EP0592336B1 - Connecting terminal for electric power equipment - Google Patents
Connecting terminal for electric power equipment Download PDFInfo
- Publication number
- EP0592336B1 EP0592336B1 EP19930420388 EP93420388A EP0592336B1 EP 0592336 B1 EP0592336 B1 EP 0592336B1 EP 19930420388 EP19930420388 EP 19930420388 EP 93420388 A EP93420388 A EP 93420388A EP 0592336 B1 EP0592336 B1 EP 0592336B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- screw
- movable contact
- cable
- contact part
- tunnel
- 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
Links
Images
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
- H01R4/48—Clamped connections, spring connections utilising a spring, clip, or other resilient member
- H01R4/4854—Clamped connections, spring connections utilising a spring, clip, or other resilient member using a wire spring
- H01R4/4863—Coil spring
- H01R4/4872—Coil spring axially compressed to retain wire end
Definitions
- the present invention relates generally to a connection terminal for electrical power equipment, this terminal comprising a cage which forms a closed side wall which surrounds a cage housing and a screw screwed through the side wall of the cage so its internal end is located in the cage housing.
- connection terminals are provided which allow electrical cables to be electrically connected to electrical power equipment.
- a power circuit breaker can have at least two connection terminals intended to be connected respectively to an incoming cable and to a current starting cable.
- a person responsible for the installation of these electrical power apparatuses assembles each electrical apparatus on a fixed support, strips the end of an electric cable, threads this end into a terminal housing and screws a terminal screw up to when locked to establish an efficient mechanical and electrical connection between the electrical cable and the connection terminal.
- the person in charge of such an installation subsequently called the installer, must take care to exert a tightening torque on the screw which is neither too weak nor too strong.
- connection devices which allow an electrical cable to be connected without using a clamping screw
- these devices use a spring leaf which is bent.
- the person To connect a stripped end of an electric cable to this connection device, the person must exert pressure on a part of the leaf spring in order to flex it elastically so that the stripped end of the cable can be introduced between a hook-shaped part formed in the vicinity of the free end of the spring leaf and a fixed part, so that when the person releases his pressure action on the spring leaf, the latter returns elastically causing pinching the stripped end of the cable between the hook of the spring leaf and the fixed part in order to establish a permanent electrical connection between the cable and the connection device.
- connection device determines the restoring force of the spring leaf, and this force is therefore substantially constant and independent of how the person acts on the connection device.
- a known connection device has the drawback that the pinching of the stripped end of the cable takes place between almost point areas of the hook of the resort blade and of the fixed part, and this does not ensure a electric contact sufficiently effective to be able to pass an intense current.
- the electric current flows in a part of the leaf spring and as this leaf spring must generally be made of a steel which has a relatively high resistivity, this further decreases the possibilities of using such a device. connection for dense electric currents.
- connection device has so far been used only for low power electrical equipment, for example for sockets for electric bulbs operating at 220 V with a relatively low power of for example 100 W.
- connection devices have could also be used for other low-voltage and low-power electrical equipment.
- connection device For high power electrical equipment (hereinafter simply called electrical power equipment), for example electrical equipment operating at high voltage or with high currents greater than 1 Ampere, such a connection device could never be used satisfactorily and it was always necessary to use a connection terminal comprising a screw intended to be screwed until it is blocked in order to establish the electrical contact between the cable and the terminal.
- Document DE-A-2 248 430 describes an electrical connector equipped with a pressure element cooperating with a spring to press the stripped end of a conductor against a fixed T-shaped contact surface.
- the pressure element is movable by means of an actuating button, which must be pressed against the force of the spring, to allow the introduction of the stripped end of the cable between the insulating part and a notched part of the surface of
- the pressure element advantageously consists of a piece of insulating material. After releasing the action of pressing the button, the previously compressed spring relaxes, and causes the stripped end of the conductor to pinch against the contact surface.
- Such a device is intended to form a simple terminal block, using a relatively weak spring to be able to be compressed by a relatively moderate driving force.
- Document DE-C-1 212 612 also relates to a terminal block, in which a spring biases a clamping jaw in the direction of a fixed jaw to ensure the jamming of a conductor.
- An object of the present invention is to provide a connection terminal for electrical power equipment for ensuring effective electrical contact between the cable and the terminal capable of passing an intense electric current, the terminal being further designed so that that the installer cannot make a connection in which the cable pinching is too weak or too strong, in other words, that the clamping force is independent of the installer.
- Another object of the invention is to provide such a connection terminal which can be actuated by an installer in a more convenient and reliable manner in order to make a connection or disconnection of an electric cable.
- Another object of the invention consists in proposing such a connection terminal allowing moreover an installer to be able to easily control whether this connection terminal is connected to an electric cable or is not connected to an electric cable.
- Another object of the invention consists in proposing such a connection terminal which can be fixed on an appropriate support of an electrical apparatus without an operation of the terminal being able to cause a deterioration of this support.
- connection terminal for electrical power equipment comprising a cage which forms a closed side wall which surrounds a housing for cage and a screw screwed through the side wall of the cage so that its internal end is located in the cage housing.
- connection terminal further comprises: a movable contact part housed in the cage housing so as to be able to move in the cage housing, this movable contact part forming a cable housing intended to receive an electric cable; a compression spring arranged in a space separating an internal wall of the cage and an external wall of the movable contact piece, this spring being located opposite the screw so as to elastically push the movable contact piece against the internal end of the screw, so that actuation of the screw in one direction causes the moving contact piece to move by compressing the spring and that actuation of the screw in the opposite direction causes movement of the piece movable contact by relaxing the spring; and a fixed contact surface disposed near the electric cable engaged in the movable contact piece, so that the actuation of the screw in the direction which causes the displacement of the movable contact piece by relaxing the spring causes the pinching cable between the movable contact piece; and the fixed contact surface, the gripping force being provided by the elastic force of the spring, and that the actuation of the
- a connection terminal 1 for electrical power equipment (not shown) comprises a cage 2 which forms a closed side wall 3 which surrounds a cage housing 4.
- a screw 5 is screwed through the side wall 3 of the cage 2 so that its internal end 6 is located in the cage housing 4.
- a movable contact piece 7 is housed in the cage housing 4 so as to be able to move laterally in the cage housing 4, this movement taking place in a direction parallel to the longitudinal axis 8 of the screw 5.
- the movable contact piece 7 comprises a hole 9 substantially in its central part, this hole preferably being cylindrical and being oriented so that its longitudinal axis 10 is substantially perpendicular to the longitudinal axis 8 of the screw 5.
- a hole 11 is also formed through the side wall 3 of the cage 2, this hole being able to pass right through the cage 2, as shown in Figure 1 or can simply pass through one side of the side wall 3 (according to a variant not shown).
- the screw 5 is supported at its internal end 6 against a bearing face 12 of the movable contact piece 7.
- the movable contact piece 7 further comprises a lateral face 13 opposite the contact face 12, c that is to say that the side face 13 is located in the part of the movable contact piece 7 which is the farthest from the screw 5.
- a compression spring 14 is housed between the side face 13 of the contact piece mobile 7 and a bearing face 15 located in the cage housing 4 of the cage 2.
- a shallow recess is provided at the side face 13 and another shallow recess is provided at the level of the bearing face 15 so that the compression spring 14 is engaged respectively in one and the other of these two housings in order to be kept lateral.
- the compression spring 14 permanently pushes the movable contact piece 7 against the screw 5. If the screw 5 is completely screwed, the movable contact piece 7 is moved so that its lateral face 13 is brought closer to the face d 'support 15 thereby strongly compressing the compression spring 14. In this position (which is not shown in FIG.
- the hole 9 of the movable contact piece is substantially aligned with the hole 11 of the cage 2 and it is then possible to pass through these two holes a stripped portion 16 of an electric cable 17, a relatively large clearance being provided between the stripped portion 16 and the two holes 9 and 11 so that this stripped portion 16 can be easily put on.
- an installer can unscrew the screw 5 so that it moves towards the outside of the cage 2, this unscrewing producing a displacement of the movable contact piece 7 under the action of the compression spring 14, this displacement according to the displacement of the screw 5 (this displacement of the movable contact part 7 taking place upwards in the drawing of FIG. 1).
- the pinching force corresponds exactly to the compression force of the spring 14.
- FIGS. 2 and 3 show another embodiment of a connection terminal according to the invention.
- This terminal 20 comprises a cage 21 which forms a closed side wall 22 which surrounds a cage housing 23.
- a screw 24 is screwed through the side wall 22 of the cage 21 so that its internal end 25 is located at inside the cage housing 23.
- a contact piece 26 is movably mounted inside the cage housing 23 and this movable contact piece 26 has a recess 27.
- a stripped end 16 of a cable 17 can be inserted into the recess 27 of the movable contact piece 26.
- a fixed pad 28, integral with the cage 21, extends partially in the recess 27 of the movable contact piece 26 of such so that the stripped end 16 of the cable 17 is then located between a bearing face 29 of the recess 27 and a fixed contact surface 30 of the fixed area 28.
- the contact surface 29 is directed towards the screw 24 and the fixed contact surface 30 is directed towards the contact surface t 29.
- a compression spring 31 is disposed between the movable contact piece 26 and an internal bearing surface 32 forming part of the cage housing 23.
- the compression spring 31 permanently pushes the movable contact piece 26 in the direction of the screw 24 and, when the screw 24 is completely screwed into the cage 21, the movable contact piece 26 is moved so as to compress the compression spring 31 and so that the contact surface 29 of the movable contact piece 26 and the fixed contact surface 30 of the fixed pad 28 are relatively spaced from one another so that the stripped end 16 of the cable 17 can be inserted with some play Then, by unscrewing the screw 24 so that it is moved towards the outside of the cage 21, the corresponding displacement of the movable contact piece 26 is caused under the action of the compression spring 31 and this causes the pinching of the stripped end 16 of the cable between the surfaces 29 and 30.
- the part which is fixed relative to the electrical equipment is the fixed track 28 while in the first embodiment shown on In FIG. 1, the fixed part with respect to the electrical equipment is the cage 2.
- This stop means can be constituted for example by a widening of the internal end 6 (or 25) of the screw.
- the screw 5 may advantageously include a display so that the installer can see whether it is screwed on or off.
- This display element can be constituted, for example, by a color mark located in a region of the screw which is visible when the screw is unscrewed, that is to say when the screw is in the position moved outward relative to to the cage and invisible when the screw is screwed, that is to say moved towards the inside of the cage.
Landscapes
- Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
- Switch Cases, Indication, And Locking (AREA)
- Connections Arranged To Contact A Plurality Of Conductors (AREA)
Description
La présente invention concerne de façon générale une borne de raccordement pour un appareillage électrique de puissance, cette borne comprenant une cage qui forme une paroi latérale fermée qui entoure un logement de cage et une vis vissée au travers de la paroi latérale de la cage de façon à ce que son extrémité interne soit située dans le logement de cage.The present invention relates generally to a connection terminal for electrical power equipment, this terminal comprising a cage which forms a closed side wall which surrounds a cage housing and a screw screwed through the side wall of the cage so its internal end is located in the cage housing.
Dans la plupart des appareillages électriques de puissance, sont prévues des bornes de raccordement qui permettent de raccorder électriquement des câbles électriques à l'appareillage électrique de puissance. Par exemple, un disjoncteur de puissance peut compter au minimum deux bornes de raccordement destinées à être connectées respectivement à un câble d'arrivée et à un câble de départ du courant. Habituellement, une personne chargée de l'installation de ces appareillages électriques de puissance monte chaque appareillage électrique sur un support fixe, dénude l'extrémité d'un câble électrique, enfile cette extrémité dans un logement de bornes et visse une vis de borne jusqu'à son blocage afin d'établir une liaison mécanique et électrique efficaces entre le câble électrique et la borne de raccordement. La personne chargée d'une telle installation, appelée par la suite installateur, doit faire attention à exercer un couple de serrage sur la vis qui ne soit ni trop faible ni trop fort. Si le serrage de la vis est trop faible, il y a un risque de déconnexion du câble ou un risque de mauvais contact électrique et si le couple de serrage est trop fort, celui-ci peut détériorer les parties généralement en matière plastique qui supportent la borne de raccordement ou peut provoquer un matage trop important de la partie dénudée du câble, ce matage pouvant aller jusqu'à un affaiblissement de la section du câble susceptible de provoquer sa rupture.In most electrical power equipment, connection terminals are provided which allow electrical cables to be electrically connected to electrical power equipment. For example, a power circuit breaker can have at least two connection terminals intended to be connected respectively to an incoming cable and to a current starting cable. Usually, a person responsible for the installation of these electrical power apparatuses assembles each electrical apparatus on a fixed support, strips the end of an electric cable, threads this end into a terminal housing and screws a terminal screw up to when locked to establish an efficient mechanical and electrical connection between the electrical cable and the connection terminal. The person in charge of such an installation, subsequently called the installer, must take care to exert a tightening torque on the screw which is neither too weak nor too strong. If the tightening of the screw is too weak, there is a risk of cable disconnection or a risk of poor electrical contact and if the tightening torque is too high, this can deteriorate the generally plastic parts which support the terminal of connection or can cause excessive matting of the stripped part of the cable, this matting can go as far as a weakening of the section of the cable which can cause it to break.
Il existe des dispositifs de raccordement qui permettent de raccorder un câble électrique sans utiliser de vis de serrage, ces dispositifs utilisant par contre une lame de ressort qui est recourbée. Pour raccorder une extrémité dénudée d'un câble électrique à ce dispositif de raccordement, la personne doit exercer une pression sur une partie de la lame de ressort afin de la faire fléchir élastiquement de façon à ce que l'extrémité dénudée du câble puisse être introduite entre une partie en forme de crochet ménagée au voisinage de l'extrémité libre de la lame de ressort et une partie fixe, de telle sorte que lorsque la personne relâche son action de pression sur la lame de ressort, celle-ci revient élastiquement en provoquant un pincement de l'extrémité dénudée du câble entre le crochet de la lame de ressort et la partie fixe afin d'établir une connexion électrique permanente entre le câble et le dispositif de raccordement. La force de pincement du câble est déterminée par la force de rappel de la lame de ressort, et cette force est par conséquent sensiblement constante et indépendante de la manière dont la personne agit sur le dispositif de raccordement. Un tel dispositif de raccordement connu présente l'inconvénient que le pincement de l'extrémité dénudée du câble s'effectue entre des zones quasi ponctuelles du crochet de la lame de resort et de la partie fixe, et ceci ne permet pas d'assurer un contact électrique suffisamment efficace pour pouvoir faire passer un courant intense. D'autre part, le courant électrique circule dans une partie de la lame de ressort et comme cette lame de ressort doit être réalisée généralement en un acier qui présente une résistivité relativement élevée, ceci diminue encore les possibilités d'utilisation d'un tel dispositif de raccordement pour des courants électriques denses. C'est pour ces raisons qu'un tel dispositif de raccordement n'a pu être utilisé jusqu'à présent que pour des appareillages électriques de faible puissance, par exemple pour des douilles pour ampoules électriques fonctionnant sous 220 V avec une puissance relativement faible de par exemple 100 W. Ces dispositifs de raccordement ont pu être également utilisés pour d'autres appareillages électriques basse-tension et faible puissance.There are connection devices which allow an electrical cable to be connected without using a clamping screw, these devices, on the other hand, use a spring leaf which is bent. To connect a stripped end of an electric cable to this connection device, the person must exert pressure on a part of the leaf spring in order to flex it elastically so that the stripped end of the cable can be introduced between a hook-shaped part formed in the vicinity of the free end of the spring leaf and a fixed part, so that when the person releases his pressure action on the spring leaf, the latter returns elastically causing pinching the stripped end of the cable between the hook of the spring leaf and the fixed part in order to establish a permanent electrical connection between the cable and the connection device. The cable clamping force is determined by the restoring force of the spring leaf, and this force is therefore substantially constant and independent of how the person acts on the connection device. Such a known connection device has the drawback that the pinching of the stripped end of the cable takes place between almost point areas of the hook of the resort blade and of the fixed part, and this does not ensure a electric contact sufficiently effective to be able to pass an intense current. On the other hand, the electric current flows in a part of the leaf spring and as this leaf spring must generally be made of a steel which has a relatively high resistivity, this further decreases the possibilities of using such a device. connection for dense electric currents. It is for these reasons that such a connection device has so far been used only for low power electrical equipment, for example for sockets for electric bulbs operating at 220 V with a relatively low power of for example 100 W. These connection devices have could also be used for other low-voltage and low-power electrical equipment.
Pour des appareillages électriques de forte puissance (appelés par la suite simplement appareillages électriques de puissance), par exemple des appareillages électriques fonctionnant sous une tension élevée ou avec des courants intenses supérieurs à 1 Ampère, un tel dispositif de raccordement n'a jamais pu être utilisé de façon satisfaisante et il a été toujours nécessaire d'utiliser une borne de raccordement comprenant une vis destinée à être vissée jusqu'à être bloquée afin d'établir le contact électrique entre le câble et la borne.For high power electrical equipment (hereinafter simply called electrical power equipment), for example electrical equipment operating at high voltage or with high currents greater than 1 Ampere, such a connection device could never be used satisfactorily and it was always necessary to use a connection terminal comprising a screw intended to be screwed until it is blocked in order to establish the electrical contact between the cable and the terminal.
Le document DE-A-2 248 430 décrit un connecteur électrique équipé d'un élément de pression coopérant avec un ressort pour presser l'extrémité dénudée d'un conducteur contre une surface de contact fixe en forme de T. L'élément de pression est déplaçable au moyen d'un bouton d'actionnement, lequel doit être enfoncé à l'encontre de la force du ressort, pour permettre l'introduction de l'extrémité dénudée du câble entre la pièce isolante et une partie crantée de la surface de contact .L'élément de pression est constitué avantageusement par une pièce en matière isolante. Après relâchement de l'action de pression sur le bouton, le ressort préablement comprimé se détend, et provoque un pincement de l'extrémité dénudée du conducteur contre la surface de contact. Un tel dispositif est prévu pour former un simple bloc de jonction, utilisant un ressort relativement faible pour pouvoir être comprimé par une force d'enfoncement relativement modérée. Il ne convient pas pour le raccordement d' appareils électriques de forte puissance, étant donné que l'élément de pression en matière isolante risque d'être soumis à des phénomènes de fluage en fonction de la température atteinte par la borne lorsque l'intensité du courant nominal dépasse un certain calibre. La surface de contact, définie par la partie crantée, est insuffisante pour assurer le passage d'un courant de forte intensité.Document DE-A-2 248 430 describes an electrical connector equipped with a pressure element cooperating with a spring to press the stripped end of a conductor against a fixed T-shaped contact surface. The pressure element is movable by means of an actuating button, which must be pressed against the force of the spring, to allow the introduction of the stripped end of the cable between the insulating part and a notched part of the surface of The pressure element advantageously consists of a piece of insulating material. After releasing the action of pressing the button, the previously compressed spring relaxes, and causes the stripped end of the conductor to pinch against the contact surface. Such a device is intended to form a simple terminal block, using a relatively weak spring to be able to be compressed by a relatively moderate driving force. It is not suitable for the connection of high power electrical devices, since the pressure element made of insulating material risk of being subject to creep phenomena as a function of the temperature reached by the terminal when the intensity of the nominal current exceeds a certain rating. The contact surface, defined by the notched part, is insufficient to ensure the passage of a current of high intensity.
Le document DE-C-1 212 612 se rapporte également à un bloc de jonction, dans lequel un ressort sollicite une mâchoire de serrage en direction d'une mâchoire fixe pour assurer le coincement d'un conducteur.Document DE-C-1 212 612 also relates to a terminal block, in which a spring biases a clamping jaw in the direction of a fixed jaw to ensure the jamming of a conductor.
Un objet de la présente invention consiste à proposer une borne de raccordement pour appareillage électrique de puissance permettant d'assurer un contact électrique efficace entre le câble et la borne pouvant faire passer un courant électrique intense, la borne étant en outre conçue de façon à ce que l'installateur ne puisse pas effectuer un raccordement dans lequel le pincement du câble soit trop faible ou trop fort, en d'autres termes, que l'effort de serrage soit indépendant de l'installateur.An object of the present invention is to provide a connection terminal for electrical power equipment for ensuring effective electrical contact between the cable and the terminal capable of passing an intense electric current, the terminal being further designed so that that the installer cannot make a connection in which the cable pinching is too weak or too strong, in other words, that the clamping force is independent of the installer.
Un autre objet de l'invention consiste à proposer une telle borne de raccordement pouvant être actionnée par un installateur d'une façon plus commode et plus fiable afin d'effectuer une connexion ou une déconnexion d'un câble électrique.Another object of the invention is to provide such a connection terminal which can be actuated by an installer in a more convenient and reliable manner in order to make a connection or disconnection of an electric cable.
Un autre objet de l'invention consiste à proposer une telle borne de raccordement permettant en outre à un installateur de pouvoir contrôler aisément si cette borne de raccordement est connectée à un câble électrique ou n'est pas connectée à un câble électrique.Another object of the invention consists in proposing such a connection terminal allowing moreover an installer to be able to easily control whether this connection terminal is connected to an electric cable or is not connected to an electric cable.
Un autre objet de l'invention consiste à proposer une telle borne de raccordement pouvant être fixée sur un support approprié d'un appareillage électrique sans qu'une manoeuvre de la borne ne puisse entraîner une détérioration de ce support.Another object of the invention consists in proposing such a connection terminal which can be fixed on an appropriate support of an electrical apparatus without an operation of the terminal being able to cause a deterioration of this support.
L'invention concerne une borne de raccordement pour appareillage électrique de puissance, comprenant un cage qui forme une paroi latérale fermée qui entoure un logement de cage et une vis vissée au travers de la paroi latérale de la cage de façon à ce que son extrêmité interne soit située dans le logement de cage.The invention relates to a connection terminal for electrical power equipment, comprising a cage which forms a closed side wall which surrounds a housing for cage and a screw screwed through the side wall of the cage so that its internal end is located in the cage housing.
Selon une caractéristique essentielle de l'invention, la borne de raccordement comprend en outre: une pièce de contact mobile logée dans le logement de cage de façon à pouvoir se déplacer dans le logement de cage, cette pièce de contact mobile formant un logement de câble destiné à recevoir un câble électrique ; un ressort de compression disposé dans un espace séparant une paroi interne de la cage et une paroi externe de la pièce de contact mobile, ce ressort étant situé à l'opposé de la vis de façon à pousser élastiquement la pièce de contact mobile contre l'extrémité interne de la vis, de telle sorte que l'actionnement de la vis dans un sens entraîne le déplacement de la pièce de contact mobile en comprimant le ressort et que l'actionnement de la vis dans le sens opposé entraîne le déplacement de la pièce de contact mobile en détendant le ressort ; et une surface de contact fixe disposée à proximité du câble électrique engagé dans la pièce de contact mobile, de telle sorte que l'actionnement de la vis dans le sens qui entraîne le déplacement de la pièce de contact mobile en détendant le ressort provoque le pincement du câble entre la pièce de contact mobile ; et la surface de contact fixe, la force de pincement étant fournie par la force élastique du ressort, et que l'actionnement de la vis dans le sens qui entraîne le déplacement de la pièce de contact mobile en comprimant le ressort provoque la libération du câble entre la pièce de contact mobile et la surface de contact fixe, la surface de contact fixe faisant partie de la cage.According to an essential characteristic of the invention, the connection terminal further comprises: a movable contact part housed in the cage housing so as to be able to move in the cage housing, this movable contact part forming a cable housing intended to receive an electric cable; a compression spring arranged in a space separating an internal wall of the cage and an external wall of the movable contact piece, this spring being located opposite the screw so as to elastically push the movable contact piece against the internal end of the screw, so that actuation of the screw in one direction causes the moving contact piece to move by compressing the spring and that actuation of the screw in the opposite direction causes movement of the piece movable contact by relaxing the spring; and a fixed contact surface disposed near the electric cable engaged in the movable contact piece, so that the actuation of the screw in the direction which causes the displacement of the movable contact piece by relaxing the spring causes the pinching cable between the movable contact piece; and the fixed contact surface, the gripping force being provided by the elastic force of the spring, and that the actuation of the screw in the direction which causes the displacement of the movable contact piece by compressing the spring causes the release of the cable between the movable contact piece and the fixed contact surface, the fixed contact surface forming part of the cage.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif et représenté par les dessins annexés parmi lesquels :
- la figure 1 est une vue en coupe d'une borne de raccordement selon la présente invention ;
- la figure 2 est une vue en coupe d'un autre mode de réalisation d'une borne de raccordement selon l'invention ; et
- la figure 3 est une vue en coupe AA de la figure 2.
- Figure 1 is a sectional view of a terminal connection according to the present invention;
- Figure 2 is a sectional view of another embodiment of a connection terminal according to the invention; and
- FIG. 3 is a sectional view AA of FIG. 2.
Sur la figure 1, une borne de raccordement 1 pour appareillage électrique de puissance (non représenté) comprend une cage 2 qui forme une paroi latérale fermée 3 qui entoure un logement de cage 4. Une vis 5 est vissée au travers de la paroi latérale 3 de la cage 2 de façon à ce que son extrémité interne 6 soit située dans le logement de cage 4. Une pièce de contact mobile 7 est logée dans le logement de cage 4 de façon à pouvoir se déplacer latéralement dans le logement de cage 4, ce déplacement s'effectuant suivant une direction parallèle à l'axe longitudinal 8 de la vis 5. La pièce de contact mobile 7 comprend un trou 9 sensiblement dans sa partie centrale, ce trou étant de préférence cylindrique et étant orienté de telle sorte que son axe longitudinal 10 soit sensiblement perpendiculaire à l'axe longitudinal 8 de la vis 5. Un trou 11 est d'autre part ménagée au travers de la paroi latérale 3 de la cage 2, ce trou pouvant traverser de part en part toute la cage 2, comme cela est représenté sur la figure 1 ou pouvant simplement traverser un côté de la paroi latérale 3 (selon une variante non représentée). La vis 5 s'appuie au niveau de son extrémité interne 6 contre une face d'appui 12 de la pièce de contact mobile 7. La pièce de contact mobile 7 comprend en outre une face latérale 13 opposée à la face de contact 12, c'est-à-dire que la face latérale 13 est située dans la partie de la pièce de contact mobile 7 qui est la plus éloignée de la vis 5. Un ressort de compression 14 est logé entre la face latérale 13 de la pièce de contact mobile 7 et une face d'appui 15 située dans le logement de cage 4 de la cage 2. Un évidement de faible profondeur est ménagé au niveau de la face latérale 13 et un autre évidement de faible profondeur est ménagé au niveau de la face d'appui 15 de telle sorte que le ressort de compression 14 soit engagé respectivement dans l'un et l'autre de ces deux logements afin d'être maintenu latéral. Le ressort de compression 14 pousse en permanence la pièce de contact mobile 7 contre le vis 5. Si la vis 5 est complètement vissée, la pièce de contact mobile 7 est déplacée de façon à ce que sa face latérale 13 soit rapprochée de la face d'appui 15 en comprimant ainsi fortement le ressort de compression 14. Dans cette position (qui n'est pas représentée sur la figure 1), le trou 9 de la pièce de contact mobile est sensiblement aligné avec le trou 11 de la cage 2 et il est alors possible de faire passer au travers de ces deux trous une partie dénudée 16 d'un câble électrique 17, un jeu relativement important étant prévu entre la partie dénudée 16 et les deux trous 9 et 11 de façon à ce que cette partie dénudée 16 puisse être enfilée facilement. Ensuite, un installateur peut dévisser la vis 5 de façon à ce qu'elle se déplace vers l'extérieur de la cage 2, ce dévissage produisant un déplacement de la pièce de contact mobile 7 sous l'action du ressort de compression 14, ce déplacement suivant le déplacement de la vis 5 (ce déplacement de la pièce de contact mobile 7 s'effectuant vers le haut sur le dessin de la figure 1). Il se produit alors un pincement de la partie dénudée 16 du câble entre le trou 9 de la pièce de contact mobile 7 et le trou 11 de la cage 2. La force de pincement correspond exactement à la force de compression du ressort 14. Lorsque la pièce de contact mobile 7 pince ainsi la partie dénudée 16 de câble, elle est immobilisée et si l'installateur continue à dévisser la vis 5, l'extrémité interne 6 de la vis 5 s'écarte de la face d'appui 12 de la pièce de contact mobile 7 et la vis 5 n'agit plus sur la pièce de contact mobile 7. La borne de raccordement est alors dans une condition de connexion du câble électrique 17, cette position de connexion étant celle qui est représentée sur la figure 1. Dans cette position de connexion, la force de pincement de l'extrémité 16 du câble 17 est constante. Par conséquent cette force de pincement est indépendante de l'action qu'un installateur peut faire sur la vis 5. D'autre part, cette force de pincement peut être relativement importante parce qu'elle résulte d'un ressort de compression 14 qui peut être conçu de façon à développer une force relativement élevée. En effet, grâce au système de vis 5, une force relativement élevée du ressort 14 peut être vaincue facilement en actionnant la vis 5 de façon à la visser dans la cage 2 du fait que le système de vissage est capable de développer une force axiale relativement importante à partir d'un couple de vissage relativement faible.In FIG. 1, a
Sur les figures 2 et 3, est représenté un autre mode de réalisation d'une borne de raccordement selon l'invention. Cette borne 20 comporte une cage 21 qui forme une paroi latérale fermée 22 qui entoure un logement de cage 23. Une vis 24 est vissée au travers de la paroi latérale 22 de la cage 21 de façon à ce que son extrémité interne 25 soit située à l'intérieur du logement de cage 23. Une pièce de contact 26 est montée de façon mobile à l'intérieur du logement de cage 23 et cette pièce de contact mobile 26 comporte un évidement 27. Une extrémité dénudée 16 d'un câble 17 peut être insérée dans l'évidement 27 de la pièce de contact mobile 26. D'autre part, une plage fixe 28, solidaire de la cage 21, s'étend en partie dans l'évidement 27 de la pièce de contact mobile 26 de telle sorte que l'extrémité dénudée 16 du câble 17 soit ensuite située entre une face d'appui 29 de l'évidement 27 et une surface de contact fixe 30 de la plage fixe 28. La surface de contact 29 est dirigée vers la vis 24 et la surface de contact fixe 30 est dirigée vers la surface de contact 29. Un ressort de compression 31 est disposé entre la pièce de contact mobile 26 et une surface d'appui interne 32 faisant partie du logement de cage 23. Le ressort de compression 31 pousse en permanence la pièce de contact mobile 26 en direction de la vis 24 et, lorsque la vis 24 est complètement vissée dans la cage 21, la pièce de contact mobile 26 est déplacée de façon à comprimer le ressort de compression 31 et de façon à ce que la surface de contact 29 de la pièce de contact mobile 26 et la surface de contact fixe 30 de la plage fixe 28 soient relativement écartées l'une de l'autre afin de pouvoir introduire avec un certain jeu l'extrémité dénudée 16 du câble 17. Ensuite, en dévissant la vis 24 de façon à ce qu'elle soit déplacée vers l'extérieur de la cage 21, on provoque le déplacement correspondant de la pièce de contact mobile 26 sous l'action du ressort de compression 31 et cela provoque le pincement de l'extrémité dénudée 16 du câble entre les surfaces 29 et 30. Dans ce mode de réalisation, la pièce qui est fixe par rapport à l'appareillage électrique est la plage fixe 28 alors que dans le premier mode de réalisation représenté sur la figure 1, la pièce fixe par rapport à l'appareillage électrique est la cage 2.FIGS. 2 and 3 show another embodiment of a connection terminal according to the invention. This
Afin d'éviter l'inconvénient d'avoir à visser la vis 5 (ou 24) pour désserrer le câble 17 et à dévisser la vis 5 (ou 24) pour serrer et connecter le câble 17 à la borne 1 (ou 20), on peut utiliser une vis 5 (ou 24) à pas à gauche.In order to avoid the inconvenience of having to screw the screw 5 (or 24) to loosen the
Afin que l'installateur ne puisse pas perdre la vis 5 (ou 24) en la dévissant complètement, il peut être prévu sur la vis 5 (ou 24) un moyen d'arrêt pour empêcher que la vis ne soit déplacée vers l'extérieur au-delà d'une certaine limite. Ce moyen d'arrêt peut être constitué par exemple par un élargissement de l'extrémité interne 6 (ou 25) de la vis.So that the installer cannot lose the screw 5 (or 24) by unscrewing it completely, there can be provided on the screw 5 (or 24) a stop means to prevent the screw from being moved outwards beyond a certain limit. This stop means can be constituted for example by a widening of the internal end 6 (or 25) of the screw.
Afin qu'un installateur puisse constater visiblement si une extrémité dénudée 16 d'un câble 17 est serrée ou déserrée à l'intérieur de la borne de raccordement 1 (ou 20), la vis 5 (ou 24) peut comporter avantageusement un élément de visualisation pour que l'installateur puisse constater si elle est vissée ou dévissée. Cet élément de visualisation peut être constitué par exemple par une marque de couleur située dans une région de la vis qui est apparente lorsque la vis est dévissée, c'est-à-dire lorsque la vis est en position déplacée vers l'extérieur par rapport à la cage et invisible lorsque la vis est vissée, c'est-à-dire déplacée vers l'intérieur de la cage.So that an installer can visibly see whether a stripped
Claims (6)
- A connection terminal for an electrical power apparatus, comprising a tunnel (2, 21) which forms a closed side wall (3, 22) which surrounds a tunnel housing (4, 23) and a screw (5, 24) screwed through the side wall of the tunnel in such a way that its internal end (6, 25) is located in the tunnel housing, characterized in that it comprises in addition :a movable contact part (7, 26) housed in the tunnel housing in such a way as to be able to move in the tunnel housing, this movable contact part forming a cable housing (9, 27) designed to receive an electric cable (17) ;a compression spring (14, 31) located in a space separating an internal wall (15, 32) of the tunnel and an external wall (13, 33) of the movable contact part, this spring being situated opposite the screw so as to push the movable contact part (7, 26) elastically against the internal end of the screw (5, 24), in such a way that actuation of the screw in one direction results in movement of the movable contact part compressing the spring and that actuation of the screw in the opposite direction results in movement of the movable contact part relaxing the spring ; anda stationary contact surface (11, 30) located close to the electric cable (17) engaged in the movable contact part (7, 26), in such a way that actuation of the screw in the direction which results in movement of the movable contact part relaxing the spring causes the cable to be pinched between the movable contact part (7, 26) and the stationary contact surface (11, 30), the pinching force being provided by the elastic force of the spring, and that actuation of the screw in the direction which results in movement of the movable contact part compressing the spring causes the cable between the movable contact part (7, 26) and the stationary contact surface (11, 30) to be released, the stationary contact surface (11, 30) forming part of the tunnel (3, 22).
- The connection terminal according to claim 1, characterized in that the stationary contact surface (11, 30) is formed by a hole (11) provided in the tunnel (3) and that the cable is passed with a certain clearance both through the hole (11) of the tunnel (3) and the cable housing (9) of the movable contact part (7).
- The connection terminal according to claim 1, characterized in that the stationary contact surface (30) forms part of a fixed contact strip (28) which extends in part in a cable housing (27) of the movable contact part (26), and is securedly united to the tunnel (22).
- The connection terminal according to any one of the foregoing claims, characterized in that the screw (5, 24) comprises a stop which blocks its rotation when it is moved axially until it reaches a position in which it is not in contact with the movable contact part.
- The connection terminal according to any one of the foregoing claims, characterized in that the screw (5, 24) comprises a visualisation element in order to be able to visually ascertain the tightened or loosened state of the screw.
- The connection terminal according to any one of the foregoing claims, characterized in that the screw (5, 24) is a left-hand thread screw so that it is turned clockwise to bring about pinching of the cable.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9211985A FR2696584B1 (en) | 1992-10-05 | 1992-10-05 | Connection terminal for electrical power equipment. |
FR9211985 | 1992-10-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0592336A1 EP0592336A1 (en) | 1994-04-13 |
EP0592336B1 true EP0592336B1 (en) | 1997-07-16 |
Family
ID=9434302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19930420388 Expired - Lifetime EP0592336B1 (en) | 1992-10-05 | 1993-09-29 | Connecting terminal for electric power equipment |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0592336B1 (en) |
DE (1) | DE69312202T2 (en) |
FR (1) | FR2696584B1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE9503646D0 (en) * | 1995-10-18 | 1995-10-18 | Pacesetter Ab | Device for fixing an end connection of an electrical conductor |
FR2798514B1 (en) * | 1999-09-15 | 2001-11-02 | Schneider Electric Ind Sa | ELASTIC CAGE CONNECTION TERMINAL |
DE19962289A1 (en) * | 1999-12-23 | 2001-06-28 | Abb Patent Gmbh | Connecting terminal for bus bar arrangement in circuit breaker with spring holding frame against clamp |
DE102010032522A1 (en) | 2010-07-28 | 2012-02-02 | Siemens Aktiengesellschaft | Clamping arrangement for a circuit breaker in spring-loaded technology |
FR2997237B1 (en) | 2012-10-23 | 2014-11-21 | Schneider Electric Ind Sas | ELASTIC CAGE FOR CONNECTING TERMINAL AND TERMINAL COMPRISING SUCH A CAGE |
DE202016102669U1 (en) * | 2016-05-19 | 2017-08-22 | Würth Elektronik eiSos Gmbh & Co. KG | Contacting device for electrical energy transmission to a printed circuit board |
GB202006693D0 (en) | 2020-05-06 | 2020-06-17 | Technetix Bv | Connector |
DE102023000390B3 (en) | 2023-02-08 | 2024-02-22 | Sew-Eurodrive Gmbh & Co Kg | Connection device for an electrical conductor and contacting unit |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1212612B (en) * | 1957-02-28 | 1966-03-17 | Josef Eisert | Switchgear terminal blocks |
FR1534779A (en) * | 1967-06-02 | 1968-08-02 | Wago Kontakttechnik Gmbh | Safety wire clamp for electrical conductors |
DE2248189C2 (en) * | 1972-09-30 | 1974-11-14 | Phoenix Elektrizitaetsgesellschaft H. Knuemann & Co, 4933 Blomberg | Electrical connection terminal |
DE3332914C2 (en) * | 1983-09-13 | 1987-02-26 | Square D Starkstrom GmbH, 5277 Marienheide | Connection terminal for low-voltage systems, especially switchgear |
DE3406081A1 (en) * | 1984-02-20 | 1985-08-22 | Siemens AG, 1000 Berlin und 8000 München | Spring-pressure terminal for electrical conductors |
-
1992
- 1992-10-05 FR FR9211985A patent/FR2696584B1/en not_active Expired - Fee Related
-
1993
- 1993-09-29 DE DE1993612202 patent/DE69312202T2/en not_active Expired - Fee Related
- 1993-09-29 EP EP19930420388 patent/EP0592336B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0592336A1 (en) | 1994-04-13 |
FR2696584A1 (en) | 1994-04-08 |
FR2696584B1 (en) | 1994-12-02 |
DE69312202T2 (en) | 1998-01-02 |
DE69312202D1 (en) | 1997-08-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0592336B1 (en) | Connecting terminal for electric power equipment | |
BE1004372A3 (en) | Extraction device of an electric current form. | |
EP2849287A1 (en) | Electric connection device of at least one conductor in a terminal belonging to an electric apparatus | |
CA2373092C (en) | Safety socket | |
EP1531519B1 (en) | Electrical terminal and electrical protection apparatus containing such a terminal | |
EP3487006A1 (en) | Electrical system comprising an electrical apparatus and an interchangeable connector module | |
EP1568109B1 (en) | Electrical contact with elastic return and electrical connection element equipped with at least one such contact | |
EP0280672A1 (en) | Electrical installation apparatus connecting terminal | |
EP0495719A1 (en) | Cigarette lighter, especially for motor vehicles | |
FR2910183A1 (en) | SECURE ELECTRICAL CONTACT | |
FR2882196A1 (en) | Electrical connection lug for electrical appliance, has disk compressing Belleville washer to plate flat attachment against stud when disk is pivoted to cooperate fins with ramp until fins are inserted in notch | |
EP2242158B1 (en) | Fastening claws for electrical appliances | |
FR2758211A1 (en) | DEVICE FOR ELECTRICAL CONNECTIONS | |
EP3190664B1 (en) | Electrical apparatus with connection terminal provided with a clamping cage made of non-magnetic material | |
EP1410468A1 (en) | Device for extracting a male electric plug relative to a female electric plug | |
FR2488452A1 (en) | TERMINAL FOR QUICK ANCHORING OF CONDUCTORS ON "OF" ELECTRICAL DEVICES | |
FR2862441A1 (en) | ENLARGED TIGHTENING ROPE CABLE CLAMP AND JUNCTION BLOCK PROVIDED WITH SUCH A CABLE CLAMP | |
BE544149A (en) | ||
EP0544591B1 (en) | Electrical socket, especially for a motor vehicle | |
EP1672740A1 (en) | Rapid connection terminal for switches and outlet sockets | |
FR2774516A1 (en) | DEVICE FOR LOCKING AND UNLOCKING A CONNECTOR CONNECTED TO A CABLE WITH MULTIPLE CONDUCTORS, RELATIVE TO A BASE | |
FR2621423A1 (en) | Improvements to electrical insulation-displacement contacts | |
FR2829870A1 (en) | Fused circuit isolator, moves from closed position to open position giving access to fuse, with prompt actuation of safety cut-out control | |
EP2461446B1 (en) | Winding device for electric wire | |
FR2643500A1 (en) | EMERGENCY CIRCUIT BREAKER |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES GB IT NL |
|
17P | Request for examination filed |
Effective date: 19940921 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SCHNEIDER ELECTRIC SA |
|
17Q | First examination report despatched |
Effective date: 19951113 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): BE DE ES GB IT NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19970716 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19970716 Ref country code: GB Effective date: 19970716 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19970716 |
|
REF | Corresponds to: |
Ref document number: 69312202 Country of ref document: DE Date of ref document: 19970821 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19970930 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 19970716 |
|
BERE | Be: lapsed |
Owner name: S.A. SCHNEIDER ELECTRIC Effective date: 19970930 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20000912 Year of fee payment: 8 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020501 |