EP3091557B1 - Device for controlling an electrical protection unit and electrical protection unit comprising same - Google Patents
Device for controlling an electrical protection unit and electrical protection unit comprising same Download PDFInfo
- Publication number
- EP3091557B1 EP3091557B1 EP16164270.7A EP16164270A EP3091557B1 EP 3091557 B1 EP3091557 B1 EP 3091557B1 EP 16164270 A EP16164270 A EP 16164270A EP 3091557 B1 EP3091557 B1 EP 3091557B1
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- EP
- European Patent Office
- Prior art keywords
- plate
- aforementioned
- insert
- control device
- intended
- 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.)
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- 230000005540 biological transmission Effects 0.000 claims description 26
- 230000007246 mechanism Effects 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 230000000284 resting effect Effects 0.000 claims 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 11
- 230000009467 reduction Effects 0.000 description 9
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
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- 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
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- 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
- H01H71/12—Automatic release mechanisms with or without manual release
-
- 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
Definitions
- the present invention also relates to an electrical protection apparatus comprising such a control device, and in particular a low-voltage circuit breaker.
- the patent is known FR 2,589,627 of the aforementioned kind in which the transmission rod cooperates with the platen bearing on it.
- the force of the mechanism is taken up two thirds on the plate and a third on the trigger bar. There is no multiplier effect.
- the patent is also known FR 2,616,583 describing a control mechanism of a miniature electric circuit breaker having the features mentioned above.
- the assembly comprising the transmission link, the hook, and the trip lever is a reduction stage allowing a reduction of the triggering force.
- the force of the rod exerts a torque on the hook only. Since all the effort of the rod is concentrated on the hook, significant efforts are generated on the bar.
- the patent is also known FR 2 914 485 in which the effort of the connecting rod is distributed on the plate and on the hook. So we get less stress on the bar. Thus, the triggering forces are reduced.
- the force exerted by the rod is two to three times greater than that usually exercised in this type of device, which can be of the order of 100N. In this case, there is therefore an increased risk of matting the support zone of the rod on the plate, and significant friction coefficients during a trip.
- the present invention solves these problems and proposes a device for controlling an electrical protection device, as well as an electric protection device comprising it, making it possible to reduce the triggering forces and to eliminate the non-triggering phenomena due to a matting process.
- the support zone of the plate by the transmission rod in the so-called locking position of the control device corresponding to a closed position of the contacts of the device.
- the subject of the present invention is a control device of the kind mentioned above, this device being characterized in that it comprises a rigid insert mounted on the plate and intended to be interposed between the transmission link and a transmission zone.
- the plate constituting a bearing zone of this link on the plate in the aforementioned locking position, and means for maintaining the position of said insert without play with respect to said plate. Thanks to these characteristics, there is no more matting of the support zone on the plate by the connecting rod, resulting in a reduction of the friction coefficients during a trip.
- this rigid insert comprises a substantially V-shaped folded sheet, this sheet being intended to be fixed around an axis-forming portion of the rod, this portion of an axis-forming rod being intended to be fixedly mounted in the plate. and extending substantially perpendicularly to the plane of said V.
- the aforementioned rod portion is mounted tightly in the plate.
- the assembly of the aforementioned insert on the rod portion is performed by laser welding.
- said insert is mounted in a recess formed in the plate, so that the plane in which said V extends is substantially parallel to the plane of a face of the plate located opposite the transmission rod .
- the aforementioned holding means comprise a projection provided on one face of the above-mentioned recess and intended to bear against an outer face of one of the branches of said V, said boss being intended to serve as a reference angularly to the assembly comprising the rod portion and the insert, said boss being intended to cooperate with a projecting portion belonging to another face of the above-mentioned recess, opposite to the preceding one, this protruding portion being intended for come to bear against an inner face of this same branch of the aforementioned V, opposite to the aforementioned outer face, said boss being intended to serve as an angular reference to the assembly comprising the rod portion and the insert relative to the axis of the rod, and the above-mentioned projecting part cooperating with the above-mentioned boss so as to immobilize the insert in rotation with respect to the platinum around it of the axis of the aforementioned rod portion. Thanks to these characteristics, the insert is maintained and positioned in the plate without play, which prevents the matting of the insert
- this projecting portion comprises a tip.
- this insert is a metal insert.
- the rod is the needle around which the aforementioned hook is rotatably mounted relative to the plate.
- the aforementioned transmission rod is supported both on the hook and on the plate in the locking position of the hook.
- the force of the connecting rod is distributed on the plate and on the hook. So we get less stress on the bar. Thus, the tripping efforts are further reduced.
- the present invention also relates to an electrical protection apparatus comprising a control device comprising the previously mentioned features taken alone or in combination.
- this apparatus is a low-voltage circuit breaker.
- a miniature electric circuit breaker 1 molded insulating housing comprising a control device 2 according to the invention.
- This device comprises a support device 3 of the movable contact 4, said mobile contact 4 cooperating with a fixed contact 5.
- An opening 7 is provided in the front face 8 of the housing for the passage of a lever 6 mounted pivotally limited on an axis 11 of the housing between a closed position in which the contacts 4,5 are closed, and a position of opening corresponding to the separation of contacts 4,5.
- the lever 6 is equipped with an internal base 9 coupled to a transmission rod 10 to form a toggle device whose articulation 12 is eccentric with respect to the fixed axis 11 of the lever 6.
- the lever 6 is biased in the trigonometric direction towards the position of opening of the contacts by a return spring (not shown).
- the fixed contact 5 is secured to the casing of the electromagnetic trip unit.
- the movable contact 4 is fixed to the support device 3 of the movable contact 4, said support 3 being articulated on a pivot 40, the rotating plate 15 being rotatably mounted around the pivot 14.
- a triggering lever 16 controlled by the striker of the electromagnetic release, the bimetallic strip of the thermal release (not shown) or an external auxiliary, is pivotally mounted on an axis 17 carried by the plate 15 with a predetermined offset relative to the aforementioned pivot 14 .
- the control device 2 is in a position of the open contacts, the lever 6 being in the open position. In this position, the transmission rod 10 exerts no effort on the plate.
- the lever 6 is actuated to close the contacts, the latter moves the rod 10 which bears on the plate 15 via the insert 30, and on the hook 19.
- the hook 19 is locked on the trigger bar (or lever) 16. ( fig.7 ).
- the rod 10 bears on the plate 15 and on the hook 19, pivots the plate 15 about its axis 20 until the contacts 4,5 close. The rod continues its race until the dead center of the toggle formed by the lever 6 and the link 10 is crossed.
- the mechanism takes the equilibrium position which keeps the contacts closed.
- the position shown in FIG. figure 8 The position shown in FIG. figure 8 .
- the rod 10 exerts a force F distributed according to a force F1 exerted on the insert 30 and a force F2 exerted on the release lever 16.
- the handle 6 is actuated until it crosses the dead center of the toggle in the opposite direction.
- the mechanism then joins the equilibrium position, the contacts being open, when the handle reaches the end of its stroke, the position represented on the figures 1 and 7 .
- the hook 19 is unlocked, but the lever 6 does not return immediately to its open position.
- the balance of forces exerted by the rod 10 on the mechanism is broken.
- the plate 15 rotates about its axis 14 and opens the contacts, the position shown on the figure 9 .
- the opening 25 ( fig.1 ) provided inside the hook 19, allows the rotation of the hook about the axis 20,32 and this opening 25 of the hook and the openings 26 of the plate 15, allow the rotation of the plate, the lever being still held in closed contact position.
- the spring of the joystick brings it in open contacts position and the rod returns the hook in the initial position.
- the biasing spring 27 of the hook and resetting of the bar places them in a position to lock the hook on the bar when the handle is actuated to close the contacts.
- the openings 26 provided in the plate 15 participate in guiding the link 10 so as to bring it back into the support position on the plate.
- the rod 10 bears on the contact holder plate 15 according to F1 through the insert 30, and on the locking hook 19 according to F2, the relative positions of the two bearing surfaces and the ratio of the arms Leverage is optimized so that the force that locks the hook is reduced to a minimum.
- the system comprises two stages of reduction. According to the first, the force of the mechanism is taken up largely on the plate and in a smaller part on the hook. According to the second, by a set of lever arms on the hook, the force is multiplied on the trigger lever.
- the invention therefore advantageously applies to such devices in which the force of the link is exerted both on the plate and on the hook, but not exclusively. Indeed, the invention also applies advantageously to devices in which the force of the link applies only to the plate for example, with the result of reducing the triggering forces.
- the invention solves the problem of lack of tripping circuit breakers through a set comprising an axis needle and a V-shaped sheet easy to make and assemble, this set to obtain a reduction 50% of the tripping efforts of a circuit breaker with a rating of up to 120A. It should also be noted that this reduction of the tripping forces also makes it possible to obtain an improvement in the thermal adjustment, because the efforts being less important, there is less difficulty in finding the right bimetal shade.
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Breakers (AREA)
Description
La présente invention concerne un dispositif de commande d'un appareil de protection électrique logé dans un boîtier isolant renfermant une paire de contacts fixe et mobile, ledit contact mobile pouvant être actionné soit manuellement par l'intermédiaire d'une manette soit automatiquement, comprenant
- une biellette de transmission accouplée à la manette,
- un dispositif de support du contact mobile comportant une platine montée à rotation sur un pivot et ayant une liaison mécanique brisable avec la biellette de transmission, et
- un levier de déclenchement commandé par un déclencheur pour provoquer en cas de défaut la rupture de la liaison mécanique, entraînant le déclenchement automatique du mécanisme indépendamment de la manette et la séparation des contacts,
- la liaison mécanique brisable étant formée par un cran de retenue du levier de déclenchement coopérant avec un crochet d'accrochage monté à pivotement sur un axe de la platine, la rupture de la liaison mécanique correspondant au déverrouillage de l'accrochage, la biellette de transmission, en position de verrouillage de l'accrochage prenant appui au moins en partie sur la platine.
- a transmission link coupled to the joystick,
- a device for supporting the movable contact comprising a plate rotatably mounted on a pivot and having a breakable mechanical connection with the transmission link, and
- a release lever controlled by a trigger to cause, in the event of a fault, the breaking of the mechanical link, causing the automatic triggering of the mechanism independently of the handle and the separation of the contacts,
- the breakable mechanical connection being formed by a catch of the release lever cooperating with a hook hook pivotally mounted on an axis of the plate, the breaking of the mechanical connection corresponding to the unlocking of the attachment, the transmission link , in locking position of the latch bearing at least partly on the plate.
La présente invention a encore pour objet un appareil de protection électrique comportant un tel dispositif de commande, et en particulier un disjoncteur basse tension.The present invention also relates to an electrical protection apparatus comprising such a control device, and in particular a low-voltage circuit breaker.
On connaît le brevet
On connaît également le brevet
Dans ce document, l'ensemble comprenant la biellette de transmission, le crochet, et le levier de déclenchement constitue un étage démultiplicateur autorisant une réduction de l'effort de déclenchement. Dans ce mécanisme, la force de la biellette exerce un couple sur le crochet d'accrochage seulement.
Etant donné que tout l'effort de la bielle est concentré sur le crochet, des efforts importants sont engendrés sur la barre.
On connaît également le brevet
On obtient donc un effort moins important sur la barre. Ainsi, les efforts de déclenchement sont réduits.
Or, dans certains appareils du type de celui dernièrement décrit précédemment, l'effort exercé par la bielle est deux à trois fois plus important que celui exercé habituellement dans ce type d'appareil, pouvant être de l'ordre de 100N. Dans ce cas, il y a donc un risque accru de matage de la zone d'appui de la biellette sur la platine, et de coefficients de frottement importants lors d'un déclenchement.The patent is also known
In this document, the assembly comprising the transmission link, the hook, and the trip lever is a reduction stage allowing a reduction of the triggering force. In this mechanism, the force of the rod exerts a torque on the hook only.
Since all the effort of the rod is concentrated on the hook, significant efforts are generated on the bar.
The patent is also known
So we get less stress on the bar. Thus, the triggering forces are reduced.
However, in some devices of the type recently described above, the force exerted by the rod is two to three times greater than that usually exercised in this type of device, which can be of the order of 100N. In this case, there is therefore an increased risk of matting the support zone of the rod on the plate, and significant friction coefficients during a trip.
La présente invention résout ces problèmes et propose un dispositif de commande d'un appareil de protection électrique, ainsi qu'un appareil de protection électrique le comportant, permettant de réduire les efforts de déclenchement et de supprimer les phénomènes de non déclenchement dus à un matage de la zone d'appui de la platine par la biellette de transmission en position dite de verrouillage du dispositif de commande correspondant à une position fermée des contacts de l'appareil.The present invention solves these problems and proposes a device for controlling an electrical protection device, as well as an electric protection device comprising it, making it possible to reduce the triggering forces and to eliminate the non-triggering phenomena due to a matting process. the support zone of the plate by the transmission rod in the so-called locking position of the control device corresponding to a closed position of the contacts of the device.
A cet effet, la présente invention a pour objet un dispositif de commande du genre précédemment mentionné, ce dispositif étant caractérisé en ce qu'il comporte un insert rigide monté sur la platine et destiné à être interposé entre la biellette de transmission et une zone de la platine constituant une zone d'appui de cette biellette sur la platine dans la position de verrouillage précitée, et des moyens de maintien en position sans jeu de cet insert par rapport à ladite platine.
Grâce à ces caractéristiques, il n'y a plus de matage de la zone d'appui sur la platine par la bielle, avec comme conséquence une réduction des coefficients de frottement lors d'un déclenchement.For this purpose, the subject of the present invention is a control device of the kind mentioned above, this device being characterized in that it comprises a rigid insert mounted on the plate and intended to be interposed between the transmission link and a transmission zone. the plate constituting a bearing zone of this link on the plate in the aforementioned locking position, and means for maintaining the position of said insert without play with respect to said plate.
Thanks to these characteristics, there is no more matting of the support zone on the plate by the connecting rod, resulting in a reduction of the friction coefficients during a trip.
Ainsi, les efforts de déclenchement trop importants ainsi que les « non déclenchements » dus à un matage de la platine par la bielle sont supprimés.Thus, too large triggering efforts as well as "no trigger" due to matting of the plate by the connecting rod are removed.
Selon une caractéristique particulière, cet insert rigide comporte une tôle pliée sensiblement en forme de V, cette tôle étant destinée à être fixée autour d'une portion de tige formant axe, cette portion de tige formant axe étant destinée à être montée fixement dans la platine et s'étendant sensiblement perpendiculairement au plan dudit V.According to a particular characteristic, this rigid insert comprises a substantially V-shaped folded sheet, this sheet being intended to be fixed around an axis-forming portion of the rod, this portion of an axis-forming rod being intended to be fixedly mounted in the plate. and extending substantially perpendicularly to the plane of said V.
Selon une autre caractéristique, la portion de tige précitée est montée serrée dans la platine.According to another feature, the aforementioned rod portion is mounted tightly in the plate.
Selon une autre caractéristique, l'assemblage de l'insert précité sur la portion de tige est réalisé par soudure laser.According to another characteristic, the assembly of the aforementioned insert on the rod portion is performed by laser welding.
Selon une autre caractéristique, ledit insert est monté dans un évidement formé dans la platine, de telle manière que le plan dans lequel s'étend ledit V soit sensiblement parallèle au plan d'une face de la platine située en regard de la bielle de transmission.According to another characteristic, said insert is mounted in a recess formed in the plate, so that the plane in which said V extends is substantially parallel to the plane of a face of the plate located opposite the transmission rod .
Selon une autre caractéristique, les moyens de maintien précités comportent un bossage prévu sur une face de l'évidement précité et destiné à venir en appui contre une face extérieure de l'une des branches du V précité, ledit bossage étant destiné à servir de référence angulaire à l'ensemble comportant la portion de tige et l'insert, le dit bossage étant destiné à coopérer avec une partie en saillie appartenant à une autre face de l'évidement précité, opposée à la précédente, cette partie en saillie étant destinée à venir en appui contre une face intérieure de cette même branche du V précité, opposée à la face extérieure précitée, ledit bossage étant destiné à servir de référence angulaire à l'ensemble comportant la portion de tige et l'insert par rapport à l'axe de la tige, et la partie en saillie précitée coopérant avec le bossage précité de manière à réaliser un blocage en rotation de l'insert par rapport à la platine autour de l'axe de la portion de tige précitée.
Grâce à ces caractéristiques, l'insert est maintenu et positionné dans la platine sans jeu, ce qui permet d'empêcher le matage de la platine.According to another characteristic, the aforementioned holding means comprise a projection provided on one face of the above-mentioned recess and intended to bear against an outer face of one of the branches of said V, said boss being intended to serve as a reference angularly to the assembly comprising the rod portion and the insert, said boss being intended to cooperate with a projecting portion belonging to another face of the above-mentioned recess, opposite to the preceding one, this protruding portion being intended for come to bear against an inner face of this same branch of the aforementioned V, opposite to the aforementioned outer face, said boss being intended to serve as an angular reference to the assembly comprising the rod portion and the insert relative to the axis of the rod, and the above-mentioned projecting part cooperating with the above-mentioned boss so as to immobilize the insert in rotation with respect to the platinum around it of the axis of the aforementioned rod portion.
Thanks to these characteristics, the insert is maintained and positioned in the plate without play, which prevents the matting of the plate.
Avantageusement, cette partie en saillie comporte une pointe.Advantageously, this projecting portion comprises a tip.
Avantageusement, cet insert est un insert métallique.Advantageously, this insert is a metal insert.
Selon une caractéristique particulière, la tige est l'aiguille autour de laquelle le crochet précité est monté en rotation par rapport à la platine.According to a particular characteristic, the rod is the needle around which the aforementioned hook is rotatably mounted relative to the plate.
Selon une réalisation particulière, la bielle de transmission précitée prend appui à la fois sur le crochet et sur la platine en position de verrouillage du crochet.
Selon cette réalisation, l'effort de la bielle est réparti sur la platine et sur le crochet. On obtient donc un effort moins important sur la barre.
Ainsi, les efforts de déclenchement sont encore réduits.According to a particular embodiment, the aforementioned transmission rod is supported both on the hook and on the plate in the locking position of the hook.
According to this embodiment, the force of the connecting rod is distributed on the plate and on the hook. So we get less stress on the bar.
Thus, the tripping efforts are further reduced.
La présente invention a encore pour objet un appareil de protection électrique comportant un dispositif de commande comportant les caractéristiques précédemment mentionnées prises seules ou en combinaison.The present invention also relates to an electrical protection apparatus comprising a control device comprising the previously mentioned features taken alone or in combination.
Avantageusement, cet appareil est un disjoncteur basse tension.Advantageously, this apparatus is a low-voltage circuit breaker.
Mais d'autres avantages et caractéristiques de l'invention apparaîtront mieux dans la description détaillée qui suit et se réfère aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels :
- La
figure 1 est une vue partielle, en plan, illustrant la partie intérieure d'un disjoncteur équipé d'un dispositif de commande selon une réalisation particulière de l'invention, en position ouverte des contacts de la manette, - Les
figures 2 et 3 sont deux vues en perspective d'une platine, disposées respectivement selon deux orientations différentes, avant la mise en place de l'insert selon l'invention, - La
figure 4 est une vue de face de l'insert selon l'invention, monté autour de la tige formant axe de rotation du crochet, - Les
figures 5 et 6 sont respectivement une vue de face et une vue en perspective de cette même platine après le montage de l'insert et de la tige dans la platine, et - Les
figures 7,8 et 9 sont des vues partielles en plan, illustrant une partie du mécanisme de commande, comportant en plus des éléments illustrés sur lesfigures 5 et 6 , le crochet, la bielle de transmission et le levier de déclenchement, respectivement en position ouverte, fermée ou déclenchée dudit mécanisme.
- The
figure 1 is a partial view, in plan, illustrating the inner part of a circuit breaker equipped with a control device according to a particular embodiment of the invention, in the open position of the contacts of the joystick, - The
Figures 2 and 3 are two perspective views of a plate, respectively arranged in two different orientations, before the introduction of the insert according to the invention, - The
figure 4 is a front view of the insert according to the invention, mounted around the rod forming the axis of rotation of the hook, - The
Figures 5 and 6 are respectively a front view and a perspective view of the same plate after mounting the insert and the rod in the plate, and - The
Figures 7,8 and 9 are partial plan views, illustrating part of the control mechanism, including in addition elements illustrated on theFigures 5 and 6 , the hook, the connecting rod and the trigger lever, respectively in the open position, closed or triggered said mechanism.
Sur la
Une ouverture 7 est prévue dans la face avant 8 du boîtier pour le passage d'une manette 6 montée à pivotement limité sur un axe 11 du boîtier entre une position de fermeture dans laquelle les contacts 4,5 sont fermés, et une position d'ouverture correspondant à la séparation des contacts 4,5. La manette 6 est équipée d'une embase interne 9 accouplée à une biellette de transmission 10 pour constituer un dispositif à genouillère dont l'articulation 12 se trouve excentrée par rapport à l'axe fixe 11 de la manette 6.
La manette 6 est sollicitée dans le sens trigonométrique vers la position d'ouverture des contacts par un ressort de rappel (non représenté). Le contact fixe 5 est solidarisé à la carcasse du déclencheur électromagnétique. Le contact mobile 4 est fixé au dispositif de support 3 du contact mobile 4, ledit support 3 étant articulé sur un pivot 40, la platine rotative 15 étant montée rotative autour du pivot 14.
Un levier de déclenchement 16 piloté par le percuteur du déclencheur électromagnétique, le bilame du déclencheur thermique (non représentée) ou un auxiliaire externe, est monté à pivotement sur un axe 17 porté par la platine 15 avec un décalage prédéterminé par rapport au pivot précité 14.On the
An
The
A triggering
Une liaison mécanique brisable est ménagée entre la biellette de transmission 10 et la platine 15 d'entraînement du dispositif de support 3 de contact 4.
En position verrouillée, la liaison autorise la commande manuelle du mécanisme par la manette 6. Le déplacement du levier de déclenchement 16 vers la position déclenchée sous l'action des déclencheurs, provoque la rupture momentanée de la liaison mécanique, entraînant le déclenchement automatique du mécanisme, indépendamment de la manette 6. Le levier de déclenchement 16 est associé à un ressort de rappel 27 destiné à assurer le rétablissement automatique de la liaison mécanique lorsque la manette 6 est actionnée vers la position d'ouverture, suite à un déclenchement du mécanisme sur défaut.
La liaison mécanique brisable comporte un crochet 19 monté à pivotement sur un axe 20 de la platine 15. A l'opposé de cet axe, le bec 21 (
Le crochet 19 comporte également une ouverture de forme en haricot ou de V 25 laquelle, avec les ouvertures 26 de la platine, sont destinées à autoriser la rotation de la platine porte-contact 15, lors d'un déclenchement, alors que la biellette 10 est bloquée par la manette 6, elle-même maintenue en position de fermeture des contacts. Pour une description plus détaillée du fonctionnement de ce dispositif, l'on se reportera au
Un ressort de polarisation 27 à deux branches 28,29 est installé autour de l'axe 17 sur le levier 16. L'une 28 des branches est destinée à ramener le levier de déclenchement 16 dans sa position initiale tandis que l'autre branche 29 polarise le crochet 19 dans une position préférentielle choisie de manière à créer entre le levier 16 et le crochet 19 un jeu suffisant pour permettre l'accrochage.
Selon l'invention et tel qu'illustré plus particulièrement sur les
De préférence, cet insert 30 est métallique. Selon la réalisation préférentielle décrite, cet insert 30 prend la forme d'un V fixé de préférence au moyen d'une soudure laser (
Selon cette réalisation préférentielle illustrée, cette tige 32 forme un axe autour duquel le crochet 19 est monté à rotation par rapport à la platine 15.
Les moyens de maintien en position de l'insert 30 par rapport à la platine 15 comportent un bossage 34 formé sur une face 35 de l'évidement 31 de la platine 15 destiné à recevoir l'insert, ce bossage étant destiné à venir en appui sur une face externe 36 de l'une des branches du V formé par l'insert. Ce bossage 31 est destiné à coopérer avec une portion en forme de pointe 37 prévue sur une autre face 38 de l'évidement 31, cet élément en forme de pointe étant destiné à être amené en appui sur une face interne 39 de cette même branche du V. Ce bossage 34 et cette pointe 37 permettent d'assurer en combinaison un maintien en position de l'insert 30 dans le logement 31 en assurant à cet insert 30 une position fixe par rapport à la platine 15.
Le montage de cet ensemble sur la platine 15 est le suivant :
- Tout d'abord, l'on réalise la fixation de la tôle 30 sur la tige 32, avantageusement au moyen d'une soudure laser ou tout autre moyen approprié. Puis cet ensemble est monté sur la platine 15 par le montage serré de la tige dans un orifice correspondant de cette platine.
In the locked position, the link allows the manual control of the mechanism by the
The breakable mechanical link comprises a
The
A
According to the invention and as illustrated more particularly on
Preferably, this
According to this preferred embodiment illustrated, this
The means for holding the
The assembly of this assembly on the
- First of all, the
sheet 30 is fastened to therod 32, advantageously by means of a laser weld or any other suitable means. Then this assembly is mounted on theplate 15 by the tight fitting of the rod in a corresponding hole of this plate.
Le fonctionnement du dispositif de commande tel que décrit ci-dessus va être décrit ci-après en référence aux figures.
Sur les
Dans cette position, la bielle de transmission 10 n'exerce aucun effort sur la platine.
Lorsque la manette 6 est actionnée pour réaliser la fermeture des contacts, celle-ci déplace la biellette 10 qui vient en appui sur la platine 15 par l'intermédiaire de l'insert 30, et sur le crochet 19. Le crochet 19 est verrouillé sur la barre (ou levier) de déclenchement 16. (
La biellette 10 en appui sur la platine 15 et sur le crochet 19, fait pivoter la platine 15 autour de son axe 20 jusqu'à la fermeture des contacts 4,5.
La biellette poursuit sa course jusqu'au franchissement du point mort de la genouillère formée par la manette 6 et la biellette 10. Puis, le mécanisme prend la position d'équilibre qui maintient les contacts 4,5 fermés, position illustrée sur la
Lorsque l'on souhaite ouvrir les contacts 4,5 manuellement, la manette 6 est actionnée jusqu'à ce qu'elle franchisse le point mort de la genouillère dans l'autre sens. Le mécanisme rejoint alors la position d'équilibre, les contacts étant ouverts, lorsque la manette atteint la fin de sa course, position représentée sur les
Lorsque les contacts sont fermés et que la barre ou levier de déclenchement 16 est actionnée, le crochet 19 est déverrouillé, mais la manette 6 ne revient pas tout de suite vers sa position d'ouverture.The operation of the control device as described above will be described hereinafter with reference to the figures.
On the
In this position, the
When the
The
The rod continues its race until the dead center of the toggle formed by the
When it is desired to open the contacts 4.5 manually, the
When the contacts are closed and the trigger bar or
L'équilibre des forces exercées par la biellette 10 sur le mécanisme est rompu. La platine 15 tourne autour de son axe 14 et elle ouvre les contacts, position représentée sur la
Puis, le ressort de la manette ramène cette dernière en position contacts ouverts et la biellette ramène le crochet en position initiale. Le ressort 27 de polarisation du crochet et de réarmement de la barre les replace dans une position permettant le verrouillage du crochet sur la barre lorsque la manette sera actionnée pour fermer les contacts. Les ouvertures 26 prévues dans la platine 15 participent au guidage de la biellette 10 de façon à la ramener en position d'appui sur la platine.
Ainsi, en position de fonctionnement normal du circuit électrique sans défaut dans le circuit, position illustrée sur la
Ainsi, le système comporte deux étages de démultiplication. Selon le premier, l'effort du mécanisme est repris en grande partie sur la platine et en plus faible partie sur le crochet. Selon le deuxième, par un jeu de bras de levier sur le crochet, l'effort est démultiplié sur le levier de déclenchement.The balance of forces exerted by the
Then, the spring of the joystick brings it in open contacts position and the rod returns the hook in the initial position. The biasing
Thus, in the normal operating position of the circuit without fault in the circuit, position illustrated on the
Thus, the system comprises two stages of reduction. According to the first, the force of the mechanism is taken up largely on the plate and in a smaller part on the hook. According to the second, by a set of lever arms on the hook, the force is multiplied on the trigger lever.
Grâce à la présence de cet insert métallique 30, le phénomène de matage de la platine 15 ne se produit plus, ce qui empêche la survenue d'efforts de déclenchement trop importants, voir l'absence de déclenchement 16. Lorsque l'invention est utilisée dans un appareil de protection électrique tel que décrit et illustré dans ce qui précède, dans lequel l'effort de la bielle est réparti à la fois sur la platine et sur le crochet, l'on obtient déjà un effort de déclenchement moins important sur la barre du fait de cette répartition de l'effort de la bielle. Ainsi, les efforts de déclenchement sont déjà réduits. Lors de l'utilisation d'un insert métallique selon l'invention dans un tel appareil, l'on obtient une réduction supplémentaire des efforts de déclenchement par le fait que le matage de la platine est empêché.
L'utilisation d'un tel insert est particulièrement avantageux lorsque l'effort exercé par la bielle est important, par exemple de 100N.
Dans de tels appareils, il était en général nécessaire de prévoir des dispositifs de protection différentielle spécifiques du fait que les efforts de déclenchement restaient importants
En réduisant encore ces efforts de déclenchement grâce à l'invention, il est alors possible d'utiliser des dispositifs de déclenchement standard.
L'invention s'applique donc avantageusement à de tels appareils dans lesquels l'effort de la biellette s'exerce à la fois sur la platine et sur le crochet, mais pas exclusivement. En effet, l'invention s'applique également avantageusement à des appareils dans lesquels l'effort de la biellette ne s'applique que sur la platine par exemple, avec pour résultats de réduire les efforts de déclenchement.
Ainsi, grâce à l'invention, l'on règle le problème d'absence de déclenchement des disjoncteurs grâce à un ensemble comportant une aiguille formant axe et une tôle en V facile à réaliser puis à assembler, cet ensemble permettant d'obtenir une réduction de 50% des efforts de déclenchement d'un disjoncteur présentant un calibre pouvant aller jusqu'à 120A.
On notera également que cette réduction des efforts de déclenchement permet également d'obtenir une amélioration du réglage thermique, par le fait que les efforts étant moins importants, il y a moins de difficultés à trouver la bonne nuance de bilame.Due to the presence of this
The use of such an insert is particularly advantageous when the force exerted by the rod is important, for example 100N.
In such devices, it was generally necessary to provide specific differential protection devices because the triggering forces remained important.
By further reducing these triggering forces by the invention, it is then possible to use standard trigger devices.
The invention therefore advantageously applies to such devices in which the force of the link is exerted both on the plate and on the hook, but not exclusively. Indeed, the invention also applies advantageously to devices in which the force of the link applies only to the plate for example, with the result of reducing the triggering forces.
Thus, thanks to the invention, it solves the problem of lack of tripping circuit breakers through a set comprising an axis needle and a V-shaped sheet easy to make and assemble, this set to obtain a reduction 50% of the tripping efforts of a circuit breaker with a rating of up to 120A.
It should also be noted that this reduction of the tripping forces also makes it possible to obtain an improvement in the thermal adjustment, because the efforts being less important, there is less difficulty in finding the right bimetal shade.
Claims (12)
- Device (2) for controlling an electrical protection unit housed in an insulating housing (1) containing a pair of fixed (5) and movable (4) contacts, said movable contact capable of being operated either manually via a control lever or automatically, comprising- a transmission link (10) coupled to the control lever,- a device (3) for supporting the movable contact comprising a plate (15) rotatably mounted on a pivot (14) and having a breakable mechanical connection with the transmission link, and- a trip lever (16) controlled by a tripping device in order to break the mechanical connection in the event of a fault, leading to the automatic release of the mechanism independently of the control lever and separation of the contacts,- the breakable mechanical connection being formed by a retaining notch (22) of the trip lever collaborating with a catch (19) pivotably mounted on a pin (20) of the plate (15), the breakage of the mechanical connection corresponding to unlocking of the catch, the transmission link (10), when the catch is in the locked position, resting at least on the plate,characterized in that it comprises a rigid insert (30) mounted on the plate (15) and intended to be inserted between the transmission link (10) and a zone of the plate (15) that constitutes a zone in which this link bears against the plate in the aforementioned locked position, and means (34, 37) for keeping this insert (30) in position with respect to said plate (15) without play.
- Control device according to Claim 1, characterized in that this rigid insert (30) comprises a piece of sheet metal substantially bent into a V shape, this sheet intended to be secured around a rod portion forming a shaft (32), this rod portion (32) intended to be solidly mounted in the plate (15) and extending substantially perpendicularly to the plane of said V.
- Control device according to Claim 2, characterized in that the aforementioned rod portion (32) is tightly fitted in the plate (15).
- Control device according to Claim 2 or 3, characterized in that the assembly of the aforementioned insert (30) on the rod portion (32) is made by laser welding.
- Control device according to any one of the preceding claims, characterized in that said insert (30) is mounted in a recess (31) formed in the plate (15), such that the plane in which extends said V is substantially parallel to the plane of one face (33) of the plate (15) located opposite the transmission link (10).
- Control device according to any one of Claims 1 to 5, characterized in that the aforementioned retaining means comprise a boss (34) provided on one face (35) of the aforementioned recess (31) and intended to abut against an outer face (36) of one of the branches of the aforementioned V, said boss (34) intended to serve as an angular reference to the assembly comprising the rod portion (32) and the insert (30), said boss (34) being intended to cooperate with a projecting part (37) belonging to another face (38) of said aforementioned recess (31), opposite the previous one, this projecting part (37) intended to bear against an inner face (39) of this same branch of the aforementioned V, opposite the aforementioned outer face (36), said boss (34) intended to serve as angular reference to the assembly comprising the rod portion (32) and the insert (30) relative to the axis of the rod (32), and the aforementioned projecting part (37) cooperating with the aforementioned boss (34) so as to produce a rotational locking of the insert (30) relative to the plate (15) about the axis of the aforementioned rod portion (32).
- Control device according to Claim 6, characterized in that this projecting part comprises a point (37).
- Control device according to any one of the preceding claims, characterized in that the aforementioned insert (30) is a metallic insert.
- Control device according to any one of the preceding claims, characterized in that the rod (32) is the needle around which the aforesaid catch (19) is rotatably mounted with respect to the plate (15).
- Control device according to any one of the preceding claims, characterized in that the above-mentioned transmission link (10) is supported on both the catch (19) and the plate (15) in the locking position of the catch (19).
- Electrical protection unit comprising a control device according to any of the preceding claims.
- Electric protection unit according to Claim 11, characterized in that it is a low voltage circuit breaker.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1554089A FR3036000B1 (en) | 2015-05-07 | 2015-05-07 | DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION DEVICE AND ELECTRICAL PROTECTION APPARATUS COMPRISING IT |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3091557A1 EP3091557A1 (en) | 2016-11-09 |
EP3091557B1 true EP3091557B1 (en) | 2017-08-02 |
Family
ID=53879625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16164270.7A Active EP3091557B1 (en) | 2015-05-07 | 2016-04-07 | Device for controlling an electrical protection unit and electrical protection unit comprising same |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3091557B1 (en) |
CN (1) | CN106128880B (en) |
ES (1) | ES2645429T3 (en) |
FR (1) | FR3036000B1 (en) |
RU (1) | RU2703985C2 (en) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3009682A1 (en) * | 1979-04-26 | 1980-11-06 | Weber Ag Fab Elektro | MULTIPOLE CIRCUIT BREAKER |
FR2589627B1 (en) | 1985-10-31 | 1988-08-26 | Merlin Gerin | CONTROL MECHANISM FOR LOW VOLTAGE ELECTRIC CIRCUIT BREAKER |
FR2616583B1 (en) | 1987-06-09 | 1995-01-06 | Merlin Gerin | CONTROL MECHANISM OF A MINIATURE ELECTRIC CIRCUIT BREAKER |
FR2914485B1 (en) * | 2007-03-29 | 2009-04-24 | Schneider Electric Ind Sas | DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION APPARATUS AND ELECTRICAL PROTECTION APPARATUS HAVING THE SAME |
KR100882399B1 (en) * | 2007-08-20 | 2009-02-05 | 엘에스산전 주식회사 | Circuit breaker having automatic release linkage and automatic release linkage used therein |
CN202076199U (en) * | 2011-04-15 | 2011-12-14 | 浙江科都电气制造有限公司 | Bipolar circuit breaker |
KR101258030B1 (en) * | 2011-12-02 | 2013-04-24 | 현대중공업 주식회사 | Trip unit with pressurized stick-slip and circuit breaker having the same |
EP2608233A1 (en) * | 2011-12-23 | 2013-06-26 | Abb Ag | Electrical load interrupter for low voltage |
FR2996678B1 (en) * | 2012-10-05 | 2014-10-31 | Schneider Electric Ind Sas | DEVICE FOR CONTROLLING AN ELECTRICAL PROTECTION DEVICE AND ELECTRICAL PROTECTION APPARATUS COMPRISING IT |
CN202940201U (en) * | 2012-10-26 | 2013-05-15 | 东莞基业电气设备有限公司 | Operating mechanism of miniature circuit breaker |
CN104134588B (en) * | 2014-07-17 | 2016-03-02 | 正泰集团股份有限公司 | A kind of operating means of multipole small-size circuit breaker |
CN104319203B (en) * | 2014-11-13 | 2017-08-25 | 杭州泰姆电气有限公司 | Circuit breaker operation mechanism |
-
2015
- 2015-05-07 FR FR1554089A patent/FR3036000B1/en not_active Expired - Fee Related
-
2016
- 2016-04-07 ES ES16164270.7T patent/ES2645429T3/en active Active
- 2016-04-07 EP EP16164270.7A patent/EP3091557B1/en active Active
- 2016-05-05 CN CN201610294869.0A patent/CN106128880B/en active Active
- 2016-05-06 RU RU2016117753A patent/RU2703985C2/en active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
CN106128880B (en) | 2019-11-15 |
CN106128880A (en) | 2016-11-16 |
EP3091557A1 (en) | 2016-11-09 |
RU2703985C2 (en) | 2019-10-23 |
RU2016117753A3 (en) | 2019-09-23 |
FR3036000B1 (en) | 2017-04-21 |
FR3036000A1 (en) | 2016-11-11 |
ES2645429T3 (en) | 2017-12-05 |
RU2016117753A (en) | 2017-11-10 |
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