EP0696039B1 - Circuit breaker mechanism provided with an energy accumulator with a damping stop - Google Patents

Circuit breaker mechanism provided with an energy accumulator with a damping stop Download PDF

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Publication number
EP0696039B1
EP0696039B1 EP95410068A EP95410068A EP0696039B1 EP 0696039 B1 EP0696039 B1 EP 0696039B1 EP 95410068 A EP95410068 A EP 95410068A EP 95410068 A EP95410068 A EP 95410068A EP 0696039 B1 EP0696039 B1 EP 0696039B1
Authority
EP
European Patent Office
Prior art keywords
cap
spring
circuit breaker
telescopic link
guide
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
EP95410068A
Other languages
German (de)
French (fr)
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EP0696039A1 (en
Inventor
Pierre Latapie
Pierre Baginski
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Schneider Electric SE
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Schneider Electric SE
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Filing date
Publication date
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0696039A1 publication Critical patent/EP0696039A1/en
Application granted granted Critical
Publication of EP0696039B1 publication Critical patent/EP0696039B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • 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
    • 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
    • H01H3/3005—Charging means
    • H01H3/3015—Charging means using cam devices

Definitions

  • Document DE-A-2603536 relates to a drive mechanism for a circuit breaker medium voltage, in which a closing spring is supported on a shaped support mobile piston coupled by a transmission rod to a control crank.
  • the piston moves inside a cylinder to constitute a pneumatic dashpot to air compression intended to generate a progressive braking force during the closing of the circuit breaker.
  • the dashpot is arranged outside the closing spring, which increases the axial size in the direction of the rebound of the spring. Braking force exists from the start of the relaxation of the spring 16.
  • the object of the invention is to improve the mechanical endurance of a energy storage circuit breaker control.
  • the telescopic link comprises a yoke in connection with the driving lever, and cooperating slidingly with a guide, and a slide arranged in an intermediate drawer between the guide and the yoke, said slide being equipped with a retaining rim intended to interfere with a conjugate shoulder of the yoke to form said damping stop.
  • the main compression spring is inserted between a bearing surface of the yoke, and a slide base, said base being located opposite the rim.
  • An auxiliary spring polarization is interposed coaxially inside the slide between the guide, and a longitudinal extension of the screed.
  • a multipolar electric circuit breaker having at least one pair of contacts 10, 12, separable by pole, is actuated by a mechanism 14 of control carried by a chassis with parallel flanges 15 and comprising a toggle joint device 16 associated with a trigger hook 18.
  • the toggle joint device 16 comprises a pair of links 20, 22 articulated on an axis pivot 24, the lower link 20 of transmission being mechanically coupled to a transverse switching rod 23, common to all of the poles.
  • the bar 23 consists of a shaft 26 rotatably mounted between an open position and a position for closing the contacts 10, 12.
  • At each pole there is a rod 30 of link which connects a crank of the bar 23 to an insulating cage 28 for supporting the contact mobile 12.
  • the latter is connected to a connection pad 32 by a conductor flexible 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 an axis 48, is controlled by a first latch 50 half moon shape.
  • a spring 52 for returning the opening pawl 46 is located opposite of the first lock 50 relative to the axis 48.
  • a stop 54 formed on the pawl 46 between the axis 48 and the latch 50, cooperates in the armed position with a recess 56 in V of 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 includes a reset cam 62 keyed to the main axis 38 of the hook 18, and cooperating with an energy storage system 64.
  • the energy storage system 64 is equipped a closing pawl 66 controlled by a second latch 68, and a lever driver 70 pivotally mounted on an axis 69.
  • An elastic accumulation device of energy 71 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 coach 70, and the elastic device 71 for accumulating energy biases the latter in support of the cam 62.
  • the profile of the cam 62 comprises a first arming sector 80 of 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 in the opposite direction of clockwise under the detent action of the elastic device 71.
  • the cam resetting 62 is also provided with a lug 84 capable of coming into abutment with the pawl closing 66 when the end of the first sector 80 of the cam 62 is in abutment on the roller 78 of the driving lever 70.
  • the contacts 10, 12 are either in the open position or in the closed position, according to the state of the toggle joint device 16.
  • the roller 78 rests on the first sector 80 exerts a torque on the reset cam 62 urging the latter to rotate in the clockwise.
  • the closing pawl 66 opposes this rotation thanks to 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 overload or 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 counterclockwise. This results in a release of the lug 84 causing under the action of the roller 78 a pivoting of the cam 62 clockwise watch bringing the second sector 82 of the cam 62 into the lever release position trainer 70.
  • the latter is then driven counterclockwise by the relaxation of the elastic device 71 so as to transmit a closing force to the toggle device 16 moving the contacts 10, 12 to the closed position ( Figure 3). This closing maneuver takes place against the force of the opening spring 40, which is thus automatically armed when the elastic device 71 is released.
  • the reset cam 62 rotates with the main axis 38 in the same direction of rotation, and occupies two stable positions, at know an armed position ( Figure 1) in which the cam 62 is locked by the pawl 66, and a disarmed position ( Figure 3) authorizing the release of the lever coach 70 and the relaxation of the elastic device 71.
  • the elastic device 71 of the energy accumulator system 64 for the closing of the contacts 10, 12 of the circuit breaker comprises a telescopic connection 90 in which is integrated with a damping stop 91.
  • the telescopic link 90 is equipped a guide 92 positioned in the housing 74 of the chassis, and a yoke 94 capable of slide along the guide 92, and comprising a housing for housing the finger 76 of the lever coach 70.
  • a slide 100 in the form of an intermediate drawer is interposed between the guide 92 and the yoke 94, and has an annular flange 102 cooperating with a shoulder 104 conjugate located on a longitudinal extension 105 of the yoke 94 to form the stop depreciation 91.
  • a main compression spring 106 is inserted between the yoke 94, and a base 108 external of the slide 100, which base is located opposite the flange 102.
  • a spring polarization auxiliary 110 is arranged coaxially inside the slide 100 in bearing on the guide 92 and the shoulder 104 of the longitudinal extension 105 of the yoke 94. The stiffness of the auxiliary spring 110 is less than that of the main spring 106.
  • the reset cam 62 is locked in the armed position by the closing pawl 66, and the two springs 106, 110 are compressed at most by the relative approximation of the yoke 94 by relative to the guide 92.
  • the edge 102 of the slide 100 is separated longitudinally from the shoulder 104 of the yoke 94 by a predetermined distance 112.
  • the relaxation of the main spring 106 causes the driving lever 70 to pivot around axis 69 counterclockwise.
  • the driving lever 70 acts on the upper link 22 so as to drive the toggle joint device 16 to a intermediate position corresponding to exceeding the closing dead center.
  • the system accumulator 64 is then in the position of FIG. 2, in which the shoulder 104 of the yoke 94 comes into engagement against the rim 102 of the slide 100, so to constitute the damping stop 91 intended to absorb the excess energy of the spring 106, before the driving lever 70 comes into contact with the fixed stud 114.
  • this damping stop 91 results from the elasticity of the steel parts, which could be reinforced by means of an elastic ring (not shown), arranged either on the shoulder 104, ie on the rim 102.
  • the elastic ring could of course be replaced by any other absorption interface.
  • the control energy required for closing the contacts 10, 12 of the circuit breaker is presented by curve A, which extends between the open position O of the contacts, and the intermediate point PMF for passage of the closing dead center.
  • the curve B illustrates, the closing energy of a conventional mechanism, for the total stroke 11 of the driving lever 70, in particular that described in document EP-A-222 645.
  • the curve C reflects the closing energy of the mechanism according to the invention, thanks to the presence of the damping stop 91 inside the telescopic link 90, making it possible to absorb the excess energy after the PMF product from the neutral point of closure. Race 12 is less than the stroke 11, which improves the endurance of the mechanism 14.
  • damping stop 91 also authorizes the increase in the number circuit breaker no-load starts. Certain standards indeed impose the disarmament of the energy storage mechanism when the circuit breaker is withdrawn, independently the open or closed position of the contacts.
  • a disarm lever (not shown) is made active during the circuit-breaker drawout stroke to act on the latch hooking 68 so as to unlock the closing pawl 66 driving automatically the rebound of the springs 106, 110.
  • the energy storage system 64 with stop 91 can be integrated, either directly in the mechanism 14 of a one-piece circuit breaker, either in a coupled remote control unit mechanically at the circuit breaker block.
  • the reset cam 62 can be replaced by any other control means for closing the closing spring.

Description

L'invention est relative à un mécanisme de commande pour un disjoncteur électrique multipolaire, ayant une paire de contacts séparables par pôle, et comprenant :

  • un crochet de déclenchement associé à un dispositif à genouillère, comprenant une première biellette articulée entre un barreau de commutation, et une deuxième biellette,
  • un système accumulateur d'énergie ayant une liaison téléscopique formée par une chape coopérant à coulissement avec un guide avec interposition d'un dispositif élastique ayant au moins un ressort principal de fermeture,
  • un levier entraíneur en liaison avec la chape et agencé entre le système accumulateur d'énergie et la deuxième biellette du dispositif à genouillère,
  • et des moyens de commande pour assurer le passage de la liaison téléscopique de la position armée vers la position désarmée, et vice-versa.
The invention relates to a control mechanism for a multi-pole electric circuit breaker, having a pair of contacts separable by pole, and comprising:
  • a trigger hook associated with a toggle joint device, comprising a first link articulated between a switching bar, and a second link,
  • an energy storage system having a telescopic link formed by a yoke slidingly cooperating with a guide with the interposition of an elastic device having at least one main closing spring,
  • a driving lever in connection with the yoke and arranged between the energy storage system and the second link of the toggle joint device,
  • and control means for ensuring the passage of the telescopic link from the armed position to the disarmed position, and vice versa.

Un tel mécanisme est décrit dans le document EP-A 222 645. L'excédent d'énergie de commande après le point mort fermeture de la genouillère du mécanisme, est encaissé directement par la butée fixe de limitation de la course de pivotement du levier entraíneur. Il peut en résulter une usure prématurée du mécanisme, notamment dans certaines conditions de départs à vide suite à des débrochages répétés du disjoncteur.Such a mechanism is described in document EP-A 222 645. The excess energy of command after neutral close of the mechanism toggle, is cashed directly by the fixed stop limiting the pivoting stroke of the driving lever. he may result in premature wear of the mechanism, in particular under certain conditions of No-load starts following repeated withdrawals from the circuit breaker.

Le document DE-A-2603536 se rapporte à un mécanisme d'entraínement pour un disjoncteur à moyenne tension, dans lequel un ressort de fermeture prend appui sur un support en forme de piston mobile accouplé par une tige de transmission à une manivelle de commande. Le piston se déplace à l'intérieur d'un cylindre pour constituer un dashpot pneumatique à compression d'air destiné à engendrer une force de freinage progressive lors de la phase de fermeture du disjoncteur. Le dashpot est agencé à l'extérieur du ressort de fermeture, ce qui augmente l'encombrement axial dans la direction de la détente du ressort. La force de freinage existe dès le début de la détente du ressort 16.Document DE-A-2603536 relates to a drive mechanism for a circuit breaker medium voltage, in which a closing spring is supported on a shaped support mobile piston coupled by a transmission rod to a control crank. The piston moves inside a cylinder to constitute a pneumatic dashpot to air compression intended to generate a progressive braking force during the closing of the circuit breaker. The dashpot is arranged outside the closing spring, which increases the axial size in the direction of the rebound of the spring. Braking force exists from the start of the relaxation of the spring 16.

L'objet de l'invention consiste à améliorer l'endurance mécanique d'un mécanisme de commande de disjoncteur à accumulation d'énergie.The object of the invention is to improve the mechanical endurance of a energy storage circuit breaker control.

Le mécanisme selon l'invention est caractérisé en ce que

  • la liaison télescopique comporte un coulisseau agencé en tiroir intermédiaire entre le guide et la chape, et comprenant un rebord de retenue destiné à interférer avec un épaulement conjugué de la chape pour former une butée d'amortissement intégrée dans la liaison téléscopique, et destinée à absorber l'excédent d'énergie du ressort principal de fermeture après dépassement du point mort de fermeture du dispositif à genouillère, et avant la fin de course du levier entraíneur,
  • et un ressort auxiliaire de polarisation se trouve intercalé coaxialement à l'intérieur du coulisseau entre le guide et l'épaulement de la chape.
The mechanism according to the invention is characterized in that
  • the telescopic link comprises a slide arranged in an intermediate drawer between the guide and the yoke, and comprising a retaining edge intended to interfere with a conjugate shoulder of the yoke to form a damping stop integrated in the telescopic link, and intended to absorb the excess energy of the main closing spring after passing the closing dead center of the toggle joint device, and before the end of travel of the driving lever,
  • and an auxiliary biasing spring is interposed coaxially inside the slide between the guide and the shoulder of the yoke.

Les chocs mécaniques occasionnés suite à l'excédent d'énergie au cours d'une phase de désarmement sont ainsi reportés au niveau de la butée d'amortissement. L'effet d'amortissement de la butée intégrée résulte de l'élasticité des pièces en acier. L'amortissement peut être adapté en prévoyant tout autre interface d'absorption au niveau de la zone d'impact des pièces en contact.Mechanical shocks caused by excess energy during a phase of disarmament are thus carried over to the damping stop. The effect damping of the integrated stop results from the elasticity of the steel parts. Depreciation can be adapted by providing any other absorption interface at the level of the impact zone parts in contact.

Selon un mode de réalisation de l'invention, la liaison télescopique comporte une chape en liaison avec le levier entraíneur, et coopérant à coulissement avec un guide, et un coulisseau agencé en tiroir intermédiaire entre le guide et la chape, ledit coulisseau étant équipé d'un rebord de retenue destiné à interférer avec un épaulement conjugué de la chape pour former ladite butée d'amortissement.According to one embodiment of the invention, the telescopic link comprises a yoke in connection with the driving lever, and cooperating slidingly with a guide, and a slide arranged in an intermediate drawer between the guide and the yoke, said slide being equipped with a retaining rim intended to interfere with a conjugate shoulder of the yoke to form said damping stop.

Le ressort principal de compression est inséré entre une surface d'appui de la chape, et une embase du coulisseau, ladite embase étant située à l'opposé du rebord. Un ressort auxiliaire de polarisation se trouve intercalé coaxialement à l'intérieur du coulisseau entre le guide, et une extension longitudinale de la chape.The main compression spring is inserted between a bearing surface of the yoke, and a slide base, said base being located opposite the rim. An auxiliary spring polarization is interposed coaxially inside the slide between the guide, and a longitudinal extension of the screed.

D'autres caractéristiques et avantages ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif, et représenté aux dessins annexés, dans lesquels:

  • la figure 1 montre une vue schématique du mécanisme équipé du système accumulateur d'énergie selon l'invention, le mécanisme étant représenté dans l'état ouvert-fermé correspondant à la position d'ouverture des contacts, et à la position armée du système accumulateur;
  • la figure 2 est une vue partielle à échelle agrandie de la figure 1, montrant le système accumulateur dans la position désarmée après passage de point mort de la genouillère;
  • la figure 3 est une vue identique à la figure 1, dans l'état fermé-désarmé du mécanisme, correspondant à la position de fermeture des contacts, et à la position désarmée du système accumulateur;
  • la figure 4 montre différents diagrammes représentant la variation d'énergie de commande d'un mécanisme connu (courbe B) et d'un mécanisme selon l'invention (courbe C) en fonction de la course de l'équipage mobile.
Other characteristics and advantages will emerge more clearly from the description which follows of an embodiment of the invention given by way of nonlimiting example, and represented in the appended drawings, in which:
  • Figure 1 shows a schematic view of the mechanism equipped with the energy storage system according to the invention, the mechanism being shown in the open-closed state corresponding to the position of opening of the contacts, and to the armed position of the storage system ;
  • FIG. 2 is a partial view on an enlarged scale of FIG. 1, showing the accumulator system in the disarmed position after passing the neutral position of the toggle;
  • Figure 3 is a view identical to Figure 1, in the closed-disarmed state of the mechanism, corresponding to the closed position of the contacts, and the disarmed position of the accumulator system;
  • FIG. 4 shows different diagrams representing the variation in control energy of a known mechanism (curve B) and of a mechanism according to the invention (curve C) as a function of the travel of the moving assembly.

Sur les figures 1 à 3, 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 3, a multipolar electric circuit breaker having at least one pair of contacts 10, 12, separable by pole, is actuated by a mechanism 14 of control carried by a chassis with parallel flanges 15 and comprising a toggle joint device 16 associated with a trigger hook 18.

Le dispositif à genouillère 16 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 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 comprises a pair of links 20, 22 articulated on an axis pivot 24, the lower link 20 of transmission being mechanically coupled to a transverse switching rod 23, common to all of the poles. The bar 23 consists of a shaft 26 rotatably mounted between an open position and a position for closing the contacts 10, 12. At each pole there is a rod 30 of link which connects a crank of the bar 23 to an insulating cage 28 for supporting the contact mobile 12. The latter is connected to a connection pad 32 by a conductor flexible 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 an axis 48, is controlled by a first latch 50 half moon shape. A spring 52 for returning the opening pawl 46 is located opposite of the first lock 50 relative to the axis 48. A stop 54 formed on the pawl 46 between the axis 48 and the latch 50, cooperates in the armed position with a recess 56 in V of 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 axis 58 and cleat 44, urges hook 18 in the direction trigonometric towards the armed position (figure 1), in which the stop 54 of the pawl opening 46 is positioned in the V-shaped recess 56 of 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.The mechanism 14 includes a reset cam 62 keyed to the main axis 38 of the hook 18, and cooperating with an energy storage system 64.

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 entraíneur 70 monté à pivotement sur un axe 69. Un dispositif élastique d'accumulation d'énergie 71 est agencé entre un logement 74 du châssis et un doigt 76 de transmission du levier entraíneur 70. La came de réarmement 62 coopère avec un galet 78 du levier entraíneur 70, et le dispositif élastique 71 d'accumulation d'énergie 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 entraíneur 70 dans le sens inverse des aiguilles d'une montre sous l'action de détente du dispositif élastique 71. 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 entraíneur 70.In addition to the reset cam 62, the energy storage system 64 is equipped a closing pawl 66 controlled by a second latch 68, and a lever driver 70 pivotally mounted on an axis 69. An elastic accumulation device of energy 71 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 coach 70, and the elastic device 71 for accumulating energy biases the latter in support of the cam 62. The profile of the cam 62 comprises a first arming sector 80 of 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 in the opposite direction of clockwise under the detent action of the elastic device 71. The cam resetting 62 is also provided with a lug 84 capable of coming into abutment with the pawl closing 66 when the end of the first sector 80 of the cam 62 is in abutment on the roller 78 of the driving lever 70.

Dans la position stable de la figure 1, en position armée du système accumulateur 64, les contacts 10, 12 se trouvent, soit en position d'ouverture, soit en position de fermeture, selon l'état du dispositif à genouillère 16. 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. 1, in the armed position of the accumulator system 64, the contacts 10, 12 are either in the open position or in the closed position, according to the state of the toggle joint device 16. The roller 78 rests on the first sector 80 exerts a torque on the reset cam 62 urging the latter to rotate in the clockwise. The closing pawl 66 opposes this rotation thanks to 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, une manoeuvre de fermeture peut être commandée par actionnement du deuxième verrou 68 provoquant la pivotement du cliquet de fermeture 66 autour de son axe 88 dans le sens inverse des aiguilles d'une montre. 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 entraíneur 70. Ce dernier est alors entraíné dans le sens inverse des aiguilles d'une montre par la détente du dispositif élastique 71 de manière à transmettre une force de fermeture au dispositif à genouillère 16 déplaçant les contacts 10, 12 en position de fermeture (figure 3). 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 dispositif élastique 71.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 overload or fault. After opening of contacts 10, 12 by the toggle joint device 16, 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 counterclockwise. This results in a release of the lug 84 causing under the action of the roller 78 a pivoting of the cam 62 clockwise watch bringing the second sector 82 of the cam 62 into the lever release position trainer 70. The latter is then driven counterclockwise by the relaxation of the elastic device 71 so as to transmit a closing force to the toggle device 16 moving the contacts 10, 12 to the closed position (Figure 3). This closing maneuver takes place against the force of the opening spring 40, which is thus automatically armed when the elastic device 71 is released.

Le fonctionnement d'un tel mécanisme est décrit en détail dans le document EP-A-222 645 de la demanderesse, et le réarmement du système accumulateur 64 par compression du dispositif élastique 71 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 par rotation de la came 62 est expliquée en détail dans le document FR-A-2 558 986 de la demanderesse. L'entraínement 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 1) dans laquelle la came 62 est verrouillée par le cliquet de fermeture 66, et une position désarmée (figure 3) autorisant la libération du levier entraíneur 70 et la détente du dispositif élastique 71.The operation of such a mechanism is described in detail in document EP-A-222 645 of the plaintiff, and the rearming of the accumulator system 64 by compression of the elastic device 71 is carried out manually or automatically by means of a lever maneuver or gearmotor (not shown) fixed on the main axis 38. This reset operation by rotation of the cam 62 is explained in detail in the document FR-A-2 558 986 from the applicant. The axis rotation drive principal 38 is carried out in a clockwise direction until the stop the lug 84 of the cam 62 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, at know an armed position (Figure 1) in which the cam 62 is locked by the pawl 66, and a disarmed position (Figure 3) authorizing the release of the lever coach 70 and the relaxation of the elastic device 71.

Selon l'invention, le dispositif élastique 71 du système accumulateur d'énergie 64 pour la fermeture des contacts 10, 12 du disjoncteur, comporte une liaison télescopique 90 dans laquelle est intégrée une butée d'amortissement 91. La liaison télescopique 90 est équipée d'un guide 92 positionné dans le logement 74 du châssis, et une chape 94 susceptible de coulisser le long du guide 92, et comprenant une encoche de logement du doigt 76 du levier entraíneur 70. Un coulisseau 100 en forme de tiroir intermédiaire, est intercalé entre le guide 92 et la chape 94, et comporte un rebord 102 annulaire coopérant avec un épaulement 104 conjugué situé sur une extension longitudinale 105 de la chape 94 pour former la butée d'amortissement 91.According to the invention, the elastic device 71 of the energy accumulator system 64 for the closing of the contacts 10, 12 of the circuit breaker, comprises a telescopic connection 90 in which is integrated with a damping stop 91. The telescopic link 90 is equipped a guide 92 positioned in the housing 74 of the chassis, and a yoke 94 capable of slide along the guide 92, and comprising a housing for housing the finger 76 of the lever coach 70. A slide 100 in the form of an intermediate drawer is interposed between the guide 92 and the yoke 94, and has an annular flange 102 cooperating with a shoulder 104 conjugate located on a longitudinal extension 105 of the yoke 94 to form the stop depreciation 91.

Un ressort principal 106 de compression est inséré entre la chape 94, et une embase 108 externe du coulisseau 100, laquelle embase est située à l'opposé du rebord 102. Un ressort auxiliaire 110 de polarisation est agencé coaxialement à l'intérieur du coulisseau 100 en prenant appui sur le guide 92 et l'épaulement 104 de l'extension longitudinale 105 de la chape 94. La raideur du ressort auxiliaire 110 est inférieure à celle du ressort principal 106.A main compression spring 106 is inserted between the yoke 94, and a base 108 external of the slide 100, which base is located opposite the flange 102. A spring polarization auxiliary 110 is arranged coaxially inside the slide 100 in bearing on the guide 92 and the shoulder 104 of the longitudinal extension 105 of the yoke 94. The stiffness of the auxiliary spring 110 is less than that of the main spring 106.

Dans l'état ouvert-armé du mécanisme 14 illustré à la figure 1, la came de réarmement 62 est verrouillée dans la position armée par le cliquet de fermeture 66, et les deux ressorts 106, 110 sont comprimés au maximum par le rapprochement relatif de la chape 94 par rapport au guide 92. Le rebord 102 du coulisseau 100 est séparé longitudinalement de l'épaulement 104 de la chape 94 par une distance 112 prédéterminée.In the open-armed state of the mechanism 14 illustrated in FIG. 1, the reset cam 62 is locked in the armed position by the closing pawl 66, and the two springs 106, 110 are compressed at most by the relative approximation of the yoke 94 by relative to the guide 92. The edge 102 of the slide 100 is separated longitudinally from the shoulder 104 of the yoke 94 by a predetermined distance 112.

Après déverrouillage de la came 62 par l'action de déblocage du cliquet de fermeture 66, la détente du ressort principal 106 provoque le pivotement du levier entraíneur 70 autour de l'axe 69 dans le sens inverse des aiguilles d'une montre. Le levier entraíneur 70 agit sur la biellette supérieure 22 de manière à entraíner le dispositif à genouillère 16 jusqu'à une position intermédiaire correspondant au dépassement du point mort fermeture. Le système accumulateur 64 se trouve alors dans la position de la figure 2, dans laquelle l'épaulement 104 de la chape 94 vient en engagement contre le rebord 102 du coulisseau 100, de manière à constituer la butée d'amortissement 91 destinée à absorber l'excédent d'énergie du ressort 106, avant l'entrée en contact du levier entraíneur 70 contre le plot 114 fixe. La présence de cette butée d'amortissement 91 résulte de l'élasticité des pièces en acier, laquelle pourrait être renforcée au moyen d'une bague élastique (non représentée), agencée soit sur l'épaulement 104, soit sur le rebord 102. La bague élastique pourrait bien entendu être remplacée par tout autre interface d'absorption. After unlocking the cam 62 by the unlocking action of the closing pawl 66, the relaxation of the main spring 106 causes the driving lever 70 to pivot around axis 69 counterclockwise. The driving lever 70 acts on the upper link 22 so as to drive the toggle joint device 16 to a intermediate position corresponding to exceeding the closing dead center. The system accumulator 64 is then in the position of FIG. 2, in which the shoulder 104 of the yoke 94 comes into engagement against the rim 102 of the slide 100, so to constitute the damping stop 91 intended to absorb the excess energy of the spring 106, before the driving lever 70 comes into contact with the fixed stud 114. The presence of this damping stop 91 results from the elasticity of the steel parts, which could be reinforced by means of an elastic ring (not shown), arranged either on the shoulder 104, ie on the rim 102. The elastic ring could of course be replaced by any other absorption interface.

Dans la position fermé-désarmé illustrée à la figure 3, les contacts 10, 12 se trouvent en position de fermeture, et le ressort auxiliaire 110 polarise le levier entraíneur 70 contre le plot 114 fixe.In the closed-disarmed position illustrated in Figure 3, the contacts 10, 12 are located closed position, and the auxiliary spring 110 polarizes the driving lever 70 against the fixed pin 114.

Sur la figure 4, l'énergie de commande nécessaire pour la fermeture des contacts 10, 12 du disjoncteur est présentée par la courbe A, laquelle s'étend entre la position O d'ouverture des contacts, et le point intermédiaire PMF de passage du point mort fermeture. La courbe B illustre, l'énergie de fermeture d'un mécanisme classique, pour la course totale 11 du levier entraíneur 70, notamment celui décrit dans le document EP-A-222 645. La courbe C reflète l'énergie de fermeture du mécanisme selon l'invention, grâce à la présence de la butée d'amortissement 91 à l'intérieur de la liaison télescopique 90, permettant d'absorber l'excédent d'énergie après le produit PMF de passage du point mort fermeture. La course 12 est inférieure à la course 11, ce qui améliore l'endurance du mécanisme 14.In FIG. 4, the control energy required for closing the contacts 10, 12 of the circuit breaker is presented by curve A, which extends between the open position O of the contacts, and the intermediate point PMF for passage of the closing dead center. The curve B illustrates, the closing energy of a conventional mechanism, for the total stroke 11 of the driving lever 70, in particular that described in document EP-A-222 645. The curve C reflects the closing energy of the mechanism according to the invention, thanks to the presence of the damping stop 91 inside the telescopic link 90, making it possible to absorb the excess energy after the PMF product from the neutral point of closure. Race 12 is less than the stroke 11, which improves the endurance of the mechanism 14.

La présence de la butée d'amortissement 91 autorise également l'augmentation du nombre de départs à vide du disjoncteur. Certaines normes imposent en effet le désarmement du mécanisme à accumulation d'énergie lors d'un débrochage du disjoncteur, indépendamment de la position ouvert ou fermé des contacts. Un levier de désarmement (non représenté) est rendu actif lors de la course de débrochage du disjoncteur pour agir sur le verrou d'accrochage 68 de manière à déverrouiller le cliquet de fermeture 66 entraínant automatiquement la détente des ressorts 106, 110.The presence of the damping stop 91 also authorizes the increase in the number circuit breaker no-load starts. Certain standards indeed impose the disarmament of the energy storage mechanism when the circuit breaker is withdrawn, independently the open or closed position of the contacts. A disarm lever (not shown) is made active during the circuit-breaker drawout stroke to act on the latch hooking 68 so as to unlock the closing pawl 66 driving automatically the rebound of the springs 106, 110.

Le système accumulateur d'énergie 64 à butée 91 peut être intégré, soit directement dans le mécanisme 14 d'un disjoncteur monobloc, soit dans un bloc de télécommande accouplé mécaniquement au bloc disjoncteur.The energy storage system 64 with stop 91 can be integrated, either directly in the mechanism 14 of a one-piece circuit breaker, either in a coupled remote control unit mechanically at the circuit breaker block.

La came de réarmement 62 peut être remplacée par tout autre moyen de commande d'armement du ressort de fermeture.The reset cam 62 can be replaced by any other control means for closing the closing spring.

Claims (3)

  1. An operating mechanism for a multipole electrical circuit breaker, having a pair of separable contacts (10, 12) per pole, and comprising :
    a tripping hook (18) associated to a toggle device (16), comprising a first rod (20) articulated between a switching bar (23) and a second rod (22),
    an energy storage system (64) having a telescopic link (90) formed by a cap (94) cooperating with sliding with a guide (92) with an interposed flexible device (71) having at least one main closing spring (106),
    a drive lever (70) connected with the cap (94) and arranged between the energy storage system (64) and the second rod (22) of the toggle device (16),
    and operating means to perform switching of the telescopic link (90) from the loaded position to the unloaded position, and vice-versa,
    characterized in that :
    the telescopic link (90) comprises a slide block (100) arranged as an intermediate slide between the guide (92) and the cap (94) and comprising a retaining edge (102) designed to interfere with a conjugate shoulder (104) of the cap (94) to form a damping stop (91) integrated in the telescopic link (90) and designed to absorb the excess energy of the main closing spring (106) after the closing dead point of the toggle device (16) has been passed and before the end of travel of the drive lever (70),
    and an auxiliary polarization spring (110) is located inserted coaxially inside the slide block (100) between the guide (92) and the shoulder (104) of the cap (94).
  2. The operating mechanism according to claim 1, characterized in that the main compression spring (106) is inserted between a bearing surface of the cap (94) and a base (108) of the slide block (100), said base being situated opposite from the edge (102).
  3. The circuit breaker operating mechanism according to claim 1, characterized in that the auxiliary spring (110) bears on the shoulder (104) opposite from the damping stop (91),
EP95410068A 1994-08-01 1995-07-04 Circuit breaker mechanism provided with an energy accumulator with a damping stop Expired - Lifetime EP0696039B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9409732A FR2723252B1 (en) 1994-08-01 1994-08-01 CIRCUIT BREAKER MECHANISM PROVIDED WITH AN ENERGY ACCUMULATOR DEVICE WITH DAMPING STOP
FR9409732 1994-08-01

Publications (2)

Publication Number Publication Date
EP0696039A1 EP0696039A1 (en) 1996-02-07
EP0696039B1 true EP0696039B1 (en) 1999-01-13

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Application Number Title Priority Date Filing Date
EP95410068A Expired - Lifetime EP0696039B1 (en) 1994-08-01 1995-07-04 Circuit breaker mechanism provided with an energy accumulator with a damping stop

Country Status (7)

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US (1) US5571255A (en)
EP (1) EP0696039B1 (en)
KR (1) KR100332720B1 (en)
CN (1) CN1052330C (en)
DE (1) DE69507218T2 (en)
ES (1) ES2128685T3 (en)
FR (1) FR2723252B1 (en)

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CN103077860B (en) * 2012-12-28 2015-02-25 常熟开关制造有限公司(原常熟开关厂） Leakage tripper
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EP3208817B1 (en) 2016-02-16 2018-11-14 ABB Schweiz AG A spring operated actuator for an electric apparatus
EP3264432B1 (en) 2016-06-28 2019-01-09 ABB Schweiz AG A spring operated actuator
CN106384684A (en) * 2016-09-08 2017-02-08 国家电网公司 Breaker opening sector plate device
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Publication number Publication date
DE69507218T2 (en) 1999-07-29
ES2128685T3 (en) 1999-05-16
FR2723252B1 (en) 1996-09-13
CN1119781A (en) 1996-04-03
KR100332720B1 (en) 2002-11-23
FR2723252A1 (en) 1996-02-02
DE69507218D1 (en) 1999-02-25
CN1052330C (en) 2000-05-10
US5571255A (en) 1996-11-05
EP0696039A1 (en) 1996-02-07
KR960008885A (en) 1996-03-22

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