EP2040276B1 - Device for controlling the opening and/or closing of the electrical contacts in an electrical apparatus and electrical apparatus containing such a device - Google Patents
Device for controlling the opening and/or closing of the electrical contacts in an electrical apparatus and electrical apparatus containing such a device Download PDFInfo
- Publication number
- EP2040276B1 EP2040276B1 EP20080354053 EP08354053A EP2040276B1 EP 2040276 B1 EP2040276 B1 EP 2040276B1 EP 20080354053 EP20080354053 EP 20080354053 EP 08354053 A EP08354053 A EP 08354053A EP 2040276 B1 EP2040276 B1 EP 2040276B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- crank
- spring
- compression
- operating
- control device
- 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.)
- Not-in-force
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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
- H01H3/3005—Charging means
- H01H3/3015—Charging means using cam devices
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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
- H01H3/3031—Means for locking the spring in a charged state
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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
- H01H3/3042—Power arrangements internal to the switch for operating the driving mechanism using spring motor using a torsion spring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
- H01H5/04—Energy stored by deformation of elastic members
- H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
Definitions
- the present invention relates to a device for controlling the opening and / or closing of the contacts in an electrical apparatus
- a control crank pivotally connected to a frame, said control crank being adapted to be rotated by a control member between a first position corresponding to a closed position of the contacts and a second position corresponding to an open position of the contacts, a compression spring connected in an articulated manner by one, said first, of its ends, to said crank, and mechanically connected by its opposite end, said second, to the moving contact, and a connecting rod connected in an articulated manner by one of its ends said first to said crank and mechanically connected by its opposite end, said second, to mobile contact, said spring being able to be compressed, by its first end, by said man ivelle, to a position of passage of neutral and act upon its decompression, on the movable contact and the crank control so as to move the movable contact.
- the present invention solves this problem and provides a device for controlling the contacts in an electrical apparatus which allows fast opening and closing of the contacts, independently of the operator.
- EP-A-0 417 015 describes a control device according to the preamble of claim 1.
- the subject of the present invention is a control device according to claim 1.
- the aforementioned lock is mounted hinged relative to the frame between two positions respectively a first position called locking of the operating crank and a second unlocked said position in which said lock is retracted, said latch being recalled in the first position by a return spring having a first end hingedly connected to the frame and a second end hingedly connected to the latch.
- the aforementioned lock comprises a notch intended to cooperate with the axis of articulation of the operating crank to the connecting rod.
- this control device comprises a movable contact drive device, said device comprising a camshaft pivotally connected relative to the frame and mechanically connected to the aforementioned second end of the connecting rod, a solidary cam. in rotation of the camshaft, a guide rod connected in an articulated manner by one of its ends to the frame, these different parts being mechanically connected together by a roller having an axis, said axis being integral with a supporting rod the moving contact, said roller being slidably mounted in a light of the cam so that a rotation of the camshaft causes a displacement of the roller axis, this displacement of the roller axis causing a displacement of the movable contact.
- this control device comprises a contact pressure device comprising a cage housing a contact pressure spring and traversed by the aforementioned rod, said spring being supported by one of its ends on an inner face of the cage and its opposite end, on a part secured to the rod, said part being biased by the spring in a position in which it is supported on an inner face of the cage opposite the previous, so as to ensure the pressure of contact of the mobile contact.
- the shape of the aforementioned cam is such that no torque is exerted by the cam at the beginning of opening of the contacts before the passage of the spring beyond the neutral position, and the effort the compression spring is adjusted in such a way that, during an opening maneuver and before the spring exceeds the neutral position, the operating spring holds the contacts in the closed position.
- the compression crank comprises two stops, respectively an opening stop and a closing abutment, said abutments cooperating with the operating crank so that the compression crank drives the operating crank after the passage of the spring beyond the crossing position of the neutral position.
- the two abovementioned abutments cooperate with the axis of articulation of the operating crank to the connecting rod.
- the compression crank and the operating crank are hingedly connected to the housing about the same axis.
- control means comprises a means for maintaining the compression spring at the neutral position of the passage position and that the lock is made retractable by a voluntary action, so as to make the device triggerable.
- the compression spring is enclosed in an assembly comprising connecting rods for guiding and compressing the operating spring, said spring being interposed between two portions of connecting rods, one of which, said first, is connected in an articulated manner to the compression rod, and the other, said second, is mechanically connected to the movable contact.
- the second connecting rod portion is hingedly connected to a drive crank of the camshaft.
- Another subject of the present invention is an electrical switching device, such as a circuit breaker, comprising a contact control device comprising the previously mentioned characteristics taken alone or in combination.
- a control device D is seen of the contacts of an electrical switching device such as a switch or a disconnector, according to the invention.
- This device comprises a first set illustrated on the figure 2 said assembly comprising a camshaft 1 hingedly connected to a frame, said shaft being rotatably connected to a cam 2, and a guide rod 3 also hingedly connected to said frame by a said first one 3a, its ends.
- These parts are connected together by a roller 4 slidably mounted in an arcuate groove 5 of the cam 2 and having an axis 6 secured to a rod 7.
- This rod 7 is slidably mounted inside a cage 8 and secured by its opposite end to that connected to the roller 4, the movable contact (not shown) of the device.
- This cage 8 also comprises a housing 9 intended to receive a spring 10, said spring 10 being supported by one of its ends 10a on an inner face 8a of the cage and by its opposite end 10b on a piece 10c resting on another face 8b of the cage so as to contribute to ensuring the contact pressure between the movable contact and the fixed contact.
- These parts are connected together so that a rotation of the camshaft causes a vertical displacement of the axis 6 of the roller 4 and as a result of the movable contact.
- This device also comprises, as illustrated in the other figures, an operating crank 11 pivotally connected relative to the frame.
- This maneuvering crank 11 is connected in an articulated manner, by one end 11a, to one said first 12a of the ends 12a, 12b of a connecting rod 12, said connecting rod 12 being at its end said second 12b opposite the first, hingedly connected to a drive crank 13 of the aforesaid cam shaft 1.
- This device D also comprises a compression crank 14 connected in an articulated manner to the frame, about the same axis X that the axis around which is connected to the frame the operating crank 11.
- This compression crank 14 has one end 14a hingedly connected to an end portion 15a of a spring guide rod 15.
- This guide rod 15 comprises a set of rods for compressing and guiding an operating spring 16 interposed between its two parts ends 15a, 15b.
- This compression crank 14 includes an opening driving abutment 14c and a closing driving abutment 14b, as will be explained later.
- This device also comprises an operating lever L (illustrated on the figure 4 ) rotatably mounted relative to the frame and adapted to drive the aforesaid compression crank 14.
- This device is completed by a holding latch 17 of a drive shaft Y of the operating crank 11, said axis 11 also being the axis of articulation of the connecting rod to the connecting rod.
- the lock comprises a notch 20 cooperating with said axis, and is biased in the locking position by a tension spring 18 connected by one 18a of its ends to the frame, and its opposite end 18b to the lock.
- the opening maneuver is performed according to the following steps: From the closed position illustrated on the figure 6 the lever L is driven upward clockwise until the compression crank 14 and the spring guide rod 15 pass through the dead center line P as illustrated in FIG. figure 7 . During this step, the operating spring 16 maintains in the closed position the contacts, this thanks to the exerted force of said spring and the concentric shape of the cam 2, which in the closed position, transmits any opening torque. Beyond the neutral position of the passage, the system is driven autonomously under the effect of the operating spring 16.
- This principle keeps the contacts in position during the change of state maneuver. Only one spring is used for opening and closing. The energy delivered at the closing is twice that delivered at the opening, which adapts perfectly to the need for operation of a vacuum bulb.
- the use of the force of the two ends of the spring allows the use of a spring of lower effort.
- the evolution of the lever arms during the closure of the contacts makes it possible to compensate for the decrease in the spring force. This results in an effort retransmitted on the camshaft which remains constant over a large race. This promotes the distribution of energy to the moving contacts via the cam.
- This device makes it possible to obtain a shock during the opening which makes it possible to break the gluing or welding and which makes it possible to obtain a clean separation of the electrical contacts.
- This shock is achieved by the fact that at the opening, there is a decompression phase of the contact pressure springs. During this phase, the whole mechanism starts moving while the part 7 and the moving contact do not move. At the end of decompression of the pressure spring 10, the end 8b of the cage 8 brutally supports the rod 7 and the movable contact, generating a shock.
- this mechanism is remotely operable by motorization, the maneuver can be performed by a single movement or by pumping if necessary. This principle is mainly well suited to the training of contacts requiring significant end-of-race efforts.
- This device could use, instead of the cam system for the transmission of movement to the movable contacts, a linkage system which would have the characteristic of retransmitting very low forces for the pressurization of the electrical contacts.
- the invention is applicable to all devices performing electrical functions with a power of closing and opening, in particular of the switch type and requiring a maneuver tumbler type.
- the principle of the invention can also be used advantageously in apparatus performing the earthing switch functions having a closing power. It can also be used to perform the functions of circuit breakers with implementation of a snap to perform the trip.
Landscapes
- Valve Device For Special Equipments (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
Description
La présente invention concerne un dispositif de commande de l'ouverture et/ou de la fermeture des contacts dans un appareil électrique comprenant une manivelle de commande reliée de manière articulée par rapport à un bâti, ladite manivelle de commande étant apte à être entraînée en rotation par un organe de commande entre une première position correspondant à une position fermée des contacts et une seconde position correspondant à une position ouverte des contacts, un ressort de compression relié de manière articulée par l'une, dite première, de ses extrémités, à ladite manivelle, et reliée mécaniquement par son extrémité opposée, dite seconde, au contact mobile, et une bielle de liaison reliée de manière articulée par l'une de ses extrémités dite première à ladite manivelle et reliée mécaniquement par son extrémité opposée, dite seconde, au contact mobile, ledit ressort étant apte à être comprimé, par sa première extrémité, par ladite manivelle, jusqu'à une position de passage de point mort et à agir lors de sa décompression, sur le contact mobile et la manivelle de commande de manière à déplacer le contact mobile.The present invention relates to a device for controlling the opening and / or closing of the contacts in an electrical apparatus comprising a control crank pivotally connected to a frame, said control crank being adapted to be rotated by a control member between a first position corresponding to a closed position of the contacts and a second position corresponding to an open position of the contacts, a compression spring connected in an articulated manner by one, said first, of its ends, to said crank, and mechanically connected by its opposite end, said second, to the moving contact, and a connecting rod connected in an articulated manner by one of its ends said first to said crank and mechanically connected by its opposite end, said second, to mobile contact, said spring being able to be compressed, by its first end, by said man ivelle, to a position of passage of neutral and act upon its decompression, on the movable contact and the crank control so as to move the movable contact.
On connaît la demande de brevet française non encore publiée n°
La présente invention résout ce problème et propose un dispositif de commande des contacts dans un appareil électrique qui permette une ouverture et une fermeture rapide des contacts, indépendamment de l'opérateur.The present invention solves this problem and provides a device for controlling the contacts in an electrical apparatus which allows fast opening and closing of the contacts, independently of the operator.
Le document "
A cet effet, la présente invention a pour objet un dispositif de commande selon la revendication 1.For this purpose, the subject of the present invention is a control device according to
Selon une caractéristique particulière de l'invention, le verrou précité est monté articulé par rapport au bâti entre deux positions respectivement une première position dite de verrouillage de la manivelle de manoeuvre et une seconde position dite déverrouillée dans laquelle ledit verrou est escamoté, ledit verrou étant rappelé dans la première position par un ressort de rappel comportant une première extrémité reliée de manière articulée au bâti et une seconde extrémité reliée de manière articulée au verrou.According to a particular characteristic of the invention, the aforementioned lock is mounted hinged relative to the frame between two positions respectively a first position called locking of the operating crank and a second unlocked said position in which said lock is retracted, said latch being recalled in the first position by a return spring having a first end hingedly connected to the frame and a second end hingedly connected to the latch.
Selon une caractéristique particulière, le verrou précité comporte une encoche destinée à coopérer avec l'axe d'articulation de la manivelle de manoeuvre à la bielle de liaison.According to a particular characteristic, the aforementioned lock comprises a notch intended to cooperate with the axis of articulation of the operating crank to the connecting rod.
Selon une autre caractéristique, ce dispositif de commande comporte un dispositif d'entraînement du contact mobile, ledit dispositif comportant un arbre à came en liaison pivot par rapport au bâti et relié mécaniquement à la seconde extrémité précitée de la bielle de liaison, une came solidaire en rotation de l'arbre à came, une bielle de guidage reliée de manière articulée par l'une de ses extrémités au bâti, ces différentes pièces étant reliées mécaniquement ensemble par un galet comportant un axe, ledit axe étant solidaire d'une tige supportant le contact mobile, ledit galet étant monté coulissant dans une lumière de la came de manière à ce qu'une rotation de l'arbre à came entraîne un déplacement de l'axe galet, ce déplacement de l'axe galet entraînant un déplacement du contact mobile.According to another characteristic, this control device comprises a movable contact drive device, said device comprising a camshaft pivotally connected relative to the frame and mechanically connected to the aforementioned second end of the connecting rod, a solidary cam. in rotation of the camshaft, a guide rod connected in an articulated manner by one of its ends to the frame, these different parts being mechanically connected together by a roller having an axis, said axis being integral with a supporting rod the moving contact, said roller being slidably mounted in a light of the cam so that a rotation of the camshaft causes a displacement of the roller axis, this displacement of the roller axis causing a displacement of the movable contact.
Selon une autre caractéristique, ce dispositif de commande comporte un dispositif de pression de contact comportant une cage logeant un ressort de pression de contact et traversé par la tige précitée, ledit ressort étant en appui par l'une de ses extrémités sur une face interne de la cage et par son extrémité opposée, sur une pièce solidaire de la tige, ladite pièce étant rappelée par le ressort dans une position dans laquelle elle est en appui sur une face intérieure de la cage opposée à la précédente, de manière à assurer la pression de contact du contact mobile.According to another characteristic, this control device comprises a contact pressure device comprising a cage housing a contact pressure spring and traversed by the aforementioned rod, said spring being supported by one of its ends on an inner face of the cage and its opposite end, on a part secured to the rod, said part being biased by the spring in a position in which it is supported on an inner face of the cage opposite the previous, so as to ensure the pressure of contact of the mobile contact.
Selon une caractéristique particulière, la forme de la came précitée est telle qu'aucun couple n'est exercé par la came en début d'ouverture des contacts avant le passage du ressort au-delà de la position de point mort, et l'effort exercé par le ressort de compression est réglé de telle manière que, lors d'une manoeuvre d'ouverture et avant que le ressort ne dépasse la position de point mort, le ressort de manoeuvre maintient dans la position fermée les contacts.According to a particular characteristic, the shape of the aforementioned cam is such that no torque is exerted by the cam at the beginning of opening of the contacts before the passage of the spring beyond the neutral position, and the effort the compression spring is adjusted in such a way that, during an opening maneuver and before the spring exceeds the neutral position, the operating spring holds the contacts in the closed position.
Selon une autre caractéristique, la manivelle de compression comporte deux butées, respectivement une butée d'ouverture et une butée de fermeture, lesdites butées coopérant avec la manivelle de manoeuvre de manière que la manivelle de compression entraîne la manivelle de manoeuvre après le passage du ressort au-delà de la position de passage du point mort.According to another characteristic, the compression crank comprises two stops, respectively an opening stop and a closing abutment, said abutments cooperating with the operating crank so that the compression crank drives the operating crank after the passage of the spring beyond the crossing position of the neutral position.
Selon une autre caractéristique, les deux butées précitées coopèrent avec l'axe d'articulation de la manivelle de manoeuvre à la bielle de liaison.According to another characteristic, the two abovementioned abutments cooperate with the axis of articulation of the operating crank to the connecting rod.
Selon une autre caractéristique, la manivelle de compression et la manivelle de manoeuvre sont reliées de manière articulée au boîtier autour d'un même axe.According to another feature, the compression crank and the operating crank are hingedly connected to the housing about the same axis.
Selon une autre caractéristique, le moyen de commande comporte un moyen de maintien du ressort de compression au niveau de la position de passage du point mort et en ce que le verrou est rendu escamotable par une action volontaire, de manière à rendre l'appareil déclenchable.According to another characteristic, the control means comprises a means for maintaining the compression spring at the neutral position of the passage position and that the lock is made retractable by a voluntary action, so as to make the device triggerable.
Selon une autre caractéristique, le ressort de compression est enfermé dans un ensemble comprenant des bielles permettant le guidage et la compression du ressort de manoeuvre, ledit ressort étant interposé entre deux portions de bielles dont l'une, dite première, est reliée de manière articulée à la bielle de compression, et dont l'autre, dite seconde, est reliée mécaniquement au contact mobile.According to another characteristic, the compression spring is enclosed in an assembly comprising connecting rods for guiding and compressing the operating spring, said spring being interposed between two portions of connecting rods, one of which, said first, is connected in an articulated manner to the compression rod, and the other, said second, is mechanically connected to the movable contact.
Selon une autre caractéristique, la seconde partie de bielle est reliée de manière articulée à une manivelle d'entraînement de l'arbre à came.According to another feature, the second connecting rod portion is hingedly connected to a drive crank of the camshaft.
La présente invention a encore pour objet un appareil de coupure électrique, tel un disjoncteur, comportant un dispositif de commande des contacts comportant les caractéristiques précédemment mentionnées prise seules ou en combinaison.Another subject of the present invention is an electrical switching device, such as a circuit breaker, comprising a contact control device comprising the previously mentioned characteristics taken alone or in combination.
Mais d'autres avantages et caractéristiques de l'invention apparaîtront mieux dans la description détaillée qui suit et se réfère aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels :
- La
figure 1 est une vue de côté de l'ensemble du dispositif de commande selon l'invention, - La
figure 2 est une vue partielle d'une partie de ce dispositif de commande destinée à assurer la pression de contact, - La
figure 3 est une vue partielle du dispositif de commande précité, en position ouverte, - La
figure 4 est une vue partielle du même dispositif, dans une position de début de fermeture, - La
figure 5 est une vue de côté du même dispositif, après poursuite du mouvement de fermeture, - La
figure 6 est une vue de côté du même dispositif en position fermée, et - La
figure 7 est une vue de côté du même dispositif en début de manoeuvre d'ouverture.
- The
figure 1 is a side view of the entire control device according to the invention, - The
figure 2 is a partial view of a part of this control device intended to ensure the contact pressure, - The
figure 3 is a partial view of the aforementioned control device, in the open position, - The
figure 4 is a partial view of the same device, in a starting position of closure, - The
figure 5 is a side view of the same device, after continuing the closing movement, - The
figure 6 is a side view of the same device in the closed position, and - The
figure 7 is a side view of the same device at the beginning of the opening maneuver.
Sur la
Ce dispositif comporte également, tel qu'illustré sur les autres figures, une manivelle de manoeuvre 11 en liaison pivot par rapport au bâti. Cette manivelle de manoeuvre 11 est reliée de manière articulée, par l'une 11a de ses extrémités, à l'une dite première 12a des extrémités 12a,12b d'une bielle de liaison 12, ladite bielle de liaison 12 étant, à son extrémité dite seconde 12b opposée à la première, reliée de manière articulée à une manivelle d'entraînement 13 de l'arbre à came précité 1. Ce dispositif D comporte également une manivelle de compression 14 reliée de manière articulée au bâti, autour du même axe X que l'axe autour duquel est reliée au bâti la manivelle de manoeuvre 11. Cette manivelle de compression 14 comporte une extrémité 14a reliée de manière articulée à une partie d'extrémité 15a d'une bielle de guidage à ressorts 15. Cette bielle de guidage 15 comporte un ensemble de bielles permettant la compression et le guidage d'un ressort de manoeuvre 16 interposé entre ses deux parties d'extrémités 15a,15b. Cette manivelle de compression 14 comporte une butée d'entraînement d'ouverture 14c et une butée d'entraînement de fermeture 14b, comme ceci sera expliqué ultérieurement.
Ce dispositif comporte également un levier de manoeuvre L (illustré sur la
Ce dispositif est complété par un verrou de maintien 17 d'un axe d'entraînement Y de la manivelle de manoeuvre 11, ledit axe 11 étant également l'axe d'articulation de la bielle de manoeuvre à la bielle de liaison. A cet effet, le verrou comporte une encoche 20 coopérant avec ledit axe, et est rappelé en position de verrouillage par un ressort de traction 18 relié par l'une 18a de ses extrémités au bâti, et par son extrémité opposée 18b au verrou. Le déverrouillage de l'axe Y sera réalisé par l'intermédiaire d'un doigt de levage 19 prévu sur la manivelle de compression 14.
Le fonctionnement du dispositif va être décrit dans ce qui suit en référence aux figures.
Sur la
Au-delà de la position de passage du point mort, le système est entraîné de manière autonome sous l'effet du ressort de manoeuvre 16, tel qu'illustré sur la
Pendant cette rotation de la manivelle de compression 14 sous l'effet du ressort de manoeuvre 16, le doigt de levage 19 prévu sur ladite manivelle 14, entraîne le verrou de maintien 17 dans le sens horaire de manière que l'axe d'entraînement 11a de la manivelle de manoeuvre 11 soit libéré de l'encoche 20 prévue dans le verrou de maintien 17 dans laquelle elle était retenue. En même temps, la butée de fermeture 14b de la manivelle de compression 14 est entrée en contact avec l'axe d'entraînement Y de la manivelle de manoeuvre 11. Il s'ensuit un entraînement de la manivelle de manoeuvre 11 par la manivelle de compression 14, ce qui entraîne le mouvement de la bielle de liaison 12. Ce mouvement de la bielle de liaison 12 entraîne la manivelle d'entraînement 13 dans le sens anti-horaire, sous l'effet de la force F1 exercée par la bielle de liaison 12 et la manivelle de manoeuvre 11 (
La fermeture des contacts est maintenue grâce à l'effet du ressort de manoeuvre 16. L'effort transmis sur l'arbre à came est assuré pour une partie, par l'effort exercé directement par l'extrémité inférieure 16a du ressort de manoeuvre 16, et pour une autre partie, par l'effort exercé par l'extrémité supérieure 16b du ressort 16 retransmis par la bielle de liaison 12 au contact mobile grâce à la manivelle de manoeuvre 11 et à la manivelle de compression 14. On utilise donc les efforts exercés par les deux extrémités du ressort, ceci grâce à la position du ressort intercalée entre deux parties mobiles du mécanisme pendant la manoeuvre.
La manoeuvre d'ouverture est réalisée selon les étapes suivantes :
A partir de la position fermée illustrée sur la
Au-delà de la position de passage du point mort, le système est entraîné de manière autonome sous l'effet du ressort de manoeuvre 16. Ceci entraîne le déplacement de la manivelle de compression 14 dans le sens horaire, laquelle dans son mouvement prend en charge l'axe d'entraînement Y de la manivelle de manoeuvre 11 par l'intermédiaire de la butée 14c dite butée d'entraînement ouverture de la manoeuvre de compression 14. Au contact de la butée d'entraînement ouverture 14c avec l'axe d'entraînement Y de la manivelle de manoeuvre 11, le couple exercé par l'action F2 du ressort de manoeuvre 16 sur la manivelle de manoeuvre 11 est supérieur au couple exercé par l'action F1 de la bielle de liaison 12. Ce différentiel de couple entraîne la rotation de la manivelle de manoeuvre 11 et de l'arbre à came 1 par l'intermédiaire de la bielle de liaison 12, et en conséquence l'ouverture des contacts.
L'entraînement du sous-ensemble pression de contact se termine à l'arrêt de l'arbre à came par une butée du galet dans la lumière de la came.
Les principaux avantages procurés par l'invention sont les suivants :
Ce principe permet de maintenir les contacts en position pendant la manoeuvre de changement d'état. Un seul ressort est utilisé pour l'ouverture et la fermeture. L'énergie délivrée à la fermeture est le double de celle délivrée à l'ouverture, ce qui s'adapte parfaitement au besoin de fonctionnement d'une ampoule à vide. L'utilisation de l'effort des deux extrémités du ressort permet l'utilisation d'un ressort de plus faible effort. L'évolution des bras de levier lors de la fermeture des contacts permet de compenser la diminution de l'effort du ressort. Il en découle un effort retransmis sur l'arbre à came qui reste constant sur une grande course. Cela favorise la distribution de l'énergie vers les contacts mobiles par l'intermédiaire de la came.
Ce dispositif permet d'obtenir un choc lors de l'ouverture qui permet de briser éventuellement les collages ou les soudures et qui permet d'obtenir une séparation franche des contacts électriques. Ce choc est réalisé par le fait qu'à l'ouverture, on a une phase de décompression des ressorts de pression de contact. Pendant cette phase, tout le mécanisme se met en mouvement alors que la pièce 7 et le contact mobile ne bougent pas. En fin de décompression du ressort de pression 10, l'extrémité 8b de la cage 8 prend en charge brutalement la tige 7 et le contact mobile, en générant un choc.
On notera que ce mécanisme est manoeuvrable à distance par motorisation, la manoeuvre pouvant être réalisée par un seul mouvement ou par pompage si cela est nécessaire.
Ce principe est principalement bien adapté à l'entraînement de contacts nécessitant des efforts en fin de course importants.
Ce dispositif pourrait utiliser, à la place du système à came pour la transmission du mouvement vers les contacts mobiles, un système d'embiellage qui aurait comme caractéristique de retransmettre de très faibles efforts pour la mise en pression des contacts électriques.
L'invention est applicable à tous les dispositifs réalisant des fonctions électriques avec un pouvoir de fermeture et d'ouverture, notamment de type interrupteur et nécessitant une manoeuvre de type tumbler.
Le principe de l'invention peut également être utilisé avantageusement dans des appareils réalisant les fonctions sectionneur de mise à la terre comportant un pouvoir de fermeture.
Il peut également être utilisé pour réaliser les fonctions disjoncteurs avec mise en place d'un accrochage pour réaliser le déclenchement.On the
This device also comprises, as illustrated in the other figures, an
This device also comprises an operating lever L (illustrated on the
This device is completed by a
The operation of the device will be described in the following with reference to the figures.
On the
Beyond the neutral position, the system is driven autonomously under the effect of the
During this rotation of the
The closing of the contacts is maintained thanks to the effect of the
The opening maneuver is performed according to the following steps:
From the closed position illustrated on the
Beyond the neutral position of the passage, the system is driven autonomously under the effect of the operating
The drive of the contact pressure subassembly terminates when the camshaft stops by a stop of the roller in the lumen of the cam.
The main advantages provided by the invention are as follows:
This principle keeps the contacts in position during the change of state maneuver. Only one spring is used for opening and closing. The energy delivered at the closing is twice that delivered at the opening, which adapts perfectly to the need for operation of a vacuum bulb. The use of the force of the two ends of the spring allows the use of a spring of lower effort. The evolution of the lever arms during the closure of the contacts makes it possible to compensate for the decrease in the spring force. This results in an effort retransmitted on the camshaft which remains constant over a large race. This promotes the distribution of energy to the moving contacts via the cam.
This device makes it possible to obtain a shock during the opening which makes it possible to break the gluing or welding and which makes it possible to obtain a clean separation of the electrical contacts. This shock is achieved by the fact that at the opening, there is a decompression phase of the contact pressure springs. During this phase, the whole mechanism starts moving while the
Note that this mechanism is remotely operable by motorization, the maneuver can be performed by a single movement or by pumping if necessary.
This principle is mainly well suited to the training of contacts requiring significant end-of-race efforts.
This device could use, instead of the cam system for the transmission of movement to the movable contacts, a linkage system which would have the characteristic of retransmitting very low forces for the pressurization of the electrical contacts.
The invention is applicable to all devices performing electrical functions with a power of closing and opening, in particular of the switch type and requiring a maneuver tumbler type.
The principle of the invention can also be used advantageously in apparatus performing the earthing switch functions having a closing power.
It can also be used to perform the functions of circuit breakers with implementation of a snap to perform the trip.
Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et illustré qui n'a été donné qu'à titre d'exemple.Of course, the invention is not limited to the embodiment described and illustrated which has been given by way of example.
Au contraire, l'invention comprend tous les équivalents techniques des moyens décrits ainsi que leurs combinaisons si celles-ci sont réalisées suivant les revendications.On the contrary, the invention comprises all the technical equivalents of the means described and their combinations if they are made according to the claims.
Claims (14)
- A device for controlling opening and/or closing of the contacts in an electric apparatus comprising an operating crank connected in articulated manner with respect to a frame, said operating crank being able to be driven in rotation by control means between a first position corresponding to a closed position of the contacts and a second position corresponding to an open position of the contacts, a compression spring connected in articulated manner to said crank via one of its ends, called first end, and mechanically connected to the movable contact via its opposite end, called second end, and a connecting rod connected in articulated manner to said crank via one of its ends, called first end, and mechanically connected via its opposite end, called second end, to the movable contact, said spring being able to be compressed by said crank via its first end to a dead point passage position and, when relaxed, to act on the movable contact and the operating crank so as to move the movable contact, the device comprising a compression crank (14) and an operating crank (11) connected in articulated manner with respect to the frame, said compression crank (14) being connected in articulated manner to one of the ends of the compression spring (16) and being driven in rotation by said control means L, said operating crank (11) being connected in articulated manner to said connecting rod (12), the device comprising means (14b,14c) for enabling the operating crank (11) to be driven by the compression crank (14) after the above-mentioned compression spring (16) has moved beyond the dead point passage position P so as to cause a change of position of the movable contact, and means (17) for maintaining the movable contact in its initial position during compression of the spring (16) before said spring moves beyond the position called dead point position P, characterized in that the means for maintaining the movable contact in the open position during the closing operation comprise a securing latch (17) operating in conjunction with the operating crank (11) so as to hold said operating crank in position during compression of the spring (16), said latch being retractable by a finger called lifting finger (19) belonging to the compression crank (14) after the spring (16) has moved beyond the dead point position P.
- The control device according to claim 1, characterized in that the above-mentioned latch (17) is mounted articulated with respect to the frame between two positions, respectively a first position called latched position of the operating crank (11) and a second position called unlatched position in which said latch (17) is retracted, said latch (17) being biased to the first position by a return spring (18) comprising a first end (18a) connected in articulated manner to the frame and a second end (18b) connected in articulated manner to the latch (17).
- The control device according to claim 2, characterized in that the above-mentioned latch (17) comprises a notch (20) designed to operate in conjunction with the swivel pin Y of the operating crank (11) on the connecting rod (12).
- The control device according to any one of the foregoing claims, characterized in that it comprises a device for driving the movable contact, said device comprising a cam shaft (1) connected pivoting with respect to the frame and mechanically connected to the above-mentioned second end (12b) of the connecting rod (12), a cam (2) securedly attached in rotation to the cam shaft (1), a guide rod (3) connected in articulated manner to the frame via one (3a) of its ends, these different parts being mechanically connected to one another by a roller (4) comprising a pin (6), said pin (6) being securedly attached to a support rod (7) of the movable contact, said roller (4) being mounted sliding in an aperture (5) of the cam (2) so that a rotation of the cam shaft (1) results in movement of the roller pin (6), this movement of the roller pin (6) resulting in movement of the movable contact.
- The control device according to claim 4, characterized in that it comprises a contact pressure device comprising a tunnel (8) housing a contact pressure spring (10) and through which the above-mentioned rod (7) passes, said spring (10) pressing via one (10a) of its ends on an inner surface (8a) of the tunnel (8) and via its opposite end (10b) on a part (10c) securedly attached to the rod (7), said part (10c) being biased by the spring (10) to a position in which it is pressing on an inner surface (8b) of the tunnel (8) opposite the previous one so as to provide the contact pressure of the movable contact.
- The control device according to claim 4 or 5, characterized in that the shape of the above-mentioned cam (2) is such that no torque is exerted by the cam (2) at the beginning of opening of the contacts before the spring passes beyond the dead point position, and the force exerted by the compression spring (15) is adjusted in such a way that, when an opening operation takes place and before the spring moves beyond the dead point position, the operating spring keeps the contacts in the closed position.
- The control device according to any one of the foregoing claims, characterized in that the compression crank (14) comprises two stops (14b,14c), respectively an opening stop (14c) and a closing stop (14b), said stops operating in conjunction with the operating crank (11) so that the compression crank (14) drives the operating crank (11) after the spring (16) has moved beyond the dead point position P.
- The control device according to claim 7, characterized in that the above-mentioned two stops (14b,14c) operate in conjunction with the swivel pin Y of the operating crank (11) on the connecting rod (12).
- The control device according to any one of the foregoing claims, characterized in that the compression crank (14) and the operating crank (11) are connected in articulated manner to the case around the same axis X.
- The control device according to any one of the foregoing claims, characterized in that it comprise means for holding the compression spring (16) at the level of the dead point passage position P and in that the latch (17) is rendered retractable by deliberate action so as to make the apparatus trippable.
- The control device according to any one of the foregoing claims, characterized in that the compression spring (16) is enclosed in an assembly comprising rods for guiding and compression of the operating spring (16), said spring (16) being fitted between two portions of rods (15a,15b), one (15a) of which, called first portion, is connected in articulated manner to the compression rod (14), and the other (15b) of which, called second portion, is mechanically connected to the movable contact.
- The control device according to claim 11, characterized in that the second portion of rod (15b) is connected in articulated manner to a drive crank (13) of the cam shaft (1).
- An electric switchgear apparatus comprising a control device of the contacts according to any one of the foregoing claims.
- An electric circuit breaker comprising a control device according to claim 10.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0706548A FR2921196B1 (en) | 2007-09-18 | 2007-09-18 | DEVICE FOR CONTROLLING THE OPENING AND / OR CLOSING OF ELECTRICAL CONTACTS IN AN ELECTRICAL APPARATUS AND ELECTRICAL APPARATUS COMPRISING SUCH A DEVICE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2040276A1 EP2040276A1 (en) | 2009-03-25 |
EP2040276B1 true EP2040276B1 (en) | 2013-08-28 |
Family
ID=39201620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20080354053 Not-in-force EP2040276B1 (en) | 2007-09-18 | 2008-07-18 | Device for controlling the opening and/or closing of the electrical contacts in an electrical apparatus and electrical apparatus containing such a device |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2040276B1 (en) |
CN (1) | CN101393804B (en) |
ES (1) | ES2432764T3 (en) |
FR (1) | FR2921196B1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2980624B1 (en) * | 2011-09-23 | 2014-05-16 | Schneider Electric Ind Sas | ELECTRICAL PROTECTION APPARATUS HAVING A ROLLER SUPPORTING A MOBILE CONTACT |
DE102016214783A1 (en) * | 2016-08-09 | 2018-02-15 | Siemens Aktiengesellschaft | Jump drive and switching device with jump drive |
FR3061249B1 (en) * | 2016-12-22 | 2020-05-22 | Schneider Electric Industries Sas | DEVICE FOR GUIDING A SPRING IN A CONTROL MECHANISM AND ELECTRICAL PROTECTION APPARATUS COMPRISING SAME |
FR3089049B1 (en) * | 2018-11-26 | 2020-11-06 | Schneider Electric Ind Sas | MECHANISM FOR THE CLOSING AND OPENING COMMAND OF A POWER-CUTTING DEVICE FOR SWITCHES |
FR3093227B1 (en) * | 2019-02-21 | 2021-02-12 | Schneider Electric Ind Sas | Contact control device of a vacuum interrupter for electrical connection device |
CN112536536B (en) * | 2020-12-14 | 2021-09-07 | 河南职业技术学院 | Automatic outage structure and electric automatization laser cutting machine |
CN112750633B (en) * | 2020-12-28 | 2022-10-25 | 施耐德万高(天津)电气设备有限公司 | Energy storage spring operating mechanism of low-voltage isolation dual-power transfer switch |
CN114664581B (en) * | 2021-12-24 | 2023-09-29 | 河南平高通用电气有限公司 | Driving connecting rod assembly of outdoor three-position switch and outdoor three-position switch |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR703471A (en) | 1929-12-17 | 1931-04-30 | Siemens Et Halske Aktien Ges | Process for the manufacture of closed iron cores, in particular cores which are then subjected to a heat treatment |
US4791250A (en) * | 1987-08-06 | 1988-12-13 | Square D Company | Trip-free, three-link switch assembly |
FR2651603B1 (en) * | 1989-09-07 | 1991-11-08 | Merlin Gerin | CONTROL MECHANISM OF A HIGH VOLTAGE MULTIPOLAR SWITCH. |
FR2818796B1 (en) * | 2000-12-22 | 2003-02-07 | Schneider Electric Ind Sa | CLOSING ASSISTANCE MECHANISM FOR ELECTRICAL SWITCHING APPARATUS AND DRIVE MECHANISM OF ELECTRICAL APPARATUS PROVIDED WITH SUCH AN ASSISTANCE MECHANISM |
-
2007
- 2007-09-18 FR FR0706548A patent/FR2921196B1/en not_active Expired - Fee Related
-
2008
- 2008-07-18 EP EP20080354053 patent/EP2040276B1/en not_active Not-in-force
- 2008-07-18 ES ES08354053T patent/ES2432764T3/en active Active
- 2008-09-12 CN CN2008101494323A patent/CN101393804B/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN101393804A (en) | 2009-03-25 |
EP2040276A1 (en) | 2009-03-25 |
ES2432764T3 (en) | 2013-12-05 |
CN101393804B (en) | 2012-11-14 |
FR2921196A1 (en) | 2009-03-20 |
FR2921196B1 (en) | 2009-12-11 |
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