EP0222645B1 - Operating mechanism for a circuit breaker provided with an energy storing device - Google Patents

Operating mechanism for a circuit breaker provided with an energy storing device Download PDF

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Publication number
EP0222645B1
EP0222645B1 EP86402268A EP86402268A EP0222645B1 EP 0222645 B1 EP0222645 B1 EP 0222645B1 EP 86402268 A EP86402268 A EP 86402268A EP 86402268 A EP86402268 A EP 86402268A EP 0222645 B1 EP0222645 B1 EP 0222645B1
Authority
EP
European Patent Office
Prior art keywords
telescopic link
closing
operating mechanism
circuit breaker
spring
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
EP86402268A
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German (de)
French (fr)
Other versions
EP0222645A1 (en
Inventor
Pierre Baginski
Jean-Pierre Nebon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0222645A1 publication Critical patent/EP0222645A1/en
Application granted granted Critical
Publication of EP0222645B1 publication Critical patent/EP0222645B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H2003/3068—Housing support frame for energy accumulator and cooperating mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2300/00—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H
    • H01H2300/06—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using tools as locking means
    • H01H2300/062—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using tools as locking means for locking a charged spring
    • H01H2300/064—Orthogonal indexing scheme relating to electric switches, relays, selectors or emergency protective devices covered by H01H using tools as locking means for locking a charged spring by means of removable member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices

Definitions

  • the invention relates to a control mechanism according to the preamble of claim 1.
  • Document US-A-3,084,238 discloses a mechanism for a circuit breaker, having a telescopic connection for compression and expansion of a closing spring armed by a latching device.
  • the spring is blocked in the compressed state by a locking system, and allows a slow closing of the contacts.
  • the closing spring remains permanently in place in the mechanism and is not designed to be interchangeable.
  • the mechanism comprises an arming cam, the release of which is caused by the unlocking of a closing pawl.
  • the expansion of the closing spring ensures the abrupt closing of the contacts, and the resetting of the spring takes place, either manually by means of a charging lever, or automatically by an electric motor as soon as the circuit breaker closes in order to be ready for a new operation in the event of opening on fault.
  • Such mechanism for high intensity circuit breakers require significant operating forces which are dependent on the required characteristics and performances, in particular electrodynamic resistance, closing power, etc.
  • Several types of mechanisms having accumulator systems with closing springs of predetermined forces are therefore essential to meet the manufacturing requirements of a range of circuit breakers comprising basic devices and devices of different performance. This results in an increase in the storage volume of the mechanisms, and in management and manufacturing cost problems.
  • the present invention consists in producing for the whole range a standard mechanism having an accumulator system with adaptable springs for the choice of the operating force according to the type. of devices.
  • control mechanism is characterized in that the control means cause the kinematic chain to break with the toggle device authorizing the withdrawal of the subassembly formed by the telescopic connection and the closing spring in the state compressed.
  • the springs are adapted either by adding an additional spring, or by simply replacing the spring or springs of the accumulator system. This is done easily without dismantling the standard mechanism.
  • the telescopic link comprises a guide positioned in a housing of the chassis, and cooperating slidingly with a yoke mechanically coupled to the kinematic chain when the locking member is removed from the telescopic link.
  • the locking member of the telescopic link can be inserted into aligned holes in the yoke and the guide, so as to prevent the spring from relaxing during withdrawal of the telescopic link.
  • a multipolar electric circuit breaker having at least one pair of contacts 10, 12, separable by pole, is actuated by a control mechanism 14 carried by a chassis with parallel flanges 15 and comprising a toggle joint device 16 associated to a trigger hook 18.
  • the toggle joint device 16 (FIG. 1) comprises a pair of rods 20, 22, articulated on a pivot axis 24, the lower link rod 20 for transmission being mechanically coupled to a transverse switching rod 23, common to all of the poles .
  • the bar 23 is constituted by a shaft 26 rotatably mounted between an open position and a closed position of the contacts 10, 12.
  • a connecting rod 30 ( Figures 4 and 5) which connects a crank of the bar 23 to an insulating cage 28 for supporting the movable contact 12.
  • the latter is connected to a connection pad 32 by a flexible conductor 34, in particular a braid.
  • a contact pressure spring 36 is arranged between the cage 28 and the upper face of each movable contact 12.
  • the trigger hook 18 is pivotally mounted on a main axis 38 fixed between an armed position ( Figure 1) and a triggered position.
  • An opening spring 40 is anchored between a lug 42 of the bar 23 and a fixed retaining cleat 44 disposed above the toggle device 16.
  • An opening pawl 46 formed by a locking lever pivotally mounted on a axis 48, is controlled by a first latch 50 in the shape of a half-moon.
  • a spring 52 for returning the opening pawl 46 is located opposite the first latch 50 relative to the axis 48.
  • a stop 54 formed on the opening pawl 46 between the axis 48 and the latch 50, cooperates in the armed position with a V-shaped recess 56 in the trigger hook 18.
  • the upper link 22 of the toggle joint 16 is articulated on an axis 58 of the trigger hook 18 opposite the recess 56.
  • the mechanism 14 comprises a reset cam 62 keyed to the main axis 38 of the hook 18, and cooperating with an energy storage system 64, shown in detail in FIGS. 2 and 3.
  • the energy storage system 64 is equipped with a closing pawl 66 controlled by a second latch 68, and a driving lever 70 pivotally mounted on an axis 69.
  • An elastic energy storage device 71 comprising at least one closing spring 72 is arranged between a housing 74 of the chassis and a finger 76 for transmitting the driving lever 70.
  • the reset cam 62 cooperates with a roller 78 of the lever driver 70, and the closing spring 72 urges the latter to bear on the cam 62.
  • the profile of the cam 62 comprises a first sector 80 for arming the closing spring 72, and a second sector 82 corresponding to the release of the roller 78 authorizing a sudden pivoting of the driving lever 70 anticlockwise under the action of the closing spring 72 (passage from FIG. 3 to FIG. 2).
  • the reset cam 62 is also provided with a lug 84 capable of coming into abutment with the closing pawl 66 when the end of the first sector 80 of the cam 62 is in contact with the roller 78 of the driving lever 70 .
  • the closing spring 72 of the accumulator system 64 is armed, and the contacts 10, 12, are either in the open position or in the closed position depending on the state of the device to be toggle switch 16 of FIG. 1.
  • the roller 78 bearing on the first sector 80 exerts a torque on the reset cam 62 urging the latter in clockwise rotation.
  • the closing pawl 66 opposes this rotation by virtue of the retention of the lug 84 of the cam 62.
  • the mechanism 14 cooperates with a magnetothermal or electronic trip device (not shown) to cause the automatic opening of the contacts 10, 12, in the event of an overload or a fault.
  • a closing operation can be controlled by actuation of the second latch 68 causing the closing pawl 66 to pivot about its axis 88 in the opposite direction. clockwise ( Figure 2).
  • the rearming of the accumulator system 64 by compression of the closing spring 72 is carried out manually or automatically by means of an operating lever or a geared motor (not shown) fixed on the main axis 38.
  • This spring rearming operation closure 72 by rotation of the cam 62 is explained in detail in French patent application No. 2,558,986 of the applicant.
  • the main axis 38 is rotated in a clockwise direction until the lug 84 of the cam 62 comes into abutment on the closing pawl 66.
  • the reset cam 62 rotates with the main axis 38 in the same direction of rotation, and occupies two stable positions, namely an armed position (FIG. 3) in which the cam 62 is locked by the closing pawl 66, and a disarmed position (FIG. 2) authorizing the release of the driving lever 70 and the relaxation of the closing spring 72.
  • the elastic device 71 for accumulating energy may comprise, depending on the desired stiffness, a single closing spring 72 (FIGS. 2 to 5) or several coaxial springs 72 (FIGS. 6 and 7) of the helical compression type.
  • the springs 72 are arranged on a telescopic link 90 comprising a guide 92 positioned in a housing 74 of the chassis, and a yoke 94 capable of sliding along the guide 92 by cooperating with the finger 76 for transmitting the driving lever.
  • the finger 76 is housed in a notch 104 in the yoke 94.
  • the yoke 94 and the guide 92 are advantageously provided with orifices 96, 98, for the passage of a locking member 100 authorizing the disassembly of the telescopic link 90 relative to the rest of the mechanism.
  • the establishment of the locking member 100 positively locks the telescopic link 90 and maintains the closing springs 72 in the compressed position by preventing their relaxation.
  • the locking member 100 may be formed by a pin, a pin or a screw capable of passing radially through the orifices 96, 98, aligned with the connection 90 when the yoke 94 and the guide 92 are brought closer to the armed position. .
  • the adaptation of the closing springs 72 of the energy storage system 64 is illustrated in FIGS. 6 and 7, and is carried out as follows:
  • the energy storage system 64 is actuated beforehand towards the armed position (FIG. 6) by rotation of the main axis 38 and of the reset cam 62.
  • the closing pawl 66 maintains the cam 62 in this armed position, and the two springs 72 are in the compressed state.
  • the alignment of the orifices 96, 98, of the yoke 94 and of the guide 92 allows the insertion of the blocking member 100 so as to subsequently prevent the spacing of the telescopic link 90.
  • the depressing of the closing button of the mechanism 14 then causes the actuation of the second latch 68 which unlocks the closing pawl 66 to release the reset cam 62.
  • the pivoting of the driving lever 70 around the axis 69 in the opposite direction clockwise causes a break in the mechanical connection between the yoke 94 and the transmission finger 76 of the lever 70 ( Figure 7).
  • the assembly of telescopic link 90 and closing springs 72 of the elastic accumulation device 71 can then be extracted from the mechanism 14.
  • a slight axial clearance 102 remains between the yoke 94 and the guide 92 in the inserted position of the locking member 100 .
  • the presence of the clearance 102 is essential for subsequently authorizing the removal of the locking member 100. This operation is carried out outside by means of a vice or of a special tool which ensures the maximum compression of the springs. 72 until the clearance 102 is taken up. After removal of the locking member 100, the unlocking of the telescopic link 90 allows the progressive relaxation of the springs 72.
  • the disassembly of the two springs 72 allows their exchange by other compression springs having a different hardness or the addition of a third closing spring 72 (shown in dotted lines in FIG. 6).
  • the reassembly operation of the elastic device 71 takes place in the reverse order after maximum compression of the new closing springs 72 and introduction of the locking member 100.
  • the device 71 is replaced in the mechanism 14 by simply positioning the guide 92 in the orifice 74 of the chassis, followed by the arming of the energy storage system 64 (passage from FIG. 7 to FIG. 6) so as to restore the mechanical connection between the yoke 94 and the driving lever 70.
  • the locking member 100 of the telescopic link 90 is finally removed, and the mechanism 14 is ready to order closing of the circuit breaker.
  • the adaptation or replacement of the closing springs 72 of the energy storage system 64 is carried out without dismantling the rest of the mechanism 14. It is possible to customize the control mechanism 14 at the last moment thanks to the choice of the stiffness of the springs which determines the electrodynamic behavior and the intensity of the closing force. Managing the production of a range of circuit breakers fitted with mechanism 14 can thus be facilitated, since the basic devices include a standard mechanism with one or two springs, and it suffices to add an additional spring without dismantling the rest of the mechanism to transform the basic device into a more efficient device (improvement of the electrodynamic resistance and the closing power). The ease of exchanging the closing springs 72 also improves the upkeep and maintenance of the mechanism 14.

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

Description

L'invention est relative à un mécanisme de commande conforme au préambule de la revendication 1.The invention relates to a control mechanism according to the preamble of claim 1.

Le document US-A-3.084.238 fait connaître un mécanisme pour disjoncteur, ayant une liaison téléscopique de compression et de détente d'un ressort de fermeture armé par un dispositif à encliquetage. Le ressort est bloqué dans l'état comprimé par un système de verrouillage, et autorise une fermeture lente des contacts. Le ressort de fermeture reste en permanence en place dans le mécanisme et n'est pas agencé pour être interchangeable.Document US-A-3,084,238 discloses a mechanism for a circuit breaker, having a telescopic connection for compression and expansion of a closing spring armed by a latching device. The spring is blocked in the compressed state by a locking system, and allows a slow closing of the contacts. The closing spring remains permanently in place in the mechanism and is not designed to be interchangeable.

Dans le document FR-A-2.558.986, le mécanisme comporte une came d'armement, dont la libération est provoquée par le déverrouillage d'un cliquet de fermeture. La détente du ressort de fermeture assure la fermeture brusque des contacts, et le réarmement du ressort intervient, soit manuellement au moyen d'un levier d'armement, soit automatiquement par un moteur électrique dès la fermeture du disjoncteur afin d'être prêt pour une nouvelle manoeuvre en cas d'ouverture sur défaut. De tels mécanisme pour disjoncteurs de fortes intensités nécessitent des forces de manoeuvres importantes qui sont tributaires des caractéristiques et performances demandées, notamment tenue électrodynamique, pouvoir de fermeture, etc... Plusieurs types de mécanismes ayant des systèmes accumulateurs à ressorts de fermeture de forces prédéterminées sont alors indispensables pour satisfaire les exigences de fabrication d'une gamme de disjoncteurs comprenant des appareils de base et des appareils de performances différentes. Il en résulte une augmentation du volume de stockage des mécanismes, et des problèmes de gestion et de coût de fabrication.In document FR-A-2,558,986, the mechanism comprises an arming cam, the release of which is caused by the unlocking of a closing pawl. The expansion of the closing spring ensures the abrupt closing of the contacts, and the resetting of the spring takes place, either manually by means of a charging lever, or automatically by an electric motor as soon as the circuit breaker closes in order to be ready for a new operation in the event of opening on fault. Such mechanism for high intensity circuit breakers require significant operating forces which are dependent on the required characteristics and performances, in particular electrodynamic resistance, closing power, etc. Several types of mechanisms having accumulator systems with closing springs of predetermined forces are therefore essential to meet the manufacturing requirements of a range of circuit breakers comprising basic devices and devices of different performance. This results in an increase in the storage volume of the mechanisms, and in management and manufacturing cost problems.

La présente invention consiste à réaliser pour toute la gamme un mécanisme standard ayant un système accumulateur a ressorts adaptables pour le choix de la force de manoeuvre selon le type d'appareils.The present invention consists in producing for the whole range a standard mechanism having an accumulator system with adaptable springs for the choice of the operating force according to the type. of devices.

Le mécanisme de commande selon l'invention est caractérisé en ce que les moyens de commande entraînent la rupture de la chaîne cinématique avec le dispositif à genouillère autorisant le retrait du sous-ensemble formé par la liaison télescopique et le ressort de fermeture dans l'état comprimé.The control mechanism according to the invention is characterized in that the control means cause the kinematic chain to break with the toggle device authorizing the withdrawal of the subassembly formed by the telescopic connection and the closing spring in the state compressed.

Lors du montage du disjoncteur, il suffit d'adapter le ou les ressorts de fermeture au type d'appareil de la gamme. L'adaptation des ressorts intervient, soit par adjonction d'un ressort supplémentaire, soit par simple échange du ou des ressorts du système accumulateur. Cette opération s'effectue facilement sans démontage du mécanisme standard.When mounting the circuit breaker, it suffices to adapt the closing spring or springs to the type of device in the range. The springs are adapted either by adding an additional spring, or by simply replacing the spring or springs of the accumulator system. This is done easily without dismantling the standard mechanism.

La liaison téléscopique comprend un guide positionné dans un logement du châssis, et coopérant à coulissement avec une chape accouplée mécaniquement à la chaîne cinématique lorsque l'organe de blocage est retiré de la liaison téléscopique.The telescopic link comprises a guide positioned in a housing of the chassis, and cooperating slidingly with a yoke mechanically coupled to the kinematic chain when the locking member is removed from the telescopic link.

En fin de course d'armement du ressort de fermeture du système accumulateur d'énergie, l'organe de blocage de la liaison téléscopique peut être introduit dans des orifices alignés de la chape et du guide, de manière à interdire la détente du ressort lors du retrait de la liaison téléscopique.At the end of the arming stroke of the closing spring of the energy storage system, the locking member of the telescopic link can be inserted into aligned holes in the yoke and the guide, so as to prevent the spring from relaxing during withdrawal of the telescopic link.

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:

  • la figure 1 est une vue schématique du dispositif à genouillère du mécanisme, représenté en position d'ouverture des contacts et en position armée du crochet de déclenchement;
  • les figures 2 et 3 montrent des vues schématiques du système accumulateur d'énergie, respectivement en positions désarmée et armée de la came et du ressort de fermeture;
  • la figure 4 représente une vue complète du mécanisme en position d'ouverture des contacts, et dans l'état armé du système accumulateur d'énergie;
  • la figure 5 est une vue identique à celle de la figure 4, en position de fermeture des contacts, et dans l'état désarmé du système accumulateur d'énergie;
  • la figure 6 est une vue identique à celle de la figure 3, avant mise en place de l'organe de blocage de la liaison téléscopique en fin de course d'armement des ressorts de fermeture;
  • la figure 7 est une vue similaire à celle de la figure 2, après mise en place de l'organe de blocage de la liaison téléscopique, et déverrouillage de la came de réarmement par le cliquet de fermeture.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and shown in the appended drawings, in which:
  • Figure 1 is a schematic view of the toggle mechanism device, shown in the open position of the contacts and in the armed position of the trigger hook;
  • Figures 2 and 3 show schematic views of the energy storage system, respectively in the disarmed and armed positions of the cam and the closing spring;
  • FIG. 4 represents a complete view of the mechanism in the open position of the contacts, and in the armed state of the energy storage system;
  • Figure 5 is a view identical to that of Figure 4, in the closed position of the contacts, and in the disarmed state of the energy storage system;
  • Figure 6 is a view identical to that of Figure 3, before implementation of the locking member of the telescopic link at the end of arming stroke of the closing springs;
  • Figure 7 is a view similar to that of Figure 2, after installation of the locking member of the telescopic link, and unlocking of the reset cam by the closing pawl.

Sur les figures 1 à 5, un disjoncteur électrique multipolaire ayant au moins une paire de contacts 10, 12, séparables par pôle, est actionné par un mécanisme 14 de commande porté par un châssis à flasques 15 parallèles et comprenant un dispositif à genouillère 16 associé à un crochet de déclenchement 18.In FIGS. 1 to 5, a multipolar electric circuit breaker having at least one pair of contacts 10, 12, separable by pole, is actuated by a control mechanism 14 carried by a chassis with parallel flanges 15 and comprising a toggle joint device 16 associated to a trigger hook 18.

Le dispositif à genouillère 16 (figure 1) comporte une paire de biellettes 20, 22, articulées sur un axe de pivotement 24, la biellette inférieure 20 de transmission étant accouplée mécaniquement à un barreau 23 transversal de commutation, commun à l'ensemble des pôles. Le barreau 23 est constitué par un arbre 26 monté à rotation entre une position d'ouverture et une position de fermeture des contacts 10, 12. Au niveau de chaque pôle est agencée une tringle 30 de liaison (figures 4 et 5) qui relie une manivelle du barreau 23 à une cage 28 isolante de support du contact mobile 12. Ce dernier est connecté à une plage 32 de raccordement par un conducteur souple 34, notamment une tresse. Un ressort 36 de pression de contact est agencé entre la cage 28 et la face supérieure de chaque contact mobile 12.The toggle joint device 16 (FIG. 1) comprises a pair of rods 20, 22, articulated on a pivot axis 24, the lower link rod 20 for transmission being mechanically coupled to a transverse switching rod 23, common to all of the poles . The bar 23 is constituted by a shaft 26 rotatably mounted between an open position and a closed position of the contacts 10, 12. At each pole is arranged a connecting rod 30 (Figures 4 and 5) which connects a crank of the bar 23 to an insulating cage 28 for supporting the movable contact 12. The latter is connected to a connection pad 32 by a flexible conductor 34, in particular a braid. A contact pressure spring 36 is arranged between the cage 28 and the upper face of each movable contact 12.

Le crochet de déclenchement 18 est monté à pivotement sur un axe 38 principal fixe entre une position armée (figure 1) et une position déclenchée. Un ressort d'ouverture 40 est ancré entre un ergot 42 du barreau 23 et un taquet 44 fixe de retenue disposé au-dessus du dispositif à genouillère 16. Un cliquet d'ouverture 46, formé par un levier de verrouillage monté à pivotement sur un axe 48, est piloté par un premier verrou d'accrochage 50 en forme de demi-lune. Un ressort 52 de rappel du cliquet d'ouverture 46 se trouve à l'opposé du premier verrou 50 par rapport à l'axe 48. Une butée 54 ménagée sur le cliquet d'ouverture 46 entre l'axe 48 et le verrou 50, coopère en position armée avec un évidement 56 en V du crochet de déclenchement 18. La biellette supérieure 22 de la genouillère 16 est articulée sur un axe 58 du crochet de déclenchement 18 à l'opposé de l'évidement 56. Un ressort de rappel 60 fixé entre l'axe 58 et le taquet 44, sollicite le crochet 18 dans le sens trigonométrique vers la position armée (figure 1), dans laquelle la butée 54 du cliquet d'ouverture 46 est positionnée dans l'évidement 56 en V du crochet 18.The trigger hook 18 is pivotally mounted on a main axis 38 fixed between an armed position (Figure 1) and a triggered position. An opening spring 40 is anchored between a lug 42 of the bar 23 and a fixed retaining cleat 44 disposed above the toggle device 16. An opening pawl 46, formed by a locking lever pivotally mounted on a axis 48, is controlled by a first latch 50 in the shape of a half-moon. A spring 52 for returning the opening pawl 46 is located opposite the first latch 50 relative to the axis 48. A stop 54 formed on the opening pawl 46 between the axis 48 and the latch 50, cooperates in the armed position with a V-shaped recess 56 in the trigger hook 18. The upper link 22 of the toggle joint 16 is articulated on an axis 58 of the trigger hook 18 opposite the recess 56. A return spring 60 fixed between the axis 58 and the cleat 44, urges the hook 18 in the counterclockwise direction towards the armed position (FIG. 1), in which the stop 54 of the opening pawl 46 is positioned in the V-shaped recess 56 in the hook 18.

Le mécanisme 14 comporte une came de réarmement 62 clavetée sur l'axe principal 38 du crochet 18, et coopérant avec un système accumulateur d'énergie 64, montré en détail aux figures 2 et 3.The mechanism 14 comprises a reset cam 62 keyed to the main axis 38 of the hook 18, and cooperating with an energy storage system 64, shown in detail in FIGS. 2 and 3.

En plus de la came de réarmement 62, le système accumulateur 64 d'énergie est équipé d'un cliquet de fermeture 66 piloté par un deuxième verrou d'accrochage 68, et d'un levier entraîneur 70 monté à pivotement sur un axe 69. Un dispositif élastique d'accumulation d'énergie 71 comprenant au moins un ressort de fermeture 72, est agencé entre un logement 74 du châssis et un doigt 76 de transmission du levier entraîneur 70. La came de réarmement 62 coopère avec un galet 78 du levier entraîneur 70, et le ressort de fermeture 72 sollicite ce dernier en appui de la came 62. Le profil de la came 62 comporte un premier secteur 80 d'armement du ressort de fermeture 72, et un deuxième secteur 82 correspondant à la libération du galet 78 autorisant un pivotement brusque du levier entraîneur 70 dans le sens inverse des aiguilles d'une montre sous l'action du ressort de fermeture 72 (passage de la figure 3 à la figure 2). La came de réarmement 62 est dotée d'autre part d'un ergot 84 susceptible de venir en butée du cliquet de fermeture 66 lorsque l'extrémité du premier secteur 80 de la came 62 se trouve en appui sur le galet 78 du levier entraîneur 70.In addition to the reset cam 62, the energy storage system 64 is equipped with a closing pawl 66 controlled by a second latch 68, and a driving lever 70 pivotally mounted on an axis 69. An elastic energy storage device 71 comprising at least one closing spring 72 is arranged between a housing 74 of the chassis and a finger 76 for transmitting the driving lever 70. The reset cam 62 cooperates with a roller 78 of the lever driver 70, and the closing spring 72 urges the latter to bear on the cam 62. The profile of the cam 62 comprises a first sector 80 for arming the closing spring 72, and a second sector 82 corresponding to the release of the roller 78 authorizing a sudden pivoting of the driving lever 70 anticlockwise under the action of the closing spring 72 (passage from FIG. 3 to FIG. 2). The reset cam 62 is also provided with a lug 84 capable of coming into abutment with the closing pawl 66 when the end of the first sector 80 of the cam 62 is in contact with the roller 78 of the driving lever 70 .

Dans la position stable de la figure 3, le ressort de fermeture 72 du système accumulateur 64 est armé, et les contacts 10, 12, se trouvent, soit en position d'ouverture, soit en position de fermeture selon l'état du dispositif à genouillère 16 de la figure 1. Le galet 78 en appui sur le premier secteur 80 exerce un couple sur la came de réarmement 62 sollicitant cette dernière en rotation dans le sens des aiguilles d'une montre. Le cliquet de fermeture 66 s'oppose à cette rotation grâce à la retenue de l'ergot 84 de la came 62.In the stable position of FIG. 3, the closing spring 72 of the accumulator system 64 is armed, and the contacts 10, 12, are either in the open position or in the closed position depending on the state of the device to be toggle switch 16 of FIG. 1. The roller 78 bearing on the first sector 80 exerts a torque on the reset cam 62 urging the latter in clockwise rotation. The closing pawl 66 opposes this rotation by virtue of the retention of the lug 84 of the cam 62.

Le mécanisme 14 coopère avec un déclencheur magnétothermique ou électronique (non représenté ) pour provoquer l'ouverture automatique des contacts 10, 12, en cas de surcharge ou de défaut. Après ouverture des contacts 10, 12 par le dispositif à genouillère 16 (figures 1 et 4), une manoeuvre de fermeture peut être commandée par actionnement du deuxième verrou 68 provoquant le pivotement du cliquet de fermeture 66 autour de son axe 88 dans le sens inverse des aiguilles d'une montre (figure 2). Il en résulte une libération de l'ergot 84 provoquant sous l'action du galet 78 un pivotement de la came 62 dans le sens des aiguilles d'une montre amenant le deuxième secteur 82 de la came 62 en position de libération du levier entraîneur 70. Ce dernier est alors entraîné dans le sens inverse des aiguilles d'une montre par la détente du ressort de fermeture 72 de manière à transmettre une force de fermeture au dispositif à genouillère 16 déplaçant les contacts 10, 12 en position de fermeture (figure 5). Cette manoeuvre de fermeture s'opère à l'encontre de la force du ressort d'ouverture 40, lequel est ainsi automatiquement armé lors de la détente du ressort de fermeture 72.The mechanism 14 cooperates with a magnetothermal or electronic trip device (not shown) to cause the automatic opening of the contacts 10, 12, in the event of an overload or a fault. After opening the contacts 10, 12 by the toggle joint device 16 (FIGS. 1 and 4), a closing operation can be controlled by actuation of the second latch 68 causing the closing pawl 66 to pivot about its axis 88 in the opposite direction. clockwise (Figure 2). This results in a release of the lug 84 causing under the action of the roller 78 a pivoting of the cam 62 in a clockwise direction bringing the second sector 82 of the cam 62 in the release position of the driving lever 70 The latter is then driven anti-clockwise by the detent of the closing spring 72 so as to transmit a closing force to the toggle joint device 16 moving the contacts 10, 12 to the closed position (FIG. 5 ). This closing maneuver takes place against the force of the opening spring 40, which is thus automatically armed when the closing spring 72 is released.

Le réarmement du système accumulateur 64 par compression du ressort de fermeture 72 s'effectue manuellement ou automatiquement au moyen d'un levier de manoeuvre ou d'un motoréducteur (non représentés) calés sur l'axe principal 38. Cette opération de réarmement du ressort de fermeture 72 par rotation de la came 62 est expliquée en détail dans la demande de brevet français N° 2 558 986 de la demanderesse. L'entraînement en rotation de l'axe principal 38 s'effectue dans le sens des aiguilles d'une montre jusqu'à la venue en butée de l'ergot 84 de la came 62 sur le cliquet de fermeture 66. La came de réarmement 62 tourne avec l'axe principal 38 dans le même sens de rotation, et occupe deux positions stables, à savoir une position armée (figure 3) dans laquelle la came 62 est verrouillée par le cliquet de fermeture 66, et une position désarmée (figure 2) autorisant la libération du levier entraîneur 70 et la détente du ressort de fermeture 72.The rearming of the accumulator system 64 by compression of the closing spring 72 is carried out manually or automatically by means of an operating lever or a geared motor (not shown) fixed on the main axis 38. This spring rearming operation closure 72 by rotation of the cam 62 is explained in detail in French patent application No. 2,558,986 of the applicant. The main axis 38 is rotated in a clockwise direction until the lug 84 of the cam 62 comes into abutment on the closing pawl 66. The reset cam 62 rotates with the main axis 38 in the same direction of rotation, and occupies two stable positions, namely an armed position (FIG. 3) in which the cam 62 is locked by the closing pawl 66, and a disarmed position (FIG. 2) authorizing the release of the driving lever 70 and the relaxation of the closing spring 72.

Le dispositif élastique 71 d'accumulation d'énergie peut comporter, en fonction de la raideur désirée, un seul ressort de fermeture 72 (figures 2 à 5) ou plusieurs ressorts 72 coaxiaux (figures 6 et 7) du type hélicoïdal à compression. Les ressorts 72 sont agencés sur une liaison téléscopique 90 comportant un guide 92 positionné dans un logement 74 du châssis, et une chape 94 susceptible de coulisser le long du guide 92 en coopérant avec le doigt 76 de transmission du levier entraîneur. En fonctionnement normal du mécanisme 14 le doigt 76 est logé dans une encoche 104 de la chape 94.The elastic device 71 for accumulating energy may comprise, depending on the desired stiffness, a single closing spring 72 (FIGS. 2 to 5) or several coaxial springs 72 (FIGS. 6 and 7) of the helical compression type. The springs 72 are arranged on a telescopic link 90 comprising a guide 92 positioned in a housing 74 of the chassis, and a yoke 94 capable of sliding along the guide 92 by cooperating with the finger 76 for transmitting the driving lever. In normal operation of the mechanism 14, the finger 76 is housed in a notch 104 in the yoke 94.

La chape 94 et le guide 92 sont avantageusement dotés d'orifices 96, 98, pour le passage d'un organe de blocage 100 autorisant le démontage de la liaison téléscopique 90 par rapport au reste du mécanisme.The yoke 94 and the guide 92 are advantageously provided with orifices 96, 98, for the passage of a locking member 100 authorizing the disassembly of the telescopic link 90 relative to the rest of the mechanism.

La mise en place de l'organe de blocage 100 verrouille positivement la liaison téléscopique 90 et maintient les ressorts de fermetures 72 en position comprimée en interdisant leur détente. L'organe de blocage 100 peut être formé par une goupille, une broche ou une vis susceptible de traverser radialement les orifices 96, 98, alignés de la liaison 90 lors du rapprochement de la chape 94 et du guide 92 au voisinage de la position armée.The establishment of the locking member 100 positively locks the telescopic link 90 and maintains the closing springs 72 in the compressed position by preventing their relaxation. The locking member 100 may be formed by a pin, a pin or a screw capable of passing radially through the orifices 96, 98, aligned with the connection 90 when the yoke 94 and the guide 92 are brought closer to the armed position. .

L'adaptation des ressorts de fermeture 72 du système accumulateur d'énergie 64 est illustrée sur les figures 6 et 7, et s'effectue de la manière suivante:
Le système accumulateur d'énergie 64 est actionné préalablement vers la position armée (figure 6) par rotation de l'axe principal 38 et de la came de réarmement 62. Le cliquet de fermeture 66 maintient la came 62 dans cette position armée, et les deux ressorts 72 se trouvent dans l'état comprimé. L'alignement des orifices 96,98, de la chape 94 et du guide 92 autorise l'insertion de l'organe de blocage 100 de manière à interdire par la suite l'écartement de la liaison téléscopique 90.The adaptation of the closing springs 72 of the energy storage system 64 is illustrated in FIGS. 6 and 7, and is carried out as follows:
The energy storage system 64 is actuated beforehand towards the armed position (FIG. 6) by rotation of the main axis 38 and of the reset cam 62. The closing pawl 66 maintains the cam 62 in this armed position, and the two springs 72 are in the compressed state. The alignment of the orifices 96, 98, of the yoke 94 and of the guide 92 allows the insertion of the blocking member 100 so as to subsequently prevent the spacing of the telescopic link 90.

L'enfoncement du bouton de fermeture du mécanisme 14 provoque ensuite l'actionnement du deuxième verrou 68 qui déverrouille le cliquet de fermeture 66 de libère la came de réarmement 62. Le pivotement du levier entraîneur 70 autour de l'axe 69 dans le sens inverse des aiguilles d'une montre provoque une rupture de la liaison mécanique entre la chape 94 et le doigt 76 de transmission du levier 70 (figure 7). L'ensemble liaison téléscopique 90 et ressorts de fermeture 72 du dispositif élastique d'accumulation 71 peut alors être extrait du mécanisme 14. Un faible jeu 102 axial subsiste entre la chape 94 et le guide 92 en position insérée de l'organe de blocage 100.The depressing of the closing button of the mechanism 14 then causes the actuation of the second latch 68 which unlocks the closing pawl 66 to release the reset cam 62. The pivoting of the driving lever 70 around the axis 69 in the opposite direction clockwise causes a break in the mechanical connection between the yoke 94 and the transmission finger 76 of the lever 70 (Figure 7). The assembly of telescopic link 90 and closing springs 72 of the elastic accumulation device 71 can then be extracted from the mechanism 14. A slight axial clearance 102 remains between the yoke 94 and the guide 92 in the inserted position of the locking member 100 .

La présence du jeu 102 est indispensable pour autoriser par la suite l'enlèvement de l'organe de blocage 100. Cette opération est effectuée à l'extérieur au moyen d'un étau ou d'un outillage spécial qui assure la compression maximum des ressorts 72 jusqu'au rattrapage du jeu 102. Après retrait de l'organe de blocage 100, le déverrouillage de la liaison téléscopique 90 permet la détente progressive des ressorts 72. Le démontage des deux ressorts 72 autorise leur échange par d'autres ressorts de compression ayant une dureté différente ou l'adjonction d'un troisième ressort de fermeture 72 (montré en pointillé sur la figure 6).The presence of the clearance 102 is essential for subsequently authorizing the removal of the locking member 100. This operation is carried out outside by means of a vice or of a special tool which ensures the maximum compression of the springs. 72 until the clearance 102 is taken up. After removal of the locking member 100, the unlocking of the telescopic link 90 allows the progressive relaxation of the springs 72. The disassembly of the two springs 72 allows their exchange by other compression springs having a different hardness or the addition of a third closing spring 72 (shown in dotted lines in FIG. 6).

L'opération de remontage du dispositif élastique 71 s'opère dans l'ordre inverse après compression maximum des nouveaux ressorts de fermeture 72 et introduction de l'organe de blocage 100. La remise en place du dispositif 71 dans le mécanisme 14 s'effectue par simple positionnement du guide 92 dans l'orifice 74 du châssis, suivi de l'armement du système accumulateur d'énergie 64 (pasage de la figure 7 à la figure 6) de manière à rétablir la liaison mécanique entre la chape 94 et le levier entraîneur 70. L'organe de blocage 100 de la liaison téléscopique 90 est finalement retiré, et le mécanisme 14 est prêt pour commander une fermeture du disjoncteur.The reassembly operation of the elastic device 71 takes place in the reverse order after maximum compression of the new closing springs 72 and introduction of the locking member 100. The device 71 is replaced in the mechanism 14 by simply positioning the guide 92 in the orifice 74 of the chassis, followed by the arming of the energy storage system 64 (passage from FIG. 7 to FIG. 6) so as to restore the mechanical connection between the yoke 94 and the driving lever 70. The locking member 100 of the telescopic link 90 is finally removed, and the mechanism 14 is ready to order closing of the circuit breaker.

L'adaptation ou le remplacement des ressorts de fermeture 72 du système accumulateur d'énergie 64 s'effectue sans démontage du reste du mécanisme 14. Il est possible de personnaliser le mécanisme 14 de commande au dernier moment grâce au choix de la raideur des ressorts qui détermine la tenue électrodynamique et l'intensité de la force de fermeture. La gestion de la fabrication d'une gamme de disjoncteurs équipés du mécanisme 14 peut ainsi être facitlitée, étant donné que les appareils de base comportent un mécanisme standard à un ou deux ressorts, et qu'il suffit d'adjoindre un ressort supplémentaire sans démonter le reste du mécanisme pour transformer l'appareil de base en un appareil plus performant (amélioration de la tenue électrodynamique et du pouvoir de fermeture). La facilité d'échange des ressorts de fermeture 72 améliore d'autre part l'entretien et la maintenance du mécanisme 14.The adaptation or replacement of the closing springs 72 of the energy storage system 64 is carried out without dismantling the rest of the mechanism 14. It is possible to customize the control mechanism 14 at the last moment thanks to the choice of the stiffness of the springs which determines the electrodynamic behavior and the intensity of the closing force. Managing the production of a range of circuit breakers fitted with mechanism 14 can thus be facilitated, since the basic devices include a standard mechanism with one or two springs, and it suffices to add an additional spring without dismantling the rest of the mechanism to transform the basic device into a more efficient device (improvement of the electrodynamic resistance and the closing power). The ease of exchanging the closing springs 72 also improves the upkeep and maintenance of the mechanism 14.

Claims (8)

  1. An operating mechanism for a high-rating multipole electrical circuit breaker having a pair of separable contacts (10, 12) per pole, and comprising :
    - a toggle device (16) associated with a tripping hook (18) and opening spring (40) to move the movable contact (12) to the open position, loading of the opening spring (40) being performed automatically when the closing operation takes place,
    - an energy storing system (64) with flexible device (71) comprising at least one closing spring (72) to move the movable contact (12) to the closed position, and a telescopic link (90) having two component parts with relative movement between which said closing spring (72) is inserted,
    - a manual actuating lever and/or electric motor cooperating with operating means (62, 66) for loading the closing spring (72),
    - and a kinematic transmission chain arranged between the energy storing system (64) and the toggle device (16), the energy storing system (64) comprising a removable blocking part (100) able to lock said telescopic link (90) when the two components for compressing the spring (72) are moved towards one another at the end of the loading travel, characterized in that said operating means cause the kinematic chain with the toggle device (16) to be broken to enable the sub-assembly formed by the telescopic link (90) and closing spring (72) to be removed in the compressed state.
  2. The circuit breaker operating mechanism according to claim 1, characterized in that the telescopic link (90) comprises a guide (92) positioned in a housing (74) of the frame, and cooperating with sliding with a cap (94) mechanically coupled to the kinematic chain when the blocking part (100) is removed from the telescopic link (90).
  3. The circuit breaker operating mechanism according to claim 1, characterized in that the two components of the telescopic link (90) are provided with orifices (96, 98) able to be aligned at the end of loading travel to enable the blocking part (100) to pass through.
  4. The circuit breaker operating mechanism according to claim 1, comprising a closing spring of the helical compression type, characterized in that the blocking part (100) of the telescopic link (90) is formed by a gudgeon pin or a spigot extending transversely with respect to the axial direction of the closing spring (72).
  5. The circuit breaker operating mechanism according to claim 3, characterized in that an axial clearance (102) of small thickness is arranged between the two components of the telescopic link (90) after said blocking part (100) has been inserted in the orifices (96, 98).
  6. The circuit breaker operating mechanism according to claim 2, characterized in that the kinematic transmission chain between the energy storing system (64) and toggle device (16) comprises a drive lever (70) equipped with a transmission finger (76) eccentric with respect to the pivoting spindle (69) of the lever (70), and that said finger (76) cooperates with a notch (104) of the cap (94) to form a mechanical link able to break said kinematic chain after said blocking part (100) has been fitted.
  7. The operating mechanism according to claim 1, characterized in that a plurality of helical closing springs (72) of different diameters are arranged coaxially on said telescopic link (90).
  8. The operating mechanism according to one of the claims 1 to 7, characterized in that the operating means comprise a resetting cam (62) driven in rotation by the manual actuating lever and/or motor, and cooperating with a roller (78) of the drive lever (70), and that a closing ratchet (66) operated by a bolt (68) can occupy a first position latching the cam (62) in the loaded state, and a second position unlatching the cam (62) to relax the closing spring.
EP86402268A 1985-10-31 1986-10-13 Operating mechanism for a circuit breaker provided with an energy storing device Expired - Lifetime EP0222645B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8516347 1985-10-31
FR8516347A FR2589626B1 (en) 1985-10-31 1985-10-31 CONTROL MECHANISM OF A CIRCUIT BREAKER EQUIPPED WITH AN ENERGY ACCUMULATING SYSTEM

Publications (2)

Publication Number Publication Date
EP0222645A1 EP0222645A1 (en) 1987-05-20
EP0222645B1 true EP0222645B1 (en) 1994-03-02

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EP (1) EP0222645B1 (en)
JP (1) JPH071656B2 (en)
CN (1) CN1005878B (en)
CA (1) CA1289179C (en)
DE (1) DE3689683T2 (en)
FR (1) FR2589626B1 (en)
HK (1) HK41795A (en)
IN (1) IN167258B (en)
ZA (1) ZA868062B (en)

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CA1091732A (en) * 1976-04-28 1980-12-16 Westinghouse Electric Corporation Circuit breaker apparatus including jack shaft support
US4137436A (en) * 1976-07-21 1979-01-30 General Electric Company Means for manually slow-closing a circuit breaker that has a spring-actuated operating device
JPS57154739A (en) * 1981-03-19 1982-09-24 Tokyo Shibaura Electric Co Device for operating circuit breaker
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FR2558986B1 (en) * 1984-01-30 1986-11-21 Merlin Gerin DEVICE FOR CONTROLLING AN ELECTRIC CIRCUIT BREAKER

Also Published As

Publication number Publication date
FR2589626A1 (en) 1987-05-07
CA1289179C (en) 1991-09-17
ZA868062B (en) 1987-06-24
IN167258B (en) 1990-09-29
HK41795A (en) 1995-03-31
CN1005878B (en) 1989-11-22
DE3689683D1 (en) 1994-04-07
US4713508A (en) 1987-12-15
CN86107510A (en) 1987-04-29
DE3689683T2 (en) 1994-08-04
FR2589626B1 (en) 1989-03-03
EP0222645A1 (en) 1987-05-20
JPH071656B2 (en) 1995-01-11
JPS62105321A (en) 1987-05-15

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