EP3806243A1 - Dispositif de coupe de l'isolation primaire d'un fil d'un câble à courant fort, borne de contact pénétrant l'isolation primaire doté d'un tel dispositif, ainsi que procédé de fabrication d'un lit à dents d'une telle borne de contact - Google Patents

Dispositif de coupe de l'isolation primaire d'un fil d'un câble à courant fort, borne de contact pénétrant l'isolation primaire doté d'un tel dispositif, ainsi que procédé de fabrication d'un lit à dents d'une telle borne de contact Download PDF

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Publication number
EP3806243A1
EP3806243A1 EP20187687.7A EP20187687A EP3806243A1 EP 3806243 A1 EP3806243 A1 EP 3806243A1 EP 20187687 A EP20187687 A EP 20187687A EP 3806243 A1 EP3806243 A1 EP 3806243A1
Authority
EP
European Patent Office
Prior art keywords
thread
tooth bed
cutting
threads
power 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Withdrawn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
EP20187687.7A
Other languages
German (de)
English (en)
Inventor
Peter Amann
Gerd Ordner
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.)
Arcus Elektrotechnik Alois Schiffmann GmbH
Original Assignee
Arcus Elektrotechnik Alois Schiffmann GmbH
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 Arcus Elektrotechnik Alois Schiffmann GmbH filed Critical Arcus Elektrotechnik Alois Schiffmann GmbH
Publication of EP3806243A1 publication Critical patent/EP3806243A1/fr
Withdrawn legal-status Critical Current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
    • H01R4/26—Connections in which at least one of the connecting parts has projections which bite into or engage the other connecting part in order to improve the 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
    • H01R4/36—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
    • H01R4/28—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

Definitions

  • the present invention relates generally to a device for cutting the primary insulation of a wire of a power cable, in particular for nominal voltages up to 1 kV and for making contact.
  • the device is particularly applicable for power cables in the low voltage range, in order to connect a multi-conductor cable to another multi-conductor cable, the device establishing the electrical contact and the mechanical connection between the wires of the cables, without first stripping the cables concerned.
  • the device In the final assembly state, current is transmitted via the device according to the invention.
  • the device also serves to increase the pull-out forces.
  • the invention further relates to a primary insulation-penetrating contact clamp with at least one contact screw guided in a clamping body and an at least regionally opposite end face of the contact screw Device for cutting the primary insulation of a wire of a power cable, especially for nominal voltages up to 1 kV.
  • Devices for connecting an electrical cable insulated by an outer jacket to one or more other conductors are well known. Such devices often have at least two clamping jaws made of electrically conductive material which are connected to a clamping member, these clamping jaws having teeth which are intended to penetrate the insulation when the two clamping jaws are clamped together in order to establish an electrical connection with the electrical conductors .
  • clamping jaws made of electrically conductive material which are connected to a clamping member, these clamping jaws having teeth which are intended to penetrate the insulation when the two clamping jaws are clamped together in order to establish an electrical connection with the electrical conductors .
  • connection devices known from the prior art are often not designed to withstand a pull-out force that is required and specified for the specific application.
  • the pull-out force is the critical force required to pull a conductor connected to a contact via a contact clamp out of the contact when the contact clamp is open.
  • the pull-out force is a quality criterion for a mechanical and electrical connection between two conductors made with a contact clamp, for example, and is usually determined as part of a supplementary quality test with the help of what is known as the pull-out test.
  • primary insulation used here is to be understood as the insulation of the individual wires, in particular of a multi-wire cable, such as a four-wire cable of a power supply network.
  • This primary insulation consists of an electrically insulating material, in particular plastic and / or paper, although it often happens that the plastic materials used for the primary insulation differ from cable to cable with regard to the plastic material and / or with regard to the strength (thickness) differentiate between the plastic insulation. Especially recently Increasingly cables are used whose cores are provided with only a relatively thin primary insulation in order to be able to save material.
  • the plastic and / or paper materials usually used as primary insulation have different mechanical and thermal properties that have an influence on the force necessary for penetration and penetration of the teeth of a contact clamp.
  • power cables of the type considered here differ significantly in the design of their primary insulation (thickness, number and material of the primary insulation or the individual layers of the primary insulation) due to the respective application cases, it is a challenge to see a tool, for example in the form of a Specify contact clamp which or which can be adapted to differently designed primary insulation in the most efficient way possible in order to effectively penetrate the primary insulation and to be able to galvanically contact the core or the inner conductor of the power cable.
  • the present invention is therefore based on the object of specifying a device for cutting the primary insulation of a wire of a power cable, in particular a power cable in the low voltage range, as well as a primary insulation penetrating contact clamp with such a cutting device, wherein the cable to be processed can be held exactly, and also with Primary insulation of different thicknesses of the conductor and, in the case of different materials of the primary insulation of the conductor, contact points can always be effectively introduced into the conductor.
  • connection device for a cable in particular for the low-voltage range, is to be specified which is simpler to construct and less expensive to manufacture than the known devices, while guaranteeing a completely safe electrical connection from an electrical and mechanical point of view.
  • the invention relates in particular to a device for cutting the layers of a wire of a power cable, in particular a power cable, the cutting device having a piercing knife arrangement in the form of a tooth bed.
  • the tooth bed of the grooving knife arrangement has a cutting geometry which is formed at least in some areas by superimposing at least two threads with different thread parameters introduced into the body of the tooth bed.
  • the term "thread” as used here is generally to be understood as a profiled notch which runs continuously in a helical manner, i.e. as a helical line, in the body of the tooth bed. This continuous indentation is referred to herein as the "thread" on the body of the tooth bed.
  • the threads which form the cutting geometry of the tooth bed, are preferably produced by machining, although a non-cutting (deforming) design of the thread is also conceivable.
  • the invention relates to a device for cutting the layers of a wire of a power cable, in particular power cable, wherein the device is a Having a grooving knife arrangement in the form of a tooth bed, and wherein the tooth bed has a cutting geometry which is formed at least in some areas by superimposing at least two threads introduced into the body of the tooth bed, which are at least partially designed in opposite directions.
  • the cutting device according to the invention is characterized in particular by the fact that an improved contact ratio and an improved contacting of the wire of the power cable can also be achieved in the long term with the aid of the special cutting geometry of the tooth bed.
  • the cutting device is suitable for power cables with different levels of insulation and, in particular, also for power cables with primary insulation of different hardness and thickness.
  • the cutting device can be manufactured with a single, in particular machining, system, specifically with different cutting geometries, by making threads with different thread parameters and / or with different running directions in the body of the tooth bed.
  • the invention also relates to a primary insulation penetrating contact clamp with at least one contact screw guided in a clamping body and a cutting device of the aforementioned type which is at least partially opposite the end face of the contact screw.
  • This can in particular be a connecting clamp which is used to connect two insulated cable conductors.
  • the invention can also be applied to a branch terminal.
  • the contact screw can be a milling screw, that is to say a screw with cutting edges and slots provided on the end face in order to mill off the insulation of the cable conductors and remove the milled off material. Thorns or ring cutters are also suitable.
  • the contact clamp according to the invention uses a specially designed toothing which is opposite the end face of the contact screw.
  • the toothing consists of teeth or cutting edges that are firmly arranged in the body of the tooth bed (such as in the clamping body), the geometry of which is formed at least in some areas by superimposing at least two threads with different thread parameters introduced into the body of the tooth bed.
  • the tooth bed has a cutting geometry which is formed, at least in some areas, by superimposing at least two threads made in the body of the tooth bed which are at least partially in opposite directions.
  • the cutting geometry of the tooth bed can be optimally adapted to the respective application. This results in improved contact conditions, even for cores of a cable with different degrees of primary insulation.
  • the cutting geometry of the tooth bed is formed by superimposing a first thread and a second thread, the first thread having first flanks and the second thread having second flanks, the first flanks running parallel to one another and forming first cutting edges of the cutting geometry, and whereby the second flanks run parallel to one another and form second cutting edges of the cutting geometry.
  • first and second cutting edges of the cutting geometry run obliquely to one another.
  • flanks of the first / or second thread are preferably designed as pointed flanks, so that even particularly hard and / or thick (strong) cable insulation can be penetrated with a relatively low contact pressure.
  • flank geometries are also conceivable, such as, for example, trapezoidal flanks.
  • the tooth bed is at least partially cylindrical.
  • connectors or toothed beds with non-cylindrical or non-round internal geometry are also conceivable.
  • the tooth bed serves in particular to take up the power cable to be contacted or processed, in particular power cable, in a leading manner. In this way, when contacting or processing the power cable, it can be held exactly.
  • the primary insulation penetrating contact clamp according to the invention is particularly suitable for insulated conductors that may be mounted under voltage.
  • the tooth bed with the special cutting geometry When contacting an insulated conductor, the tooth bed with the special cutting geometry is pressed into the insulation of the conductor via the contact screw.
  • the special cutting geometry of the tooth bed allows in particular the formation of an "aggressive" tooth geometry, which not only ensures reliable penetration of the primary insulation of various types, but also ensures sufficiently deep penetration into the wire of the power cable.
  • the device according to the invention can not only be used for cables with different primary insulation, but also guarantees an increased (critical) pull-out force, since the special tooth geometry ensures increased mechanical fixation with the corresponding wire of the power cable.
  • the invention relates to a method for producing a tooth bed of a primary insulation-penetrating contact clamp, wherein first a base body, in particular made of metal, is provided and a core hole is made in the base body. A first and a second thread are then introduced into the core bore. It is provided in particular that the first and the second thread overlap at least in some areas and have different thread parameters and / or are designed to run in opposite directions at least in areas.
  • FIG. 1 is schematically in a longitudinal sectional view an exemplary embodiment of a primary insulation-penetrating contact terminal 1 for insulated cable conductors (in FIG. 1 not shown).
  • the contact terminal 1 of this embodiment has at least one contact screw 3 guided in a clamping body 2 and a cutting device 5 which is at least partially opposite the end face 4 of the contact screw 3.
  • This cutting device 5 is sometimes also referred to as a "contact element”.
  • the clamping body 2 of the contact terminal 1 can - as in FIG. 1 shown - consist of a hollow cylindrical sleeve in which corresponding threaded holes are formed, in which the contact screws 3 are guided.
  • the contact screws 3 can be provided with milling slots on their end face 4, although this is not essential to the invention.
  • each contact screw 3 is a cutting device 5 in the form of a contact element which, for example, has the shape of a small potty or bowl with a tooth bed.
  • the tooth bed comprises a cutting geometry, as will then be described with reference to the illustration in FIG. 3a to FIG. 3e is described in more detail using exemplary embodiments.
  • the contact element 5 can preferably consist of a copper alloy, so that there is a certain inherent springiness. Of course, other materials are also conceivable, such as aluminum.
  • the cutting geometry of the tooth bed of the contact elements 5 is formed, at least in some areas, by superimposing two threads with different thread parameters that are introduced into the body of the tooth bed.
  • the in FIG. 3a to FIG. 3e Half-tools 7 shown are provided that the cutting geometry of the tooth bed is formed at least in some areas by an overlay of two threads 6a, 6b made in the body of the tooth bed, these threads 6a, 6b at least in some areas being designed in opposite directions.
  • the semi-finished product 7 according to FIG. 3a the cutting geometry is formed by a first left-hand thread 6a with 5 mm pitch and three turns and by a second right-hand thread 6b with 5 mm pitch and three turns.
  • the cutting geometry in the semifinished product 7 is formed by a first left-hand thread 6a with 7 mm pitch and a second right-hand thread 6b with 8 mm pitch and six turns.
  • the cutting geometry in the semifinished product 7 is formed by a first left-hand thread 6a with a 20 mm pitch and a second right-hand thread 6b with a 20 mm pitch and three turns.
  • the semi-finished products 7, as shown schematically in the FIG. 3a to 3e are shown can be produced with a single cutting device, whereby by varying the thread turns, the thread pitch, the pitch angle, the flank shape, the flank diameter and / or the thread depth, different Let cutting geometries and, in particular, cutting geometries adapted to the respective application of the contact terminal 1 be realized.
  • the contact clamp 1 according to the invention is also particularly suitable for cable conductors of different diameters.

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  • Processing Of Terminals (AREA)
EP20187687.7A 2019-08-23 2020-07-24 Dispositif de coupe de l'isolation primaire d'un fil d'un câble à courant fort, borne de contact pénétrant l'isolation primaire doté d'un tel dispositif, ainsi que procédé de fabrication d'un lit à dents d'une telle borne de contact Withdrawn EP3806243A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019122735.6A DE102019122735A1 (de) 2019-08-23 2019-08-23 Vorrichtung zum schneiden der primärisolation einer ader eines starkstromkabels, primärisolationsdurchdringende kontaktklemme mit solch einer vorrichtung sowie verfahren zur herstellung eines zahnbettes einer solchen kontaktklemme

Publications (1)

Publication Number Publication Date
EP3806243A1 true EP3806243A1 (fr) 2021-04-14

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ID=71833166

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20187687.7A Withdrawn EP3806243A1 (fr) 2019-08-23 2020-07-24 Dispositif de coupe de l'isolation primaire d'un fil d'un câble à courant fort, borne de contact pénétrant l'isolation primaire doté d'un tel dispositif, ainsi que procédé de fabrication d'un lit à dents d'une telle borne de contact

Country Status (2)

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EP (1) EP3806243A1 (fr)
DE (1) DE102019122735A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19929840A1 (de) 1998-07-01 2000-01-05 Cahors App Elec Vorrichtung zum Anschließen eines elektrischen Kabels an einem oder mehrere andere Leiter
FR2784805A1 (fr) * 1998-09-16 2000-04-21 Carrier Kheops Bac Manchon et cosse de jonction electrique pour cable electrique de basse et moyenne tension

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2744288B1 (fr) * 1996-01-30 1998-03-06 Simel Raccord de connexion pour ligne electrique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19929840A1 (de) 1998-07-01 2000-01-05 Cahors App Elec Vorrichtung zum Anschließen eines elektrischen Kabels an einem oder mehrere andere Leiter
FR2784805A1 (fr) * 1998-09-16 2000-04-21 Carrier Kheops Bac Manchon et cosse de jonction electrique pour cable electrique de basse et moyenne tension

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Publication number Publication date
DE102019122735A1 (de) 2021-02-25

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