EP0224396B1 - Control mechanism for a low-tension electric circuit breaker - Google Patents

Control mechanism for a low-tension electric circuit breaker Download PDF

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Publication number
EP0224396B1
EP0224396B1 EP19860402267 EP86402267A EP0224396B1 EP 0224396 B1 EP0224396 B1 EP 0224396B1 EP 19860402267 EP19860402267 EP 19860402267 EP 86402267 A EP86402267 A EP 86402267A EP 0224396 B1 EP0224396 B1 EP 0224396B1
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EP
Grant status
Grant
Patent type
Prior art keywords
lever
plate
position
circuit breaker
handle
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
EP19860402267
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German (de)
French (fr)
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EP0224396A1 (en )
Inventor
Michel Lazareth
William Bartolo
Patrick Rousset
Gérard Hervouet
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Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10Operating or release mechanisms
    • H01H71/50Manual reset mechanisms which may be also used for manual release
    • H01H71/52Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526Manual 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
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/046Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using snap closing mechanisms
    • H01H2300/048Snap closing by latched movable contact, wherein the movable contact is held in a minimal distance from the fixed contact during first phase of closing sequence in which a closing spring is charged

Description

  • L'invention est relative à un mécanisme de commande d'un disjoncteur électrique ayant une paire de contacts séparables, logés dans un boîtier isolant moulé, et comprenant: The invention relates to a control mechanism of an electric circuit breaker having a pair of separable contacts, housed in a molded insulating case, and comprising:
    • une mannette de manoeuvre manuelle montée à basculement sur un axe entre une position O d'ouverture et une position F de fermeture, a manual operating joypad mounted with rocking on a spindle between an open position O and a closed position F,
    • une biellette de transmission accouplée à la manette pour former une genouillère, a transmission rod coupled to the handle to form a toggle,
    • un ressort de rappel de la manette vers la position O d'ouverture, a spring biasing the lever toward the open position O,
    • une platine montée à rotation sur un pivot, et ayant une butée d'accrochage coopérant par encliquetage avec l'extrémité libre de la biellette, de manière à constituer une liaison mécanique entre la manette et la platine, a rotation plate mounted on a pivot, and having a latching stop cooperating by latching with the free end of the rod, so as to constitute a mechanical link between the handle and the plate,
    • un levier de déclenchement pour provoquer la rupture de ladite liaison mécanique par désencliquetage de la biellette et de la butée, suite à un défaut entraînant le déclenchement automatique du mécanisme, indépendamment de la manette, a trip lever to cause breaking of said mechanical linkage by unlatching the rod and the stop, following a fault resulting in automatic tripping of the mechanism, independently from the handle,
    • et un système élastique assurant la pression de contact en position de fermeture des contacts et le déplacement de la platine vers la position d'ouverture après déclenchement, le contact mobile étant porté par un bras de contact en matériau conducteur. and an elastic system ensuring contact pressure in the contact closed position and movement of the platen to the open position after tripping, the movable contact being carried by a contact arm made of conducting material.
  • Ce type de mécanisme autorise une commande manuelle par pivotement de la manette de manoeuvre et une commande automatique par déclenchement piloté au moyen d'un déclencheur thermique et/ou électromagnétique entraînant en cas de surcharge la brisure de la chaîne cinématique entre la manette et le bras de contact. This type of mechanism allows manual control by pivoting the operating handle and automatic control by controlled release by means of a thermal trip device and / or electromagnetic driving in case of the breaking load of the kinematic chain between the handle and the arm of contact.
  • Les organes mécaniques des mécanismes connus sont généralement montés sur des articulations formées par exemple, par des aiguilles logées individuellement dans des paliers ménagés, soit dans le boîtier isolant, soit dans une paire de platines fixes de support. The mechanical components of the known mechanisms are generally mounted on hinges formed for example, by needles individually housed in bearings formed either in the insulating housing or in a pair of fixed support plates. Le montage d'un tel mécanisme est compliqué et nécessite un positionnement précis des organes d'actionnement qui rallonge le temps de montage du disjoncteur. The installation of such a mechanism is complicated and requires precise positioning of the actuators which lengthens the circuit breaker assembly time.
  • Selon le document FR-A-2.350.679, les axes des organes du mécanisme sont montés sur une platine fixe, mais l'effort de désencliquetage exercé par le levier de déclenchement pour briser la liaison mécanique est relativement important et augmente le temps de déclenchement. According to the document FR-A-2350679, the axes of the mechanism members are mounted on a fixed plate, but the disengagement force exerted by the release lever to break the mechanical connection is relatively large and increases the trip time .
  • Selon le document EP-A-147.629, le bras de contact est doté d'une extrémité en L sollicitée par un ressort de compression en appui contre un évidement d'un levier d'entraînement. According to EP-A-147 629, the contact arm has an end L-biased by a compression spring bearing against a recess of a drive lever. Cet agencement du bras de contact ne facilite pas l'automatisation totale du montage du mécanisme. This arrangement of the contact arm does not facilitate full automation of the assembly of the mechanism. L'objet de la présente invention consiste à réaliser un mécanisme de commande de construction simple et fiable, adapté d'une part à une automatisation du montage, et d'autre part à une diminution du temps de déclenchement d'un disjoncteur miniature. The object of the present invention to provide a simple and reliable construction of the control mechanism, adapted firstly to an automated assembly, and secondly to a reduction of the tripping time of a miniature circuit breaker.
  • Le mécanisme de commande selon l'invention est caractérisé en ce que le bras de contact est solidarisé à un levier support isolant articulé sur le pivot de la platine, et que le levier de déclenchement est monté à pivotement sur un axe fixé à la platine, laquelle comporte de plus des moyens d'entraînement bidirectionnel du levier support entre les positions d'ouverture et de fermeture, l'ensemble étant agencé pour assurer en position de fermeture un mouvement relatif de pivotement de faible amplitude entre la platine et le levier support, grâce à un premier ressort de pression de contact appartenant audit système élastique. The control mechanism according to the invention is characterized in that the contact arm is secured to a hinged insulating support lever on the pivot of the plate, and that the trip lever is pivotally mounted on a pin fixed to the plate, which further comprises bi-directional drive means of the support lever between the open and closed positions, the assembly being arranged to ensure in the closed position a relative pivoting movement of small amplitude between the plate and the support lever, with a first contact pressure spring belonging to said elastic system.
  • L'axe d'articulation du levier de déclenchement et le pivot viennent directement de moulage avec la platine, ce qui évite l'utilisation d'aiguilles spéciales. The articulation axis of the trigger lever and the pivot are directly molded with the plate, which avoids the use of special needles.
  • Le mécanisme est avantageusement doté d'un dispositif auxiliaire de fermeture brusque des contacts, grâce à un bras de blocage agencé sur le levier support isolant du bras de contact. The mechanism is advantageously provided with an auxiliary device for sudden closure of contacts, by a blocking arm arranged on the insulating support lever of the contact arm. Le bras de blocage coopère avec un cliquet monté à pivotement sur l'axe de la manette. The locking arm cooperates with a pawl pivotally mounted on the axis of the joystick.
  • La butée d'accrochage de la platine est formée par une encoche présentant une rampe de dégagement destinée à repousser l'extrémité de la biellette vers une position effacée de désencliquetage, lorsque le levier de déclenchement se trouve en position déclenchée. The latching stop of the plate is formed by a notch having a disengagement ramp for pressing the end of the rod to a retracted unlatching position, when the trigger lever is in the tripped position. Le sytème élastique comporte un ressort, agencé pour exercer sur la platine un couple engendrant l'action de déverrouillage de la rampe sur la biellette pour rompre la liaison mécanique. The elastic sytem comprises a spring arranged to exert on the plate a torque causing the unlocking action of the ramp of the rod to break the mechanical link. L'effort de déclenchement issu du déclencheur est minime et doit simplement vaincre l'effort antagoniste du ressort de rappel du levier de déclenchement. The tripping force from the trigger is minimal and must simply defeat the opposing force of the trip lever return spring.
  • Le levier de déclenchement est équipé avantageusement d'un gradin de maintien de l'extrémité de la biellette contre la butée d'accrochage lors de l'établissement de la liaison mécanique. The release lever is equipped advantageously with a holding step of the end of the rod against the latching stop when establishing of the mechanical connection.
  • La présence de la platine constitue à la fois un organe cinématique de transmission de la biellette accouplée à la manette, et un organe de support combiné du bras de contact et du levier de déclenchement. The presence of the platinum constitutes both a kinematic transmission element of the rod coupled to the handle, and a combined support member of the contact arm and the trip lever.
  • Le levier support et le levier de déclenchement s'étendent parallèlement l'un à l'autre avec un décalage transversal par rapport au plan vertical passant par la platine. The support lever and the trip lever extend parallel to one another with a transverse offset from the vertical plane passing through the plate. Le premier bras du levier de déclenchement fait saillie du levier support isolant en direction du déclencheur électromagnétique, lorsque le disjoncteur se trouve en position de fermeture, l'ensemble étant agencé pour que le percuteur du déclencheur électromagnétique entraîne successivement le levier de déclenchement vers la position déclenchée, et le levier support vers la position de séparation des contacts, lorsque le courant du pôle dépasse le seuil de déclenchement dudit déclencheur électromagnétique. The first arm of the trip lever protrudes from the insulating support lever in the direction of the electromagnetic trip device when the circuit breaker is in the closed position, the assembly being arranged so that the striker of the electromagnetic trip device successively drives the trip lever to the position triggered, and the support lever to the separation position of the contacts, when the pole current exceeds the tripping threshold of said electromagnetic trip release.
  • La séparation longitudinale du pivot de la platine et de l'axe de pivotement du levier de déclenchement, et le décalage transversal entre le levier support et le levier de déclenchement, autorisent une commande de déclenchement du pôle voisin, dès le début de la course de déclenchement du percuteur. The longitudinal separation of the pivot of the plate and the pivot axis of the trigger lever, and the transverse offset between the support lever and the trip lever, allow a trip command of the adjacent pole, from the beginning of the race triggering of the firing pin. Un défaut sur une phase entraîne de ce fait un déclenchement simultané des pôles accolés d'un disjoncteur multipolaire. A fault on a phase thereby cause simultaneous operation of the poles adjoining a multipole circuit breaker.
  • Le mécanisme de commande peut comporter un indicateur mécanique de la position des contacts. The control mechanism may include a mechanical indicator of the position of the contacts. Ledit indicateur comprend des repères de positionnement agencés sur le chant supérieur de la platine, se déplaçant en regard de la paroi interne de la face avant du boîtier, laquelle comporte une fenêtre de visualisation des repères. Said indicator comprises positioning marks arranged on the upper edge of the plate, moving facing the inside wall of the front of the housing, which comprises a viewing window of the pins.
  • D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de plusieurs modes de réalisation de l'invention, donnés à titre d'exemples non limitatifs et représentés aux dessins annexés dans lesquels: Other advantages and features will become more apparent from the following description of several embodiments of the invention, given as non-limiting examples and shown in the accompanying drawings in which:
    • La figure 1 est une vue en élévation du mécanisme de commande selon l'invention, le disjoncteur étant représenté en position de fermeture, Figure 1 is an elevational view of the control mechanism according to the invention, the circuit breaker being represented in the closed position,
    • les figures 2 à 4 montrent des vues de profil et en coupe selon les lignes II-II, III-III, IV-IV, de la figure 1; Figures 2 to 4 show side views in section on the lines II-II, III-III, IV-IV, of Figure 1;
    • la figure 5 est une vue identique de la figure 1, en cours de déclenchement du mécanisme, la manette étant maintenue en position F de fermeture, Figure 5 is an identical view to Figure 1, during tripping of the mechanism, the lever being maintained in the closed position F,
    • la figure 6 est une vue identique de la figure 1, en position d'ouverture du disjoncteur, Figure 6 is an identical view to Figure 1, in the open position of the circuit breaker,
    • les figures 7 à 9 représentent une variante de réalisation du mécanisme selon la figure 1 avec fermeture brusque des contacts, le mécanisme étant représenté respectivement en position d'ouverture, en cours de fermeture et en position de fermeture complète. Figures 7 to 9 show an alternative embodiment of the mechanism according to Figure 1 with sudden closure of contacts, the mechanism being shown respectively in the open position, being closed and in the fully latched position.
  • En référence aux figures 1 à 6, le mécanisme 10 de commande d'un disjoncteur miniature actionne un bras de contact 12 mobile dont l'une des extrémités porte une pièce de contact 14 coopérant avec un contact fixe 16. Le mécanisme 10 est logé à l'intérieur d'un boîtier 18 isolant, au-dessus de la chambre d'extinction d'arc (non représentée). Referring to Figures 1 to 6, 10 operating mechanism of a miniature circuit breaker actuates a movable contact arm 12 of which one end carries a contact piece 14 cooperating with a fixed contact 16. The mechanism 10 is housed within an insulating housing 18, above the arc extinguishing chamber (not shown). Une ouverture 20 est ménagée dans la face avant 21 du boîtier 18 pour le passage d'une manette 22 basculante de commande manuelle, ladite manette étant montée à pivotement limité sur un axe fixe 24 entre une position de fermeture (fig. 1) dans laquelle les contacts 14, 16, sont fermés, et une position d'ouverture (figure 6) correspondant à la séparation des contacts 14, 16. La manette 22 présente une extension interne, accouplée à une biellette de transmission 26 pour constituer un dispositif à genouillère 28 dont l'articulation 30 se trouve excentrée par rapport à l'axe fixe 24 de la manette 22. La portion de l'extension située entre l'axe 24 et l'articulation 30 forme l'autre biellette 32 de la genouillère 28. La biellette de transmission 26 comprend un étrier en U, notamment en fil métallique d'acier. An opening 20 is formed in the front face 21 of the housing 18 for the passage of a tilting lever 22 for manual control, said handle being mounted with limited pivoting on a fixed axis 24 between a closed position (fig. 1) wherein contacts 14, 16 are closed, and an open position (Figure 6) corresponding to separation of the contacts 14, 16. the handle 22 has an internal extension, coupled to a transmission rod 26 to form a toggle device 28, the articulation 30 is located eccentrically with respect to the fixed axis 24 of the lever 22. the portion of the extension between the axis 24 and the hinge 30 forms the other link 32 of the toggle 28. the transmission rod 26 comprises a U-shaped bracket, in particular steel wire. La manette 22 est sollicitée vers la position d'ouverture par un ressort de rappel 34, notamment du type spirale enfilé sur l'axe 24 et dont l'une 35 des extrémités prend appui sur un bossage 36 du boîtier 18. The handle 22 is biased toward the open position by a return spring 34, including the coil type threaded on the shaft 24 and whose one end 35 is supported on a boss 36 of the housing 18.
  • Le contact fixe 16 est porté par un conducteur 17 fixé à la carcasse du déclencheur électromagnétique 66. The fixed contact 16 is carried by a conductor 17 fixed to the body 66 of the electromagnetic trip.
  • A l'opposé de l'articulation 30, l'extrémité libre 37 de la biellette de transmission 26 coopère par encliquetage avec une butée d'accrochage 38 agencée sur une platine 40. Cette dernière est montée à basculement sur un pivot 42 cylindrique, positionné transversalement dans des paliers 44 alignés, ménagés dans les faces opposées du boîtier 18. La platine 40 comporte un axe 46 excentré par rapport au pivot 42, et le levier de déclenchement 48 est monté à pivotement limité sur l'axe 46 entre une position armée et une position déclenchée. In contrast to the joint 30, the free end 37 of the transmission rod 26 cooperates with a snap latching stop 38 arranged on a plate 40. This latter is mounted with rocking on a pivot 42 cylindrical, positioned transversely aligned in bearings 44, provided in the housing of the opposed faces 18. the plate 40 has an axis 46 eccentric with respect to pivot 42, and the trigger lever 48 is mounted with limited pivoting on the axis 46 between a cocked position and a triggered position.
  • Le bras de contact 12 en matériau conducteur, notamment en cuivre, est fixé à un levier support 50 en matériau isolant, articulé sur le pivot 42 de la platine 40 à l'opposé du levier de déclenchement 48. La platine 40 est équipé d'un taquet 52 d'entraînement du levier support 50 entre les positions d'ouverture et de fermeture du bras de contact 12. La fixation du bras de contact 12 au levier support 50 isolant peut s'effectuer par soudage aux ultrasons. The contact arm 12 of conductive material, particularly copper, is attached to a lever support 50 of insulating material, hinged to the pivot 42 of the plate 40 away from the trip lever 48. The plate 40 is equipped with a cam drive 52 of the support lever 50 between the open and closed positions of the contact arm 12. the fixing of the contact arm 12 to the lever support 50 insulation can be effected by ultrasonic welding.
  • Un ressort 54 de pression de contact, du type à torsion, entoure coaxialement le pivot 42 en prenant appui sur un bossage 55 du levier support 50, et un ergot 56 de la platine 40. Un ressort 58 accumulateur d'énergie, du type à compression est agencé entre une butée 60 fixe du boîtier 18 et la platine 40 basculante, et sollicite cette dernière vers la position d'ouverture, lors du déclenchement du mécanisme 10. La présence du ressort 54 permet un mouvement relatif de faible amplitude entre la platine 40 et le levier support 50. A spring 54 of contact pressure, the torsion type, coaxially surrounding the pivot bearing 42 on a boss 55 of the support lever 50 and a lug 56 of the plate 40. A spring 58 energy storage type compression is arranged between a fixed stop 60 of the housing 18 and the rocking sinker 40, and biases the latter towards the opening position during the tripping of the mechanism 10. the presence of the spring 54 allows relative movement of small amplitude between the plate 40 and the support lever 50.
  • Le levier de déclenchement 48 pivotant sur l'axe 46 comporte un bras de levier 62 inférieur pouvant être actionné, soit par le percuteur 64 d'un déclencheur électromagnétique 66, soit par un tiroir 68 de déverrouillage coopérant avec la bilame 70 du déclencheur thermique. 48 the pivotal trip lever 46 about the axis 62 comprises a lower lever arm can be actuated either by the striker 64 of an electromagnetic trigger 66, either by a drawer 68 release cooperating with the bimetal 70 of the thermal trip. Le tiroir 68 est guidé en translation au moyen d'un couloir de guidage 71 conformé dans le boîtier 18. Le bras de levier 72 supérieur du levier de déclenchement 48 est équipé d'un gradin 74 coopérant avec l'extrémité libre 37 de la biellette de transmission 26. Un ressort de rappel 76 du type à spirale est enfilé autour de l'axe 46 et sollicite le levier de déclenchement 48 vers la position armée. The slide 68 is guided in translation by means of a guide channel 71 configured in the housing 18. The lever arm 72 of the upper triggering lever 48 is equipped with a step 74 co-operating with the free end 37 of the link transmission 26. A return spring 76 of the spiral type is fitted around the shaft 46 and biases the release lever 48 toward the cocked position.
  • Dans cette position armée (figure 1), l'extrémité 37 de la biellette 26 repose sur la face d'appui du gradin 74 et est maintenue par le bras de levier 72 supérieur contre la butée 38 d'accrochage, de manière à former une liaison mécanique entre la manette 22 et la platine 40. Cette liaison peut être interrrompue au cours du déclenchement par désencliquetage de la biellette de transmission 26 avec la butée 38 d'accrochage intervenant lors du pivotement de levier de déclenchement 48 dans le sens trigonométrique (voir figure 5). In this cocked position (Figure 1), the end 37 of the rod 26 rests on the bearing face of the step 74 and is held by the upper lever arm 72 against the stop 38 engaging, so as to form a mechanical connection between the handle 22 and the plate 40. This connection may be interrrompue during tripping unlatching of the transmission rod 26 with the stop 38 of speaker attachment when the trip lever pivot 48 in the counterclockwise direction (see Figure 5).
  • La butée d'accrochage 38 de la platine 40 est formée par une encoche 82 présentant une rampe de dégagement de l'extrémité 37 de la biellette 26 vers une position déverrouillée lors du pivotement du levier de déclenchement 48 vers la position déclenchée. The latching stop 38 of the plate 40 is formed by a notch 82 having a disengagement ramp of the end 37 of the rod 26 to an unlatched position during pivoting of the release lever 48 to the tripped position. La force du ressort 58 d'ouverture du mécanisme est supérieure à celle du ressort 34 de rappel de la manette 22. The force of the spring 58 to open the mechanism is greater than that of the spring 34 biasing the handle 22.
  • Le percuteur 64 du déclencheur électromagnétique 66 comporte un poussoir 65 de déverrouillage en matériau isolant, ayant une extrémité emmanchée à force dans un alésage 86 central du noyau mobile 88, et une extrémité opposée, dotée d'un embout 90 cylindrique s'étendant dans la zone médiane du boîtier 18. L'embout 90 se trouve en regard du levier de déclenchement 48 et du levier support 50, ces derniers étant décalés transversalement l'un de l'autre, de manière à être entraînés successivement par l'embout 90, lors de l'attraction magnétique du noyau mobile 88 du déclencheur électromagnétique 66. En position armée (figure 1), on remarque que le bras de levier 62 inférieur fait saillie du levier support 50 en direction du déclencheur 66. Lors du déclenchement suite à un court-circuit, la propulsion de l'embout 90 du percuteur 64 provoque dans une première phase le pivotement dans le sens trigonométrique du levier de déclenchement 48 vers la position d The striker 64 of the electromagnetic trip device 66 comprises a pusher 65 unlocking of insulating material, having an end force-fitted into a central bore 86 of the movable core 88, and an opposite end, with a cylindrical tip 90 extending into the median area of ​​the housing 18. the tip 90 is located opposite the release lever 48 and lever support 50, the latter being offset transversely from each other, so as to be driven successively by the nozzle 90, when the magnetic attraction of the moving core 88 of the electromagnetic trip device 66. in the cocked position (Figure 1), it is noted that the lower lever arm 62 protrudes from the support lever 50 in the direction of the trigger 66. when the trigger following a short circuit, the propelling of the tip 90 of the striker 64 causes in a first phase the pivoting in the trigonometric direction of the release lever 48 to the position éclenchée, suivi dans une deuxième phase de l'entraînement du levier support 50 du bras de contact 12 vers la position d'ouverture des contacts 16, 14. éclenchée, followed in a second phase of driving the support lever 50 of the contact arm 12 towards the contacts open position 16, 14.
  • La position de la butée 38 d'accrochage sur la platine 40 est située à l'opposé de la zone d'intervention du déclencheur sur le bras de levier 62 par rapport à un plan transversal passant par le pivot 42 et l'axe 46. La partie active du bras de levier 62 inférieur, disposé en regard de l'embout 90 est légèrement convexe pour que l'effort de déclenchement exercé par le percuteur 64 reste sensiblement constant lors du pivotement du levier de déclenchement 48 autour de l'axe 46. The position of the abutment 38 engaging on the plate 40 is located opposite the shutter response area on the lever arm 62 relative to a transverse plane passing through the pivot 42 and the axis 46. the active portion of the lever arm 62 lower, disposed facing the nozzle 90 is slightly convex so that the tripping force exerted by the striker 64 remains substantially constant during the pivoting of the trigger lever 48 around the axis 46 .
  • Le fonctionnement du mécanisme 10 de commande du disjoncteur est le suivant: The operation of the circuit breaker 10 of the control mechanism is the following:
  • COMMANDE MANUELLE MANUAL COMMAND
  • Au cours d'une manoeuvre manuelle du mécanisme 10 du disjoncteur, la chaîne cinématique de liaison de la manette 22 au bras de contact 12, n'est jamais interrompue grâce à l'encliquetage permanent de la biellette 26 dans la butée d'accrochage 38 de la platine 40. Le déplacement de la manette 22 est transmis au bras de contact 12 par l'intermédiaire de la biellette 26, de la platine 40 et du levier support 50 isolant. During a manual operation of the breaker mechanism 10, the connecting kinematic chain of the handle 22 to the contact arm 12, is not interrupted thanks to the permanent locking of the rod 26 in the latching stop 38 of the plate 40. the movement of the handle 22 is transmitted to the contact arm 12 via the link 26, the plate 40 and the lever support 50 insulation. La fermeture manuelle est commandée par pivotement de la manette 22 dans le sens des aiguilles d'une montre vers la position F représentée sur la figure 1. La position F de la manette 22 est stable grâce au dépassement du point mort de la genouillère 28, la force de rappel du ressort 34 s'exerçant sur la manette 22 étant insuffisante pour vaincre l'effort de verrouillage de la genouillère 28. L'ouverture manuelle du disjoncteur résulte d'un déplacement en sens inverse de la manette 22 vers la position O (figure 6) provoquant le brisage de la genouillère 28, et le pivotement dans le sens inverse des aiguilles d'une montre de la platine 40 et du levier support 50 autour du pivot 42. Manual closing is controlled by pivoting the lever 22 in the direction of clockwise to the position F shown in Figure 1. The position F of the lever 22 is stable due to the exceeding of the dead center of the toggle 28, the restoring force of the spring 34 exerted on the handle 22 being insufficient to overcome the toggle locking force 28. the manual opening of the circuit breaker results from a reverse direction movement of the handle 22 towards the position O (Figure 6) causing the breaking activity of the knuckle joint 28 and the pivot in the counterclockwise direction of a watch of the plate 40 and the support lever 50 about the pivot 42.
  • DECLENCHEMENT AUTOMATIQUE TRIGGER AUTOMATIC
  • A la suite d'un courant de surcharge ou de court-circuit, le déclenchement du disjoncteur est provoqué par la bilame 70 du déclencheur thermique ou par le percuteur 64 du déclencheur électromagnétique 66 faisant pivoter le levier de déclenchement 48 dans le sens trigonométrique de la position armée (figure 1) vers la position déverrouillée (figure 5). As a result of an overcurrent or short-circuit tripping the circuit breaker is caused by the bimetal 70 or the thermal trip device 64 by the striker of the electromagnetic trip 66 by pivoting the release lever 48 counterclockwise to the armed position (Figure 1) to the unlocked position (Figure 5). Le bras de levier 72 supérieur s'écarte de l'extrémité 37 de la biellette 26 et provoque la disparition de l'effort de verrouillage. The lever arm 72 upper departs from the end 37 of the rod 26 and causes the disappearance of the locking force. Le couple exercé par le ressort 58 dans le sens d'ouverture sollicite un léger pivotement de la platine 40 dans le sens trigonométrique, de manière à repousser l'extrémité 37 de la biellette 26 vers le bas, après effacement du gradin 74 du levier de déclenchement 48. Au cours de cette première phase de déclenchement s'opèrent le désencliquetage de la biellette 26 avec la butée 38 d'accrochage de la platine 40, et l'interruption de la liaison mécanique entre la manette 22 et le bras de contact 12. Le détente du ressort 58 accumulateur provoque ensuite le libre pivotement du bras de contact 12 et de la platine 40 vers la position d'ouverture représentée à la figure 6. Au cours de cette seconde phase de déclenchement, l'action du ressort 34 de rappel de la manette 22 brise la genouillère 28 en ramenant la manette 22 vers la position O d'ouverture. The torque exerted by the spring 58 in the opening direction is requesting a slight pivoting of the plate 40 in the anticlockwise direction, so as to push the end 37 of the rod 26 downwards, after erasure of the step 74 of the lever trigger 48. during this first phase trigger operating the disengagement of the rod 26 with the abutment 38 engaging the plate 40, and the interruption of the mechanical link between the handle 22 and the contact arm 12 . the expansion of the accumulator spring 58 then causes the free pivoting of the contact arm 12 and the plate 40 to the open position shown in Figure 6. in this second initiation phase, the action of the spring 34 biasing the handle 22 breaks the toggle 28 by returning the handle 22 to the open position O. Le réarmement automatique du mécanisme 10 s'effectue dans cette position par encliquetage de l'extrémité 37 de la biellette 26 avec la butée 38 d'accrochage de la platine 40. Le gradin 74 du bras de levier 72 verrouille la biellette 26, de manière à rétablir la liaison mécanique entre la manette 22 et le levier support 50 du bras de contact 12. Le mécanisme 10 est alors prêt à une nouvelle fermeture par entraînement manuel de la manette 22 de la position O (figure 6) vers la position F (figure 1). The automatic reset of the mechanism 10 is carried in this position by latching the end 37 of the rod 26 with the abutment 38 engaging the plate 40. The step 74 of the lever arm 72 locks the connecting rod 26, so to restore the mechanical connection between the handle 22 and the support lever 50 of the contact arm 12. the mechanism 10 is then ready for a new closing by manual drive of the handle 22 from position O (Figure 6) to the position F ( figure 1).
  • Le chant supérieur de la platine 40 peut être équipé de repères indicateurs des positions d'ouverture ou de fermeture du bras de contact 12. Les repères sont visibles de l'extérieur par une fenêtre (non représentée) ménagée dans la face avant 21, et constituent un indicateur mécanique permettant une visualisation indirecte de la séparation des contacts 14, 16, par l'intermédaire de la platine 40 basculante. The upper edge of the plate 40 can be equipped with indicators pins positions opening or closing of the contact arm 12. The pins are visible from the outside through a window (not shown) formed in the front face 21, and constitute a mechanical indicator for indirect visualization of the separation of the contacts 14, 16, thanks to the use of the rocking sinker 40. Cette visualisation est fiable étant donné que le bras de contact 12 est solidaire du levier support 50 entraîné par la platine 40. This visualization is reliable since the contact arm 12 is integral with the lever support 50 driven by the plate 40.
  • Il convient de noter que la platine 40 sert à la fois d'organe de transmission pour la biellette 26 et d'organe de support combiné du bras de contact 12 et du levier de déclenchement 48. Le pivot 42 et l'axe 46 viennent directement de moulage avec la platine 40, ce qui évite l'utilisation d'aiguilles métalliques spéciales. It should be noted that the plate 40 serves both transmission member for the rod 26 and combined bearing member of the contact arm 12 and the trip lever 48. The pivot 42 and the axis 46 are directly molded with the plate 40, which avoids the use of special metal needles. La platine 40 est réalisée par moulage d'un matériau métallique ou plastique. The plate 40 is made by molding of a metal or plastic material. Un système de butées fixes limite la course d'ouverture du mécanisme 10. A system of fixed stops limits the opening stroke of the mechanism 10.
  • Le pivot 42 constitue un axe commun de pivotement de la platine 40 et du levier support 50, de manière à obtenir un encombrement réduit du mécanisme 10. La séparation longitudinale du pivot 42 de la platine 40 et de l'axe 46 de pivotement du levier de déclenchement 48, combinée avec le décalage transversal entre le levier support 50 et le bras de levier 62 inférieur, autorise une commande de déclenchement du pôle voisin dès le début de la course de déclenchement du levier 48. La transmission de l'ordre de déclenchement multipolaire s'opère grâce à un ergot d'entraînement (non représenté), solidarisé au levier de déclenchement 48 au niveau de l'axe 46. Un défaut sur une phase entraîne un déclenchement simultané des pôles accolés d'un disjoncteur multipolaire. The pivot 42 constitutes a common axis of pivoting of the plate 40 and the support lever 50, so as to obtain a reduced footprint of the mechanism 10. The longitudinal separation of the pivot 42 of the plate 40 and the axis 46 of pivoting of the lever trigger 48, combined with the transverse offset between the support lever 50 and the lever lower arm 62, allows a trigger command to the neighboring pole from the start of the firing stroke of the lever 48. the transmission of the tripping order multi-operates with a drive pin (not shown), secured to the release lever 48 at the axis 46. a fault on a phase causes a simultaneous triggering of the poles adjoining a multipole circuit breaker. Le mécanisme 10 est en fait composé de deux sous-ensembles distincts pouvant être prémontés à l'extérieur du boîtier 18 et mis en place automatiquement lors du montage du disjoncteur. The mechanism 10 is actually composed of two separate subassemblies which can be preassembled outside of the housing 18 and set up automatically during assembly of the circuit breaker.
  • Le premier sous-ensemble comprend la platine 40 sur laquelle s'effectue le montage du levier support 50 isolant enfilé sur le pivot 42, et du levier de déclenchement 48 articulé sur l'axe 46. Le bras de contact 12 est relié au bilame 70 par une tresse 94 conductrice. The first sub-assembly comprises the plate 40 on which is made the mounting of the lever support 50 insulating pushed onto the pivot 42, and the trigger lever 48 hinged on the axis 46. The contact arm 12 is connected to the bimetallic strip 70 by a conductive braid 94. Le premier ressort 54 de pression de contact entourant le pivot 42 prend appui sur le bosage 55 du levier support 50 et l'ergot 56 de la platine 40. Le deuxième ressort 76 de rappel du levier de déclenchement 48 est ensuite mis en place autour de l'axe 46. L'installation du premier sous-ensemble s'opère par simple positionnement du pivot 42 dans un palier 44 du boîtier 18, suivi de l'insertion du ressort 58 de compression. The first spring 54 contact pressure surrounding the pivot 42 supported on the bosage 55 of the lever support 50 and the lug 56 of the plate 40. The second spring 76 for returning the trigger lever 48 is then placed around the axis 46. the installation of the first subset passes by positioning the pivot 42 in a bearing 44 of the housing 18, followed by the insertion of spring 58 compression.
  • Le deuxième sous-ensemble comporte la manette 22, son ressort de rappel 34 et la biellette 26 de transmission. The second subassembly includes the handle 22, the return spring 34 and the rod 26 of transmission. Le ressort 34 de torsion est intégré dans la manette 22, et le brin 35 est pris en charge par le bossage 36 du boîtier 18 lors de la mise en place du deuxième sous-ensemble. The torsion spring 34 is built into the handle 22, and the strand 35 is supported by the boss 36 of the housing 18 during the establishment of the second subset. L'extrémité 37 libre de la biellette 26 est ensuite positionée dans l'encoche 82 de la butée d'accrochage 38 pour réaliser la liaison mécanique entre la manette 22 et le bras de contact 12. The free end 37 of the rod 26 is then positionée in the notch 82 of the latching stop 38 for the mechanical connection between the handle 22 and the contact arm 12.
  • Dans la variante du dispositif des figures 7 à 9, les mêmes numéros de repères seront utilisés pour désigner des pièces identiques à celles du disjoncteur selon les figures 1 à 6. Le mécanisme 10 de commande du disjoncteur est équipé d'un dispositif auxiliaire de fermeture brusque, désigné par le repère général 100, et comprenant un cliquet 102 de retenue coopérant avec une rampe 104 s'étendant le long d'un bras 106 de blocage temporaire du levier support 50 isolant. In the variant of the device of Figures 7 to 9, the same reference numbers will be used to designate identical parts to those of the circuit breaker of Figures 1 to 6. The 10 circuit breaker operating mechanism is provided with an auxiliary closing device abrupt, designated by the general reference 100, and 102 comprising a locking pawl cooperating with a ramp 104 extending along an arm 106 of temporary blocking of the lever support 50 insulation. Le cliquet 102 monté à pivotement sur l'axe 24 de la manette 22, est associé à un ressort 108 de rappel qui sollicite le cliquet 102 dans le sens trigonométrique contre une butée 110 de la manette 22. Le bras 106 de blocage est agencé entre la biellette 26 de transmission et le déclencheur électromagnétique 66. Le fonctionnement du dispositif auxiliaire de fermeture brusque 100 est le suivant: The pawl 102 pivotally mounted on the axis 24 of the handle 22, is associated with a return spring 108 that biases the pawl 102 counterclockwise against a stop 110 of the handle 22. The arm 106 is arranged between locking the link 26 and the transmission electromagnetic trigger 66. the operation of the auxiliary device of abrupt closure 100 is as follows:
  • _ la fermeture du disjoncteur s'effectue par un basculement de la manette 22 de la gauche (figure 7) vers la droite (figure 9). _ Closing the circuit breaker occurs by tilting of the handle 22 to the left (Figure 7) to the right (Figure 9). Au début de la course de fermeture, la chaîne cinématique de liaison de la manette 22 à la platine 40 entraîne le bras de contact 12 vers le contact fixe 16. Le cliquet 102 tourne avec la manette 22 dans le sens des aiguilles d'une montre, et se rapproche du bras 106 de blocage du levier support 50, lequel tourne en sens inverse. At the beginning of the closing stroke, the connecting kinematic chain of the handle 22 to the platen 40 drives the contact arm 12 toward the fixed contact 16. The pawl 102 rotates with the handle 22 in the direction of clockwise and approaches the arm 106 for locking the support lever 50, which rotates in the opposite direction. L'engagement du cliquet 102 avec la rampe 104 du bras 106 de blocage stoppe la rotation du levier support 50, et maintient la pièce de contact 14 du bras de contact 12 à une distance d prédéterminée du contact fixe 16 (figure 8). The engagement of pawl 102 with the ramp 104 of the locking arm 106 stops the rotation of the lever bracket 50, and maintains the contact piece 14 of the contact arm 12 at a predetermined distance d from the fixed contact 16 (Figure 8). La platine 40 reste alors immobile, mais l'extrémité du cliquet 102 peut néanmoins glisser le long de la rampe 104, en autorisant le mouvement poursuivi de fermeture de la manette 22. Il en résulte une accumulation d'énergie dans le ressort de rappel 34 de la manette 22 jusqu'à la fin du mouvement de glissement du cliquet 102 sur la rampe 104 (figure 8). The plate 40 then remains stationary, but the end of the pawl 102 can nevertheless slide along the ramp 104, permitting continued movement of closing of the handle 22. This results in an accumulation of energy in the return spring 34 of the handle 22 until the end of the pawl 102 of the sliding movement on the ramp 104 (Figure 8). Le déplacement final de la manette 22 vers la position de la figure 9 provoque le déverrouillage de la platine 40 après libération du bras 106 par le cliquet 102, suivi de la fermeture brusque du bras de contact 12 sous l'action de la chaîne cinématique. The final movement of the handle 22 to the position of Figure 9 causes the unlocking of the plate 40 after the release arm 106 by the pawl 102, followed by the sudden closing of the contact arm 12 under the action of the kinematic chain. La détente du ressort 34 accélère le franchissement de point mort de la genouillère 28. La vitesse de fermeture du contact mobile 14 est ainsi indépendante de la force d'actionnement de la manette 22. The relaxation of the spring 34 accelerates the death crossing point of the toggle lever 28. The movable contact of the closing speed 14 is thus independent of the actuating force from the handle 22.
  • L'ouverture manuelle du disjonctueur s'opère par un mouvement de basculement inverse de la manette 22 (passage de la figure 9 à la figure 7). Manual opening of disjonctueur is effected by a reverse pivoting movement of the handle 22 (portion of Figure 9 to Figure 7). Sous l'action de son ressort de rappel 108, le cliquet 102 s'efface et reste en position inactive, de manière à ne pas entraver le libre pivotement de la platine 40 et du levier support 50 dans le sens trigonométrique jusqu'à la position d'ouverture (figure 7). Under the action of its return spring 108, the pawl 102 is cleared and remains in the inactive position so as not to hinder the free pivoting of the plate 40 and the support lever 50 counterclockwise to the position opening (Figure 7).

Claims (10)

1. An operating mechanism of an electrical circuit breaker, having a pair of separable contacts (16, 14), housed in a moulded insulating case (18), and comprising:
- a manual operating handle (22) pivotally mounted on a spindle (24) between an open position O and a closed position F,
- a transmission rod (26) coupled to the handle (22) to form a toggle-joint (28),
- a return spring (34) of the handle (22) to the open position O,
- a plate (40) mounted with rotation on a pivot (42), and having a latching stop (38) cooperating by latching with the free end (37) of the rod (26), so as to form a mechanical link between the handle (22) and the plate (40),
- a trip lever (48) to cause said mechanical link to be interrupted by unlatching the rod (26) and the stop (38), following a fault bringing about automatic tripping of the mechanism (10), independently from the handle (22),
- and an elastic system ensuring contact pressure in the closed position of the contacts (14, 16), and movement of the plate (40) to the open position after tripping has occured, the moving contact (14) being borne by a contact arm (12) made of conducting material, characterized in that the contact arm (12) is securedly attached to an insulating support lever (50) articulated on the pivot (42) of the plate (40), and that the trip lever (48) is pivotally mounted on a spindle (46) fixed to the plate (40), which comprises in addition two-directional means (52) of driving the support lever (50) between the open and closed positions, the assembly being arranged to ensure in the closed position a relative pivoting movement of small amplitude between the plate (40) and the support lever (50) due to a first contact pressure spring (54) belonging to said elastic system.
2. A circuit breaker operating mechanism according to claim 1, characterized in that the insulating support lever (50) is fitted with a blocking arm (106), able to cooperate with a pawl (102) securedly attached to the handle (22), so as to form a high-speed closing device (100) of the contacts (14, 16).
3. A circuit breaker operating mechanism according to claim 2, characterized in that the pawl (102) is pivotally mounted on the spindle (24) of the handle (22), and is associated with a return spring (108) allowing the pawl (102) to retract to an inactive position due to the action of the arm (106) of the support lever (50), so as not to hinder the rotating movement of the plate (40) in the circuit breaker opening direction.
4. A circuit breaker operating mechanism according to claim 2 or 3, characterized in that the blocking arm (106) of the support lever (50) comprises a sloping part (104) cooperating slidingly with the pawl (102) in the closing direction, said sloping part being arranged to temporarily stop the rotating movement of the support lever (50) and of the plate (40) by maintaining the contact part (14) of the contact arm (12) at a preset distance d from the stationary contact (16), and at the same time to allow the movement of the handle (22) to continue to the closed position,retraction of the pawl (102) taking place at the end of closing travel of the handle (22) bringing about unlocking of the plate (40) and high-speed closing of the contacts (14, 16).
5. A circuit breaker operating mechanism according to one of claims 1 to 4, characterized in that the trip lever (48) comprises a first lever arm (62) able to be actuated by the trip release (66, 70, 68) to a tripped position,and a second lever arm (72) able respectively to lock in the charged position the end (37) of the rod (26) against the latching stop (38) and to unlock said end (37) in the tripped position to break the mechanical link between the toggle-joint (28) and the contact arm (12), characterized in that the latching stop (38) is formed by a notch (82) of the plate (40) presenting a sloping part designed to push the end (37) of the rod (26) to a retracted unlatching position, when the trip lever (48) is in the tripped position.
6. A circuit breaker operating mechanism according to claim 5, comprising a magnetothermal trip release formed by a thermal trip release with a bimetallic strip and an electromagnetic trip release with a striker, characterized in that the support lever (50) and the trip lever (48) extend parallel to one another with a transverse offset in relation to the vertical plane passing through the plate (40), and that the first arm (62) of the trip lever (48) protrudes out from the insulating support lever (50) in the direction of the electromagnetic trip release (66), when the circuit breaker is in the closed position,the assembly being arranged so that the striker (64) of the electromagnetic trip release (66) successively drives the trip lever (48) to the tripped position, and the support lever (50) to the separation position of the contacts (14, 16), when the pole current exceeds the tripping threshold of said electromagnetic trip release (66).
7. A circuit breaker operating mechanism according to claim 6, characterized in that the active part of the first arm (62) of the trip lever (48), disposed facing the striker,is slightly convex so that the tripping force exerted by the electromagnetic trip release remains appreciably constant when the trip lever pivots to the tripped position.
8. A circuit breaker operating mechanism according to one of the claims 5 to 7, characterized in that the elastic system comprises a second energy storage spring (58), designed to exert on the plate (40) a torque tending to break said mechanical link (48) in the tripped position of the trip lever (48), and to cause the plate (40) to pivot to the open position of the circuit breaker, and that the second arm (72) of the trip lever (48) is equipped with a step (74) holding the end (37) of the rod (26) against the latching stop (38) when said mechanical link is established, a return spring (76) biasing the trip lever (48) to the charged position.
9. A circuit breaker operating mechanism according to one of the claims 1 to 8,characterized in that the mechanism (10) is made up of two sub-assemblies which can be pre-assembled outside the case (18), the first sub-assembly comprising the plate (40) on which are mounted the support lever (50) of the contact arm (12) and the trip lever (48), the second sub-assembly comprising the handle (22) associated with the transmission rod (26).
10. A circuit breaker operating mechanism according to one of the claims 1 to 9, comprising a mechanical contact position indicator (14, 16), characterized in that said indicator comprises positioning marks on the upper edge of the plate (40), moving facing the inside wall of the front panel (21) of the case (18), which comprises an indicator mark observation window.
EP19860402267 1985-10-31 1986-10-13 Control mechanism for a low-tension electric circuit breaker Expired - Lifetime EP0224396B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8516344A FR2589627B1 (en) 1985-10-31 1985-10-31 control mechanism for electrical low voltage circuit breaker
FR8516344 1985-10-31

Publications (2)

Publication Number Publication Date
EP0224396A1 true EP0224396A1 (en) 1987-06-03
EP0224396B1 true EP0224396B1 (en) 1991-06-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860402267 Expired - Lifetime EP0224396B1 (en) 1985-10-31 1986-10-13 Control mechanism for a low-tension electric circuit breaker

Country Status (8)

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US (1) US4740770A (en)
EP (1) EP0224396B1 (en)
JP (1) JP2637081B2 (en)
CN (1) CN1013816B (en)
CA (1) CA1279356C (en)
DE (1) DE3679639D1 (en)
ES (1) ES2022814B3 (en)
FR (1) FR2589627B1 (en)

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Also Published As

Publication number Publication date Type
CN86107136A (en) 1987-04-29 application
ES2022814B3 (en) 1991-12-16 grant
JP2637081B2 (en) 1997-08-06 grant
US4740770A (en) 1988-04-26 grant
CN1013816B (en) 1991-09-04 application
CA1279356C (en) 1991-01-22 grant
EP0224396A1 (en) 1987-06-03 application
FR2589627A1 (en) 1987-05-07 application
FR2589627B1 (en) 1988-08-26 grant
DE3679639D1 (en) 1991-07-11 grant
JPS62105333A (en) 1987-05-15 application

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