EP2842144A1 - Device for actuating the contacts of a circuit breaker, comprising a torsion rod - Google Patents

Device for actuating the contacts of a circuit breaker, comprising a torsion rod

Info

Publication number
EP2842144A1
EP2842144A1 EP13723429.0A EP13723429A EP2842144A1 EP 2842144 A1 EP2842144 A1 EP 2842144A1 EP 13723429 A EP13723429 A EP 13723429A EP 2842144 A1 EP2842144 A1 EP 2842144A1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
torsion
torsion bar
contacts
circuit breaker
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.)
Granted
Application number
EP13723429.0A
Other languages
German (de)
French (fr)
Other versions
EP2842144B1 (en
Inventor
Peter Von Allmen
Benoît DE LUSSY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP2842144A1 publication Critical patent/EP2842144A1/en
Application granted granted Critical
Publication of EP2842144B1 publication Critical patent/EP2842144B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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 drive shaft. 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 moving contacts of the circuit breaker.
  • 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.
  • 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 its 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.
  • GB 696142 Also known (GB 696142) is a device in which steel torsion bars help the separation of the contacts inside a circuit breaker.
  • the torsion bars apply their maximum torque at the beginning of the opening operation.
  • 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 from the disjunctor.
  • Each torsion bar is co-axially surrounded 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 operated actuators. Each additional component represents an additional risk of failure.
  • torsion tubes and torsion bars act as a composite torsion spring.
  • the springs must be immobilized in rotation in three places:
  • the torsion spring must be immobilized in rotation relative to the support element
  • Each torsion bar is immobilized in rotation at its distal end with respect to the torsion tube;
  • each torsion bar is immobilized in rotation with respect to a torsion spring lever.
  • a lost motion element that acts as a brake JP10241510.
  • 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 out of 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 make it possible to reach a maximum speed between the fixed and movable contacts of a disjunctor.
  • the present invention solves the problem of developing an actuator 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 device has only one torsion bar, unlike the device described in 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 rotating immobilizations of GB696142.
  • the torsion bar is housed inside the drive shaft, the physical bulk of the device is reduced. This gives a compact actuating device.
  • the elastic means consist of at least one helical spring.
  • the actuating device comprises a lost motion element which consists of two stops and said ring, two pistons angularly spaced from one another and secured to the ring, the pistons being able to abut against the stops during the rotation of one shaft.
  • the actuating device according to the invention comprises a lever capable of exerting traction on a chain, which compresses the coil spring.
  • FIG. 1 is a perspective view, partially in section, of a device for actuating the contacts of a circuit breaker according to the present invention
  • Figure 2 is a perspective view, at another angle of the device for actuating the contacts of a circuit breaker shown in Figure 1;
  • Figure 3 is a curve showing the actuating torque of the contacts as a function of the angular position of the drive shaft.
  • FIG. 1 shows a device for actuating the contacts of a high or medium voltage circuit breaker. It 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 stop elements 14, 16 are rigidly connected to the housing of the contact actuator and do not move. When the pistons 18, 20 are in their position shown in FIG. 2, their radial surfaces come into contact with the radial surfaces of the stop elements 14, 16.
  • reference numeral 22 denotes 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 position of the pistons 18 and 20 with respect to the abutment members 14 and 16 as shown in FIG. 2 indicates that neither the torsion bar 2 nor the coil spring contained in the housing 26 is loaded.
  • the lever 22 and the drive shaft 8 are rotated counterclockwise.
  • the lever 22 pulls the upper end of the chain 30 to the right (according to FIG. 2) thus compressing the helical spring contained in the housing 26.
  • 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 actuation 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.
  • FIG. 3 shows a curve of the torque as a function of the angular position of the drive shaft.
  • 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. In contrast to the torque provided by the torsion bar, the coil spring contained in the housing 26 provides a torque over the full range of angular position of the drive shaft 8. In other words, 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 in FIG.
  • 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 up to 50% lower than a solution without torsion bar.

Abstract

It comprises a fixed contact and a mobile contact, a rigid drive shaft (8) that drives the mobile contact, a first elastic means for driving the mobile contact, and a torsion rod (2) for driving the drive shaft, the torsion rod (2) being able to be twisted in order to assist the elastic means during a first part of the opening of the contacts of the circuit breaker. The torsion rod (2) is housed inside the drive shaft (8). A first end (4) of the torsion rod (2) is rotatably connected to a ring (10), and a second end (6) of the torsion rod (2) is rotatably connected to the drive shaft (8).

Description

DISPOSITIF D ' ACTIONNEMENT DES CONTACTS D ' UN DISJONCTEUR COMPORTANT UNE BARRE DE TORSION  DEVICE FOR ACTUATING THE CONTACTS OF A CIRCUIT BREAKER HAVING A TORSION BAR
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 drive shaft. 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 moving contacts of the circuit breaker. 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 GB 897370 décrit un mécanisme d' actionnement à ressorts qui utilise une combinaison d'un premier ressort et d'un ressort de torsion. Il comprend un vilebrequin relié au ressort, à un mécanisme de couplage à mouvement perdu et un contact. Le ressort de torsion est relié au vilebrequin par une bielle, par un axe de vilebrequin et des pignons coniques et par l'accouplement à mouvement perdu.  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.
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 its 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 connaît également (GB 696142) un dispositif dans lequel des barres de torsion en acier aident la séparation des contacts à l'intérieur d'un disjoncteur. Dans ce dispositif, les barres de torsion appliquent leur couple maximum au début de l'opération d'ouverture. Le dispositif décrit comprend deux barres de torsion qui sont disposées symétriquement par rapport à un levier de torsion élastique. Ce dernier est utilisé pour charger et pour décharger les barres de torsion en acier et il est disposé entre deux leviers de levage de contact. Durant la partie initiale de l'opération d'ouverture, les barres de torsion en acier appliquent un couple supplémentaire par l'intermédiaire des leviers de levage de contact. Ainsi, ils séparent les contacts mobiles du disj oncteur .  Also known (GB 696142) is a device in which steel torsion bars help the separation of the contacts inside a circuit breaker. In this device, the torsion bars apply their maximum torque at the beginning of the opening operation. 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 from the disjunctor.
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 co-axially surrounded 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 operated 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 :  In addition, torsion tubes and torsion bars act as a composite torsion spring. The springs must be immobilized in rotation in three places:
- Le ressort de torsion doit être immobilisé en rotation par rapport à l'élément de support ;  - The torsion spring must be immobilized in rotation relative to the support element;
Chaque barre de torsion est immobilisée en rotation à son extrémité distale par rapport au tube de torsion ;  Each torsion bar is immobilized in rotation at its distal end with respect to the torsion tube;
Enfin, chaque barre de torsion est immobilisée en rotation par rapport à un levier de ressort de torsion.  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. There are two composite torsion spring devices, which translates into the presence of six rotating attachments between the elements set under tension in torsion. Since each of these six elements is susceptible to failure, the risk of failure is high.
On connaît également un élément à mouvement perdu qui agit comme un frein (JP10241510) . Un corps cylindrique rotatif est entouré par un cylindre annulaire. Le cylindre annulaire comporte plusieurs orifices le long de son périmètre extérieur. Un jeu en forme d'arc circulaire est prévu à l'intérieur du cylindre annulaire. Ce dernier présente la forme d'un secteur. Un piston monté à l'extérieur du corps rotatif cylindrique pénètre dans le jeu d'arc cylindrique circulaire. Les orifices facilitent l'évacuation d'un flux de fluide du jeu en forme d'arc circulaire vers l'extérieur du cylindre annulaire.  There is also known a lost motion element that acts as a brake (JP10241510). 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.
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 disj oncteur .  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 out of 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 make it possible to reach a maximum speed between the fixed and movable contacts of a disjunctor.
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 actuator 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. 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'entraînement, 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. 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. 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 a second end of the torsion bar being rotatably connected to a ring, the drive shaft and the torsion bar being unique.
Grâce à ces caractéristiques, le dispositif ne comporte qu'une seule barre de torsion, contrairement au dispositif décrit dans le document GB696142. Le nombre de pièces est donc réduit et par conséquent la complexité du système est réduite. De plus, la barre de torsion est immobilisée en rotation à chacune de ses extrémités, ce qui conduit à deux immobilisations en rotation, par opposition aux six immobilisations en rotation du document GB696142. De plus, étant donné que la barre de torsion est logée à l'intérieur de l'arbre d'entraînement, l'encombrement physique du dispositif est réduit. On obtient donc un dispositif d' actionnement compact. De préférence les moyens élastiques sont constitués d'au moins un ressort hélicoïdal .  Thanks to these characteristics, the device has only one torsion bar, unlike the device described in GB696142. The number of pieces is reduced and therefore the complexity of the system is reduced. In addition, the torsion bar is immobilized in rotation at each of its ends, which leads to two rotating immobilizations, as opposed to the six rotating immobilizations of GB696142. In addition, since the torsion bar is housed inside the drive shaft, the physical bulk of the device is reduced. This gives a compact actuating device. Preferably, the elastic means consist of at least one helical spring.
Avantageusement, le dispositif d' actionnement comporte un élément à mouvement perdu qui 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 1' arbre . 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. Advantageously, the actuating device comprises a lost motion element which consists of two stops and said ring, two pistons angularly spaced from one another and secured to the ring, the pistons being able to abut against the stops during the rotation of one shaft. 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 apparaîtront 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 :  Other features and advantages of the invention will become apparent upon reading the description which follows, of an exemplary embodiment given by way of illustration with reference to the appended figures. In these 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 ;  - 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;
La figure 2 est une vue en perspective, sous un autre angle du dispositif d' actionnement des contacts d'un disjoncteur représenté sur la figure 1 ;  Figure 2 is a perspective view, at another angle of the device for actuating the contacts of a circuit breaker shown in Figure 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.  Figure 3 is a curve showing the actuating torque of the contacts as a function of the angular position of the drive shaft.
On a représenté sur la figure 1 un dispositif d' actionnement des contacts d'un disjoncteur à haute ou moyenne tension. Il comprend une barre de torsion 2. La barre de torsion 2 comporte une partie centrale de plus petit diamètre, une première et une deuxième extrémité 4,6 de plus grand diamètre. La barre de torsion 2 est logée à l'intérieur d'un arbre d'entraînement 8. La seconde extrémité 6 de la barre de torsion 2 est immobilisée en rotation par rapport à l'arbre d'entraînement 8, par exemple au moyen de cannelures ou de dentelures. D'autres moyens d'immobilisation en rotation peuvent être utilisés, par exemple une clavette ou une goupille. A sa première extrémité 4, la barre de torsion est immobilisée en rotation par rapport à une bague 10. FIG. 1 shows a device for actuating the contacts of a high or medium voltage circuit breaker. It 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. At its first end 4, the torsion bar is immobilized in rotation with respect to a ring 10.
La barre de torsion 2 et l'arbre d' entraînement 8 sont coaxiaux à un axe 12 représenté en trait mixte.  The torsion bar 2 and the drive shaft 8 are coaxial with an axis 12 shown in phantom.
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 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. On the contrary, the drive shaft 8 is rigid. It does not deform in torsion. It can however rotate around its longitudinal axis 12.
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 first end 4 of the torsion bar 2, 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.
On a représenté sur la figure 2 l'élément à mouvement perdu. Il est constitué de deux éléments d'arrêt 14 et 16 et de l'anneau 10 comportant deux pistons 18 et 20. De préférence, les pistons 18 et 20 sont réalisés d'une seule pièce avec la bague 10. Les éléments de butée 14, 16, ainsi que les pistons 18, 20 sont disposés symétriquement par rapport à l'axe de rotation 12. Conformément à l'invention, la bague 10 est liée en rotation à la première extrémité 4 de la barre de torsion 2. Par conséquent, les pistons 18 et 20 sont également liés en rotation par rapport à la barre de torsion 2. La rotation dans le sens horaire ou dans le sens anti-horaire des pistons 18, 20 et de la bague 10 est limité par les butées et éléments de butées 14, 16. Les éléments de butées 14, 16 sont rigidement liés au boîtier du dispositif d' actionnement des contacts et ne se déplacent pas. Lorsque les pistons 18, 20 sont dans leur position représentées sur la figure 2, leurs surfaces radiales viennent au contact des surfaces radiales des éléments de butée 14, 16. There is shown in Figure 2 the lost motion element. It consists of two stop elements 14 and 16 and the ring 10 having two pistons 18 and 20. Preferably, 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. According to the invention, 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 The stop elements 14, 16 are rigidly connected to the housing of the contact actuator and do not move. When the pistons 18, 20 are in their position shown in FIG. 2, their radial surfaces come into contact with the radial surfaces of the stop elements 14, 16.
En se référant de nouveau à la figure 1, la référence 22 désigne un levier. Ce levier est relié de manière non pivotante à l'arbre d'entraînement 8. Lorsque le levier 22 tourne, l'arbre d'entraînement 8 et la seconde extrémité 6 de la barre de torsion 2 tournent dans la même direction. Deux paliers 24, par exemple des paniers à billes, facilitent le mouvement de rotation de l'ensemble ci-dessus par rapport au boîtier du dispositif d' actionnement .  Referring again to Figure 1, reference numeral 22 denotes 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.
En se référant maintenant à la figure 2, le dispositif d' actionnement comporte un boîtier 26 avec un ressort. Une extrémité du ressort est fixée à une tige 28. L'autre extrémité de la tige 28 est fixée à une chaîne 30. La chaîne 30 passe sur deux galets 32 et 34 mobiles en rotation. L'autre extrémité de la chaîne, c'est-à-dire celle qui n'est pas fixée à la tige 28, désignée par la référence 36, est fixée à une attache 38. La position des pistons 18 et 20 par rapport aux éléments de butée 14 et 16 tels que représentés sur la figure 2, indiquent que ni la barre de torsion 2 ni le ressort hélicoïdal contenu dans le boîtier 26 ne sont chargés. Pour charger la barre de torsion 2 et le ressort hélicoïdal contenu dans le boîtier 26, le levier 22 et l'arbre d'entraînement 8 sont tournés dans le sens anti- horaire. Le levier 22 tire l'extrémité supérieure de la chaîne 30 vers la droite (selon la figure 2) comprimant ainsi le ressort hélicoïdal contenu dans le boîtier 26. Referring now to FIG. 2, 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 position of the pistons 18 and 20 with respect to the abutment members 14 and 16 as shown in FIG. 2 indicates that neither the torsion bar 2 nor the coil spring contained in the housing 26 is loaded. To load the torsion bar 2 and the coil spring contained in the housing 26, the lever 22 and the drive shaft 8 are rotated counterclockwise. The lever 22 pulls the upper end of the chain 30 to the right (according to FIG. 2) thus compressing the helical spring contained in the housing 26.
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 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.
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. As a result, the continued clockwise rotation of the second end 6 of the torsion bar 2 deforms the torsion bar in rotation 2. In other words, the torsion bar 2 is loaded . When the pistons 18 and 20 come into contact with the stop elements 14 and 16, the lever typically continues its rotation by an angle of 10 ° to 40 °, until the torsion bar is fully loaded.
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 torsion bar 2 and the coil spring contained in the housing 26 must discharge for the actuation 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.
On a représenté sur la figure 3 une courbe du couple en fonction de la position angulaire de l'arbre d'entraînement. La courbe 40 représente le couple additionnel provenant de la barre de torsion 2. Conformément à la figure 3, la barre de torsion fournit un couple additionnel pour des positions angulaires de l'arbre d'entraînement comprises entre 0° et 20°. Cette plage couvre la position angulaire de l'arbre d'entraînement 8 pendant laquelle les contacts à l'intérieur du disjoncteur accélèrent. Ainsi, l'invention résout le problème consistant à optimiser la vitesse relative entre les contacts d'un disjoncteur à l'instant de la séparation des contacts, comme on l'a expliqué précédemment. Dans l'exemple donné, la barre de torsion 2, ne fournit pas de couple additionnel pour des positions de l'arbre d'entraînement 8 situé au-delà de 20°. FIG. 3 shows a curve of the torque as a function of the angular position of the drive shaft. Curve 40 represents the additional torque from torsion bar 2. In accordance with FIG. 3, 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. Thus, 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. In the example given, torsion bar 2 does not provide additional torque for positions of the drive shaft 8 located beyond 20 °.
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 figure 3.  Curve 42 represents the torque provided by the coil spring contained in the housing 26 alone. In contrast to the torque provided by the torsion bar, the coil spring contained in the housing 26 provides a torque over the full range of angular position of the drive shaft 8. In other words, 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 in FIG.
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 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. As a result, the total energy stored in the Actuating device can be up to 50% lower than a solution without torsion bar.

Claims

REVENDICATIONS
1. Dispositif d' actionnement des contacts d'un disjoncteur à haute ou moyenne tension, comprenant au moins un contact mobile, un arbre d'entraînement rigide (8) qui entraîne le contact mobile, des moyens élastiques pour entraîner le contact mobile et une barre de torsion (2) pour entraîner l'arbre d'entraînement, la barre de torsion étant apte à appliquer un couple sur l'arbre d'entraînement pendant une première partie de l'ouverture des contacts, caractérisé en ce que la barre de torsion (2) est logé à l'intérieur de l'arbre d'entraînement (8), une première extrémité de la barre de torsion (2) étant liée en rotation à une bague (10), une seconde extrémité (6) de la barre de torsion (2) étant liée en rotation à l'arbre d'entraînement (8), le dispositif d ' actionnement comportant un seul arbre d'entraînement (8) et une seule barre de torsion (2) . 1. Device for actuating the contacts of a high or medium voltage circuit breaker, comprising at least one moving contact, a rigid drive shaft (8) which drives the moving contact, elastic means for driving the moving contact and a torsion bar (2) for driving the drive shaft, the torsion bar being adapted to apply a torque on the drive shaft during a first part of the opening of the contacts, characterized in that the bar of torsion (2) is housed inside the drive shaft (8), a first end of the torsion bar (2) being rotatably connected to a ring (10), a second end (6) of the torsion bar (2) being rotatably connected to the drive shaft (8), the actuating device comprising a single drive shaft (8) and a single torsion bar (2).
2. Dispositif d' actionnement selon la revendication 1, caractérisé en ce que les moyens élastiques sont constitués d'au moins un ressort hélicoïdal. 2. Actuating device according to claim 1, characterized in that the elastic means consist of at least one helical spring.
3. Dispositif d' actionnement selon la revendication3. Actuating device according to the claim
1 ou la revendication 2, caractérisé en ce qu'il comporte un élément à mouvement perdu qui est constitué de deux éléments de butée (14, 16) et de la dite bague (10), de deux pistons (18, 20) espacés angulairement l'un de l'autre et solidaires de la bague (10), les pistons (18 et 20) étant aptes à venir en butée contre les éléments de butée (14, 16) au cours de la rotation de l'arbre d'entraînement (8) . 1 or 2, characterized in that it comprises a lost motion element which consists of two abutment members (14, 16) and said ring (10), two pistons (18, 20) spaced angularly one of the other and integral with the ring (10), the pistons (18 and 20) being able to come abutting against the stop members (14, 16) during rotation of the drive shaft (8).
4. Dispositif d' actionnement selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comporte un levier (22) apte à exercer une traction sur une chaîne (30), ce qui comprime le ressort hélicoïdal . 4. Actuating device according to any one of claims 1 to 3, characterized in that it comprises a lever (22) adapted to exert traction on a chain (30), which compresses the coil spring.
EP13723429.0A 2012-04-26 2013-04-25 A contact actuating device for a circuit breaker comprising a torsion bar Active EP2842144B1 (en)

Applications Claiming Priority (2)

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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

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EP2842144A1 true EP2842144A1 (en) 2015-03-04
EP2842144B1 EP2842144B1 (en) 2016-06-08

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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)
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IN (1) IN2014MN01772A (en)
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KR20150006820A (en) 2015-01-19
CA2866397A1 (en) 2013-10-31
JP2015515106A (en) 2015-05-21
IN2014MN01772A (en) 2015-07-03
FR2990053A1 (en) 2013-11-01
PL2842144T3 (en) 2016-12-30
JP6382183B2 (en) 2018-08-29
EP2842144B1 (en) 2016-06-08
ES2590858T3 (en) 2016-11-23
CN104246945A (en) 2014-12-24
CN104246945B (en) 2016-11-09
US9466447B2 (en) 2016-10-11
US20150108092A1 (en) 2015-04-23
KR102052673B1 (en) 2019-12-06
HUE028855T2 (en) 2017-01-30
FR2990053B1 (en) 2015-01-30
WO2013160409A1 (en) 2013-10-31

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