EP0737991A1 - Electric apparatus, especially circuit breaker provided with a security device - Google Patents

Electric apparatus, especially circuit breaker provided with a security device Download PDF

Info

Publication number
EP0737991A1
EP0737991A1 EP96410025A EP96410025A EP0737991A1 EP 0737991 A1 EP0737991 A1 EP 0737991A1 EP 96410025 A EP96410025 A EP 96410025A EP 96410025 A EP96410025 A EP 96410025A EP 0737991 A1 EP0737991 A1 EP 0737991A1
Authority
EP
European Patent Office
Prior art keywords
contacts
stop
opening
lever
position corresponding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96410025A
Other languages
German (de)
French (fr)
Other versions
EP0737991B1 (en
Inventor
Michel Lazareth
Philippe Delcambre
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.)
Schneider Electric Industries SAS
Original Assignee
Schneider Electric SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schneider Electric SE filed Critical Schneider Electric SE
Publication of EP0737991A1 publication Critical patent/EP0737991A1/en
Application granted granted Critical
Publication of EP0737991B1 publication Critical patent/EP0737991B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H01H2009/288—Provisions relating to welded contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
    • H01H9/281—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock

Definitions

  • the present invention relates to an electrical device, and in particular a circuit breaker equipped with a safety device, this device being arranged to prevent padlocking in the event of welding of a movable contact on a fixed contact following a short circuit, this device being equipped with a manual control lever arranged to be brought by rotation about an axis, either in a normal open position corresponding to the opening of said contacts, or in a normal closed position corresponding to the closing of said contacts , and a control mechanism which transmits control of said lever to a pivoting arm carrying said movable contact.
  • the present invention aims to eliminate this danger by equipping the electrical appliance concerned with an adequate safety device.
  • the electrical device according to the invention characterized in that the safety device comprises a stop serving as a stop for said control lever, this stop being offset angularly, relative to a position corresponding to the position. normal opening, of an angle sufficient for the force applied to this lever to bring it to bear against this stop is greater than or equal to a predetermined threshold when said contacts are welded.
  • said predetermined threshold corresponds to a breaking force of essential components of the apparatus, and said breaking force is defined by a standard.
  • the drum carrying the control handle has a recess which is arranged to coincide with an opening formed in the side walls of a housing of the device, to allow said padlocking, said opening is angularly offset with respect to the position occupied by said recess when the lever is in the position corresponding to the application of a force whose value is equivalent to said predetermined threshold when said contacts are welded.
  • the partially shown device in this case a circuit breaker 10, comprises a pair of contacts, one of which 11 is fixed and mounted on a support 12 which is connected, in a non- shown, at one of the terminals of the circuit breaker and the other of which 13 is movable.
  • This movable contact is arranged at one end of an arm 14 pivoting about an axis 15, called a movable contact arm.
  • the axis 15 is mounted on a plate 16 which also carries a hooking hook 17 articulated on an axis 18 integral with the plate 16.
  • the hooking hook is linked to one end of a link 19, this end being articulated at a point 20 on said hook, the other end of the link 19 being articulated at a point 21 on a drum 22 rotating around an axis 23 which carries a lever 24 for manual control.
  • the drum 22 is housed in an appropriate cavity of the circuit breaker housing and has a recess 25 which, when the contacts are open and the lever is brought into abutment against a stop integral with said housing, coincides with an opening 27 formed through the side walls of this housing to allow the passage of a sealing wire 28, the handle of a padlock or other locking device.
  • the configuration of the components as shown in FIG. 1 corresponds to a normal situation, the contacts being free, not welded, and the lever with manual control acting through the control mechanism, correctly on the movable contact.
  • FIG. 2 shows this same device 10 when the contacts 11 and 13 are soldered following a short circuit. It can be seen that, although the contacts are closed, the handle 24 for manual control has been able to be brought to bear against the stop 26 and that the recess 25 has been brought opposite the opening 27 made in the side walls of the housing so that the lockout operation was made possible. To reach this state, the operator had to force the lever, which has the effect of deforming the link 19.
  • the applied force is less than a limit value, or threshold defined by a standard. Beyond this threshold, the applied force causes a complete rupture of the mechanism but, below this threshold, the applied force causes only a deformation of the link which does not allow the operator to realize danger due to the non-de-energization of the circuit.
  • the device 30 shown in this case a circuit breaker, comprises as before a fixed contact 31 mounted on a support 32, a movable contact 33 disposed at one end of an arm 34 pivoting around an axis 35.
  • This axis is carried by a plate 36 which also carries a hook 37 articulated on an axis 38 integral with this plate.
  • a link 39 is linked at a point 40 to said hook 37 and at a point 41 to a drum 42, rotatable about an axis 43, which carries a lever 44 for manual control.
  • the drum 42 is provided with a recess 45 which, when the contacts 31 and 33 are open and the lever is brought into abutment against a stop 46 secured to the housing (not shown) of the device, coincides with an opening 47 formed through the side walls of this box to allow the passage of a sealing wire 48 or the handle of a padlock.
  • the configuration of the components as shown in FIG. 3 corresponds to a normal situation, the contacts 31 and 33 being free, not welded, and the manual control lever 44 acting correctly on the movable contact, through the control mechanism.
  • FIG. 4 shows the device 30 in a configuration where the contacts 31 and 33 are soldered following a short circuit.
  • the handle 44 is in an intermediate position without deformation of the link 39.
  • the recess 45 does not coincide with the opening 47, so that a padlocking of the device is not possible.
  • the device When the operator exerts a force on the lever 44 in the opening direction, the device can be brought into a position which corresponds to that of FIG. 5.
  • the configuration shown corresponds to a limit force, or threshold normalized in below which the mechanism is not completely destroyed, and beyond which the essential components of the mechanism are damaged. It is noted that, in this case, the manual control lever 44 is not in abutment against the stop 46 and that the recess 45 does not coincide with the opening 47 so that padlocking of the device does not is not possible. If the operator pushes the joystick by applying a force which is greater than said threshold, deterioration of essential components of the apparatus is inevitable.
  • Figure 6 shows the device in the unlocked open position, following normal triggering. Note that the recess does not coincide with the opening 47, preventing padlocking. The latter is only possible if the lever 44 is pressed against the stop 46.
  • FIG. 6 it is possible to provide a compression spring 50 which is mounted in such a way that it tends to oppose the movement of the lever 44 in its final phase, that is to say towards the support against the stop 46, when the contacts 31 and 33 are free.
  • the spring 50 opposes a determined resistance on the lever in the displacement phase in which the contacts are already open, but where the lockout position is not yet reached. This resistance makes it possible to make the user attentive to his approach by forcing him to press his effort on the joystick.
  • the spring could be replaced by a friction, or any other member having the same functions, making it possible to attract the attention of the user.

Landscapes

  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Braking Systems And Boosters (AREA)
  • Braking Arrangements (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

The circuit breaker includes the mechanism which prevents a short circuit locking the circuit breaker solid. The mechanically driven arm (44) drives the drum. The drum drives an arm (39) in turning opening and closing the contact breaker arm (34) and contacts (31,33). The drum has a circular notch in it (45) holding a solid section (47). When the drum and the solid section separate, because of the contacts solidifying a mechanical chain of events is initiated to apply a predetermined force above that required to break the solidified contact connection.

Description

La présente invention concerne un appareil électrique, et notamment un disjoncteur équipé d'un dispositif de sécurité, ce dispositif étant agencé pour empêcher un cadenassage en cas de soudure d'un contact mobile sur un contact fixe suite à un court-circuit, cet appareil étant équipé d'une manette de commande manuelle agencée pour être amenée par rotation autour d'un axe, soit dans une position normale d'ouverture correspondant à l'ouverture desdits contacts, soit dans une position normale de fermeture correspondant à la fermeture desdits contacts, et d'un mécanisme de commande qui transmet la commande de ladite manette à un bras pivotant portant ledit contact mobile.The present invention relates to an electrical device, and in particular a circuit breaker equipped with a safety device, this device being arranged to prevent padlocking in the event of welding of a movable contact on a fixed contact following a short circuit, this device being equipped with a manual control lever arranged to be brought by rotation about an axis, either in a normal open position corresponding to the opening of said contacts, or in a normal closed position corresponding to the closing of said contacts , and a control mechanism which transmits control of said lever to a pivoting arm carrying said movable contact.

Suite à un court-circuit, il peut arriver que les contacts électriques d'un disjoncteur soient soudés. Or, on a constaté qu'un opérateur peut arriver à ouvrir la manette de commande manuelle et l'amener dans une position de verrouillage couramment appelée position de cadenassage, bien que les contacts soudés restent fermés. Ceci implique bien entendu une déformation du mécanisme de commande de l'ouverture des contacts. Néanmoins, la force requise pour générer cette déformation est raisonnable et ne dépasse pas un certain seuil de rupture des composants du mécanisme, et notamment un vrillage de la barre de couplage de plusieurs manettes lorsque plusieurs disjoncteurs sont couplés en série. De ce fait, l'opérateur court un danger puisqu'il a déplacé la manette en position d'ouverture des contacts, en croyant de ce fait qu'il a interrompu le circuit de puissance, alors que ces contacts soudés restent fermés, ce qui maintient le circuit sous tension.Following a short circuit, it may happen that the electrical contacts of a circuit breaker are soldered. However, it has been found that an operator can manage to open the manual control lever and bring it into a locking position commonly called padlocking position, although the welded contacts remain closed. This of course implies a deformation of the mechanism for controlling the opening of the contacts. However, the force required to generate this deformation is reasonable and does not exceed a certain rupture threshold of the components of the mechanism, and in particular a twist of the coupling bar of several levers when several circuit breakers are coupled in series. As a result, the operator is in danger since he has moved the lever to the open position of the contacts, thereby believing that he has interrupted the power circuit, while these welded contacts remain closed, which keeps the circuit energized.

La présente invention a pour objectif d'éliminer ce danger en équipant l'appareil électrique concerné d'un dispositif de sécurité adéquat. Ce but est atteint par l'appareil électrique selon l'invention, caractérisé en ce que le dispositif de sécurité comporte une butée servant d'arrêt à ladite manette de commande, cette butée étant décalée angulairement, par rapport à une position correspondant à la position normale d'ouverture, d'un angle suffisant pour que la force appliquée sur cette manette pour l'amener en appui contre cette butée soit supérieure ou égale à un seuil prédéterminé lorsque lesdits contacts sont soudés.The present invention aims to eliminate this danger by equipping the electrical appliance concerned with an adequate safety device. This object is achieved by the electrical device according to the invention, characterized in that the safety device comprises a stop serving as a stop for said control lever, this stop being offset angularly, relative to a position corresponding to the position. normal opening, of an angle sufficient for the force applied to this lever to bring it to bear against this stop is greater than or equal to a predetermined threshold when said contacts are welded.

De préférence, ledit seuil prédéterminé correspond à une force de rupture de composants essentiels de l'appareil, et ladite force de rupture est définie par une norme.Preferably, said predetermined threshold corresponds to a breaking force of essential components of the apparatus, and said breaking force is defined by a standard.

Dans un mode de réalisation préféré de l'appareil où le tambour portant la manette de commande comporte un évidement qui est agencé pour coïncider avec une ouverture ménagée dans des parois latérales d'un boîtier de l'appareil, pour permettre ledit cadenassage, ladite ouverture est angulairement décalée par rapport à la position qu'occupe ledit évidement lorsque la manette est dans la position correspondant à l'application d'une force dont la valeur équivaut audit seuil prédéterminé lorsque lesdits contacts sont soudés.In a preferred embodiment of the apparatus where the drum carrying the control handle has a recess which is arranged to coincide with an opening formed in the side walls of a housing of the device, to allow said padlocking, said opening is angularly offset with respect to the position occupied by said recess when the lever is in the position corresponding to the application of a force whose value is equivalent to said predetermined threshold when said contacts are welded.

La présente invention sera mieux comprise en référence à la description d'exemples de réalisation donnés à titre d'exemples non limitatifs et aux dessins annexés dans lesquels :

  • la figure 1 représente une vue partielle d'un appareil électrique de l'art antérieur, dans laquelle les contacts sont ouverts et la manette est en position d'ouverture et de cadenassage,
  • la figure 2 représente une vue similaire à celle de la figure 1, mais dans laquelle les contacts sont soudés,
  • la figure 3 représente une vue partielle d'un appareil électrique selon l'invention, dans laquelle les contacts sont ouverts et la manette est en position d'ouverture et de cadenassage,
  • la figure 4 représente une vue similaire à celle de la figure 3, mais dans laquelle les contacts sont soudés et où la manette est amenée sans effet dans une première position intermédiaire,
  • la figure 5 représente une vue similaire à celle de la figure 4, mais dans laquelle la manette est amenée avec un effort limité dans une deuxième position intermédiaire, et
  • la figure 6 est une vue similaire à celle de la figure 3, dans la position ouvert non cadenassé.
The present invention will be better understood with reference to the description of exemplary embodiments given by way of nonlimiting examples and to the appended drawings in which:
  • FIG. 1 represents a partial view of an electrical device of the prior art, in which the contacts are open and the lever is in the open and padlocked position,
  • FIG. 2 represents a view similar to that of FIG. 1, but in which the contacts are welded,
  • FIG. 3 represents a partial view of an electrical device according to the invention, in which the contacts are open and the lever is in the open and padlocked position,
  • FIG. 4 represents a view similar to that of FIG. 3, but in which the contacts are welded and in which the lever is brought without effect into a first intermediate position,
  • FIG. 5 represents a view similar to that of FIG. 4, but in which the lever is brought with a limited force into a second intermediate position, and
  • Figure 6 is a view similar to that of Figure 3, in the open position not padlocked.

En référence aux figures 1 et 2, l'appareil partiellement représenté, en l'occurrence un disjoncteur 10, comporte une paire de contacts, dont l'un 11 est fixe et monté sur un support 12 qui est raccordé, d'une manière non représentée, à l'une des bornes du disjoncteur et dont l'autre 13 est mobile. Ce contact mobile est disposé à une extrémité d'un bras 14 pivotant autour d'un axe 15, appelé bras de contact mobile. L'axe 15 est monté sur une platine 16 qui porte également un crochet d'accrochage 17 articulé sur un axe 18 solidaire de la platine 16. Le crochet d'accrochage est lié à une extrémité d'une biellette 19, cette extrémité étant articulée en un point 20 sur ledit crochet d'accrochage, l'autre extrémité de la biellette 19 étant articulée en un point 21 sur un tambour 22 rotatif autour d'un axe 23 qui porte une manette 24 de commande manuelle. Le tambour 22 est logé dans une cavité appropriée du boîtier du disjoncteur et comporte un évidement 25 qui, lorsque les contacts sont ouverts et que la manette est amenée en appui contre une butée solidaire dudit boîtier, coïncide avec une ouverture 27 ménagée à travers les parois latérales de ce boîtier pour permettre le passage d'un fil de plombage 28, de l'anse d'un cadenas ou de tout autre dispositif de verrouillage. La configuration des composants telle que représentée par la figure 1, correspond à une situation normale, les contacts étant libres, non soudés, et la manette à commande manuelle agissant au travers du mécanisme de commande, correctement sur le contact mobile.Referring to Figures 1 and 2, the partially shown device, in this case a circuit breaker 10, comprises a pair of contacts, one of which 11 is fixed and mounted on a support 12 which is connected, in a non- shown, at one of the terminals of the circuit breaker and the other of which 13 is movable. This movable contact is arranged at one end of an arm 14 pivoting about an axis 15, called a movable contact arm. The axis 15 is mounted on a plate 16 which also carries a hooking hook 17 articulated on an axis 18 integral with the plate 16. The hooking hook is linked to one end of a link 19, this end being articulated at a point 20 on said hook, the other end of the link 19 being articulated at a point 21 on a drum 22 rotating around an axis 23 which carries a lever 24 for manual control. The drum 22 is housed in an appropriate cavity of the circuit breaker housing and has a recess 25 which, when the contacts are open and the lever is brought into abutment against a stop integral with said housing, coincides with an opening 27 formed through the side walls of this housing to allow the passage of a sealing wire 28, the handle of a padlock or other locking device. The configuration of the components as shown in FIG. 1 corresponds to a normal situation, the contacts being free, not welded, and the lever with manual control acting through the control mechanism, correctly on the movable contact.

La figure 2 représente ce même appareil 10 lorsque les contacts 11 et 13 sont soudés suite à un court-circuit. On constate que, bien que les contacts soient fermés, la manette 24 de commande manuelle a pu être amenée en appui contre la butée 26 et que l'évidement 25 a été amené en regard de l'ouverture 27 ménagée dans les parois latérales du boîtier de sorte que l'opération de cadenassage a été rendue possible. Pour arriver dans cet état, l'opérateur a dû forcer la manette, ce qui a pour effet une déformation de la biellette 19. La force appliquée est inférieure à une valeur limite, ou seuil défini par une norme. Au-delà de ce seuil, la force appliquée entraîne une rupture complète du mécanisme mais, en-deçà de ce seuil, la force appliquée n'engendre qu'une déformation de la biellette qui ne permet pas à l'opérateur de se rendre compte du danger dû à la non-mise hors tension du circuit.FIG. 2 shows this same device 10 when the contacts 11 and 13 are soldered following a short circuit. It can be seen that, although the contacts are closed, the handle 24 for manual control has been able to be brought to bear against the stop 26 and that the recess 25 has been brought opposite the opening 27 made in the side walls of the housing so that the lockout operation was made possible. To reach this state, the operator had to force the lever, which has the effect of deforming the link 19. The applied force is less than a limit value, or threshold defined by a standard. Beyond this threshold, the applied force causes a complete rupture of the mechanism but, below this threshold, the applied force causes only a deformation of the link which does not allow the operator to realize danger due to the non-de-energization of the circuit.

En référence à la figure 3, l'appareil 30 représenté, en l'occurrence un disjoncteur, comporte comme précédemment un contact fixe 31 monté sur un support 32, un contact mobile 33 disposé à une extrémité d'un bras 34 pivotant autour d'un axe 35. Cet axe est porté par une platine 36 qui porte également un crochet d'accrochage 37 articulé sur un axe 38 solidaire de cette platine. Une biellette 39 est liée en un point 40 audit crochet d'accrochage 37 et en un point 41 à un tambour 42, rotatif autour d'un axe 43, qui porte une manette 44 de commande manuelle. Le tambour 42 est pourvu d'un évidement 45 qui, lorsque les contacts 31 et 33 sont ouverts et que la manette est amenée en appui contre une butée 46 solidaire du boîtier (non représenté) de l'appareil, coïncide avec une ouverture 47 ménagée à travers les parois latérales de ce boîtier pour permettre le passage d'un fil de plombage 48 ou de l'anse d'un cadenas.With reference to FIG. 3, the device 30 shown, in this case a circuit breaker, comprises as before a fixed contact 31 mounted on a support 32, a movable contact 33 disposed at one end of an arm 34 pivoting around an axis 35. This axis is carried by a plate 36 which also carries a hook 37 articulated on an axis 38 integral with this plate. A link 39 is linked at a point 40 to said hook 37 and at a point 41 to a drum 42, rotatable about an axis 43, which carries a lever 44 for manual control. The drum 42 is provided with a recess 45 which, when the contacts 31 and 33 are open and the lever is brought into abutment against a stop 46 secured to the housing (not shown) of the device, coincides with an opening 47 formed through the side walls of this box to allow the passage of a sealing wire 48 or the handle of a padlock.

Par rapport à l'appareil représenté par la figure 1, l'appareil de la figure 3 présente les modifications suivantes :

  • la butée 46 a été déplacée angulairement d'un angle α par rapport à la position occupée par la butée 26 (représentée schématiquement en traits interrompus sur la figure 3);
  • l'ouverture 47 ménagée à travers les parois latérales du boîtier a été déplacée angulairement d'un angle α par rapport à la position occupée par la butée 27 (représentée schématiquement en traits interrompus sur la figure 3).
Compared to the device shown in Figure 1, the device of Figure 3 has the following modifications:
  • the stop 46 has been angularly displaced by an angle α relative to the position occupied by the stop 26 (shown diagrammatically in broken lines in FIG. 3);
  • the opening 47 formed through the side walls of the housing has been angularly displaced by an angle α with respect to the position occupied by the stop 27 (shown diagrammatically in broken lines in FIG. 3).

La configuration des composants telle que représentée par la figure 3, correspond à une situation normale, les contacts 31 et 33 étant libres, non soudés, et la manette 44 de commande manuelle agissant correctement sur le contact mobile, au travers du mécanisme de commande.The configuration of the components as shown in FIG. 3 corresponds to a normal situation, the contacts 31 and 33 being free, not welded, and the manual control lever 44 acting correctly on the movable contact, through the control mechanism.

La figure 4 représente l'appareil 30 dans une configuration où les contacts 31 et 33 sont soudés suite à un court-circuit.. La manette 44 se trouve dans une position intermédiaire sans déformation de la biellette 39. L'évidement 45 ne coïncide pas avec l'ouverture 47, de sorte qu'un cadenassage de l'appareil n'est pas possible.FIG. 4 shows the device 30 in a configuration where the contacts 31 and 33 are soldered following a short circuit. The handle 44 is in an intermediate position without deformation of the link 39. The recess 45 does not coincide with the opening 47, so that a padlocking of the device is not possible.

Lorsque l'opérateur exerce un effort sur la manette 44 dans le sens de l'ouverture, l'appareil peut être amené dans une position qui correspond à celle de la figure 5. La configuration représentée correspond à une force limite, ou seuil normalisé en-deçà duquel le mécanisme n'est pas complètement détruit, et au-delà duquel les composants essentiels du mécanisme sont détériorés. On constate que, dans ce cas, la manette 44 de commande manuelle n'est pas en appui contre la butée 46 et que l'évidement 45 ne coïncide pas avec l'ouverture 47 de sorte qu'un cadenassage de l'appareil n'est pas possible. Si l'opérateur pousse la manette en appliquant une force qui est supérieure audit seuil, la détérioration de composants essentiels de l'appareil est inévitable.When the operator exerts a force on the lever 44 in the opening direction, the device can be brought into a position which corresponds to that of FIG. 5. The configuration shown corresponds to a limit force, or threshold normalized in below which the mechanism is not completely destroyed, and beyond which the essential components of the mechanism are damaged. It is noted that, in this case, the manual control lever 44 is not in abutment against the stop 46 and that the recess 45 does not coincide with the opening 47 so that padlocking of the device does not is not possible. If the operator pushes the joystick by applying a force which is greater than said threshold, deterioration of essential components of the apparatus is inevitable.

La figure 6 montre l'appareil dans la position d'ouverture non cadenassé, suite à un déclenchement normal. On remarque que l'évidement ne coïncide pas avec l'ouverture 47, en empêchant le cadenassage. Ce dernier n'est possible que si on pousse la manette 44 en appui contre la butée 46.Figure 6 shows the device in the unlocked open position, following normal triggering. Note that the recess does not coincide with the opening 47, preventing padlocking. The latter is only possible if the lever 44 is pressed against the stop 46.

Sur la figure 6, il est possible de prévoir un ressort de compression 50 qui est monté de telle manière qu'il tend à s'opposer au déplacement de la manette 44 dans sa phase finale, c'est-à-dire vers l'appui contre la butée 46, lorsque les contacts 31 et 33 sont libres. Le ressort 50 oppose une résistance déterminée sur la manette dans la phase de déplacement dans laquelle les contacts sont d'ores et déjà ouverts, mais où la position de cadenassage n'est pas encore atteinte. Cette résistance permet de rendre l'utilisateur attentif à sa démarche en l'obligeant à appuyer son effort sur la manette.In FIG. 6, it is possible to provide a compression spring 50 which is mounted in such a way that it tends to oppose the movement of the lever 44 in its final phase, that is to say towards the support against the stop 46, when the contacts 31 and 33 are free. The spring 50 opposes a determined resistance on the lever in the displacement phase in which the contacts are already open, but where the lockout position is not yet reached. This resistance makes it possible to make the user attentive to his approach by forcing him to press his effort on the joystick.

Il est bien évident que le ressort pourrait être remplacé par une friction, ou tout autre organe ayant les mêmes fonctions, permettant d'attirer l'attention de l'utilisateur.It is obvious that the spring could be replaced by a friction, or any other member having the same functions, making it possible to attract the attention of the user.

Claims (6)

Appareil électrique, et notamment disjoncteur équipé d'un dispositif de sécurité, ce dispositif étant agencé pour empêcher un cadenassage en cas de soudure d'un contact mobile (33) sur un contact fixe (31) suite à un court-circuit, cet appareil étant équipé d'une manette de commande (44) manuelle agencée pour être amenée par rotation autour d'un axe, soit dans une position normale d'ouverture correspondant à l'ouverture desdits contacts, soit dans une position normale de fermeture correspondant à la fermeture desdits contacts, et d'un mécanisme de commande qui transmet la commande de ladite manette à un bras pivotant (34) portant ledit contact mobile, caractérisé en ce que le dispositif de sécurité comporte une butée (46) servant d'arrêt à ladite manette de commande (44), cette butée étant décalée angulairement, par rapport à une position correspondant à la position normale d'ouverture, d'un angle suffisant pour que la force appliquée sur cette manette pour l'amener en appui contre cette butée soit supérieure ou égale à un seuil prédéterminé lorsque lesdits contacts sont soudés.Electrical device, and in particular a circuit breaker equipped with a safety device, this device being arranged to prevent padlocking in the event of welding of a movable contact (33) on a fixed contact (31) following a short circuit, this device being equipped with a manual control lever (44) arranged to be brought by rotation about an axis, either in a normal opening position corresponding to the opening of said contacts, or in a normal closing position corresponding to the closing of said contacts, and of a control mechanism which transmits the command from said lever to a pivoting arm (34) carrying said movable contact, characterized in that the safety device comprises a stop (46) serving to stop said control handle (44), this stop being angularly offset, with respect to a position corresponding to the normal open position, by an angle sufficient for the force applied to this handle to bring it to bear against this stop is greater than or equal to a predetermined threshold when said contacts are welded. Appareil selon la revendication 1, caractérisé en ce que ledit seuil prédéterminé correspond à une force de rupture de composants essentiels de l'appareil.Apparatus according to claim 1, characterized in that said predetermined threshold corresponds to a breaking force of essential components of the apparatus. Appareil selon la revendication 2, caractérisé en ce que ladite force de rupture est définie par une norme.Apparatus according to claim 2, characterized in that said breaking force is defined by a standard. Appareil selon la revendication 1, dans lequel le tambour (42) portant la manette de commande comporte un évidement qui est agencé pour coïncider avec une ouverture ménagée dans des parois latérales d'un boîtier de l'appareil, pour permettre ledit cadenassage, caractérisé en ce que ladite ouverture (47) est angulairement décalée par rapport à la position qu'occupe ledit évidement (45) lorsque la manette (44) est dans la position correspondant à l'application d'une force dont la valeur équivaut audit seuil prédéterminé lorsque lesdits contacts (31, 33) sont soudés.Apparatus according to claim 1, wherein the drum (42) carrying the control handle has a recess which is arranged to coincide with an opening in the side walls of a housing of the apparatus, to allow said padlocking, characterized in that said opening (47) is angularly offset from the position occupied by said recess (45) when the lever (44) is in the position corresponding to the application of a force whose value is equivalent to said predetermined threshold when said contacts (31, 33) are welded. Appareil selon les revendications 1 et 4, caractérisé en ce que lesdits décalages angulaires de la butée (46) et de l'ouverture (47) sont sensiblement égaux.Apparatus according to claims 1 and 4, characterized in that said angular offsets of the stop (46) and the opening (47) are substantially equal. Appareil selon la revendication 1, caractérisé en ce qu'il comporte un organe élastique agencé pour opposer une résistance déterminée sur la manette de commande manuelle (44) dans une phase de déplacement de cette dernière tendant à l'amener dans la position de cadenassage.Apparatus according to claim 1, characterized in that it comprises an elastic member arranged to oppose a determined resistance on the manual control lever (44) in a phase of displacement of the latter tending to bring it into the lockout position.
EP96410025A 1995-04-13 1996-03-19 Electric apparatus, especially circuit breaker provided with a security device Expired - Lifetime EP0737991B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9504679 1995-04-13
FR9504679A FR2733087B1 (en) 1995-04-13 1995-04-13 ELECTRICAL APPARATUS AND IN PARTICULAR CIRCUIT-BREAKER EQUIPPED WITH A SAFETY DEVICE

Publications (2)

Publication Number Publication Date
EP0737991A1 true EP0737991A1 (en) 1996-10-16
EP0737991B1 EP0737991B1 (en) 2002-06-12

Family

ID=9478253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96410025A Expired - Lifetime EP0737991B1 (en) 1995-04-13 1996-03-19 Electric apparatus, especially circuit breaker provided with a security device

Country Status (7)

Country Link
EP (1) EP0737991B1 (en)
CN (1) CN1056705C (en)
AT (1) ATE219282T1 (en)
DE (1) DE69621695T2 (en)
ES (1) ES2176422T3 (en)
FR (1) FR2733087B1 (en)
HU (1) HU218957B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143477A1 (en) * 2000-04-07 2001-10-10 Hager Electro S.A. Safety device for an electrical apparatus like a circuit-breaker type

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE262732T1 (en) * 1999-12-21 2004-04-15 Hager Electro SAFETY DEVICE FOR ELECTRICAL DEVICE
DE102010020987B4 (en) 2010-05-19 2012-04-05 Eaton Industries Gmbh Circuit breaker with locking device
KR102007779B1 (en) * 2018-02-06 2019-08-07 엘에스산전 주식회사 Switchgear having earth switch

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408466A2 (en) * 1989-07-11 1991-01-16 Merlin Gerin Operating mechanism for an electric switch
EP0450699A2 (en) * 1990-04-04 1991-10-09 GE Power Controls Italia S.p.a. Enabling means for locking, by a padlock, hand control devices of electromechanical equipments

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408466A2 (en) * 1989-07-11 1991-01-16 Merlin Gerin Operating mechanism for an electric switch
EP0450699A2 (en) * 1990-04-04 1991-10-09 GE Power Controls Italia S.p.a. Enabling means for locking, by a padlock, hand control devices of electromechanical equipments

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1143477A1 (en) * 2000-04-07 2001-10-10 Hager Electro S.A. Safety device for an electrical apparatus like a circuit-breaker type

Also Published As

Publication number Publication date
HU218957B (en) 2001-01-29
HUP9600942A3 (en) 1999-04-28
ATE219282T1 (en) 2002-06-15
CN1139287A (en) 1997-01-01
FR2733087B1 (en) 1997-06-06
HUP9600942A2 (en) 1997-05-28
FR2733087A1 (en) 1996-10-18
CN1056705C (en) 2000-09-20
EP0737991B1 (en) 2002-06-12
DE69621695T2 (en) 2002-12-05
ES2176422T3 (en) 2002-12-01
DE69621695D1 (en) 2002-07-18
HU9600942D0 (en) 1996-06-28

Similar Documents

Publication Publication Date Title
EP0610143B1 (en) Mechanical and electrical locking device for a remote control unit of a modular circuit breaker
EP0766280A2 (en) Control and signal device for a protection circuit breaker
EP0161946B1 (en) Auxiliary module for connection to a circuit breaker
FR2863403A1 (en) Electrical protection apparatus e.g. circuit breaker, tripping signaling device, has moving unit activating signaling unit to signal tripping state of circuit breaker, when opening of fixed and movable contacts is due to electric fault
EP0737991B1 (en) Electric apparatus, especially circuit breaker provided with a security device
EP0547928B1 (en) Protective switch
EP2717284B1 (en) Operating device of an electric protection apparatus and electric protection apparatus comprising same
EP2377139B1 (en) Remote control device and circuit breaker with such device
EP0669633B1 (en) Protective switching device
EP0580464B1 (en) Locking device for a casing and machine with such device
WO1988008614A1 (en) Protective switching device with simplified tripping mechanism
EP3249673B1 (en) Mechanism for signalling an electrical fault in an electric protection device, and electric protection device including such a mechanism
FR2503930A1 (en) MINIMUM VOLTAGE TRIGGER FOR POWER CIRCUIT BREAKERS
EP0461027B1 (en) Differential release device
FR2959594A1 (en) Remote control device for use with cutting device to control remote-controlled circuit breaker, has braking units acting on shaft to break lever when lever is moved toward closing position of mobile and fixed contacts
FR2940515A1 (en) Remote control device for controlling remote-controlled circuit breaker in electrical installation, has driving unit whose mechanism comprises elements displaced in translation along driving axis and displaced in rotation around axis
EP0897188B1 (en) Control device for electrical protection apparatus sush as a circuit breaker including a device for indicating the tripping, and a circuit breaker equipped with such a device
EP0393566B1 (en) Circuit breaker
EP3309813A1 (en) Differential electric switching device comprising a differential function test device
EP2642502B1 (en) Trip unit for an electric protection apparatus and electric protection apparatus comprising one such unit
EP3657522B1 (en) Mechanism for controlling the opening and closing of a current interruption device for an electrical switch
FR2940517A1 (en) Remote control device for remote-controlled circuit breaker, has detection units to detect position of remote control shaft rotationally mounted around remote control axis, where shaft actuates electrical contacts of interruption device
EP0218497B1 (en) Protective circuit breaker with a resilient link
FR2940506A1 (en) Electromechanical actuator for remote control device of remote-controlled circuit breaker, has damping unit having elastic unit cooperating with detachable portion for relative displacement of detachable portion with respect to yoke
FR2770614A1 (en) Fireproof shutter closure control mechanism for ventilation ducts

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES GB IT LI NL SE

17P Request for examination filed

Effective date: 19970313

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHNEIDER ELECTRIC INDUSTRIES SA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SCHNEIDER ELECTRIC INDUSTRIES SA

17Q First examination report despatched

Effective date: 20000922

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES GB IT LI NL SE

REF Corresponds to:

Ref document number: 219282

Country of ref document: AT

Date of ref document: 20020615

Kind code of ref document: T

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 69621695

Country of ref document: DE

Date of ref document: 20020718

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020806

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: SCHNEIDER ELECTRIC INDUSTRIES SAS

NLT1 Nl: modifications of names registered in virtue of documents presented to the patent office pursuant to art. 16 a, paragraph 1

Owner name: SCHNEIDER ELECTRIC INDUSTRIES SAS

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: SCHNEIDER ELECTRIC INDUSTRIES SAS

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2176422

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030319

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030319

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030320

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030331

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20030331

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030313

BERE Be: lapsed

Owner name: S.A. *SCHNEIDER ELECTRIC INDUSTRIES

Effective date: 20030331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031001

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031001

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20030319

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20031001

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20030320

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050319