EP0408466B1 - Operating mechanism for an electric switch - Google Patents
Operating mechanism for an electric switch Download PDFInfo
- Publication number
- EP0408466B1 EP0408466B1 EP19900420298 EP90420298A EP0408466B1 EP 0408466 B1 EP0408466 B1 EP 0408466B1 EP 19900420298 EP19900420298 EP 19900420298 EP 90420298 A EP90420298 A EP 90420298A EP 0408466 B1 EP0408466 B1 EP 0408466B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contacts
- lever
- toggle
- operating mechanism
- closed
- 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
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Classifications
-
- 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
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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
Definitions
- Document DE-A 3516 217 discloses a control mechanism for a miniature circuit breaker, in which a bearing surface of the contact arm blocks the end of the transmission link in the event of soldering of the contacts.
- the handle occupies an intermediate position indicating the closed-welded state of the contacts, but forced actuation of the handle towards the open position risks causing the contacts to tear off.
- the object of the invention consists in perfecting the production of a circuit breaker control mechanism.
- the mechanism according to the invention is characterized in that the hooking hook is equipped with a protrusion coming into engagement against a fixed stop fixed to the housing in the closed-welded state of the contacts, to stop the lever in a position intermediate S predetermined, located between the extreme positions F closed and O open, the exceeding of neutral point of the first toggle making said intermediate position S stable for the indication of contact soldering.
- the protuberance is arranged opposite the retaining spout relative to the transmission link.
- the articulation point of the second toggle joint is inserted between the retaining spout and the axis of the hanging hook.
- the housing includes a cavity arranged in the vicinity of said stop. In the open position O of the lever, the protuberance is opposite the cavity with the interposition of a predetermined clearance.
- the mechanism 10 for controlling a miniature electric circuit breaker with molded insulating housing 12 is of the type described in French patent application No. 2616 583.
- the mechanism 10 actuates a movable contact arm 14 whose free end carries a contact piece 16 cooperating with a fixed contact 18.
- An orifice 20 is formed in the front face 22 of the housing 12 for the passage of a lever 24 mounted with limited pivoting on an axis 26 and movable between a closed position F (fig. 1) in which the contacts 16, 18 are closed, and an open position O (fig. 2) corresponding to the separation of the contacts 16, 18.
- the lever 24 is equipped with an internal base 27 coupled to a transmission link 28, in particular in steel, to form a first toggle joint 30 whose articulation 32 on the base 27 is eccentric relative to the axis 26 fixed to the handle 24.
- This first toggle joint 30 is designed to give the two stable positions of the handle 24 (FIGS. 1 and 2).
- the fixed contact 18 is secured to the casing of the electromagnetic trip device, of which only the striker 34 is shown in the figures.
- the contact arm 14 is fixed to a support lever 36 made of insulating material, articulated on a pivot 38 of a rotary plate 40.
- a contact pressure spring 41, of the torsion type, is mounted on the pivot 38 between the plate 40 and the support lever 36.
- a trigger lever 42 controlled by the striker 34 of the electromagnetic trigger, and the bimetallic strip 44 of the thermal trigger, is pivotally mounted on an axis 46 carried by the plate 40 with a predetermined offset relative to the pivot 38.
- a mechanical link 48 with a breakable connecting rod comprises a second toggle provided between the lever 24 and the plate 40 for driving the contact arm 14.
- the link 48 authorizes manual control of the mechanism 10 by the lever 24.
- the movement trigger lever 42 to the triggered position under the action of the thermal or electromagnetic trigger, causes the momentary break of the link mechanical 48, causing the automatic triggering of the mechanism 10, independently of the lever 24.
- the trigger lever 42 is associated with a return spring (not shown) intended to ensure the automatic restoration of the mechanical link 48 when the lever 24 is actuated towards the open position, following a triggering of the mechanism 10 on fault.
- the second toggle link of the mechanical link 48 with breakable link comprises the transmission link 28 cooperating with a hook 50 for hooking pivotally mounted on an axis 52 of the plate 40. Opposite the axis 52, the spout 53 for retaining the hook 50 cooperates in the locked position of the link 48 with a notch in the upper arm 54 of the trigger lever 42.
- the transmission link 28 is coupled to the hook 50 at a point 56 of articulation situated between the axis 52 and the retaining spout 53. This results in a multiplying stage in the kinematic chain of the mechanism 10, allowing a reduction in the tripping force coming from the magnetothermal trigger.
- the mechanism 10 is provided with an energy storage spring 61 interposed between the plate 40 and the housing 12.
- the bimetallic strip 44 of the thermal trip device cooperates with the trip lever 42 by means of a rotary slide 60 with unidirectional transmission.
- the drawer 60 is formed by a bent lever having one end freely coupled to the lower arm of the trigger lever 42 at a point of articulation 62.
- the curved intermediate part of the transmission lever is supported on a boss 64 of the trigger lever 42 of so as to drive the latter towards the position triggered during the deflection to the right of the bimetallic strip 44 in the event of the circulation of an overload current in the pole.
- the slide 60 constitutes a rigid kinematic connection between the bimetallic strip 44 and the release lever 42.
- the absence of parasitic friction between the slide 60 and the release lever 42 allows a significant reduction in the release force transmitted by the bimetallic strip 44.
- the articulation point 62 is disposed between the boss 64 and the pivot axis 46 of the trigger lever 42.
- the striker 34 of the electromagnetic trip device acts on the lower arm of the trip lever 42 to ensure the unlocking of the hook 50 for hooking by escaping the retaining notch 54.
- the trigger lever 42 is thus moved to the triggered position in the trigometric direction, without any braking reaction from the thermal trigger drawer 60 which remains inactive thanks to the presence of the flexible connection with the bimetallic strip 44.
- the hook 50 has a protuberance 70 arranged opposite the retaining spout 53 relative to the link 28 and the point of articulation 56 of the second toggle joint.
- a cavity 72 is arranged in the internal part of the housing 12 in the vicinity of a stop 74 for limiting the stroke of the hook 50.
- the stop 74 is constituted by a fixed part of the housing 12 capable of interfering with the protuberance 70 in the welding state of contacts 16, 18.
- the angle ⁇ of the breakable connecting rod has a predetermined value comprised between the minimum and maximum values illustrated in FIGS. 1 and 2 respectively.
- the link 48 with breakable rod works in compression during normal operation in closing and opening of the mechanism 10.
- the link 48 works in traction in the event of an attempt to forced opening of the lever 24 in the intermediate position S.
- the positive blocking of the hook 50 by engagement of the protuberance 70 against the stop 74 secured to the housing 12 is also opposed to any effect of tearing of the contacts 16, 18 in the event of forced actuation of the handle 24 in the opening direction.
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- Breakers (AREA)
- Mechanisms For Operating Contacts (AREA)
Description
L'invention est relative à un mécanisme de commande pour disjoncteur électrique miniature à boîtier isolant renfermant une paire de contacts fixe et mobile , ledit contact mobile étant porté par un bras de contact actionné pour le mécanisme, lequel comporte :
- une manette pivotante accouplée à une biellette de transmission pour former une première genouillère,
- une platine de support du bras de contact, montée à rotation limitée sur un pivot entre les positions de fermeture et d'ouverture des contacts,
- une liaison mécanique à bielle brisable formée par une deuxième genouillère ayant un crochet d'accrochage monté à pivotement sur un axe de la platine, et articulé à la biellette de transmission,
- et un levier de déclenchement coopérant avec le bec de retenue du crochet d'accrochage pour assurer le verrouillage et le déverrouillage de ladite liaison mécanique.
- a pivoting lever coupled to a transmission link to form a first toggle joint,
- a contact arm support plate, mounted with limited rotation on a pivot between the closed and open positions of the contacts,
- a mechanical link with a breakable link formed by a second toggle joint having a hook hook pivotally mounted on an axis of the plate, and articulated to the transmission link,
- and a trigger lever cooperating with the retaining spout of the hanging hook to ensure the locking and unlocking of said mechanical connection.
Un tel mécanisme est décrit dans la demande de brevet français n° 2605454. Ce mécanisme est néanmoins incapable d'indiquer l'état de soudure des contacts pouvant intervenir lors de coupures répétées de courants de court-circuit très importants. Un cadenassage du disjoncteur peut être effectué après actionnement forcé de la manette dans la position d'ouverture alors que les contacts sont soudés.Such a mechanism is described in French patent application No. 2605454. This mechanism is nevertheless unable to indicate the state of soldering of the contacts which can occur during repeated cuts in very large short-circuit currents. Lockout of the circuit breaker can be carried out after forced actuation of the lever in the open position while the contacts are welded.
La fonction de sectionnement et de signalisation apparente de l'ouverture des contacts est déjà connue dans les gros disjoncteurs multipolaires à boîtier isolant moulé, ayant des calibres supérieurs à 100 ampères. Le mécanisme est commun aux différents pôles, et est associé à un barreau de commutation s'étendant transversalement dans le boîtier pour déplacer les contacts mobiles de l'ensemble des pôles. En cas de soudure des contacts, l'actionnement de la poignée ou de la manette jusqu'à la position d'ouverture est impossible, car un dispositif de verrouillage interdit le mouvement poursuivi dans le sens de l'ouverture au delà d'une position intermédiaire. Cette position est néanmoins instable, et en cas de relâchement de la manette, cette dernière revient automatiquement en position fermée. Il en résulte alors une absence de signalisation de soudure des contacts.The function of disconnection and apparent signaling of the opening of the contacts is already known in large multi-pole circuit breakers with molded insulating casing, with ratings greater than 100 amps. The mechanism is common to the different poles, and is associated with a switching bar extending transversely in the housing to move the movable contacts of all the poles. In the event of soldering of the contacts, the actuation of the handle or the lever up to the open position is impossible, since a locking device prevents the movement continued in the direction of opening beyond a position intermediate. However, this position is unstable, and if the handle is released, the handle automatically returns to the closed position. This then results in an absence of signaling of soldering of the contacts.
Le document DE-A 3516 217 divulgue un mécanisme de commande pour un disjoncteur miniature, dans lequel une surface d'appui du bras de contact bloque l'extrémité de la biellette de transmission en cas de soudage des contacts. La manette occupe bien une position intermédiaire indiquant l'état fermé-soudé des contacts, mais un actionnement forcé de la manette vers la position d'ouverture risque de provoquer l'arrachement des contacts.Document DE-A 3516 217 discloses a control mechanism for a miniature circuit breaker, in which a bearing surface of the contact arm blocks the end of the transmission link in the event of soldering of the contacts. The handle occupies an intermediate position indicating the closed-welded state of the contacts, but forced actuation of the handle towards the open position risks causing the contacts to tear off.
Il en est de même dans la demande de brevet français No. 2.631.485 de la demanderesse, dans laquelle une butée directe s'opère entre la manette et le porte contact.It is the same in French patent application No. 2,631,485 of the applicant, in which a direct stop takes place between the lever and the contact carrier.
L'objet de l'invention consiste à perfectionner la réalisation d'un mécanisme de commande d'un disjoncteur.The object of the invention consists in perfecting the production of a circuit breaker control mechanism.
Le mécanisme selon l'invention, est caractérisé en ce que le crochet d'accrochage est équipé d'une protubérance venant en engagement contre une butée fixe solidaire du boîtier dans l'état fermé-soudé des contacts, pour stopper la manette dans une position intermédiaire S prédéterminée, située entre les positions extrêmes F de fermeture et O d'ouverture, le dépassement de point mort de la première genouillère rendant stable ladite position intermédiaire S pour l'indication de soudure des contacts.The mechanism according to the invention, is characterized in that the hooking hook is equipped with a protrusion coming into engagement against a fixed stop fixed to the housing in the closed-welded state of the contacts, to stop the lever in a position intermediate S predetermined, located between the extreme positions F closed and O open, the exceeding of neutral point of the first toggle making said intermediate position S stable for the indication of contact soldering.
On remarque que le blocage du crochet par la butée du boîtier s'oppose à tout effet d'arrachement des contacts en cas d'actionnement forcé de la manette. Tout l'effort exercé sur la manette est alors encaissé par le boîtier.Note that the blocking of the hook by the housing stop opposes any effect of tearing off the contacts in the event of forced actuation of the lever. All the force exerted on the lever is then collected by the housing.
La protubérance est disposée à l'opposé de bec de retenue par rapport à la biellette de transmission. Le point d'articulation de la deuxième genouillère est inséré entre le bec de retenue et l'axe du crochet d'accrochage.The protuberance is arranged opposite the retaining spout relative to the transmission link. The articulation point of the second toggle joint is inserted between the retaining spout and the axis of the hanging hook.
Le boîtier comporte une cavité agencée au voisinage de ladite butée. Dans la position d'ouverture O de la manette, la protubérance se trouve en regard de la cavité avec interposition d'un jeu prédéterminé.The housing includes a cavity arranged in the vicinity of said stop. In the open position O of the lever, the protuberance is opposite the cavity with the interposition of a predetermined clearance.
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple, et représenté aux dessins annexés dans lesquels :
- - La figure 1 est une vue schématique d'un mécanisme de commande de disjoncteur miniature, équipé d'un dispositif indicateur de soudure des contacts et de signalisation apparente de l'ouverture selon l'invention, le disjoncteur étant représenté en position de fermeture;
- - La figure 2 est une vue identique à la figure 1, en position d'ouverture du disjoncteur;
- La figure 3 est une vue analogue à la figure 1, montrant le mécanisme dans l'état soudé des contacts, et manette bloquée en position intermédiaire.
- - Figure 1 is a schematic view of a miniature circuit breaker control mechanism, equipped with a device for indicating contact soldering and apparent signaling of the opening according to the invention, the circuit breaker being shown in the closed position;
- - Figure 2 is a view identical to Figure 1, in the open position of the circuit breaker;
- Figure 3 is a view similar to Figure 1 showing the mechanism in the welded state of the contacts, and handle locked in the intermediate position.
Sur les figures 1 à 3, le mécanisme 10 de commande d'un disjoncteur électrique miniature à boîtier 12 isolant moulé est du type décrit dans la demande de brevet français n° 2616 583.In FIGS. 1 to 3, the
Le mécanisme 10 actionne un bras de contact 14 mobile dont l'extrémité libre porte une pièce de contact 16 coopérant avec un contact fixe 18. Un orifice 20 est ménagé dans la face avant 22 du boîtier 12 pour le passage d'une manette 24 montée à pivotement limité sur un axe 26 et déplaçable entre une position F de fermeture (fig. 1) dans laquelle les contacts 16, 18 sont fermés, et une position O d'ouverture (fig. 2) correspondant à la séparation des contacts 16, 18. La manette 24 est équipée d'une embase 27 interne accouplée à une biellette 28 de transmission, notamment an acier, pour constituer une première genouillère 30 dont l'articulation 32 sur l'embase 27 se trouve excentrée par rapport à l'axe 26 fixe de la manette 24. Cette première genouillère 30 est conçue pour donner les deux positions stables de la manette 24 (fig. 1 et 2).The
Un ressort de rappel 31 intégré dans l'embase 27 sollicite la manette 24 vers la position O d'ouverture après dépassement du point mort de la première genouillère. Le contact fixe 18 est solidarisé à la carcasse du déclencheur électromagnétique, dont seul le percuteur 34 est représenté sur les figures. Le bras de contact 14 est fixé à un levier support 36 en matériau isolant, articulé sur un pivot 38 d'une platine 40 rotative. Un ressort de pression de contact 41, du type à torsion, est monté sur le pivot 38 entre la platine 40 et le levier support 36.A
Un levier de déclenchement 42 piloté par le percuteur 34 du déclencheur électromagnétique, et la bilame 44 du déclencheur thermique, est monté à pivotement sur un axe 46 porté par la platine 40 avec un décalage prédéterminé par rapport au pivot 38.A
Une liaison mécanique 48 à bielle brisable comporte une deuxième genouillère ménagée entre la manette 24 et la platine 40 d'entraînement du bras de contact 14. En position verrouillée, la liaison 48 autorise la commande manuelle du mécanisme 10 par la manette 24. Le déplacement du levier de déclenchement 42 vers la position déclenchée sous l'action du déclencheur thermique ou électromagnétique, provoque la rupture momentanée de la liaison mécanique 48, entraînant le déclenchement automatique du mécanisme 10, indépendamment de la manette 24. Le levier de déclenchement 42 est associé à un ressort de rappel (non représenté) destiné à assurer le rétablissement automatique de la liaison mécanique 48 lorsque la manette 24 est actionnée vers la position d'ouverture, suite à un déclenchement du mécanisme 10 sur défaut.A
La deuxième genouillère de la liaison mécanique 48 à bielle brisable comporte la biellette de transmission 28 coopérant avec un crochet 50 d'accrochage monté à pivotement sur un axe 52 de la platine 40. A l'opposé de l'axe 52, le bec 53 de retenue du crochet 50 coopère en position verrouillée de la liaison 48 avec un cran du bras supérieur 54 du levier de déclenchement 42. La biellette de transmission 28 est accouplée au crochet 50 en un point 56 d'articulation situé entre l'axe 52 et le bec de retenue 53. Il en résulte un étage démultiplicateur dans la chaîne cinématique du mécanisme 10, autorisant une réduction de l'effort de déclenchement en provenance du déclencheur magnétothermique.The second toggle link of the
Le mécanisme 10 est doté d'un ressort accumulateur d'énergie 61 intercalé entre la platine 40 et le boîtier 12.The
La bilame 44 du déclencheur thermique coopère avec le levier de déclenchement 42 au moyen d'un tiroir rotatif 60 à transmission unidirectionnelle. Le tiroir 60 est formé par un levier coudé ayant une extrémité accouplée librement au bras inférieur du levier de déclenchement 42 en un point d'articulation 62. La partie intermédiaire incurvée du levier de transmission prend appui sur un bossage 64 du levier de déclenchement 42 de manière à entraîner ce dernier vers la position déclenchée lors de la déflexion vers la droite de la bilame 44 en cas de circulation d'un courant de surcharge dans le pôle.The
Lors de la phase de déclenchement thermique, le tiroir 60 constitue une liaison cinématique rigide entre la bilame 44 et le levier de déclenchement 42. L'absence de frottement parasite entre le tiroir 60 et le levier de déclenchement 42 permet une diminution notable de l'effort de déclenchement transmis par la bilame 44. Le point d'articulation 62 est disposé entre le bossage 64 et l'axe 46 de pivotement du levier de déclenchement 42.During the thermal triggering phase, the
En cas de déclenchement magnétique suite à un court-circuit, le percuteur 34 du déclencheur électromagnétique agit sur le bras inférieur du levier de déclenchement 42 pour assurer le déverrouillage du crochet 50 d'accrochage par échappement du cran 54 de retenue. Le levier de déclenchement 42 est ainsi déplacé vers la position déclenchée dans le sens trigométrique, sans aucune réaction de freinage du tiroir 60 de déclenchement thermique qui reste inactif grâce à la présence de la liaison souple avec la bilame 44.In the event of a magnetic trip following a short circuit, the
Selon l'invention, le crochet d'accrochage 50 comporte une protubérance 70 disposée à l'opposé du bec de retenue 53 par rapport à la biellette 28 et au point d'articulation 56 de la deuxième genouillère. Une cavité 72 est agencée dans la partie interne du boîtier 12 au voisinage d'une butée 74 de limitation de la course du crochet 50. La butée 74 est constituée par une partie fixe du boîtier 12 susceptible d'interférer avec la protubérance 70 dans l'état de soudage des contacts 16, 18.According to the invention, the
Le fonctionnement du mécanisme 10 est le suivant :
- En position de fermeture F (fig. 1), la manette 24 se trouve à droite, et la
liaison mécanique 48 à bielle brisable est verrouillée par le levier de déclenchement 42. L'angle α de laliaison 48 à bielle brisable est minimum, notamment de l'ordre de quelques degrés. Le ressort 61 est comprimé. - En cas de déclenchement suite à un défaut, le levier 42 déverrouille le crochet d'accrochage 50, entraînant le basculement de la
liaison 48 à bielle brisable sous l'effet de détente du ressort 61 d'ouverture. L'angle α de la bielle brisable est maximum, et est déterminé par la venue en fin de course de la platine 40.La protubérance 70 ducrochet 50 se trouve alors en regard de la cavité 72 avec interposition d'un jeu 76 prédéterminé qui autorise la venue en butée de la manette 24 contre la partie gauche de l'orifice 20 du boîtier 12 (fig. 2), ce qui correspond à l'état ouvert du disjoncteur, signalé par l'apparition du voyant 75. - En cas se soudage des
contacts 16, 18 (fig. 3), tout mouvement de déclenchement automatique, ou d'ouverture manuelle par la manette 24 amène la protubérance 70 ducrochet 50 contre la butée 74 fixe après une rotation limitée dans le même sens de la platine 40.Le levier support 36 reste immobilisé, et le ressort 41 autorise le mouvement de pivotement relatif entre la platine 40 et le leviersupport 36. Lorsque la protubérance 70 est contre la butée 74, le dépassement de point mort de la première genouillère 30 maintient la manette 24 dans la position intermédiaire S. Le voyant 75 n'est pas visible, ce qui confirme à l'opérateur l'état fermé-soudé des 16, 18.contacts
- In the closed position F (FIG. 1), the
handle 24 is on the right, and themechanical link 48 with a breakable link is locked by therelease lever 42. The angle α of thelink 48 with a breakable link is minimum, especially of the order of a few degrees. Thespring 61 is compressed. - In the event of tripping following a fault, the
lever 42 unlocks thehook 50, causing thelink 48 to break with a breakable link under the effect of trigger of openingspring 61. The angle α of the breakable connecting rod is maximum, and is determined by the arrival at the end of travel of theplate 40. Theprotuberance 70 of thehook 50 is then located opposite thecavity 72 with interposition of apredetermined clearance 76 which allows thelever 24 to come into abutment against the left part of theorifice 20 of the housing 12 (FIG. 2), which corresponds to the open state of the circuit breaker, indicated by the appearance of theindicator light 75. - In case of welding of the
contacts 16, 18 (fig. 3), any movement of automatic triggering, or of manual opening by thelever 24 brings theprotuberance 70 of thehook 50 against the fixedstop 74 after a limited rotation in the same direction of theplate 40. Thesupport lever 36 remains immobilized, and thespring 41 authorizes the relative pivoting movement between theplate 40 and thesupport lever 36. When theprotuberance 70 is against thestop 74, the overshoot of thefirst toggle switch 30 keeps thelever 24 in the intermediate position S. Theindicator light 75 is not visible, which confirms to the operator the closed-welded state of the 16, 18.contacts
Le blocage de la protubérance 70 par la butée 74 élimine la course parasite du crochet 50 sur la platine 40, et empêche la liaison 40 à bielle brisable de se tendre au maximum. Dans la position intermédiaire S de la manette 24 (fig. 3), l'angle α de la bielle brisable possède une valeur prédéterminée comprise entre les valeurs minimum et maximum illustrées respectivement aux figures 1 et 2.The blocking of the
La liaison 48 à bielle brisable travaille en compression lors du fonctionnement normal en fermeture et en ouverture du mécanisme 10. Par contre, dans l'état fermé-soudé des contacts 16, 18, la liaison 48 travaille en traction en cas de tentative d'ouverture forcée de la manette 24 dans la position intermédiaire S. Le blocage positif du crochet 50 par engagement de la protubérance 70 contre la butée 74 solidaire du boîtier 12 s'oppose d'autre part à tout effet d'arrachement des contacts 16, 18 en cas d'actionnement forcé de la manette 24 dans le sens d'ouverture.The
Claims (4)
- An operating mechanism for a miniature electrical circuit breaker with an insulating case (12) housing a pair of stationary (18) and movable (16) contacts, said movable contact (16) being supported by a contact arm (14) actuated by the mechanism, which comprises :- a pivoting handle (24) coupled to a transmission rod (28) to form a first toggle (30),- a support plate (40) of the contact arm (14), mounted with limited rotation on a pivot (38) between the closed and open positions of the contacts (16, 18),- a mechanical breakable rod link (48) formed by a second toggle having a latch (50) pivotally mounted on a spindle (52) of the support plate (40), and articulated on the transmission rod (28),- and a trip lever (42) cooperating with the retaining nose (53) of the latch (50) to perform locking and unlocking of said mechanical link (48), characterized in that the latch (50) is equipped with a protuberance (70) designed to come into engagement against a fixed stop (74) securedly united to the case (12) when the contacts (16, 18) are in the closed-welded state, in such a way as to stop the handle (24) in a predetermined intermediate position S, situated between the extreme closed F and open O positions, passing of the dead point of the first toggle (30) rendering said intermediate position S stable for indication of welding of the contacts (16, 18).
- The operating mechanism according to claim 1, characterized in that the protuberance (70) is located opposite the retaining nose (53) with respect to the transmission rod (28), the articulation point (56) of the second toggle being inserted between the retaining nose (53) and the spindle (52) of the latch (50).
- The operating mechanism according to claim 1 or 2, characterized in that the case (12) comprises a cavity (72) arranged in the vicinity of said stop (74) and that the protuberance (70) is located facing the cavity (72) with interposition of a preset clearance (76) in the open position O of the handle (24).
- The operating mechanism according to one of the claims 1 to 3, characterized in that the plate (40) is associated with an energy storage spring (61) compressed when the circuit breaker is closed, and that the contact arm (14) is secured to a support lever (36) mounted on the pivot (38) of the plate (40) with interposition of a contact pressure spring (41).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8909475 | 1989-07-11 | ||
FR8909475A FR2649826B1 (en) | 1989-07-11 | 1989-07-11 | CONTROL MECHANISM FOR ELECTRIC CIRCUIT BREAKER |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0408466A2 EP0408466A2 (en) | 1991-01-16 |
EP0408466A3 EP0408466A3 (en) | 1991-03-27 |
EP0408466B1 true EP0408466B1 (en) | 1994-12-07 |
Family
ID=9383774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19900420298 Expired - Lifetime EP0408466B1 (en) | 1989-07-11 | 1990-06-25 | Operating mechanism for an electric switch |
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Country | Link |
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EP (1) | EP0408466B1 (en) |
DE (1) | DE69014741T2 (en) |
ES (1) | ES2067711T3 (en) |
FR (1) | FR2649826B1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4116454A1 (en) * | 1991-05-18 | 1992-11-19 | Licentia Gmbh | MECHANISM FOR A SELF-SWITCH |
FR2733087B1 (en) * | 1995-04-13 | 1997-06-06 | Schneider Electric Sa | ELECTRICAL APPARATUS AND IN PARTICULAR CIRCUIT-BREAKER EQUIPPED WITH A SAFETY DEVICE |
ATE262732T1 (en) * | 1999-12-21 | 2004-04-15 | Hager Electro | SAFETY DEVICE FOR ELECTRICAL DEVICE |
FR2863403B1 (en) * | 2003-12-08 | 2006-01-20 | Schneider Electric Ind Sas | DEVICE FOR SIGNALING THE TRIGGERING OF AN ELECTRICAL PROTECTION DEVICE AND ELECTRICAL PROTECTION APPARATUS COMPRISING THE SAME |
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 |
ES2390264T3 (en) | 2009-12-11 | 2012-11-08 | Schneider Electric Industries Sas | Cutting device with contact welding indicator |
FR2974664B1 (en) * | 2011-04-29 | 2013-12-20 | Hager Electro Sas | FAULT TRIP INDICATOR BY THE POSITION OF THE KNOB |
CN103367054B (en) * | 2012-03-28 | 2016-06-08 | 上海良信电器股份有限公司 | The actuating mechanism of isolating switch |
CN108807098B (en) * | 2017-05-04 | 2023-08-22 | 周思雨 | Miniature circuit breaker and handle automatic closing assembly and closing method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2623141A (en) * | 1939-04-06 | 1952-12-23 | Heinemann Electric Co | Circuit breaker |
DE7508649U (en) * | 1974-05-14 | 1975-08-28 | Kopp H | High performance circuit breaker |
FR2436491A1 (en) * | 1978-09-12 | 1980-04-11 | Merlin Gerin | LOW VOLTAGE MULTIPOLAR ELECTRIC CIRCUIT BREAKER WITH AUXILIARY CONTROL BLOCKS |
IT1121759B (en) * | 1979-06-01 | 1986-04-23 | Bassani Spa | AUTOMATIC SINGLE POLE SWITCH |
DE3033213C2 (en) * | 1980-08-29 | 1982-10-21 | Siemens AG, 1000 Berlin und 8000 München | Low voltage circuit breaker with a locking lever |
FR2614467A1 (en) * | 1987-04-21 | 1988-10-28 | Telemecanique Electrique | PROTECTIVE SWITCHING APPARATUS WITH SIMPLIFIED TRIGGERING MECHANISM |
FR2616583B1 (en) * | 1987-06-09 | 1995-01-06 | Merlin Gerin | CONTROL MECHANISM OF A MINIATURE ELECTRIC CIRCUIT BREAKER |
-
1989
- 1989-07-11 FR FR8909475A patent/FR2649826B1/en not_active Expired - Fee Related
-
1990
- 1990-06-25 EP EP19900420298 patent/EP0408466B1/en not_active Expired - Lifetime
- 1990-06-25 DE DE1990614741 patent/DE69014741T2/en not_active Expired - Fee Related
- 1990-06-25 ES ES90420298T patent/ES2067711T3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2649826B1 (en) | 1995-11-24 |
EP0408466A2 (en) | 1991-01-16 |
ES2067711T3 (en) | 1995-04-01 |
FR2649826A1 (en) | 1991-01-18 |
DE69014741D1 (en) | 1995-01-19 |
DE69014741T2 (en) | 1995-06-01 |
EP0408466A3 (en) | 1991-03-27 |
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