EP0951096B1 - Connection device and terminal fitted with such a device - Google Patents

Connection device and terminal fitted with such a device Download PDF

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Publication number
EP0951096B1
EP0951096B1 EP99410027A EP99410027A EP0951096B1 EP 0951096 B1 EP0951096 B1 EP 0951096B1 EP 99410027 A EP99410027 A EP 99410027A EP 99410027 A EP99410027 A EP 99410027A EP 0951096 B1 EP0951096 B1 EP 0951096B1
Authority
EP
European Patent Office
Prior art keywords
pad
accessory
terminal
tunnel
conductor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99410027A
Other languages
German (de)
French (fr)
Other versions
EP0951096A1 (en
Inventor
Robert Diconne
Bernard Lepretre
Didier Philippe
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.)
Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0951096A1 publication Critical patent/EP0951096A1/en
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Publication of EP0951096B1 publication Critical patent/EP0951096B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R4/58—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 characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • 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
    • H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
    • H01R4/489—Clamped connections, spring connections utilising a spring, clip, or other resilient member spring force increased by screw, cam, wedge, or other fastening means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5855—Electric connections to or between contacts; Terminals characterised by the use of a wire clamping screw or nut
    • H01H2001/5861—Box connector with a collar or lug for clamping internal rail and external conductor together by a tightening 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
    • H01R4/26—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

Definitions

  • the present invention relates to an accessory for connecting an electrical conductor such as an aluminum cable to a contact pad of an electrical appliance such as a circuit breaker, and a terminal equipped with such an accessory.
  • Conventional terminals are designed to connect copper cables to the ranges of devices such as circuit breakers, but are not suitable for connecting aluminum cables.
  • the user when he wishes to use aluminum cables, is required to replace the kit formed by the cage and the screw with another kit adapted to the connection of aluminum cables.
  • the cable is brought into contact with the beach by a steel cage moved in translation by the terminal screw.
  • the copper pad and the aluminum cage have respectively two opposite grooves forming elongate claws able to pass through the layer of alumina covering the cable, so as to improve the contact between the beach and the cage.
  • the terminal is constituted by an aluminum block comprising on the one hand an elongated passage for the passage of the track and on the other hand a threaded orifice intended for the passage of the terminal screw also made of aluminum.
  • the bottom wall of the cage has a U-shaped section so as to adapt to the shape of the cable, and the screw has a curved end so that the cable is trapped between the bottom of the cage and the screw.
  • all the components being made of aluminum there is no differential expansion. The lack of differential expansion of the various elements, and the fact that the cable is surrounded tightly satisfactorily solve the problem of expansion of aluminum cables and alumina formation on the cable.
  • the present invention solves these problems and proposes a connection accessory making it possible to use standard terminals to make the connection of aluminum cables in a simple and reliable manner.
  • connection accessory according to claim 1.
  • the aforementioned pad has a substantially U-shaped cross section.
  • This particular form of pad makes it possible to obtain a good quality of electrical contact.
  • the aforementioned pad has on its face facing the conductor, ridges extending perpendicularly to the longitudinal direction of the conductor.
  • the pad is fixed on the beach by means of a support, said support comprising an elastic blade fixed by one of its ends on the pad and having a bent portion under the pad extending substantially parallel to said pad, so as to allow the elastic clamping of the range between the pad and the curved portion.
  • the accessory being intended to be mounted in the cage of an electrical terminal, it further comprises at least one lug extending from the plane of the bent portion in a direction inclined with respect to said plane. away from the pad, said at least one leg being supported on a wall of the cage so as to absorb the differences in expansion between the various elements involved in tightening.
  • the at least one leg is integral with the blade.
  • the support comprises three legs arranged in a triangle.
  • the curved portion has on its face facing the pad a boss adapted to allow the mounting of the pad on beaches of different thicknesses.
  • the invention also relates to a terminal equipped with an accessory comprising the previously mentioned features taken alone or in combination.
  • the terminal may be of the fixed cage or mobile cage type.
  • the cage has in its bottom wall a recess adapted to receive the (the) tab (s) of an accessory.
  • a terminal 5 intended to be mounted in a housing 2 provided in the rear part of a circuit breaker 3 to make the connection of an electric cable 6 on the range 4 of the circuit breaker.
  • This terminal is formed mainly by a metal block 5 of substantially parallelepipedal shape comprising an elongate passage 5b intended to receive the aforementioned range 4, and comprises in its upper part, a threaded orifice in which is screwed a screw 7 said terminal screw adapted to tightening the cable 6 on the range 4.
  • This screw 7 is accessible from the upper part of the device and has at its end located inside the terminal 5, a shoe 8 having claws 8a for cooperate with complementary recesses 4a provided in the range 4.
  • this terminal 5 is equipped with a connection accessory 9 intended to be used to make the connection of an aluminum cable to the beach.
  • this accessory 9 comprises a shoe 10 mounted on a support 11, the assembly being intended to be resiliently fixed on the range 4 of the circuit breaker.
  • This pad 10 has a substantially U-shaped section and has on its face 14 for receiving the conductor 6, a set of ridges 12 extending perpendicular to the direction of the cable 6 when introduced into the terminal.
  • the support 11 is formed by an elastic blade fixed by one end 11b, at one end of the pad 10, and folded twice substantially at right angles so as to form a bent portion 11a extending under the pad 10 substantially parallel to the pad 10.
  • the curved portion 11a of the blade comprises three tongues or lugs 11c, 11d, 11e integrally formed with the elastic blade and extending in a direction inclined with respect to the plane of the bent part forming an angle ⁇ of about 30 ° with this plane.
  • These tabs are intended to bear at their end on the bottom wall 5c of a recess 5a provided in the terminal 5 for housing these tabs.
  • bent portion 11a has on its face facing the pad 10 a boss 11f adapted to allow both the mounting of the pad 10 in a range of 2.5 mm that a range of 1.6mm.
  • the screw 7 and its pad 8 will be made of steel, while the block 5 will be made of aluminum.
  • the blade of the support 11 will be made of stainless spring steel and riveted to the shoe 10 of the accessory, which pad will be advantageously made of tinned copper.
  • the terminal of the circuit breaker comprises a cage 13 mounted to move in translation in the terminal housing 2 of the apparatus between a disconnection position and a position in which the cage 13 makes the cable 6 tight. on the beach (not shown).
  • the block 5 is first introduced into the rear portion 3 of the apparatus by sliding said block 5 in the corresponding housing 2.
  • the accessory 9 is mounted on the 4, so that the range 4 is elastically retained between the pad 10 and the curved portion 11a of the elastic blade.
  • the conductor 6 is then introduced into the passage 5b of the block and deposited on the pad 10.
  • the screwing of the terminal screw 7 has the effect of applying the shoe 8 with claws 8a on the cable 6 and to perform the clamping of the conductor 6 on the beach 4.
  • the U-shape of the pad 10 makes it possible to contain the strands of the cable between the shoe 8 with claws of the screw 7 and the pad 10 of the accessory 9 in order to avoid their profusion.
  • the flexible tabs or tabs (11c, 11d, 11e) have the role of maintaining a constant pressure on the thread to prevent loosening of the cage screw under the effect of differences in expansion of the aluminum cable and steel cage screw. They also reduce the risk of loosening the screw under the effect of vibration.
  • connection operation by means of a device according to Figure 5 is carried out in the same manner as previously described for the first embodiment, except that it is the cage 13 which moves in translation and not the screw and which makes the tightening of the cable, which is interposed between the shoe 10 of the accessory and the cage 13.
  • This accessory makes it possible to use the standard terminals (currently provided for copper cables) for connecting the aluminum cables while maintaining a satisfactory electrical contact quality.

Description

La présente invention concerne un accessoire de raccordement d'un conducteur électrique tel un câble en aluminium à une plage de contact d'un appareil électrique tel un disjoncteur, ainsi qu'une borne équipée d'un tel accessoire.The present invention relates to an accessory for connecting an electrical conductor such as an aluminum cable to a contact pad of an electrical appliance such as a circuit breaker, and a terminal equipped with such an accessory.

Les bornes de raccordement classiques sont conçues pour réaliser le raccordement de câbles en cuivre sur les plages des appareils tels que les disjoncteurs, mais ne sont pas adaptées au raccordement de câbles en aluminium. Il en résulte que l'utilisateur, lorsqu'il souhaite utiliser des câbles en aluminium, est tenu de remplacer le kit formé par la cage et la vis par un autre kit adapté au raccordement de câbles en aluminium.Conventional terminals are designed to connect copper cables to the ranges of devices such as circuit breakers, but are not suitable for connecting aluminum cables. As a result, the user, when he wishes to use aluminum cables, is required to replace the kit formed by the cage and the screw with another kit adapted to the connection of aluminum cables.

L'une des raisons en est que l'aluminium a une forte tendance à s'oxyder à l'air libre, d'où il résulte que les câbles en aluminium pendant la durée d'utilisation se recouvrent d'alumine isolante détériorant la qualité du contact entre le câble et la plage.One of the reasons is that aluminum has a strong tendency to oxidize in the open air, resulting in aluminum cables during the service life being covered with insulating alumina deteriorating the quality. contact between the cable and the beach.

L'autre raison tient en ce que l'aluminium présente un coefficient de dilatation élevé sous l'effet des variations de température. Or, les disjoncteurs étant alimentés par des courants variables passent par des phases de chauffage et de refroidissement alterné. Il en résulte des variations de température engendrant des variations dimensionnelles des câbles par dilatation différentielle. Or, en général, les câbles sont en contact d'une part, avec la plage réalisée le plus souvent en cuivre, d'autre part, soit avec la vis en acier ,soit avec la cage réalisée également en acier. Or, ces trois matériaux présentent des coefficients de dilatation différents. Il en résulte que pendant les phases de refroidissement, ils ne se rétractent pas de la même manière. Ceci entraîne un phénomène de relâchement du serrage lequel d'une part, en soi diminue la qualité du contact électrique et d'autre part, favorise la formation d'une couche d'alumine susceptible également de détériorer le contact électrique.The other reason is that aluminum has a high coefficient of expansion due to changes in temperature. However, the circuit breakers being powered by variable currents pass through alternating heating and cooling phases. This results in temperature variations causing dimensional variations of the cables by differential expansion. However, in general, the cables are in contact on the one hand, with the beach made mostly of copper, on the other hand, either with the steel screw, or with the cage also made of steel. However, these three materials have different coefficients of expansion. As a result, during the cooling phases, they do not shrink in the same way. This causes a loosening of the clamping phenomenon which on the one hand, in itself decreases the quality of the electrical contact and on the other hand, promotes the formation of a layer of alumina may also deteriorate the electrical contact.

Plusieurs solutions ont été imaginées pour pallier ces inconvénients.Several solutions have been devised to overcome these disadvantages.

L'une de ces solutions est décrite dans le brevet allemand DE 4026037. Dans ce document, le câble est amené en contact avec la plage par une cage en acier déplacée en translation par la vis de borne. Afin de pallier au problème de l'oxydation de l'aluminium, la plage de cuivre et la cage en aluminium présentent respectivement deux stries en regard formant des griffes allongées aptes à traverser la couche d'alumine recouvrant le câble, de manière à améliorer le contact entre la plage et la cage.One of these solutions is described in DE 4026037. In this document, the cable is brought into contact with the beach by a steel cage moved in translation by the terminal screw. In order to alleviate the problem of the oxidation of aluminum, the copper pad and the aluminum cage have respectively two opposite grooves forming elongate claws able to pass through the layer of alumina covering the cable, so as to improve the contact between the beach and the cage.

Dans ce document, on a donc résolu l'un des problèmes précités par la réalisation d'un système de raccordement de câbles en aluminium spécifique, lequel de par la présence de ces griffes présente un prix de revient élevé.In this document, one of the aforementioned problems has thus been solved by the realization of a specific aluminum cable connection system, which by the presence of these claws has a high cost price.

On connaît une autre solution dans laquelle la borne est constituée par un bloc en aluminium comportant d'une part, un passage allongé pour le passage de la plage et d'autre part un orifice taraudé destiné au passage de la vis de borne réalisée également en aluminium. Dans cette réalisation, la paroi de fond de la cage présente une section en forme de U de manière à s'adapter à la forme du câble, et la vis présente une extrémité bombée de manière que le câble soit emprisonné entre le fond de la cage et la vis. Dans cette réalisation, tous les constituants étant réalisés en aluminium, il ne se produit pas de dilatation différentielle. L'absence de dilatation différentielle des différents éléments, et le fait que le câble est entouré étroitement permettent de résoudre de manière satisfaisante le problème de dilatation des câbles en aluminium et de formation d'alumine sur le câble. Cependant, cette solution présente encore certains inconvénients tenant d'une part, au fait que cette cage nécessite de présenter une épaisseur importante d'où une quantité d'alliage nécessaire importante, et d'autre part, au fait que la cage étant susceptible elle-même de s'oxyder nécessite d'être étamée. Il en résulte une borne délicate à fabriquer, onéreuse et encombrante.Another solution is known in which the terminal is constituted by an aluminum block comprising on the one hand an elongated passage for the passage of the track and on the other hand a threaded orifice intended for the passage of the terminal screw also made of aluminum. In this embodiment, the bottom wall of the cage has a U-shaped section so as to adapt to the shape of the cable, and the screw has a curved end so that the cable is trapped between the bottom of the cage and the screw. In this embodiment, all the components being made of aluminum, there is no differential expansion. The lack of differential expansion of the various elements, and the fact that the cable is surrounded tightly satisfactorily solve the problem of expansion of aluminum cables and alumina formation on the cable. However, this solution still has certain drawbacks on the one hand, the fact that this cage requires a large thickness from where a significant amount of alloy necessary, and secondly, the fact that the cage being susceptible it even to oxidize requires to be tinned. This results in a delicate terminal to manufacture, expensive and cumbersome.

La présente invention résout ces problèmes et propose un accessoire de raccordement permettant d'utiliser des bornes standards pour effectuer le raccordement de câbles en aluminium de manière simple et fiable.The present invention solves these problems and proposes a connection accessory making it possible to use standard terminals to make the connection of aluminum cables in a simple and reliable manner.

A cet effet, la présente invention a pour objet un accessoire de raccordement selon la revendication 1.For this purpose, the present invention relates to a connection accessory according to claim 1.

Ainsi, lorsqu'il est prévu de raccorder des câbles en aluminium, il n'est plus nécessaire de remplacer l'ensemble de la borne, une borne standard peut être utilisée.Thus, when it is intended to connect aluminum cables, it is no longer necessary to replace the entire terminal, a standard terminal can be used.

Selon une réalisation particulière, le patin précité présente une section transversale sensiblement en forme de U.According to a particular embodiment, the aforementioned pad has a substantially U-shaped cross section.

Cette forme particulière de patin permet d'obtenir une bonne qualité de contact électrique.This particular form of pad makes it possible to obtain a good quality of electrical contact.

Selon une caractéristique particulière, le patin précité comporte sur sa face orientée vers le conducteur, des stries s'étendant perpendiculairement à la direction longitudinale du conducteur.According to a particular characteristic, the aforementioned pad has on its face facing the conductor, ridges extending perpendicularly to the longitudinal direction of the conductor.

Selon une caractéristique particulière, le patin est fixé sur la plage par l'intermédiaire d'un support, ledit support comportant une lame élastique fixée par l'une de ses extrémités sur le patin et comportant une partie recourbée sous le patin s'étendant sensiblement parallèlement audit patin, de manière à permettre le serrage élastique de la plage entre le patin et la partie recourbée.According to a particular characteristic, the pad is fixed on the beach by means of a support, said support comprising an elastic blade fixed by one of its ends on the pad and having a bent portion under the pad extending substantially parallel to said pad, so as to allow the elastic clamping of the range between the pad and the curved portion.

Selon une autre caractéristique, l'accessoire étant destiné à être monté dans la cage d'une borne électrique, il comporte en outre au moins une patte s'étendant à partir du plan de la partie recourbée dans une direction inclinée par rapport audit plan en s'éloignant du patin, ladite au moins une patte étant en appui sur une paroi de la cage de manière à absorber les différences de dilatation entre les différents éléments participant au serrage.According to another characteristic, the accessory being intended to be mounted in the cage of an electrical terminal, it further comprises at least one lug extending from the plane of the bent portion in a direction inclined with respect to said plane. away from the pad, said at least one leg being supported on a wall of the cage so as to absorb the differences in expansion between the various elements involved in tightening.

Avantageusement, la au moins une patte est venue de matière avec la lame.Advantageously, the at least one leg is integral with the blade.

De préférence, le support comporte trois pattes disposés en triangle.Preferably, the support comprises three legs arranged in a triangle.

Avantageusement, la partie recourbée comporte sur sa face orientée vers la patin un bossage adapté à permettre le montage du patin sur des plages de différentes épaisseurs.Advantageously, the curved portion has on its face facing the pad a boss adapted to allow the mounting of the pad on beaches of different thicknesses.

L'invention a également pour objet une borne équipée d'un accessoire comportant les caractéristiques précédemment mentionnées prises seules ou en combinaison.The invention also relates to a terminal equipped with an accessory comprising the previously mentioned features taken alone or in combination.

La borne peut être du type à cage fixe ou à cage mobile.The terminal may be of the fixed cage or mobile cage type.

Avantageusement, la cage comporte dans sa paroi de fond un évidement adapté à recevoir la (les) patte(s) d'un accessoire.Advantageously, the cage has in its bottom wall a recess adapted to receive the (the) tab (s) of an accessory.

Mais d'autres avantages et caractéristiques de l'invention apparaîtront mieux dans la description qui suit et se réfère aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels:

  • La figure 1 est une vue partielle en perspective, illustrant la partie arrière d'un disjoncteur comprenant une borne équipée d'un accessoire de raccordement selon l'invention, la borne et l'accessoire étant sortis de l'appareil,
  • La figure 2 est une vue similaire à la figure 1, la borne et l'accessoire étant montés dans la partie arrière de l'appareil,
  • Les figures 3 et 4 sont des vues en perspective de l'accessoire,
  • La figure 5 est une vue en perspective similaire à la figure 1, mais illustrant une borne conforme à une autre réalisation de l'invention.
But other advantages and features of the invention will appear better in the description which follows and refers to the accompanying drawings given solely by way of example and in which:
  • FIG. 1 is a partial perspective view, illustrating the rear part of a circuit breaker comprising a terminal equipped with a connection accessory according to the invention, the terminal and the accessory being taken out of the apparatus,
  • FIG. 2 is a view similar to FIG. 1, the terminal and the accessory being mounted in the rear part of the apparatus,
  • Figures 3 and 4 are perspective views of the accessory,
  • Figure 5 is a perspective view similar to Figure 1, but illustrating a terminal according to another embodiment of the invention.

Sur les figures 1 et 2, on voit une borne 5 destinée à être montée dans un logement 2 prévu dans la partie arrière d'un disjoncteur 3 pour effectuer le raccordement d'un câble électrique 6 sur la plage 4 du disjoncteur. Cette borne est formée principalement par un bloc métallique 5 de forme sensiblement parallélépipédique comportant un passage allongé 5b destiné à recevoir la plage précitée 4, et comporte dans sa partie supérieure, un orifice taraudé dans lequel est vissée une vis 7 dite vis de borne apte à effectuer le serrage du câble 6 sur la plage 4. Cette vis 7 est accessible à partir de la partie supérieure de l'appareil et comporte à son extrémité située à l'intérieur de la borne 5, un patin 8 comportant des griffes 8a destinées à coopérer avec des évidements 4a complémentaires prévus dans la plage 4.In Figures 1 and 2, there is shown a terminal 5 intended to be mounted in a housing 2 provided in the rear part of a circuit breaker 3 to make the connection of an electric cable 6 on the range 4 of the circuit breaker. This terminal is formed mainly by a metal block 5 of substantially parallelepipedal shape comprising an elongate passage 5b intended to receive the aforementioned range 4, and comprises in its upper part, a threaded orifice in which is screwed a screw 7 said terminal screw adapted to tightening the cable 6 on the range 4. This screw 7 is accessible from the upper part of the device and has at its end located inside the terminal 5, a shoe 8 having claws 8a for cooperate with complementary recesses 4a provided in the range 4.

Selon l'invention, cette borne 5 est équipée d'un accessoire de raccordement 9 destiné à être utilisé pour effectuer le raccordement d'un câble en aluminium sur la plage.According to the invention, this terminal 5 is equipped with a connection accessory 9 intended to be used to make the connection of an aluminum cable to the beach.

Comme plus particulièrement illustré sur les figures 3 et 4, cet accessoire 9 comprend un patin 10 monté sur un support 11, l'ensemble étant destiné à être fixé élastiquement sur la plage 4 du disjoncteur. Ce patin 10 présente une section sensiblement en forme de U et comporte sur sa face 14 destinée à recevoir le conducteur 6, un ensemble de stries 12 s'étendant perpendiculairement à la direction du câble 6 lorsqu'il est introduit dans la borne.As more particularly illustrated in Figures 3 and 4, this accessory 9 comprises a shoe 10 mounted on a support 11, the assembly being intended to be resiliently fixed on the range 4 of the circuit breaker. This pad 10 has a substantially U-shaped section and has on its face 14 for receiving the conductor 6, a set of ridges 12 extending perpendicular to the direction of the cable 6 when introduced into the terminal.

Le support 11 est formé par une lame élastique fixée par l'une 11b de ses extrémités, à l'une des extrémités du patin 10, et pliée deux fois sensiblement à angle droit de manière à former une partie recourbée 11a s'étendant sous le patin 10 sensiblement parallèlement au patin 10.The support 11 is formed by an elastic blade fixed by one end 11b, at one end of the pad 10, and folded twice substantially at right angles so as to form a bent portion 11a extending under the pad 10 substantially parallel to the pad 10.

On voit également sur ces figures, que la partie recourbée 11a de la lame comporte trois languettes ou pattes 11c, 11d, 11e venues de matière avec la lame élastique et s'étendant suivant une direction inclinée par rapport au plan de la partie recourbée en formant un angle α d'environ 30° avec ce plan. Ces languettes sont destinées à venir en appui par leur extrémité sur la paroi inférieure 5c d'un évidement 5a prévu dans la borne 5 pour loger ces pattes.It can also be seen in these figures that the curved portion 11a of the blade comprises three tongues or lugs 11c, 11d, 11e integrally formed with the elastic blade and extending in a direction inclined with respect to the plane of the bent part forming an angle α of about 30 ° with this plane. These tabs are intended to bear at their end on the bottom wall 5c of a recess 5a provided in the terminal 5 for housing these tabs.

On notera également que la partie recourbée 11a comporte sur sa face orientée vers le patin 10 un bossage 11f adapté à permettre aussi bien le montage du patin 10 sur une plage de 2,5 mm que sur une plage de 1.6mm.Note also that the bent portion 11a has on its face facing the pad 10 a boss 11f adapted to allow both the mounting of the pad 10 in a range of 2.5 mm that a range of 1.6mm.

Avantageusement, la vis 7 et son patin 8 seront réalisés en acier, tandis que le bloc 5 sera réalisé en aluminium. La lame du support 11 sera réalisée en acier à ressort inoxydable et rivetée au patin 10 de l'accessoire, lequel patin sera réalisé avantageusement en cuivre étamé.Advantageously, the screw 7 and its pad 8 will be made of steel, while the block 5 will be made of aluminum. The blade of the support 11 will be made of stainless spring steel and riveted to the shoe 10 of the accessory, which pad will be advantageously made of tinned copper.

Selon la réalisation illustrée sur la figure 5, la borne du disjoncteur comprend une cage 13 montée mobile en translation dans le logement 2 de borne de l'appareil entre une position de déconnexion et une position dans laquelle la cage 13 réalise le serrage du câble 6 sur la plage (non représentée).According to the embodiment illustrated in FIG. 5, the terminal of the circuit breaker comprises a cage 13 mounted to move in translation in the terminal housing 2 of the apparatus between a disconnection position and a position in which the cage 13 makes the cable 6 tight. on the beach (not shown).

L'opération de raccordement d'un câble en aluminium sur la plage sera décrite ci-après en référence tout d'abord aux figures 1 et 2 puis à la figure 5.The operation of connecting an aluminum cable to the beach will be described hereinafter with reference firstly to FIGS. 1 and 2 and then to FIG.

Selon la réalisation illustrée sur les figures 1 et 2, le bloc 5 est tout d'abord introduit dans la partie arrière 3 de l'appareil par coulissement dudit bloc 5 dans le logement correspondant 2. Puis, l'accessoire 9 est monté sur la plage 4, de façon que la plage 4 soit retenue élastiquement entre le patin 10 et la partie recourbée 11a de la lame élastique. Le conducteur 6 est alors introduit dans le passage 5b du bloc et déposé sur le patin 10. Puis, le vissage de la vis de borne 7 a pour effet d'appliquer le patin 8 à griffes 8a sur le câble 6 et de réaliser le serrage du conducteur 6 sur la plage 4. Dans cette position de serrage, la forme en U du patin 10 permet de contenir les brins du câble entre le patin 8 à griffes de la vis 7 et le patin 10 de l'accessoire 9 afin d'éviter leur foisonnement.According to the embodiment illustrated in Figures 1 and 2, the block 5 is first introduced into the rear portion 3 of the apparatus by sliding said block 5 in the corresponding housing 2. Then, the accessory 9 is mounted on the 4, so that the range 4 is elastically retained between the pad 10 and the curved portion 11a of the elastic blade. The conductor 6 is then introduced into the passage 5b of the block and deposited on the pad 10. Then, the screwing of the terminal screw 7 has the effect of applying the shoe 8 with claws 8a on the cable 6 and to perform the clamping of the conductor 6 on the beach 4. In this clamping position, the U-shape of the pad 10 makes it possible to contain the strands of the cable between the shoe 8 with claws of the screw 7 and the pad 10 of the accessory 9 in order to avoid their profusion.

D'autre part, les pattes souples ou languettes (11c, 11d, 11e) ont pour rôle de maintenir une pression constante sur le pas de vis afin d'éviter le desserrage de la vis de cage sous l'effet des différences de dilatation du câble aluminium et de la vis de cage en acier. Elles diminuent en outre les risques de desserrage de la vis sous l'effet des vibrations.On the other hand, the flexible tabs or tabs (11c, 11d, 11e) have the role of maintaining a constant pressure on the thread to prevent loosening of the cage screw under the effect of differences in expansion of the aluminum cable and steel cage screw. They also reduce the risk of loosening the screw under the effect of vibration.

L'opération de raccordement au moyen d'un dispositif selon la figure 5 s'effectue de la même manière que précédemment décrit pour la première réalisation, à ceci près que c'est la cage 13 qui se déplace en translation et non plus la vis, et qui réalise le serrage du câble, lequel étant interposé entre le patin 10 de l'accessoire et la cage 13.The connection operation by means of a device according to Figure 5 is carried out in the same manner as previously described for the first embodiment, except that it is the cage 13 which moves in translation and not the screw and which makes the tightening of the cable, which is interposed between the shoe 10 of the accessory and the cage 13.

Cet accessoire permet d'utiliser les bornes standards (actuellement prévues pour les câbles en cuivre) pour le raccordement des câbles en aluminium tout en conservant une qualité de contact électrique satisfaisante.This accessory makes it possible to use the standard terminals (currently provided for copper cables) for connecting the aluminum cables while maintaining a satisfactory electrical contact quality.

Claims (11)

  1. Connection accessory (9) for connection of an electrical conductor such as an aluminum cable (6) to a contact strip (4) of an electrical apparatus such as a circuit breaker, comprising a pad (10) made of a conducting material, said pad being designed to be fixed in removable manner onto the contact strip (4) and to receive a conductor (6) designed to be clamped against the pad (10) by a clamping means in order to establish the electrical contact between the contact strip (4) and the cable (6), characterized in that the pad (10) is secured to the contact strip (4) by means of a support, said support comprising a flexible blade (11) fixed to the pad (10) via one of its ends (11b) and comprising a curved part (11a) underneath the pad (10) extending in a direction appreciably parallel to said pad (10), so as to enable flexible clamping of the contact strip (4) between the pad (10) and the curved part (11a).
  2. Accessory according to claim 1, characterized in that the pad (10) presents an appreciably U-shaped transverse cross-section.
  3. Accessory according to claim 1 or 2, characterized in that the above-mentioned pad (10) comprises, on its face (14) facing the conductor (6), serrations (12) extending perpendicularly to the longitudinal direction of the conductor (6).
  4. Accessory according to any one of the foregoing claims, designed to be fitted in the tunnel of an electrical terminal, characterized in that it comprises in addition at least one lug (11c, 11 d, 11e) extending from the plane of the curved part (11a) in an inclined direction with respect to the plane and in a direction away from the pad (10), said at least one lug (11c, 11d, 11e) pressing against a wall of the tunnel so as to absorb the expansion differences between the different elements taking part in clamping.
  5. Accessory according to claim 4, characterized in that the at least one lug (11c, 11d, 11e) is molded in the same material as the blade (11).
  6. Accessory according to claim 4 or 5, characterized in that the support comprises three lugs (11c, 11d, 11e) arranged in a triangle.
  7. Accessory according to any one of the claims 1 to 6, characterized in that the curved part (11a) comprises a boss (11f), on its face facing the pad (10), designed to enable the pad (10) to be fitted onto contact strips of different thicknesses.
  8. Terminal comprising a tunnel (5) equipped with an accessory (9) according to any one of the claims 1 to 7.
  9. Terminal according to claim 8, comprising a fixed tunnel (5), said tunnel (5) comprising an orifice for insertion of a clamping screw (7) for securing the conductor (6), said terminal being equipped with an accessory (9) according to any one of the claims 1 to 7.
  10. Terminal according to claim 9, comprising a movable tunnel (13) movable between a position clamping the conductor (6) onto the contact strip (4) and a disconnection position, said terminal being equipped with an accessory (9) according to any one of the claims 1 to 7.
  11. Terminal comprising a tunnel according to claim 8, characterized in that the tunnel (5) comprises a recess (5a) in its bottom wall designed to receive the lug(s) (11c, 11d, 11e) of an accessory (9) according to claim 4.
EP99410027A 1998-04-17 1999-03-31 Connection device and terminal fitted with such a device Expired - Lifetime EP0951096B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9805122 1998-04-17
FR9805122A FR2777703B1 (en) 1998-04-17 1998-04-17 CONNECTION ACCESSORY AND TERMINAL EQUIPPED WITH SUCH AN ACCESSORY

Publications (2)

Publication Number Publication Date
EP0951096A1 EP0951096A1 (en) 1999-10-20
EP0951096B1 true EP0951096B1 (en) 2006-06-14

Family

ID=9525613

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Application Number Title Priority Date Filing Date
EP99410027A Expired - Lifetime EP0951096B1 (en) 1998-04-17 1999-03-31 Connection device and terminal fitted with such a device

Country Status (15)

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US (1) US6231405B1 (en)
EP (1) EP0951096B1 (en)
CN (1) CN1147896C (en)
BR (1) BR9901276A (en)
CA (1) CA2267514C (en)
CZ (1) CZ297140B6 (en)
DE (1) DE69931838T2 (en)
EA (1) EA001671B1 (en)
ES (1) ES2264250T3 (en)
FR (1) FR2777703B1 (en)
HU (1) HUP9901206A3 (en)
ID (1) ID23603A (en)
NO (1) NO991806L (en)
PL (1) PL192765B1 (en)
ZA (1) ZA992740B (en)

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DE19951789A1 (en) * 1999-10-27 2001-05-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Connection terminal
DE10018352C1 (en) * 2000-04-13 2001-09-27 Siemens Ag Clamp arrangement with housing for automatic cut-out or fault- current (FI) circuit-breaker circuit
US9172167B2 (en) * 2004-11-20 2015-10-27 Al Cop Llc Junction failure inhibiting connector
DE202005014577U1 (en) * 2005-09-14 2005-11-10 Friedrich Göhringer Elektrotechnik GmbH Connecting terminal for a bus bar has an electrically insulated casing with an electrically conductive exposed terminal and clamping screws
US7384317B1 (en) * 2006-12-21 2008-06-10 General Electric Company Multi-terminal block for electronic devices having superimposed conductor connecting levels
FR2933242B1 (en) * 2008-06-30 2010-08-27 Schneider Electric Ind Sas ELECTRICAL SCREW TERMINAL, TERMINAL COMPRISING SUCH AN ELECTRICAL TERMINAL AND ELECTRICAL DEVICE COMPRISING SUCH A TERMINAL TERMINAL
US7909633B1 (en) * 2009-09-15 2011-03-22 Fisher-Rosemount Systems, Inc. Wire connection apparatus
DE102011081855A1 (en) * 2011-08-31 2013-02-28 Siemens Aktiengesellschaft Adapter for a clamping device
CN103177909B (en) * 2011-12-26 2016-03-30 西门子公司 Termination
CN102881528B (en) * 2012-09-25 2015-03-18 上海诺雅克电气有限公司 Circuit breaker
DE102013002009A1 (en) * 2013-02-06 2014-08-07 Abb Ag Installation switching device with connection terminal and terminal cover part
AU2013206510B2 (en) * 2013-06-25 2017-11-09 Societe Industrielle De Construction D'appareils Et De Materiel Electriques Connection nozzle for insulated electrical power supply cable and manufacturing method of this connection nozzle
DE102014213907A1 (en) * 2014-07-17 2016-01-21 Siemens Aktiengesellschaft Switch and push-on insert for a switch
FR3046702B1 (en) * 2016-01-08 2019-07-26 Tyco Electronics Services Gmbh CONNECTION TERMINAL FOR AN ELECTRIC APPARATUS EQUIPPED WITH A CLAMP OF A CLAMP OF AMAGNETIC MATERIAL
CN111478083B (en) * 2020-04-16 2021-04-20 中国电建集团贵阳勘测设计研究院有限公司 Binding post convenient to dismouting

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Also Published As

Publication number Publication date
ZA992740B (en) 1999-10-18
ES2264250T3 (en) 2006-12-16
EP0951096A1 (en) 1999-10-20
US6231405B1 (en) 2001-05-15
CZ136399A3 (en) 1999-11-17
HUP9901206A2 (en) 1999-12-28
DE69931838T2 (en) 2006-11-30
EA199900309A2 (en) 1999-10-28
FR2777703A1 (en) 1999-10-22
EA199900309A3 (en) 2000-04-24
CZ297140B6 (en) 2006-09-13
ID23603A (en) 2000-05-04
BR9901276A (en) 2000-01-11
DE69931838D1 (en) 2006-07-27
CA2267514C (en) 2007-06-19
HU9901206D0 (en) 1999-06-28
HUP9901206A3 (en) 2000-10-30
CN1147896C (en) 2004-04-28
CN1233069A (en) 1999-10-27
PL192765B1 (en) 2006-12-29
CA2267514A1 (en) 1999-10-17
FR2777703B1 (en) 2002-11-29
PL332449A1 (en) 1999-10-25
NO991806D0 (en) 1999-04-15
EA001671B1 (en) 2001-06-25
NO991806L (en) 1999-10-18

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