be made without separating the main wire. However, it is usually the case that the clamping device 1 is placed onto the main conductor 14 from the side.
  • the receiving channel 26 of this main terminal 2 is one end of the busbar 4, in which the contact screw 10 is screwed.
  • spring elements 11 are advantageously introduced, for example spring washers, with which a possibly occurring drop in contact pressure due to cold material flow can be compensated.
  • the lower part of the C-shaped base part of the main terminal 2 is designed as a counter bearing 7 for the introduced main conductor 14 and in such a way that the main conductor 14 lies as well as possible in order to avoid lateral sliding when contacting.
  • a further improvement of the support in the counter bearing 7 is given in that a metallic insert, for example a sector-shaped metal plate, is inserted into this area, the radius of curvature of which, however, is greater than that of the counter-bearing 7.
  • This metal plate can expediently be provided with non-slip elevations or profiles, through which the insulated main conductor 14 is better fixed.
  • the lateral opening 6 is at least so wide that the corresponding main conductor 14 with insulation 15 can be inserted.
  • the lateral introduction of the main conductor 14-15 is particularly easy to assemble, since immediately upon introduction into the receiving channel 26 there is guidance on all sides - apart from the opening 6.
  • the lateral placement of the molded body 3 closing the opening 6 can take place completely freely and without pressure, since the main conductor 14-15 is already guided.
  • the molded part 3 is not stressed in this assembly phase and can therefore be used particularly easily, but the longitudinal joints should be as narrow as possible and, for example, be less than 2 mm.
  • the two ends of the C-shaped base part have oppositely formed lugs 8 which are bent outwards so that they each form a longitudinal undercut 9.
  • an elongated shaped body 3 adapted to the contours of the C-shaped basic body 3 is pushed over this lateral opening 6, this shaped body 3 having undercut ends 24 adapted to the lugs 8, which lugs 8 to reach into the groove formed by the undercuts 9.
  • This molded body 3 can either be designed as a rigid slide-on body or as a resilient latching body. In this way, a closed enclosure is produced around the main conductor 14 in the region of the branching point, with actuation of the contact screw 10 and thus contacting the main conductor 14 not yet taking place. In this assembled state, however, the clamping device 1 is already fixed in the final position, that is to say the branch clamp 5 is already in its position fixed.
  • This branch terminal 5 now also consists of a tubular plastic body, in the receiving channel 17 of which the potential-conducting busbar 4 is guided.
  • a clamping screw 12 is screwed into this busbar 4, with which the electrical contact is made to the stripped end of the branch conductor 16. Since here, in contrast to the continuous main conductor 14, one end of the conductor can be stripped of this free end without further ado. In this way, you only need a normal clamping screw, while preferably a milling screw 10 must be provided for the contacting of the main conductor 14 to be carried out later, with which the electrical contact is made through the conductor insulation.
  • the receiving channel 17 is also essentially again adapted to the shape of the branch conductors 16, so that the best possible contact surfaces for pressure distribution during contacting are achieved. Furthermore, the receiving channel 17 of the branch terminal 5 is designed as a blind hole, that is, its back is closed, so that it is sealed on this side. In addition, faulty contacts cannot be made on this side due to a branch conductor that is accidentally inserted too far. Since no electrical contact has been made on the main conductor 14 up to this point, the branch conductor 16 can continue to be firmly connected in the branch terminal 5 without any risk.
  • FIG. 2 shows a branch point for a cable conductor, as was described in detail in FIG. 1.
  • the branch terminal 5 is firmly connected side by side via the insulated connecting web 13 with the main terminal 2, so that there is a single composite body made of plastic in which the electrical parts are fully embedded.
  • the connecting web 13 is angled, for example, as shown in FIG. 1, so that the closest possible adaptation to the peripheral region of the cable to be contacted is thereby possible.
  • the main terminal 2 with the molded body 3 pushed on or snapped on is designed as a through element and the branch terminal 5 as an element closed on one side.
  • the course of the busbar 4 is shown in dashed lines, which is indicated in isolation within the base body of the terminals made of non-conductive plastic.
  • the contact screws 10 and 12 designed as Allen screws are shown.
  • the main conductor 14-15 is passed through the main terminal 2 in an insulated form, while the end of the branch conductor 16 is removed from its insulation 20 and inserted into the blind hole of the branch terminal 5.
  • the insertion areas of the clamping device 1 are provided, for example, with shrinkable elements which ensure the required sealing in the shrunk-on state.
  • a shrink tube piece 18 is applied, which, after contacting the branch conductor 16, is pushed onto the branch terminal 5 as far as it will go and finally shrunk on, the length of the shrink tube piece 18 having to be selected such that the required seal lengths , for example 2 cm, on the branch conductor and branch terminal 5.
  • This part of the clamping device 1 is thus completely sealed, since the rear of the branch clamp 5, which is designed as a blind hole, is closed.
  • a further piece of shrink tubing is placed, this piece of shrink tubing being designed as a longitudinally divided sleeve 19 which must be placed over the undivided main conductor 14-15.
  • a recess 23 is provided in the sleeve 19, which is formed either as an opening or as an incision from the closure.
  • the sleeve 19 is provided with a laterally extending longitudinal closure, not shown here, which has, for example, longitudinal flanges, over which a corresponding closure rail is slid in the manner known per se.
  • this sleeve 19, which is advantageously provided with an inner coating of a hot-melt adhesive, sits tightly on the main terminal 2 and the insulated main conductor 14-15, so that there is an overall tight seal of the clamping device 1; these entire processes could take place without switching off the potential on the main conductor 14.
  • FIG. 3 now shows how, with the aid of the clamping devices 1 according to the invention, a branch can be installed as space-saving as possible in the case of a cable consisting of four separately insulated cable conductors 14-15, for example a 1 kV voltage cable.
  • the correspondingly guided bending of the connecting web 13 between the main terminal 2 and the contact terminal 5 permits an almost circular arrangement of the four clamping devices 1 around the cable. So you just have to remove the cable sheath in the branch area and bend the separately insulated main conductors 14-15 to the extent that the main terminals 2 can be placed on the main conductors 14-15 in the manner described above.
  • two different embodiments of clamping devices 1 are used for a particularly space-saving arrangement, but they only differ in that the respective branch terminal 5 on the main terminal 2 is arranged in mirror image on the other side.
  • two different types of clamping devices 1 must be used if the branch conductors are led away in one direction wants to execute.
  • Such a branch point can also be implemented with a single type of clamping device, in which case a branch conductor is then removed between a main conductor.
  • This branch point is then slightly larger in diameter, since here a longitudinal offset of the clamping devices, as is the case with the version described above, makes little sense.
  • the design of the individual clamping devices is, apart from the mirror-image attachment of the branch terminal, completely the same.
  • FIG. 4 a completely assembled branch point with clamping devices 1 according to the invention is shown in a partial cross section.
  • a three-phase HK main cable is selected, in which branches are made on the main conductors separated from the cable sheath, but separately insulated, 14-15.
  • a shrunk sleeve 19 is used per main conductor branch, in which the branch 4-13 is made via the recess 23.
  • the branch conductor 16-20 is then sealed to the branch clamp of the clamping device by the shrunk-on shrink tube piece 18. This means that each conductor branch is individually sealed and protected.
  • the entire branch point is then surrounded by a shrink sleeve 22, known per se, and shrunk onto the cable sheath of the main cable HK in a sealing manner on one side of the branch point.
  • the sleeve 22 is designed as a branch sleeve with two exits.
  • the resulting gusset area between the main cable HK and the branch cable AK is sealed with a sealing insert 21, for example with an insert made of a plastic, sticky plastic mass.
  • the shrink sleeve 22 is advantageously provided with an inner coating made of a hot melt adhesive, as a result of which the sealing effect on the sealing surfaces can be increased.
  • This shrink sleeve 22 is also of a length not visible here provided with a closure so that they can be laid over the uncut HK main cable.
  • the entire branch point is thus surrounded on the outside with a protective device against environmental influences.
  • the branch point is provided with a support body, for example a tubular structure which can be deformed in diameter and at the ends, before the shrink sleeve is applied.
  • the shrink sleeve can then be shrunk particularly well onto this support body, the support body offering additional protection.
  • branch points it does not matter what the number of cable conductors to be branched, since each branch can be carried out on its own.
  • the execution direction of the branch conductors can be chosen arbitrarily, since the application of the clamping device is indifferent in itself. Additional variants can be produced through mirror-image modifications.
  • reference is made to the fact that an embodiment with multiple branches is also possible if, for example, a second branch terminal is attached in the opposite direction to the branch terminal previously described. An additional branching of the connecting rail is then necessary for this. This also gives the possibility of choosing the branch direction in a simple manner, since it is now irrelevant from which side the branch conductor is inserted.

Landscapes

  • Cable Accessories (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Processing Of Terminals (AREA)
EP88105015A 1987-03-30 1988-03-28 Dispositif de serrage pour la réalisation d'une dérivation sur les conducteurs d'un câble de tension et réalisation d'une telle dérivation Expired - Lifetime EP0285079B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88105015T ATE82649T1 (de) 1987-03-30 1988-03-28 Klemmvorrichtung zur herstellung eines abzweiges an leitern eines spannungskabels und herstellung eines solchen abzweiges.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3710546 1987-03-30
DE3710546 1987-03-30

Publications (3)

Publication Number Publication Date
EP0285079A2 true EP0285079A2 (fr) 1988-10-05
EP0285079A3 EP0285079A3 (en) 1990-03-21
EP0285079B1 EP0285079B1 (fr) 1992-11-19

Family

ID=6324380

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88105015A Expired - Lifetime EP0285079B1 (fr) 1987-03-30 1988-03-28 Dispositif de serrage pour la réalisation d'une dérivation sur les conducteurs d'un câble de tension et réalisation d'une telle dérivation

Country Status (3)

Country Link
EP (1) EP0285079B1 (fr)
AT (1) ATE82649T1 (fr)
DE (1) DE3875994D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263824A (en) * 1992-01-27 1993-08-04 British Gas Plc An electrical bridging connector.
WO2001084673A1 (fr) * 2000-04-28 2001-11-08 Richard Bergner Elektroarmaturen Gmbh & Co. Kg Borne de derivation pour cable d'energie basse tension
EP1936746A1 (fr) * 2006-12-20 2008-06-25 3M Innovative Properties Company Article de connexion pour câble, support de connecteur pour article de connexion, et jeu de connexion de câbles
CN107317296A (zh) * 2017-08-09 2017-11-03 上海胜华电气股份有限公司 防火密水型预分支氧化镁电缆及其安装方法
CN110233364A (zh) * 2018-03-06 2019-09-13 张春燕 多芯电缆分接装置
CN110323698A (zh) * 2019-07-31 2019-10-11 广州番禺电缆集团有限公司 一种多芯电缆分线装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816817A (en) * 1972-12-15 1974-06-11 Pirelli General Cable Works Electrical connectors
DE2438003A1 (de) * 1974-08-07 1976-02-19 Petri Kg Elektro W Kontaktschraube mit fraesschlitz fuer elektrische abzweigklemmen
FR2414799A1 (fr) * 1978-01-13 1979-08-10 Verlant Et Beaurain Gousset de protection pour raccord de derivation a sertir

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816817A (en) * 1972-12-15 1974-06-11 Pirelli General Cable Works Electrical connectors
DE2438003A1 (de) * 1974-08-07 1976-02-19 Petri Kg Elektro W Kontaktschraube mit fraesschlitz fuer elektrische abzweigklemmen
FR2414799A1 (fr) * 1978-01-13 1979-08-10 Verlant Et Beaurain Gousset de protection pour raccord de derivation a sertir

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2263824A (en) * 1992-01-27 1993-08-04 British Gas Plc An electrical bridging connector.
GB2263824B (en) * 1992-01-27 1995-09-27 British Gas Plc An electrical connector
WO2001084673A1 (fr) * 2000-04-28 2001-11-08 Richard Bergner Elektroarmaturen Gmbh & Co. Kg Borne de derivation pour cable d'energie basse tension
EP1936746A1 (fr) * 2006-12-20 2008-06-25 3M Innovative Properties Company Article de connexion pour câble, support de connecteur pour article de connexion, et jeu de connexion de câbles
CN107317296A (zh) * 2017-08-09 2017-11-03 上海胜华电气股份有限公司 防火密水型预分支氧化镁电缆及其安装方法
CN107317296B (zh) * 2017-08-09 2023-10-31 上海胜华电气股份有限公司 防火密水型预分支氧化镁电缆及其安装方法
CN110233364A (zh) * 2018-03-06 2019-09-13 张春燕 多芯电缆分接装置
CN110323698A (zh) * 2019-07-31 2019-10-11 广州番禺电缆集团有限公司 一种多芯电缆分线装置

Also Published As

Publication number Publication date
ATE82649T1 (de) 1992-12-15
EP0285079B1 (fr) 1992-11-19
EP0285079A3 (en) 1990-03-21
DE3875994D1 (de) 1992-12-24

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