EP0277851B1 - Control mechanism with a latching device for a three-position circuit breaker - Google Patents

Control mechanism with a latching device for a three-position circuit breaker Download PDF

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Publication number
EP0277851B1
EP0277851B1 EP88400048A EP88400048A EP0277851B1 EP 0277851 B1 EP0277851 B1 EP 0277851B1 EP 88400048 A EP88400048 A EP 88400048A EP 88400048 A EP88400048 A EP 88400048A EP 0277851 B1 EP0277851 B1 EP 0277851B1
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EP
European Patent Office
Prior art keywords
circuit breaker
transmission device
crankshaft
operating mechanism
crank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88400048A
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German (de)
French (fr)
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EP0277851A1 (en
Inventor
Robert Micoud
Michel Berne
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.)
Merlin Gerin SA
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Merlin Gerin SA
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Publication date
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Publication of EP0277851A1 publication Critical patent/EP0277851A1/en
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Publication of EP0277851B1 publication Critical patent/EP0277851B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3047—Power arrangements internal to the switch for operating the driving mechanism using spring motor adapted for operation of a three-position switch, e.g. on-off-earth

Definitions

  • a mechanism of the kind mentioned is described in French patent FR-A-2,500,222 and comprises a single spring associated with a toggle joint and a control crank.
  • Such a tumbler type mechanism is perfectly suitable for switches having average breaking performance, but is not suitable for devices of higher performance, in particular circuit breakers.
  • the object of the invention is to increase the power of a control mechanism, so that it can be used either in a fuse switch or in a circuit breaker.
  • the mechanism according to the invention is characterized in that the energy storage system comprises a first spring arranged between a first cleat for driving the transmission member and a crankshaft wedged on a shaft extending parallel to the axis of the transmission member and a second spring interposed between a second drive stopper of the transmission member and a grounding control crank in mechanical connection with said locking means and a pivoting retaining plate cooperates on the one hand with an opening control lock by means of a one-way locking, and on the other hand with the crankshaft by means of a first latch released during the opening stroke by the action release of the first spring, following the unlocking of the lock, and of a second hooking capable of occupying an active position of positive locking of the transmission member at the start of the co urse for closing the crankshaft and an inactive position for unlocking said member.
  • the mechanism according to the invention is of the hooking type particularly suitable for controlling three-position circuit breakers.
  • the manual closing control is operated by means of the crankshaft having a cam cooperating with two rollers angularly offset on the retaining plate to constitute the first and second hookings.
  • the retaining plate has a snap-in spout intended to lock the first drive cleat when the second latch is in the active position by the action of the crankshaft. This results in maximum compression of the first spring during the closing operation.
  • the kinematic chain further comprises a braking device made active during the opening stroke after separation of the contacts to ensure temporary blocking of the transmission member.
  • the transmission member advantageously has a roller capable of coming into engagement with a retractable lever in an intermediate position of the opening stroke, the braking being effected by means of a hydraulic damper.
  • Such a device is particularly advantageous when the arc is cut by magnetic blowing using a permanent magnet.
  • the latching type control mechanism 10 is used to actuate the movable assembly (not shown) of a three-phase circuit breaker with separable contacts, the assembly being housed in a medium-voltage electrical distribution cell.
  • the moving part of the circuit breaker can occupy three distinct stable positions, namely a position F for closing the contacts, an intermediate position O for opening and isolation after separation of the contacts, and a position T for earthing in which the start cable of each phase is electrically connected to earth by via the corresponding mobile contact of the circuit breaker.
  • the latching mechanism 10 is arranged between two plates 18, 20, parallel in metallic material and comprises two springs 12, 14, of compression, with energy accumulation, capable of cooperating with a transmission member 16 integral with the drive lever of the moving crew.
  • the lower spring 12 ensures the closing of the circuit breaker, while the upper spring 14 causes the opening and the earthing.
  • the transmission member 16 is mounted for rotation on a transverse axis 22 between three positions ( Figures 1 to 3) angularly offset corresponding to the three positions F, O and T of the circuit breaker.
  • the guide of the lower spring 12 is supported at one end on a first cleat 24 for driving the transmission member 16, and at the opposite end on a crankpin of a closing control crankshaft.
  • the upper spring guide is interposed between a second drive cleat for the transmission member and an anchor point located on a grounding control crank 34.
  • the crankshaft 28 is rotatably mounted on a shaft 36, and has a cam-shaped ridge 38 cooperating with two rollers 40, 42, fixed at predetermined locations on a retaining plate 44.
  • a locking crank 46 is pivotally mounted limited on an axis 48 to ensure the locking of the transmission member 16 in each of the positions F, O and T of Figures 1 to 3.
  • a roller 50 of the locking crank 46 is intended to stop the rotational movement of the 'transmission member 16 in the open position O ( Figure 2), and in the earthed position T ( Figure 3). Between the closed F positions ( Figure 1) and the open O positions ( Figure 2) of the mechanism 10, the locking crank 46 remains stationary in abutment against a stop 52 which also serves as a stop for the transmission member 16 when this the latter is in the closed F position ( Figure 1).
  • a connecting rod 54 is arranged with clearance between the crank 34 for earthing control, and the crank 46 for locking the transmission member 16, so as to allow the latter to move in rotation towards the earthing position T, when the crank 34 is actuated clockwise around its axis 35, from position O ( Figure 2) to position T ( Figure 3).
  • One end of the rod 54 has an oblong opening 56 in which is housed a crank pin 58 of the earthing crank 34.
  • the opposite end of the rod 54 carries a drive axis 60 capable of moving in a curvilinear groove 62 of the locking crank 46, when passing from the open position O to the earthed position T , and reciprocally.
  • the retaining plate 44 is pivotally mounted on an intermediate axis 64, and is equipped with a hooking spout 66 intended to cooperate with the first cleat 24 of the transmission member 16 during the manual closing stroke of the crankshaft 28
  • a lock 68 is mounted with limited rotation on an axis 70 and controls the opening of the circuit breaker by unlocking the retaining plate 44.
  • a return spring biases the lock 68 clockwise towards the locked position in which the retaining plate 44 is locked unidirectionally in rotation in the trigonometric direction.
  • the angular displacement of the latch 68 towards the unlocked position occurs in the trigonometric direction, either by means of an actuator 72 for automatic triggering controlled by a trigger, or by means of a button 74 for manual opening control.
  • the actuator 72 may be constituted by an electromagnetic relay, a striker of a fuse circuit breaker, and any other tripping auxiliary.
  • the lock 68 comprises a latching tab 76 which cooperates in the locked position with a roller 78 located on an extension of the retaining plate 44.
  • a braking system me designated by the general reference 80, comprises a retractable bent lever 82 cooperating via a driving lever 83 with a damper 84 of the hydraulic dashpot type for temporarily braking the transmission member 16 during the race opening of the mobile equipment.
  • the two levers 82, 83 are mounted with limited pivoting on the same axis 86, on which is also threaded a torsion spring 88 ( Figure 1) urging the lever 82 retractable clockwise, and allowing the closing of the mechanism 10.
  • a return spring (not shown) is integrated in the damper 84 to ensure the return of the retractable lever 82 in the middle active position (FIG. 1) after the thrust exerted by the roller 94 controlling the control member. transmission 16 in the intermediate position of the opening stroke.
  • the circuit breaker is opened by means of the automatic tripping actuator 72 or the manual control button 74, causing the latch 68 to pivot about the axis 70 in the counterclockwise direction and the unlocking of the retaining plate 44.
  • the arrows in FIG. 1 indicate the direction of movement of the moving parts during the opening command of the mechanism 10.
  • the reaction of the lower spring 12 on the crankpin 26 causes the crankshaft 28 to move in rotation in a clockwise direction, followed by the erasure of the first attachment 92 by pivoting of the retaining plate 44 in the trigonometric direction.
  • the lower spring 12 expands to the right, when the cam 38 of the crankshaft 28 slides on the roller 42, and the torque exerted by the lower spring 12 on the transmission member 16 gradually decreases.
  • the transmission member 16 begins to pivot counterclockwise, and is moved to the open position O.
  • Temporary blocking of the moving part of the circuit breaker by the braking device 80 occurs after the separation of the contacts, during phase I of extinction of the arc (see FIG. 4).
  • the length of the stroke AB of the moving assembly between the separation of the contacts, and the intervention of the braking device 80 is advantageously chosen in a range between 10 and 20 millimeters, when the circuit breaker is gaseous isolation and equipped with a magnetic blowing device by rotation of the arc by means of a permanent magnet.
  • the dielectric medium is restored during the BO race of phase II after extinction of the arc and neutralization of the braking device 80.
  • Figure 2 shows the mechanism 10 in the open position.
  • the crankshaft 28 has made a half-turn clockwise from position F, and the transmission member 16 is in stable abutment against the roller 50 of the locking crank 46.
  • the retaining plate 44 is again locked by the latch 68, and the position of the two locking cranks 46 and grounding 34 remained unchanged during the entire opening stroke.
  • the erasing of the hooking spout 66 takes place automatically when the cam 38 escapes from the roller 40.
  • the relaxation of the lower spring 12 to the left then causes the transmission member 16 to rotate clockwise, and the mechanism 10 returns to the closed position F ( Figure 1).
  • the roller 94 of the transmission member 16 causes the lever 82 to recede without intervention of the braking device 80.
  • the torsion spring 88 then returns the lever 82 to its active position, after passage of the roller 94 .
  • the earthing operation is carried out manually from from the open position O (FIG. 2) of the mechanism 10, by means of an operating member (not shown) rotating the earthing crank 34 a quarter of a turn clockwise (see arrow FT on figure 2).
  • the retraction of the connecting rod 54 to the right causes the locking crank 46 to tilt in a clockwise direction, allowing the pivoting member 16 to pivot in the direction of the transmission member 16 under the action of the upper spring 14.
  • FIG. 3 shows the earthing position T of the mechanism 10.
  • the crankshaft 28 and the retaining plate 44 have remained stationary and do not intervene during this maneuver between the opening positions O and earthing T.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Agricultural Machines (AREA)

Description

L'invention est relative à un mécanisme de commande d'un appareillage électrique, notamment d'un disjoncteur multipolaire ou d'un interrupteur associé à des fusibles incorporé dans une cellule électrique de distribution, en liaison avec des câbles de raccordement, l'équipage mobile du disjoncteur étant susceptible d'occuper trois positions distinctes stables, à savoir une première position de fermeture des contacts, une deuxième position intermédiaire d'ouverture des contacts, et une troisième position de mise à la terre dans laquelle les câbles de départ sont connectés électriquement à la terre par l'intermédiaire des contacts mobiles des phases correspondantes, la chaîne cinématique dudit mécanisme comportant :

  • un système élastique accumulateur d'énergie associé à un organe de transmission rotatif solidaire de l'équipage mobile,
  • des moyens de commande coopérant avec le système accumulateur d'énergie , pour actionner l'organe de transmission dans l'une des trois positions, la mise à la terre s'effectuant à partir de la deuxième position O intermédiaire,
  • et des moyens de blocage de l'organe de transmission dans chacune des trois positions du disjoncteur.
The invention relates to a mechanism for controlling electrical equipment, in particular a multipole circuit breaker or a switch associated with fuses incorporated in an electrical distribution cell, in connection with connection cables, the crew mobile of the circuit breaker being capable of occupying three distinct stable positions, namely a first position for closing the contacts, a second intermediate position for opening the contacts, and a third grounding position in which the outgoing cables are connected electrically grounded via the movable contacts of the corresponding phases, the kinematic chain of said mechanism comprising:
  • an elastic energy storage system associated with a rotary transmission member secured to the moving assembly,
  • control means cooperating with the energy storage system, to actuate the transmission member in one of the three positions, the earthing being effected from the second intermediate position O,
  • and means for blocking the transmission member in each of the three positions of the circuit breaker.

Un mécanisme du genre mentionné est décrit dans le brevet français FR-A-2 500 222 et comprend un ressort unique associé à une genouillère et à une manivelle de commande. Un tel mécanisme du type tumbler convient parfaitement pour des interrupteurs ayant des performances de coupure moyennes, mais n'est pas adapté pour des appareils de performances supérieures, notamment des disjoncteurs.A mechanism of the kind mentioned is described in French patent FR-A-2,500,222 and comprises a single spring associated with a toggle joint and a control crank. Such a tumbler type mechanism is perfectly suitable for switches having average breaking performance, but is not suitable for devices of higher performance, in particular circuit breakers.

L'objet de l'invention consiste à augmenter la puissance d'un mécanisme de commande, de manière à pouvoir l'utiliser indifféremment dans un interrupteur à fusible ou dans un disjoncteur.The object of the invention is to increase the power of a control mechanism, so that it can be used either in a fuse switch or in a circuit breaker.

Le mécanisme selon l'invention est caractérisé en ce que le système acccumulateur d'énergie comporte un premier ressort agencé entre un premier taquet d'entraînement de l'organe de transmission et un vilebrequin calé sur un arbre s'étendant parallèlement à l'axe de l'organe de transmission et un deuxième ressort intercalé entre un deuxième taquet d'entraînement de l'organe de transmission et une manivelle de commande de mise à la terre en liaison mécanique avec lesdits moyens de blocage et qu'une plaque de retenue pivotante coopère d'une part avec un verrou de commande d'ouverture par l'intermédiaire d'un verrouillage unidirectionnel, et d'autre part avec le vilebrequin au moyen d'un premier accrochage libéré lors de la course d'ouverture par l'action de détente du premier ressort, faisant suite au déverrouillage du verrou, et d'un deuxième accrochage susceptible d'occuper une position active de verrouillage positif de l'organe de transmission au début de la course de fermeture du vilebrequin et une position inactive de déverrouillage dudit organe.The mechanism according to the invention is characterized in that the energy storage system comprises a first spring arranged between a first cleat for driving the transmission member and a crankshaft wedged on a shaft extending parallel to the axis of the transmission member and a second spring interposed between a second drive stopper of the transmission member and a grounding control crank in mechanical connection with said locking means and a pivoting retaining plate cooperates on the one hand with an opening control lock by means of a one-way locking, and on the other hand with the crankshaft by means of a first latch released during the opening stroke by the action release of the first spring, following the unlocking of the lock, and of a second hooking capable of occupying an active position of positive locking of the transmission member at the start of the co urse for closing the crankshaft and an inactive position for unlocking said member.

Le mécanisme selon l'invention est du genre à accrochages particulièrement adapté pour la commande de disjoncteurs à trois positions.The mechanism according to the invention is of the hooking type particularly suitable for controlling three-position circuit breakers.

La commande manuelle de fermeture s'opère au moyen du vilebrequin ayant une came coopérant avec deux galets angulairement décalés sur la plaque de retenue pour constituer les premier et deuxième accrochages.The manual closing control is operated by means of the crankshaft having a cam cooperating with two rollers angularly offset on the retaining plate to constitute the first and second hookings.

La plaque de retenue comporte un bec d'encliquetage destiné à verrouiller le premier taquet d'entraînement lorsque le deuxième accrochage se trouve en position active par l'action du vilebrequin. Il en résulte une compression maximum du premier ressort lors de la manoeuvre de fermeture.The retaining plate has a snap-in spout intended to lock the first drive cleat when the second latch is in the active position by the action of the crankshaft. This results in maximum compression of the first spring during the closing operation.

La chaîne cinématique comprend de plus un dispositif de freinage rendu actif au cours de la course d'ouverture après séparation des contacts pour assurer un blocage temporaire de l'organe de transmission. L'organe de transmission est doté avantageusement d'un galet susceptible de venir en engagement avec un levier escamotable dans une position intermédiaire de la course d'ouverture, le freinage s'opérant au moyen d'un amortisseur hydraulique. Un tel dispositif est particulièrement intéressant lorsque la coupure de l'arc s'effectue par soufflage magnétique au moyen d'un aimant permanent.The kinematic chain further comprises a braking device made active during the opening stroke after separation of the contacts to ensure temporary blocking of the transmission member. The transmission member advantageously has a roller capable of coming into engagement with a retractable lever in an intermediate position of the opening stroke, the braking being effected by means of a hydraulic damper. Such a device is particularly advantageous when the arc is cut by magnetic blowing using a permanent magnet.

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

  • la figure 1 montre une vue en élévation du mécanisme selon l'invention, en position de fermeture du disjoncteur ;
  • les figures 2 et 3 sont des vues identiques à la figure 1, respectivement en position d'ouverture et de mise à la terre ;
  • la figure 4 représente le diagramme temporel de la course d'ouverture du disjoncteur avec la position intermédiaire de freinage.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention given by way of nonlimiting example and represented in the appended drawings, in which:
  • Figure 1 shows an elevational view of the mechanism according to the invention, in the closed position of the circuit breaker;
  • Figures 2 and 3 are views identical to Figure 1, respectively in the open position and grounding;
  • FIG. 4 represents the time diagram of the circuit breaker opening stroke with the intermediate braking position.

Sur les figures, le mécanisme 10 de commande du type à accrochage sert à actionner l'équipage mobile (non représenté) d'un disjoncteur triphasé à contacts séparables, l'ensemble étant logé dans une cellule électrique de distribution à moyenne tension. L'équipage mobile du disjoncteur peut occuper trois positions distinctes stables, à savoir une position F de fermeture des contacts, une position intermédiaire O d'ouverture et d'isolement après séparation des contacts, et une position T de mise à la terre dans laquelle le câble de départ de chaque phase est connecté électriquement à la terre par l'intermédiaire du contact mobile correspondant du disjoncteur.In the figures, the latching type control mechanism 10 is used to actuate the movable assembly (not shown) of a three-phase circuit breaker with separable contacts, the assembly being housed in a medium-voltage electrical distribution cell. The moving part of the circuit breaker can occupy three distinct stable positions, namely a position F for closing the contacts, an intermediate position O for opening and isolation after separation of the contacts, and a position T for earthing in which the start cable of each phase is electrically connected to earth by via the corresponding mobile contact of the circuit breaker.

Le mécanisme 10 à acccrochage est agencé entre deux platines 18, 20, parallèles en matériau métallique et comporte deux ressorts 12, 14, de compression, à accumulation d'énergie, susceptibles de coopérer avec un organe de transmission 16 solidaire du levier d'entraînement de l'équipage mobile. Le ressort inférieur 12 assure la fermeture du disjoncteur, tandis que le ressort supérieur 14 provoque l'ouverture et la mise à la terre. L'organe de transmission 16 est monté à rotation sur un axe 22 transversal entre trois positions (figures 1 à 3) angulairement décalées correspondant aux trois positions F, O et T du disjoncteur. Le guide du ressort inférieur 12 prend appui à l'une des extrémités sur un premier taquet 24 d'entraînement de l'organe de transmission 16, et à l'extrémité opposée sur un maneton d'un vilebrequin de commande de fermeture. Le guide du ressort supérieur est intercalé entre un deuxième taquet d'entraînement de l'organe de transmission et un point d'ancrage situé sur une manivelle 34 de commande de mise à la terre.The latching mechanism 10 is arranged between two plates 18, 20, parallel in metallic material and comprises two springs 12, 14, of compression, with energy accumulation, capable of cooperating with a transmission member 16 integral with the drive lever of the moving crew. The lower spring 12 ensures the closing of the circuit breaker, while the upper spring 14 causes the opening and the earthing. The transmission member 16 is mounted for rotation on a transverse axis 22 between three positions (Figures 1 to 3) angularly offset corresponding to the three positions F, O and T of the circuit breaker. The guide of the lower spring 12 is supported at one end on a first cleat 24 for driving the transmission member 16, and at the opposite end on a crankpin of a closing control crankshaft. The upper spring guide is interposed between a second drive cleat for the transmission member and an anchor point located on a grounding control crank 34.

Le vilebrequin 28 est monté à rotation sur un arbre 36, et présente une arête en forme de came 38 coopérant avec deux galets 40, 42, fixés à des endroits prédéterminés sur une plaque de retenue 44. Une manivelle 46 de verrouillage est montée à pivotement limité sur un axe 48 pour assurer le blocage de l'organe de transmission 16 dans chacune des positions F, O et T des figures 1 à 3. Un galet 50 de la manivelle de verrouillage 46 est destiné à stopper le mouvement de rotation de l'organe de transmission 16 dans la position O d'ouverture (figure 2), et dans la position T de mise à la terre (figure 3). Entre les positions F de fermeture (figure 1) et O d'ouverture (figure 2) du mécanisme 10, la manivelle de verrouillage 46 reste immobile en appui contre un arrêt 52 qui sert également de butée à l'organe de transmission 16 lorsque ce dernier se trouve en position F de fermeture (figure 1).The crankshaft 28 is rotatably mounted on a shaft 36, and has a cam-shaped ridge 38 cooperating with two rollers 40, 42, fixed at predetermined locations on a retaining plate 44. A locking crank 46 is pivotally mounted limited on an axis 48 to ensure the locking of the transmission member 16 in each of the positions F, O and T of Figures 1 to 3. A roller 50 of the locking crank 46 is intended to stop the rotational movement of the 'transmission member 16 in the open position O (Figure 2), and in the earthed position T (Figure 3). Between the closed F positions (Figure 1) and the open O positions (Figure 2) of the mechanism 10, the locking crank 46 remains stationary in abutment against a stop 52 which also serves as a stop for the transmission member 16 when this the latter is in the closed F position (Figure 1).

Une tringle de liaison 54 est agencée avec jeu entre la manivelle 34 de commande de mise à la terre, et la manivelle 46 de verrouillage de l'organe de transmission 16, de manière à autoriser le déplacement en rotation de ce dernier vers la position T de mise à la terre, lorsque la manivelle 34 est actionnée dans le sens horaire autour de son axe 35, à partir de la position O (figure 2) vers la position T (figure 3). L'une des extrémités de la tringle 54 est dotée d'une ouverture 56 oblongue dans laquelle est logé un maneton 58 de la manivelle 34 de mise à la terre. L'extrémité opposée de la tringle 54 porte un axe 60 d'entraînement susceptible de se déplacer dans une rainure 62 curviligne de la manivelle 46 de verrouillage, lors du passage de la position O d'ouverture vers la position T de mise à la terre, et réciproquement.A connecting rod 54 is arranged with clearance between the crank 34 for earthing control, and the crank 46 for locking the transmission member 16, so as to allow the latter to move in rotation towards the earthing position T, when the crank 34 is actuated clockwise around its axis 35, from position O (Figure 2) to position T (Figure 3). One end of the rod 54 has an oblong opening 56 in which is housed a crank pin 58 of the earthing crank 34. The opposite end of the rod 54 carries a drive axis 60 capable of moving in a curvilinear groove 62 of the locking crank 46, when passing from the open position O to the earthed position T , and reciprocally.

La plaque de retenue 44 est montée à pivotement sur un axe 64 intermédiaire, et est équipée d'un bec d'accrochage 66 destiné à coopérer avec le premier taquet 24 de l'organe de transmission 16 pendant la course de fermeture manuelle du vilebrequin 28. Un verrou 68 est monté à rotation limité sur un axe 70 et pilote l'ouverture du disjoncteur par déverrouillage de la plaque de retenue 44. Un ressort de rappel (non représenté) sollicite le verrou 68 dans le sens horaire vers la position verrouillée dans laquelle la plaque de retenue 44 est bloquée unidirectionnellement en rotation dans le sens trigonométrique. Le déplacement angulaire du verrou 68 vers la position déverrouillée intervient dans le sens trigonométrique, soit au moyen d'un actionneur 72 de déclenchement automatique piloté par un déclencheur, soit au moyen d'un bouton 74 de commande manuelle d'ouverture. L'actionneur 72 peut être constitué par un relais électromagnétique, un percuteur d'un coupe-circuit à fusible, et tout autre auxiliaire de déclenchement. Le verrou 68 comporte une patte 76 d'encliquetage qui coopère en position verrouillé avec un galet 78 situé sur une extension de la plaque de retenue 44.The retaining plate 44 is pivotally mounted on an intermediate axis 64, and is equipped with a hooking spout 66 intended to cooperate with the first cleat 24 of the transmission member 16 during the manual closing stroke of the crankshaft 28 A lock 68 is mounted with limited rotation on an axis 70 and controls the opening of the circuit breaker by unlocking the retaining plate 44. A return spring (not shown) biases the lock 68 clockwise towards the locked position in which the retaining plate 44 is locked unidirectionally in rotation in the trigonometric direction. The angular displacement of the latch 68 towards the unlocked position occurs in the trigonometric direction, either by means of an actuator 72 for automatic triggering controlled by a trigger, or by means of a button 74 for manual opening control. The actuator 72 may be constituted by an electromagnetic relay, a striker of a fuse circuit breaker, and any other tripping auxiliary. The lock 68 comprises a latching tab 76 which cooperates in the locked position with a roller 78 located on an extension of the retaining plate 44.

L'axe 64 de pivotement de la plaque de retenue 44 se trouve entre l'organe de transmission 16, et le plan passant par l'arbre 36 du vilebrequin 28, et l'axe 35 de la manivelle 34 de mise à la terre. Un système me de freinage, désigné par le repère général 80, comporte un levier 82 coudé escamotable coopérant par l'intermédiaire d'un levier entraîneur 83 avec un amortisseur 84 du type dashpot hydraulique pour freiner temporairement l'organe de transmission 16 durant la course d'ouverture de l'équipage mobile. Les deux leviers 82, 83, sont montés à pivotement limité sur le même axe 86, sur lequel est enfilé d'autre part un ressort de torsion 88 (figure 1) sollicitant le levier 82 escamotable dans le sens horaire, et autorisant la fermeture du mécanisme 10. Un ressort de rappel (non représenté) est intégré dans l'amortisseur 84 pour assurer le retour du levier 82 escamotable dans la position active médiane (figure 1) après la poussée exercée par le galet 94 de commande de l'organe de transmission 16 dans la position intermédiaire de la course d'ouverture.The pivot axis 64 of the retaining plate 44 is located between the transmission member 16, and the plane passing through the shaft 36 of the crankshaft 28, and the axis 35 of the earthing crank 34. A braking system me, designated by the general reference 80, comprises a retractable bent lever 82 cooperating via a driving lever 83 with a damper 84 of the hydraulic dashpot type for temporarily braking the transmission member 16 during the race opening of the mobile equipment. The two levers 82, 83, are mounted with limited pivoting on the same axis 86, on which is also threaded a torsion spring 88 (Figure 1) urging the lever 82 retractable clockwise, and allowing the closing of the mechanism 10. A return spring (not shown) is integrated in the damper 84 to ensure the return of the retractable lever 82 in the middle active position (FIG. 1) after the thrust exerted by the roller 94 controlling the control member. transmission 16 in the intermediate position of the opening stroke.

Le fonctionnement du mécanisme 10 de commande du disjoncteur à trois positions est le suivant :

  • En position F de fermeture du mécanisme 10, représentée sur la figure 1, l'organe de transmission 16 se trouve en butée contre l'arrêt 52, et y est maintenu de manière stable par la pression du ressort inférieur 12 sur le premier taquet 24 d'entraînement. La patte d'encliquetage 76 du verrou 68 est en position verrouillée sur le galet 78, et empêche toute rotation de la plaque de retenue 44 dans le sens trigonométrique. Le couple exercé sur l'organe de transmission 16 par le ressort supérieur 14 est négligeable par rapport à celui engendré par le ressort inférieur 12, et le vilebrequin est intercalé entre les deux galets 40, 42. L'engagement du vilebrequin 28 contre le galet 42 de la plaque de retenue 44 verrouillée constitue un premier accrochage 92, qui devra être libéré pour l'ouverture du mécanisme 10.
The operation of the mechanism 10 for controlling the three-position circuit breaker is as follows:
  • In the closed position F of the mechanism 10, shown in FIG. 1, the transmission member 16 is in abutment against the stop 52, and is held there stably by the pressure of the lower spring 12 on the first cleat 24 drive. The latching tab 76 of the lock 68 is in the locked position on the roller 78, and prevents any rotation of the retaining plate 44 in the counterclockwise direction. The torque exerted on the transmission member 16 by the upper spring 14 is negligible compared to that generated by the lower spring 12, and the crankshaft is interposed between the two rollers 40, 42. The engagement of the crankshaft 28 against the roller 42 of the locked retaining plate 44 constitutes a first attachment 92, which must be released for the opening of the mechanism 10.

L'ouverture du disjoncteur s'effectue au moyen de l'actionneur 72 de déclenchement automatique ou du bouton 74 de commande manuelle, provoquant le pivotement du verrou 68 autour de l'axe 70 dans le sens trigonométrique et le déverrouillage de la plaque de retenue 44. Les flèches sur la figure 1 indiquent le sens de déplacement des pièces en mouvement au cours de la commande d'ouverture du mécanisme 10. La réaction du ressort inférieur 12 sur le maneton 26 provoque le déplacement en rotation du vilebrequin 28 dans le sens des aiguilles d'une montre, suivi de l'effacement du premier accrochage 92 par pivotement de la plaque de retenue 44 dans le sens trigonométrique. Le ressort inférieur 12 se détend vers la droite, lorsque la came 38 du vilebrequin 28 glisse sur le galet 42, et le couple exercé par le ressort inférieur 12 sur l'organe de transmission 16 diminue progressivement. Lorsque le couple du ressort supérieur 14 l'emporte sur celui du ressort inférieur 12, l'organe de transmission 16 commence à pivoter dans le sens trigonométrique, et est déplacé vers la position O d'ouverture.The circuit breaker is opened by means of the automatic tripping actuator 72 or the manual control button 74, causing the latch 68 to pivot about the axis 70 in the counterclockwise direction and the unlocking of the retaining plate 44. The arrows in FIG. 1 indicate the direction of movement of the moving parts during the opening command of the mechanism 10. The reaction of the lower spring 12 on the crankpin 26 causes the crankshaft 28 to move in rotation in a clockwise direction, followed by the erasure of the first attachment 92 by pivoting of the retaining plate 44 in the trigonometric direction. The lower spring 12 expands to the right, when the cam 38 of the crankshaft 28 slides on the roller 42, and the torque exerted by the lower spring 12 on the transmission member 16 gradually decreases. When the torque of the upper spring 14 outweighs that of the lower spring 12, the transmission member 16 begins to pivot counterclockwise, and is moved to the open position O.

Pendant la course d'ouverture de l'organe de transmission 16, le galet 94 (voir en pointillé sur figure 1) vient en contact avec le levier 82 d'actionnement du dispositif de freinage 80. La réaction de l'amortisseur 84 sur le levier 82 arrête temporairement le déplacement en rotation de l'organe de transmission 16 dans une position intermédiaire, jusqu'à l'échappement du galet 94. L'organe de transmission 16 redevient alors libre, et la détente du ressort supérieur 14 l'entraîne vers la position O d'ouverture (figure 2).During the opening stroke of the transmission member 16, the roller 94 (see dotted line in FIG. 1) comes into contact with the lever 82 for actuating the braking device 80. The reaction of the damper 84 on the lever 82 temporarily stops the rotational movement of the transmission member 16 in an intermediate position, until the roller 94 escapes. The transmission member 16 then becomes free again, and the relaxation of the upper spring 14 drives it towards the open position O (figure 2).

Le blocage temporaire de l'équipage mobile du disjoncteur par le dispositif de freinage 80 intervient après la séparation des contacts, pendant la phase I d'extinction de l'arc (voir figure 4). La longueur de la course AB de l'équipage mobile entre la séparation des contacts, et l'intervention du dispositif de freinage 80 est avantageusement choisie dans une fourchette comprise entre 10 et 20 millimètres, lorsque le disjoncteur est à isolement gazeux et équipé d'un dispositif de soufflage magnétique par rotation de l'arc au moyen d'un aimant permanent. Le rétablissement du milieu diélectrique s'opère pendant la course BO de la phase II après extinction de l'arc et neutralisation du dispositif de freinage 80.Temporary blocking of the moving part of the circuit breaker by the braking device 80 occurs after the separation of the contacts, during phase I of extinction of the arc (see FIG. 4). The length of the stroke AB of the moving assembly between the separation of the contacts, and the intervention of the braking device 80 is advantageously chosen in a range between 10 and 20 millimeters, when the circuit breaker is gaseous isolation and equipped with a magnetic blowing device by rotation of the arc by means of a permanent magnet. The dielectric medium is restored during the BO race of phase II after extinction of the arc and neutralization of the braking device 80.

La figure 2 représente le mécanisme 10 en position d'ouverture. Le vilebrequin 28 a effectué depuis la position F un demi-tour dans le sens horaire, et l'organe de transmission 16 se trouve en butée stable contre le galet 50 de la manivelle de verrouillage 46. La plaque de retenue 44 est à nouveau verrouillée par le verrou 68, et la position des deux manivelles de verrouillage 46 et de mise à la terre 34 est demeurée inchangée pendant la totalité de la course d'ouverture.Figure 2 shows the mechanism 10 in the open position. The crankshaft 28 has made a half-turn clockwise from position F, and the transmission member 16 is in stable abutment against the roller 50 of the locking crank 46. The retaining plate 44 is again locked by the latch 68, and the position of the two locking cranks 46 and grounding 34 remained unchanged during the entire opening stroke.

La refermeture du disjoncteur à partir de la position O (figure 2) vers la position F (figure 1) intervient manuellement après engagement d'un levier de manoeuvre (non représenté) sur l'arbre 36, entraînant la rotation du vilebrequin 28 dans le sens horaire (voir flèche F sur figure 2). La venue en butée du vilebrequin 28 contre le galet 40 constitue un deuxième accrochage 100 provoquant un pivotement de même sens de la plaque de retenue 44, de manière à assurer un verrouillage positif unidirectionnel de l'organe de transmission 16 par engagement du bec d'accrochage 66 avec le premier taquet 24. La présence de ce verrouillage positif (voir pointillé) 44 persiste pendant toute la course de glissement de la came 38 sur le galet 40, et empêche toute fermeture du disjoncteur. Le ressort inférieur 12 est comprimé au maximum durant cette phase de verrouillage positif. L'effacement du bec d'accrochage 66 s'opère automatiquement lorsque la came 38 échappe au galet 40. La détente du ressort inférieur 12 vers la gauche provoque ensuite la rotation de l'organe de transmission 16 dans le sens horaire, et le mécanisme 10 revient dans la position F de fermeture (figure 1). Durant cette course de fermeture, le galet 94 de l'organe de transmission 16 provoque le recul du levier 82 sans intervention du dispositif de freinage 80. Le ressort de torsion 88 remet ensuite le levier 82 dans sa position active, après passage du galet 94.The reclosing of the circuit breaker from position O (Figure 2) to position F (Figure 1) occurs manually after engagement of an operating lever (not shown) on the shaft 36, causing the rotation of the crankshaft 28 in the clockwise (see arrow F on figure 2). The coming into abutment of the crankshaft 28 against the roller 40 constitutes a second attachment 100 causing a pivoting in the same direction of the retaining plate 44, so as to ensure a positive unidirectional locking of the transmission member 16 by engagement of the spout hooking 66 with the first cleat 24. The presence of this positive locking (see dotted line) 44 persists throughout the sliding stroke of the cam 38 on the roller 40, and prevents any closing of the circuit breaker. The lower spring 12 is compressed to the maximum during this positive locking phase. The erasing of the hooking spout 66 takes place automatically when the cam 38 escapes from the roller 40. The relaxation of the lower spring 12 to the left then causes the transmission member 16 to rotate clockwise, and the mechanism 10 returns to the closed position F (Figure 1). During this closing stroke, the roller 94 of the transmission member 16 causes the lever 82 to recede without intervention of the braking device 80. The torsion spring 88 then returns the lever 82 to its active position, after passage of the roller 94 .

L'opération de mise à la terre s'effectue manuellement à partir de la position O d'ouverture (figure 2) du mécanisme 10, au moyen d'un organe de manoeuvre (non représenté) faisant pivoter la manivelle 34 de mise à la terre d'un quart de tour dans le sens horaire (voir flèche FT sur figure 2). Le recul de la tringle de liaison 54 vers la droite provoque le basculement de la manivelle de verrouillage 46 dans le sens horaire, autorisant le pivotement dans le sens trigonométrique de l'organe de transmission 16 sous l'action du ressort supérieur 14. La figure 3 montre la position T de mise à la terre du mécanisme 10. Le vilebrequin 28 et la plaque de retenue 44 sont restés immobiles et n'interviennent pas durant cette manoeuvre entre les positions d'ouverture O et de mise à la terre T.The earthing operation is carried out manually from from the open position O (FIG. 2) of the mechanism 10, by means of an operating member (not shown) rotating the earthing crank 34 a quarter of a turn clockwise (see arrow FT on figure 2). The retraction of the connecting rod 54 to the right causes the locking crank 46 to tilt in a clockwise direction, allowing the pivoting member 16 to pivot in the direction of the transmission member 16 under the action of the upper spring 14. FIG. 3 shows the earthing position T of the mechanism 10. The crankshaft 28 and the retaining plate 44 have remained stationary and do not intervene during this maneuver between the opening positions O and earthing T.

Le retour du mécanisme 10 vers la position O d'ouverture de la figure 2, est opéré manuellement par un mouvement inverse de la manivelle 34 (voir flèche OT de la figure 3).The return of the mechanism 10 to the open position O in FIG. 2 is operated manually by a reverse movement of the crank 34 (see arrow OT in FIG. 3).

Claims (7)

1. An operating mechanism of an electrical switchgear device, especially a multipole circuit breaker or a fuse-switch, incorporated in an electrical distribution cubicle, connected by means of connecting cables, the movable assembly of the circuit breaker being able to occupy three distinct stable positions, namely a first position F in which the contacts are closed, a second intermediate position O in which the contacts are open, and a third earthed position T in which the outgoing cables are electrically earthed by means of the movable contacts of the corresponding phases, the kinematic transmission system of said mechanism (10) comprising :
- an elastic energy storage system (12, 14), associated with a rotary transmission device (16) securedly united to the movable assembly,
- operating means (28, 68, 72, 74, 34) operating in conjunction with the energy storage system (12, 14) to actuate the transmission device (16) in one of the three positions, earthing being accomplished from the second intermediate position O,
- and blocking means (46, 50, 52) of the transmission device (16) in each of the three positions F, O, T, of the circuit breaker, characterized in that the energy storage system comprises a first spring (12) being arranged between a first drive pin (24) of the transmission device (16), and a crankshaft (28) wedged onto a shaft (36) extending parallel to the spindle (22) of the transmission device (16), and a second spring (14) of the energy storage system being fitted between a second drive pin (30) of the transmission device (16) and an earthing control crank (34) mechanically connected to said blocking means, and that a pivoting retaining plate (44) cooperates on the one hand with an opening control lock (68) by means of a unidirectional locking (76, 78), and on the other hand with the crankshaft (28) by means of a first latching (92) being released during the opening travel by the expansion action of the first spring (12), subsequent to the lock (68) being released, and of a second latching (100) being capable of occupying an active positive locking position of the transmission device (16) at the beginning of the closing travel of the crankshaft (28), and an inactive unlocking position of said device (16).
2. An operating mechanism of a circuit breaker according to claim 1, characterized in that the retaining plate (44) is mounted with limited pivoting on a spindle (64) arranged inside a quadrilateral whose corners correspond to the locations of the spindle (70) of the lock (68), the spindle (35) of the earthing control crank (34), the shaft (36) of the crankshaft (38), and the pivoting spindle (22) of the transmission device (16).
3. An operating mechanism of a circuit breaker according to claim 1 or 2, characterized in that the crankshaft (28) is provided with a control cam (38) cooperating with two rollers (40, 42) angularly offset on the retaining plate (44) to constitute said first and second latchings (92, 100).
4. An operating mechanism of a circuit breaker according to claim 1, 2 or 3, characterized in that the retaining plate (44) comprises a latching nose (66) to lock the first drive pin (24), when the second latching (100) is in the active position due to the action of the crankshaft (28).
5. An operating mechanism of a circuit breaker according to one of the claims 1 to 4, characterized in that the cinematic chain comprises further a braking device (80) rendered active during the opening travel after separation of the contacts to temporarily block the transmission device (16), and that said opening control lock (68) is controlled either by an automatic trip actuator (72) or by a manual control button (74).
6. An operating mechanism of a circuit breaker according to claim 5, characterized in that the braking device (80) is provided with a retractable lever (82) cooperating with a hydraulic damper (84), and that a transmission device (16) comprises a roller (94) designed to come into engagement with said lever (82) in an intermediate position of the opening travel of said device (16).
7. An operating mechanism of a circuit breaker according to one of claims 1 to 6, characterized in that the breaking means of the transmission device (16) comprise, in each of the three positions F, O and T of the circuit breaker, a locking crank (46) connected with clearance to the earthing control crank (34) by means of a connecting rod (54) capable of actuating said locking crank between a first locking position in the closed position F and the open position O of the mechanism, and a second blocking position in the earthed position T.
EP88400048A 1987-01-21 1988-01-11 Control mechanism with a latching device for a three-position circuit breaker Expired - Lifetime EP0277851B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8700750 1987-01-21
FR8700750A FR2609839B1 (en) 1987-01-21 1987-01-21 MECHANISM FOR HANGING THE CONTROL OF A THREE-POSITION CIRCUIT BREAKER

Publications (2)

Publication Number Publication Date
EP0277851A1 EP0277851A1 (en) 1988-08-10
EP0277851B1 true EP0277851B1 (en) 1992-04-08

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EP88400048A Expired - Lifetime EP0277851B1 (en) 1987-01-21 1988-01-11 Control mechanism with a latching device for a three-position circuit breaker

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US (1) US4821008A (en)
EP (1) EP0277851B1 (en)
BR (1) BR8800205A (en)
CA (1) CA1303655C (en)
DE (1) DE3869801D1 (en)
ES (1) ES2031609T3 (en)
FR (1) FR2609839B1 (en)
IN (1) IN170185B (en)
PT (1) PT86580B (en)
TR (1) TR23153A (en)
YU (1) YU47463B (en)

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US5424701A (en) * 1994-02-25 1995-06-13 General Electric Operating mechanism for high ampere-rated circuit breakers
FR2770680B1 (en) * 1997-11-06 1999-12-03 Schneider Electric Sa CONNECTING ROD MECHANISM FOR A THREE-POSITION SWITCH
FR2794278B1 (en) * 1999-05-28 2001-08-10 Alstom QUICK CONTROL DEVICE FOR A HIGH VOLTAGE CONNECTION APPARATUS, IN PARTICULAR AN EARTH ISOLATOR
KR100325408B1 (en) * 1999-10-26 2002-03-04 이종수 Contact point closing/open apparatus for circuit breaker
DE10061164C1 (en) * 2000-11-30 2002-08-22 Siemens Ag switch drive
FR2916300B1 (en) * 2007-05-15 2009-07-10 Schneider Electric Ind Sas DEVICE FOR CONTROLLING THE CONTACT OR NON-CONTACT OF TWO PARTS AND AN ELECTRIC APPARATUS COMPRISING SUCH A DEVICE
FR2925210B1 (en) * 2007-12-17 2010-01-15 Areva T&D Ag COMPACT CONTROL FOR MEDIUM AND HIGH VOLTAGE ELECTRICAL EQUIPMENT
US8093964B2 (en) * 2008-12-29 2012-01-10 Schneider Electric USA, Inc. Add-on trip module for multi-pole circuit breaker
US8093965B2 (en) * 2008-12-03 2012-01-10 Schneider Electric USA, Inc. Add-on trip module for multi-pole circuit breaker
US8063328B2 (en) * 2009-09-16 2011-11-22 Eaton Corporation Electrical switching apparatus and charging assembly therefor
CN101826705B (en) * 2010-05-06 2012-04-04 纪元电气集团有限公司 High-voltage cabinet stroke switch control device
CN103337405B (en) * 2013-06-04 2015-06-24 宁波舜利高压开关科技有限公司 A three-position mechanism with reclosing and grounding closing functions and an operation method thereof
CN104658805B (en) * 2015-02-04 2016-10-05 宁波舜利高压开关科技有限公司 The most rotary three position mechanism of dual operation axle
CN105006410B (en) * 2015-07-13 2018-03-30 国家电网公司 A kind of long-range drawing release unit on switch cubicle
CN105513848B (en) * 2016-01-12 2018-05-08 博纳方格（天津）电气设备有限公司 Spring operating mechanism for breaker
EP3928340A1 (en) * 2019-03-29 2021-12-29 Siemens Aktiengesellschaft Spring system for a drive system comprising a coupling, spring system comprising a coupling, drive system comprising a coupling and a spring system and switchgear comprising such a drive system
CN114823207B (en) * 2022-03-18 2023-06-09 珠海优特电力科技股份有限公司 Operating device of three-station disconnecting link switch and three-station disconnecting link switch

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IT1137121B (en) * 1981-04-02 1986-09-03 Sace Spa ELECTRIC SWITCH, PARTICULARLY CURRENT LIMITER

Also Published As

Publication number Publication date
FR2609839A1 (en) 1988-07-22
EP0277851A1 (en) 1988-08-10
DE3869801D1 (en) 1992-05-14
CA1303655C (en) 1992-06-16
IN170185B (en) 1992-02-22
US4821008A (en) 1989-04-11
PT86580B (en) 1993-12-31
PT86580A (en) 1989-01-30
FR2609839B1 (en) 1989-04-07
BR8800205A (en) 1988-08-30
TR23153A (en) 1989-04-18
YU47463B (en) 1995-10-03
ES2031609T3 (en) 1992-12-16
YU7888A (en) 1990-08-31

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