EP0798756A1 - Actuating mechanism for electrical circuit breaker with big opening angle - Google Patents

Actuating mechanism for electrical circuit breaker with big opening angle Download PDF

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Publication number
EP0798756A1
EP0798756A1 EP97410035A EP97410035A EP0798756A1 EP 0798756 A1 EP0798756 A1 EP 0798756A1 EP 97410035 A EP97410035 A EP 97410035A EP 97410035 A EP97410035 A EP 97410035A EP 0798756 A1 EP0798756 A1 EP 0798756A1
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EP
European Patent Office
Prior art keywords
plate
pivot
contact arm
opening
arm
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
EP97410035A
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German (de)
French (fr)
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EP0798756B1 (en
Inventor
Philippe Delcambre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric Industries SAS
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Schneider Electric SE
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Publication date
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0798756A1 publication Critical patent/EP0798756A1/en
Application granted granted Critical
Publication of EP0798756B1 publication Critical patent/EP0798756B1/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/503—Means for increasing the opening stroke of the contacts

Definitions

  • FIG. 1 A mechanism of a circuit breaker of the prior art is illustrated in Figures 1 to 3.
  • the mechanism comprises a lever for supporting the movable contact arm which is articulated on the pivot of the rotary drive plate.
  • the trigger lever is also articulated on the plate, but on an axis offset from the pivot.
  • the connecting rod between the lever and the hook for hooking the plate is not shown for reasons of clarity.
  • the lever and the trigger lever respectively comprise a first transmission means and a second transmission means capable of transmitting position and energy information to the auxiliary modules.
  • the auxiliary modules A can be tripping or signaling modules, which are adaptable to a large lateral face of the circuit breaker housing.
  • FIG. 1 A mechanism of a circuit breaker of the prior art is illustrated in Figures 1 to 3.
  • the first means of transmission of the circuit breaker handle is mechanically connected to the lever of the auxiliary module A by a first control link.
  • the second transmission means is mechanically connected to the auxiliary by a second control link.
  • the first control link is used to transmit a closed or open status signal from the circuit breaker to the auxiliary when the latter consists of a signaling module.
  • the second bidirectional control link serves in one direction to transmit a signal indicating the tripping of the circuit breaker to the auxiliary when the latter is constituted by a fault signaling module, or to transmit in the opposite direction a triggering control signal from the auxiliary module, for example a differential protection block, to the circuit breaker.
  • the object of the invention is to provide a circuit breaker mechanism having improved dielectric strength without modifying the kinematics of the transmission means for adapting the auxiliary modules, and independently of the manual or automatic operating mode.
  • the mechanism according to the invention is characterized in that the pivot axis of the contact arm is integral with the housing and passes through an opening of the plate with a predetermined offset with respect to the pivot, and that the plate has a stop drive respectively separated from the axis of the contact arm by a first spoke, and from the pivot by a second spoke, the difference in length of the spokes allowing an amplified opening angle of the contact arm, which is greater than the stroke angle of the plate.
  • the differential displacement between the contact arm and the plate due to the off-center of the pivot axis of the arm allows to increase the isolation distance without modifying the angular travel of the plate which remains suitable for the fitting of auxiliaries standards.
  • the opening for passage of the axis through the plate has an oblong shape, so as to exert a leverage on the contact arm in the direction of the separation of the contacts.
  • the mechanism 40 is provided with a movable contact arm 12 with a large opening angle ⁇ obtained by off-centering the axis 42 of the contact arm 12 relative to the pivot 14 of the drive plate 16.
  • the double plate 16 is constituted by a pair of elements 16a, 16b each having a pivot 14 engaged in a bearing 44a, 44b of the insulating housing 46.
  • the trigger lever 18 is pivotally mounted on an axis 48 of the plate 16, and cooperates with a triggering member 50 controlled by a pallet 52 of the electromagnetic trigger 54.
  • the second transmission means 24 is arranged on the trigger lever 18, which is intended, when a fault occurs, to interrupt the mechanical connection between the plate 16 and the link 56 coupled to the lever 20.
  • This connection mechanical is effected by means of a hook 58 articulated on an axis 60 of the plate 16.
  • the pivot axis 42 of the movable contact arm 12 passes through an oblong opening 62 of the plate 16, and bears in bearings formed in the opposite faces of the housing 46.
  • the opening 62 of each element 16a, 16b of the plate 16 is offset with respect to the pivot 14, and to the axis 48 of articulation, the pivot 14 being located between the pivot axis 42 of the contact arm 12, and the movable contact 36.
  • a first spring 64 for actuating the plate 16 towards the open position comprises a torsion spring surrounding the pivot 14.
  • One of the end strands of the spring 64 bears on the plate 16, and the strand d the opposite end is in engagement with a fixed abutment of the housing 46.
  • a second spring 66 for the contact pressure is arranged on a projection 68 of the support lever 11 surrounding the pivot axis 42. This spring 66 allows movement relative pivot between the plate 16 and the support lever 11, and urges the latter towards the closed position to ensure a predetermined contact pressure with the fixed contact 34.
  • the plate 16 is equipped with a drive stop 70 intended to come into engagement against a bearing surface 72 of the support lever 11 to move it towards the open position.
  • the radius R1 formed between the axis 42 of the contact arm 12 and the drive stop 70 is less than the radius R2 between the pivot 14 of the plate 16 and the same stop 70.
  • the separation of the contacts 34, 36 takes place following a displacement of the plate 16 towards the open position, which can intervene manually by the intervention of the lever 20, or automatically, following the triggering after the detection of a default.
  • the drive stop 70 approaches the support surface 72 of the support lever 11, and drives the latter counterclockwise to the open position of the contacts 34, 36 (figure 7).
  • the difference in length of the radii R1 and R2 conditions an amplified opening angle ⁇ of the contact arm 12, while the plate 16 performs a standard pivoting movement whose stroke ⁇ corresponds to that of FIG. 3.
  • the effect of amplification of the opening movement of the contact arm 12 makes it possible to obtain a greater isolation distance, while the angle of rotation ⁇ of the plate 16 remains adapted to the kinematics of the transmission means 22, 24 at the level handle 26 and release lever 18.
  • the housing of the axis 42 in the oblong opening 62 of the plate 16 causes a lever effect exerted on the movable contact arm 12, capable of causing the contacts 34, 36 to tear off from a state of welding of the latter at point S.
  • the pivot axis 42 is normally biased by the spring 66 towards the end right of the oblong opening 62. From a state of welding of the contacts 34, 36, the movement of the lever 20 towards the open position causes a slight lifting movement of the contact arm 12, and the movement to the left of the axis 42 in the opening 62, from the initial position 0 to a first position 1.
  • the inclination of the opening 62 makes it possible to obtain, in addition to the leverage, an additional shearing effect at the level of the weld S, following the displacement of the axis 42 of the initial position 0 to a second position 2.
  • This shearing effect also causes the movable contact 36 to slip with the fixed contact 34, allowing the contacts to self-clean.

Abstract

A breakable mechanical link lies between the drive plate (16) and a small rod (56) coupled to a first lever (20) with the means (22) to transmit position or control information. The link is controlled by a release lever, driven by the control mechanism (40). A second means acts on the release lever to transmit energy or control information. The abutment (70) is separated with respect to the axis (42) of the contact arm (12) by a first radius, R1, and from the pivot (14) on which the plate rotates by a second radius, R2. The difference in radii produces an amplified angle of opening of the contact arm which is greater than the angular path of the plate.

Description

L'invention est relative à un mécanisme de commande d'un disjoncteur électrique, à boîtier isolant renfermant une paire de contacts fixe et mobile, ledit contact mobile étant porté par un bras de contact actionné entre la position de fermeture et la position d'ouverture par le mécanisme, lequel comporte :

  • une manette équipée d'un premier moyen de transmission d'une information de position et/ou de commande,
  • une platine d'entraînement d'un levier de support du bras de contact, ladite platine étant montée à rotation sur un pivot pour définir une première course angulaire,
  • une liaison mécanique brisable agencée entre la platine et une biellette accouplée à la manette, ladite liaison étant commandée par un levier de déclenchement piloté par un organe déclencheur pour provoquer en cas de défaut, la rupture de la liaison mécanique entraînant le déclenchement automatique du mécanisme,
  • et un deuxième moyen de transmission agencé sur le levier de déclenchement pour transmettre une information d'énergie et/ou de commande.
The invention relates to a control mechanism for an electric circuit breaker, with an insulating housing containing a pair of fixed and movable contacts, said movable contact being carried by a contact arm actuated between the closed position and the open position. by the mechanism, which includes:
  • a joystick equipped with a first means of transmitting position and / or control information,
  • a plate for driving a lever for supporting the contact arm, said plate being mounted to rotate on a pivot to define a first angular stroke,
  • a breakable mechanical link arranged between the plate and a link coupled to the lever, said link being controlled by a trigger lever controlled by a trigger member to cause, in the event of a fault, the rupture of the mechanical link causing the automatic triggering of the mechanism,
  • and a second transmission means arranged on the trigger lever for transmitting energy and / or control information.

Un mécanisme d'un disjoncteur de l'art antérieur est illustré sur les figures 1 à 3.
Le mécanisme comporte un levier de support du bras de contact mobile lequel est articulé sur le pivot de la platine d'entraînement rotative. Le levier de déclenchement est également articulé sur la platine, mais sur un axe décalé par rapport au pivot. La biellette de liaison entre la manette et le crochet d'accrochage de la platine n'est pas représentée pour des raisons de clarté. La manette et le levier de déclenchement comportent respectivement un premier moyen de transmission et un deuxième moyen de transmission capables de transmettre aux modules auxiliaires des informations de position et d'énergie.
Les modules auxiliaires A peuvent être des modules de déclenchement ou de signalisation, lesquels sont adaptables à une grande face latérale du boîtier du disjoncteur. Sur la figure 2, le premier moyen de transmission de la manette du disjoncteur est relié mécaniquement à la manette du module auxiliaire A par une première liaison de commande. Le deuxième moyen de transmission est connecté mécaniquement à l'auxiliaire par une deuxième liaison de commande. La première liaison de commande sert à transmettre un signal d'état fermé ou ouvert du disjoncteur vers l'auxiliaire lorsque ce dernier est constitué par un module de signalisation. La deuxième liaison de commande bidirectionnelle sert dans un sens à transmettre un signal indicateur de déclenchement du disjoncteur vers l'auxiliaire lorsque ce dernier est constitué par un module de signalisation de défaut, ou à transmettre dans le sens opposé un signal de commande de déclenchement du module auxiliaire, par exemple un bloc de protection différentielle, vers le disjoncteur.A mechanism of a circuit breaker of the prior art is illustrated in Figures 1 to 3.
The mechanism comprises a lever for supporting the movable contact arm which is articulated on the pivot of the rotary drive plate. The trigger lever is also articulated on the plate, but on an axis offset from the pivot. The connecting rod between the lever and the hook for hooking the plate is not shown for reasons of clarity. The lever and the trigger lever respectively comprise a first transmission means and a second transmission means capable of transmitting position and energy information to the auxiliary modules.
The auxiliary modules A can be tripping or signaling modules, which are adaptable to a large lateral face of the circuit breaker housing. In FIG. 2, the first means of transmission of the circuit breaker handle is mechanically connected to the lever of the auxiliary module A by a first control link. The second transmission means is mechanically connected to the auxiliary by a second control link. The first control link is used to transmit a closed or open status signal from the circuit breaker to the auxiliary when the latter consists of a signaling module. The second bidirectional control link serves in one direction to transmit a signal indicating the tripping of the circuit breaker to the auxiliary when the latter is constituted by a fault signaling module, or to transmit in the opposite direction a triggering control signal from the auxiliary module, for example a differential protection block, to the circuit breaker.

Le fonctionnement d'un tel mécanisme est décrit en détail dans le document EP-A-295 158. Lors de la séparation des contacts, une butée de la platine rotative entraîne le levier de support dans le sens inverse des aiguilles d'une montre autour du pivot.
En position ouvert, l'angle d'ouverture du bras de contact mobile correspond sensiblement à la course angulaire de la platine après rattrapage du jeu entre la butée et le levier support.The operation of such a mechanism is described in detail in document EP-A-295 158. During the separation of the contacts, a stop of the rotary plate drives the support lever in an anti-clockwise direction around of the pivot.
In the open position, the opening angle of the movable contact arm corresponds substantially to the angular travel of the plate after the play between the stop and the support lever has been taken up.

Pour conserver l'usage des mêmes modules auxiliaires, il est impératif lors d'une extension d'une gamme de disjoncteurs, de respecter le positionnement et le débattement angulaire des moyens de transmission dans les différents états de fonctionnement, notamment fermé, ouvert, déclenché. En cas de maintien de l'articulation du levier support sur le pivot de la platine, l'angle d'ouverture du contact mobile restera constant. La tenue diélectrique d'un tel disjoncteur étant directement proportionnelle à la distance de séparation des contacts dans l'état ouvert, se trouverait de ce fait insuffisante pour un appareil de gros calibres.To keep the use of the same auxiliary modules, it is imperative when extending a range of circuit breakers, to respect the positioning and the angular movement of the transmission means in the different operating states, in particular closed, open, tripped . If the articulation of the support lever on the pivot of the plate is maintained, the opening angle of the movable contact will remain constant. The dielectric strength of such a circuit breaker being directly proportional to the separation distance of the contacts in the open state, would therefore be insufficient for a large gauge device.

L'objet de l'invention consiste à réaliser un mécanisme de disjoncteur ayant une tenue diélectrique améliorée sans modifier la cinématique des moyens de transmission pour l'adaptation des modules auxiliaires, et indépendamment du mode de fonctionnement manuel ou automatique.The object of the invention is to provide a circuit breaker mechanism having improved dielectric strength without modifying the kinematics of the transmission means for adapting the auxiliary modules, and independently of the manual or automatic operating mode.

Le mécanisme selon l'invention est caractérisé en ce que l'axe de pivotement du bras de contact est solidaire du boîtier et traverse une ouverture de la platine avec un décalage prédéterminé par rapport au pivot, et que la platine est dotée d'une butée d'entraînement séparée respectivement de l'axe du bras de contact par un premier rayon, et du pivot par un deuxième rayon, la différence de longueur des rayons autorisant un angle d'ouverture amplifié du bras de contact, lequel est supérieur à la course angulaire de la platine.The mechanism according to the invention is characterized in that the pivot axis of the contact arm is integral with the housing and passes through an opening of the plate with a predetermined offset with respect to the pivot, and that the plate has a stop drive respectively separated from the axis of the contact arm by a first spoke, and from the pivot by a second spoke, the difference in length of the spokes allowing an amplified opening angle of the contact arm, which is greater than the stroke angle of the plate.

Le déplacement différentiel entre le bras de contact et la platine dû au décentrage de l'axe de pivotement du bras permet d'augmenter la distance d'isolement sans modifier la course angulaire de la platine qui reste adaptée à la mise en place d'auxiliaires standards.The differential displacement between the contact arm and the plate due to the off-center of the pivot axis of the arm allows to increase the isolation distance without modifying the angular travel of the plate which remains suitable for the fitting of auxiliaries standards.

Selon une caractéristique de l'invention, l'ouverture de passage de l'axe à travers la platine présente une forme oblongue, de manière à exercer un effet de levier sur le bras de contact dans le sens de la séparation des contacts.According to a characteristic of the invention, the opening for passage of the axis through the plate has an oblong shape, so as to exert a leverage on the contact arm in the direction of the separation of the contacts.

En inclinant l'ouverture de la platine selon une direction prédéterminée, il est possible d'engendrer un effet de glissement pour l'autonettoyage des contacts.By tilting the opening of the plate in a predetermined direction, it is possible to generate a sliding effect for self-cleaning of the contacts.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation donné à titre d'exemple non limitatif, et représenté aux dessins annexés dans lesquels :

  • la figure 1 est une vue schématique en élévation d'un mécanisme de disjoncteur de l'art antérieur, les contacts étant représentés dans l'état fermé,
  • la figure 2 montre, à l'échelle réduite, l'association du disjoncteur de la figure 1 avec un module auxiliaire, notamment de déclenchement ou de signalisation,
  • la figure 3 est une vue identique de la figure 1, avec les contacts représentés dans l'état ouvert,
  • la figure 4 est une vue en coupe verticale du mécanisme de commande selon l'invention,
  • les figures 5 et 6 montrent respectivement des vues en coupe selon les lignes 5-5 et 6-6 de la figure 4, le mécanisme étant représenté dans l'état fermé des contacts,
  • la figure 7 est une vue identique à la figure 6, le mécanisme étant représenté dans l'état ouvert des contacts,
  • la figure 8 est une vue schématique du mécanisme selon la figure 6, après une tentative d'ouverture manuelle suite à un soudage des contacts,
  • la figure 9 est une vue identique à la figure 8, montrant une variante de réalisation.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment given by way of nonlimiting example, and represented in the appended drawings in which:
  • FIG. 1 is a schematic elevation view of a circuit breaker mechanism of the prior art, the contacts being shown in the closed state,
  • FIG. 2 shows, on a reduced scale, the association of the circuit breaker of FIG. 1 with an auxiliary module, in particular for tripping or signaling,
  • FIG. 3 is an identical view to FIG. 1, with the contacts shown in the open state,
  • FIG. 4 is a view in vertical section of the control mechanism according to the invention,
  • FIGS. 5 and 6 respectively show sectional views along lines 5-5 and 6-6 of FIG. 4, the mechanism being shown in the closed state of the contacts,
  • FIG. 7 is a view identical to FIG. 6, the mechanism being shown in the open state of the contacts,
  • FIG. 8 is a schematic view of the mechanism according to FIG. 6, after an attempt to open manually following welding of the contacts,
  • Figure 9 is a view identical to Figure 8 showing an alternative embodiment.

En référence aux figures 4 à 7, les mêmes numéros de repères seront utilisés pour désigner des pièces identiques à celles du mécanisme des figures 1 à 3. Le mécanisme 40 est doté d'un bras de contact mobile 12 à grand angle d'ouverture β obtenu grâce à un décentrage de l'axe 42 du bras de contact 12 par rapport au pivot 14 de la platine d'entraînement 16.
La platine 16 double est constituée par une paire d'éléments 16a, 16b ayant chacun un pivot 14 engagé dans un palier 44a, 44b du boîtier isolant 46. Le levier de déclenchement 18 est monté à pivotement sur un axe 48 de la platine 16, et coopère avec un organe de déclenchement 50 piloté par une palette 52 du déclencheur électromagnétique 54.With reference to FIGS. 4 to 7, the same reference numbers will be used to designate parts identical to those of the mechanism of FIGS. 1 to 3. The mechanism 40 is provided with a movable contact arm 12 with a large opening angle β obtained by off-centering the axis 42 of the contact arm 12 relative to the pivot 14 of the drive plate 16.
The double plate 16 is constituted by a pair of elements 16a, 16b each having a pivot 14 engaged in a bearing 44a, 44b of the insulating housing 46. The trigger lever 18 is pivotally mounted on an axis 48 of the plate 16, and cooperates with a triggering member 50 controlled by a pallet 52 of the electromagnetic trigger 54.

Le deuxième moyen de transmission 24 est agencé sur le levier de déclenchement 18, lequel est destiné, lors de l'apparition d'un défaut, à interrompre la liaison mécanique entre la platine 16 et la biellette 56 accouplée à la manette 20. Cette liaison mécanique s'effectue par l'intermédiaire d'un crochet d'accrochage 58 articulé sur un axe 60 de la platine 16.The second transmission means 24 is arranged on the trigger lever 18, which is intended, when a fault occurs, to interrupt the mechanical connection between the plate 16 and the link 56 coupled to the lever 20. This connection mechanical is effected by means of a hook 58 articulated on an axis 60 of the plate 16.

L'axe de pivotement 42 du bras de contact 12 mobile traverse une ouverture 62 oblongue de la platine 16, et prend appui dans des paliers ménagés dans les faces opposées du boîtier 46. L'ouverture 62 de chaque élément 16a, 16b de la platine 16 est décalée par rapport au pivot 14, et à l'axe 48 d'articulation, le pivot 14 étant situé entre l'axe de pivotement 42 du bras de contact 12, et le contact mobile 36.The pivot axis 42 of the movable contact arm 12 passes through an oblong opening 62 of the plate 16, and bears in bearings formed in the opposite faces of the housing 46. The opening 62 of each element 16a, 16b of the plate 16 is offset with respect to the pivot 14, and to the axis 48 of articulation, the pivot 14 being located between the pivot axis 42 of the contact arm 12, and the movable contact 36.

Un premier ressort 64 d'actionnement de la platine 16 vers la position d'ouverture, comporte un ressort à torsion entourant le pivot 14. L'un des brins d'extrémité du ressort 64 prend appui sur la platine 16, et le brin d'extrémité opposé se trouve en engagement avec une butée fixe du boîtier 46. Un deuxième ressort 66 pour la pression de contact est agencé sur une saillie 68 du levier de support 11 en entourant l'axe de pivotement 42. Ce ressort 66 autorise un mouvement relatif de pivotement entre la platine 16 et le levier support 11, et sollicite ce dernier vers la position de fermeture pour assurer une pression de contact prédéterminée avec le contact fixe 34.A first spring 64 for actuating the plate 16 towards the open position, comprises a torsion spring surrounding the pivot 14. One of the end strands of the spring 64 bears on the plate 16, and the strand d the opposite end is in engagement with a fixed abutment of the housing 46. A second spring 66 for the contact pressure is arranged on a projection 68 of the support lever 11 surrounding the pivot axis 42. This spring 66 allows movement relative pivot between the plate 16 and the support lever 11, and urges the latter towards the closed position to ensure a predetermined contact pressure with the fixed contact 34.

La platine 16 est équipée d'une butée d'entraînement 70 destinée à venir en engagement contre une surface d'appui 72 du levier support 11 pour le déplacer vers la position d'ouverture. Le rayon R1 ménagé entre l'axe 42 du bras de contat 12 et la butée d'entraînement 70 est inférieur au rayon R2 entre le pivot 14 de la platine 16 et la même butée 70.The plate 16 is equipped with a drive stop 70 intended to come into engagement against a bearing surface 72 of the support lever 11 to move it towards the open position. The radius R1 formed between the axis 42 of the contact arm 12 and the drive stop 70 is less than the radius R2 between the pivot 14 of the plate 16 and the same stop 70.

La séparation des contacts 34, 36 s'opère suite à un déplacement de la platine 16 vers la position d'ouverture, laquelle peut intervenir manuellement par l'intervention de la manette 20, ou automatiquement, suite au déclenchement après la détection d'un défaut. Dans les deux cas, la butée d'entraînement 70 accoste la surface d'appui 72 du levier support 11, et entraîne ce dernier dans le sens inverse des aiguilles d'une montre jusqu'à la position d'ouverture des contacts 34, 36 (figure 7).
La différence de longueur des rayons R1 et R2 conditionne un angle d'ouverture β amplifié du bras de contact 12, pendant que la platine 16 effectue un mouvement de pivotement standard dont la course α correspond à celle de la figure 3. L'effet d'amplification du mouvement d'ouverture du bras de contact 12 permet d'obtenir une distance d'isolement plus grande, alors que l'angle de rotation α de la platine 16 reste adapté à la cinématique des moyens de transmission 22, 24 au niveau de la manette 26 et du levier de déclenchement 18.The separation of the contacts 34, 36 takes place following a displacement of the plate 16 towards the open position, which can intervene manually by the intervention of the lever 20, or automatically, following the triggering after the detection of a default. In both cases, the drive stop 70 approaches the support surface 72 of the support lever 11, and drives the latter counterclockwise to the open position of the contacts 34, 36 (figure 7).
The difference in length of the radii R1 and R2 conditions an amplified opening angle β of the contact arm 12, while the plate 16 performs a standard pivoting movement whose stroke α corresponds to that of FIG. 3. The effect of amplification of the opening movement of the contact arm 12 makes it possible to obtain a greater isolation distance, while the angle of rotation α of the plate 16 remains adapted to the kinematics of the transmission means 22, 24 at the level handle 26 and release lever 18.

En référence à la figure 8, lors d'une tentative d'ouverture par la manette 20, le logement de l'axe 42 dans la lumière 62 oblongue de la platine 16 provoque un effet de levier exercé sur le bras de contact 12 mobile, susceptible de provoquer un arrachement des contacts 34, 36 à partir d'un état de soudage de ces derniers au point S. L'axe 42 de pivotement est normalement sollicité par le ressort 66 vers l'extrémité de droite de l'ouverture 62 oblongue. A partir d'un état de soudage des contacts 34, 36, le déplacement de la manette 20 vers la position d'ouverture provoque un léger mouvement de soulèvement du bras de contact 12, et le déplacement vers la gauche de l'axe 42 dans l'ouverture 62, à partir de la position initiale 0 vers une première position 1.Referring to Figure 8, during an attempt to open by the handle 20, the housing of the axis 42 in the oblong opening 62 of the plate 16 causes a lever effect exerted on the movable contact arm 12, capable of causing the contacts 34, 36 to tear off from a state of welding of the latter at point S. The pivot axis 42 is normally biased by the spring 66 towards the end right of the oblong opening 62. From a state of welding of the contacts 34, 36, the movement of the lever 20 towards the open position causes a slight lifting movement of the contact arm 12, and the movement to the left of the axis 42 in the opening 62, from the initial position 0 to a first position 1.

Selon la variante de la figure 9, l'inclinaison de l'ouverture 62 permet d'obtenir en plus de l'effet de levier, un effet additionnel de cisaillement au niveau de la soudure S, suite au déplacement de l'axe 42 de la position initiale 0 vers une deuxième position 2. Cet effet de cisaillement provoque d'autre part un glissement du contact mobile 36 avec le contact fixe 34, permettant un autonettoyage des contacts.According to the variant of FIG. 9, the inclination of the opening 62 makes it possible to obtain, in addition to the leverage, an additional shearing effect at the level of the weld S, following the displacement of the axis 42 of the initial position 0 to a second position 2. This shearing effect also causes the movable contact 36 to slip with the fixed contact 34, allowing the contacts to self-clean.

Claims (4)

Mécanisme de commande d'un disjoncteur électrique, à boîtier (46) isolant renfermant une paire de contacts fixe (34) et mobile (36), ledit contact mobile étant porté par un bras de contact (12) actionné entre la position de fermeture et la position d'ouverture par le mécanisme (40), lequel comporte : - une manette (20) équipée d'un premier moyen de transmission (22) d'une information de position et/ou de commande, - une platine (16) d'entraînement d'un levier de support (11) du bras de contact (12), ladite platine (16) étant montée à rotation sur un pivot (14) pour définir une première course angulaire α, - une liaison mécanique brisable agencée entre la platine (16) et une biellette (56) accouplée à la manette (20), ladite liaison étant commandée par un levier de déclenchement (18) piloté par un organe déclencheur pour provoquer en cas de défaut, la rupture de la liaison mécanique entraînant le déclenchement automatique du mécanisme (40), - et un deuxième moyen de transmission (24) agencé sur le levier de déclenchement (18) pour transmettre une information d'énergie et/ou de commande, caractérisé en ce que l'axe (42) de pivotement du bras de contact (12) est solidaire du boîtier (46) et traverse une ouverture (62) de la platine (16) avec un décalage prédéterminé par rapport au pivot (14), et que la platine (16) est dotée d'une butée 70 d'entraînement séparée respectivement de l'axe (42) du bras de contact (12) par un premier rayon (R1), et du pivot (14) par un deuxième rayon (R2), la différence de longueur des rayons (R1, R2) autorisant un angle d'ouverture β amplifié du bras de contact (12), lequel est supérieur à la course angulaire α de la platine (16).Control mechanism for an electric circuit breaker, with an insulating housing (46) containing a pair of fixed (34) and movable (36) contacts, said movable contact being carried by a contact arm (12) actuated between the closed position and the position of opening by the mechanism (40), which comprises: - a joystick (20) equipped with a first means of transmission (22) of position and / or control information, a plate (16) for driving a support lever (11) of the contact arm (12), said plate (16) being rotatably mounted on a pivot (14) to define a first angular stroke α, - a breakable mechanical link arranged between the plate (16) and a link (56) coupled to the handle (20), said link being controlled by a trigger lever (18) controlled by a trigger member to cause in the event of a fault, the rupture of the mechanical link causing the automatic triggering of the mechanism (40), - and a second transmission means (24) arranged on the trigger lever (18) for transmitting energy and / or control information, characterized in that the pivot arm (42) of the contact arm (12) is integral with the housing (46) and passes through an opening (62) of the plate (16) with a predetermined offset relative to the pivot (14) , and that the plate (16) is provided with a drive stop 70 separated respectively from the axis (42) of the contact arm (12) by a first radius (R1), and from the pivot (14) by a second radius (R2), the difference in length of the rays (R1, R2) allowing an amplified opening angle β of the contact arm (12), which is greater than the angular travel α of the plate (16). Mécanisme de commande selon la revendication 1, caractérisé en ce que l'ouverture (62) de passage de l'axe (42) à travers la platine (16) présente une forme oblongue, de manière à exercer un effet de levier sur le bras de contact( 12) dans le sens de la séparation des contacts 34, 36.Control mechanism according to claim 1, characterized in that the opening (62) for the passage of the axis (42) through the plate (16) has an oblong shape, so as to exert a leverage on the arm contact (12) in the direction of separation of the contacts 34, 36. Mécanisme de commande selon la revendication 2, caractérisé en ce que l'ouverture (62) dans la platine (16) est inclinée selon une direction prédéterminée, autorisant un effet de cisaillement additionnel adapté à un autonettoyage des contacts.Control mechanism according to claim 2, characterized in that the opening (62) in the plate (16) is inclined in a predetermined direction, allowing an additional shearing effect suitable for self-cleaning of the contacts. Mécanisme de commande selon l'une des revendications 1 à 3, caractérisé en ce que le pivot (14) de la platine (16) est situé entre l'axe (42) de pivotement du bras de contact (12) et le contact mobile (36), et que l'axe 48 d'articulation du levier de déclenchement (18) est disposé sur la platine (16).Control mechanism according to one of claims 1 to 3, characterized in that the pivot (14) of the plate (16) is located between the pivot arm (42) of the contact arm (12) and the movable contact (36), and that the axis 48 of articulation of the trigger lever (18) is disposed on the plate (16).
EP97410035A 1996-03-29 1997-03-19 Actuating mechanism for electrical circuit breaker with big opening angle Expired - Lifetime EP0798756B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9604276A FR2746957B1 (en) 1996-03-29 1996-03-29 CONTROL MECHANISM OF A CIRCUIT BREAKER WITH WIDE OPENING ANGLE
FR9604276 1996-03-29

Publications (2)

Publication Number Publication Date
EP0798756A1 true EP0798756A1 (en) 1997-10-01
EP0798756B1 EP0798756B1 (en) 2005-05-04

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Family Applications (1)

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EP97410035A Expired - Lifetime EP0798756B1 (en) 1996-03-29 1997-03-19 Actuating mechanism for electrical circuit breaker with big opening angle

Country Status (14)

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EP (1) EP0798756B1 (en)
CN (1) CN1083611C (en)
BR (1) BRPI9701509B8 (en)
CZ (1) CZ287559B6 (en)
DE (1) DE69733168T2 (en)
EA (1) EA000520B1 (en)
ES (1) ES2242210T3 (en)
FR (1) FR2746957B1 (en)
HU (1) HU221673B1 (en)
ID (1) ID16415A (en)
MY (1) MY123088A (en)
PL (1) PL184352B1 (en)
TR (1) TR199700248A3 (en)
ZA (1) ZA972539B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1975971A1 (en) * 2007-03-29 2008-10-01 Schneider Electric Industries S.A.S. Device for controlling an electric protection device and electric protection device including same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CZ299994B6 (en) * 2003-10-24 2009-01-14 Jovean & Rogy Electrical Holding Co., Ltd Circuit breaker trigger mechanism
CN102426999B (en) * 2011-09-13 2014-11-19 浙江正泰电器股份有限公司 Operating mechanism of modularized breaker
CN103021748B (en) * 2012-12-28 2015-04-22 常熟开关制造有限公司(原常熟开关厂） Large-fracture circuit breaker
JP2015002012A (en) * 2013-06-13 2015-01-05 パナソニックＩｐマネジメント株式会社 Contact device and circuit breaker
CN104500494B (en) * 2014-11-26 2016-08-24 东华大学 It is applicable to cylinder stroke amplification mechanism and the method for work thereof of small space
US10438754B2 (en) * 2017-11-15 2019-10-08 Carling Technologies, Inc. Low profile circuit breaker with self cleaning contacts
KR102007779B1 (en) * 2018-02-06 2019-08-07 엘에스산전 주식회사 Switchgear having earth switch
RU186711U1 (en) * 2018-11-27 2019-01-30 Общество с ограниченной ответственностью "МФК ТЕХЭНЕРГО" AUTOMATIC SWITCH

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295158A1 (en) * 1987-06-09 1988-12-14 Merlin Gerin Control mechanism for a miniature electric switch
EP0570647A1 (en) * 1992-05-13 1993-11-24 Hager Electro S.A. Switch latch for a circuit breaker and circuit breakers incorporating it

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0295158A1 (en) * 1987-06-09 1988-12-14 Merlin Gerin Control mechanism for a miniature electric switch
EP0570647A1 (en) * 1992-05-13 1993-11-24 Hager Electro S.A. Switch latch for a circuit breaker and circuit breakers incorporating it

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1975971A1 (en) * 2007-03-29 2008-10-01 Schneider Electric Industries S.A.S. Device for controlling an electric protection device and electric protection device including same
FR2914485A1 (en) * 2007-03-29 2008-10-03 Schneider Electric Ind Sas DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION APPARATUS AND ELECTRICAL PROTECTION APPARATUS HAVING THE SAME
AU2008201424B2 (en) * 2007-03-29 2011-11-10 Schneider Electric Industries Sas Operating device of an electrical protection apparatus and electrical protection apparatus comprising same
CN101276710B (en) * 2007-03-29 2012-05-02 施耐德电器工业公司 Device for controlling an electric protection device and electric protection device including same

Also Published As

Publication number Publication date
EA000520B1 (en) 1999-10-28
EA199700029A1 (en) 1997-09-30
TR199700248A2 (en) 1999-09-21
DE69733168D1 (en) 2005-06-09
HUP9700618A2 (en) 1998-01-28
ZA972539B (en) 1997-09-29
ID16415A (en) 1997-09-25
CN1083611C (en) 2002-04-24
CN1164116A (en) 1997-11-05
FR2746957A1 (en) 1997-10-03
DE69733168T2 (en) 2006-01-12
HUP9700618A3 (en) 1999-11-29
PL184352B1 (en) 2002-10-31
BR9701509A (en) 1998-06-30
BR9701509B1 (en) 2009-05-05
BRPI9701509B8 (en) 2016-07-05
HU9700618D0 (en) 1997-05-28
TR199700248A3 (en) 1999-09-21
HU221673B1 (en) 2002-12-28
EP0798756B1 (en) 2005-05-04
CZ287559B6 (en) 2000-12-13
FR2746957B1 (en) 1998-06-19
CZ97097A3 (en) 1998-12-16
MY123088A (en) 2006-05-31
PL319151A1 (en) 1997-10-13
ES2242210T3 (en) 2005-11-01

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