EP2842144B1 - A contact actuating device for a circuit breaker comprising a torsion bar - Google Patents
A contact actuating device for a circuit breaker comprising a torsion bar Download PDFInfo
- Publication number
- EP2842144B1 EP2842144B1 EP13723429.0A EP13723429A EP2842144B1 EP 2842144 B1 EP2842144 B1 EP 2842144B1 EP 13723429 A EP13723429 A EP 13723429A EP 2842144 B1 EP2842144 B1 EP 2842144B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- torsion bar
- drive shaft
- torsion
- circuit breaker
- contacts
- 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.)
- Active
Links
- 230000007246 mechanism Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/42—Driving mechanisms
-
- 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
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/40—Power arrangements internal to the switch for operating the driving mechanism using spring motor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2235/00—Springs
- H01H2235/01—Spiral spring
Definitions
- the present invention relates to a device for actuating the contacts of a high or medium voltage circuit breaker.
- the actuating device comprises a fixed contact and a movable contact, a rigid drive shaft which drives the moving contact, resilient means for driving the movable contact and a torsion bar for driving the drive shaft, the bar torsion being able to be deformed in torsion to assist the elastic means during a first part of the opening of the contacts of the circuit breaker.
- Circuit breakers in gas-insulated substations are equipped with actuators. These actuators provide the energy and torque needed to open and close the circuit breaker's movable contacts.
- the circuit breakers use either hydraulic actuators, pneumatic actuators or spring mechanisms.
- the present invention relates to a spring mechanism.
- the present invention has been developed for use preferably in gas-insulated switches. However, its application is not limited to gas insulated circuit breakers. It can also be applied to air-insulated circuit breakers, such as dead-tank circuit breakers or Live-tank. In addition, the present invention applies both to switches for indoor use and switches for use outdoors.
- the document GB 897370 discloses a spring actuating mechanism which utilizes a combination of a first spring and a torsion spring. It includes a crankshaft connected to the spring, a lost motion coupling mechanism and a contact.
- the torsion spring is connected to the crankshaft by a connecting rod, a crankshaft axis and bevel gears and by the lost motion coupling.
- this device comprises two separate springs for opening and for closing the contact. One of these springs assists the opening operation of a contact, while the other spring provides the energy necessary for the closure of this contact. In other words, the two springs do not act together mobile contact.
- the device described in this document does not describe a combined spring, intended to obtain an optimum curve of energy or torque as a function of the distance between the contacts of a circuit breaker.
- the torsion spring shown in this document is a coil spring.
- This type of spring is not optimized from the point of view of compactness since it has a housing which is separate from the crankshaft and the lost motion coupling.
- the torsion spring is mechanically connected to the lost motion coupling by means of two bevel gears.
- this device comprises a large number of parts. From a technical point of view, it is complex to realize.
- the described device comprises two torsion bars which are arranged symmetrically with respect to an elastic torsion lever. The latter is used for loading and unloading the steel torsion bars and is arranged between two contact lifting levers. During the initial part of the opening operation, the steel torsion bars apply additional torque through the contact lift levers. Thus, they separate the moving contacts of the circuit breaker.
- Each torsion bar is surrounded coaxially by a torsion tube.
- the torsion bars and the torsion tubes can be elastically deformed in torsion by means of the torsion spring lever.
- each torsion tube is immobilized in rotation with respect to the torsion spring lever.
- each bar torsion is immobilized in rotation at its distal end relative to the torsion tube which surrounds it.
- This device comprises two torsion bars and two torsion tubes. It therefore has a high number of components, which decreases reliability. Reliability is of paramount importance for spring actuators. Each additional component represents an additional risk of failure.
- the document US4302646 discloses a mechanism for actuating the contacts of a circuit breaker including a torsion bar for driving a rigid drive shaft.
- the torsion bar is housed inside the drive shaft.
- a rotating cylindrical body is surrounded by an annular cylinder.
- the annular cylinder has a plurality of orifices along its outer perimeter.
- a game in the form of a circular arc is provided inside the annular cylinder.
- the latter has the shape of a sector.
- a piston mounted outside the cylindrical rotating body penetrates the circular cylindrical arc clearance. The orifices facilitate the evacuation of a flow of fluid from the circular arc-shaped clearance to the outside of the annular cylinder.
- the piston When the cylindrical rotating body rotates counterclockwise, the piston expels the fluid out of the circular arc-shaped clearance through the orifices.
- the orifices are of calibrated diameter so that the flow of fluid escaping from the circular arc-shaped clearance is limited. Therefore, the piston and the rotating body can only move at a limited speed so that the device acts as a brake.
- This device requires a container that receives the working fluid.
- the fact that the device acts as a brake does not achieve a maximum speed between the fixed and movable contacts of a circuit breaker.
- the present invention solves the problem of developing an actuating device contacts for a two-cycle circuit breaker.
- High-voltage circuit breakers in 60-Hz networks are often required to purge a fault within the two cycles, so that their break time is limited to 33.3 ms.
- the relative speed of the contacts inside the circuit breaker must be maximized.
- the relative speed between the contacts inside a circuit breaker at the time of contact separation is crucial for extinguishing an electric arc occurring between the contacts.
- the present invention thus aims to optimize the relative speed between a fixed contact and a movable contact at the time of separation of the contacts.
- the present invention also relates to a device for actuating the contacts which minimizes the energy stored in its springs.
- the energy and torque for any relative position of the fixed and moving contacts of a circuit breaker should be as close as possible to the ideal curve.
- the optimum of this curve of energy with respect to the distance between the contacts is determined by the purpose of extinguishing the arc.
- the actuating device must also be compact. Another problem which is the basis of the invention is therefore to provide an actuating device whose dimensions are minimized.
- the torsion bar is housed inside the drive shaft, a first end of the torsion bar is connected in rotation to the shaft drive, a second end of the torsion bar being rotatably connected to a ring, the drive shaft and the torsion bar being unique.
- the device has only one torsion bar, unlike the device described in the document GB696142 .
- the number of pieces is reduced and therefore the complexity of the system is reduced.
- the torsion bar is immobilized in rotation at each of its ends, which leads to two rotating immobilizations, as opposed to the six fixed assets in rotation of the document.
- GB696142 since the torsion bar is housed inside the drive shaft, the physical bulk of the device is reduced. A compact actuation device is thus obtained.
- the elastic means consist of at least one helical spring.
- the actuating device comprises a lost motion element, through which the torsion bar is able to apply a torque on the drive shaft during a first part of the opening of the contacts.
- the lost element consists of two stops and said ring, two pistons angularly spaced from each other and secured to the ring, the pistons being adapted to abut against the abutments during rotation of the tree.
- the actuating device comprises a lever capable of exerting traction on a chain, which compresses the coil spring.
- a device for actuating the contacts of a high or medium voltage circuit breaker comprises a torsion bar 2.
- the torsion bar 2 has a central portion of smaller diameter, first and second end 4,6 of larger diameter.
- the torsion bar 2 is housed inside a drive shaft 8.
- the second end 6 of the torsion bar 2 is immobilized in rotation with respect to the drive shaft 8, for example by means of flutes or serrations. Other means of immobilization in rotation can be used, for example example a key or a pin.
- the torsion bar is immobilized in rotation with respect to a ring 10.
- the torsion bar 2 and the drive shaft 8 are coaxial with an axis 12 shown in phantom.
- the first end of the torsion bar 4 as well as its central part can rotate inside the drive shaft 8.
- the torsion bar 2 can be deformed in torsion.
- the drive shaft 8 is rigid. It does not deform in torsion. It can however rotate around its longitudinal axis 12.
- the clearance between the torsion bar and the drive shaft 8 is minimized.
- This arrangement is intended to prevent any movement of the first end 4 of the torsion bar which could be perpendicular to the axis of rotation 12 of the drive shaft 8. In other words, the first end 4 of the torsion bar can only rotate around the axis of rotation 12.
- the lost motion element It consists of two stop elements 14 and 16 and the ring 10 having two pistons 18 and 20.
- the pistons 18 and 20 are formed in one piece with the ring 10.
- the abutment elements 14 , 16, and the pistons 18, 20 are arranged symmetrically with respect to the axis of rotation 12.
- the ring 10 is rotatably connected to the first end 4 of the Torsion bar 2. Therefore, the pistons 18 and 20 are also rotatably connected to the torsion bar 2.
- the clockwise or anti-clockwise rotation of the pistons 18, 20 and the ring 10 is limited by the abutments and abutment elements 14, 16.
- the abutment elements 14, 16 are rigidly connected to the housing of the contact actuator and do not move.
- reference 22 designates a lever. This lever is non-pivotally connected to the drive shaft 8. As the lever 22 rotates, the drive shaft 8 and the second end 6 of the torsion bar 2 rotate in the same direction.
- Two bearings 24, for example ball baskets, facilitate the rotational movement of the assembly above with respect to the housing of the actuating device.
- the actuating device comprises a housing 26 with a spring.
- One end of the spring is attached to a rod 28.
- the other end of the rod 28 is fixed to a chain 30.
- the chain 30 passes over two rollers 32 and 34 movable in rotation.
- the other end of the chain that is to say the one that is not attached to the rod 28, designated by the reference 36, is attached to a fastener 38.
- the pistons 18 and 20 rotate counterclockwise. They continue their rotational movement until their radial surfaces come into contact with the abutment elements 14 and 16. Once the pistons 18 and 20 have reached their final position, they can not continue their rotational movement. The lever 22 and the drive shaft 8 continue, in turn, their rotation in the opposite direction of the clockwise. The first end 4 of the torsion bar 2 is now blocked by the engagement between the pistons 18 and 20 and the abutment members 14 and 16.
- the continued clockwise rotation of the second end 6 of the torsion bar 2 deforms the torsion bar in rotation 2.
- the torsion bar 2 is loaded .
- the lever typically continues its rotation by an angle of 10 ° to 40 °, until the torsion bar is fully loaded.
- the torsion bar 2 and the coil spring contained in the housing 26 must discharge for the actuating mechanism to actuate the moving contacts of a circuit breaker. When this occurs, the lever 22 rotates clockwise. As long as the pistons 18 and 20 are in contact with the abutment members 14 and 16, the torsion bar 2 applies an additional torque to the drive shaft 8. After a rotation of between 10 ° and 40 °, the pistons 18 and 20 are no longer in contact with the stop members 14 and 16. The torsion bar 2 no longer drives the drive shaft 8. Only the coil spring contained in the housing 26 continues to provide a torque.
- Curve 40 represents the additional torque from torsion bar 2.
- the torsion bar provides additional torque for angular positions of the drive shaft between 0 ° and 20 °. This range covers the angular position of the drive shaft 8 during which the contacts inside the circuit breaker accelerate.
- the invention solves the problem of optimizing the relative speed between the contacts of a circuit breaker at the moment of separation of the contacts, as explained above.
- torsion bar 2 does not provide additional torque for positions of the drive shaft 8 located beyond 20 °.
- Curve 42 represents the torque provided by the coil spring contained in the housing 26 alone.
- the coil spring contained in the housing 26 provides a torque over the full range of angular position of the drive shaft 8.
- the torque curve provided by the helical spring contained in the housing 26 as a function of the angular position of the drive shaft 2 is a continuous curve between 0 ° and 60 °.
- Curve 44 gives the total contributions of the helical spring contained in the housing 26 and the torsion bar 2. Because of the torque provided by the torsion bar 2, the curve has a steeper slope for the angular positions between 0 ° and 20 ° only for angular positions beyond 20 °. This total torque is close to the optimum torque curve as a function of the distance between the contacts of the circuit breaker. The lower part of the curve 42 is superimposed on the curve 44 so that it does not differ from it on the figure 3 .
- the present invention provides a device for actuating contacts of a high or medium voltage circuit breaker having improved efficiency.
- the torsion bar 2 provides additional torque only at the beginning of an opening operation and the torque provided by the coil spring housed in the housing 26 can be reduced.
- the total energy stored in the Actuating device can be lower by up to 50% compared to a solution without torsion bar.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Springs (AREA)
- Gas-Insulated Switchgears (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Description
La présente invention concerne un dispositif d'actionnement des contacts d'un disjoncteur à haute ou à moyenne tension.The present invention relates to a device for actuating the contacts of a high or medium voltage circuit breaker.
Le dispositif d'actionnement comprend un contact fixe et un contact mobile, un arbre d'entraînement rigide qui entraine le contact mobile, des moyens élastiques pour entraîner le contact mobile et une barre de torsion pour entraîner l'arbre d'entraînement, la barre de torsion étant apte à être déformée en torsion afin d'assister les moyens élastiques pendant une première partie de l'ouverture des contacts du disjoncteur.The actuating device comprises a fixed contact and a movable contact, a rigid drive shaft which drives the moving contact, resilient means for driving the movable contact and a torsion bar for driving the drive shaft, the bar torsion being able to be deformed in torsion to assist the elastic means during a first part of the opening of the contacts of the circuit breaker.
Les disjoncteurs disposés dans les sous-stations isolées au gaz sont équipées de dispositifs d'actionnement. Ces dispositifs d'actionnement fournissent l'énergie et le couple nécessaires pour ouvrir et pour fermer les contacts mobiles du disjoncteur. Les disjoncteurs utilisent soit des mécanismes d'actionnement hydraulique, soit des mécanismes d'actionnement pneumatique ou encore des mécanismes à ressorts. La présente invention concerne un mécanisme à ressorts.Circuit breakers in gas-insulated substations are equipped with actuators. These actuators provide the energy and torque needed to open and close the circuit breaker's movable contacts. The circuit breakers use either hydraulic actuators, pneumatic actuators or spring mechanisms. The present invention relates to a spring mechanism.
La présente invention a été développée pour être utilisée de préférence dans des commutateurs isolés au gaz. Toutefois son application n'est pas limitée aux disjoncteurs isolés au gaz. Elle peut être également appliquée aux disjoncteurs isolés à l'air, tels que les disjoncteurs de type « dead-tank » ou « live-tank ». De plus, la présente invention s'applique aussi bien aux commutateurs destinés à être utilisés à l'intérieur qu'aux commutateurs destinés à être utilisés à l'extérieur.The present invention has been developed for use preferably in gas-insulated switches. However, its application is not limited to gas insulated circuit breakers. It can also be applied to air-insulated circuit breakers, such as dead-tank circuit breakers or Live-tank. In addition, the present invention applies both to switches for indoor use and switches for use outdoors.
Le document
Lorsque le ressort de torsion se détend, il ferme le contact et charge le ressort. Pour faciliter l'ouverture du contact, l'accouplement à mouvement perdu découple mécaniquement le premier ressort du ressort de torsion. Le vilebrequin peut alors ouvrir le contact sans transférer de mouvement au ressort de torsion. En d'autres termes, ce dispositif comprend deux ressorts séparés pour l'ouverture et pour la fermeture du contact. L'un de ces ressorts assiste l'opération d'ouverture d'un contact, tandis que l'autre ressort fournit l'énergie nécessaire pour la fermeture de ce contact. En d'autres termes, les deux ressorts n'actionnent pas ensemble le contact mobile. Ainsi, le dispositif décrit dans ce document ne décrit pas de ressort combiné, destiné à obtenir une courbe optimum de l'énergie ou du couple en fonction de la distance entre les contacts d'un disjoncteur. Egalement, le ressort de torsion montré dans ce document est un ressort hélicoïdal. Ce type de ressort n'est pas optimisé du point de vue de sa compacité étant donné qu'il comporte un boîtier qui est séparé du vilebrequin et de l'accouplement à mouvement perdu. Le ressort de torsion est relié mécaniquement à l'accouplement à mouvement perdu au moyen de deux roues coniques. En d'autres termes, ce dispositif comprend un nombre élevé de pièces. D'un point de vue technique, il est complexe à réaliser.When the torsion spring relaxes, it closes the contact and loads the spring. To facilitate opening of the contact, the lost motion coupling mechanically disengages the first spring of the torsion spring. The crankshaft can then open the contact without transferring movement to the torsion spring. In other words, this device comprises two separate springs for opening and for closing the contact. One of these springs assists the opening operation of a contact, while the other spring provides the energy necessary for the closure of this contact. In other words, the two springs do not act together mobile contact. Thus, the device described in this document does not describe a combined spring, intended to obtain an optimum curve of energy or torque as a function of the distance between the contacts of a circuit breaker. Also, the torsion spring shown in this document is a coil spring. This type of spring is not optimized from the point of view of compactness since it has a housing which is separate from the crankshaft and the lost motion coupling. The torsion spring is mechanically connected to the lost motion coupling by means of two bevel gears. In other words, this device comprises a large number of parts. From a technical point of view, it is complex to realize.
On connait également (
Chaque barre de torsion est entourée co-axialement par un tube de torsion. Les barres de torsions et les tubes de torsion peuvent être déformés élastiquement en torsion par l'intermédiaire du levier de ressort de torsion. Dans ce but, chaque tube de torsion est immobilisé en rotation par rapport au levier de ressort de torsion. Egalement, chaque barre de torsion est immobilisée en rotation à son extrémité distale par rapport au tube de torsion qui l'entoure.Each torsion bar is surrounded coaxially by a torsion tube. The torsion bars and the torsion tubes can be elastically deformed in torsion by means of the torsion spring lever. For this purpose, each torsion tube is immobilized in rotation with respect to the torsion spring lever. Also, each bar torsion is immobilized in rotation at its distal end relative to the torsion tube which surrounds it.
Lorsqu'une barre de torsion est mise sous tension par le levier de ressort de torsion, elle transmet à son extrémité distale une partie du couple au tube de torsion. En conséquence, le ressort de torsion est mis sous tension entre son extrémité distale et l'élément de support par rapport auquel il est immobilisé en rotation. Ce dispositif comporte deux barres de torsion et deux tubes de torsion. Il comporte par conséquent un nombre élevé de composants, ce qui diminue la fiabilité. La fiabilité est d'une importance capitale pour les dispositifs d'actionnement à ressort. Chaque composant supplémentaire représente un risque de panne supplémentaire.When a torsion bar is energized by the torsion spring lever, it transmits at a distal end a portion of the torque to the torsion tube. As a result, the torsion spring is energized between its distal end and the support member with respect to which it is immobilized in rotation. This device comprises two torsion bars and two torsion tubes. It therefore has a high number of components, which decreases reliability. Reliability is of paramount importance for spring actuators. Each additional component represents an additional risk of failure.
De plus, les tubes de torsion et les barres de torsion agissent comme un ressort de torsion composite. Les ressorts doivent être immobilisés en rotation à trois endroits :
- Le ressort de torsion doit être immobilisé en rotation par rapport à l'élément de support ;
- Chaque barre de torsion est immobilisée en rotation à son extrémité distale par rapport au tube de torsion ;
- Enfin, chaque barre de torsion est immobilisée en rotation par rapport à un levier de ressort de torsion.
- The torsion spring must be immobilized in rotation with respect to the support element;
- Each torsion bar is immobilized in rotation at its distal end with respect to the torsion tube;
- Finally, each torsion bar is immobilized in rotation with respect to a torsion spring lever.
Il y a deux dispositifs de ressorts de torsion composite, ce qui se traduit par la présence de six immobilisations en rotation entre les éléments mis sous tension en torsion. Etant donné que chacun de ces six éléments est susceptibles d'une panne, le risque de défaillance est élevé. Le document
On connait également un élément à mouvement perdu qui agit comme un frein (
Lorsque le corps rotatif cylindrique tourne dans le sens contraire des aiguilles d'une montre, le piston chasse le fluide en dehors du jeu en forme d'arc circulaire par les orifices. Les orifices sont de diamètre calibré de telle sorte que le flux de fluide s'échappant hors du jeu en forme d'arc circulaire est limité. Par conséquent, le piston et le corps rotatif ne peuvent se déplacer qu'à une vitesse limitée de telle sorte que le dispositif agit comme un frein. Ce dispositif nécessite un récipient qui reçoit le fluide de travail. De plus, le fait que le dispositif agit comme un frein ne permet pas d'atteindre une vitesse maximum entre les contacts fixe et mobile d'un disjoncteur.When the cylindrical rotating body rotates counterclockwise, the piston expels the fluid out of the circular arc-shaped clearance through the orifices. The orifices are of calibrated diameter so that the flow of fluid escaping from the circular arc-shaped clearance is limited. Therefore, the piston and the rotating body can only move at a limited speed so that the device acts as a brake. This device requires a container that receives the working fluid. In addition, the fact that the device acts as a brake does not achieve a maximum speed between the fixed and movable contacts of a circuit breaker.
La présente invention résout le problème consistant à développer un dispositif d'actionnement des contacts pour un disjoncteur à deux cycles. Les disjoncteurs de circuit à haute tension dans les réseaux à 60 hertz sont souvent nécessaires pour purger un défaut à l'intérieur des deux cycles, de sorte que leur temps de rupture soit limité à 33,3 ms. Afin de purger avec succès un défaut à 60 hertz, la vitesse relative des contacts à l'intérieur du disjoncteur doit être maximisée.The present invention solves the problem of developing an actuating device contacts for a two-cycle circuit breaker. High-voltage circuit breakers in 60-Hz networks are often required to purge a fault within the two cycles, so that their break time is limited to 33.3 ms. In order to successfully purge a fault at 60 Hertz, the relative speed of the contacts inside the circuit breaker must be maximized.
Plus précisément, la vitesse relative entre les contacts à l'intérieur d'un disjoncteur au moment de la séparation des contacts est cruciale pour l'extinction d'un arc électrique apparaissant entre les contacts. La présente invention a ainsi pour objet d'optimiser la vitesse relative entre un contact fixe et un contact mobile au moment de la séparation des contacts.Specifically, the relative speed between the contacts inside a circuit breaker at the time of contact separation is crucial for extinguishing an electric arc occurring between the contacts. The present invention thus aims to optimize the relative speed between a fixed contact and a movable contact at the time of separation of the contacts.
La présente invention a également pour objet un dispositif d'actionnement des contacts qui minimise l'énergie stockée dans ses ressorts. En d'autres termes, l'énergie et le couple pour toute position relative des contacts fixe et mobile d'un disjoncteur devra être aussi proche que possible de la courbe idéale. L'optimum de cette courbe de l'énergie par rapport à la distance entre les contacts est déterminé par le but d'éteindre l'arc.The present invention also relates to a device for actuating the contacts which minimizes the energy stored in its springs. In other words, the energy and torque for any relative position of the fixed and moving contacts of a circuit breaker should be as close as possible to the ideal curve. The optimum of this curve of energy with respect to the distance between the contacts is determined by the purpose of extinguishing the arc.
Selon une autre caractéristique, le dispositif d'actionnement doit également être compact. Un autre problème qui est à la base de l'invention est par conséquent de proposer un dispositif d'actionnement dont les dimensions sont minimisées.According to another characteristic, the actuating device must also be compact. Another problem which is the basis of the invention is therefore to provide an actuating device whose dimensions are minimized.
Ces buts sont atteints, conformément à l'invention, par le fait que la barre de torsion est logée à l'intérieur de l'arbre d'entraînement, une première extrémité de la barre de torsion est en liée en rotation à l'arbre d'entrainement, une seconde extrémité de la barre de torsion étant liée en rotation à une bague, l'arbre d'entraînement et la barre de torsion étant unique.These objects are achieved according to the invention by the fact that the torsion bar is housed inside the drive shaft, a first end of the torsion bar is connected in rotation to the shaft drive, a second end of the torsion bar being rotatably connected to a ring, the drive shaft and the torsion bar being unique.
Grace à ces caractéristiques, le dispositif ne comporte qu'une seule barre de torsion, contrairement au dispositif décrit dans le document
Selon l'invention, le dispositif d'actionnement comporte un élément à mouvement perdu, par l'intermédiaire duquel la barre de torsion est apte à appliquer un couple sur l'arbre d'entraînement pendant une première partie de l'ouverture des contacts. Avantageusement, l'élément perdu est constitué de deux butées et de la dite bague, deux pistons espacés angulairement l'un de l'autre et solidaire de la bague, les pistons étant aptes à venir en butée contre les butées en cours de la rotation de l'arbre.According to the invention, the actuating device comprises a lost motion element, through which the torsion bar is able to apply a torque on the drive shaft during a first part of the opening of the contacts. Advantageously, the lost element consists of two stops and said ring, two pistons angularly spaced from each other and secured to the ring, the pistons being adapted to abut against the abutments during rotation of the tree.
Dans une réalisation particulière, le dispositif d'actionnement selon l'invention comporte un levier apte à exercer une traction sur une chaîne, ce qui comprime le ressort hélicoïdal.In a particular embodiment, the actuating device according to the invention comprises a lever capable of exerting traction on a chain, which compresses the coil spring.
D'autres caractéristiques et avantages de l'invention apparaitront encore à la lecture de la description qui suit, d'un exemple de réalisation donné à titre illustratif en référence aux figures annexées. Sur ces figures :
- La
figure 1 est une vue en perspective, partiellement en coupe, d'un dispositif d'actionnement des contacts d'un disjoncteur conforme à la présente invention ; - La
figure 2 est une vue en perspective, sous un autre angle du dispositif d'actionnement des contacts d'un disjoncteur représenté sur lafigure 1 ; - La
figure 3 est une courbe représentant le couple d'actionnement des contacts en fonction de la position angulaire de l'arbre d'entraînement.
- The
figure 1 is a perspective view, partially in section, of a device for actuating the contacts of a circuit breaker according to the present invention; - The
figure 2 is a perspective view, from another angle of the device for actuating the contacts of a circuit breaker shown in FIG.figure 1 ; - The
figure 3 is a curve representing the actuating torque of the contacts as a function of the angular position of the drive shaft.
On a représenté sur la
La barre de torsion 2 et l'arbre d'entraînement 8 sont coaxiaux à un axe 12 représenté en trait mixte.The
La première extrémité de la barre de torsion 4 ainsi que sa partie centrale peuvent tourner à l'intérieur de l'arbre d'entraînement 8. La barre de torsion 2 peut être déformée en torsion. Au contraire, l'arbre d'entraînement 8 est rigide. Il ne se déforme pas en torsion. Il peut toutefois tourner autour de son axe longitudinal 12.The first end of the
A la première extrémité 4 de la barre de torsion 2, le jeu entre la barre de torsion et l'arbre d'entraînement 8 est réduit au minimum. Cette disposition a pour but d'empêcher tout mouvement de la première extrémité 4 de la barre de torsion qui pourrait être perpendiculaire à l'axe de rotation 12 de l'arbre d'entraînement 8. En d'autres termes, la première extrémité 4 de la barre de torsion peut seulement tourner autour de l'axe de rotation 12.At the
On a représenté sur la
En se référant de nouveau à la
En se référant maintenant à la
La position des pistons 18 et 20 par rapport aux éléments de butée 14 et 16 tels que représentés sur la
Simultanément, les pistons 18 et 20 tournent dans le sens contraire des aiguilles d'une montre. Ils poursuivent leur mouvement de rotation jusqu'à ce que leurs surfaces radiales viennent au contact des éléments de butées 14 et 16. Une fois que les pistons 18 et 20 ont atteint leur position finale, ils ne peuvent plus continuer leur mouvement de rotation. Le levier 22 et l'arbre d'entraînement 8 poursuivent, quant à eux, leur rotation dans le sens contraire des aiguilles d'une montre. La première extrémité 4 de la barre de torsion 2 est maintenant bloquée par l'engagement entre les pistons 18 et 20 et les éléments de butée 14 et 16.At the same time, the
En conséquence, la poursuite de la rotation dans le sens des aiguilles d'une montre de la seconde extrémité 6 de la barre de torsion 2 déforme la barre de torsion en rotation 2. En d'autres termes, la barre de torsion 2 est chargée. Lorsque les pistons 18 et 20 viennent au contact des éléments de butée 14 et 16, le levier continue typiquement sa rotation d'un angle de 10° à 40°, jusqu'à ce que la barre de torsion soit complètement chargée.Accordingly, the continued clockwise rotation of the second end 6 of the
La barre de torsion 2 et le ressort hélicoïdal contenu dans le boîtier 26 doivent se décharger pour que le mécanisme d'actionnement actionne les contacts mobiles d'un disjoncteur. Lorsque cela se produit, le levier 22 tourne dans le sens des aiguilles d'une montre. Aussi longtemps que les pistons 18 et 20 sont au contact des éléments de butée 14 et 16, la barre de torsion 2 applique un couple supplémentaire à l'arbre d'entraînement 8. Apres une rotation comprise entre 10° et 40°, les pistons 18 et 20 ne sont plus en contact avec les éléments de butée 14 et 16. La barre de torsion 2 n'entraîne plus l'arbre d'entraînement 8. Seul, le ressort hélicoïdal contenu dans le boîtier 26 continue à fournir un couple.The
On a représenté sur la
La courbe 42 représente le couple fourni par le ressort hélicoïdal contenu dans le boîtier 26 seul. Par opposition au couple fourni par la barre de torsion, le ressort hélicoïdal contenu dans le boîtier 26 fourni un couple sur la plage complète de position angulaire de l'arbre d'entraînement 8. En d'autres termes, la courbe du couple fourni par le ressort hélicoïdal contenu dans le boîtier 26 en fonction de la position angulaire de l'arbre d'entraînement 2 est une courbe continue entre 0 ° et 60 °. La courbe 44 donne le total des contributions du ressort hélicoïdal contenu dans le boîtier 26 et de la barre de torsion 2. En raison du couple fourni par la barre de torsion 2, la courbe présente une pente plus raide pour les positions angulaires comprises entre 0° et 20° que pour les positions angulaires situées au-delà de 20°. Ce couple total est proche de la courbe optimum de couple en fonction de la distance entre les contacts du disjoncteur. La partie inférieure de la courbe 42 se superpose à la courbe 44 de telle sorte qu'elle ne s'en distingue pas sur la
En conséquence, la présente invention propose un dispositif d'actionnement des contacts d'un disjoncteur à haute ou moyenne tension présentant une efficacité améliorée. La barre de torsion 2 fourni un couple additionnel, seulement au début d'une opération d'ouverture et le couple fourni par le ressort hélicoïdal logé dans le boîtier 26 peut être réduit. En conséquence, l'énergie totale stockée dans le dispositif d'actionnement peut être inférieur jusqu'à 50 % par rapport à une solution sans barre de torsion.Accordingly, the present invention provides a device for actuating contacts of a high or medium voltage circuit breaker having improved efficiency. The
Claims (4)
- An actuator device for actuating the contacts of a high or medium voltage circuit breaker having at least one movable contact, the device comprising a rigid drive shaft (8) that drives the movable contact, resilient means for driving the movable contact, a torsion bar (2) for driving the drive shaft and a lost-motion element through which the torsion bar is suitable for applying a torque to the drive shaft (8) during the initial period of an opening operation of the contacts of the circuit breaker, wherein the torsion bar (2) is housed inside the drive shaft (8), a first end of the torsion bar (2) being constrained to turn with a ring (10) of the lost-motion element, a second end (6) of the torsion bar (2) being constrained to turn with the drive shaft (8), the actuator device comprising only one drive shaft (8) and only one torsion bar (2).
- An actuator device according to claim 1, wherein the resilient means are constituted by at least one helical spring.
- An actuator device according to claim 1, wherein the lost-motion element is constituted by two abutment elements (14, 16) and by said ring (10), by two pistons (18, 20) spaced angularly from each other and secured to the ring (10), the pistons (18 and 20) being suitable for coming into abutment against the abutment elements (14, 16) during turning of the drive shaft (8).
- An actuator device according to claim 1 further comprising a lever (22) suitable for exerting traction on a chain (30), thereby compressing the helical spring.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1253872A FR2990053B1 (en) | 2012-04-26 | 2012-04-26 | DEVICE FOR ACTUATING THE CONTACTS OF A CIRCUIT BREAKER COMPRISING A TORSION BAR |
PCT/EP2013/058645 WO2013160409A1 (en) | 2012-04-26 | 2013-04-25 | Device for actuating the contacts of a circuit breaker, comprising a torsion rod |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2842144A1 EP2842144A1 (en) | 2015-03-04 |
EP2842144B1 true EP2842144B1 (en) | 2016-06-08 |
Family
ID=48463934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13723429.0A Active EP2842144B1 (en) | 2012-04-26 | 2013-04-25 | A contact actuating device for a circuit breaker comprising a torsion bar |
Country Status (12)
Country | Link |
---|---|
US (1) | US9466447B2 (en) |
EP (1) | EP2842144B1 (en) |
JP (1) | JP6382183B2 (en) |
KR (1) | KR102052673B1 (en) |
CN (1) | CN104246945B (en) |
CA (1) | CA2866397A1 (en) |
ES (1) | ES2590858T3 (en) |
FR (1) | FR2990053B1 (en) |
HU (1) | HUE028855T2 (en) |
IN (1) | IN2014MN01772A (en) |
PL (1) | PL2842144T3 (en) |
WO (1) | WO2013160409A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2990051B1 (en) | 2012-04-25 | 2014-05-30 | Alstom Technology Ltd | SPRING TYPE CONTROL (S) OF A HIGH VOLTAGE OR MEDIUM VOLTAGE SWITCH PROVIDED WITH A RATTER WHEEL COUPLING DEVICE |
CN104078270A (en) * | 2014-07-14 | 2014-10-01 | 张亚宇 | Hydraulic operation mechanism for energy storage of torsion rod springs |
US10546701B2 (en) * | 2016-08-01 | 2020-01-28 | Mitsubishi Electric Corporation | Operating device and circuit breaker |
RU2716131C1 (en) * | 2019-03-15 | 2020-03-06 | Общество с ограниченной ответственностью Научно-производственное объединение "Электрощит" | Transfer device assembly of movable contacts of electrical devices |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB696142A (en) | 1950-11-09 | 1953-08-26 | Gen Electric Co Ltd | Improvements in or relating to torsion spring arrangements in electric circuit breakers |
GB897370A (en) | 1958-02-18 | 1962-05-23 | Uhde Gmbh Friedrich | Spring-actuated electric switch operating mechanisms |
FR1378066A (en) * | 1963-07-20 | 1964-11-13 | Merlin Gerin | Stored energy control device, in particular for electric switches |
DE1515590A1 (en) * | 1965-10-16 | 1969-07-31 | Concordia Sprecher Schalt | Spring switch mechanism for electrical switches |
US4302646A (en) * | 1980-01-14 | 1981-11-24 | Kearney-National Inc. | Electric switch and operating mechanism therefor |
DE3802371A1 (en) * | 1988-01-27 | 1989-08-10 | Concordia Sprecher Schalt | DEVICE FOR ACTUATING SWITCH-DISCONNECTORS |
JPH0374018A (en) * | 1989-08-14 | 1991-03-28 | Meidensha Corp | Power-equipment operating device |
JP3399631B2 (en) * | 1994-04-27 | 2003-04-21 | 三菱電機株式会社 | Switch spring device |
JPH10241510A (en) * | 1997-02-27 | 1998-09-11 | Mitsubishi Electric Corp | Operation device for switch |
FR2766960B1 (en) * | 1997-07-31 | 1999-09-24 | Gec Alsthom T & D Ag | QUICK CONTROL DEVICE FOR A HIGH VOLTAGE CONNECTION APPARATUS, IN PARTICULAR AN EARTH ISOLATOR |
FR2895140B1 (en) * | 2005-12-20 | 2008-01-18 | Areva T & D Sa | DEVICE FOR CONTROLLING AN ELECTRICAL EQUIPMENT |
JP4703616B2 (en) * | 2007-08-30 | 2011-06-15 | 株式会社日立製作所 | Gas insulated circuit breaker |
FR2940508B1 (en) | 2008-12-22 | 2016-02-12 | Areva T&D Ag | MECHANICAL DEVICE FOR CONTROLLING A HIGH VOLTAGE OR MEDIUM VOLTAGE DISCONNECT |
CN102368443B (en) * | 2011-10-10 | 2014-03-12 | 厦门华电开关有限公司 | Quickly-separated disconnecting switch |
-
2012
- 2012-04-26 FR FR1253872A patent/FR2990053B1/en active Active
-
2013
- 2013-04-25 US US14/396,137 patent/US9466447B2/en active Active
- 2013-04-25 JP JP2015507538A patent/JP6382183B2/en active Active
- 2013-04-25 WO PCT/EP2013/058645 patent/WO2013160409A1/en active Application Filing
- 2013-04-25 EP EP13723429.0A patent/EP2842144B1/en active Active
- 2013-04-25 KR KR1020147024796A patent/KR102052673B1/en active IP Right Grant
- 2013-04-25 PL PL13723429.0T patent/PL2842144T3/en unknown
- 2013-04-25 CA CA 2866397 patent/CA2866397A1/en not_active Abandoned
- 2013-04-25 CN CN201380021555.8A patent/CN104246945B/en not_active Expired - Fee Related
- 2013-04-25 ES ES13723429.0T patent/ES2590858T3/en active Active
- 2013-04-25 IN IN1772MUN2014 patent/IN2014MN01772A/en unknown
- 2013-04-25 HU HUE13723429A patent/HUE028855T2/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2013160409A1 (en) | 2013-10-31 |
IN2014MN01772A (en) | 2015-07-03 |
PL2842144T3 (en) | 2016-12-30 |
FR2990053A1 (en) | 2013-11-01 |
EP2842144A1 (en) | 2015-03-04 |
FR2990053B1 (en) | 2015-01-30 |
JP2015515106A (en) | 2015-05-21 |
JP6382183B2 (en) | 2018-08-29 |
HUE028855T2 (en) | 2017-01-30 |
CN104246945B (en) | 2016-11-09 |
US20150108092A1 (en) | 2015-04-23 |
KR102052673B1 (en) | 2019-12-06 |
CN104246945A (en) | 2014-12-24 |
US9466447B2 (en) | 2016-10-11 |
KR20150006820A (en) | 2015-01-19 |
ES2590858T3 (en) | 2016-11-23 |
CA2866397A1 (en) | 2013-10-31 |
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