EP0798756B1 - 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
EP0798756B1
EP0798756B1 EP97410035A EP97410035A EP0798756B1 EP 0798756 B1 EP0798756 B1 EP 0798756B1 EP 97410035 A EP97410035 A EP 97410035A EP 97410035 A EP97410035 A EP 97410035A EP 0798756 B1 EP0798756 B1 EP 0798756B1
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EP
European Patent Office
Prior art keywords
plate
contact arm
contacts
spindle
opening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97410035A
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German (de)
French (fr)
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EP0798756A1 (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 Industries SAS
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Filing date
Publication date
Application filed by Schneider Electric Industries SAS filed Critical Schneider Electric Industries SAS
Publication of EP0798756A1 publication Critical patent/EP0798756A1/en
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Publication of EP0798756B1 publication Critical patent/EP0798756B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • a mechanism of a circuit breaker of the prior art is illustrated in Figures 1 to 3.
  • the mechanism comprises a support lever of 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 handle and the attachment hook of the plate is not shown for reasons of clarity.
  • the lever and the trip lever respectively comprise a first transmission means and a second transmission means capable of transmitting position and energy information to the auxiliary modules.
  • Auxiliary modules A may be triggering or signaling modules, which are adaptable to a large side face of the circuit breaker housing.
  • the first transmission means of the handle of the circuit breaker is mechanically connected to the handle of the auxiliary module A by a first control link.
  • the mechanism according to the invention is characterized in that the pivot axis of the arm of contact is secured to the housing and through an opening of the plate with a shift predetermined with respect to the pivot, and that the platen is provided with a drive abutment separated respectively from the axis of the contact arm by a first radius, and from the pivot by a second ray, the difference in length of the rays allowing an opening angle amplified contact arm, which is greater than the angular travel of the platen.
  • the differential displacement between the contact arm and the plate due to the decentering of the axis pivoting of the arm makes it possible to increase the isolation distance without modifying the stroke angle of the plate which remains adapted to the establishment of standard auxiliaries.
  • the mechanism 40 is provided with a movable contact arm 12 with a large opening angle ⁇ obtained by decentering 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 triggering 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 release 54.
  • the plate 16 is equipped with a driving abutment 70 intended to come into engagement against a bearing surface 72 of the support lever 11 to move it to the position opening.
  • the radius R1 formed between the axis 42 of the control arm 12 and the 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 is effected 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 driving abutment 70 abuts the bearing surface 72 of the support lever 11, and drives the latter in the counterclockwise direction to the open position of the contacts 34, 36 ( Figure 7).
  • the difference in length of the radii R1 and R2 conditions an amplified aperture angle ⁇ of the contact arm 12, while the plate 16 performs a standard pivoting movement whose stroke ⁇ corresponds to that of FIG. amplification of the opening movement of the contact arm 12 makes it possible to obtain a greater isolation distance, whereas the angle of rotation ⁇ of the plate 16 remains adapted to the kinematics of the transmission means 22, 24 of the handle 26 and the trip lever 18.
  • the housing of the axis 42 in the oblong slot 62 of the plate 16 causes a lever effect exerted on the movable contact arm 12, capable of causing the contacts 34 to tear out, 36 from a state of welding of these at point S.
  • the axis 42 of pivoting is normally biased by the spring 66 towards the right end of the opening 62 oblong. From a welding state of the contacts 34, 36, the displacement of the handle 20 to the open position causes a slight upward movement of the contact arm 12, and the displacement to the left of the axis 42 in the opening 62, to 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 effect, an additional shearing effect at the weld S, following the displacement of the axis 42 from the initial position 0 to a second position 2.
  • This effect of shearing on the other hand causes a sliding of the movable contact 36 with the contact fixed 34, allowing a self-cleaning of the contacts.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Breakers (AREA)

Description

L'invention est relative à un mécanisme de commande d'un disjoncteur électrique, à boítier 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'entraínement 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 entraínant 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 of an electrical circuit breaker, insulating housing enclosing 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 comprises:
  • a controller equipped with a first means for transmitting position and / or control information,
  • a platen for driving a support lever of the contact arm, said platen being rotatably mounted on a pivot to define a first angular stroke,
  • a breakable mechanical connection arranged between the plate and a rod coupled to the lever, said connection being controlled by a trigger lever controlled by a trigger member to cause in the event of a fault, the breaking 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'entraínement 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 boítier 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 support lever of 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 handle and the attachment hook of the plate is not shown for reasons of clarity. The lever and the trip lever respectively comprise a first transmission means and a second transmission means capable of transmitting position and energy information to the auxiliary modules.
Auxiliary modules A may be triggering or signaling modules, which are adaptable to a large side face of the circuit breaker housing. In Figure 2, the first transmission means of the handle of the circuit breaker is mechanically connected to the handle 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 is constituted by a signaling module. The second bidirectional control link serves in one direction to transmit a trip indicator signal from the circuit breaker to the auxiliary when the latter is constituted by a fault signaling module, or to transmit in the opposite direction a trip control command signal. 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 entraíne 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 the document EP-A-295 158. During the separation of the contacts, a stop of the turntable causes the support lever counterclockwise 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 catching the clearance between the stop and the support lever.

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 preserve the use of the same auxiliary modules, it is imperative during an extension of a range of circuit breakers, to respect the positioning and the angular deflection of transmission means in the different operating states, in particular closed, open, triggered. In case of maintaining the articulation of the support lever on the pivot of the platinum, the opening angle of the moving contact will remain constant. The dielectric strength of a such circuit breaker being directly proportional to the separation distance of the contacts in the open state, would therefore be insufficient for a large caliber apparatus.

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 realize a circuit breaker mechanism having a holding improved dielectric without changing the kinematics of the transmission means for the adaptation of the auxiliary modules, and regardless of the operating mode manual or automatic.

Le mécanisme selon l'invention est caractérisé en ce que l'axe de pivotement du bras de contact est solidaire du boítier 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'entraínement 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 arm of contact is secured to the housing and through an opening of the plate with a shift predetermined with respect to the pivot, and that the platen is provided with a drive abutment separated respectively from the axis of the contact arm by a first radius, and from the pivot by a second ray, the difference in length of the rays allowing an opening angle amplified contact arm, which is greater than the angular travel of the platen.

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 decentering of the axis pivoting of the arm makes it possible to increase the isolation distance without modifying the stroke angle of the plate which remains adapted to the establishment of standard auxiliaries.

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 passage opening of the axis through the plate has an oblong shape, so as to exert a leverage effect on the contact arm in the sense of separating 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 aperture of the platen in a predetermined direction, it is possible to generate a sliding effect for the 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 features will emerge more clearly from the following description of an embodiment given by way of non-limiting example, and represented in the appended drawings in which:
  • FIG. 1 is a diagrammatic elevational 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 of tripping or signaling,
  • FIG. 3 is an identical view of FIG. 1, with the contacts represented in the open state,
  • FIG. 4 is a vertical sectional view of the control mechanism according to the invention,
  • FIGS. 5 and 6 respectively show sectional views along the lines 5-5 and 6-6 of FIG. 4, the mechanism being represented in the closed state of the contacts,
  • FIG. 7 is a view identical to FIG. 6, the mechanism being represented in the open state of the contacts,
  • FIG. 8 is a schematic view of the mechanism according to FIG. 6, after an attempt at manual opening following a 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'entraínement 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 boítier 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 decentering 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 triggering 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 release 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 platen 16 and the rod 56 coupled to the lever 20. This mechanical connection is made by means of a hooking 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 boítier 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 aperture 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 pivot 14, and the hinge axis 48, 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 boítier 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 is supported on the plate 16, and the opposite end strand is in engagement with a fixed stop of the housing 46. A second spring 66 for the contact pressure is arranged on a protrusion 68 of the support lever 11 surrounding the pivot axis 42. This spring 66 allows a relative pivoting movement between the plate 16 and the support lever 11, and urges the latter towards the closed position to ensure a contact pressure predetermined with the fixed contact 34.

La platine 16 est équipée d'une butée d'entraínement 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'entraínement 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 driving abutment 70 intended to come into engagement against a bearing surface 72 of the support lever 11 to move it to the position opening. The radius R1 formed between the axis 42 of the control arm 12 and the 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'entraínement 70 accoste la surface d'appui 72 du levier support 11, et entraíne 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 is effected 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 driving abutment 70 abuts the bearing surface 72 of the support lever 11, and drives the latter in the counterclockwise direction to the open position of the contacts 34, 36 (Figure 7).
The difference in length of the radii R1 and R2 conditions an amplified aperture angle β of the contact arm 12, while the plate 16 performs a standard pivoting movement whose stroke α corresponds to that of FIG. amplification of the opening movement of the contact arm 12 makes it possible to obtain a greater isolation distance, whereas the angle of rotation α of the plate 16 remains adapted to the kinematics of the transmission means 22, 24 of the handle 26 and the trip 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.With reference to FIG. 8, when an attempt is made to open by the handle 20, the housing of the axis 42 in the oblong slot 62 of the plate 16 causes a lever effect exerted on the movable contact arm 12, capable of causing the contacts 34 to tear out, 36 from a state of welding of these at point S. The axis 42 of pivoting is normally biased by the spring 66 towards the right end of the opening 62 oblong. From a welding state of the contacts 34, 36, the displacement of the handle 20 to the open position causes a slight upward movement of the contact arm 12, and the displacement to the left of the axis 42 in the opening 62, to 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 effect, an additional shearing effect at the weld S, following the displacement of the axis 42 from the initial position 0 to a second position 2. This effect of shearing on the other hand causes a sliding of the movable contact 36 with the contact fixed 34, allowing a self-cleaning of the contacts.

Claims (4)

  1. An operating mechanism of an electrical circuit breaker with an insulating case (46) housing a pair of stationary (34) and movable (36) contacts, said movable contact being supported by a contact arm (12) actuated between the closed position and the open position by the mechanism (40), which comprises :
    a handle (20) equipped with a first transmission means (22) for transmitting position and/or operation information,
    a drive plate (16) for driving a support lever (11) of the contact arm (12), said plate (16) being mounted in rotation on a swivel-pin (14) to define a first angular travel (α),
    a breakable mechanical link arranged between the plate (16) and a rod (56) coupled to the handle (20), said link being operated by a trip lever (18) controlled by a trip member to bring about breaking of the mechanical link, in the event of a fault occurring, resulting in automatic tripping of the mechanism (40),
    and a second transmission means (24) arranged on the trip lever (18) to transmit power and/or operation information,
    characterized in that the spindle (42) of the contact arm (12) is securedly affixed to the case (46) and passes through an opening (62) of the plate (16) with a preset offset with respect to the swivel-pin (14), and that the plate (16) is provided with a drive stop (70) respectively separated from the spindle (42) of the contact arm (12) by a first radius (R1), and from the swivel-pin (14) by a second radius (R2), the difference of length of the radii (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).
  2. Operating mechanism according to claim 1, characterized in that the opening (62) for passage of the spindle (42) through the plate (16) presents an oblong shape, so as to exert a leverage effect on the contact arm (12) in the separation direction of the contacts (34, 36).
  3. Operating mechanism according to claim 2, characterized in that the opening (62) in the plate (16) is inclined in to a predetermined direction, allowing an additional shearing effect suitable for self-cleaning of the contacts.
  4. Operating mechanism according to one of the claims 1 to 3, characterized in that the swivel-pin (14) of the plate (16) is situated between the spindle (42) of the contact arm (12) and the movable contact (36), and that the articulation spindle (48) of the trip lever (18) is arranged 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
FR9604276 1996-03-29
FR9604276A FR2746957B1 (en) 1996-03-29 1996-03-29 CONTROL MECHANISM OF A CIRCUIT BREAKER WITH WIDE OPENING ANGLE

Publications (2)

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

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ID=9490935

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) TR199700248A2 (en)
ZA (1) ZA972539B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104500494A (en) * 2014-11-26 2015-04-08 东华大学 Cylinder stroke amplification mechanism suitable for narrow space and working method thereof
CN110120629A (en) * 2018-02-06 2019-08-13 Ls产电株式会社 Switchgear with earthing switch

Families Citing this family (7)

* 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
FR2914485B1 (en) * 2007-03-29 2009-04-24 Schneider Electric Ind Sas DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION APPARATUS AND ELECTRICAL PROTECTION APPARATUS HAVING THE SAME
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
US10438754B2 (en) * 2017-11-15 2019-10-08 Carling Technologies, Inc. Low profile circuit breaker with self cleaning contacts
RU186711U1 (en) * 2018-11-27 2019-01-30 Общество с ограниченной ответственностью "МФК ТЕХЭНЕРГО" AUTOMATIC SWITCH

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2616583B1 (en) * 1987-06-09 1995-01-06 Merlin Gerin CONTROL MECHANISM OF A MINIATURE ELECTRIC CIRCUIT BREAKER
ATE102391T1 (en) * 1992-05-13 1994-03-15 Hager Electro KEYLOCK FOR CIRCUIT BREAKER AND CIRCUIT BREAKER INTEGRATED WITH IT.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104500494A (en) * 2014-11-26 2015-04-08 东华大学 Cylinder stroke amplification mechanism suitable for narrow space and working method thereof
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
CN110120629A (en) * 2018-02-06 2019-08-13 Ls产电株式会社 Switchgear with earthing switch

Also Published As

Publication number Publication date
EA000520B1 (en) 1999-10-28
EP0798756A1 (en) 1997-10-01
ZA972539B (en) 1997-09-29
CN1083611C (en) 2002-04-24
TR199700248A3 (en) 1999-09-21
ES2242210T3 (en) 2005-11-01
MY123088A (en) 2006-05-31
CZ97097A3 (en) 1998-12-16
DE69733168T2 (en) 2006-01-12
BR9701509B1 (en) 2009-05-05
PL319151A1 (en) 1997-10-13
CZ287559B6 (en) 2000-12-13
PL184352B1 (en) 2002-10-31
TR199700248A2 (en) 1999-09-21
BR9701509A (en) 1998-06-30
CN1164116A (en) 1997-11-05
HU221673B1 (en) 2002-12-28
HUP9700618A3 (en) 1999-11-29
HUP9700618A2 (en) 1998-01-28
FR2746957B1 (en) 1998-06-19
FR2746957A1 (en) 1997-10-03
ID16415A (en) 1997-09-25
EA199700029A1 (en) 1997-09-30
DE69733168D1 (en) 2005-06-09
BRPI9701509B8 (en) 2016-07-05
HU9700618D0 (en) 1997-05-28

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