EP2367190B1 - Locking device designed to prevent the earthing of an electrical protection device, and the electrical protection device including said device - Google Patents

Locking device designed to prevent the earthing of an electrical protection device, and the electrical protection device including said device Download PDF

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Publication number
EP2367190B1
EP2367190B1 EP10354084.5A EP10354084A EP2367190B1 EP 2367190 B1 EP2367190 B1 EP 2367190B1 EP 10354084 A EP10354084 A EP 10354084A EP 2367190 B1 EP2367190 B1 EP 2367190B1
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EP
European Patent Office
Prior art keywords
latch
coil
voltage
locking
locking device
Prior art date
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Application number
EP10354084.5A
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German (de)
French (fr)
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EP2367190A1 (en
Inventor
Serge Terpend
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP2367190A1 publication Critical patent/EP2367190A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • 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

Definitions

  • the present invention relates to a locking device for preventing the earthing of an electrical protection device mounted in a chassis in the presence of a voltage on the line on which the apparatus is placed by means of locking adapted to be actuated by actuating means controlled by the presence of a voltage on the line.
  • Locking devices are known to prevent grounding of an electrical apparatus in the presence of a voltage on the power line.
  • EP 1049123 discloses such a device according to the preamble of claim 1. However, these devices prevent grounding also when a power failure occurs or when a fault occurs in electronic systems, voltage sensors, etc. ..while there is no voltage on the start cables.
  • the present invention solves this problem and proposes a locking device according to claim 1, allowing the realization of this grounding of the device in cases of malfunction such as those mentioned above that allow this grounding, after verification of the absence of a voltage on the line, this device being of simple design, reduced size and achievable by means of a reduced number of parts.
  • the subject of the present invention is a locking device of the kind mentioned above, this device also comprises a lock that can be actuated by an operator so as to activate the locking means, or else deactivate them after the activation. actuating means having driven the locking means into a locked position.
  • the aforementioned locking means comprise a latch cooperating with means for preventing the actuation of the grounding device.
  • these means for preventing the actuation of the grounding device comprise a flap mounted rotatably relative to the frame of the apparatus and able to close off or release the access orifice to an operating tool of the grounding device, said flap being biased back to the position of release of the orifice by return means.
  • the aforementioned actuation means comprise an electromagnetic coil, said coil comprising a core cooperating with the lock.
  • the core of the coil is movable between a retracted position inside the coil allowing the displacement of the lock towards the unlocking position, and a position of extraction of the core outside the coil in which the core cooperates with the lock so as to maintain said latch in the locking position.
  • the lock is articulated with respect to the frame of the apparatus, the core of the coil cooperating with an opening provided in the lock so as to prevent the rotation of the lock and thus maintain it in the position of locking, in the case of a presence of voltage on the line, and to allow the rotation of the latch causing the lock in an unlocked position, in the case where no presence of voltage is detected on the line.
  • the electromagnetic coil is a so-called low voltage coil cooperating with an electronic device able not to send voltage to the coil in the case where a voltage is detected on the line, and to send a voltage on the coil in the event that no voltage on the line is detected.
  • the lock comprises a bolt mounted articulated relative to the frame of the apparatus and adapted to be rotated by the operator, and the latch is hinged relative to the bolt.
  • the lock is mechanically connected to the core of the coil by a so-called sliding pivot connection allowing the lock to be locked or unlocked, either by the coil or by the lock.
  • the lock has an oblong opening cooperating with the core of the coil.
  • the aforementioned lock has a substantially square shape and comprises a first arm connected in an articulated manner, by its free end, said bolt, and a second arm cooperating with its free end with the aforementioned means to prevent actuation of the earthing device.
  • the locking device comprises means for returning the lock to the locking position when a voltage is returned to the line after unlocking.
  • the lock has on its surface facing the core of the coil, a surface portion having a slope relative to the aforementioned surface, so as to allow the core of the coil to replace the lock in the position of lock after unlocking, when a voltage returns to the line.
  • the present invention further relates to an electrical protection apparatus having the aforementioned features taken alone or in combination.
  • a locking device for preventing the grounding of an electrical protection device such as a circuit breaker or a medium voltage switch in the presence of a voltage on the line. on which the device is placed.
  • This device comprises a monitoring device (not shown) the presence of a voltage on the electrical line on which the device is placed, and an electromagnetic coil 1 having a core 2 adapted to be moved during the presence of a voltage so as to allow a flap 5 to close off an opening 4 for introducing an operating tool (not shown) of a device M grounding.
  • the core 2 can be moved between a retracted position inside the coil 1 in which position a latch 3 is free to move to the unlocking position, and an extraction position of the core 2 outside the coil 1 in which the core 2 prevents the movement of the lock 3 to this unlocked position and thus maintains it in the locked position preventing the operation of the grounding device M.
  • this coil 1 is a so-called undervoltage coil, the core 2 being driven outside the coil 1 when no voltage is sent on the coil 1.
  • An intermediate electronic device (Not shown) is therefore provided between the voltage monitoring device on the line and the coil 1, said device being intended to send a voltage on the coil 1 when no voltage is detected on the line and vice versa to n send no voltage to the coil 1 when a voltage is detected on the line.
  • This device also comprises a shutter 5 rotatably mounted relative to the frame C of the apparatus and adapted to be rotated in the direction of clockwise by the aforementioned lock 3 so as to close said orifice 4 of access to the operating tool M grounding device, said flap 5 being biased into a position in which said orifice is released via return means (not shown).
  • This latch 3 is formed by a square-shaped piece having two arms 6, 7 one of which is hingedly connected by its free end 6a about an axis X, to the bolt 8 of a key lock 9 constituting a part of an unlocking device whose function will be described later, and the other arm 7 has an end 7a adapted to cooperate with said flap 5.
  • This bolt 8 is adapted to be rotated by a key operation by an operator, between a first position said inactive (shown on the Figures 1 to 8 ) in which only the displacement of the core of the coil may cause the grounding device to be locked or unlocked, and a second so-called active position shown on the Figures 9 to 12 , the transition from the inactive position to the active position causing the unlocking of the lock allowing the introduction of the actuating tool of the grounding device.
  • This lock 3 comprises an oblong opening 10 extending parallel to that 6 of the arms of the lock 3 which is hingedly connected to the bolt 8 of the lock, said opening 10 being intended to receive the core 2 and to cooperate with that in the way that will be explained in what follows.
  • the latch 3 comprises on its face 11 cooperating with the core 2, a portion of face 12 having a slope with respect to said face 11 of the latch 3, this surface portion being intended to cooperate with the core 2 so as to recall the lock in its locked position when a voltage is again detected on the line after unlocking.
  • the oblong aperture 10 and the sloped surface portion 12 are bordered by a protruding flange 13 defining an area 14 in which the end of the core 2 is intended to move, the flange 13 for guiding said core. 2 inside this area.
  • the device On the Figures 1 to 4 , the device is in the locked position following the detection of a voltage on the line by the monitoring system. In this position, the core 2 of the coil 1 is in the extracted position of the coil and is introduced into the opening 10 of the lock 3 thereby preventing rotation of the lock 3 relative to the bolt 8 of the lock. In this position, the latch holds the flap 5 in the closed position of the opening 4 for introducing the operating tool.
  • the core 2 of the coil 1 leaves the opening 10 of the lock and is retracted inside the coil so as to allow the rotation of the lock relative to the counterclockwise bolt, said latch being driven by the flap 5, under the effect of the aforementioned biasing means causing the flap in rotation in a position in which the orifice 4 is released.
  • the shutter 5 is thus driven, in the opposite direction of clockwise so as to release the orifice and allow the introduction of the control crank of the grounding device. This position is illustrated on the Figures 5 to 8 .
  • the device according to the invention also comprises a device for deactivating the locking if necessary by means of a key lock 9.
  • the coil 1 being lack of voltage, the lock will be effective as soon as the coil will be more fueled. It is therefore necessary to be able to deactivate its effect in the event of system failure (faulty coil, power failure, electronics fault, etc ...) resulting in a lack of power to the coil, and after having controlled the absence of tension on the cables.
  • the lock 9 can be actuated.
  • the key is inserted in the barrel and rotated 90 ° in a clockwise direction, driving the bolt also in the same rotation and the lock in rotation in the opposite direction around the core 2 of the coil 1 and the axis of articulation of the lock 3 on the bolt 8, this rotation being authorized by the fact that the core 2 also moves in translation inside the oblong opening 10 of the bolt 3.
  • This rotation of the latch 3 allows the rotation of the flap 5 in the same direction under the effect of the abovementioned return means, said flap being released from the pressure of the latch, this causing the release of the insertion orifice of the tool maneuvering.
  • This unlocked position by the lock is illustrated on the Figures 9 to 12 .
  • a locking device that can be unlocked by an operator under certain conditions that causes the device to be brought into the locking position, and this after verifying the absence of tension on the line, this device being reduced size, using a reduced number of parts and having a reduced cost.
  • this locking function unlockable by means of a lock can be achieved by means of only three parts namely a lock, a lock bolt and a hinge axis of the lock on the bolt, the lock being mounted in pivot on the lock bolt and pivot sliding on the coil core.
  • This kinematics allows the lock to be locked or unlocked either by the coil or by the lock.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Description

La présente invention concerne un dispositif de verrouillage destiné à empêcher la mise à la terre d'un appareil de protection électrique monté dans un châssis en présence d'une tension sur la ligne sur laquelle est placé l'appareil par l'intermédiaire de moyens de verrouillage aptes à être actionnés par des moyens d'actionnement commandés par la présence d'une tension sur la ligne.The present invention relates to a locking device for preventing the earthing of an electrical protection device mounted in a chassis in the presence of a voltage on the line on which the apparatus is placed by means of locking adapted to be actuated by actuating means controlled by the presence of a voltage on the line.

On connaît des dispositifs de verrouillage destinés à empêcher la mise à la terre d'un appareil électrique en présence d'une tension sur la ligne électrique. EP 1049123 divulgue un tel dispositif selon la préambule de la revendication 1. Or, ces dispositifs empêchent la mise à la terre également lorsqu'une coupure de l'alimentation se produit ou lorsqu'un défaut survient dans les systèmes électroniques, capteurs de tension, etc...alors qu'il n'y a pas de tension sur les câbles de départ.Locking devices are known to prevent grounding of an electrical apparatus in the presence of a voltage on the power line. EP 1049123 discloses such a device according to the preamble of claim 1. However, these devices prevent grounding also when a power failure occurs or when a fault occurs in electronic systems, voltage sensors, etc. ..while there is no voltage on the start cables.

La présente invention résout ce problème et propose un dispositif de verrouillage selon la revendication 1, permettant la réalisation de cette mise à la terre de l'appareil dans des cas de disfonctionnement tels ceux énoncés précédemment qui autorisent cette mise à la terre, après vérification de l'absence d'une tension sur la ligne, ce dispositif étant de conception simple, d'encombrement réduit et réalisable au moyen d'un nombre réduit de pièces.The present invention solves this problem and proposes a locking device according to claim 1, allowing the realization of this grounding of the device in cases of malfunction such as those mentioned above that allow this grounding, after verification of the absence of a voltage on the line, this device being of simple design, reduced size and achievable by means of a reduced number of parts.

A cet effet, la présente invention a pour objet un dispositif de verrouillage du genre précédemment mentionné, ce dispositif comporte en outre une serrure apte à être actionnée par un opérateur de manière à activer les moyens de verrouillage, ou bien les désactiver après l'activation des moyens d'actionnement ayant entraîné les moyens de verrouillage dans une position verrouillée.For this purpose, the subject of the present invention is a locking device of the kind mentioned above, this device also comprises a lock that can be actuated by an operator so as to activate the locking means, or else deactivate them after the activation. actuating means having driven the locking means into a locked position.

Selon une caractéristique particulière, les moyens de verrouillage précités comportent un verrou coopérant avec des moyens pour empêcher l'actionnement du dispositif de mise à la terre.According to a particular characteristic, the aforementioned locking means comprise a latch cooperating with means for preventing the actuation of the grounding device.

Selon une autre caractéristique, ces moyens pour empêcher l'actionnement du dispositif de mise à la terre comportent un volet monté rotatif par rapport au châssis de l'appareil et apte à obturer ou libérer l'orifice d'accès à un outil de manoeuvre du dispositif de mise à la terre, ledit volet étant rappelé en position de libération de l'orifice par des moyens de rappel.According to another characteristic, these means for preventing the actuation of the grounding device comprise a flap mounted rotatably relative to the frame of the apparatus and able to close off or release the access orifice to an operating tool of the grounding device, said flap being biased back to the position of release of the orifice by return means.

Selon une autre caractéristique, les moyens d'actionnement précités comportent une bobine électromagnétique, ladite bobine comportant un noyau coopérant avec le verrou.According to another characteristic, the aforementioned actuation means comprise an electromagnetic coil, said coil comprising a core cooperating with the lock.

Selon une autre caractéristique, le noyau de la bobine est mobile entre une position escamotée à l'intérieur de la bobine autorisant le déplacement du verrou vers la position de déverrouillage, et une position d'extraction du noyau à l'extérieur de la bobine dans laquelle le noyau coopère avec le verrou de manière à maintenir ledit verrou dans la position de verrouillage.According to another characteristic, the core of the coil is movable between a retracted position inside the coil allowing the displacement of the lock towards the unlocking position, and a position of extraction of the core outside the coil in which the core cooperates with the lock so as to maintain said latch in the locking position.

Selon une autre caractéristique, le verrou est monté articulé par rapport au châssis de l'appareil, le noyau de la bobine coopérant avec une ouverture prévue dans le verrou de manière à empêcher la rotation du verrou et maintenir ainsi celui-ci dans la position de verrouillage, dans le cas d'une présence de tension sur la ligne, et à autoriser la rotation du verrou entraînant le verrou dans une position de déverrouillage, dans le cas où aucune présence de tension n'est détectée sur la ligne.According to another characteristic, the lock is articulated with respect to the frame of the apparatus, the core of the coil cooperating with an opening provided in the lock so as to prevent the rotation of the lock and thus maintain it in the position of locking, in the case of a presence of voltage on the line, and to allow the rotation of the latch causing the lock in an unlocked position, in the case where no presence of voltage is detected on the line.

Selon une autre caractéristique, la bobine électromagnétique est une bobine dite à manque de tension coopérant avec un dispositif électronique apte à ne pas envoyer de tension sur la bobine dans le cas où une tension est détectée sur la ligne, et à envoyer une tension sur la bobine dans le cas où aucune tension sur la ligne n'est détectée.According to another characteristic, the electromagnetic coil is a so-called low voltage coil cooperating with an electronic device able not to send voltage to the coil in the case where a voltage is detected on the line, and to send a voltage on the coil in the event that no voltage on the line is detected.

Selon une autre caractéristique, la serrure comporte un pêne monté articulé par rapport au châssis de l'appareil et apte à être entraîné en rotation par l'opérateur, et le verrou est monté articulé par rapport à ce pêne.According to another characteristic, the lock comprises a bolt mounted articulated relative to the frame of the apparatus and adapted to be rotated by the operator, and the latch is hinged relative to the bolt.

Selon une autre caractéristique, le verrou est relié mécaniquement au noyau de la bobine par une liaison dite à pivot glissant permettant au verrou d'être bloqué ou bien débloqué, soit par la bobine, soit par la serrure.According to another characteristic, the lock is mechanically connected to the core of the coil by a so-called sliding pivot connection allowing the lock to be locked or unlocked, either by the coil or by the lock.

Selon une autre caractéristique, le verrou comporte une ouverture oblongue coopérant avec le noyau de la bobine.According to another feature, the lock has an oblong opening cooperating with the core of the coil.

Selon une autre caractéristique, le verrou précité présente une forme sensiblement en équerre et comporte un premier bras relié de manière articulée, par son extrémité libre, audit pêne, et un second bras coopérant par son extrémité libre avec les moyens précités pour empêcher l'actionnement du dispositif de mise à la terre.According to another feature, the aforementioned lock has a substantially square shape and comprises a first arm connected in an articulated manner, by its free end, said bolt, and a second arm cooperating with its free end with the aforementioned means to prevent actuation of the earthing device.

Selon une autre caractéristique, le dispositif de verrouillage comporte des moyens pour rappeler le verrou en position de verrouillage lors du retour d'une tension sur la ligne après un déverrouillage.According to another characteristic, the locking device comprises means for returning the lock to the locking position when a voltage is returned to the line after unlocking.

Selon une autre caractéristique, le verrou comporte sur sa surface située en regard du noyau de la bobine, une portion de surface présentant une pente par rapport à la surface précitée, de manière à permettre au noyau de la bobine de replacer le verrou en position de verrouillage après un déverrouillage, lors du retour d'une tension sur la ligne.According to another feature, the lock has on its surface facing the core of the coil, a surface portion having a slope relative to the aforementioned surface, so as to allow the core of the coil to replace the lock in the position of lock after unlocking, when a voltage returns to the line.

La présente invention a encore pour objet un appareil de protection électrique comportant les caractéristiques précédemment mentionnées prises seules ou en combinaison.The present invention further relates to an electrical protection apparatus having the aforementioned features taken alone or in combination.

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 représentation schématique d'un dispositif de verrouillage selon l'invention en position verrouillée,
  • La figure 2 est une vue en perspective, illustrant un dispositif de verrouillage selon une réalisation particulière de l'invention, en position verrouillée,
  • La figure 3 est une vue de face, illustrant le dispositif de verrouillage en place dans un appareil électrique de coupure, en position de verrouillage.
  • La figure 4 est une vue en perspective illustrant uniquement une partie de ce dispositif de verrouillage,
  • Les figures 5,6,7 et 8 sont des vues similaires respectivement aux figures 1,2,3 et 4, le dispositif de verrouillage étant cette fois dans une position déverrouillée par la bobine,
  • La figure 8a est une vue en perspective d'une partie du dispositif de la figure 7, cette partie étant vue de l'arrière, et
  • Les figures 9,10,11 et 12 sont des vues similaires aux figures 1,2,3 et 4, illustrant le dispositif de verrouillage dans une position déverrouillée par la serrure.
But other advantages and features of the invention will become more apparent in the detailed description which follows and refers to the accompanying drawings given solely by way of example and in which:
  • The figure 1 is a schematic representation of a locking device according to the invention in locked position,
  • The figure 2 is a perspective view, illustrating a locking device according to a particular embodiment of the invention, in the locked position,
  • The figure 3 is a front view, illustrating the locking device in place in an electrical switchgear, in the locking position.
  • The figure 4 is a perspective view illustrating only a part of this locking device,
  • The Figures 5,6,7 and 8 are similar views respectively to Figures 1,2,3 and 4 , the locking device being this time in an unlocked position by the coil,
  • The figure 8a is a perspective view of a part of the device of the figure 7 , this part being seen from behind, and
  • The Figures 9,10,11 and 12 are similar views to Figures 1,2,3 and 4 , illustrating the locking device in an unlocked position by the lock.

Sur les figures, on voit un dispositif de verrouillage selon une réalisation particulière de l'invention destiné à empêcher la mise à la terre d'un appareil de protection électrique tel un disjoncteur ou un interrupteur moyenne tension en présence d'une tension sur la ligne sur laquelle est placée l'appareil.
Ce dispositif comporte un dispositif de surveillance (non représenté) de la présence d'une tension sur la ligne électrique sur laquelle l'appareil est placé, ainsi qu'une bobine électromagnétique 1 comportant un noyau 2 apte à être déplacé lors de la présence d'une tension de manière à permettre à un volet 5 de venir obturer un orifice 4 d'introduction d'un outil de manoeuvre (non représenté) d'un dispositif M de mise à la terre. Le noyau 2 peut être déplacé entre une position rétractée à l'intérieur de la bobine 1 dans laquelle position un verrou 3 est libre de se déplacer vers la position de déverrouillage, et une position d'extraction du noyau 2 à l'extérieur de la bobine 1 dans laquelle le noyau 2 empêche le déplacement du verrou 3 vers cette position déverrouillée et maintient donc celui-ci dans la position verrouillée empêchant la manoeuvre du dispositif de mise à la terre M.
Selon la réalisation illustrée sur les figures, cette bobine 1 est une bobine dite à manque de tension, le noyau 2 étant entraîné à l'extérieur de la bobine 1 lorsqu'aucune tension n'est envoyée sur la bobine 1. Un dispositif électronique intermédiaire (non représenté) est donc prévu entre le dispositif de surveillance de la tension sur la ligne et la bobine 1, ledit dispositif étant destiné à envoyer une tension sur la bobine 1 lorsqu'aucune tension n'est détectée sur la ligne et inversement à n'envoyer aucune tension sur la bobine 1 lorsqu'une tension est détectée sur la ligne.
Ce dispositif comporte également un volet d'obturation 5 monté rotatif par rapport au châssis C de l'appareil et apte à être entraîné en rotation dans le sens des aiguilles d'une montre par le verrou précité 3 de manière à obturer ledit orifice 4 d'accès à l'outil de manoeuvre du dispositif M de mise à la terre, ledit volet 5 étant rappelé dans une position dans laquelle ledit orifice est libéré par l'intermédiaire de moyens de rappel (non représentés).
Ce verrou 3 est formé par une pièce en forme d'équerre comportant deux bras 6,7 dont l'un 6 est relié de manière articulée par son extrémité libre 6a autour d'un axe X, au pêne 8 d'une serrure à clé 9 constituant une partie d'un dispositif de déverrouillage dont la fonction sera décrite ultérieurement, et dont l'autre bras 7 comporte une extrémité 7a apte à coopérer avec ledit volet 5. Ce pêne 8 est apte à être déplacé en rotation par une manoeuvre de la clé par un opérateur, entre une première position dite inactive (représentée sur les figures 1 à 8) dans laquelle seul le déplacement du noyau de la bobine peut entraîner le verrouillage ou le déverrouillage du dispositif de mise à la terre, et une seconde position dite active représentée sur les figures 9 à 12, le passage de la position inactive à la position active entraînant le déverrouillage du verrou permettant l'introduction de l'outil d'actionnement du dispositif de mise à la terre.
Ce verrou 3 comporte une ouverture de forme oblongue 10 s'étendant parallèlement à celui 6 des bras du verrou 3 qui est relié de manière articulée au pêne 8 de la serrure, ladite ouverture 10 étant destinée à recevoir le noyau 2 et à coopérer avec celui-ci de la manière qui sera expliquée dans ce qui suit.
Tel qu'illustré sur la figure 8a, le verrou 3 comporte sur sa face 11 coopérant avec le noyau 2, une portion de face 12 présentant une pente par rapport à ladite face 11 du verrou 3, cette portion de surface étant destinée à coopérer avec le noyau 2 de manière à rappeler le verrou dans sa position de verrouillage lorsqu'une tension est de nouveau détectée sur la ligne après un déverrouillage. L'ouverture de forme oblongue 10 ainsi que la portion de surface en pente 12 sont bordées par un rebord en saillie 13 délimitant une zone 14 dans laquelle l'extrémité du noyau 2 est destinée à se déplacer, le rebord 13 permettant le guidage dudit noyau 2 à l'intérieur de cette zone.In the figures, there is shown a locking device according to a particular embodiment of the invention for preventing the grounding of an electrical protection device such as a circuit breaker or a medium voltage switch in the presence of a voltage on the line. on which the device is placed.
This device comprises a monitoring device (not shown) the presence of a voltage on the electrical line on which the device is placed, and an electromagnetic coil 1 having a core 2 adapted to be moved during the presence of a voltage so as to allow a flap 5 to close off an opening 4 for introducing an operating tool (not shown) of a device M grounding. The core 2 can be moved between a retracted position inside the coil 1 in which position a latch 3 is free to move to the unlocking position, and an extraction position of the core 2 outside the coil 1 in which the core 2 prevents the movement of the lock 3 to this unlocked position and thus maintains it in the locked position preventing the operation of the grounding device M.
According to the embodiment illustrated in the figures, this coil 1 is a so-called undervoltage coil, the core 2 being driven outside the coil 1 when no voltage is sent on the coil 1. An intermediate electronic device (Not shown) is therefore provided between the voltage monitoring device on the line and the coil 1, said device being intended to send a voltage on the coil 1 when no voltage is detected on the line and vice versa to n send no voltage to the coil 1 when a voltage is detected on the line.
This device also comprises a shutter 5 rotatably mounted relative to the frame C of the apparatus and adapted to be rotated in the direction of clockwise by the aforementioned lock 3 so as to close said orifice 4 of access to the operating tool M grounding device, said flap 5 being biased into a position in which said orifice is released via return means (not shown).
This latch 3 is formed by a square-shaped piece having two arms 6, 7 one of which is hingedly connected by its free end 6a about an axis X, to the bolt 8 of a key lock 9 constituting a part of an unlocking device whose function will be described later, and the other arm 7 has an end 7a adapted to cooperate with said flap 5. This bolt 8 is adapted to be rotated by a key operation by an operator, between a first position said inactive (shown on the Figures 1 to 8 ) in which only the displacement of the core of the coil may cause the grounding device to be locked or unlocked, and a second so-called active position shown on the Figures 9 to 12 , the transition from the inactive position to the active position causing the unlocking of the lock allowing the introduction of the actuating tool of the grounding device.
This lock 3 comprises an oblong opening 10 extending parallel to that 6 of the arms of the lock 3 which is hingedly connected to the bolt 8 of the lock, said opening 10 being intended to receive the core 2 and to cooperate with that in the way that will be explained in what follows.
As illustrated on the figure 8a , the latch 3 comprises on its face 11 cooperating with the core 2, a portion of face 12 having a slope with respect to said face 11 of the latch 3, this surface portion being intended to cooperate with the core 2 so as to recall the lock in its locked position when a voltage is again detected on the line after unlocking. The oblong aperture 10 and the sloped surface portion 12 are bordered by a protruding flange 13 defining an area 14 in which the end of the core 2 is intended to move, the flange 13 for guiding said core. 2 inside this area.

Le fonctionnement du dispositif selon l'invention va être décrit en détail dans ce qui suit en référence aux figures:
Sur les figures 1 à 4, le dispositif est en position verrouillée suite à la détection d'une tension sur la ligne par le système de surveillance. Dans cette position, le noyau 2 de la bobine 1 est en position extraite de la bobine et est introduit dans l'ouverture 10 du verrou 3 empêchant de ce fait la rotation du verrou 3 par rapport au pêne 8 de la serrure. Dans cette position, le verrou maintient le volet 5 en position d'obturation de l'orifice 4 d'introduction de l'outil de manoeuvre.
Lorsque le dispositif de surveillance ne détecte plus de tension sur la ligne, le noyau 2 de la bobine 1 sort de l'ouverture 10 du verrou et est escamoté à l'intérieur de la bobine de manière à permettre la rotation du verrou par rapport au pêne dans le sens inverse des aiguilles d'une montre, ledit verrou étant entraîné par le volet 5, sous l'effet des moyens de rappel précités entraînant le volet en rotation dans une position dans laquelle l'orifice 4 est libéré. Le volet d'obturation 5 est ainsi entraîné, dans le sens inverse des aiguilles d'une montre de manière à libérer l'orifice et permettre l'introduction de la manivelle de commande du dispositif de mise à la terre. Cette position est illustrée sur les figures 5 à 8.The operation of the device according to the invention will be described in detail in the following with reference to the figures:
On the Figures 1 to 4 , the device is in the locked position following the detection of a voltage on the line by the monitoring system. In this position, the core 2 of the coil 1 is in the extracted position of the coil and is introduced into the opening 10 of the lock 3 thereby preventing rotation of the lock 3 relative to the bolt 8 of the lock. In this position, the latch holds the flap 5 in the closed position of the opening 4 for introducing the operating tool.
When the monitoring device no longer detects voltage on the line, the core 2 of the coil 1 leaves the opening 10 of the lock and is retracted inside the coil so as to allow the rotation of the lock relative to the counterclockwise bolt, said latch being driven by the flap 5, under the effect of the aforementioned biasing means causing the flap in rotation in a position in which the orifice 4 is released. The shutter 5 is thus driven, in the opposite direction of clockwise so as to release the orifice and allow the introduction of the control crank of the grounding device. This position is illustrated on the Figures 5 to 8 .

Le dispositif selon l'invention comporte également un dispositif permettant de désactiver le verrouillage en cas de besoin au moyen d'une serrure à clé 9. En effet, la bobine 1 étant à manque de tension, le verrouillage sera effectif dès que la bobine ne sera plus alimentée. Il est donc nécessaire de pouvoir désactiver son effet en cas de défaillance du système (bobine défectueuse, coupure de l'alimentation, défaut de l'électronique, etc...) entraînant une absence d'alimentation de la bobine, et après avoir contrôlé la non présence de la tension sur les câbles.The device according to the invention also comprises a device for deactivating the locking if necessary by means of a key lock 9. In fact, the coil 1 being lack of voltage, the lock will be effective as soon as the coil will be more fueled. It is therefore necessary to be able to deactivate its effect in the event of system failure (faulty coil, power failure, electronics fault, etc ...) resulting in a lack of power to the coil, and after having controlled the absence of tension on the cables.

Ainsi, après avoir vérifié qu'il n'y a pas de tension sur la ligne, la serrure 9 peut être actionnée. Pour se faire, la clef est insérée dans le barillet et tournée de 90° dans le sens des aiguilles d'une montre, entraînant le pêne également dans une même rotation et le verrou en rotation dans le sens inverse autour du noyau 2 de la bobine 1 et de l'axe d'articulation du verrou 3 sur le pêne 8, cette rotation étant autorisée par le fait que le noyau 2 se déplace également en translation à l'intérieur de l'ouverture oblongue 10 du verrou 3.Thus, after verifying that there is no voltage on the line, the lock 9 can be actuated. To do this, the key is inserted in the barrel and rotated 90 ° in a clockwise direction, driving the bolt also in the same rotation and the lock in rotation in the opposite direction around the core 2 of the coil 1 and the axis of articulation of the lock 3 on the bolt 8, this rotation being authorized by the fact that the core 2 also moves in translation inside the oblong opening 10 of the bolt 3.

Cette rotation du verrou 3 permet la rotation du volet 5 dans le même sens sous l'effet des moyens de rappel précités, ledit volet étant libéré de la pression du verrou, ceci entraînant la libération de l'orifice d'introduction de l'outil de manoeuvre. Cette position déverrouillée par la serrure est illustrée sur les figures 9 à 12.This rotation of the latch 3 allows the rotation of the flap 5 in the same direction under the effect of the abovementioned return means, said flap being released from the pressure of the latch, this causing the release of the insertion orifice of the tool maneuvering. This unlocked position by the lock is illustrated on the Figures 9 to 12 .

On a donc réalisé selon l'invention un dispositif de verrouillage pouvant être déverrouillé par un opérateur dans certaines conditions qui entraînent l'amenée en position de verrouillage du dispositif, et ce après vérification de l'absence de tension sur la ligne, ce dispositif étant d'encombrement réduit, utilisant un nombre réduit de pièce et présentant un coût réduit.Thus, according to the invention, a locking device that can be unlocked by an operator under certain conditions that causes the device to be brought into the locking position, and this after verifying the absence of tension on the line, this device being reduced size, using a reduced number of parts and having a reduced cost.

En effet, cette fonction de verrouillage, déverrouillable au moyen d'une serrure peut être réalisée au moyen de seulement trois pièces à savoir un verrou, un pêne de serrure et un axe d'articulation du verrou sur le pêne, le verrou étant monté en pivot sur le pêne de serrure et en pivot glissant sur le noyau de bobine. Cette cinématique permet au verrou d'être bloqué ou débloqué soit par la bobine soit par la serrure.Indeed, this locking function, unlockable by means of a lock can be achieved by means of only three parts namely a lock, a lock bolt and a hinge axis of the lock on the bolt, the lock being mounted in pivot on the lock bolt and pivot sliding on the coil core. This kinematics allows the lock to be locked or unlocked either by the coil or by the lock.

Claims (14)

  1. Locking device intended to prevent the earthing of an electrical protection apparatus mounted in a frame in the presence of a voltage on the line on which the apparatus is placed via locking means,
    characterized in that these locking means are suitable for being actuated by actuation means controlled by the presence of a voltage on the line, and in that it further comprises a lock (9) suitable for being actuated by an operator so as to activate the locking means (3, 5), or else deactivate them after the activation of the actuation means (1) having driven the locking means (3, 5) into a locked position.
  2. Locking device according to Claim 1, characterized in that the abovementioned locking means (3, 5) comprise a latch (3) co-operating with means (5) for preventing the actuation of the earthing device M.
  3. Locking device according to Claim 2, characterized in that these means for preventing the actuation of the earthing device comprise a shutter (5) mounted to rotate in relation to the frame C of the apparatus and suitable for blocking or releasing the orifice (4) for access to a tool for manoeuvring the earthing device M, said shutter (5) being returned to the position of release of the orifice (4) by return means.
  4. Locking device according to Claim 2, characterized in that the abovementioned actuation means comprise an electromagnetic coil (1), said coil (1) comprising a core (2) co-operating with the latch (3).
  5. Locking device according to Claim 4, characterized in that the core (2) of the coil (1) is mobile between a position retracted inside the coil (1) allowing the displacement of the latch (3) to the unlocking position and a position of extraction of the core outside the coil (1) in which the core (2) co-operates with the latch (3) so as to hold said latch (3) in the locking position.
  6. Locking device according to Claim 4 or 5, characterized in that the latch (3) is mounted articulated in relation to the frame C of the apparatus, the core (2) of the coil (1) co-operating with a slot (10) provided in the latch (3) so as to prevent the rotation of the latch and thus hold the latter in the locking position, in the case of a presence of voltage on the line, and to allow the rotation of the latch driving the latch into an unlocking position, in the case where no presence of voltage is detected on the line.
  7. Locking device according to any one of Claims 4 to 6, characterized in that the electromagnetic coil (1) is a so-called "under voltage" coil co-operating with an electronic device suitable for not sending voltage to the coil in the case where a voltage is detected on the line, and for sending voltage to the coil in the case where no voltage on the line is detected.
  8. Locking device according to Claim 6 or 7, characterized in that the lock (9) comprises a bolt (8) mounted articulated in relation to the frame C of the apparatus and suitable for being driven in rotation by the operator, and in that the latch (3) is mounted articulated in relation to this bolt (8).
  9. Locking device according to Claim 6 or 8, characterized in that the latch (3) is linked mechanically to the core (2) of the coil (1) by a so-called sliding pivot link making it possible for the latch (3) to be blocked or unblocked, either by the coil (1), or by the lock (9).
  10. Locking device according to Claim 9, characterized in that the latch (3) comprises an oblong slot (10) co-operating with the core (2) of the coil (1).
  11. Locking device according to any one of Claims 8 to 10, characterized in that the abovementioned latch (3) is substantially bracket-shaped and comprises a first arm (6) linked in an articulated manner by its free end (6a), to said bolt (8), and a second arm (7) co-operating by its free end (7a) with the abovementioned means for preventing the actuation of the earthing device M.
  12. Locking device according to any one of the preceding claims, characterized in that it comprises means for returning the latch (3) to the locking position, upon the return of a voltage on the line after an unlocking.
  13. Locking device according to any one of Claims 6 to 12, characterized in that the latch (3) comprises, on its surface (11) situated facing the core (2) of the coil (1), a portion of surface (12) exhibiting a slope relative to the abovementioned surface (11), so as to allow the core (2) of the coil (1) to replace the latch (3) in the locking position after an unlocking, upon the return of a voltage on the line.
  14. Electrical protection apparatus comprising a locking device according to any one of Claims 1 to 13.
EP10354084.5A 2010-03-16 2010-11-29 Locking device designed to prevent the earthing of an electrical protection device, and the electrical protection device including said device Active EP2367190B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1001038A FR2957714B1 (en) 2010-03-16 2010-03-16 LOCKING DEVICE FOR PREVENTING THE GROUNDING OF AN ELECTRICAL PROTECTION DEVICE AND AN ELECTRICAL PROTECTION APPARATUS COMPRISING SUCH A DEVICE

Publications (2)

Publication Number Publication Date
EP2367190A1 EP2367190A1 (en) 2011-09-21
EP2367190B1 true EP2367190B1 (en) 2016-06-22

Family

ID=42830008

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Application Number Title Priority Date Filing Date
EP10354084.5A Active EP2367190B1 (en) 2010-03-16 2010-11-29 Locking device designed to prevent the earthing of an electrical protection device, and the electrical protection device including said device

Country Status (4)

Country Link
EP (1) EP2367190B1 (en)
CN (1) CN102194585B (en)
ES (1) ES2592927T3 (en)
FR (1) FR2957714B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2986899B1 (en) * 2012-02-14 2016-05-06 Schneider Electric Ind Sas DEVICE FOR CONTROLLING THE MECHANISM OF A MEDIUM OR HIGH VOLTAGE ELECTRICAL PROTECTION APPARATUS AND ELECTRICAL PROTECTION APPARATUS HAVING THE SAME
CA2990853A1 (en) 2015-06-30 2017-01-05 Remsafe Pty Ltd A remote isolation system and mobile device for use in the remote isolation system
AU2016204520A1 (en) * 2015-06-30 2017-01-19 Remsafe Pty Ltd An equipment isolation switch assembly
US10162313B2 (en) 2015-06-30 2018-12-25 Remsafe Pty Ltd. Equipment isolation system
FR3113335B1 (en) 2020-08-10 2022-11-04 Schneider Electric Ind Sas Interlocking device intended to prevent the earthing of a protective device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB457128A (en) * 1935-05-22 1936-11-23 Reyrolle A & Co Ltd Improvements in or relating to electric switchgear
FR2792767B1 (en) * 1999-04-26 2001-05-25 Alstom MULTI-POSITION ELECTRICAL CONTROL DEVICE FOR ELECTRICAL EQUIPMENT
US6388213B1 (en) * 2000-03-17 2002-05-14 General Electric Company Locking device for molded case circuit breakers
FR2826501B1 (en) * 2001-06-20 2003-08-15 Alstom DISCONNECTOR CONTROL HAVING AN INTERLOCKING LOGIC IMPLANTED IN A REMOVABLE ROTARY PART

Also Published As

Publication number Publication date
FR2957714B1 (en) 2012-03-02
CN102194585B (en) 2015-04-29
EP2367190A1 (en) 2011-09-21
FR2957714A1 (en) 2011-09-23
ES2592927T3 (en) 2016-12-02
CN102194585A (en) 2011-09-21

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