EP0633591B1 - Actuating mechanism for electric modular circuit breaker - Google Patents

Actuating mechanism for electric modular circuit breaker Download PDF

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Publication number
EP0633591B1
EP0633591B1 EP94410027A EP94410027A EP0633591B1 EP 0633591 B1 EP0633591 B1 EP 0633591B1 EP 94410027 A EP94410027 A EP 94410027A EP 94410027 A EP94410027 A EP 94410027A EP 0633591 B1 EP0633591 B1 EP 0633591B1
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EP
European Patent Office
Prior art keywords
locking lever
bar
spindle
bearing surface
handle
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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
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EP94410027A
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German (de)
French (fr)
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EP0633591A1 (en
Inventor
Pierre Batteux
Jean-Luc Payet-Burin
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Schneider Electric SE
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Schneider Electric SE
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Publication of EP0633591A1 publication Critical patent/EP0633591A1/en
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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
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S200/00—Electricity: circuit makers and breakers
    • Y10S200/42—Contact welding considerations

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  • Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

L'invention est relative à un mécanisme de commande d'un disjoncteur électrique multipolaire, comprenant :

  • une paire de platines parallèles entre lesquelles est logé le mécanisme,
  • une genouillère formée par une paire de première et deuxième biellettes articulées entre elles au moyen d'un premier axe de pivotement,
  • un barreau de commutation accouplé mécaniquement à la première biellette, et servant de support aux contacts mobiles de l'ensemble des pôles, ledit barreau étant monté à rotation autour d'un deuxième axe parallèle, pour assurer la fermeture, et l'ouverture des contacts,
  • un crochet de déclenchement monté à pivotement entre une position armée et une position déclenchée autour d'un troisième axe des platines, en étant articulé simultanément à la deuxième biellette,
  • une manette de manoeuvre solidaire d'une embase articulée sur un quatrième axe fixe des platines,
  • un verrou coopérant avec une extrémité du crochet de déclenchement pour former un accrochage mécanique en position armée,
  • un ressort d'embiellage ancré entre le premier axe et l'embase de la manette,
  • et un levier de verrouillage coopérant avec le barreau pour bloquer l'embase dans une position intermédiaire S de la manette lorsque les contacts sont soudés, ledit levier de verrouillage étant monté à pivotement sur un cinquième axe des platines, et comprenant une butée d'arrêt pouvant occuper une première position active ou une deuxième position inactive en fonction de la position angulaire du barreau .
The invention relates to a control mechanism for a multi-pole electric circuit breaker, comprising:
  • a pair of parallel plates between which the mechanism is housed,
  • a toggle formed by a pair of first and second links hinged together by means of a first pivot axis,
  • a switching bar mechanically coupled to the first link, and serving as a support for the movable contacts of all of the poles, said bar being rotatably mounted around a second parallel axis, to ensure the closing and the opening of the contacts ,
  • a trigger hook pivotally mounted between an armed position and a triggered position around a third axis of the plates, while being articulated simultaneously with the second link,
  • an operating lever secured to a base articulated on a fourth fixed axis of the plates,
  • a lock cooperating with one end of the trigger hook to form a mechanical hooking in the armed position,
  • a connecting rod spring anchored between the first axis and the base of the lever,
  • and a locking lever cooperating with the bar to lock the base in an intermediate position S of the lever when the contacts are welded, said locking lever being pivotally mounted on a fifth axis of the plates, and comprising a stopper can occupy a first active position or a second inactive position depending on the angular position of the bar.

Le brevet US-A-3.605.052 décrit un disjoncteur du genre mentionné dans lequel la position de la manette de manoeuvre donne une indication visuelle fiable de la position des organes constitutifs du disjoncteur. L'opérateur peut ainsi détecter un mauvais fonctionnement, notamment le soudage des contacts, et tout réarmement ou déplacement de la manette vers la position d'ouverture est alors rendu impossible par la présence du levier de verrouillage qui bloque la manette dans la position intermédiaire. Le levier de verrouillage est monté à pivotement sur un axe des platines, et est piloté par un palpeur en fonction de la position angulaire du barreau. Ce palpeur est formé par une simple languette reposant sur la face supérieure du barreau. La manette revient automatiquement dans la position fermée sous l'action du ressort d'embiellage du mécanisme.US-A-3,605,052 describes a circuit breaker of the kind mentioned in which the position of the operating handle gives a reliable visual indication of the position of the constituent parts of the circuit breaker. The operator can thus detect a bad operation, including contact welding, and any resetting or moving the lever to the open position is then made impossible by the presence of the locking lever which locks the lever in the intermediate position. The lever locking device is pivotally mounted on an axis of the plates, and is controlled by a probe depending on the angular position of the bar. This probe is formed by a simple tongue resting on the upper face of the bar. The controller returns automatically in the closed position under the action of the connecting rod spring of the mechanism.

Le brevet FR-A-2.262.859 prévoit en plus, un prédéclenchement initial commandé en début de la course de déplacement de la manette, suivi du blocage de la manette par le dispositif de verrouillage.The patent FR-A-2,262,859 also provides for an initial pre-triggering ordered in start of the movement movement of the joystick, followed by blocking of the joystick by the locking device.

Le brevet US-A-5.142.112 décrit un levier de verrouillage en forme de fourchette coopérant avec le barreau de commutation. Toute la surface de la fourchette entoure le barreau lorsque ce dernier se trouve en position fermée des contacts. En cas d'ouverture normale des contacts, le barreau entraíne le levier de verrouillage vers la position de déblocage dès le début de la course d'ouverture. Il en résulte un déblocage anticipé du levier de verrouillage, avant la formation de la distance de sectionnement requise entre les contacts séparés.US-A-5,142,112 describes a fork-shaped locking lever cooperating with the switching bar. The entire surface of the fork surrounds the bar when the latter is in the closed position of the contacts. In case of opening normal contacts, the bar drives the locking lever to the position of release from the start of the opening stroke. This results in an early release of the locking lever, before forming the required cutting distance between separate contacts.

L'objet de l'invention consiste à réaliser un mécanisme de commande pour disjoncteur à sécurité positive, empêchant tout déplacement de la manette vers la position d'ouverture, si la distance de sectionnement entre les contacts n'est pas atteinte.The object of the invention is to provide a control mechanism for a circuit breaker positive safety, preventing any movement of the lever towards the open position, if the isolation distance between the contacts is not reached.

Le mécanisme selon l'invention est caractérisé en ce que le levier de verrouillage comporte une surface d'appui rayonnante coopérant avec une protubérance du barreau pour conserver le maintien du levier de verrouillage dans la première position active de la butée, pendant une première partie de la course d'ouverture du contact mobile de chaque pôle, et une encoche de réception de ladite protubérance provoquant le déblocage du levier de verrouillage pour libérer l'embase au voisinage de la fin de course d'ouverture du contact mobile .The mechanism according to the invention is characterized in that the locking lever has a radiating bearing surface cooperating with a protuberance of the bar to keep the locking lever in the first active position of the stop, during a first part of the opening stroke of the movable contact of each pole, and a notch for receiving said protuberance causing the unlocking the locking lever to release the base near the end of the stroke opening of the mobile contact.

Le blocage temporaire de la butée d'arrêt est conservé durant le mouvement de glissement de l'extrémité de la protubérance le long de la surface d'appui rayonnante du levier de verrouillage jusqu'à ce que la distance de sectionnement entre les contacts soit atteinte. La libération de l'embase intervient ensuite après déblocage du levier de verrouillage au voisinage de la fin de course d'ouverture. The temporary blocking of the stopper is retained during the movement of sliding of the end of the protrusion along the radiating bearing surface of the locking lever until the isolating distance between the contacts is reached. The release of the base then occurs after release of the lever. locking in the vicinity of the opening limit switch.

La surface d'appui du levier de verrouillage peut être conformée selon un arc de cercle, centré sur l'axe du barreau, ou une portion plane s'étendant sensiblement selon une direction tangente à la protubérance lors de la rotation du barreau pendant la première partie de la course d'ouverture.The bearing surface of the locking lever can be shaped in an arc, centered on the axis of the bar, or a flat portion extending substantially in a direction tangent to the protuberance during the rotation of the bar during the first part of the opening race.

L'embase est munie d'une saillie de blocage destinée à venir en engagement dans ladite position intermédiaire S de la manette contre la butée d'arrêt se trouvant dans le première position active.The base is provided with a locking projection intended to come into engagement in said intermediate position S of the lever against the stopper located in the first active position.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre, d'un mode de mise en oeuvre de l'invention donné à titre d'exemple non limitatif, et représenté aux dessins annexés, dans lesquels :Other advantages and characteristics will emerge more clearly from the description which will follow, of an embodiment of the invention given by way of example not limiting, and shown in the accompanying drawings, in which:

La figure 1 est une vue schématique en coupe d'un disjoncteur équipé du mécanisme selon l'invention, le disjoncteur étant représenté en position de fermeture.Figure 1 is a schematic sectional view of a circuit breaker equipped with the mechanism according to the invention, the circuit breaker being shown in the closed position.

La figure 1A montre une vue de détail à échelle agrandie d'une partie du mécanisme de la figure 1.FIG. 1A shows a detail view on an enlarged scale of part of the mechanism of Figure 1.

La figure 2 montre une vue en élévation de l'assemblage du mécanisme de commande au barreau de commutation.Figure 2 shows an elevational view of the assembly of the control mechanism switching bar.

La figure 3 représente une vue en coupe du mécanisme de la figure 1.FIG. 3 represents a sectional view of the mechanism of FIG. 1.

Les figures 4 et 4A sont des vues identiques aux figures 1 et 1A, dans la position fermé-soudé avec blocage de la manette dans le position intermédiaire.Figures 4 and 4A are views identical to Figures 1 and 1A, in the closed-welded position with locking of the handle in the intermediate position.

Les figures 5 et 5A sont des vues identiques aux figures 1 et 1A, en début de course d'ouverture des contacts correspondant à la distance d'isolement.Figures 5 and 5A are views identical to Figures 1 and 1A, at the start of the race opening of the contacts corresponding to the isolation distance.

Les figures 6 et 6A sont des vues identiques aux figures 1 et 1A, en fin de course d'ouverture des contacts après déblocage du levier de verrouillage.Figures 6 and 6A are views identical to Figures 1 and 1A, at the end of the race opening of the contacts after unlocking the locking lever.

Sur les figures, un disjoncteur multipolaire 10 à boítier 12 isolant moulé comporte un module de coupure 14 par pôle, formé par une ampoule 16 monobloc en matière plastique moulée, et ayant une forme de parallélépipède rectangle. L'ampoule 16 comprend un fond 18, une face avant 20 ayant un orifice 22 de passage d'un contact mobile 24, deux grandes faces latérales parallèles 26, 28 et deux petites faces de raccordement 30, 32 parallèles.In the figures, a multipole circuit breaker 10 with molded insulating housing 12 comprises a cut-off module 14 per pole, formed by a one-piece bulb 16 made of molded plastic, and having the shape of a rectangular parallelepiped. The bulb 16 comprises a bottom 18, a front face 20 having an orifice 22 for the passage of a contact mobile 24, two large parallel side faces 26, 28 and two small faces of connection 30, 32 parallel.

A l'intérieur de l'ampoule 16 se trouvent deux contacts fixes 34, 36 reliés respectivement par des conducteurs 35, 37 de liaison à une première plage 38 d'une borne de raccordement 40, appelée borne d'entrée du pôle du disjoncteur, et à une deuxième plage 42 destinée à être connectée par une vis 43 à une troisième plage de contact 44 d'un dispositif de déclenchement.Inside the bulb 16 are two fixed contacts 34, 36 connected respectively by conductors 35, 37 connecting to a first pad 38 of a terminal connection 40, called input terminal of the circuit breaker pole, and to a second range 42 intended to be connected by a screw 43 to a third contact pad 44 of a triggering device.

Le dispositif de déclenchement comporte un module déclencheur 46 magnéto-thermique, équipé à l'opposé de la plage 44, d'une quatrième plage de contact 48 faisant partie de l'autre borne 50 de raccordement du pôle du disjoncteur, appelée borne de sortie. Le module déclencheur 46 est inséré en série dans le pôle avec les contacts 34, 36, 24 du module de coupure 14. Il comporte en outre un bilame 54 parcouru par le courant circulant à travers le pôle et une palette mobile 56.The triggering device comprises a magneto-thermal trigger module 46, equipped opposite the pad 44, with a fourth contact pad 48 forming part of the other terminal 50 for connecting the circuit breaker pole, called the output terminal. The trip module 46 is inserted in series in the pole with contacts 34, 36, 24 of the breaking module 14. It further comprises a bimetallic strip 54 traversed by the current circulating through the pole and a mobile pallet 56.

Dans l'état fermé du disjoncteur, le courant rentre par la borne d'entrée 40 et circule successivement dans la première plage 38, le conducteur 35, le contact fixe 34, le contact mobile 24, l'autre contact fixe 36, le conducteur 37, les plages 42 et 44, le module déclencheur 46, la plage de contact 48 et la borne de sortie 50.In the closed state of the circuit breaker, the current returns through the input terminal 40 and flows successively in the first range 38, the conductor 35, the fixed contact 34, the movable contact 24, the other fixed contact 36, the conductor 37, tracks 42 and 44, the trip module 46, contact pad 48 and output terminal 50.

Le dispositif de déclenchement comprend d'autre part une barre de déclenchement 52 montée à rotation limitée entre une position armée et une position déclenchée en fonction de la position de l'organe d'actionnement du module déclencheur 46, qui est soit le bilame 54 soit la palette 56. La barre rotative 52 est déplacée vers la position déclenchée dès que le courant circulant dans le pôle dépasse un seuil prédéterminé. Elle coopère d'autre part avec un verrou 58 d'accrochage d'un mécanisme 60 de commande à genouillère 62 et à manette 64.The triggering device further comprises a trigger bar 52 climb with limited rotation between an armed position and a triggered position in function of the position of the actuating member of the trigger module 46, which is either the bimetallic strip 54 or the pallet 56. The rotary bar 52 is moved to the triggered position as soon as the current flowing in the pole exceeds a predetermined threshold. She cooperates on the other hand with a latch 58 for attaching a control mechanism 60 to knee pad 62 and lever 64.

Le mécanisme 60 représenté en détail aux figures 2 et 3, est commun à l'ensemble des pôles, seule la manette 64 étant accessible de l'extérieur en traversant une lumière 66 de passage du boítier 12, pour la commande manuelle du disjoncteur 10.The mechanism 60 shown in detail in FIGS. 2 and 3 is common to all of the poles, only the handle 64 being accessible from the outside through a light 66 of passage of the housing 12, for manual control of the circuit breaker 10.

La genouillère 62 du mécanisme 60 comporte une biellette inférieure 68 articulée à une biellette supérieure 70 par un axe de pivotement 72. La biellette inférieure 68 de la genouillère 62 est accouplée à une protubérance 74 d'un barreau de commutation 76 servant de support aux contacts mobiles 24 de tous les pôles. Le barreau de commutation 76 est réalisé en un matériau isolant et s'étend parallèlement à la barre de déclenchement 52 dans la direction transversale des pôles.The knee switch 62 of the mechanism 60 comprises a lower link 68 articulated to a upper link 70 by a pivot axis 72. The lower link 68 of the knee switch 62 is coupled to a protuberance 74 of a switching rod 76 serving as a support for the movable contacts 24 of all the poles. The switching bar 76 is made of an insulating material and extends parallel to the trigger bar 52 in the transverse direction of the poles.

Le mécanisme 60 est logé entre deux platines support 78, 80 parallèles et métalliques, et comporte un crochet de déclenchement 82 monté à pivotement sur un axe 83 des platines 78, 80. L'extrémité libre 84 du crochet 82 se trouve en prise en position armée avec le verrou 58 pour former un accrochage. La biellette supérieure 70 de la genouillère 62 est articulée sur un axe 86 du crochet de déclenchement 82, et un ressort 88 d'embiellage est ancré entre l'axe 72 de pivotement de la genouillère 62, et un axe 90 solidaire de l'embase 92 de la manette 64. L'embase 92 est conformée selon un étrier articulé sur un axe 94 des platines 78, 80 pour assurer le déplacement de la manette 64 entre les deux positions F de fermeture et O d'ouverture.The mechanism 60 is housed between two parallel and metallic support plates 78, 80, and comprises a trigger hook 82 pivotally mounted on an axis 83 of the plates 78, 80. The free end 84 of the hook 82 is engaged in the armed position with the latch 58 to form an attachment. The upper link 70 of the kneepad 62 is articulated on an axis 86 of the trigger hook 82, and a spring 88 connecting rod is anchored between the pivot axis 72 of the toggle joint 62, and an axis 90 integral with the base 92 of the lever 64. The base 92 is shaped according to a stirrup articulated on an axis 94 of the plates 78, 80 to ensure the movement of the lever 64 between the two closing positions F and opening O.

Une action de déverrouillage de la barre de déclenchement 52 sur le verrou 58 libère l'accrochage, et le mécanisme 60 se désarme sous l'action de détente d'un ressort d'embiellage 88, entraínant le déplacement par pivotement de la genouillère 62 et la rotation du barreau 76 vers la position d'ouverture des contacts 34, 36, 24 de tous les pôles. L'ordre de déverrouillage du verrou 58 peut provenir du module déclencheur magnéto-thermique 46, ou d'un déclencheur auxiliaire, notamment à manque de tension MN, à émission de courant MX, différentiel, etc...An unlocking action of the trigger bar 52 on the latch 58 releases latching, and the mechanism 60 disarms under the detent action of a spring crankshaft 88, causing the pivoting movement of the toggle joint 62 and the rotation of the bar 76 towards the open position of the contacts 34, 36, 24 of all the poles. The lock 58 unlocking order can come from the trigger module magneto-thermal 46, or an auxiliary trip device, in particular with a lack of voltage MN, with MX current emission, differential, etc ...

Selon l'invention, le mécanisme 60 est équipé en plus d'un levier de verrouillage 96 destiné à empêcher le déplacement de la manette 64 vers la position O d'ouverture lorsque les contacts 24, 34, 36 se trouvent soit dans un état soudé (fig. 4), soit dans un état de sectionnement (figure 5). Le levier de verrouillage 96 est monté à pivotement sur un axe 98 horizontal des platines 78, 80, et comporte à son extrémité opposée une fourchette 100 coopérant avec la protubérance 74 du barreau de commutation 76. Une butée 102 d'arrêt est ménagée sur le flanc supérieur au levier 100, entre la fourchette 100 et l'axe 98, ladite butée 102 d'arrêt pouvant occuper une position active ou une position inactive en fonction de la position angulaire du levier de verrouillage 96 tributaire de celle du barreau 76.According to the invention, the mechanism 60 is equipped in addition with a locking lever 96 intended to prevent movement of the lever 64 towards the open position O when the contacts 24, 34, 36 are either in a soldered state (fig. 4), or in a sectioning state (Figure 5). The locking lever 96 is pivotally mounted on a horizontal axis 98 of the plates 78, 80, and has at its opposite end a fork 100 cooperating with the protuberance 74 of the switching rod 76. A stop 102 is formed on the upper side of the lever 100, between the fork 100 and the axis 98, said stop stop 102 being able to occupy an active position or a inactive position depending on the angular position of the locking lever 96 dependent on that of the bar 76.

La surface interne de l'embase 92 de la manette 64 est pourvue d'une saillie 104 de blocage destinée à venir en engagement contre la butée d'arrêt 102 lorsque cette dernière se trouve dans la position active.The internal surface of the base 92 of the handle 64 is provided with a projection 104 of blocking intended to come into engagement against the stopper 102 when the latter is in the active position.

En référence à la figure 1A, le fourchette 100 du levier de verrouillage 96 présente une encoche 105 semi-ouverte en forme de U renversé, délimitée à gauche par une surface d'appui 106 rayonnante, et à droite par une dent 108. L'encoche 105 est agencée pour épouser la forme de l'extrémité 110 arrondie de la protubérance 74 du barreau 76, de manière à autoriser l'insertion de l'extrémité 110 dans l'encoche 105 lorsque le barreau 76 se trouve au voisinage de la position d'ouverture des contacts. La surface d'appui 106 est légèrement incurvée selon un arc de cercle centré sur l'axe 112 du barreau 76. Le rayon R (figure 5A) de cette surface d'appui 106 est nettement supérieur au rayon du fond de l'encoche 105.Referring to Figure 1A, the fork 100 of the locking lever 96 has a semi-open notch 105 in the shape of an inverted U, delimited on the left by a surface support 106 radiating, and to the right by a tooth 108. The notch 105 is arranged for conform to the shape of the rounded end 110 of the protuberance 74 of the bar 76, of so as to allow the insertion of the end 110 into the notch 105 when the bar 76 is in the vicinity of the open position of the contacts. The support surface 106 is slightly curved in an arc centered on the axis 112 of the bar 76. The radius R (FIG. 5A) of this bearing surface 106 is clearly greater than the radius of the bottom of the notch 105.

Au lieu d'être incurvée, la surface d'appui 106 pourrait également être plane, en étant sensiblement tangente à l'extrémité 110 arrondie de la protubérance 74, lorsque cette dernière est dégagée de l'encoche 105.Instead of being curved, the bearing surface 106 could also be flat, being substantially tangent to the rounded end 110 of the protuberance 74, when this the latter is released from the notch 105.

L'axe 98 fixe de pivotement du levier de verrouillage 96 est situé sur les platines 78, 80 entre le ressort 88 et la surface interne de l'embase 92 de la manette 64.The fixed pivot axis 98 of the locking lever 96 is located on the plates 78, 80 between the spring 88 and the internal surface of the base 92 of the lever 64.

Le mécanisme 60 selon l'invention fonctionne de la manière suivante:The mechanism 60 according to the invention operates as follows:

Dans l'état armé-fermé du disjoncteur 10, représenté à la figure 1, la manette 64 se trouve dans la position F de fermeture, et les contacts 34, 36, 24 sont fermés.In the armed-closed state of the circuit breaker 10, represented in FIG. 1, the handle 64 is is in the closed position F, and the contacts 34, 36, 24 are closed.

La surface d'appui 106 repose sur l'extrémité 110 de la protubérance 74 du barreau 76, lequel sollicite le levier de verrouillage 96 en position relevée, de sorte que la butée 102 se trouve dans la position active en engagement contre la paroi interne de l'embase 72 de la manette 64, mais néanmoins séparée de la saillie 104 par une distance angulaire prédéterminée.The bearing surface 106 rests on the end 110 of the protuberance 74 of the bar 76, which biases the locking lever 96 in the raised position, so that the stop 102 is in the active position in engagement against the internal wall of the base 72 of the handle 64, but nevertheless separated from the projection 104 by an angular distance predetermined.

L'ouverture manuelle des contacts 34, 36, 24 du disjoncteur 10 est provoquée par un pivotement vers la droite de la manette 64. Malgré la position relevée du levier de verrouillage 96, imposée par le barreau 76, la présence de la distance de séparation entre la saillie 104 et la butée 102, autorise le déplacement à pivotement de la manette 64 vers la position O d'ouverture. Le nez de la butée 102 glisse le long de la paroi interne de l'embase 92 durant cette course de la manette 64.The manual opening of the contacts 34, 36, 24 of the circuit breaker 10 is caused by a pivot to the right of lever 64. Despite the raised position of the lever locking 96, imposed by the bar 76, the presence of the separation distance between the projection 104 and the stop 102, authorizes the pivoting movement of the lever 64 towards the O opening position. The nose of the stop 102 slides along the internal wall of the base 92 during this stroke of the lever 64.

Après le dépassement par la manette 64 de la position PMO du point mort d'ouverture, la genouillère 62 entraíne le barreau de commutation 76 en rotation dans le sens des aiguilles d'une montre. Il s'agit d'un fonctionnement normal du disjoncteur 10, dans lequel les contacts se séparent jusqu'à atteindre la position de fin de course d'ouverture (figure 6). Suite à cette rotation du barreau 76, l'extrémité 110 de la protubérance 74 n'est plus en contact avec la surface d'appui 106, mais est engagée à l'intérieur de l'encoche 105 (figure 6A). Le levier de verrouillage 96 pivote autour de son axe 98 dans le sens inverse des aiguilles d'une montre, pour se trouver dans une position abaissée de déblocage, ce qui positionne la butée 102 dans une position inactive de manière à échapper à la saillie 104. La manette 64 peut être amenée dans la position O d'ouverture, avec possibilité de cadenassage dans cette position.After the lever 64 exceeds the PMO position of the opening dead center, the toggle joint 62 drives the switching rod 76 in rotation in the direction of Clockwise. This is normal operation of circuit breaker 10, in which the contacts separate until reaching the opening limit switch position (figure 6). Following this rotation of the bar 76, the end 110 of the protuberance 74 is no longer in contact with the bearing surface 106, but is engaged inside of the notch 105 (FIG. 6A). The locking lever 96 pivots about its axis 98 in counterclockwise, to be in a lowered position by release, which positions the stop 102 in an inactive position so as to escape the projection 104. The handle 64 can be brought into the open position O, with possibility of padlocking in this position.

On remarque sur les figures 5 et 5A que le levier de verrouillage 96 reste maintenu dans la position relevée de blocage au début de la course d'ouverture du contact mobile 24. Le bord de droite de la surface d'appui 106 est toujours en engagement avec l'extrémité 110, ce qui permet de conserver le blocage du levier de verrouillage 96 pendant une première partie de la course d'ouverture. La distance entre les contacts séparés correspond à la distance d'isolement garantissant le sectionnement. La manette 64 se trouve dans une position intermédiaire S située entre la position PMO du point mort d'ouverture, et la position O d'ouverture, et la saillie 104 est arrêtée par la butée 102 de manière à bloquer temporairement la manette dans la position intermédiaire S. Le déblocage du levier de verrouillage 96 intervient automatiquement lorsque le contact mobile 24 est quasi ouvert, ce qui libère l'accrochage entre la saillie 104 et la butée 102 permettant à la manette 64 d'être amenée vers la position O d'ouverture.Note in Figures 5 and 5A that the locking lever 96 remains held in the raised blocking position at the start of the opening stroke of the movable contact 24. The right edge of the support surface 106 is always in engagement with the end 110, which makes it possible to keep the locking lever 96 locked during a first part of the opening race. The distance between the separate contacts corresponds to the isolation distance guaranteeing the isolation. The controller 64 is found in an intermediate position S located between the PMO position in neutral opening, and the O opening position, and the projection 104 is stopped by the stop 102 of so as to temporarily lock the lever in the intermediate position S. The the locking lever 96 is released automatically when the ignition mobile 24 is almost open, which frees the coupling between the projection 104 and the stop 102 allowing the handle 64 to be brought to the open position O.

Les figures 4 et 4A représentent le cas d'un fonctionnement anormal correspondant à un état de soudure des contacts 34, 36, 24. Le contact mobile 24 se trouve en position fermée, et le barreau 76 reste immobile dans la même position que celle de la figure 1. La surface d'appui 106 coopère avec l'extrémité 110, ce qui exclut tout déblocage du levier de verrouillage 96. La manette 64 est bloquée positivement dans la position intermédiaire S par l'action d'accrochage de la saillie 104 contre la butée 102, ce qui empêche toute tentative de déplacement forcé de la manette 64 vers la position O en interdisant le cadenassage.FIGS. 4 and 4A represent the case of abnormal operation corresponding to a solder state of contacts 34, 36, 24. The movable contact 24 is in position closed, and the bar 76 remains stationary in the same position as that of FIG. 1. The bearing surface 106 cooperates with the end 110, which excludes any unlocking of the locking lever 96. The lever 64 is positively locked in the position intermediate S by the hooking action of the projection 104 against the stop 102, which prevents any attempt to forcefully move handle 64 to position O while prohibiting lockout.

L'engagement de la surface d'appui 106 rayonnante sur l'extrémité 110 du barreau 76 permet de maintenir le levier de verrouillage 96 en position relevée fixe jusqu'à ce que la manette 64 dépasse la position intermédiaire S après une séparation normale des contacts. Le blocage temporaire de la butée 102 d'arrêt est conservé durant tout le mouvement de glissement de l'extrémité 110 le long de la surface d'appui 106 rayonnante pendant la rotation du barreau 76 autour de l'axe 112. La libération de la butée 102 s'effectue en fin de course d'ouverture, lors de l'introduction de l'extrémité 110 dans l'encoche 105 faisant pivoter le levier de verrouillage 96 vers la position abaissée.The engagement of the radiating bearing surface 106 on the end 110 of the bar 76 keeps the locking lever 96 in the fixed raised position until the lever 64 exceeds the intermediate position S after normal separation of the contacts. The temporary blocking of the stop stop 102 is retained throughout the movement of sliding of the end 110 along the radiant support surface 106 during the rotation of the bar 76 around the axis 112. The release of the stop 102 takes place at the end opening stroke, when the end 110 is inserted into the notch 105 pivoting the locking lever 96 to the lowered position.

Claims (7)

  1. An operating mechanism of a multipole electrical circuit breaker, comprising :
    a pair of support plates (78, 80) parallel to one another between which the mechanism (60) is housed,
    a toggle (62) formed by a pair of first and second rods (68, 70) articulated on one another by means of a first pivoting spindle (72),
    a switching bar (76) mechanically coupled to the first rod (68), and acting as support for the movable contacts (24) of all the poles, said bar (76) being mounted in rotation around a second parallel spindle (112), to perform closing and opening of the contacts (34, 36, 24),
    a tripping hook (82) pivotally mounted between a loaded position and a tripped position around a third spindle (83) of the support plates (78, 80), and articulated simultaneously on the second rod (70),
    an operating handle (64) securedly united to a base (92) articulated on a fourth fixed spindle (94) of the support plates (78, 80),
    a latch (58) cooperating with an end (84) of the tripping hook (82) to form a mechanical latching in the loaded position,
    a connecting spring (88) secured between the first spindle (72) and the base (92) of the handle (64),
    and a locking lever (96) cooperating with the bar (76) to block the base (92) in an intermediate position S of the handle (64) when the contacts are welded, said locking lever (96) being pivotally mounted on a fifth spindle (98) of the support plates (78, 80), and comprising a stop (102) able to occupy a first active position or a second inactive position according to the angular position of the bar (76),
    characterized in that
    the locking lever (96) comprises a radiating bearing surface (106) cooperating with a protuberance (74, 110) of the bar (76) to keep holding the locking lever (96) in the first active position of the stop (102), during a first part of the opening travel of the movable contact (24) of each pole, and a notch (105) for receiving said protuberance (74, 110) causing unblocking of the locking lever (96) to release the base (92) near the end of the opening travel of the movable contact (24).
  2. The operating mechanism according to claim 1, characterized in that the bearing surface (106) of the locking lever (96) is formed by an arc of a circle centred on the second spindle (112) of the bar (76), and that the protuberance (74) comprises an appreciably rounded end (110) cooperating with said bearing surface (106).
  3. The operating mechanism according to claim 1, characterized in that the bearing surface (106) of the locking lever (96) comprises a flat portion extending appreciably according to a direction tangent to the protuberance (110) when rotation of the bar (76) takes place during the first part of the opening travel.
  4. The operating mechanism according to claim 2 or 3, characterized in that the stop (102) is situated on the locking lever (96) between the bearing surface (106) and the fifth spindle (98), and that the base (92) is provided with a blocking lug (104) designed to come into engagement in said intermediate position S of the handle (64) against the stop (102) which is in the active position.
  5. The operating mechanism according to claim 4, characterized in that the fifth pivoting spindle (98) of the locking lever (96) is situated between the connecting spring (88) and the handle (64), extending parallel to the second spindle (112) of the bar (76).
  6. The operating mechanism according to one of the claims 1 to 5, characterized in that the protuberance (74, 110) slides along the radiating bearing surface (106) in the course of rotation of the bar (76) generating the first part of the opening travel, unblocking of the locking lever (96) taking place after the handle (64) has passed the intermediate position S situated between the opening deadpoint PMO and the open position O.
  7. The operating mechanism according to one of the claims 1 to 6, characterized in that the locking lever (96) is in the shape of a fork (100), in which said half-open notch (105) is bounded by the radiating bearing surface (106), and by a tooth (108).
EP94410027A 1993-04-20 1994-04-14 Actuating mechanism for electric modular circuit breaker Expired - Lifetime EP0633591B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304858A FR2704354B1 (en) 1993-04-20 1993-04-20 CONTROL MECHANISM OF A MODULAR ELECTRIC CIRCUIT BREAKER.
FR9304858 1993-04-20

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EP0633591A1 EP0633591A1 (en) 1995-01-11
EP0633591B1 true EP0633591B1 (en) 1999-07-28

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US (1) US5449871A (en)
EP (1) EP0633591B1 (en)
DE (1) DE69419670T2 (en)
ES (1) ES2136181T3 (en)
FR (1) FR2704354B1 (en)

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Also Published As

Publication number Publication date
FR2704354B1 (en) 1995-06-23
FR2704354A1 (en) 1994-10-28
DE69419670D1 (en) 1999-09-02
ES2136181T3 (en) 1999-11-16
US5449871A (en) 1995-09-12
DE69419670T2 (en) 2000-04-06
EP0633591A1 (en) 1995-01-11

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