EP0020229B1 - Electrical connecting device of the insulation perforation type - Google Patents

Electrical connecting device of the insulation perforation type Download PDF

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Publication number
EP0020229B1
EP0020229B1 EP80400680A EP80400680A EP0020229B1 EP 0020229 B1 EP0020229 B1 EP 0020229B1 EP 80400680 A EP80400680 A EP 80400680A EP 80400680 A EP80400680 A EP 80400680A EP 0020229 B1 EP0020229 B1 EP 0020229B1
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EP
European Patent Office
Prior art keywords
control head
groove
cable
insulating
chimney
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.)
Expired
Application number
EP80400680A
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German (de)
French (fr)
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EP0020229A1 (en
Inventor
Michel Delin
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.)
Niled SA
Original Assignee
Niled SA
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Filing date
Publication date
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Application filed by Niled SA filed Critical Niled SA
Priority to AT80400680T priority Critical patent/ATE7344T1/en
Publication of EP0020229A1 publication Critical patent/EP0020229A1/en
Application granted granted Critical
Publication of EP0020229B1 publication Critical patent/EP0020229B1/en
Expired 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
    • H01R4/2475—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts
    • H01R4/2483—Connections using contact members penetrating or cutting insulation or cable strands the contact members penetrating the insulation being actuated by screws, nuts or bolts penetrating the area under the screw tip
    • 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
    • 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
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • H01R4/366—Conductive members located under tip of screw with intermediate part between tip and conductive member intermediate part attached to the tip of the 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
    • H01R4/36—Conductive members located under tip of screw
    • H01R4/363—Conductive members located under tip of screw with intermediate part between tip and conductive member
    • 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

Definitions

  • the present invention relates to a device for establishing an electrical connection between a conductive cable covered with an insulating sheath and a second conductor, of the type comprising means capable of perforating the insulating sheath of the cable under the action of a threaded clamping member.
  • a control head which is intended to separate from the threaded clamping member, at the level of a groove, under the action of a tightening torque corresponding to the tightening torque necessary for the means of perforation completely pass through the insulating sheath, in order to ensure good electrical contact between the cable and the second conductor, and an insulating casing covering the perforation means and the threaded clamping member.
  • Document GB-A-1 465 907 describes a connection device of this type which has the disadvantage of not allowing, after separation of the control head, a subsequent tightening or dismantling of the threaded member.
  • the insulating housing of this device which is not removable, also requires a great deal of time and skill for its installation which is normally ensured after the electrical connection between the conductors has been made, but which could be before separation of the control head, and therefore when the electrical connection is not perfectly guaranteed.
  • Document GB-A-1 402 280 describes an electrical connection device provided with a control head intended to break by shearing, but which can no longer be used, after it has broken, to act on the connection made between the electrical conductors . It is true that this device is provided with a cover. The latter, which is molded on site after the head has broken, cannot however be removed after it has been poured and consequently prohibits any subsequent intervention on the connection.
  • the present invention proposes to overcome the drawbacks of the electrical connection devices of the prior art and, to do this, it relates to a connection device of the aforementioned type which is characterized in that the groove separates the control head in two coaxial elements, one allowing the application of the tightening torque while the other authorizes disassembly or subsequent tightening; and in that the insulating casing comprises a chimney outside of which the control head projects when it is not broken, as well as a removable closing cover adaptable on the chimney only after the breaking of the control head at level of the groove, this cover being connected to the housing by a flexible rod.
  • the operator can easily proceed, after rupture of the control head at the level of the groove, to a subsequent tightening or disassembly of the connection device. Furthermore, it can close the cover, to restore the electrical insulation, only after having broken the control head, and therefore only when the perforation means have completely passed through the insulating sheath of the cable. This condition naturally helps to guarantee the quality of the connection when the operator has to work in difficult conditions, for example in the dark or at the end of a pole, where he cannot be aware of the break in trying to put the hood in place.
  • the fact that the cover is removable allows easy access, with an appropriate tool, to the element allowing subsequent disassembly or tightening.
  • the cover is integral with the insulating housing, it is always available to the operator who does not have to obtain it separately. It is also always perfectly suited to the dimensions of the chimney which can therefore be hermetically closed after the head has broken.
  • the groove receives a stop protruding from the side walls of the two elements of the control head.
  • This retainer prohibits possible simultaneous tightening of the two elements of the control head which would have the effect of not achieving the aim sought by the present invention.
  • the stopper is constituted by a plastic washer.
  • the two elements of the control head also have a hexagonal section.
  • FIG. 1 shows the connection device according to the invention enclosing a cable A.
  • This device consists of a part 1a constituted, in a manner known per se, by a metal socket (not visible) to which can be connected the end of any line of bypass, short circuit or ground.
  • An insulating cap 2 made of rubber or any other insulating material, surrounds the part 1a of the connector. This cap is provided at its lower end with an opening which can be closed by a plug 3 of insulating material and which allows an operator to reach the socket.
  • the connection device also comprises a part 1b (visible in FIGS. 1 and 2) constituted by a metal part 4 having the shape of a C, the two branches 4a and 4b of which are parallel and substantially of the same thickness face each other and are connected laterally by a plate 4c of substantially the same thickness and slightly curved.
  • the metal part 4 is mechanically and electrically connected to the sleeve of the part 1a.
  • a toothed jaw 5a is integral with the branch 4b while the branch 4a is pierced with a threaded bore intended to receive the body of a threaded member 6 such as a screw.
  • a toothed movable jaw 5b and facing the previous one is integral with the lower end of the threaded member which thus controls its movement.
  • the threaded clamping member is provided with a control head 7 separated into two coaxial elements 7a and 7b by a groove 8.
  • the two elements 7a and 7b of the control head are hexagonal and of the same dimension. But it is obvious that a different shape can be envisaged as long as a tightening tool corresponds to it.
  • two elements of different dimensions can be provided for the control head.
  • the groove forms a rupture zone at the level of which the control head is intended to break under the effect of a predetermined tightening torque, applied to its external element 7a. The latter then detaches from the inner element 7b, thereby shortening the height of the threaded clamping member. The depth of the groove will be calculated so that, depending on the material of the threaded clamping member, the break occurs for the predetermined tightening torque.
  • the groove receives, over its entire circumference, a retainer 9 which may for example be a plastic washer.
  • a retainer 9 which may for example be a plastic washer.
  • On part 1b of the connector fits a removable housing 10 made of insulating material (visible in Figures 2 and 3).
  • This insulating box follows the shape of part 1b of the connector. It is constituted towards its base by a skirt 10a which opens at the level of the slot 11 to come and grip the carrying cable.
  • the skirt closes around the carrying cable thanks to two lugs 12 which fit by pressing into two holes 13 facing them.
  • the carrying cable then leaves the two sides of the housing 10 through two orifices 14 formed by the bringing together of the two parts of the skirt 10a.
  • the insulating housing On its upper part, the insulating housing is provided with a chimney 15 serving as a housing for the control head of the threaded member of the connector.
  • This chimney is of a height such that when the casing is fitted on the connector, the threaded clamping member clearly protrudes from the edge of the chimney inlet before its control head is broken and comes just at the level or a little below the edge of the chimney entrance after his head was broken.
  • a cover 16 of cylindrical shape connected to the housing by a flexible rod 17, is intended to come to fit on the chimney to close it hermetically. Its height is calculated so that when it closes the chimney, its bottom 16a comes into contact with the edges of the entrance to the chimney. Consequently, the cover can not fully fit on the chimney until the control head is broken.
  • the device as described above can be used in the following manner.
  • the insulated carrying cable A is brought between the jaws 5a and 5b of the connector 1 provided with its insulating housing 10 which opens at the level of the slot 11.
  • the jaws 5a and ⁇ .5b are brought together beforehand to hold the cable without however perforate its insulating sheath.
  • the insulating housing 10 is closed around the cable by bringing the two parts of its skirt together. The closure is done by a simple pressure on the lugs 12 which are embedded in the corresponding holes 13.
  • the external element 7a of the control head 7 of the threaded clamping member is then clamped using an appropriate clamping tool which comes into contact with the retainer 9.
  • the clamping tool does not simultaneously engage on the internal element 7b of the control head.
  • the simultaneous tightening of the two elements of the control head would have the effect of not fully applying the predetermined tightening torque to the external element of the control head.
  • the tightening check would then be distorted.
  • the control head 7 breaks at the level of the groove 8. It is then certain that good electrical contact is made. made between the connector and the conductive part of the carrier cable.
  • the stopper 9 which was held between the two elements of the control head is eliminated after the latter has broken. We can therefore later use the inner element 7b of the control head to optionally disassemble or tighten the connector. Once the control head has been broken, it no longer protrudes from the chimney 15, and the cover 16 can be completely fitted onto the insulating housing 10.
  • connection device finds its main application in short-circuiting or grounding of the cables isolated from the electrical energy distribution networks.
  • it can obviously be used for all types of electrical connections with insulation perforation, for example for connections from one network to another network or for subscriber connection connections.
  • the invention can be provided with several perforation means on the connector side making it possible to derive several insulated carrying cables.

Landscapes

  • Multi-Conductor Connections (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Cable Accessories (AREA)

Abstract

1. A device for forming an electrical connection between a conducting cable covered with an insulating sheath and a second conductor, of the type comprising means (5a, 5b) adapted to perforate the insulating sheath of the cable under the action of a threaded clamping member (6) provided with a control head (7) which is intended to be separated from the threaded clamping member at the level of a groove (8), under the action of a clamping torque corresponding to the clamping torque required so that the perforation means pass completely through the insulating sheath, so as to ensure good electrical contact between the cable and the second conductor, and an insulating case (10) covering the perforation means and the threaded clamping member, characterized in that the groove (8) separates the control head (7) into two coaxial elements (7a, 7b), one (7a) allowing the clamping torque to be applied while the other (7b) allows disassembly or subsequent reclamping : and in that the insulating case (10) comprises a chimney (15) from which the control head (7) projects when it is not broken, as well as a removable closure cover (16) adaptable to the chimney (15) only after breakage of the control head (7) at the level of the groove (8), this cover (16) being connected to the case (10) by a flexible strip (17).

Description

La présente invention concerne un dispositif pour établir une connexion électrique entre un câble conducteur recouvert d'une gaine isolante et un deuxième conducteur, du type comprenant des moyens aptes à perforer la gaine isolante du câble sous l'action d'un organe fileté de serrage pourvu d'une tête de commande, laquelle est destinée à se séparer de l'organe fileté de serrage, au niveau d'une gorge, sous l'action d'un couple de serrage correspondant au couple de serrage nécessaire pour que les moyens de perforation traversent complètement la gaine isolante, afin d'assurer un bon contact électrique entre le câble et le deuxième conducteur, et un boîtier isolant recouvrant les moyens de perforation et l'organe fileté de serrage.The present invention relates to a device for establishing an electrical connection between a conductive cable covered with an insulating sheath and a second conductor, of the type comprising means capable of perforating the insulating sheath of the cable under the action of a threaded clamping member. provided with a control head, which is intended to separate from the threaded clamping member, at the level of a groove, under the action of a tightening torque corresponding to the tightening torque necessary for the means of perforation completely pass through the insulating sheath, in order to ensure good electrical contact between the cable and the second conductor, and an insulating casing covering the perforation means and the threaded clamping member.

Le document GB-A-1 465 907 décrit un dispositif de connexion de ce type qui a l'inconvénient de ne pas autoriser, après la séparation de la tête de commande, un serrage ou un démontage ultérieur de l'organe fileté. Le boîtier isolant de ce dispositif, qui n'est pas amovible, nécessite par ailleurs beaucoup de temps et d'adresse pour sa mise en place qui est normalement assurée après la réalisation de la connexion électrique entre les conducteurs, mais qui pourrait l'être avant la séparation de la tête de commande, et donc quand la connexion électrique n'est pas assurée de façon parfaite.Document GB-A-1 465 907 describes a connection device of this type which has the disadvantage of not allowing, after separation of the control head, a subsequent tightening or dismantling of the threaded member. The insulating housing of this device, which is not removable, also requires a great deal of time and skill for its installation which is normally ensured after the electrical connection between the conductors has been made, but which could be before separation of the control head, and therefore when the electrical connection is not perfectly guaranteed.

Le document GB-A-1 402 280 décrit un dispositif de connexion électrique pourvu d'une tête de commande destinée à se casser par cisaillement, mais ne pouvant plus être utilisée, après sa rupture, pour agir sur la connexion réalisée entre les conducteurs électriques. Il est vrai que ce dispositif est pourvu d'un capot. Celui-ci, qui est moulé sur place après la rupture de la tête, ne peut toutefois être retiré après sa coulée et interdit par conséquent toute intervention ultérieure sur la connexion.Document GB-A-1 402 280 describes an electrical connection device provided with a control head intended to break by shearing, but which can no longer be used, after it has broken, to act on the connection made between the electrical conductors . It is true that this device is provided with a cover. The latter, which is molded on site after the head has broken, cannot however be removed after it has been poured and consequently prohibits any subsequent intervention on the connection.

Les documents FR-A-2 002 080 et FR-A-2 328 876 décrivent quant à eux des dispositifs de serrage du type boulon-écrou destinés à des domaines techniques n'ayant rien à voir avec celui des connexions électriques. Ces dispositifs de serrage ne permettent pas, après l'application d'un couple de serrage calibré, de procéder à un démontage ou à un resserrage ultérieur.Documents FR-A-2 002 080 and FR-A-2 328 876 describe tightening devices of the bolt-nut type intended for technical fields having nothing to do with that of electrical connections. These tightening devices do not allow, after the application of a calibrated tightening torque, to carry out a disassembly or a subsequent tightening.

La présente invention se propose de remédier aux inconvénients des dispositifs de connexion électrique de la technique antérieure et, pour ce faire, elle a pour objet un dispositif de connexion du type précité qui se caractérise en ce que la gorge sépare la tête de commande en deux éléments coaxiaux, l'un permettant l'application du couple de serrage tandis que l'autre autorise un démontage ou un resserrage ultérieur ; et en ce que le boîtier isolant comporte une cheminée hors de laquelle la tête de commande fait saillie lorsqu'elle n'est pas cassée, ainsi qu'un capot de fermeture amovible adaptable sur la cheminée seulement après la rupture de la tête de commande au niveau de la gorge, ce capot étant relié au boîtier par une tige flexible.The present invention proposes to overcome the drawbacks of the electrical connection devices of the prior art and, to do this, it relates to a connection device of the aforementioned type which is characterized in that the groove separates the control head in two coaxial elements, one allowing the application of the tightening torque while the other authorizes disassembly or subsequent tightening; and in that the insulating casing comprises a chimney outside of which the control head projects when it is not broken, as well as a removable closing cover adaptable on the chimney only after the breaking of the control head at level of the groove, this cover being connected to the housing by a flexible rod.

Ainsi, l'opérateur peut facilement procéder, après rupture de la tête de commande au niveau de la gorge, à un serrage ultérieur ou au démontage du dispositif de connexion. Par ailleurs, il ne peut fermer le capot, pour reconstituer l'isolation électrique, qu'après avoir cassé la tête de commande, et donc seulement quand les moyens de perforation ont complètement traversé la gaine isolante du câble. Cette condition contribue bien entendu à garantir la qualité de la connexion quand l'opérateur doit travailler dans des conditions pénibles, par exemple dans l'obscurité ou à l'extrémité d'un poteau, où il ne peut se rendre compte de la rupture de la tête qu'en essayant de mettre le capot en place.Thus, the operator can easily proceed, after rupture of the control head at the level of the groove, to a subsequent tightening or disassembly of the connection device. Furthermore, it can close the cover, to restore the electrical insulation, only after having broken the control head, and therefore only when the perforation means have completely passed through the insulating sheath of the cable. This condition naturally helps to guarantee the quality of the connection when the operator has to work in difficult conditions, for example in the dark or at the end of a pole, where he cannot be aware of the break in trying to put the hood in place.

Par ailleurs, le fait que le capot soit amovible permet d'accéder facilement, avec un outil approprié, à l'élément autorisant les démontages ou les resserrages ultérieurs.Furthermore, the fact that the cover is removable allows easy access, with an appropriate tool, to the element allowing subsequent disassembly or tightening.

Enfin, comme le capot est solidaire du boîtier isolant, il est toujours à la disposition de l'opérateur qui n'a pas à se le procurer séparément. Il est en outre toujours parfaitement adapté aux dimensions de la cheminée qui peut par conséquent être hermétiquement fermée après la rupture de la tête.Finally, as the cover is integral with the insulating housing, it is always available to the operator who does not have to obtain it separately. It is also always perfectly suited to the dimensions of the chimney which can therefore be hermetically closed after the head has broken.

D'une manière avantageuse, la gorge reçoit un arrêtoir faisant saillie sur les parois latérales des deux éléments de la tête de commande. Cet arrêtoir interdit un éventuel serrage simultané des deux éléments de la tête de commande qui aurait pour effet de ne pas procurer le but recherché par la présente invention.Advantageously, the groove receives a stop protruding from the side walls of the two elements of the control head. This retainer prohibits possible simultaneous tightening of the two elements of the control head which would have the effect of not achieving the aim sought by the present invention.

Selon un mode de réalisation particulier de l'invention, l'arrêtoir est constitué par une rondelle en matière plastique.According to a particular embodiment of the invention, the stopper is constituted by a plastic washer.

De préférence, les deux éléments de la tête de commande ont par ailleurs une section hexagonale.Preferably, the two elements of the control head also have a hexagonal section.

Un mode d'exécution de la présente invention sera décrit ci-après en référence au dessin annexé dans lequel :

  • La figure 1 est une vue en perspective du dispositif de connexion selon l'invention, non encore en fonction et dépourvu de son boîtier isolant ;
  • La figure 2 est une vue de côté partiellement en coupe de la tête du dispositif de connexion avant serrage, le capot du coîtier isolant étant ouvert ; et,
  • La figure 3 est une vue de côté partiellement en coupe du dispositif de connexion après un serrage optimal, le capot du boîtier isolant étant fermé.
An embodiment of the present invention will be described below with reference to the accompanying drawing in which:
  • Figure 1 is a perspective view of the connection device according to the invention, not yet in operation and devoid of its insulating housing;
  • Figure 2 is a side view partially in section of the head of the connection device before tightening, the cover of the insulating housing being open; and,
  • Figure 3 is a side view partially in section of the connection device after optimal tightening, the cover of the insulating housing being closed.

La figure 1 montre le dispositif de connexion selon l'invention enserrant un câble A. Ce dispositif se compose d'une partie 1a constituée, d'une manière connue en soi, par une douille métallique (non visible) sur laquelle peut venir se connecter l'extrémité d'une ligne quelconque de dérivation, de court-circuit ou de mise à la terre. Un capuchon isolant 2, en caoutchouc ou en toute autre matière isolante, entoure la partie la du connecteur. Ce capuchon est pourvu à son extrémité inférieure d'une ouverture qui peut être fermée par un bouchon 3 en matière isolante et qui permet à un opérateur d'atteindre la douille.Figure 1 shows the connection device according to the invention enclosing a cable A. This device consists of a part 1a constituted, in a manner known per se, by a metal socket (not visible) to which can be connected the end of any line of bypass, short circuit or ground. An insulating cap 2, made of rubber or any other insulating material, surrounds the part 1a of the connector. This cap is provided at its lower end with an opening which can be closed by a plug 3 of insulating material and which allows an operator to reach the socket.

Le dispositif de connexion comprend également une partie lb (visible sur les figures 1 et 2) constituée par une pièce métallique 4 ayant la forme d'un C dont les deux branches 4a et 4b parallèles et sensiblement de même épaisseur se font face et sont reliées latéralement par une plaque 4c sensiblement de même épaisseur et légèrement incurvée. La pièce métallique 4 est reliée mécaniquement et électriquement à la douille de la partie 1a. Une mâchoire dentée 5a est solidaire de la branche 4b tandis que la branche 4a est percée d'un alésage fileté destiné à recevoir le corps d'un organe fileté 6 tel qu'une vis. Une mâchoire mobile dentée 5b et faisant face à la précédente est solidaire de l'extrémité inférieure de l'organe fileté qui commande ainsi son déplacement.The connection device also comprises a part 1b (visible in FIGS. 1 and 2) constituted by a metal part 4 having the shape of a C, the two branches 4a and 4b of which are parallel and substantially of the same thickness face each other and are connected laterally by a plate 4c of substantially the same thickness and slightly curved. The metal part 4 is mechanically and electrically connected to the sleeve of the part 1a. A toothed jaw 5a is integral with the branch 4b while the branch 4a is pierced with a threaded bore intended to receive the body of a threaded member 6 such as a screw. A toothed movable jaw 5b and facing the previous one is integral with the lower end of the threaded member which thus controls its movement.

A son autre extrémité, l'organe fileté de serrage est muni d'une tête de commande 7 séparée en deux éléments coaxiaux 7a et 7b par une gorge 8. Dans le mode de réalisation représenté sur les dessins, les deux éléments 7a et 7b de la tête de commande sont de forme hexagonale et de même dimension. Mais il est bien évident qu'une forme différente peut être envisagée du moment qu'un outil de serrage lui correspond. De même, on peut prévoir deux éléments de dimensions différentes pour la tête de commande. La gorge forme une zone de rupture au niveau de laquelle la tête de commande est destinée à se casser sous l'effet d'un couple de serrage prédéterminé, appliqué sur son élément extérieur 7a. Celui-ci se détache alors de l'élément intérieur 7b, raccourcissant ainsi la hauteur de l'organe fileté de serrage. La profondeur de la gorge sera calculée pour que, en fonction du matériau constitutif de l'organe fileté de serrage, la cassure ait lieu pour le couple de serrage prédéterminé.At its other end, the threaded clamping member is provided with a control head 7 separated into two coaxial elements 7a and 7b by a groove 8. In the embodiment shown in the drawings, the two elements 7a and 7b of the control head are hexagonal and of the same dimension. But it is obvious that a different shape can be envisaged as long as a tightening tool corresponds to it. Likewise, two elements of different dimensions can be provided for the control head. The groove forms a rupture zone at the level of which the control head is intended to break under the effect of a predetermined tightening torque, applied to its external element 7a. The latter then detaches from the inner element 7b, thereby shortening the height of the threaded clamping member. The depth of the groove will be calculated so that, depending on the material of the threaded clamping member, the break occurs for the predetermined tightening torque.

La gorge reçoit, sur toute sa circonférence, un arrêtoir 9 qui peut être par exemple une rondelle en matière plastique. Sur la partie 1 b du connecteur vient s'emboîter un boîtier amovible 10 en matière isolante (visible sur les figures 2 et 3). Ce boîtier isolant épouse la forme de la partie 1 b du connecteur. Il est constitué vers sa base par une jupe 10a qui s'ouvre au niveau de la fente 11 pour venir enserrer le câble porteur. La jupe se referme autour du câble porteur grâce à deux ergots 12 s'emboîtant par pression dans deux trous 13 leur faisant face. Le câble porteur sort alors des deux côtés du boîtier 10 par deux orifices 14 formés par le rapprochement des deux parties de la jupe 10a. Sur sa partie supérieure, le boîtier isolant est pourvu d'une cheminée 15 servant de logement à la tête de commande de l'organe fileté du connecteur. Cette cheminée est d'une hauteur telle que lorsque le boîtier est emboîté sur le connecteur, l'organe fileté de serrage dépasse nettement du bord de l'entrée de la cheminée avant que sa tête de commande ne soit cassée et vienne juste au niveau ou un peu en dessous du bord de l'entrée de la cheminée après que sa tête a été cassée. Un capot 16 de forme cylindrique relié au boîtier par une tige flexible 17, est destiné à venir s'emboîter sur la cheminée pour la fermer hermétiquement. Sa hauteur est calculée pour que lorsqu'il ferme la cheminée, son fond 16a vienne au contact des bords de l'entrée de la cheminée. Par conséquent, le capot ne pourra s'emboîter complètement sur la cheminée que lorsque la tête de commande sera cassée.The groove receives, over its entire circumference, a retainer 9 which may for example be a plastic washer. On part 1b of the connector fits a removable housing 10 made of insulating material (visible in Figures 2 and 3). This insulating box follows the shape of part 1b of the connector. It is constituted towards its base by a skirt 10a which opens at the level of the slot 11 to come and grip the carrying cable. The skirt closes around the carrying cable thanks to two lugs 12 which fit by pressing into two holes 13 facing them. The carrying cable then leaves the two sides of the housing 10 through two orifices 14 formed by the bringing together of the two parts of the skirt 10a. On its upper part, the insulating housing is provided with a chimney 15 serving as a housing for the control head of the threaded member of the connector. This chimney is of a height such that when the casing is fitted on the connector, the threaded clamping member clearly protrudes from the edge of the chimney inlet before its control head is broken and comes just at the level or a little below the edge of the chimney entrance after his head was broken. A cover 16 of cylindrical shape connected to the housing by a flexible rod 17, is intended to come to fit on the chimney to close it hermetically. Its height is calculated so that when it closes the chimney, its bottom 16a comes into contact with the edges of the entrance to the chimney. Consequently, the cover can not fully fit on the chimney until the control head is broken.

Le dispositif tel que décrit ci-dessus pourra être utilisé de la manière suivante.The device as described above can be used in the following manner.

Le câble porteur A isolé, est amené entre les mâchoires 5a et 5b du connecteur 1 muni de son boîtier isolant 10 qui s'ouvre au niveau de la fente 11. Les mâchoires 5a et<.5b sont préalablement rapprochées pour maintenir le câble sans toutefois perforer sa gaine isolante. Le boîtier isolant 10 est refermé autour du câble par rapprochement des deux parties de sa jupe. La fermeture se fait par une simple pression sur les ergots 12 qui viennent s'encastrer dans les trous correspondants 13. L'élément extérieur 7a de la tête de commande 7 de l'organe fileté de serrage est alors serré à l'aide d'un outil de serrage approprié qui vient au contact de l'arrêtoir 9. Ainsi, l'outil de serrage ne vient pas simultanément en prise sur l'élément intérieur 7b de la tête de commande. Le serrage simultané des deux éléments de la tête de commande aurait pour effet de ne pas appliquer entièrement le couple de serrage prédéterminé sur l'élément extérieur de la tête de commande. Le contrôle du serrage serait alors faussé.The insulated carrying cable A is brought between the jaws 5a and 5b of the connector 1 provided with its insulating housing 10 which opens at the level of the slot 11. The jaws 5a and <.5b are brought together beforehand to hold the cable without however perforate its insulating sheath. The insulating housing 10 is closed around the cable by bringing the two parts of its skirt together. The closure is done by a simple pressure on the lugs 12 which are embedded in the corresponding holes 13. The external element 7a of the control head 7 of the threaded clamping member is then clamped using an appropriate clamping tool which comes into contact with the retainer 9. Thus, the clamping tool does not simultaneously engage on the internal element 7b of the control head. The simultaneous tightening of the two elements of the control head would have the effect of not fully applying the predetermined tightening torque to the external element of the control head. The tightening check would then be distorted.

Lorsqu'on atteint le couple de serrage prédéterminé correspondant au couple de serrage nécessaire pour assurer la perforation normale de l'isolant, la tête de commande 7 se casse au niveau de la gorge 8. On est alors sûr qu'un bon contact électrique est réalisé entre le connecteur et la partie conductrice du câble porteur. L'arrêtoir 9 qui était maintenu entre les deux éléments de la tête de commande est éliminé après la cassure de celle-ci. On pourra donc utiliser ultérieurement l'élément intérieur 7b de la tête de commande pour éventuellement démonter ou resserrer le connecteur. Une fois que la tête de commande a été cassée, celle-ci ne dépasse plus de la cheminée 15, et le capot 16 peut être complètement emboîté sur le boîtier isolant 10. Si le couple de serrage appliqué sur l'élément extérieur 7a de la tête de commande n'avait pas été suffisant pour casser la tête de commande, celle-ci dépasserait nettement de la cheminée ; le capot ne pourrait alors pas être emboîté complètement sur le boîtier et l'opérateur, utilisant le connecteur selon l'invention, saurait alors qu'il n'a pas suffisamment serré la tête de commande pour qu'un bon contact électrique soit établi entre le connecteur et le câble. Une fois que le capot 16 est emboîté complètement sur la cheminée 15, la reconstitution de l'isolation du câble est réalisée. Le capot étant amovible, on peut ainsi avoir accès à tout moment à la tête de commande de l'organe fileté de serrage pour un démontage du connecteur ou un resserrage des mâchoires, lorsque par exemple, après un certain nombre d'opérations de connexion, elles se sont progressivement déserrées.When the predetermined tightening torque corresponding to the tightening torque necessary to ensure normal perforation of the insulation is reached, the control head 7 breaks at the level of the groove 8. It is then certain that good electrical contact is made. made between the connector and the conductive part of the carrier cable. The stopper 9 which was held between the two elements of the control head is eliminated after the latter has broken. We can therefore later use the inner element 7b of the control head to optionally disassemble or tighten the connector. Once the control head has been broken, it no longer protrudes from the chimney 15, and the cover 16 can be completely fitted onto the insulating housing 10. If the tightening torque applied to the external element 7a of the control head had not been sufficient to break the control head, it would clearly protrude from the chimney; the cover could not then be completely fitted onto the housing and the operator, using the connector according to the invention, would then know that he had not sufficiently tightened the control head for a good electrical contact to be established between connector and cable. Once the cover 16 is completely fitted onto the chimney 15, the cable insulation is reconstituted. The hood being removable, you can thus have access at any time to the control head of the threaded clamping member for disassembly of the connector or tightening of the jaws, when for example, after a certain number of connection operations, they are gradually loosened.

Le dispositif de connexion selon l'invention trouve sa principale application dans la mise en court-circuit où la mise à la terre des câbles isolés des réseaux de distribution de l'énergie électrique. Ainsi, lorsque les exploitants veulent réaliser des travaux hors tension, leur protection est assurée grâce à la garantie de la bonne qualité du contact électrique. Mais il peut être bien évidemment utilisé pour tous les types de connexions électriques à perforation d'isolant par exemple pour des connexions d'un réseau sur un autre réseau ou pour des connexions de branchement d'abonnés.The connection device according to the invention finds its main application in short-circuiting or grounding of the cables isolated from the electrical energy distribution networks. When operators want to carry out work with the power off, their protection is ensured by guaranteeing the good quality of the electrical contact. However, it can obviously be used for all types of electrical connections with insulation perforation, for example for connections from one network to another network or for subscriber connection connections.

Enfin, l'invention peut être pourvue de plusieurs moyens de perforation côté connecteur permettant de dériver plusieurs câbles porteurs isolés.Finally, the invention can be provided with several perforation means on the connector side making it possible to derive several insulated carrying cables.

Claims (4)

1. A device for forming an electrical connection between a conducting cable covered with an insulating sheath and a second conductor, of the type comprising means (5a, 5b) adapted to perforate the insulating sheath of the cable under the action of a threaded clamping member (6) provided with a control head (7) which is intended to be separated from the threaded clamping member at the level of a groove (8), under the action of a clamping torque corresponding to the clamping torque required so that the perforation means pass completely through the insulating sheath, so as to ensure good electrical contact between the cable and the second conductor, and an insulating case (10) covering the perforation means and the threaded clamping member, characterized in that the groove (8) separates the control head (7) into two coaxial elements (7a, 7b), one (7a) allowing the clamping torque to be applied while the other (7b) allows disassembly or subsequent reciamping : and in that the insulating case (10) comprises a chimney (15) from which the control head (7) projects when it is not broken, as well as a removable closure cover (16) adaptable to the chimney (15) only after breakage of the control head (7) at the level of the groove (8), this cover (16) being connected to the case (10) by a flexible strip (17).
2. The device according to claim 1, characterized in that the groove (8) receives a stop (9) projecting from the lateral walls of the two elements (7a, 7b) of the control head (7).
3. Device according to claim 2, characterized in that the stop (9) is formed by a plastic material washer.
4. Device according to any one of the preceding claims, characterized in that the two elements (7a, 7b) of the control head have a hexagonal section.
EP80400680A 1979-05-23 1980-05-14 Electrical connecting device of the insulation perforation type Expired EP0020229B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80400680T ATE7344T1 (en) 1979-05-23 1980-05-14 INSULATION PERFORATED TYPE ELECTRICAL TERMINAL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7913150A FR2457578A1 (en) 1979-05-23 1979-05-23 INSULATION PERFORATION TYPE ELECTRICAL CONNECTION DEVICE
FR7913150 1979-05-23

Publications (2)

Publication Number Publication Date
EP0020229A1 EP0020229A1 (en) 1980-12-10
EP0020229B1 true EP0020229B1 (en) 1984-05-02

Family

ID=9225786

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80400680A Expired EP0020229B1 (en) 1979-05-23 1980-05-14 Electrical connecting device of the insulation perforation type

Country Status (4)

Country Link
EP (1) EP0020229B1 (en)
AT (1) ATE7344T1 (en)
DE (1) DE3067673D1 (en)
FR (1) FR2457578A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498016A2 (en) * 1981-01-09 1982-07-16 Verlant Beaurain Insulated tapping connector for cables under tension - has insulation piercing grip-screws and has rear projection allowing derivation cable to run parallel to cable under tension
FR2503807A1 (en) * 1981-04-13 1982-10-15 Verlant Et Beaurain Insulated tightening bolt for screw-fastening cable connectors - has shaft head with inserted hexagonal insulating plug preventing electrical contact with cable, and tightenable with allen key
FR2573925B1 (en) * 1984-11-29 1987-02-27 Auxiliaire Appar Electric ELECTRICAL CONNECTOR WITH INSULATION PERFORATION
FR2585192A1 (en) * 1985-07-18 1987-01-23 Auxiliaire Appar Electric Electrical connector intended for producing an electrical branch-off from a power cable formed from a conductor surrounded by an insulating jacket
GB9902358D0 (en) 1999-02-04 1999-03-24 B & H Nottingham Ltd Electrical connector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444775A (en) * 1968-02-16 1969-05-20 Lockheed Aircraft Corp Nut formed with multiple torque-off collars
GB1402280A (en) * 1972-12-04 1975-08-06 British Insulated Callenders Electric connections
GB1465907A (en) * 1973-12-10 1977-03-02 Bicc Ltd Electric connectors
DE2547634A1 (en) * 1975-10-24 1977-04-28 Bosch Gmbh Robert SAFETY DOWEL
FR2337442A1 (en) * 1975-12-29 1977-07-29 Boulay Ste Ind Screw clamp for bare conductor - has screw shank with collar that breaks off and rotates to prevent torque transfer to conductor

Also Published As

Publication number Publication date
DE3067673D1 (en) 1984-06-07
FR2457578B1 (en) 1982-12-03
EP0020229A1 (en) 1980-12-10
FR2457578A1 (en) 1980-12-19
ATE7344T1 (en) 1984-05-15

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