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EP3190664A1 - Connection terminal for electrical apparatus provided with a clamping cage made of non-magnetic material - Google Patents

Connection terminal for electrical apparatus provided with a clamping cage made of non-magnetic material Download PDF

Info

Publication number
EP3190664A1
EP3190664A1 EP17150057.2A EP17150057A EP3190664A1 EP 3190664 A1 EP3190664 A1 EP 3190664A1 EP 17150057 A EP17150057 A EP 17150057A EP 3190664 A1 EP3190664 A1 EP 3190664A1
Authority
EP
European Patent Office
Prior art keywords
clamping element
clamping
electrical
electrical conductor
configuration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17150057.2A
Other languages
German (de)
French (fr)
Other versions
EP3190664B1 (en
Inventor
Philippe Fontaine
François Fayard
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.)
TE Connectivity Services GmbH
Original Assignee
ABB Schweiz AG
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 ABB Schweiz AG filed Critical ABB Schweiz AG
Publication of EP3190664A1 publication Critical patent/EP3190664A1/en
Application granted granted Critical
Publication of EP3190664B1 publication Critical patent/EP3190664B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01R4/28—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
    • H01R4/28—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
    • H01R4/58—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/22—Bases, e.g. strip, block, panel
    • H01R9/24—Terminal blocks
    • H01R9/26—Clip-on terminal blocks for side-by-side rail- or strip-mounting

Definitions

  • the present invention relates to a connection terminal for electrical apparatus such as a terminal block or a contactor. It also relates to an electrical appliance as such.
  • connection terminal intended to be mounted in an electrically insulating housing conventionally comprises a clamping element movably mounted in the insulating housing and an actuating mechanism for moving the clamping element.
  • the clamping member is ready to receive a free end of an electrical conductor inserted into a cavity delimited by the clamping member which often adopts a cage shape. Thanks to the actuating mechanism, the clamping element can vary between a position allowing the introduction of the electrical conductor and a position in which the clamping element plates and holds the end of the electrical conductor against an electrically mounted conductive bar. in the insulating case.
  • the clamping element is made by an assembly of several parts, generally steel between them.
  • the assembly of the clamping element therefore requires several operations, which is not optimal in the context of cost reduction and simplification of assembly. There is also a risk that some of the pieces will be lost or damaged.
  • the use of steel is problematic.
  • the electrical intensity flowing in the electrical conductor and in the conductive strip may be greater than 100 A. This may result eddy currents of high intensity, likely to create a heating of the steel parts and a deformation of the clamping element may lead to a detrimental loosening of the conductive element.
  • the present invention aims to solve all or part of the disadvantages listed above.
  • connection terminal for electrical apparatus such as a terminal block or a contactor
  • a connection terminal for electrical apparatus such as a terminal block or a contactor
  • a clamping element formed in a non-magnetic material and being in the form of a cage adapted to receive the end of an electrical conductor inserted in the clamping member, and actuating members for varying the clamping member between a loosening configuration in which the end of the electrical conductor can freely be inserted into the element clamping or withdrawing out of the clamping member and a clamping configuration in which the end of the electrical conductor previously inserted into the clamping member is held in place by clamping between the clamping member and a conductive bar of the electrical apparatus for making electrical contact between the conductive bar and the end of the electrical conductor, in lacquer lle the clamping element is constituted by a single piece piece.
  • connection terminal 10 for electrical apparatus.
  • the connection terminal 10 has the function of establishing and maintaining physical and electrical contact between an electrical conductor 13 inserted on the one hand in the connection terminal 10 and on the other hand a conductive strip 11 of the electrical apparatus formed in an electrically conductive material.
  • the electrical apparatus may in particular be of the electric switch type with an operating element for establishing or interrupting electrical continuity, or of the terminal block type.
  • the electrical apparatus may be configured to removably attach to a mounting rail on which a plurality of electrical appliances may be mounted side by side, the electrical appliances being identical or not to each other.
  • connection terminal 10 comprises a clamping element 12 formed in a non-magnetic material, which makes it possible to avoid or limit the formation of eddy currents evoked in relation with the state of the art presented previously, even in the particular case. targeted applications of high power that involve the presence of an electrical current flowing in the electrical conductor 13 and in the conductive strip 11 greater than 100A.
  • the clamping element 12 is in the form of a cage adapted to receive the end of an electrical conductor 13 inserted in the clamping element 12.
  • the term "cage” is to be interpreted with a very broad meaning, in that it is an element defining a cavity open or not, through or not, adapted to receive ends of electrical conductors that can have different shapes, different dimensions, in particular different diameters or different lengths.
  • the clamping element 12 is constituted by a single piece. This eliminates assembly and manufacturing issues, which in turn reduces costs and improves reliability while improving magnetic properties, to avoid eddy currents as much as possible in high power applications (including electric current flowing in the electrical conductor 13 concerned and in the electrical strip 11 having an intensity greater than 100A) particularly targeted as a field of application to the invention.
  • the arrangement of a clamping element of non-magnetic material and in the form of a single piece and monobloc provides in practice better magnetic properties than a multi-piece assembly by avoiding magnetic discontinuities or even voluntary contact breaks or not .
  • the non-magnetic material is configured so that the clamping element 12 has a state of spatial deformation, under the effect of the heat resulting from the magnetic field induced by an electrical intensity greater than 100A flowing in the electrical conductor 13. , such that a withdrawal of the end of the electrical conductor 13 from the clamping element 12 in the clamping configuration is inhibited by the clamping member 12.
  • the one-piece clamping element has a deformation rate (under the effect of the heating that results from this intensity) ensuring the maintenance of the electrical conductor below a given limit value of axial withdrawal force.
  • the non-magnetic material of the clamping element is adapted so as to fulfill the function of presenting a state of spatial deformation ensuring the inhibition by the clamping element of the withdrawal of the electrical conductor out of the element. when such conditions where an electrical current greater than 100A flows in the electrical conductor are applied.
  • this adaptation of the nonmagnetic material may depend on the shape of the clamping element, its thickness, or the maximum value of the withdrawal force that the clamping element must inhibit.
  • the adaptation of the non-magnetic material according to these characteristics can be performed by numerical simulation and the skilled person is quite able to search for the non-magnetic material according to the dimensional or functional characteristics that are attributed to the clamping element.
  • the organization of the clamping element in the form of a single monoblock piece not only makes it more economical, more reliable, simpler and less risky in terms of loss or deterioration, but also makes it possible to have a capacity to deform significantly less to improve the axial strength of the electrical conductor.
  • the non-magnetic material is a copper-based alloy, aluminum or an aluminum-based alloy, which in practice gives very good results.
  • clamping element 12 as shown here can be manufactured by any method and process suitable for the purpose and the desired result, the single piece in which the clamping element 12 is formed can advantageously be obtained by a simple extrusion operation, which makes the manufacturing and obtaining very simple, and inexpensive.
  • the clamping element 12 is in the form of a profile portion having a closed contour section.
  • the section of each clamping member 12 may be in the form of a ring or a ring, exactly circular or not, for example in a slightly oblong shape, elongate in a direction corresponding substantially to the direction in which the clamping element 12 is intended to clamp the electrical conductor 13 and the conductive strip 11.
  • Such a closed form of the section allows the clamping member 12 to have very good magnetic characteristics, significantly greater than an open-form section or a multi-piece clamping member. between them, allowing it in particular to present very small eddy currents even when the electrical intensity is greater than 100A in the electrical conductor 13 clamped by this clamping element 12 and in the conductive strip 11.
  • the cutting section refers to the section considered perpendicular to the direction in which the clamping member 12 has been extruded.
  • the thickness of the clamping element 12 is, at least locally, between 2 and 4 mm.
  • This dimensional characteristic in addition to the use of a non-magnetic material and optionally of the characteristic linked to the closed shape of the section of the clamping element 12, makes it possible to limit even more the effects of heating and deformation of the clamping member 12 even when an electrical current greater than 100A is circulating in the electrical conductor 13.
  • the electrical apparatus comprises an insulating housing 14 electrically formed in any suitable material such as for example a plastic material for ease of manufacture by injection. At least one connection terminal 10 is mounted in the electrical apparatus, depending on the number of electrical conductors 13 to be connected. In the example illustrated, the electrical apparatus comprises two separate connection terminals 10, independent of one another. The two connection terminals 10 allow the electrical connection to the conductive strip 11 of two electrical conductors 13 identical or different. Each of the two connection terminals 10 is intended to receive, in this case, the end of a corresponding electrical conductor 13 (see FIG. figure 1 ).
  • the insulating housing 14 may be one-piece, or, as illustrated, constituted by the assembly of several parts: in the example shown, the insulating housing 14 comprises two parts 14a, 14b assembled to each other so that dismountable in a direction of assembly generally perpendicular to the direction of insertion of the electrical conductors 13 in the two connection terminals 10.
  • the attachment of the two parts 14a, 14b can be done by snapping, by means of screws, or everywhere else equivalent way.
  • the insulating housing 14 comprises at least one receiving orifice 15 of a first type in which the end of an electrical conductor 13 is threaded until it is inserted into the clamping element 12 and at least one orifice of receiving 16 of a second type allowing the insertion of another electrical conductor (not shown) into the insulating housing 14, different from the electrical conductor (s) 13.
  • the electrical apparatus comprises at least one branch bar 17 configured to electrically connect the conductive strip 11 and the electrical conductor inserted into the receiving port 16 of the second type.
  • the insulating housing 14 comprises two receiving ports 15 of the first type arranged on opposite sides of the insulating housing 14 opposite. These two receiving orifices 15 according to the first type make it possible to receive the two electrical conductors 13 which come to connect in the two connection terminals 10 which comprises the electrical apparatus, housed in the insulating housing 14.
  • Each receiving orifice 15 of the first type may comprise a protective cover (not shown) intended to close the receiving orifice 15 of the first type that it equips before insertion by insertion of the electrical conductor 13.
  • the insulating housing 14 also comprises two receiving orifices 16 according to the second type, also arranged on the same two opposite lateral sides of the insulating housing 14, each being located just above a receiving orifice 15 of the first type, as well as two shunt strips 17 distinct from each other and distinct from the bar 11.
  • the two receiving orifices 16 according to the second type can receive two unrepresented electrical conductors, different from the electrical conductors identified 13, which come into contact with the branch strips 17 to establish an electrical connection with the conductive strip 11.
  • connection terminals 10 and the conductive strip 11 as well as the branch strips 17 are concretely mounted in one of the two parts 14a, 14b of the insulating housing 14 before the two parts 14a, 14b of the insulating housing 14 are assembled together.
  • the figure 2 shows the situation after the assembly of the two parts 14a, 14b of the insulating housing 14 between them, before the introduction of the electrical conductors 13 visible on the figure 1 .
  • the figure 1 on which the portion 14b of the insulating housing 14 is absent, shows the particular situation where the clamping element 12 of the connection terminal 10 on the left adopts its clamping configuration while the clamping element 12 of the connection terminal 10 right is in its loosening configuration.
  • the two electrical conductors 13 intended to be connected to the conductive strip 11 via the two connection terminals 10 are different from each other: the diameter of the end of the right electrical conductor 13 which cooperates with the clamping element 12 of the connection terminal 10 on the right in its loosening configuration is very much greater than the diameter of the end of the electrical conductor 13 of the left which cooperates with the clamping element 12 of the connection terminal 10 of the left in its tightening configuration.
  • connection terminal 10 is configured so that in the clamping configuration of the clamping element 12, the end of the electrical conductor 13 previously inserted into the clamping element 12 in its loosening configuration is held in place by clamping. between the clamping element 12 and the conductive strip 11 mounted in the insulating housing 14 in order to establish an electrical contact between the conductive strip 11 and the end of the electrical conductor 13.
  • the dimensions of the inner part of the clamping element 12 intended to receive the end of the electrical conductors 13 and the conductive strip 11, as well as the organization of the actuating elements 18, are configured to admit cooperation with ends of electrical conductors 13 having a diameter within a predetermined value range.
  • clamping element 12 of each of the two connection terminals 10 in one or other of its configurations is practiced by a corresponding and adapted manipulation of the actuating elements 18 concerned.
  • the change from one configuration to the other of the clamping element 12 is practiced by an overall displacement of the clamping element 12 with respect to the insulating housing 14 in which the clamping element 12 is slidably mounted between a first position corresponding to the loosening configuration and a second position different from the first position and corresponding to the clamping configuration.
  • Each clamping element 12 is housed and mounted with a sliding possibility. in a corresponding housing 19 delimited by the insulating housing 14.
  • the sliding movement may be rectilinear or not, depending on the shape and organization of the housing 19, which provides the guiding function of the clamping element 12 during its movement.
  • the insulating housing 14 thus delimits two housings 19 in which are slidably mounted the two clamping elements 12 of the two connection terminals 10.
  • the receiving orifice 15 of the first type opens into the corresponding housing 19.
  • the clamping element 12 of the left connection terminal 10 is in its second position while the clamping element 12 of the right connection terminal 10 is in its first position.
  • the positions are reversed for the two clamping elements 12 with respect to the positions adopted on the figure 1 .
  • each clamping element could be done by any other means, such as for example by a possible change in the shape of the clamping element 12.
  • the actuating elements 18 comprise at least one screw element such as a screw or a bolt, operable from the outside of the insulating housing 14 and ensuring the variation of the clamping element 12 between the first position and the second position and vice versa when this screw element is screwed or unscrewed.
  • the actuating elements 18 may, however, be constituted by any other equivalent and adapted means, in particular as a function of the manner in which the change of the clamping element 12 takes place from one configuration to another.
  • the clamping element 12 may comprise a complementary screwing element adapted to cooperate with the screwing element of the actuating elements 18.
  • the complementary screwing element may be a threaded orifice secured to the clamping element 12, in which is engaged the screw.
  • the passage from one configuration to another of the clamping element 12 can be achieved by an elastic member such as a spring configured for this purpose and housed in the insulating housing 14 .
  • the invention also relates to an electrical apparatus as such, configured to constitute in particular a terminal block or a contactor as it has already been indicated.

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  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

Une borne de connexion (10) pour appareil électrique tel qu'un bloc de jonction ou un contacteur, comprend un élément de serrage (12) formé dans un matériau amagnétique et se présentant sous la forme d'une cage apte à recevoir l'extrémité d'un conducteur électrique (13) insérée dans l'élément de serrage (12). La borne de connexion comprend aussi des éléments d'actionnement (18) permettant de faire varier l'élément de serrage (12) entre une configuration de desserrage dans laquelle l'extrémité du conducteur électrique (13) peut librement être insérée dans l'élément de serrage (12) ou être retirée hors de l'élément de serrage (12) et une configuration de serrage dans laquelle l'extrémité du conducteur électrique (13) préalablement insérée dans l'élément de serrage (12) est maintenue en place par serrage entre l'élément de serrage (12) et une barrette conductrice (11) de l'appareil électrique afin d'établir un contact électrique entre la barrette conductrice (11) et l'extrémité du conducteur électrique (13).

Figure imgaf001
A connection terminal (10) for electrical apparatus such as a terminal block or a contactor comprises a clamping element (12) formed of a non-magnetic material and in the form of a cage adapted to receive the end an electrical conductor (13) inserted in the clamping element (12). The connection terminal also comprises actuating elements (18) for varying the clamping element (12) between a loosening configuration in which the end of the electrical conductor (13) can freely be inserted into the element clamping element (12) or being withdrawn from the clamping element (12) and a clamping configuration in which the end of the electrical conductor (13) previously inserted in the clamping element (12) is held in place by clamping between the clamping member (12) and a conductive bar (11) of the electrical apparatus to establish electrical contact between the conductive bar (11) and the end of the electrical conductor (13).
Figure imgaf001

Description

La présente invention concerne une borne de connexion pour appareil électrique tel qu'un bloc de jonction ou un contacteur. Elle concerne également un appareil électrique en tant que tel.The present invention relates to a connection terminal for electrical apparatus such as a terminal block or a contactor. It also relates to an electrical appliance as such.

De manière connue, une borne de connexion destinée à être montée dans un boitier électriquement isolant comprend classiquement un élément de serrage monté de manière déplaçable dans le boitier isolant ainsi qu'un mécanisme d'actionnement pour déplacer l'élément de serrage.In known manner, a connection terminal intended to be mounted in an electrically insulating housing conventionally comprises a clamping element movably mounted in the insulating housing and an actuating mechanism for moving the clamping element.

L'élément de serrage est prêt à recevoir une extrémité libre d'un conducteur électrique insérée dans une cavité délimitée par l'élément de serrage qui adopte souvent une forme de cage. Grâce au mécanisme d'actionnement, l'élément de serrage peut varier entre une position permettant la mise en place du conducteur électrique et une position dans laquelle l'élément de serrage plaque et maintient l'extrémité du conducteur électrique contre une barrette conductrice électriquement montée dans le boitier isolant.The clamping member is ready to receive a free end of an electrical conductor inserted into a cavity delimited by the clamping member which often adopts a cage shape. Thanks to the actuating mechanism, the clamping element can vary between a position allowing the introduction of the electrical conductor and a position in which the clamping element plates and holds the end of the electrical conductor against an electrically mounted conductive bar. in the insulating case.

Dans les solutions existantes, l'élément de serrage est réalisé par un assemblage de plusieurs pièces, généralement en acier entre elles. L'assemblage de l'élément de serrage réclame donc plusieurs opérations, ce qui n'est pas optimal dans la cadre de la réduction des coûts et d'une simplification de montage. II existe aussi un risque de voir certaines des pièces être perdues ou détériorées.In existing solutions, the clamping element is made by an assembly of several parts, generally steel between them. The assembly of the clamping element therefore requires several operations, which is not optimal in the context of cost reduction and simplification of assembly. There is also a risk that some of the pieces will be lost or damaged.

Par ailleurs, l'utilisation d'acier est problématique. Dans les applications de fortes puissances, par exemple dans le cas d'un appareil électrique de type contacteur ou terminal de puissance, l'intensité électrique circulant dans le conducteur électrique et dans la barrette conductrice peut être supérieure à 100 A. II peut en résulter des courants de Foucault de forte intensité, susceptibles de créer un échauffement des pièces en acier et une déformation de l'élément de serrage pouvant conduire à un desserrage préjudiciable de l'élément conducteur.In addition, the use of steel is problematic. In high power applications, for example in the case of an electric appliance of the contactor or power terminal type, the electrical intensity flowing in the electrical conductor and in the conductive strip may be greater than 100 A. This may result eddy currents of high intensity, likely to create a heating of the steel parts and a deformation of the clamping element may lead to a detrimental loosening of the conductive element.

D'autre part, il est nécessaire de limiter l'épaisseur des pièces en acier pour contenir les courants de Foucault en dessous de certaines limites afin d'éviter les problématiques ci-dessous, ce qui renforce l'obligation de recours à un élément de serrage de type multi-pièces assemblées entre elles.On the other hand, it is necessary to limit the thickness of the steel parts to contain the eddy currents below certain limits in order to avoid the problems below, which reinforces the obligation to use an element of clamping of multi-piece type assembled together.

Les documents EP0687032A1 et FR2786611A1 décrivent des solutions où l'élément de serrage est au moins partiellement réalisé en matériau amagnétique mais une fois encore l'élément de serrage est à chaque fois réalisé par un assemblage complexe et onéreux de plusieurs pièces entre elles, avec en outre les mêmes risques dans le temps.The documents EP0687032A1 and FR2786611A1 describe solutions where the clamping element is at least partially made of non-magnetic material but once again the clamping element is each time made by a complex and expensive assembly of several parts together, with furthermore the same risks in the weather.

La présente invention vise à résoudre tout ou partie des inconvénients listés ci-dessus.The present invention aims to solve all or part of the disadvantages listed above.

Dans ce contexte, il existe un besoin de fournir une borne de connexion pour appareil électrique qui soit simplifiée, facilite le montage et moins onéreuse tout en améliorant son aptitude de fonctionnement dans les applications de hautes puissances.In this context, there is a need to provide an electrical device connection terminal that is simplified, easier to mount and less expensive while improving its operability in high power applications.

A cet effet, il est proposé une borne de connexion pour appareil électrique tel qu'un bloc de jonction ou un contacteur, comprenant un élément de serrage formé dans un matériau amagnétique et se présentant sous la forme d'une cage apte à recevoir l'extrémité d'un conducteur électrique insérée dans l'élément de serrage, et des éléments d'actionnement permettant de faire varier l'élément de serrage entre une configuration de desserrage dans laquelle l'extrémité du conducteur électrique peut librement être insérée dans l'élément de serrage ou être retirée hors de l'élément de serrage et une configuration de serrage dans laquelle l'extrémité du conducteur électrique préalablement insérée dans l'élément de serrage est maintenue en place par serrage entre l'élément de serrage et une barrette conductrice de l'appareil électrique afin d'établir un contact électrique entre la barrette conductrice et l'extrémité du conducteur électrique, dans laquelle l'élément de serrage est constitué par une pièce unique monobloc.For this purpose, it is proposed a connection terminal for electrical apparatus such as a terminal block or a contactor, comprising a clamping element formed in a non-magnetic material and being in the form of a cage adapted to receive the end of an electrical conductor inserted in the clamping member, and actuating members for varying the clamping member between a loosening configuration in which the end of the electrical conductor can freely be inserted into the element clamping or withdrawing out of the clamping member and a clamping configuration in which the end of the electrical conductor previously inserted into the clamping member is held in place by clamping between the clamping member and a conductive bar of the electrical apparatus for making electrical contact between the conductive bar and the end of the electrical conductor, in lacquer lle the clamping element is constituted by a single piece piece.

L'invention sera bien comprise à l'aide de la description qui suit de modes particuliers de réalisation de l'invention donnés à titre d'exemples non limitatifs et représentés sur les dessins annexés, dans lesquels :

  • La figure 1 est une vue en perspective d'une partie d'un exemple d'appareil électrique équipé de deux bornes de connexion selon l'invention respectivement dans une configuration de serrage et dans une configuration de desserrage et coopérant avec des extrémités de deux conducteurs électriques de diamètres différents.
  • La figure 2 est une vue de côté de l'appareil électrique de la figure 1, avant la mise en place des conducteurs électriques visibles sur la figure 1.
  • La figure 3 est une vue de face illustrant la même partie d'appareil électrique que la figure 1, mais avant la mise en place des conducteurs électriques et en illustrant des configurations inversées pour les deux bornes de connexion par rapport à la figure 1.
The invention will be better understood from the following description of particular embodiments of the invention given by way of non-limiting example and shown in the accompanying drawings, in which:
  • The figure 1 is a perspective view of a portion of an example of an electrical apparatus equipped with two connection terminals according to the invention respectively in a clamping configuration and in a loosening configuration and cooperating with ends of two electrical conductors of diameters different.
  • The figure 2 is a side view of the electrical apparatus of the figure 1 , before the installation of the visible electrical conductors on the figure 1 .
  • The figure 3 is a front view illustrating the same part of electrical apparatus as the figure 1 , but before the introduction of the electrical conductors and illustrating inverted configurations for the two connection terminals with respect to the figure 1 .

En référence aux figures 1 à 3 annexées telles que présentées sommairement ci-dessus, l'invention concerne essentiellement une borne de connexion 10 pour appareil électrique. Au sein de l'appareil électrique, et comme il le sera détaillé plus en détails ci-dessous, la borne de connexion 10 a pour fonction d'établir et de maintenir un contact physique et électrique entre d'une part un conducteur électrique 13 inséré dans la borne de connexion 10 et d'autre part une barrette conductrice 11 de l'appareil électrique formée dans un matériau électriquement conducteur. L'appareil électrique peut notamment être de type contacteur électrique avec un élément de manoeuvre pour établir ou interrompre une continuité électrique, ou de type bloc de jonction. L'appareil électrique peut être configuré pour venir se fixer de manière démontable sur un rail de fixation sur lequel plusieurs appareils électriques peuvent être montés côte à côte, ces appareils électriques étant identiques ou non entre eux.With reference to Figures 1 to 3 appended hereto as summarized above, the invention essentially relates to a connection terminal 10 for electrical apparatus. Within the electrical apparatus, and as will be detailed in more detail below, the connection terminal 10 has the function of establishing and maintaining physical and electrical contact between an electrical conductor 13 inserted on the one hand in the connection terminal 10 and on the other hand a conductive strip 11 of the electrical apparatus formed in an electrically conductive material. The electrical apparatus may in particular be of the electric switch type with an operating element for establishing or interrupting electrical continuity, or of the terminal block type. The electrical apparatus may be configured to removably attach to a mounting rail on which a plurality of electrical appliances may be mounted side by side, the electrical appliances being identical or not to each other.

La borne de connexion 10 comprend un élément de serrage 12 formé dans un matériau amagnétique, ce qui permet d'éviter ou de limiter la formation de courants de Foucault évoqués en relation avec l'état de la technique présenté précédemment, même dans le cas particulièrement visé des applications de fortes puissances qui impliquent la présence d'une intensité électrique circulant dans le conducteur électrique 13 et dans la barrette conductrice 11 supérieure à 100A.The connection terminal 10 comprises a clamping element 12 formed in a non-magnetic material, which makes it possible to avoid or limit the formation of eddy currents evoked in relation with the state of the art presented previously, even in the particular case. targeted applications of high power that involve the presence of an electrical current flowing in the electrical conductor 13 and in the conductive strip 11 greater than 100A.

L'élément de serrage 12 se présente sous la forme d'une cage apte à recevoir l'extrémité d'un conducteur électrique 13 insérée dans l'élément de serrage 12. Le terme « cage » est à interpréter avec une acception très large, en ce sens qu'il s'agit d'un élément délimitant une cavité ouverte ou non, traversante ou non, adaptée à la réception d'extrémités de conducteurs électriques pouvant avoir différentes formes, différentes dimensions, en particulier différents diamètres ou différentes longueurs.The clamping element 12 is in the form of a cage adapted to receive the end of an electrical conductor 13 inserted in the clamping element 12. The term "cage" is to be interpreted with a very broad meaning, in that it is an element defining a cavity open or not, through or not, adapted to receive ends of electrical conductors that can have different shapes, different dimensions, in particular different diameters or different lengths.

Chaque borne de connexion 10 comprend aussi des éléments d'actionnement 18 permettant de faire varier l'élément de serrage 12 de cette borne de connexion 10 entre :

  • une configuration de desserrage dans laquelle l'extrémité du conducteur électrique 13 peut librement être insérée dans l'élément de serrage 12 ou être retirée hors de l'élément de serrage 12,
  • et une configuration de serrage dans laquelle l'extrémité du conducteur électrique 13 préalablement insérée dans l'élément de serrage 12 est maintenue en place par serrage entre l'élément de serrage 12 et la barrette conductrice 11 afin d'établir un contact électrique entre la barrette conductrice 11 et l'extrémité du conducteur électrique 13.
Each connection terminal 10 also comprises actuating elements 18 making it possible to vary the clamping element 12 of this connection terminal 10 between:
  • a loosening configuration in which the end of the electrical conductor 13 can freely be inserted into the clamping element 12 or removed from the clamping element 12,
  • and a clamping configuration in which the end of the electrical conductor 13 previously inserted in the clamping element 12 is held in place by clamping between the clamping element 12 and the conductive strip 11 in order to establish an electrical contact between the conductive strip 11 and the end of the electrical conductor 13.

De manière très avantageuse pour répondre aux problèmes présentés en relation avec l'art antérieur, l'élément de serrage 12 est constitué par une pièce unique monobloc. Cela permet de supprimer les problématiques d'assemblage et de fabrication, ce qui en outre diminue les coûts et améliore la fiabilité tout en améliorant les propriétés magnétiques, pour éviter autant que possible les courants de Foucault dans les applications de hautes puissances (avec notamment un courant électrique circulant dans le conducteur électrique 13 concerné et dans la barrette électrique 11 ayant une intensité supérieure à 100A) particulièrement visées comme domaine d'application à l'invention.Very advantageously to meet the problems presented in relation with the prior art, the clamping element 12 is constituted by a single piece. This eliminates assembly and manufacturing issues, which in turn reduces costs and improves reliability while improving magnetic properties, to avoid eddy currents as much as possible in high power applications (including electric current flowing in the electrical conductor 13 concerned and in the electrical strip 11 having an intensity greater than 100A) particularly targeted as a field of application to the invention.

L'agencement d'un élément de serrage en matériau amagnétique et sous la forme d'une pièce unique et monobloc apporte en pratique de meilleures propriétés magnétiques qu'un ensemble multi-pièces en évitant les discontinuités magnétiques voire des ruptures de contact volontaires ou non.The arrangement of a clamping element of non-magnetic material and in the form of a single piece and monobloc provides in practice better magnetic properties than a multi-piece assembly by avoiding magnetic discontinuities or even voluntary contact breaks or not .

De manière générale, le matériau amagnétique est configuré de sorte que l'élément de serrage 12 présente un état de déformation spatiale, sous l'effet de la chaleur résultant du champ magnétique induit par une intensité électrique supérieure à 100A circulant dans le conducteur électrique 13, tel qu'un retrait de l'extrémité du conducteur électrique 13 hors de l'élément de serrage 12 en configuration de serrage est inhibé par l'élément de serrage 12. Ainsi, il est recherché que lorsqu'il circule une intensité supérieure à 100A, l'élément de serrage monobloc présente un taux de déformation (sous l'effet de l'échauffement qui résulte de cette intensité) garantissant le maintien du conducteur électrique en dessous d'une valeur limite donnée d'effort de retrait axial.In general, the non-magnetic material is configured so that the clamping element 12 has a state of spatial deformation, under the effect of the heat resulting from the magnetic field induced by an electrical intensity greater than 100A flowing in the electrical conductor 13. , such that a withdrawal of the end of the electrical conductor 13 from the clamping element 12 in the clamping configuration is inhibited by the clamping member 12. Thus, it is desired that when circulating an intensity greater than 100A, the one-piece clamping element has a deformation rate (under the effect of the heating that results from this intensity) ensuring the maintenance of the electrical conductor below a given limit value of axial withdrawal force.

Autrement dit, le matériau amagnétique de l'élément de serrage est adapté de manière à pouvoir remplir la fonction qui consiste à présenter un état de déformation spatiale assurant l'inhibition par l'élément de serrage du retrait du conducteur électrique hors de l'élément de serrage, lorsque de telles conditions où une intensité électrique supérieure à 100A circule dans le conducteur électrique sont appliquées. En pratique, cette adaptation du matériau amagnétique peut dépendre de la forme de l'élément de serrage, de son épaisseur, ou encore de la valeur maximale de l'effort de retrait que l'élément de serrage doit inhiber. Notamment, l'adaptation du matériau amagnétique en fonction de ces caractéristiques peut être réalisée par simulation numérique et l'Homme du Métier est tout à fait à-même de rechercher le matériau amagnétique en fonction des caractéristiques dimensionnelles ou fonctionnelles qui sont attribuées à l'élément de serrage.In other words, the non-magnetic material of the clamping element is adapted so as to fulfill the function of presenting a state of spatial deformation ensuring the inhibition by the clamping element of the withdrawal of the electrical conductor out of the element. when such conditions where an electrical current greater than 100A flows in the electrical conductor are applied. In practice, this adaptation of the nonmagnetic material may depend on the shape of the clamping element, its thickness, or the maximum value of the withdrawal force that the clamping element must inhibit. In particular, the adaptation of the non-magnetic material according to these characteristics can be performed by numerical simulation and the skilled person is quite able to search for the non-magnetic material according to the dimensional or functional characteristics that are attributed to the clamping element.

II est d'ailleurs précisé que le fait de prévoir un élément de serrage constitué par une pièce unique monobloc d'un seul tenant permet à ce dernier d'être beaucoup moins sujet à déformation lorsque il a tendance à s'échauffer sous l'effet de la circulation d'une intensité électrique supérieure à 100A qu'un élément de serrage de même encombrement mais agencé sous la forme d'une assemblage multi-pièces.It is moreover specified that the fact of providing a clamping element consisting of a single integral monoblock piece allows the latter to be much less subject to deformation when it tends to heat up under the effect. the circulation of an electrical intensity greater than 100A that a clamping element of the same size but arranged in the form of a multi-piece assembly.

Ainsi, l'organisation de l'élément de serrage sous la forme d'une pièce unique monobloc permet non seulement d'être plus économique, plus fiable, plus simple et moins risquée en terme de perte ou de détérioration mais permet en outre d'avoir une capacité à se déformer nettement moins afin d'améliorer la tenue axiale du conducteur électrique.Thus, the organization of the clamping element in the form of a single monoblock piece not only makes it more economical, more reliable, simpler and less risky in terms of loss or deterioration, but also makes it possible to have a capacity to deform significantly less to improve the axial strength of the electrical conductor.

Notamment, le matériau amagnétique est un alliage à base de cuivre, de l'aluminium ou un alliage à base d'aluminium, ce qui en pratique confère de très bons résultats.In particular, the non-magnetic material is a copper-based alloy, aluminum or an aluminum-based alloy, which in practice gives very good results.

Bien que l'élément de serrage 12 tel que présenté ici puisse être fabriqué par toute méthode et tout procédé adaptés au but et au résultat recherchés, la pièce unique monobloc dans laquelle est constitué l'élément de serrage 12 peut avantageusement être obtenue par une simple opération d'extrusion, ce qui rend la fabrication et l'obtention très simples, et peu onéreuse.Although the clamping element 12 as shown here can be manufactured by any method and process suitable for the purpose and the desired result, the single piece in which the clamping element 12 is formed can advantageously be obtained by a simple extrusion operation, which makes the manufacturing and obtaining very simple, and inexpensive.

Selon un mode de réalisation particulier non limitatif, et de la manière représentée, l'élément de serrage 12 se présente sous la forme d'une partie de profilé ayant une section à contour fermé. Ainsi, la section de chaque élément de serrage 12 peut se présenter sous la forme d'un anneau ou d'une bague, exactement circulaire ou non, par exemple sous une forme légèrement oblongue, allongée dans une direction correspondant sensiblement à la direction dans laquelle l'élément de serrage 12 est destiné à assurer le serrage du conducteur électrique 13 et de la barrette conductrice 11.According to a particular nonlimiting embodiment, and in the manner shown, the clamping element 12 is in the form of a profile portion having a closed contour section. Thus, the section of each clamping member 12 may be in the form of a ring or a ring, exactly circular or not, for example in a slightly oblong shape, elongate in a direction corresponding substantially to the direction in which the clamping element 12 is intended to clamp the electrical conductor 13 and the conductive strip 11.

Une telle forme fermée de la section permet à l'élément de serrage 12 de présenter de très bonnes caractéristiques magnétiques, nettement supérieure à une section de forme ouverte ou un élément de serrage en plusieurs pièces assemblées entre elles, lui permettant notamment de présenter de très faibles courants de Foucault même lorsque l'intensité électrique est supérieure à 100A dans le conducteur électrique 13 serré par cet élément de serrage 12 et dans la barrette conductrice 11.Such a closed form of the section allows the clamping member 12 to have very good magnetic characteristics, significantly greater than an open-form section or a multi-piece clamping member. between them, allowing it in particular to present very small eddy currents even when the electrical intensity is greater than 100A in the electrical conductor 13 clamped by this clamping element 12 and in the conductive strip 11.

Lorsque l'élément de serrage 12 est obtenu par extrusion, la section de coupe s'entend de la section considérée perpendiculairement à la direction suivant laquelle l'élément de serrage 12 a été extrudé.When the clamping member 12 is obtained by extrusion, the cutting section refers to the section considered perpendicular to the direction in which the clamping member 12 has been extruded.

De manière très avantageuse, l'épaisseur de l'élément de serrage 12 est, au moins localement, comprise entre 2 et 4 mm.Very advantageously, the thickness of the clamping element 12 is, at least locally, between 2 and 4 mm.

Cette caractéristique dimensionnelle, en complément de l'utilisation d'un matériau amagnétique et optionnellement de la caractéristique liée à la forme fermée de la section de l'élément de serrage 12, permet de limiter encore plus les effets d'échauffements et de déformation de l'élément de serrage 12 même lorsqu'il circule une intensité électrique supérieure à 100A dans le conducteur électrique 13.This dimensional characteristic, in addition to the use of a non-magnetic material and optionally of the characteristic linked to the closed shape of the section of the clamping element 12, makes it possible to limit even more the effects of heating and deformation of the clamping member 12 even when an electrical current greater than 100A is circulating in the electrical conductor 13.

L'appareil électrique comprend un boitier isolant 14 électriquement formé dans tout matériau adapté comme par exemple une matière plastique pour de simplicité de fabrication par injection. Au moins une borne de connexion 10 est montée dans l'appareil électrique, en fonction du nombre de conducteurs électriques 13 à raccorder. Dans l'exemple illustré, l'appareil électrique comprend deux bornes de connexion 10 distinctes, indépendantes l'une de l'autre. Les deux bornes de connexion 10 permettent le raccordement électrique à la barrette conductrice 11 de deux conducteurs électrique 13 identiques ou non. Chacune des deux bornes de connexion 10 est destinée à recevoir, dans ce cas, l'extrémité d'un conducteur électrique 13 correspondant (voir la figure 1).The electrical apparatus comprises an insulating housing 14 electrically formed in any suitable material such as for example a plastic material for ease of manufacture by injection. At least one connection terminal 10 is mounted in the electrical apparatus, depending on the number of electrical conductors 13 to be connected. In the example illustrated, the electrical apparatus comprises two separate connection terminals 10, independent of one another. The two connection terminals 10 allow the electrical connection to the conductive strip 11 of two electrical conductors 13 identical or different. Each of the two connection terminals 10 is intended to receive, in this case, the end of a corresponding electrical conductor 13 (see FIG. figure 1 ).

Le boitier isolant 14 peut être monobloc, ou, comme cela est illustré, constitué par l'assemblage de plusieurs parties : dans l'exemple illustré, le boitier isolant 14 comprend deux parties 14a, 14b assemblées l'une à l'autre de manière démontable suivant une direction de montage globalement perpendiculaire à la direction d'insertion des conducteurs électriques 13 dans les deux bornes de connexion 10. La fixation des deux parties 14a, 14b peut se faire par encliquetage, par l'intermédiaire de vis, ou partout autre moyen équivalent.The insulating housing 14 may be one-piece, or, as illustrated, constituted by the assembly of several parts: in the example shown, the insulating housing 14 comprises two parts 14a, 14b assembled to each other so that dismountable in a direction of assembly generally perpendicular to the direction of insertion of the electrical conductors 13 in the two connection terminals 10. The attachment of the two parts 14a, 14b can be done by snapping, by means of screws, or everywhere else equivalent way.

Le boitier isolant 14 comprend au moins un orifice de réception 15 d'un premier type dans lequel l'extrémité d'un conducteur électrique 13 est enfilée jusqu'à venir s'insérer dans l'élément de serrage 12 et au moins un orifice de réception 16 d'un deuxième type permettant l'insertion d'un autre conducteur électrique (non représenté) dans le boitier isolant 14, différent du ou des conducteur(s) électrique(s) 13. En complément, l'appareil électrique comprend au moins une barrette de dérivation 17 configurée de sorte à relier électriquement la barrette conductrice 11 et le conducteur électrique inséré dans l'orifice de réception 16 du deuxième type.The insulating housing 14 comprises at least one receiving orifice 15 of a first type in which the end of an electrical conductor 13 is threaded until it is inserted into the clamping element 12 and at least one orifice of receiving 16 of a second type allowing the insertion of another electrical conductor (not shown) into the insulating housing 14, different from the electrical conductor (s) 13. In addition, the electrical apparatus comprises at least one branch bar 17 configured to electrically connect the conductive strip 11 and the electrical conductor inserted into the receiving port 16 of the second type.

Plus précisément, dans l'exemple illustré qui est non limitatif, le boitier isolant 14 comprend deux orifices de réception 15 selon le premier type agencés sur des côtés latéraux du boitier isolant 14 opposés. Ces deux orifices de réception 15 selon le premier type permettent de recevoir les deux conducteurs électriques 13 qui viennent se connecter dans les deux bornes de connexion 10 que comprend l'appareil électrique, logées dans le boitier isolant 14.More specifically, in the example shown which is non-limiting, the insulating housing 14 comprises two receiving ports 15 of the first type arranged on opposite sides of the insulating housing 14 opposite. These two receiving orifices 15 according to the first type make it possible to receive the two electrical conductors 13 which come to connect in the two connection terminals 10 which comprises the electrical apparatus, housed in the insulating housing 14.

Chaque orifice de réception 15 du premier type peut comprendre un opercule de protection (non représenté) destiné à obturer l'orifice de réception 15 du premier type qu'il équipe avant la mise en place par insertion du conducteur électrique 13.Each receiving orifice 15 of the first type may comprise a protective cover (not shown) intended to close the receiving orifice 15 of the first type that it equips before insertion by insertion of the electrical conductor 13.

Le boitier isolant 14 comprend également deux orifices de réception 16 selon le deuxième type agencés également sur les mêmes deux côtés latéraux opposés du boitier isolant 14, chacun étant situé juste au-dessus d'un orifice de réception 15 du premier type, ainsi que deux barrettes de dérivation 17 distinctes l'une de l'autre et distincte de la barrette 11. Les deux orfices de réception 16 selon le deuxième type permettent de recevoir deux conducteurs éléctriques non représentés, différents des conducteurs électriques repérés 13, qui viennent en contact avec les barrettes de dérivation 17 pour établir une liaison électrique avec la barrette conductrice 11.The insulating housing 14 also comprises two receiving orifices 16 according to the second type, also arranged on the same two opposite lateral sides of the insulating housing 14, each being located just above a receiving orifice 15 of the first type, as well as two shunt strips 17 distinct from each other and distinct from the bar 11. The two receiving orifices 16 according to the second type can receive two unrepresented electrical conductors, different from the electrical conductors identified 13, which come into contact with the branch strips 17 to establish an electrical connection with the conductive strip 11.

Les bornes de connexion 10 et la barrette conductrice 11 ainsi que les barrettes de dérivation 17 sont concrètement montées dans l'une des deux parties 14a, 14b du boitier isolant 14 avant l'assemblage des deux parties 14a, 14b du boitier isolant 14 entre elles. La figure 2 montre la situation après l'assemblage des deux parties 14a, 14b du boitier isolant 14 entre elles, avant la mise en place des conducteurs électriques 13 visibles sur la figure 1.The connection terminals 10 and the conductive strip 11 as well as the branch strips 17 are concretely mounted in one of the two parts 14a, 14b of the insulating housing 14 before the two parts 14a, 14b of the insulating housing 14 are assembled together. . The figure 2 shows the situation after the assembly of the two parts 14a, 14b of the insulating housing 14 between them, before the introduction of the electrical conductors 13 visible on the figure 1 .

La figure 1 sur laquelle la partie 14b du boitier isolant 14 est absente, montre la situation particulière où l'élément de serrage 12 de la borne de connexion 10 de gauche adopte sa configuration de serrage tandis que l'élément de serrage 12 de la borne de connexion 10 de droite est dans sa configuration de desserrage. Toujours sur la figure 1, les deux conducteurs électriques 13 destinés à être reliés à la barrette conductrice 11 par l'intermédiaire des deux bornes de connexion 10 sont différents l'un de l'autre : le diamètre de l'extrémité du conducteur électrique 13 de droite qui coopère avec l'élément de serrage 12 de la borne de connexion 10 de droite dans sa configuration de desserrage est très largement supérieure au diamètre de l'extrémité du conducteur électrique 13 de gauche qui coopère avec l'élément de serrage 12 de la borne de connexion 10 de gauche dans sa configuration de serrage.The figure 1 on which the portion 14b of the insulating housing 14 is absent, shows the particular situation where the clamping element 12 of the connection terminal 10 on the left adopts its clamping configuration while the clamping element 12 of the connection terminal 10 right is in its loosening configuration. Always on the figure 1 the two electrical conductors 13 intended to be connected to the conductive strip 11 via the two connection terminals 10 are different from each other: the diameter of the end of the right electrical conductor 13 which cooperates with the clamping element 12 of the connection terminal 10 on the right in its loosening configuration is very much greater than the diameter of the end of the electrical conductor 13 of the left which cooperates with the clamping element 12 of the connection terminal 10 of the left in its tightening configuration.

Chaque borne de connexion 10 est configurée de sorte que dans la configuration de serrage de l'élément de serrage 12, l'extrémité du conducteur électrique 13 préalablement insérée dans l'élément de serrage 12 dans sa configuration de desserrage est maintenue en place par serrage entre l'élément de serrage 12 et la barrette conductrice 11 montée dans le boitier isolant 14 afin d'établir un contact électrique entre la barrette conductrice 11 et l'extrémité du conducteur électrique 13.Each connection terminal 10 is configured so that in the clamping configuration of the clamping element 12, the end of the electrical conductor 13 previously inserted into the clamping element 12 in its loosening configuration is held in place by clamping. between the clamping element 12 and the conductive strip 11 mounted in the insulating housing 14 in order to establish an electrical contact between the conductive strip 11 and the end of the electrical conductor 13.

II ressort donc de ce qui précède que les dimensions de la partie intérieure de l'élément de serrage 12 destinée à recevoir l'extrémité des conducteurs électriques 13 et la barrette conductrice 11, ainsi que l'organisation des éléments d'actionnement 18, sont configurés pour admettre la coopération avec des extrémités de conducteurs électriques 13 ayant un diamètre compris dans une plage de valeur prédéterminée.It thus follows from the above that the dimensions of the inner part of the clamping element 12 intended to receive the end of the electrical conductors 13 and the conductive strip 11, as well as the organization of the actuating elements 18, are configured to admit cooperation with ends of electrical conductors 13 having a diameter within a predetermined value range.

Par contre, sur la figure 3 où la partie 14b du boitier isolant 14 est toujours absente, l'élément de serrage 12 de la borne de connexion 10 de gauche adopte sa configuration de desserrage tandis que l'élément de serrage 12 de la borne de connexion 10 de droite est dans sa configuration de serrage.On the other hand, on the figure 3 where the portion 14b of the insulating housing 14 is still absent, the clamping element 12 of the connection terminal 10 on the left adopts its loosening configuration while the clamping element 12 of the connection terminal 10 on the right is in its clamping configuration.

Le placement de l'élément de serrage 12 de chacune des deux bornes de connexion 10 dans l'une ou l'autre de ses configurations se pratique par une manipulation correspondante et adaptée des éléments d'actionnement 18 concernés.The placement of the clamping element 12 of each of the two connection terminals 10 in one or other of its configurations is practiced by a corresponding and adapted manipulation of the actuating elements 18 concerned.

Selon un mode de réalisation particulier non limitatif, le changement d'une configuration à l'autre de l'élément de serrage 12 se pratique par un déplacement d'ensemble de l'élément de serrage 12 par rapport au boitier isolant 14 dans lequel l'élément de serrage 12 est monté à coulissement, entre une première position correspondant à la configuration de desserrage et une deuxième position différente de la première position et correspondant à la configuration de serrage Chaque élément de serrage 12 est logé et monté avec une possibilité de coulissement dans un logement 19 correspondant délimité par le boitier isolant 14. Le mouvement de coulissement peut être rectiligne ou non, suivant la forme et l'organisation du logement 19, qui assure la fonction de guidage de l'élément de serrage 12 durant son déplacement. Dans l'exemple particulier illustré, le boitier isolant 14 délimite donc deux logements 19 dans lesquels sont montés à coulissement les deux éléments de serrage 12 des deux bornes de connexion 10. Pour une borne de connexion 10 donnée, l'orifice de réception 15 du premier type débouche dans le logement 19 correspondant.According to a particular non-limiting embodiment, the change from one configuration to the other of the clamping element 12 is practiced by an overall displacement of the clamping element 12 with respect to the insulating housing 14 in which the clamping element 12 is slidably mounted between a first position corresponding to the loosening configuration and a second position different from the first position and corresponding to the clamping configuration. Each clamping element 12 is housed and mounted with a sliding possibility. in a corresponding housing 19 delimited by the insulating housing 14. The sliding movement may be rectilinear or not, depending on the shape and organization of the housing 19, which provides the guiding function of the clamping element 12 during its movement. In the particular example illustrated, the insulating housing 14 thus delimits two housings 19 in which are slidably mounted the two clamping elements 12 of the two connection terminals 10. For a connection terminal 10 given, the receiving orifice 15 of the first type opens into the corresponding housing 19.

Par exemple sur la figure 1 l'élément de serrage 12 de la borne de connexion 10 de gauche est dans sa deuxième position tandis que l'élément de serrage 12 de la borne de connexion 10 de droite est dans sa première position. Sur la figure 3, les positions sont inversées pour les deux éléments de serrage 12 par rapport aux positions adoptées sur la figure 1.For example on the figure 1 the clamping element 12 of the left connection terminal 10 is in its second position while the clamping element 12 of the right connection terminal 10 is in its first position. On the figure 3 , the positions are reversed for the two clamping elements 12 with respect to the positions adopted on the figure 1 .

II reste toutefois que le changement d'une configuration à l'autre de chaque élément de serrage pourrait se faire par tout autre moyen, comme par exemple par un changement éventuel de la forme de l'élément de serrage 12.It remains however that the change from one configuration to another of each clamping element could be done by any other means, such as for example by a possible change in the shape of the clamping element 12.

Selon un mode de réalisation particulier, les éléments d'actionnement 18 comprennent au moins un élément de vissage tel qu'une vis ou un boulon, actionnable depuis l'extérieur du boitier isolant 14 et assurant la variation de l'élément de serrage 12 entre la première position et la deuxième position et réciproquement lorsque cet élément de vissage est vissé ou dévissé. Les éléments d'actionnement 18 peuvent toutefois être constitués par tout autre moyen équivalent et adapté, notamment en fonction de la manière dont se pratique le changement de l'élément de serrage 12 d'une configuration à l'autre. L'élément de serrage 12 peut comprendre un élément de vissage complémentaire apte à coopérer avec l'élément de vissage des éléments d'actionnement 18. Par exemple dans le cas tel que représenté où l'élément de vissage des éléments d'actionnement 18 est une vis, alors l'élément de vissage complémentaire peut être un orifice taraudé solidaire de l'élément de serrage 12, dans lequel vient s'engager la vis.According to a particular embodiment, the actuating elements 18 comprise at least one screw element such as a screw or a bolt, operable from the outside of the insulating housing 14 and ensuring the variation of the clamping element 12 between the first position and the second position and vice versa when this screw element is screwed or unscrewed. The actuating elements 18 may, however, be constituted by any other equivalent and adapted means, in particular as a function of the manner in which the change of the clamping element 12 takes place from one configuration to another. The clamping element 12 may comprise a complementary screwing element adapted to cooperate with the screwing element of the actuating elements 18. For example in the case as shown where the screwing element of the actuating elements 18 is a screw, then the complementary screwing element may be a threaded orifice secured to the clamping element 12, in which is engaged the screw.

Alternativement ou en substitution, il peut être prévu que le passage d'une configuration à l'autre de l'élément de serrage 12 puisse être réalisé par un organe élastique tel qu'un ressort configuré à cet effet et logé dans le boitier isolant 14.Alternatively or in substitution, it can be provided that the passage from one configuration to another of the clamping element 12 can be achieved by an elastic member such as a spring configured for this purpose and housed in the insulating housing 14 .

L'invention concerne aussi un appareil électrique en tant que tel, configuré pour constituer notamment un bloc de jonction ou un contacteur comme il l'a déjà été indiqué.The invention also relates to an electrical apparatus as such, configured to constitute in particular a terminal block or a contactor as it has already been indicated.

Claims (10)

Borne de connexion (10) pour appareil électrique tel qu'un bloc de jonction ou un contacteur, comprenant un élément de serrage (12) formé dans un matériau amagnétique et se présentant sous la forme d'une cage apte à recevoir l'extrémité d'un conducteur électrique (13) insérée dans l'élément de serrage (12), et des éléments d'actionnement (18) permettant de faire varier l'élément de serrage (12) entre une configuration de desserrage dans laquelle l'extrémité du conducteur électrique (13) peut librement être insérée dans l'élément de serrage (12) ou être retirée hors de l'élément de serrage (12) et une configuration de serrage dans laquelle l'extrémité du conducteur électrique (13) préalablement insérée dans l'élément de serrage (12) est maintenue en place par serrage entre l'élément de serrage (12) et une barrette conductrice (11) de l'appareil électrique afin d'établir un contact électrique entre la barrette conductrice (11) et l'extrémité du conducteur électrique (13), caractérisée en ce que l'élément de serrage (12) est constitué par une pièce unique monobloc.Connection terminal (10) for electrical apparatus such as a terminal block or a contactor, comprising a clamping element (12) formed of a non-magnetic material and being in the form of a cage adapted to receive the end of an electrical conductor (13) inserted in the clamping element (12), and actuating elements (18) for varying the clamping element (12) between a loosening configuration in which the end of the electrical conductor (13) can freely be inserted into the clamping element (12) or removed from the clamping element (12) and a clamping configuration in which the end of the electrical conductor (13) previously inserted in the clamping element (12) is held in place by clamping between the clamping element (12) and a conductive strip (11) of the electrical apparatus in order to make an electrical contact between the conductor bar (11) and the end electrical conductor (13), characterized in that the clamping element (12) consists of a single piece. Borne de connexion (10) selon la revendication 1, caractérisée en ce que le matériau amagnétique est configuré de sorte que l'élément de serrage (12) présente un état de déformation spatiale, sous l'effet de la chaleur résultant du champ magnétique induit par une intensité électrique supérieure à 100A circulant dans le conducteur électrique (13), tel qu'un retrait de l'extrémité du conducteur électrique (13) hors de l'élément de serrage (12) en configuration de serrage est inhibé par l'élément de serrage (12).Connection terminal (10) according to claim 1, characterized in that the non-magnetic material is configured so that the clamping element (12) has a state of spatial deformation, under the effect of the heat resulting from the induced magnetic field by an electrical current exceeding 100A flowing in the electrical conductor (13), such that withdrawal of the end of the electrical conductor (13) from the clamping element (12) in the clamping configuration is inhibited by the clamping element (12). Borne de connexion (10) selon l'une quelconque des revendications 1 ou 2, caractérisée en ce que le matériau amagnétique est un alliage à base de cuivre, de l'aluminium ou un alliage à base d'aluminium.Connection terminal (10) according to any one of claims 1 or 2, characterized in that the non-magnetic material is a copper-based alloy, aluminum or aluminum-based alloy. Borne de connexion (10) selon l'une des revendications 1 à 3, caractérisée en ce que ladite pièce unique monobloc est obtenue par une opération d'extrusion.Terminal connection (10) according to one of claims 1 to 3, characterized in that said single piece piece is obtained by an extrusion operation. Borne de connexion (10) selon l'une quelconque des revendications 1 à 4, caractérisée en ce que l'élément de serrage (12) se présente sous la forme d'une partie de profilé ayant une section à contour fermé.Terminal block (10) according to one of claims 1 to 4, characterized in that the clamping element (12) is in the form of a profile section having a closed contour section. Borne de connexion (10) selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'au moins localement, l'épaisseur de l'élément de serrage (12) est comprise entre 2 et 4 mm.Connection terminal (10) according to any one of claims 1 to 5, characterized in that at least locally, the thickness of the clamping element (12) is between 2 and 4 mm. Appareil électrique tel qu'un bloc de jonction ou un contacteur, comprenant un boitier isolant (14) électriquement et au moins une borne de connexion (10) selon l'une quelconque des revendications 1 à 6 montée dans le boitier isolant (14), la borne de connexion (10) étant configurée de sorte que dans la configuration de serrage de l'élément de serrage (12), l'extrémité du conducteur électrique (13) préalablement insérée dans l'élément de serrage (12) dans sa configuration de desserrage est maintenue en place par serrage entre l'élément de serrage (12) et une barrette conductrice (11) montée dans le boitier isolant (14) afin d'établir un contact électrique entre la barrette conductrice (11) et l'extrémité du conducteur électrique (13).Electrical apparatus such as a terminal block or a contactor, comprising an insulating housing (14) electrically and at least one connection terminal (10) according to any one of claims 1 to 6 mounted in the insulating housing (14), the connection terminal (10) being configured so that in the clamping configuration of the clamping element (12), the end of the electrical conductor (13) previously inserted into the clamping element (12) in its configuration of loosening is held in place by clamping between the clamping element (12) and a conductive bar (11) mounted in the insulating housing (14) in order to establish an electrical contact between the conductive bar (11) and the end of the electrical conductor (13). Appareil électrique selon la revendication 7, caractérisé en ce que le changement d'une configuration à l'autre de l'élément de serrage (12) se pratique par un déplacement d'ensemble de l'élément de serrage (12) par rapport au boitier isolant (14) dans lequel l'élément de serrage (12) est monté à coulissement entre une première position correspondant à la configuration de desserrage et une deuxième position différente de la première position et correspondant à la configuration de serrage.Electrical apparatus according to claim 7, characterized in that the change of configuration of the clamping element (12) to the other is effected by an overall displacement of the clamping element (12) with respect to insulating housing (14) in which the clamping element (12) is slidably mounted between a first position corresponding to the loosening configuration and a second position different from the first position and corresponding to the clamping configuration. Appareil électrique selon la revendication 8, caractérisé en ce que les éléments d'actionnement (18) comprennent au moins un élément de vissage actionnable depuis l'extérieur du boitier isolant (14) et assurant la variation de l'élément de serrage (12) entre la première position et la deuxième position et réciproquement lorsque l'élément de vissage est vissé ou dévissé.Electrical device according to claim 8, characterized in that the actuating elements (18) comprise at least one screw element operable from the outside of the insulating housing (14) and ensuring the variation of the clamping element (12) between the first position and the second position and vice versa when the screw element is screwed or unscrewed. Appareil électrique selon l'une des revendications 7 à 9, caractérisé en ce que le boitier isolant (14) comprend au moins un orifice de réception (15) d'un premier type dans lequel l'extrémité d'un conducteur électrique (13) est enfilée jusque à venir s'insérer dans l'élément de serrage (12) et au moins un orifice de réception (16) d'un deuxième type permettant l'insertion d'un autre conducteur électrique dans le boitier isolant (14), et en ce que l'appareil électrique comprend une barrette de dérivation (17) configurée de sorte à relier électriquement la barrette conductrice (11) et le conducteur électrique inséré dans l'orifice de réception (16) du deuxième type.Electrical device according to one of claims 7 to 9, characterized in that the insulating housing (14) comprises at least one receiving orifice (15) of a first type in which the end of an electrical conductor (13) is inserted into the clamping element (12) and at least one receiving orifice (16) of a second type allowing the insertion of another electrical conductor into the insulating housing (14), and in that the electrical apparatus comprises a branch bar (17) configured to electrically connect the bar conductor (11) and the electrical conductor inserted in the receiving port (16) of the second type.
EP17150057.2A 2016-01-08 2017-01-02 Electrical apparatus with connection terminal provided with a clamping cage made of non-magnetic material Active EP3190664B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1650145A FR3046702B1 (en) 2016-01-08 2016-01-08 CONNECTION TERMINAL FOR AN ELECTRIC APPARATUS EQUIPPED WITH A CLAMP OF A CLAMP OF AMAGNETIC MATERIAL

Publications (2)

Publication Number Publication Date
EP3190664A1 true EP3190664A1 (en) 2017-07-12
EP3190664B1 EP3190664B1 (en) 2020-09-02

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Application Number Title Priority Date Filing Date
EP17150057.2A Active EP3190664B1 (en) 2016-01-08 2017-01-02 Electrical apparatus with connection terminal provided with a clamping cage made of non-magnetic material

Country Status (3)

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EP (1) EP3190664B1 (en)
CN (1) CN107039786B (en)
FR (1) FR3046702B1 (en)

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EP4435986A1 (en) * 2023-03-22 2024-09-25 Erico International Corporation Cable splice system

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CN114243398A (en) * 2021-12-09 2022-03-25 中国华能集团清洁能源技术研究院有限公司 Line connection device

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EP0951096A1 (en) * 1998-04-17 1999-10-20 Schneider Electric Industries SA Connection device and terminal fitted with such a device
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US2938191A (en) * 1958-02-24 1960-05-24 Murray Mfg Corp Electrical pressure connector
EP0687032A1 (en) 1994-06-06 1995-12-13 Schneider Electric Sa Screw connecting terminal for an electrical assembly
EP0848452A1 (en) * 1996-12-16 1998-06-17 Entrelec Sa Connection module comprising connection terminals interconnectable by a conductive movable piece(s)
EP0951096A1 (en) * 1998-04-17 1999-10-20 Schneider Electric Industries SA Connection device and terminal fitted with such a device
FR2786611A1 (en) 1998-11-26 2000-06-02 Jean Jacques Lefebvre CONNECTION TERMINAL FOR THE LOOP SUPPLY OF ELECTRICAL APPLIANCES
DE10056940A1 (en) * 2000-06-20 2002-01-10 Weco Electrical Connectors Inc Electrical terminal strip for surface mounting on PCB, has contact elements inserted into insulating body, each free to move in body relative to side facing circuit board

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4435986A1 (en) * 2023-03-22 2024-09-25 Erico International Corporation Cable splice system

Also Published As

Publication number Publication date
CN107039786B (en) 2021-06-04
EP3190664B1 (en) 2020-09-02
FR3046702B1 (en) 2019-07-26
CN107039786A (en) 2017-08-11
FR3046702A1 (en) 2017-07-14

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