EP0452230B1 - Driving mechanism for circuit breaker - Google Patents

Driving mechanism for circuit breaker Download PDF

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Publication number
EP0452230B1
EP0452230B1 EP91420108A EP91420108A EP0452230B1 EP 0452230 B1 EP0452230 B1 EP 0452230B1 EP 91420108 A EP91420108 A EP 91420108A EP 91420108 A EP91420108 A EP 91420108A EP 0452230 B1 EP0452230 B1 EP 0452230B1
Authority
EP
European Patent Office
Prior art keywords
indicator
arm
handle
lever
nose
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
EP91420108A
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German (de)
French (fr)
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EP0452230A1 (en
Inventor
Michel Lazareth
Noel Lecorre
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
Original Assignee
Merlin Gerin SA
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0452230A1 publication Critical patent/EP0452230A1/en
Application granted granted Critical
Publication of EP0452230B1 publication Critical patent/EP0452230B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/501—Means for breaking welded contacts; Indicating contact welding or other malfunction of the circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure

Definitions

  • the invention relates to a control mechanism for an electrical circuit breaker with an insulating housing containing a pair of fixed and movable contacts, said movable contact being carried by a contact arm actuated by the mechanism, which comprises a lever pivotally mounted on an axis. and movable in an orifice of the housing between two extreme positions F for closing and O for opening, a transmission link coupled to the lever to form a toggle joint, a breakable mechanical connection between the link and a support lever for the contact arm, a trip lever for locking and unlocking the mechanical connection, and a mechanical indicator of the state of the circuit breaker having an indicator light capable of occupying an active position visible from the outside in the position O of opening of the lever.
  • Such a mechanism is described in document EP-A-0 342133, comprising a device for indicating contact soldering, and for apparent signaling of the opening of the circuit breaker.
  • the indicator is fixed directly on the periphery of the joystick base, and moves continuously with the latter. The positioning of the indicator nevertheless depends on the test force exerted on the lever in the event of contact welding. Depending on the elasticity of the mechanism members, a forced actuation of the lever can make a portion of the indicator visible, causing risks of errors on the actual state of the circuit breaker contacts.
  • the object of the invention is to improve the reliability of a mechanical indicator of the state of a circuit breaker by making it insensitive to the test force exerted on the handle.
  • the mechanism according to the invention is characterized in that the indicator comprises a bistable lever mounted for free rotation on the axis of the lever, and cooperating with a nose of the lever support intended to lock the indicator and make it invisible in a stable inactive position, when the lever is actuated from the closed position F to the open position O in the event of soldering of the contacts.
  • the bistable arrangement of the indicator makes it possible to safely recognize the open or closed state of the contacts.
  • the indicator is only visible in the active position, corresponding to the opening position of the handle after separation of the contacts.
  • the indicator is invisible in the inactive position when the contacts are closed normally or by accidental welding.
  • the indicator is insensitive to the test force exerted on the lever, given its cooperation with the support arm of the contact arm.
  • the indicator lever includes a first signaling arm on which the indicator is arranged, and a second control arm cooperating with the nose, the two arms being angularly offset from each other by a predetermined angle, centered on the axis of the joystick.
  • the indicator is returned to the inactive position by means of the action of the lever on the first arm.
  • the mechanism is equipped with a mechanical device for locking the handle in an intermediate position S in the event of soldering of the contacts. This results in a fully visible cut-off function with contact position indicator.
  • the mechanism 10 is housed in the insulating case 12 of the circuit breaker, and is intended to actuate a movable contact arm 13 having a contact piece 14 cooperating with a fixed contact 16.
  • the mechanism 10 comprises a lever 18 pivotally coupled to a transmission link 20 to form a toggle switch 22, and a plate 24 mounted with limited rotation on a pivot 26 between a closed position and an open position of the contacts 14, 16.
  • On the pivot 26 is threaded a support lever 28 insulating the arm from this contact 13.
  • a mechanical connection 30 with a breakable connecting rod is formed by a second toggle joint having a hooking hook 32 pivotally mounted on an axis 34 of the plate 24 while being articulated to the connecting rod 20 of transmission.
  • a trigger lever 36 is mounted on an axis 38 of the plate 24 and cooperates with the retaining spout of the hook 32 to ensure the locking and unlocking of the mechanical link 30.
  • the lever 18 projects from an orifice 40 in the housing 12 and is pivotally mounted on an axis 42 between two extreme positions F and 0 corresponding respectively to the closing and opening of the contacts 14,16.
  • the mechanism 10 is provided with a mechanical indicator 50 formed by a bistable lever (fig. 1 to 4) mounted for free rotation on the axis 42 of the lever 18.
  • a return spring (not shown) requests the indicator 50 anticlockwise corresponding to the direction of opening of the lever 18.
  • the indicator 50 comprises a first signaling arm 52, the side face of which carries a colored light 54 and a second arm 54 ′ of control equipped with a step 55 capable of cooperating with a nose 56 of the support lever 28.
  • the first and second arms 52, 54 ′ are angularly offset from one another by an acute angle centered on the axis 42 of the lever 18.
  • the two opposite flanks of the second arm 54 ′ come into engagement with a pair of end-of-travel stops 58.60, integral with the housing 12 to delimit the angular travel of the indicator 50.
  • the indicator 50 is in a first stable inactive position, in which the indicator 54 of the first arm 52 remains invisible from the outside.
  • the contact arm 13 and its support lever 28 remain fixed, and the nose 56 blocks the step 55 of the second arm 54 ′ to maintain the indicator 50 in the first stable position, when the operator attempts to actuate the lever 18 towards the open position.
  • the indicator 54 remains invisible when the lever 18 is between the intermediate position S and the open position O.
  • the lever 18 In the event of non-welding of the contacts 14, 16 following a manual opening or an automatic triggering of the mechanism 10, the lever 18 is moved to the left position 0, and the nose 56 of the support lever 28 no longer interferes with the step 55 of the second arm 54 ′.
  • the absence of blocking of the nose 56 on the second arm 54 ′ and of the boss 62 of the lever 18 on the first arm 52 allows the pivoting of the indicator 50 in the anti-clockwise direction towards the second active position. stable (fig. 4) under the action of the return spring.
  • the second arm 54 ′ is in abutment against the second stop 60, and the appearance of the indicator 54 outside the orifice 40 signals the effective opening of the contacts 14, 16.
  • the reclosing of the circuit breaker is effected by displacement of the handle 18 from position 0 to position F.
  • the boss 62 of the handle 18 pushes the first arm 52 in the direction of the needles d 'a watch, and automatically returns the indicator 50 to the first stable position against the return force of the spring.
  • the indicator 54 can occupy two stable positions, one of which corresponding to the visible state indicates the separation of the contacts 14,16, and the other of which corresponding to the invisible state, signals the normal or welded closure of the contacts 14.16.
  • the display function is performed by a separate part of the handle 18. By its cooperation with the nose 56 of the support lever 28, the bistable indicator 50 is insensitive to the test force exerted on the handle 18. The indicator 50 will remain in the first inactive position if the lever 18 is forced to the open position O in the event of contact welding.
  • the variant of the indicator 150 illustrated in FIGS. 5 to 7 uses an additional drive spring 66 arranged between the nose 56 of the support lever 28 and the second arm 154.
  • the spring 66 is shaped as a twist pin positioned on a stud 68 of the housing 12. The ends of the spring 66 can move in oblong openings 70, 72 made respectively in the second arm 154, and the nose 56.
  • the step 55 is eliminated, and the rest of the mechanism is identical to that of FIGS. 1 to 4.
  • the operation of the indicator 150 in FIGS. 5 to 7 is similar to that described above, with the difference that the spring 66 plays the role of stroke amplifier, particularly recommended in a single-pole and neutral circuit breaker, in which the two arms of phase and neutral contact are slightly angularly offset.
  • the indicator 250 comprises a first signaling arm 252, the indicator 54 of which is shaped in a circular sector having a diameter close to that of the base 80 of the lever 18.
  • the diameter of the second control arm 254 with step 255 is greater than that of the first arm 252.
  • the indicator 54 remains invisible by being blocked in the first inactive position by the action of the nose 56 on the step 255, even when the lever 18 is forced towards the open position O .
  • the second arm 254 is in abutment against a stop 86 of the base 80.
  • the mechanism 10 is equipped with a device for locking the handle 18 in the event of welding of the contacts 14, 16.
  • the hooking hook 32 is equipped with a protrusion 144 coming into engagement against a stop integral with the housing 12 in the closed-welded state of the contacts 14, 16, to stop the lever 18 in a predetermined intermediate position S, located between the extreme positions F and O.
  • the passing of the dead center of the toggle switch 22 makes it stable said intermediate position S of the lever 18.
  • the indicator 54 remains invisible in this position.
  • the locking of the lever 18 in the position S is effected by the engagement of the protrusion 144 against the stop of the housing 12, which collects the force exerted on the lever 18 in the event of forced actuation.

Landscapes

  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The mechanism (10) of a miniature circuit-breaker includes a bistable indicator (50) mounted in free rotation on the axle (42) of the handle (18) between an active position and an inactive position. The indicator (50) comprises a first signalling arm (52) fitted with an indicator light (54), and a second driving arm (54) displaceable between two end-of-travel stops (58, 60), and having a ledge (55) cooperating with the nose (56) of the contact holder in order to lock the indicator (50) in the inactive position when the handle (18) is actuated from the closed position F towards the open position O in the event of the welding of the contacts (14, 16). <IMAGE>

Description

L'invention est relative à un mécanisme de commande pour disjoncteur électrique à boîtier isolant renfermant une paire de contacts fixe et mobile, ledit contact mobile étant porté par un bras de contact actionné par le mécanisme, lequel comporte une manette montée à pivotement sur un axe et déplaçable dans un orifice du boîtier entre deux positions extrêmes F de fermeture et O d'ouverture, une biellette de transmission accouplée à la manette pour former une genouillère, une liaison mécanique brisable entre la biellette et un levier support du bras de contact, un levier de déclenchement pour verrouiller et déverrouiller la liaison mécanique, et un indicateur mécanique de l'état du disjoncteur ayant un voyant susceptible d'occuper une position active visible de l'extérieur dans la position O d'ouverture de la manette.The invention relates to a control mechanism for an electrical circuit breaker with an insulating housing containing a pair of fixed and movable contacts, said movable contact being carried by a contact arm actuated by the mechanism, which comprises a lever pivotally mounted on an axis. and movable in an orifice of the housing between two extreme positions F for closing and O for opening, a transmission link coupled to the lever to form a toggle joint, a breakable mechanical connection between the link and a support lever for the contact arm, a trip lever for locking and unlocking the mechanical connection, and a mechanical indicator of the state of the circuit breaker having an indicator light capable of occupying an active position visible from the outside in the position O of opening of the lever.

Un tel mécanisme est décrit dans le document EP-A-0 342133, comprenant un dispositif indicateur de soudure des contacts, et de signalisation apparente de l'ouverture du disjoncteur. Le voyant est fixé directement sur la périphérie de l'embase de la manette, et se déplace en continu avec cette dernière. Le positionnement du voyant est néanmoins tributaire de l'effort d'essai exercé sur la manette en cas de soudage des contacts. En fonction de l'élasticité des organes du mécanisme, un actionnement forcé de la manette peut rendre visible une portion du voyant, entraînant des risques d'erreurs sur l'état réel des contacts du disjoncteur.Such a mechanism is described in document EP-A-0 342133, comprising a device for indicating contact soldering, and for apparent signaling of the opening of the circuit breaker. The indicator is fixed directly on the periphery of the joystick base, and moves continuously with the latter. The positioning of the indicator nevertheless depends on the test force exerted on the lever in the event of contact welding. Depending on the elasticity of the mechanism members, a forced actuation of the lever can make a portion of the indicator visible, causing risks of errors on the actual state of the circuit breaker contacts.

L'objet de l'invention consiste à perfectionner la fiabilité d'un indicateur mécanique de l'état d'un disjoncteur en le rendant insensible à l'effort d'essai exercé sur la manette.The object of the invention is to improve the reliability of a mechanical indicator of the state of a circuit breaker by making it insensitive to the test force exerted on the handle.

Le mécanisme selon l'invention est caractérisé en ce que l'indicateur comporte un levier bistable monté à rotation libre sur l'axe de la manette, et coopérant avec un nez du levier support destiné à verrouiller le voyant et à le rendre invisible dans une position inactive stable, lorsque la manette est actionnée depuis la position F de fermeture vers la position O d'ouverture en cas de soudage des contacts.The mechanism according to the invention is characterized in that the indicator comprises a bistable lever mounted for free rotation on the axis of the lever, and cooperating with a nose of the lever support intended to lock the indicator and make it invisible in a stable inactive position, when the lever is actuated from the closed position F to the open position O in the event of soldering of the contacts.

L'agencement bistable de l'indicateur permet de reconnaître en toute sécurité l'état ouvert ou fermé des contacts. Le voyant est exclusivement visible en position active, correspondant à la position d'ouverture de la manette après séparation des contacts. Le voyant est invisible en position inactive lorsque les contacts sont fermés normalement ou par soudure accidentelle. Le voyant est insensible à l'effort d'essai exercé sur la manette, étant donné sa coopération avec le levier support du bras de contact.The bistable arrangement of the indicator makes it possible to safely recognize the open or closed state of the contacts. The indicator is only visible in the active position, corresponding to the opening position of the handle after separation of the contacts. The indicator is invisible in the inactive position when the contacts are closed normally or by accidental welding. The indicator is insensitive to the test force exerted on the lever, given its cooperation with the support arm of the contact arm.

Le passage de la position inactive vers la position active de l'indicateur bistable s'effectue après libération du nez au moyen d'un ressort de rappel, sollicitant simultanément la manette vers la position 0 d'ouverture.The passage from the inactive position to the active position of the bistable indicator takes place after release of the nose by means of a return spring, simultaneously urging the lever towards the 0 opening position.

Le levier de l'indicateur comporte un premier bras de signalisation sur lequel est agencé le voyant, et un deuxième bras de commande coopérant avec le nez, les deux bras étant décalés angulairement l'un de l'autre par un angle prédéterminé, centré sur l'axe de la manette.The indicator lever includes a first signaling arm on which the indicator is arranged, and a second control arm cooperating with the nose, the two arms being angularly offset from each other by a predetermined angle, centered on the axis of the joystick.

Le rappel de l'indicateur vers la position inactive s'effectue au moyen de l'action de la manette sur le premier bras.The indicator is returned to the inactive position by means of the action of the lever on the first arm.

Selon un développement de l'invention, le mécanisme est équipé d'un dispositif mécanique de blocage de la manette dans une position S intermédiaire en cas de soudage des contacts. Il en résulte une fonction de sectionnement à coupures pleinement apparente, et à indicateur de position des contacts.According to a development of the invention, the mechanism is equipped with a mechanical device for locking the handle in an intermediate position S in the event of soldering of the contacts. This results in a fully visible cut-off function with contact position indicator.

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

  • la figure 1 est une vue schématique du mécanisme équipé de l'indicateur selon l'invention, le disjoncteur étant représenté en position fermé-soudé des contacts;
  • les figures 2 à 4 sont des vues partielles à échelles agrandies de la figure 1, montrant l'indicateur respectivement en position de fermeture, en position fermé-soudé, et en position d'ouverture du mécanisme;
  • les figures 5 à 7 sont des vues identiques des figures 2 à 4 d'une variante de réalisation.
  • les figures 8 et 9 montrent deux vues de la manette d'une autre variante d'indicateur représenté en position d'ouverture et en position soudé.
  • la figure 10 est une vue identique à la figure 1, le mécanisme étant équipé d'un dispositif de blocage de la manette en cas de soudage des contacts.
Other advantages and characteristics will emerge more clearly from the description which follows in a mode. embodiment of the invention given by way of example and represented in the appended drawings, in which:
  • Figure 1 is a schematic view of the mechanism equipped with the indicator according to the invention, the circuit breaker being shown in the closed-welded position of the contacts;
  • Figures 2 to 4 are partial views on enlarged scales of Figure 1, showing the indicator respectively in the closed position, in the closed-welded position, and in the open position of the mechanism;
  • Figures 5 to 7 are identical views of Figures 2 to 4 of an alternative embodiment.
  • Figures 8 and 9 show two views of the handle of another variant of indicator shown in the open position and in the welded position.
  • Figure 10 is a view identical to Figure 1, the mechanism being equipped with a device for locking the handle in the event of soldering of the contacts.

En référence à la figure 1, le mécanisme 10 est logé dans le boîtier 12 isolant du disjoncteur, et est destiné à actionner un bras de contact mobile 13 ayant une pièce de contact 14 coopérant avec un contact fixe 16. Le mécanisme 10 comporte une manette 18 pivotante accouplée à une biellette 20 de transmission pour former une genouillère 22, et une platine 24 montée à rotation limitée sur un pivot 26 entre une position de fermeture et une position d'ouverture des contacts 14, 16. Sur le pivot 26 est enfilé un levier support 28 isolant du bras ce contact 13. Une liaison mécanique 30 à bielle brisable est formée par une deuxième genouillère ayant un crochet d'accrochage 32 monté à pivotement sur un axe 34 de la platine 24 en étant articulé à la biellette 20 de transmission.Referring to Figure 1, the mechanism 10 is housed in the insulating case 12 of the circuit breaker, and is intended to actuate a movable contact arm 13 having a contact piece 14 cooperating with a fixed contact 16. The mechanism 10 comprises a lever 18 pivotally coupled to a transmission link 20 to form a toggle switch 22, and a plate 24 mounted with limited rotation on a pivot 26 between a closed position and an open position of the contacts 14, 16. On the pivot 26 is threaded a support lever 28 insulating the arm from this contact 13. A mechanical connection 30 with a breakable connecting rod is formed by a second toggle joint having a hooking hook 32 pivotally mounted on an axis 34 of the plate 24 while being articulated to the connecting rod 20 of transmission.

Un levier de déclenchement 36 est monté sur un axe 38 de la platine 24 et coopère avec le bec de retenue du crochet d'accrochage 32 pour assurer le verrouillage et le déverrouillage de la liaison mécanique 30.A trigger lever 36 is mounted on an axis 38 of the plate 24 and cooperates with the retaining spout of the hook 32 to ensure the locking and unlocking of the mechanical link 30.

La manette 18 fait saillie d'un orifice 40 du boîtier 12 et est montée à pivotement sur un axe 42 entre deux positions extrèmes F et 0 correspondant respectivement à la fermeture et à l'ouverture des contacts 14,16.The lever 18 projects from an orifice 40 in the housing 12 and is pivotally mounted on an axis 42 between two extreme positions F and 0 corresponding respectively to the closing and opening of the contacts 14,16.

Selon l'invention, le mécanisme 10 est doté c'un indicateur 50 mécanique formé par un levier bistable (fig. 1 à 4) monté à rotation libre sur l'axe 42 de la manette 18. Un ressort de rappel (non représenté) sollicite l'indicateur 50 dans le sens inverse des aiguilles d'une montre correspondant au sens d'ouverture de la manette 18. L'indicateur 50 comporte un premier bras 52 de signalisation dont la face latérale porte un voyant 54 coloré et une deuxième bras 54′ de commande équipé d'un redan 55 susceptible de coopérer avec un nez 56 du levier support 28. Les premier et deuxième bras 52,54′ sont décalés angulairement l'un de l'autre par un angle aigu centré sur l'axe 42 de la manette 18. Les deux flancs opposés du deuxième bras 54′ viennent en engagement avec une paire de butées de fin de course 58,60, solidaire du boîtier 12 pour délimiter la course angulaire de l'indicateur 50.According to the invention, the mechanism 10 is provided with a mechanical indicator 50 formed by a bistable lever (fig. 1 to 4) mounted for free rotation on the axis 42 of the lever 18. A return spring (not shown) requests the indicator 50 anticlockwise corresponding to the direction of opening of the lever 18. The indicator 50 comprises a first signaling arm 52, the side face of which carries a colored light 54 and a second arm 54 ′ of control equipped with a step 55 capable of cooperating with a nose 56 of the support lever 28. The first and second arms 52, 54 ′ are angularly offset from one another by an acute angle centered on the axis 42 of the lever 18. The two opposite flanks of the second arm 54 ′ come into engagement with a pair of end-of-travel stops 58.60, integral with the housing 12 to delimit the angular travel of the indicator 50.

Le fonctionnement du mécanisme 10 à indicateur 50 mécanique selon les figures 1 à 4 est le suivant :The operation of the mechanism 10 with mechanical indicator 50 according to FIGS. 1 to 4 is as follows:

Dans la position de fermeture des contacts 14,16 (fig. 2), la manette 18 se trouve dans la position F stable de droite, et son bossage 62 prend appui sur le premier bras 52 sollicitant le deuxième bras 54′ de commande montre la première butée 58.In the closed position of the contacts 14,16 (fig. 2), the lever 18 is in the stable position F on the right, and its boss 62 is supported on the first arm 52 urging the second control arm 54 ′ shows the first stop 58.

L'indicateur 50 se trouve dans une première position inactive stable, dans laquelle le voyant 54 du premier bras 52 reste invisible depuis l'extérieur.The indicator 50 is in a first stable inactive position, in which the indicator 54 of the first arm 52 remains invisible from the outside.

En cas de soudage des contacts 14,16 (fig. 1 et 3), le bras de contact 13 et son levier support 28 restent fixes, et le nez 56 bloque le redan 55 du deuxième bras 54′ pour maintenir l'indicateur 50 dans la première position stable, lorsque l'opérateur tente d'actionner la manette 18 vers la position d'ouverture. Le voyant 54 reste invisible lorsque la manette 18 se trouve entre la position S intermédiaire, et la position O d'ouverture.In the event of welding of the contacts 14, 16 (fig. 1 and 3), the contact arm 13 and its support lever 28 remain fixed, and the nose 56 blocks the step 55 of the second arm 54 ′ to maintain the indicator 50 in the first stable position, when the operator attempts to actuate the lever 18 towards the open position. The indicator 54 remains invisible when the lever 18 is between the intermediate position S and the open position O.

En cas de non-soudage des contacts 14,16 suite à une ouverture manuelle ou un déclenchement automatique du mécanisme 10, la manette 18 est déplacée vers la position 0 de gauche, et le nez 56 du levier support 28 n'interfère plus avec le redan 55 du deuxième bras 54′. L'absence de blocage du nez 56 sur le deuxième bras 54′ et du bossage 62 de la manette 18 sur le premier bras 52 autorise le pivotement dans le sens inverse des aiguilles d'une montre de l'indicateur 50 vers la deuxième position active stable (fig. 4) sous l'action du ressort de rappel. Le deuxième bras 54′ est en appui contre la deuxième butée 60, et l'apparition du voyant 54 hors de l'orifice 40, signale l'ouverture effective des contacts 14,16.In the event of non-welding of the contacts 14, 16 following a manual opening or an automatic triggering of the mechanism 10, the lever 18 is moved to the left position 0, and the nose 56 of the support lever 28 no longer interferes with the step 55 of the second arm 54 ′. The absence of blocking of the nose 56 on the second arm 54 ′ and of the boss 62 of the lever 18 on the first arm 52 allows the pivoting of the indicator 50 in the anti-clockwise direction towards the second active position. stable (fig. 4) under the action of the return spring. The second arm 54 ′ is in abutment against the second stop 60, and the appearance of the indicator 54 outside the orifice 40 signals the effective opening of the contacts 14, 16.

La refermeture du disjoncteur s'opère par déplacement de la manette 18 à partir de la position 0 vers la position F. Au cours de cette opération de pivotement, le bossage 62 de la manette 18 pousse le premier bras 52 dans le sens des aiguilles d'une montre, et ramène automatiquement l'indicateur 50 vers la première position stable à l'encontre de la force de rappel du ressort.The reclosing of the circuit breaker is effected by displacement of the handle 18 from position 0 to position F. During this pivoting operation, the boss 62 of the handle 18 pushes the first arm 52 in the direction of the needles d 'a watch, and automatically returns the indicator 50 to the first stable position against the return force of the spring.

On remarque que le voyant 54 peut occuper deux positions stables, dont l'une correspondant à l'état visible indique la séparation des contacts 14,16, et dont l'autre correspondant à l'état invisible, signale la fermeture normale ou soudée des contacts 14,16. La fonction de visualisation est réalisée par une pièce distincte de la manette 18. De par sa coopération avec le nez 56 du levier support 28, l'indicateur 50 bistable est insensible à l'effort d'essai exercé sur la manette 18. L'indicateur 50 restera dans la première position inactive si la manette 18 est forcée vers la position O d'ouverture en cas de soudage des contacts.Note that the indicator 54 can occupy two stable positions, one of which corresponding to the visible state indicates the separation of the contacts 14,16, and the other of which corresponding to the invisible state, signals the normal or welded closure of the contacts 14.16. The display function is performed by a separate part of the handle 18. By its cooperation with the nose 56 of the support lever 28, the bistable indicator 50 is insensitive to the test force exerted on the handle 18. The indicator 50 will remain in the first inactive position if the lever 18 is forced to the open position O in the event of contact welding.

La variante de l'indicateur 150 illustrée aux figures 5 à 7 utilise un ressort 66 additionnel d'entraînement agencé entre le nez 56 du levier support 28 et le deuxième bras 154. Le ressort 66 est conformé en épingle à torsion positionnée sur un plot 68 du boîtier 12.Les extrémités du ressort 66 peuvent se déplacer dans des ouvertures 70,72 oblongues ménagées respectivement dans le deuxième bras 154, et la nez 56. Le redan 55 est supprimé, et le reste du mécanisme est identique à celui des figures 1 à 4.The variant of the indicator 150 illustrated in FIGS. 5 to 7 uses an additional drive spring 66 arranged between the nose 56 of the support lever 28 and the second arm 154. The spring 66 is shaped as a twist pin positioned on a stud 68 of the housing 12.The ends of the spring 66 can move in oblong openings 70, 72 made respectively in the second arm 154, and the nose 56. The step 55 is eliminated, and the rest of the mechanism is identical to that of FIGS. 1 to 4.

Le fonctionnement de l'indicateur 150 des figures 5 à 7 est similaire à celui décrit précédemment, avec la différence que le ressort 66 joue le rôle d'amplificateur de course, particulièrement recommandé dans un disjoncteur unipolaire et neutre, dans lequel les deux bras de contact de phase et de neutre sont légèrement décalés angulairement.The operation of the indicator 150 in FIGS. 5 to 7 is similar to that described above, with the difference that the spring 66 plays the role of stroke amplifier, particularly recommended in a single-pole and neutral circuit breaker, in which the two arms of phase and neutral contact are slightly angularly offset.

Sur les figures 8 et 9, les butées de fin de course 58,60 sont supprimées sur le boîtier 12. L'indicateur 250 comporte un premier bras 252 de signalisation, dont le voyant 54 est conformé en secteur circulaire ayant un diamètre voisin de celui de l'embase 80 de la manette 18. Le diamètre du deuxième bras 254 à redan 255 de commande est supérieur à celui du premier bras 252.In FIGS. 8 and 9, the end stops 58.60 are eliminated on the housing 12. The indicator 250 comprises a first signaling arm 252, the indicator 54 of which is shaped in a circular sector having a diameter close to that of the base 80 of the lever 18. The diameter of the second control arm 254 with step 255 is greater than that of the first arm 252.

En position O d'ouverture de la manette 18 et en cas de non soudage des montants 14,16 (figure 8), le voyant 54 est visible dans la deuxième position active, et le premier bras 252 est sollicité en butée contre le bossage 62 de l'embase 80 par le ressort de rappel 82 de la manette 18.In position O of opening of the lever 18 and in the event of non-welding of the uprights 14, 16 (FIG. 8), the indicator 54 is visible in the second active position, and the first arm 252 is biased in abutment against the boss 62 of the base 80 by the return spring 82 of the lever 18.

En cas de soudage des contacts (figure 9), le voyant 54 reste invisible en étant bloqué dans la première position inactive par l'action du nez 56 sur le redan 255, même lorsque la manette 18 est forcée vers la position O d'ouverture. Le deuxième bras 254 se trouve en appui contre une butée 86 de l'embase 80.In the event of soldering of the contacts (FIG. 9), the indicator 54 remains invisible by being blocked in the first inactive position by the action of the nose 56 on the step 255, even when the lever 18 is forced towards the open position O . The second arm 254 is in abutment against a stop 86 of the base 80.

En référence à la figure 10, le mécanisme 10 est équipé d'un dispositif de blocage de la manette 18 en cas de soudage des contacts 14, 16. Le crochet d'accrochage 32 est équipé d'une protubérance 144 venant en engagement contre une butée solidaire du boîtier 12 dans l'état fermé-soudé des contacts 14,16, pour stopper la manette 18 dans une position intermédiaire S prédéterminée, située entre les positions extrêmes F et O. Le dépassement de point mort de la genouillère 22 rend stable ladite position intermédiaire S de la manette 18. Le voyant 54 reste invisible dans cette position. Le blocage de la manette 18 dans la position S est opéré par l'engagement de la protubérance 144 contre la butée du boîtier 12, lequel encaisse l'effort exercé sur la manette 18 en cas d'actionnement forcé.With reference to FIG. 10, the mechanism 10 is equipped with a device for locking the handle 18 in the event of welding of the contacts 14, 16. The hooking hook 32 is equipped with a protrusion 144 coming into engagement against a stop integral with the housing 12 in the closed-welded state of the contacts 14, 16, to stop the lever 18 in a predetermined intermediate position S, located between the extreme positions F and O. The passing of the dead center of the toggle switch 22 makes it stable said intermediate position S of the lever 18. The indicator 54 remains invisible in this position. The locking of the lever 18 in the position S is effected by the engagement of the protrusion 144 against the stop of the housing 12, which collects the force exerted on the lever 18 in the event of forced actuation.

Claims (9)

  1. An operating mechanism for an electrical circuit breaker with an insulating case (12) housing a pair of stationary (16) and movable (14) contacts, said movable contact (14) being supported by a contact arm (13) actuated by the mechanism (10), which mechanism comprises a handle (18) pivotally mounted on a spindle (42) and movable in an orifice (40) of the case (12) between two extreme closed F and open O positions, a transmission rod (20) coupled to the handle (18) to form a toggle (22), a breakable mechanical link (30) between the rod (20) and a support lever (28) of the contact arm (13), a trip lever (36) to lock and unlock the mechanical link (30), and a mechanical indicator (50, 150, 250) of the state of the circuit breaker having a flag (54) designed to occupy an active position visible from outside in the open position o of the handle (18), characterized in that the indicator (50, 150, 250) comprises a bistable lever mounted with free rotation on the spindle (42) of the handle (18), and cooperating with a nose (56) of the support lever (28) designed to lock the flag (54) and make it invisible in a stable inactive position, when the handle (18) is actuated from the closed position F to the open position O in the event of welding of the contacts (14, 16).
  2. The operating mechanism according to claim 1, characterized in that moving from the inactive position to the active position of the bistable indicator (50, 150, 250) takes place after the nose (56) has been released by means of a return spring (82), simultaneously urging the handle (18) to the open position O.
  3. The operating mechanism according to claim 1 or 2, characterized in that the lever of the indicator (50, 150) comprises a first indicating arm (52, 252) on which the flag 54 is arranged, and a second operating arm (54′, 154, 254) cooperating with the nose (56), said first arm (52, 252) and second arm (54′, 154, 254) being angularly offset from one another by a predetermined angle, centred on the spindle (42) of the handle (18).
  4. The operating mechanism according to claim 3, characterized in that the handle (18) is provided with a boss (62) designed to act on the first arm (52) in the closing direction, to move the indicator (50, 150, 250) back to the inactive position.
  5. The operating mechanism according to claim 3 or 4, characterized in that the operating second arm (54′, 154, 254) is movable between two end-of-travel stops (58, 60, 62, 86) limiting the angular travel of the indicator (50, 150, 250).
  6. The operating mechanism according to one of the claims 3 to 5, characterized in that the second arm (54′, 254) of the indicator (50, 250) is equipped with a cheek (55, 255) coming up against the nose (56) in the event of welding of the contacts (14, 16).
  7. The operating mechanism according to one of the claims 3 to 5, characterized in that an additional drive spring (66) is fitted between the nose (56) and the second arm (154) of the indicator (150) to act as an angular travel amplifier.
  8. The operating mechanism according to claim 7, characterized in that the spring (66) is shaped as a torsion pin positioned on a fixed stud (68), and having its two ends housed in oblong openings (70, 72) arranged respectively in the second arm (154) and the nose (56).
  9. The operating mechanism according to one of the claims 1 to 8, characterized in that the mechanism (10) is equipped with a device for positive blocking of the handle (18) in an intermediate position S in case of welding of the contacts (14, 16), said position S being stable after the dead point of the toggle (22) has been passed.
EP91420108A 1990-04-09 1991-03-29 Driving mechanism for circuit breaker Expired - Lifetime EP0452230B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004642A FR2660794B1 (en) 1990-04-09 1990-04-09 CONTROL MECHANISM OF AN ELECTRIC CIRCUIT BREAKER.
FR9004642 1990-04-09

Publications (2)

Publication Number Publication Date
EP0452230A1 EP0452230A1 (en) 1991-10-16
EP0452230B1 true EP0452230B1 (en) 1994-12-07

Family

ID=9395658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420108A Expired - Lifetime EP0452230B1 (en) 1990-04-09 1991-03-29 Driving mechanism for circuit breaker

Country Status (5)

Country Link
EP (1) EP0452230B1 (en)
AT (1) ATE115329T1 (en)
DE (1) DE69105591T2 (en)
ES (1) ES2067899T3 (en)
FR (1) FR2660794B1 (en)

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US6804101B2 (en) 2001-11-06 2004-10-12 General Electric Company Digital rating plug for electronic trip unit in circuit breakers

Also Published As

Publication number Publication date
EP0452230A1 (en) 1991-10-16
DE69105591T2 (en) 1995-06-08
DE69105591D1 (en) 1995-01-19
ES2067899T3 (en) 1995-04-01
FR2660794A1 (en) 1991-10-11
ATE115329T1 (en) 1994-12-15
FR2660794B1 (en) 1996-07-26

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