EP0908908B1 - Operating mechanism for a switch or a circuit breaker with three positions - Google Patents

Operating mechanism for a switch or a circuit breaker with three positions Download PDF

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Publication number
EP0908908B1
EP0908908B1 EP19980410098 EP98410098A EP0908908B1 EP 0908908 B1 EP0908908 B1 EP 0908908B1 EP 19980410098 EP19980410098 EP 19980410098 EP 98410098 A EP98410098 A EP 98410098A EP 0908908 B1 EP0908908 B1 EP 0908908B1
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EP
European Patent Office
Prior art keywords
crank
operating
closing
switch
opening
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
EP19980410098
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German (de)
French (fr)
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EP0908908A1 (en
Inventor
Claude Jay
Nicolas Puget
Bernard Jacquemet
Michel Perrone
Joseph Marzocca
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP0908908A1 publication Critical patent/EP0908908A1/en
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    • 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
    • H01H3/3026—Charging means in which the closing spring charges the opening spring or vice versa
    • 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
    • H01H3/3047—Power arrangements internal to the switch for operating the driving mechanism using spring motor adapted for operation of a three-position switch, e.g. on-off-earth

Definitions

  • a known control mechanism of the kind mentioned comprises two independent control devices, one for closing and opening the switch, and the other for closing and opening the earthing.
  • Each of these Tumbler-type devices has a spring, and interlocking systems prohibit any false operation, in particular closing of the earthing when the switch is closed.
  • These devices are complicated and of uncertain reliability.
  • Document FR-A-2660109 makes use of a single spring imposing abrupt maneuvers of the main shaft using toggle levers transmitting increasing torque to the main shaft from said position central to switch closed and earthed positions to come to these last positions in stable locking dead center of the main tree.
  • Locking device prevents rotation untimely main shaft during the arming phase, and opposes any twists when opened.
  • the mechanism includes a security additional consisting of an interlocking pallet preventing the earthing operation when the switch is closed, and Conversely. This interlocking pallet cooperates with the shafts of for example by preventing the lever from being put in place maneuver.
  • the object of the invention is to improve the performance of a control of a switch or circuit breaker with three working positions.
  • the closing spring system is arranged between two telescopic guide elements positioned between two retaining pins, one of which is mounted eccentrically on the second crank control.
  • the third control crank is rotatably mounted on an axis, and is biased against a stop integral with one of the guide elements.
  • the first control crank cooperates with an opening lock likely to occupy a locked position to hold the switch in the closed position, and the opening spring in the compressed state, and a unlocked position after unlocking a half-moon opening so as to release the first crank and allow the spring to relax opening for passage from the closed position to the position opening.
  • the second control crank is able to cooperate with a lock closing piloted by a closing half-moon to be either in a locked position for retaining the energy accumulated in the springs closing at the end of arming, either in an unlocked position causing the expansion of the closing springs on the movement of the main shaft towards the closed position.
  • the accumulated energy can be either retained by the closing lock in a first mode of Cl2 operation in circuit breaker, or used directly in the absence of closing lock to perform a closing operation in a second operating mode CI1.
  • the opening spring can be compressed in the locked position of the closing latch by the rotation of the third control crank, to obtain after passing the point dead, an operation independent of the operator for the passage to the earthing position.
  • a mechanism MC for controlling accumulation of energy is capable of actuating a switch or a circuit breaker medium voltage, which has a main shaft 15 capable of being controlled selectively in three distinct stable positions, including one position central switch opening, a closed position of the switch, and a grounding position.
  • an articulated actuating crank 14 by an operating rod 13 to an eccentric pin 12 fixed on a first control crank 6 pivotally mounted on a first axis 7.
  • the first control crank 6 In the open position, the first control crank 6 is located in stable support on a stop 9 constituted by a cylindrical stud.
  • a roller 11 On the crankpin 12 is arranged a roller 11 intended to cooperate with a cam actuator 3 mounted with a second control crank 2 on a second axis 1.
  • a system of closing springs 4 is interposed between two elements of telescopic guides 30, 31 positioned between two retaining pins 26, 27 springs, one of which 26 is mounted eccentrically on the second crank of control 2.
  • An opening spring 5 is inserted between the crank pin 12 of the first control crank 6, and a crank pin 20 linked to a third control crank 21, which will be used for actuating the MC mechanism to the earthing position.
  • the third control crank 21 is rotatably mounted on an axis 19, and is urged against a stop 23 integral with the guide element higher 30.
  • the first control crank 6 cooperates with an opening lock 25 pivotally mounted on the first axis 1, and biased in the locked position at opening halfpipe 8.
  • the second control crank 2 is able to cooperate with a locking latch. closure 24 mounted with limited pivoting on an axis 32, and controlled by means of a closing halfpipe 10.
  • control mechanism MC The operation of the control mechanism MC according to FIGS. 1 to 3 is as follows: Two types of switch operation are possible depending on whether or not the locking latch 24 is used.
  • the first type of operation CI1 uses a single latch on opening thanks to the lock 25 and the opening half-moon 8.
  • the second type of Cl2 operation in circuit breaker uses double locking on closing and to the opening thanks to the two latches 25, 24.
  • the third crank 21 is in abutment against the stop 23, and the springs of closing 4 and opening 5 are in the relaxed state.
  • a rotation action of the second axis 1 and the second crank 2 causes compression of the closing springs until crossing from neutral. From this position, the arming is finished, and the energy accumulated can be either retained by the closing latch 24 pressing on the closing half-moon 10 (operating mode Cl2) in circuit breaker, i.e. used at the end of the arming phase to carry out an operation of closing (operating mode CI1).
  • cam 3 supports the roller 11 positioned by the crankpin 12, and rotates the first control crank 6 counterclockwise.
  • Cam 3 is separated from roller 11 before the end of its stroke, the final position being defined by the alignment of axes 1, 26 and 27 authorizing the opening of the switch.
  • the pivoting of the first crank 6 from the stop 9 causes the progressive compression of the opening spring 5 linked to the crankpin 12 with a accumulation of energy required for opening.
  • the connecting rod 13 linked to the crank pin 12 sets in motion, and transmits to the crank actuation 14 a pivoting movement via the axis articulation 16.
  • the connecting rod 13 first moves in translation thanks to the presence of a light, then moves in a second step pivoting by transmitting a torque to the actuating crank 14 around the shaft 15.
  • the end of the crank stroke 14 makes it possible to obtain the switch closing position, in which cam 3 has returned the first control crank 6 in a locked position thanks to the maintaining the opening lock 25 by pressing the opening halfpipe 8 (figure 2).
  • the opening spring 5 is in support on the crankpin 20, and remains stationary thanks to the blocking of the third control crank 21 against the stop 23.
  • the first control crank 6 comes into engagement against the stop 9, and keeps the device open. Throughout the spring rebound stroke opening 5, the latter remains in stable support on the crank pin 20, which is stationary thanks to the engagement of the third crank 21 against the stop 23.
  • the opening spring 5 is stretched to the maximum and is held in this position by the opening latch 25 bearing on the opening half-moon 8.
  • a rotation action of the second axis 1 and of the second crank 2 causes the compression springs to be compressed until the neutral point is crossed.
  • the arming is finished and the accumulated energy is retained by the closing latch 24 by pressing on the closing half-moon 10. Interlocking prevents the release of closing energy when the device is already closed. Therefore, it is possible to start the 0.F.0 cycle which is: Opening of the device, Closing of the device, Opening of the device according to the previous descriptions.
  • CIT grounding is that of a control of the tumbler type described in patent FR-N_9003794, and with passing point dead pin 20 relative to axes 19 and 12.
  • the opening spring 5 of the switch is used here for both closing and opening Earth
  • Grounding can be done regardless of the disarmed or armed state closing springs 4, thanks to the rotation of the third crank control 21 clockwise.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Description

L'invention est relative à un mécanisme de commande d'un interrupteur ou disjoncteur électrique à moyenne tension, comprenant :

  • un arbre principal portant ou actionnant des contacts, et susceptible d'être sélectivement amené en trois positions distinctes stables, notamment une position centrale d'ouverture de l'interrupteur, une position de fermeture de l'interrupteur, et une position de mise à la terre,
  • un système de ressorts de fermeture, et un ressort d'ouverture coopérant avec des moyens de commande pour assurer le déplacement de l'arbre principal entre les trois positions, le passage de la position d'ouverture à la position de fermeture de l'interrupteur étant déclenché par la détente des ressorts de fermeture, et réciproquement le passage de la position de fermeture à la position d'ouverture de l'interrupteur étant engendré par la détente du ressort d'ouverture.
The invention relates to a mechanism for controlling a medium-voltage electric switch or circuit breaker, comprising:
  • a main shaft carrying or actuating contacts, and capable of being selectively brought into three distinct stable positions, in particular a central position for opening the switch, a position for closing the switch, and a position for setting Earth,
  • a system of closing springs, and an opening spring cooperating with control means to ensure the displacement of the main shaft between the three positions, the passage from the open position to the closed position of the switch being triggered by the relaxation of the closing springs, and vice versa the passage from the closed position to the open position of the switch being generated by the relaxation of the opening spring.

Un mécanisme de commande connu du genre mentionné comporte deux dispositifs de commande indépendants, l'un de fermeture et d'ouverture de l'interrupteur, et l'autre de fermeture et d'ouverture de la mise à la terre. Chacun de ces dispositifs du genre Tumbler dispose d'un ressort, et des systèmes d'inter-verrouillage interdisent toute fausse manoeuvre, notamment une fermeture de la mise à terre lorsque l'interrupteur est fermé. Ces dispositifs sont compliqués et d'une fiabilité incertaine.A known control mechanism of the kind mentioned comprises two independent control devices, one for closing and opening the switch, and the other for closing and opening the earthing. Each of these Tumbler-type devices has a spring, and interlocking systems prohibit any false operation, in particular closing of the earthing when the switch is closed. These devices are complicated and of uncertain reliability.

Le document FR-A-2660109 fait usage d'un seul ressort imposant des manoeuvres brusques de l'arbre principal grâce à des leviers à genouillères transmettant à l'arbre principal un couple croissant à partir de ladite position centrale vers les positions de fermeture de l'interrupteur et de la mise à la terre pour venir en ces dernières positions au point mort de verrouillage stable de l'arbre principal. Un dispositif de verrouillage empêche toute rotation intempestive de l'arbre principal pendant la phase d'armement, et s'oppose à tout rebondissement lors de l'ouverture. Le mécanisme comporte une sécurité additionnelle constituée par une palette d'inter-verrouillage interdisant la manoeuvre de la mise à la terre lorsque l'interrupteur est fermé, et inversement. Cette palette d'inter-verrouillage coopère avec les arbres de commande par exemple en empêchant la mise en place du levier de manoeuvre.Document FR-A-2660109 makes use of a single spring imposing abrupt maneuvers of the main shaft using toggle levers transmitting increasing torque to the main shaft from said position central to switch closed and earthed positions to come to these last positions in stable locking dead center of the main tree. Locking device prevents rotation untimely main shaft during the arming phase, and opposes any twists when opened. The mechanism includes a security additional consisting of an interlocking pallet preventing the earthing operation when the switch is closed, and Conversely. This interlocking pallet cooperates with the shafts of for example by preventing the lever from being put in place maneuver.

L'objet de l'invention consiste à améliorer les performances d'un mécanisme de commande d'un interrupteur ou disjoncteur à trois positions de travail.The object of the invention is to improve the performance of a control of a switch or circuit breaker with three working positions.

Le mécanisme de commande selon l'invention est caractérisé en ce que les moyens de commande comportent :

  • une première manivelle de commande montée à pivotement sur un premier axe et portant un maneton excentré relié par des moyens de transmission à l'arbre principal, et servant d'appui à l'une des extrémités du ressort d'ouverture,
  • une deuxième manivelle de commande montée à rotation avec une came d'actionnement sur un deuxième axe pour provoquer respectivement la compression des ressorts de fermeture jusqu'au franchissement du point mort correspondant à la position armée du mécanisme, et le déplacement en rotation au moyen d'un galet de la première manivelle par l'action de détente des ressorts de fermeture pour engendrer la compression d'ouverture, et la transmission d'un effort aux moyens de transmission,
  • et une troisième manivelle de commande portant un maneton sur lequel prend appui l'autre extrémité du ressort d'ouverture.
The control mechanism according to the invention is characterized in that the control means comprise:
  • a first control crank pivotally mounted on a first axis and carrying an eccentric crank pin connected by transmission means to the main shaft, and serving to support one of the ends of the opening spring,
  • a second control crank mounted to rotate with an actuating cam on a second axis to respectively cause the compression springs to be compressed until the neutral point corresponding to the armed position of the mechanism is crossed, and the movement in rotation by means of a roller of the first crank by the expansion action of the closing springs to generate the opening compression, and the transmission of a force to the transmission means,
  • and a third control crank carrying a crank pin on which the other end of the opening spring bears.

Selon un mode de réalisation préférentiel, le système de ressorts de fermeture est agencé entre deux éléments de guidage télescopiques positionnés entre deux axes de maintien, dont l'un est monté excentré sur la deuxième manivelle de commande.According to a preferred embodiment, the closing spring system is arranged between two telescopic guide elements positioned between two retaining pins, one of which is mounted eccentrically on the second crank control.

La troisième manivelle de commande est montée à rotation sur un axe, et est sollicitée contre une butée solidaire de l'un des éléments de guidage .The third control crank is rotatably mounted on an axis, and is biased against a stop integral with one of the guide elements.

La première manivelle de commande coopère avec un verrou d'ouverture susceptible d'occuper une position verrouillée pour le maintien de l'interrupteur en position de fermeture, et du ressort d'ouverture dans l'état comprimé, et une position déverrouillée suite au déblocage d'une demi-lune d'ouverture de manière à libérer la première manivelle et à autoriser la détente du ressort d'ouverture pour le passage de la position de fermeture vers la position d'ouverture.The first control crank cooperates with an opening lock likely to occupy a locked position to hold the switch in the closed position, and the opening spring in the compressed state, and a unlocked position after unlocking a half-moon opening so as to release the first crank and allow the spring to relax opening for passage from the closed position to the position opening.

La deuxième manivelle de commande est apte à coopérer avec un verrou de fermeture piloté par une demi-lune de fermeture pour se trouver soit dans une position verrouillée de retenue de l'énergie accumulée dans les ressorts de fermeture en fin d'armement, soit dans une position déverrouillée entraínant la détente des ressorts de fermeture sur le déplacement de l'arbre principal vers la position de fermeture.The second control crank is able to cooperate with a lock closing piloted by a closing half-moon to be either in a locked position for retaining the energy accumulated in the springs closing at the end of arming, either in an unlocked position causing the expansion of the closing springs on the movement of the main shaft towards the closed position.

En fin de course d'armement des ressorts de fermeture, l'énergie accumulée peut être soit retenue par le verrou de fermeture dans un premier mode de fonctionnement Cl2 en disjoncteur, soit utilisée directement en l'absence de verrou de fermeture pour effectuer une opération de fermeture dans un deuxième mode de fonctionnement CI1.At the end of the arming stroke of the closing springs, the accumulated energy can be either retained by the closing lock in a first mode of Cl2 operation in circuit breaker, or used directly in the absence of closing lock to perform a closing operation in a second operating mode CI1.

Selon une caractéristique de l'invention, le ressort d'ouverture peut être comprimé dans la position verrouillée du verrou de fermeture par la rotation de la troisième manivelle de commande, pour obtenir après le passage de point mort, une manoeuvre indépendante de l'opérateur pour le passage vers la position de mise à la terre.According to a characteristic of the invention, the opening spring can be compressed in the locked position of the closing latch by the rotation of the third control crank, to obtain after passing the point dead, an operation independent of the operator for the passage to the earthing position.

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

  • la figure 1 est une vue schématique éclatée du mécanisme de commande selon l'invention représentant l'appareil ouvert, et le mécanisme en position de repos ;
  • la figure 2 est une vue identique de la figure 1, l'appareil étant ouvert, et le mécanisme dans la position armée prêt pour une opération de fermeture ;
  • la figure 3 est une vue identique de la figure 2, l'appareil étant fermé, et le mécanisme dans la position armée prêt pour une opération d'ouverture.
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 represented in the appended drawings in which:
  • Figure 1 is an exploded schematic view of the control mechanism according to the invention showing the open device, and the mechanism in the rest position;
  • Figure 2 is an identical view to Figure 1, the apparatus being open, and the mechanism in the armed position ready for a closing operation;
  • Figure 3 is an identical view to Figure 2, the apparatus being closed, and the mechanism in the armed position ready for an opening operation.

En référence aux figures 1 à 3, un mécanisme MC de commande à accumulation d'énergie est apte à actionner un interrupteur ou un disjoncteur à moyenne tension, lequel possède un arbre principal 15 susceptible d'être piloté sélectivement dans trois positions distinctes stables, comprenant une position centrale d'ouverture de l'interrupteur, une position de fermeture de l'interrupteur, et une position de mise à la terre.With reference to FIGS. 1 to 3, a mechanism MC for controlling accumulation of energy is capable of actuating a switch or a circuit breaker medium voltage, which has a main shaft 15 capable of being controlled selectively in three distinct stable positions, including one position central switch opening, a closed position of the switch, and a grounding position.

Sur l'arbre principal 15 est montée une manivelle d'actionnement 14 articulée par une bielle de manoeuvre 13 à un maneton 12 excentré fixé sur une première manivelle de commande 6 montée à pivotement sur un premier axe 7. Dans la position d'ouverture, la première manivelle de commande 6 se trouve en appui stable sur une butée 9 constituée par un plot cylindrique. Sur le maneton 12 est agencé un galet 11 destiné à coopérer avec une came d'actionnement 3 montée avec une deuxième manivelle de commande 2 sur un deuxième axe 1.On the main shaft 15 is mounted an articulated actuating crank 14 by an operating rod 13 to an eccentric pin 12 fixed on a first control crank 6 pivotally mounted on a first axis 7. In the open position, the first control crank 6 is located in stable support on a stop 9 constituted by a cylindrical stud. On the crankpin 12 is arranged a roller 11 intended to cooperate with a cam actuator 3 mounted with a second control crank 2 on a second axis 1.

Un système de ressorts de fermeture 4 est intercalé entre deux éléments de guidage télescopiques 30, 31 positionnés entre deux axes 26, 27 de maintien des ressorts, dont l'un 26 est monté excentré sur la deuxième manivelle de commande 2. Un ressort d'ouverture 5 est inséré entre le maneton 12 de la première manivelle de commande 6, et un maneton 20 lié à une troisième manivelle de commande 21, laquelle sera utilisée pour l'actionnement du mécanisme MC vers la position de mise à la terre.A system of closing springs 4 is interposed between two elements of telescopic guides 30, 31 positioned between two retaining pins 26, 27 springs, one of which 26 is mounted eccentrically on the second crank of control 2. An opening spring 5 is inserted between the crank pin 12 of the first control crank 6, and a crank pin 20 linked to a third control crank 21, which will be used for actuating the MC mechanism to the earthing position.

La troisième manivelle de commande 21 est montée à rotation sur un axe 19, et est sollicitée contre une butée 23 solidaire de l'élément de guidage supérieur 30.The third control crank 21 is rotatably mounted on an axis 19, and is urged against a stop 23 integral with the guide element higher 30.

La première manivelle de commande 6 coopère avec un verrou d'ouverture 25 monté à pivotement sur le premier axe 1, et sollicité en position verrouillée au moyen d'une demi-lune d'ouverture 8.The first control crank 6 cooperates with an opening lock 25 pivotally mounted on the first axis 1, and biased in the locked position at opening halfpipe 8.

La deuxième manivelle de commande 2 est apte à coopérer avec un verrou de fermeture 24 monté à pivotement limité sur un axe 32, et piloté au moyen d'une demi-lune de fermeture 10.The second control crank 2 is able to cooperate with a locking latch. closure 24 mounted with limited pivoting on an axis 32, and controlled by means of a closing halfpipe 10.

Le fonctionnement du mécanisme MC de commande selon les figures 1 à 3 est le suivant :
Deux types de fonctionnement en interrupteur sont possibles selon que l'on utilise ou pas le verrou de fermeture 24. The operation of the control mechanism MC according to FIGS. 1 to 3 is as follows:
Two types of switch operation are possible depending on whether or not the locking latch 24 is used.

Le premier type de fonctionnement CI1 utilise un seul accrochage à l'ouverture grâce au verrou 25 et à la demi-lune d'ouverture 8. Le deuxième type de fonctionnement Cl2 en disjoncteur utilise le double accrochage à la fermeture et à l'ouverture grâce aux deux verrous 25, 24.The first type of operation CI1 uses a single latch on opening thanks to the lock 25 and the opening half-moon 8. The second type of Cl2 operation in circuit breaker uses double locking on closing and to the opening thanks to the two latches 25, 24.

Armement de la fonction interrupteur :Arming the switch function:

Dans l'état ouvert-désarmé de la figure 1, les contacts de l'appareil sont dans la position d'ouverture, et le mécanisme MC est en position désarmée de repos. La première manivelle de commande 6 est maintenue en appui contre la butée 9, et la came d'actionnement 3 est inactive en étant totalement séparée du galet 11.In the open-disarmed state of Figure 1, the device contacts are in the open position, and the MC mechanism is in the disarmed position rest. The first control crank 6 is held in abutment against the stop 9, and the actuating cam 3 is inactive by being completely separated roller 11.

La troisième manivelle 21 est en appui contre la butée 23, et les ressorts de fermeture 4 et d'ouverture 5 sont dans l'état détendu.The third crank 21 is in abutment against the stop 23, and the springs of closing 4 and opening 5 are in the relaxed state.

Une action de rotation du deuxième axe 1 et de la deuxième manivelle 2 provoque la compression des ressorts de fermeture jusqu'au franchissement du point mort. A partir de cette position, l'armement est terminé, et l'énergie accumulée peut être soit retenue par le verrou de fermeture 24 en appui sur la demi-lune de fermeture 10 (mode de fonctionnement Cl2) en disjoncteur, soit utilisée dès la fin de la phase d'armement pour effectuer une opération de fermeture (mode de fonctionnement CI1).A rotation action of the second axis 1 and the second crank 2 causes compression of the closing springs until crossing from neutral. From this position, the arming is finished, and the energy accumulated can be either retained by the closing latch 24 pressing on the closing half-moon 10 (operating mode Cl2) in circuit breaker, i.e. used at the end of the arming phase to carry out an operation of closing (operating mode CI1).

Fermeture de l'interrupteur en mode CI1 :Closing of the switch in CI1 mode:

Dans ce cas il n'y a pas de verrou de fermeture 24. A partir du franchissement du point mort en fin d'armement, l'ensemble des ressorts de fermeture 4 libère l'énergie accumulée en entraínant en rotation la came d'actionnement 3 solidaire de la deuxième manivelle 2 par l'intermédiaire de l'axe 1.In this case there is no closing lock 24. From the crossing from neutral at the end of arming, all of the closing springs 4 release the energy accumulated by rotating the actuating cam 3 secured to the second crank 2 via the axis 1.

Lors de la course en rotation, la came 3 prend en charge le galet 11 positionné par le maneton 12, et entraíne en rotation la première manivelle de commande 6 dans le sens inverse des aiguilles d'une montre. La came 3 est séparée du galet 11 avant la fin de sa course, la position finale étant définie par l'alignement des axes 1, 26 et 27 autorisant l'ouverture de l'interrupteur. During the rotational stroke, the cam 3 supports the roller 11 positioned by the crankpin 12, and rotates the first control crank 6 counterclockwise. Cam 3 is separated from roller 11 before the end of its stroke, the final position being defined by the alignment of axes 1, 26 and 27 authorizing the opening of the switch.

Le pivotement de la première manivelle 6 à partir de la butée 9 provoque la compression progressive du ressort d'ouverture 5 lié au maneton 12 avec une accumulation d'énergie nécessaire à l'ouverture. La bielle de manoeuvre 13 liée au maneton 12 se met en mouvement, et transmet à la manivelle d'actionnement 14 un mouvement de pivotement par l'intermédiaire de l'axe d'articulation 16. La bielle 13 se déplace dans un premier temps en translation grâce à la présence d'une lumière, puis se déplace dans un deuxième temps en pivotement en transmettant un couple à la manivelle d'actionnement 14 autour de l'arbre 15. La fin de course de la manivelle 14 permet d'obtenir la position de fermeture de l'interrupteur, dans laquelle la came 3 a ramené la première manivelle de commande 6 dans une position verrouillée grâce au maintien du verrou d'ouverture 25 en appui sur la demi-lune d'ouverture 8 (figure 2).The pivoting of the first crank 6 from the stop 9 causes the progressive compression of the opening spring 5 linked to the crankpin 12 with a accumulation of energy required for opening. The connecting rod 13 linked to the crank pin 12 sets in motion, and transmits to the crank actuation 14 a pivoting movement via the axis articulation 16. The connecting rod 13 first moves in translation thanks to the presence of a light, then moves in a second step pivoting by transmitting a torque to the actuating crank 14 around the shaft 15. The end of the crank stroke 14 makes it possible to obtain the switch closing position, in which cam 3 has returned the first control crank 6 in a locked position thanks to the maintaining the opening lock 25 by pressing the opening halfpipe 8 (figure 2).

Pendant toute la manoeuvre de fermeture, le ressort d'ouverture 5 est en appui sur le maneton 20, et reste immobile grâce au blocage de la troisième manivelle de commande 21 contre la butée 23.During the entire closing operation, the opening spring 5 is in support on the crankpin 20, and remains stationary thanks to the blocking of the third control crank 21 against the stop 23.

Fermeture de l'interrupteur en mode CI2Closing of the switch in CI2 mode

A partir du dépassement du point mort en fin d'armement, l'énergie des ressorts de fermeture 4 est retenue par l'appui de la deuxième manivelle 2 contre le verrou de fermeture 24 lui-même retenu par l'appui sur la demi-lune de fermeture 10. Le déverrouillage de la demi-lune de fermeture 10 par une action manuelle d'un poussoir, ou électrique au moyen d'une bobine de déclenchement, provoque le dégagement du verrou 24 et de la manivelle 2. Il en résulte une fermeture identique au fonctionnement en mode Cl1 décrit précédemment.From the passing of neutral at the end of arming, the energy of closing springs 4 is retained by the support of the second crank 2 against the closing latch 24 itself retained by pressing on the half-moon closing 10. Unlocking the closing halfpipe 10 by a manual action of a pusher, or electric by means of a coil release, releases lock 24 and crank 2. It the result is a closure identical to the operation in Cl1 mode described previously.

Ouverture de l'interrupteurSwitch opening

A partir de la position fermée de l'interrupteur (figure 3), le ressort d'ouverture 5 est tendu au maximum, et est maintenu dans cette position par le verrou d'ouverture 25 en appui sur la demi-lune d'ouverture 8. Le ressort de fermeture 4 est détendu. Le déverrouillage de la demi-lune d'ouverture 8 libère le verrou d'ouverture 25, et la première manivelle de commande 6, laquelle est déplacée en pivotement par la détente du ressort d'ouverture 5. Cette détente entraíne simultanément la bielle d'actionnement 13, et la manivelle d'actionnement 14 par l'intermédiaire de l'axe 16. La manivelle d'actionnement 14 a ainsi décrit une rotation autour de son axe 15 pour arriver dans la position interrupteur ouvert (figure 2).From the closed position of the switch (figure 3), the opening spring 5 is stretched to the maximum, and is held in this position by the latch opening 25 resting on the opening half-moon 8. The closing spring 4 is relaxed. Unlocking the opening halfpipe 8 releases the lock 25, and the first control crank 6, which is moved in pivoting by the expansion of the opening spring 5. This relaxation causes simultaneously the actuating rod 13, and the actuating crank 14 via the axis 16. The actuating crank 14 has thus described a rotation around its axis 15 to arrive in the switch position open (Figure 2).

La première manivelle de commande 6 vient en engagement contre la butée 9, et maintient l'appareil ouvert. Pendant toute la course de détente du ressort d'ouverture 5, ce dernier reste en appui stable sur le maneton 20, lequel est immobile grâce à l'engagement de la troisième manivelle 21 contre la butée 23.The first control crank 6 comes into engagement against the stop 9, and keeps the device open. Throughout the spring rebound stroke opening 5, the latter remains in stable support on the crank pin 20, which is stationary thanks to the engagement of the third crank 21 against the stop 23.

Fonctionnement disjoncteurCircuit breaker operation

A partir de la position fermée de l'interrupteur (ou disjoncteur) le ressort d'ouverture 5 est tendu au maximum et est maintenu dans cette position par le verrou d'ouverture 25 en appui sur la demi-lune d'ouverture 8.
Une action de rotation du deuxième axe 1 et de la deuxième manivelle 2 provoque la compression des ressorts de fermeture jusqu'au franchissement du point mort. L'armement est terminé et l'énergie accumulée est retenue par le verrou de fermeture 24 en appui sur la demi lune de fermeture 10.
Un inter-verrouillage empêche de libérer l'énergie de fermeture alors que l'appareil est déjà fermé.
De ce fait, il est possible d'enclencher le cycle 0.F.0 qui est : Ouverture de l'appareil, Fermeture de l'appareil, Ouverture de l'appareil et ce, suivant les descriptions précédentes.From the closed position of the switch (or circuit breaker) the opening spring 5 is stretched to the maximum and is held in this position by the opening latch 25 bearing on the opening half-moon 8.
A rotation action of the second axis 1 and of the second crank 2 causes the compression springs to be compressed until the neutral point is crossed. The arming is finished and the accumulated energy is retained by the closing latch 24 by pressing on the closing half-moon 10.
Interlocking prevents the release of closing energy when the device is already closed.
Therefore, it is possible to start the 0.F.0 cycle which is: Opening of the device, Closing of the device, Opening of the device according to the previous descriptions.

Mise à la terreGrounding

Le principe de fonctionnement CIT de mise à la terre est celui d'une commande du type Tumbler décrit dans le brevet FR-N_9003794, et à passage de point mort du maneton 20 par rapport aux axes 19 et 12. Le ressort d'ouverture 5 de l'interrupteur sert, ici, aussi bien à la fermeture qu'à l'ouverture de mise à la terreThe operating principle of CIT grounding is that of a control of the tumbler type described in patent FR-N_9003794, and with passing point dead pin 20 relative to axes 19 and 12. The opening spring 5 of the switch is used here for both closing and opening Earth

La mise à la terre peut se faire indépendamment de l'état désarmé ou armé des ressorts de fermeture 4, grâce à la rotation de la troisième manivelle de commande 21 dans le sens des aiguilles d'une montre.Grounding can be done regardless of the disarmed or armed state closing springs 4, thanks to the rotation of the third crank control 21 clockwise.

Claims (9)

  1. An operating mechanism of a medium-voltage electrical switch or circuit breaker, comprising:
    a main shaft (15) bearing or actuating contacts and designed to be selectively moved to three distinct stable positions, notably a central open position of the switch, a closed position of the switch, and an earthed position,
    a closing spring system (4), and an opening spring (5) operating in conjunction with operating means to bring about movement of the main shaft (15) between the three positions, movement from the open position to the closed position of the switch being brought about by relaxation of the closing springs (4), and vice-versa movement from the closed position to the open position of the switch being brought about by relaxation of the opening spring (5),
    characterized in that the operating means comprise:
    a first operating crank (6) mounted pivoting on a first spindle (7) and bearing an eccentric crank-pin (12) coupled by transmission means (13, 16, 14) to the main shaft (15) and acting as support for one of the ends of the opening spring (5),
    a second operating crank (2) mounted in rotation with an actuating cam (3) on a second spindle (1) to respectively cause compression of the closing springs (4) until the dead point corresponding to the loaded position of the mechanism has been passed, and rotational movement by means of a roller (11) of the first crank (6) due to the relaxation action of the closing springs (4) to generate compression of the opening spring (5) and transmission of a force to the transmission means,
    and a third operating crank (21) bearing a crank-pin (20) on which the other end of the opening spring (5) bears.
  2. The operating mechanism according to claim 1, characterized in that the closing spring system (4) is arranged between two telescopic guiding elements (30, 31) positioned between two securing spindles (26, 27), one (26) whereof is mounted eccentric on the second operating crank (2).
  3. The operating mechanism according to claim 2, characterized in that the third operating crank (21) is mounted in rotation on a spindle (19) and is urged against a stop (23) securedly affixed to one of the guiding elements (30).
  4. The operating mechanism according to claim 1, characterized in that the first operating crank (6) operates in conjunction with an opening latch (25) designed to occupy a latched position to keep the switch in the closed position and the opening spring (5) in the compressed state, and an unlatched position following unlatching of an opening half-moon (8) so as to release the first crank (6) and allow relaxation of the opening spring (5) to move from the closed position to the open position.
  5. The operating mechanism according to claim 1 or 4, characterized in that the second operating crank (2) is designed to operate in conjunction with a closing latch (24) controlled by a closing half-moon (10) so as to be either in a latched position retaining the energy stored in the closing springs (4) at the end of loading or in an unlatched position resulting in relaxation of the closing springs (4) to move the main shaft to the closed position.
  6. The operating mechanism according to claim 5, characterized in that the opening spring (5) can be compressed in the latched position of the closing latch (24) by rotation of the third operating crank (21) to obtain, after the dead point has been passed, an operation independent from the operator to move to the earthed position.
  7. The operating mechanism according to claim 1, characterized in that the transmission means comprise an operating rod (13) articulated on the crank-pin (12) and on an operating crank (14) on which the main shaft (15) is mounted.
  8. The operating mechanism according to claim 1, characterized in that the profile of the actuating cam (3) is chosen to produce a preset kinetic ratio between the angular movement of the cam (3) and that of the main shaft (15).
  9. The operating mechanism according to claim 1, characterized in that the principle of energy transfer by cams (3) is suitable for both switches and circuit breakers.
EP19980410098 1997-09-16 1998-09-04 Operating mechanism for a switch or a circuit breaker with three positions Expired - Lifetime EP0908908B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9711725 1997-09-16
FR9711725A FR2768552B1 (en) 1997-09-16 1997-09-16 CONTROL MECHANISM OF A THREE-POSITION SWITCH OR CIRCUIT BREAKER

Publications (2)

Publication Number Publication Date
EP0908908A1 EP0908908A1 (en) 1999-04-14
EP0908908B1 true EP0908908B1 (en) 2002-03-27

Family

ID=9511297

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980410098 Expired - Lifetime EP0908908B1 (en) 1997-09-16 1998-09-04 Operating mechanism for a switch or a circuit breaker with three positions

Country Status (5)

Country Link
EP (1) EP0908908B1 (en)
DE (1) DE69804403T2 (en)
ES (1) ES2174407T3 (en)
FR (1) FR2768552B1 (en)
NO (1) NO984173L (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105206442B (en) * 2015-10-21 2017-11-17 福州大学 A kind of three-station relieving mechanism and its method
FR3045930B1 (en) * 2015-12-18 2017-12-22 Schneider Electric Ind Sa DEVICE FOR GUIDING A SPRING IN A CONTROL MECHANISM AND ELECTRICAL PROTECTION APPARATUS COMPRISING IT.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1187878B (en) * 1960-12-24 1965-02-25 Continental Elektro Ind Ag Manual jump drive, especially for electrical switchgear
US3845433A (en) * 1973-09-28 1974-10-29 Arrow Hart Inc Switch operator with tripping means
US4162385A (en) * 1976-09-30 1979-07-24 Westinghouse Electric Corp. Dual spring circuit interrupter apparatus
US4251702A (en) * 1979-06-25 1981-02-17 General Electric Company Circuit breaker having multiple spring actuating mechanisms
FR2660109B1 (en) * 1990-03-23 1992-06-05 Merlin Gerin CONTROL MECHANISM OF A THREE-POSITION SWITCH.

Also Published As

Publication number Publication date
NO984173L (en) 1999-03-17
DE69804403T2 (en) 2002-10-10
DE69804403D1 (en) 2002-05-02
FR2768552B1 (en) 1999-10-22
EP0908908A1 (en) 1999-04-14
FR2768552A1 (en) 1999-03-19
ES2174407T3 (en) 2002-11-01
NO984173D0 (en) 1998-09-10

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