EP1953788B1 - Device for protecting against voltage surges with a mobile electrode with system for unlocking the disconnection device - Google Patents

Device for protecting against voltage surges with a mobile electrode with system for unlocking the disconnection device Download PDF

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Publication number
EP1953788B1
EP1953788B1 EP08354007A EP08354007A EP1953788B1 EP 1953788 B1 EP1953788 B1 EP 1953788B1 EP 08354007 A EP08354007 A EP 08354007A EP 08354007 A EP08354007 A EP 08354007A EP 1953788 B1 EP1953788 B1 EP 1953788B1
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EP
European Patent Office
Prior art keywords
energy
electrode
voltage surge
limiter
contacts
Prior art date
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Application number
EP08354007A
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German (de)
French (fr)
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EP1953788A1 (en
Inventor
Eric Domejean
Christophe Grumel
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP1953788A1 publication Critical patent/EP1953788A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/10—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/044—Monitoring, detection or measuring systems to establish the end of life of the switching device, can also contain other on-line monitoring systems, e.g. for detecting mechanical failures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • 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
    • H01H9/14—Adaptation for built-in safety spark gaps
    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H01H9/465—Shunt circuit closed by transferring the arc onto an auxiliary electrode

Definitions

  • the invention relates to an overvoltage protection device comprising an overvoltage limiter with non-linear elements variable with the voltage and a disconnection device with electrical contacts electrically arranged in series with the surge protector.
  • the disconnecting device comprises a mechanism for actuating opening of the electrical contacts.
  • the protection device comprises a first and a second connection pad.
  • Overvoltage protection devices include an overvoltage limiter with non-linear elements variable with the voltage and a contact disconnection device actuated by an actuating mechanism.
  • the surge protector and the disconnect device are connected in series.
  • the contact disconnection device can adopt a triggering position and a latching position respectively corresponding to the open state and the closed state of the contacts.
  • a tripping circuit cooperates with the actuating mechanism to cause the displacement of the contacts of the disconnection device to the open state especially in the event of destruction of the surge protector, especially at the end of life of said non-linear elements.
  • the surge limiter including a varistor is connected to a thermal fuse to cause the opening of the circuit when the varistor heats up due to a malfunction.
  • a heating up of the varistor can be generated by a leakage current following one or more lightning strikes.
  • the fusion of the thermal fuse is generally accompanied by the displacement of the contacts of the disconnection device to an open state.
  • the synchronization of the fusion of the thermal fuse with the opening of the contacts by the actuating mechanism is performed by a control kinematic chain comprising several mechanical means such as transmission shafts or billets.
  • the use of this kinematic control system has the disadvantage of complicating the implementation of the protection device.
  • the invention therefore aims to overcome the disadvantages of the state of the art, so as to provide a device for protection against overvoltages of simplified construction.
  • the overvoltage protection device comprises an overvoltage limiter electrically connected to one of the connection pads by at least one fusible link, drive means exerting a displacement force displacing the surge protector in case of melting said at least one fuse link, moving said limiter acting directly on the actuating mechanism and causing the permanent opening of the contacts.
  • the surge protector is electrically connected to the second connection pad by a first fusible link fused in case of overheating of said limiter.
  • the first fuse link is a low temperature weld.
  • the disconnection device comprises a first connection electrode in electrical connection with the first connection pad, a second connection electrode in electrical connection with the second pad and a third pad electrode.
  • mobile arc switch electrically connected to the second connection pad.
  • the actuating mechanism moves the third moving arc switching electrode to cause permanent opening of the electrical contacts when the protective device is traversed by electric currents having an energy greater than a triggering energy threshold.
  • the surge protector is serially connected between the third movable arcing switch electrode and the second connection pad, the surge protector and the said second fusible link being simultaneously disconnected when an electric arc is switched between the first electrode connection and the second connection electrode.
  • the surge protector is electrically connected to the second connection pad by a second fusible link undergoing fusion when traversed by alternating or short-circuit electrical currents having an energy lower than a triggering energy threshold.
  • said triggering energy threshold corresponding to the threshold above which electrical currents of lightning waves of the 10/350 or 8/20 type cause permanent opening of the electrical contacts (4, 6).
  • the third movable arc switching electrode is connected to the first connection electrode by an insulating piece forming a spark gap when the electrical contacts are closed.
  • the third movable arc switching electrode is in contact with the first connection electrode when the electrical contacts are closed.
  • the surge protector comprises a varistor.
  • the surge protector comprises a varistor connected in series with a spark gap.
  • the drive means comprise a spring.
  • a high-energy disconnector is connected in series between the first connection electrode and the first connecting range, said high-energy disconnector being calibrated to disconnect when it is crossed by electric currents having an energy greater than the triggering energy threshold.
  • the high-energy disconnector comprises means for acting on the actuating mechanism to cause the permanent opening of the electrical contacts.
  • the high-energy disconnector comprises electromagnetic triggering means.
  • the high energy disconnector comprises a fuse element.
  • the overvoltage protection device 1 comprises an overvoltage limiter 2 with non-linear elements variable with the voltage and a disconnection device 3 with electrical contacts 4, 6.
  • the surge protector 2 and the disconnection device 3 are electrically series.
  • the surge protector 2 preferably comprises a varistor 21.
  • a spark gap 22 may also be placed in series with the varistor 21.
  • the disconnection device 3 comprises a first connection electrode 40 in electrical connection with a first connection pad 41 and a second connection electrode 50 in electrical connection with a second connection pad 51.
  • connection pads 41, 51 are intended to be connected respectively to a phase and the neutral or vice versa.
  • connection pads 41, 51 are intended to be connected respectively to a phase and earth or vice versa.
  • the surge protector 2 is electrically connected in series with the disconnecting device 3 by at least one fuse link 8, 9.
  • Drive means 10 permanently exert a displacement force Fd on the surge protector 2. If at least one of the fuse links is destroyed, the surge protector 2 then moves under the action of the displacement force Fd.
  • the displacement of said limiter acts directly on an actuating mechanism 7 of the disconnection device 3 to cause permanent opening of the contacts 4, 6.
  • the drive means 10 preferably comprise a spring.
  • This coil-type spring is compressed or stretched to exert the displacement force Fd directly on the varistor 21.
  • the varistor 21 is connected in series with the disconnection device 3 through two connection terminals 22, 24 .
  • a first terminal 22 is connected to the disconnection device 3 by a flexible metal braid 23, and a second terminal 24 is connected to the second connection pad 51 by a rigid pin 25 integrating said at least one fuse link 8.9.
  • the rigid axis 25 maintains the varistor 21 in a first position.
  • the electrical contacts 4, 6 are then in a closed position.
  • the rigid axis 25 releases the displacement of the varistor 21 under the action of the displacement force Fd.
  • the varistor 21 moves to act directly on the actuating mechanism 7. Indeed, as shown on the Figures 6 and 7 the varistor 21 comes into contact with a trigger bar 71 of the actuating mechanism 7 which unlocks to place the contacts 4, 6 in the permanent open position.
  • the contact disconnection device is calibrated firstly to discharge electrical currents of lightning waves of the 10/350 or 8/20 type without the actuating mechanism 7 being actuated, and secondly to actuate the actuating mechanism 7 and cause permanent opening of the contacts 4, 6 for alternating currents or continuous short circuit.
  • the calibration of the known protection devices is carried out so that the actuating mechanism 7 of the disconnection device 3 remains locked in the presence of electric currents of lightning waves type 10/350 or 8/20. It is generally undesirable for the actuating mechanism 7 of the disconnecting device 3 to be unlocked and to cause the contacts 4, 6 to open permanently whenever an electric lightning current passes through it.
  • the triggering energy threshold is directly dependent on the electric currents of 10/350 or 8/20 type lightning waves for which the opening of the contacts 4, 6 of the disconnection device 3 is not performed.
  • said triggering energy threshold corresponds to the threshold beyond which electric currents of lightning waves of the 10/350 or 8/20 type would cause permanent opening of the electrical contacts 4, 6.
  • the actuating mechanism 7 When the protection device is traversed by electric currents having an energy greater than a triggering energy threshold, the actuating mechanism 7 is actuated and moves the third moving arc switching electrode 60 and mechanically causing the permanent opening of the electrical contacts 4, 6.
  • the electric currents responsible for actuating the actuating mechanism 7 are generally alternating currents or continuous short circuit.
  • the protection device is effective and allows the flow of electric currents of lightning waves without their energy being responsible for material damage.
  • the electric currents of 10/350 or 8/20 type lightning waves having an energy lower than the triggering energy threshold do not unlock the actuating mechanism of the disconnection device to cause the opening of the contacts.
  • the contacts can generally open (repel) and close under a lightning strike without the actuating mechanism unlocking. These repulsions (openings) of the contacts during operation of the device of protection, are followed by an automatic re-closing of said contacts.
  • the term "permanent opening" of the contacts means an opening caused by the actuating mechanism. The re-closing of the contacts is possible only by a voluntary external action of a user.
  • the disconnecting device 3 further comprises a third movable arc switching electrode 60 electrically connected to the second connection pad 51.
  • the actuating mechanism 7 moves the third movable arc switching electrode. 60 to cause the permanent opening of the electrical contacts 4, 6 when the protective device 1 is traversed by electric currents having an energy greater than a triggering energy threshold.
  • the third movable arc switch electrode 60 is in contact with the first connection electrode 40 when the electrical contacts 4, 6 are closed.
  • the surge protector 2 is then connected in series between the third movable arc switching electrode 60 and the second connection pad 51. According to the embodiment as presented on the FIG. Figures 10 to 12 , the displacement of said third electrode causes the permanent opening of the contacts 4, 6.
  • the third mobile arc switching electrode 60 passes from a service position to a so-called switching position.
  • the protection device comprises an arc extinguishing chamber 101.
  • the first connection electrode 40 and the second connection electrode 50 are arranged facing the arc extinguishing chamber 101 and define the mouth of said chamber.
  • arc extinction 101 Said chamber arc extinguishing device 101 comprises deionization fins 102 for cooling an electric arc 100 and extinguishing it.
  • the surge protector 2 can be electrically connected to the second connection pad 51 by two fusible links 8, 9.
  • a first fusible link 8 undergoes a melting in the event of overheating of the surge limiter 2, in particular of the varistor 21.
  • the rigid axis connecting the varistor to the second connection pad 51 is soldered to the second terminal 24 of the varistor 21 by a low temperature solder. This solder melts in case of heating of the varistor.
  • a second fusible link 9 acts as a disconnector against alternating or continuous currents of short circuits. Indeed, the second fusible link melts when it is crossed by alternating or continuous short circuit electric currents having an energy lower than the triggering energy threshold.
  • the rigid axis 25 connecting the varistor 21 to the second connection pad 51 then comprises a section calibrated to melt when said axis is traversed by short-circuit electrical currents whose energy is below the tripping threshold.
  • the surge protector 2 and the second fusible link 9 are simultaneously switched off when an electric arc 100 is switched between the first connection electrode 40 and the second connection electrode 50.
  • the third movable arc switching electrode 60 is connected to the first connection electrode 40 by an insulating piece when the electrical contacts 4, 6 are closed.
  • the insulating part forms a spark gap 22 electrically positioned in series with the varistor 21 of the surge protector 2.
  • a high-energy disconnector 11 is connected in series between the first connection electrode 40 and the first connection pad 41. Said high-energy disconnector 11 is calibrated to disconnect when electrical currents having a higher energy flow through it. at the trigger energy threshold.
  • said high energy disconnector is intended to act on the actuating mechanism 7 to cause permanent opening of the electrical contacts 4, 6.
  • the high-energy disconnector 11 is then calibrated to act on the actuating mechanism 7 when it is crossed by electric currents having an energy higher than the triggering energy threshold.
  • Said high-energy disconnector then comprises means for acting on the actuating mechanism 7 to cause permanent opening of the electrical contacts 4, 6.
  • the high-energy disconnector 11 comprises electromagnetic tripping means or a fuse element.
  • the disconnecting device comprises resetting means 72.
  • the resetting means 72 allow the displacement of said third electrode from the so-called switching position to the so-called service position.
  • the resetting means 72 it is possible to mechanically cause the closing of the contacts 4, 6 after permanent opening of said contacts.
  • the rearming means 72 also allow to act on the actuating mechanism 7 to cause the permanent opening of the electrical contacts 4, 6.

Abstract

The device (1) has a disconnection device placed in series with a surge suppressor, where the disconnection device includes electrical contacts (4, 6). The device has an actuating mechanism (7) for actuating opening of the contacts. The suppressor is electrically connected to connection lugs (41, 51) by fusible connections (8, 9). A driving unit (10) e.g. helical spring, exerts displacement force (Fd) for displacing the suppressor in case of fusion of the connections. The displacement of the suppressor acts directly on the actuating mechanism and provokes permanent opening of the contacts.

Description

DOMAINE TECHNIQUE DE L'INVENTIONTECHNICAL FIELD OF THE INVENTION

L'invention est relative à un dispositif de protection contre les surtensions comportant un limiteur de surtension à éléments non linéaires variables avec la tension et un dispositif de déconnexion à contacts électriques disposé électriquement en série avec le limiteur de surtension. Le dispositif de déconnexion comporte un mécanisme d'actionnement d'ouverture des contacts électriques. En outre, le dispositif de protection comprend une première et une deuxième plage de raccordement.The invention relates to an overvoltage protection device comprising an overvoltage limiter with non-linear elements variable with the voltage and a disconnection device with electrical contacts electrically arranged in series with the surge protector. The disconnecting device comprises a mechanism for actuating opening of the electrical contacts. In addition, the protection device comprises a first and a second connection pad.

ETAT DE LA TECHNIQUE ANTERIEURESTATE OF THE PRIOR ART

Il est connu des dispositifs de protection contre les surtensions comportant un limiteur de surtension à éléments non linéaires variables avec la tension et un dispositif de déconnexion à contacts actionnés par un mécanisme d'actionnement. Le limiteur de surtension et le dispositif de déconnexion sont montés en série.Overvoltage protection devices are known that include an overvoltage limiter with non-linear elements variable with the voltage and a contact disconnection device actuated by an actuating mechanism. The surge protector and the disconnect device are connected in series.

Tel que décrit dans le document EP0441722B1 ; le dispositif de déconnexion à contacts peut adopter une position de déclenchement et une position d'enclenchement correspondant respectivement à l'état ouvert et à l'état fermé des contacts. Un circuit de déclenchement coopère avec le mécanisme d'actionnement pour provoquer le déplacement des contacts du dispositif de déconnexion vers l'état ouvert notamment en cas de destruction du limiteur de surtension notamment en fin de vie desdits éléments non linéaires.As described in the document EP0441722B1 ; the contact disconnection device can adopt a triggering position and a latching position respectively corresponding to the open state and the closed state of the contacts. A tripping circuit cooperates with the actuating mechanism to cause the displacement of the contacts of the disconnection device to the open state especially in the event of destruction of the surge protector, especially at the end of life of said non-linear elements.

Comme décrit dans le document EP1607995 , le limiteur de surtension comprenant notamment une varistance est connectée à un fusible thermique pour provoquer l'ouverture du circuit lorsque la varistance chauffe suite à un défaut de fonctionnement. Un échauffement de la varistance peut être généré par un courant de fuite suite à un ou plusieurs chocs de foudre. La fusion du fusible thermique s'accompagne généralement du déplacement des contacts du dispositif de déconnexion vers un état ouvert.As described in the document EP1607995 , the surge limiter including a varistor is connected to a thermal fuse to cause the opening of the circuit when the varistor heats up due to a malfunction. A heating up of the varistor can be generated by a leakage current following one or more lightning strikes. The fusion of the thermal fuse is generally accompanied by the displacement of the contacts of the disconnection device to an open state.

La synchronisation de la fusion du fusible thermique avec l'ouverture des contacts par le mécanisme d'actionnement est réalisée par une chaîne cinématique de commande comprenant plusieurs moyens mécaniques tels que des axes de transmission ou des billettes. L'utilisation de cette chaîne cinématique de commande présente l'inconvénient de complexifier la réalisation du dispositif de protection.The synchronization of the fusion of the thermal fuse with the opening of the contacts by the actuating mechanism is performed by a control kinematic chain comprising several mechanical means such as transmission shafts or billets. The use of this kinematic control system has the disadvantage of complicating the implementation of the protection device.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

L'invention vise donc à remédier aux inconvénients de l'état de la technique, de manière à proposer un dispositif de protection contre les surtensions de construction simplifiée.The invention therefore aims to overcome the disadvantages of the state of the art, so as to provide a device for protection against overvoltages of simplified construction.

Le dispositif de protection contre les surtensions selon l'invention comporte un le limiteur de surtension relié électriquement à une des plages de raccordement par au moins une liaison fusible, des moyens d'entraînement exercent une force de déplacement déplaçant le limiteur de surtension en cas de fusion de ladite au moins une la liaison fusible, le déplacement dudit limiteur agissant directement sur le mécanisme d'actionnement et provoquant l'ouverture permanente des contacts.The overvoltage protection device according to the invention comprises an overvoltage limiter electrically connected to one of the connection pads by at least one fusible link, drive means exerting a displacement force displacing the surge protector in case of melting said at least one fuse link, moving said limiter acting directly on the actuating mechanism and causing the permanent opening of the contacts.

Dans un mode préférentiel de réalisation, le limiteur de surtension est relié électriquement à la deuxième plage de raccordement par une première liaison fusible subissant une fusion en cas de surchauffe dudit limiteur.In a preferred embodiment, the surge protector is electrically connected to the second connection pad by a first fusible link fused in case of overheating of said limiter.

Avantageusement, la première liaison fusible est une soudure basse température.Advantageously, the first fuse link is a low temperature weld.

Dans un mode particulier de réalisation, le dispositif de déconnexion comporte une première électrode de raccordement en liaison électrique avec la première plage de raccordement, une deuxième électrode de raccordement en liaison électrique avec la deuxième plage de raccordement et une troisième électrode de commutation d'arc mobile reliée électriquement à la deuxième plage de raccordement. Le mécanisme d'actionnement déplace la troisième électrode de commutation d'arc mobile pour provoquer l'ouverture permanente des contacts électriques lorsque le dispositif de protection est traversé par des courants électriques ayant une énergie supérieure à un seuil énergétique de déclenchement. Le limiteur de surtension est de branché en série entre la troisième électrode de commutation d'arc mobile et la deuxième plage de raccordement, le limiteur de surtension et ladite seconde liaison fusible étant simultanément hors circuit lorsqu'un arc électrique est commuté entre la première électrode de raccordement et la deuxième électrode de raccordement.In a particular embodiment, the disconnection device comprises a first connection electrode in electrical connection with the first connection pad, a second connection electrode in electrical connection with the second pad and a third pad electrode. mobile arc switch electrically connected to the second connection pad. The actuating mechanism moves the third moving arc switching electrode to cause permanent opening of the electrical contacts when the protective device is traversed by electric currents having an energy greater than a triggering energy threshold. The surge protector is serially connected between the third movable arcing switch electrode and the second connection pad, the surge protector and the said second fusible link being simultaneously disconnected when an electric arc is switched between the first electrode connection and the second connection electrode.

De préférence, le limiteur de surtension est relié électriquement à la deuxième plage de raccordement par une seconde liaison fusible subissant une fusion lorsqu'elle est traversée par des courants électriques alternatifs ou continus de court-circuit ayant une énergie inférieure à un seuil énergétique de déclenchement, ledit seuil énergétique de déclenchement correspondant au seuil au-delà duquel des courants électriques d'ondes de foudre de type 10/350 ou 8/20 provoquent l'ouverture permanente des contacts électriques (4, 6).Preferably, the surge protector is electrically connected to the second connection pad by a second fusible link undergoing fusion when traversed by alternating or short-circuit electrical currents having an energy lower than a triggering energy threshold. said triggering energy threshold corresponding to the threshold above which electrical currents of lightning waves of the 10/350 or 8/20 type cause permanent opening of the electrical contacts (4, 6).

Dans un mode particulier de réalisation, la troisième électrode de commutation d'arc mobile est reliée à la première électrode de raccordement par une pièce isolante formant un éclateur lorsque les contacts électriques sont fermés.In a particular embodiment, the third movable arc switching electrode is connected to the first connection electrode by an insulating piece forming a spark gap when the electrical contacts are closed.

Dans un mode particulier de réalisation, la troisième électrode de commutation d'arc mobile est en contact avec la première électrode de raccordement lorsque les contacts électriques sont fermés.In a particular embodiment, the third movable arc switching electrode is in contact with the first connection electrode when the electrical contacts are closed.

De préférence, le limiteur de surtension comporte une varistance.Preferably, the surge protector comprises a varistor.

De préférence, le limiteur de surtension comporte une varistance reliée en série avec un éclateur.Preferably, the surge protector comprises a varistor connected in series with a spark gap.

Avantageusement, les moyens d'entraînement comportent un ressort.Advantageously, the drive means comprise a spring.

Dans un mode particulier de réalisation, un déconnecteur haut-énergie est branché en série entre la première électrode de raccordement et la première plage de raccordement, ledit déconnecteur haut-énergie étant calibré pour se déconnecter lorsqu'il est traversé par des courants électriques ayant une énergie supérieure au seuil énergétique de déclenchement.In a particular embodiment, a high-energy disconnector is connected in series between the first connection electrode and the first connecting range, said high-energy disconnector being calibrated to disconnect when it is crossed by electric currents having an energy greater than the triggering energy threshold.

De préférence, le déconnecteur haut-énergie comprend de moyens pour agir sur le mécanisme d'actionnement pour provoquer l'ouverture permanente des contacts électriquesPreferably, the high-energy disconnector comprises means for acting on the actuating mechanism to cause the permanent opening of the electrical contacts.

Avantageusement, le déconnecteur haut-énergie comprend de moyens électromagnétiques de déclenchement.Advantageously, the high-energy disconnector comprises electromagnetic triggering means.

Avantageusement, le déconnecteur haut-énergie comprend un élément fusible.Advantageously, the high energy disconnector comprises a fuse element.

BREVE DESCRIPTION DES FIGURESBRIEF DESCRIPTION OF THE FIGURES

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et représentés aux dessins annexés sur lesquels :

  • les figures 1 et 2 représentent des vues éclatées en perspective dispositif de protection selon un mode de réalisation de l'invention ;
  • la figure 3 représente le cheminement du courant électrique à travers le dispositif de protection lorsque ce dernier est en position de service ;
  • la figure 4 représente une vue détaillée en perspective d'une varistance utilisée en tant que limiteur de surtension pour un dispositif de protection selon les figures 1 à 3 ;
  • les figures 5 à 7 représentent un dispositif de protection selon les figures 1 à 3 dans différents états de fonctionnement ;
  • la figures 8 représente une vue détaillée de la varistance selon la figure 5;
  • la figures 9 représente une vue détaillée de la varistance selon la figure 6 ;
  • la figure 10 représente une vue schématique d'une variante de réalisation du dispositif de protection selon les différents modes de réalisation de l'invention ;
  • les figures 11 et 12 représentent des vues schématiques d'un dispositif de protection selon un mode particulier de réalisation de l'invention, respectivement en position de service et en position de commutation ;
  • les figures 13 et 14 représentent des variantes de réalisation du dispositif de protection selon les différents modes de réalisation de l'invention.
Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention, given by way of non-limiting examples, and represented in the accompanying drawings in which:
  • the Figures 1 and 2 are exploded views in perspective protective device according to one embodiment of the invention;
  • the figure 3 represents the path of the electric current through the protection device when the latter is in the service position;
  • the figure 4 represents a detailed perspective view of a varistor used as a surge protector for a protection device according to the Figures 1 to 3 ;
  • the Figures 5 to 7 represent a protective device according to the Figures 1 to 3 in different operating states;
  • the figures 8 represents a detailed view of the varistor according to the figure 5 ;
  • the figures 9 represents a detailed view of the varistor according to the figure 6 ;
  • the figure 10 is a schematic view of an alternative embodiment of the protection device according to different embodiments of the invention;
  • the figures 11 and 12 represent schematic views of a protection device according to a particular embodiment of the invention, respectively in the operating position and in the switching position;
  • the figures 13 and 14 represent alternative embodiments of the protection device according to different embodiments of the invention.

DESCRIPTION DETAILLEE D'UN MODE DE REALISATIONDETAILED DESCRIPTION OF AN EMBODIMENT

Le dispositif de protection 1 contre les surtensions comporte un limiteur de surtension 2 à éléments non linéaires variables avec la tension et un dispositif de déconnexion 3 à contacts électriques 4, 6. Le limiteur de surtension 2 et le dispositif de déconnexion 3 sont disposés électriquement en série.The overvoltage protection device 1 comprises an overvoltage limiter 2 with non-linear elements variable with the voltage and a disconnection device 3 with electrical contacts 4, 6. The surge protector 2 and the disconnection device 3 are electrically series.

Le limiteur de surtension 2 comporte de préférence une varistance 21. Dans certains modes de réalisation de l'invention tels que représentés sur les figures 13 et 14, un éclateur 22 peut aussi être placé en série avec la varistance 21.The surge protector 2 preferably comprises a varistor 21. In some embodiments of the invention as shown in FIG. figures 13 and 14 a spark gap 22 may also be placed in series with the varistor 21.

Le dispositif de déconnexion 3 comporte une première électrode de raccordement 40 en liaison électrique avec une première plage de raccordement 41 et une deuxième électrode de raccordement 50 en liaison électrique avec une deuxième plage de raccordement 51.The disconnection device 3 comprises a first connection electrode 40 in electrical connection with a first connection pad 41 and a second connection electrode 50 in electrical connection with a second connection pad 51.

Si le dispositif de protection 1 est branché entre phase et neutre, les plages de raccordement 41, 51, sont destinées à être raccordées respectivement à une phase et au neutre ou inversement.If the protective device 1 is connected between phase and neutral, the connection pads 41, 51 are intended to be connected respectively to a phase and the neutral or vice versa.

Si le dispositif de protection 1 est branché entre phase et terre, les plages de raccordement 41, 51, sont destinées à être raccordées respectivement à une phase et à la terre ou inversement.If the protection device 1 is connected between phase and ground, the connection pads 41, 51 are intended to be connected respectively to a phase and earth or vice versa.

Selon un mode de réalisation préférentiel de l'invention tel que représenté sur la figure 1 à 9, le limiteur de surtension 2 est relié électriquement en série avec le dispositif de déconnexion 3 par au moins une liaison fusible 8, 9. Des moyens d'entraînement 10 exercent de manière permanente une force de déplacement Fd sur le limiteur de surtension 2. Si au moins une des liaisons fusible est détruite, le limiteur de surtension 2 se déplace alors sous l'action de la force de déplacement Fd. Le déplacement dudit limiteur agit directement sur un mécanisme d'actionnement 7 du dispositif de déconnexion 3 pour provoquer l'ouverture permanente des contacts 4, 6.According to a preferred embodiment of the invention as represented on the figure 1 to 9 , the surge protector 2 is electrically connected in series with the disconnecting device 3 by at least one fuse link 8, 9. Drive means 10 permanently exert a displacement force Fd on the surge protector 2. If at least one of the fuse links is destroyed, the surge protector 2 then moves under the action of the displacement force Fd. The displacement of said limiter acts directly on an actuating mechanism 7 of the disconnection device 3 to cause permanent opening of the contacts 4, 6.

Comme représenté sur les figures 1 et 2, les moyens d'entraînement 10 comportent de préférence un ressort. Ce ressort de type hélicoïdal est compressé ou étiré pour exercer la force de déplacement Fd directement sur la varistance 21. Selon un mode de réalisation, la varistance 21 est reliée en série avec de dispositif de déconnexion 3 à travers deux bornes de connexion 22, 24.As shown on Figures 1 and 2 the drive means 10 preferably comprise a spring. This coil-type spring is compressed or stretched to exert the displacement force Fd directly on the varistor 21. According to one embodiment, the varistor 21 is connected in series with the disconnection device 3 through two connection terminals 22, 24 .

Une première borne 22 est reliée au dispositif de déconnexion 3 par une tresse 23 métallique souple, et une seconde borne 24 est reliée à la deuxième plage de raccordement 51 par un axe rigide 25 intégrant ladite au moins une liaison fusible 8,9.A first terminal 22 is connected to the disconnection device 3 by a flexible metal braid 23, and a second terminal 24 is connected to the second connection pad 51 by a rigid pin 25 integrating said at least one fuse link 8.9.

Comme représenté sur les figures 4 et 9, l'axe rigide 25 maintient la varistance 21 dans une première position. Les contacts électriques 4, 6 sont alors dans une position de fermeture. Lorsqu'au moins une des liaisons fusibles fond, l'axe rigide 25 libère le déplacement de la varistance 21 sous l'action de la force de déplacement Fd. Comme représenté sur la figure 6, la varistance 21 se déplace pour agir directement sur le mécanisme d'actionnement 7. En effet, comme représenté sur les figures 6 et 7, la varistance 21 rentre en contact avec une barre de déclenchement 71 du mécanisme d'actionnement 7 qui se déverrouille pour placer les contacts 4, 6 en position d'ouverture permanente.As shown on figures 4 and 9 the rigid axis 25 maintains the varistor 21 in a first position. The electrical contacts 4, 6 are then in a closed position. When at least one of the fusible links melts, the rigid axis 25 releases the displacement of the varistor 21 under the action of the displacement force Fd. As shown on the figure 6 , the varistor 21 moves to act directly on the actuating mechanism 7. Indeed, as shown on the Figures 6 and 7 the varistor 21 comes into contact with a trigger bar 71 of the actuating mechanism 7 which unlocks to place the contacts 4, 6 in the permanent open position.

Le dispositif de déconnexion à contacts est calibré d'une part pour écouler des courants électriques d'ondes de foudre de type 10/350 ou 8/20 sans que le mécanisme d'actionnement 7 ne soit actionné, et d'autre part pour actionner le mécanisme d'actionnement 7et provoquer l'ouverture permanente des contacts 4, 6 pour des courants alternatifs ou continus de court-circuit.The contact disconnection device is calibrated firstly to discharge electrical currents of lightning waves of the 10/350 or 8/20 type without the actuating mechanism 7 being actuated, and secondly to actuate the actuating mechanism 7 and cause permanent opening of the contacts 4, 6 for alternating currents or continuous short circuit.

En effet, le calibrage des dispositifs de protection connus est réalisé de manière à ce que le mécanisme d'actionnement 7 du dispositif de déconnexion 3 reste verrouiller en présence de courants électriques d'ondes de foudre de type 10/350 ou 8/20. Il n'est généralement pas souhaitable que le mécanisme d'actionnement 7 du dispositif de déconnexion 3 se déverrouille et provoque l'ouverture permanente des contacts 4, 6 à chaque fois qu'il est traversé par un courant électrique d'onde de foudre.Indeed, the calibration of the known protection devices is carried out so that the actuating mechanism 7 of the disconnection device 3 remains locked in the presence of electric currents of lightning waves type 10/350 or 8/20. It is generally undesirable for the actuating mechanism 7 of the disconnecting device 3 to be unlocked and to cause the contacts 4, 6 to open permanently whenever an electric lightning current passes through it.

Le seuil énergétique de déclenchement est directement dépendant des courants électriques d'ondes de foudre de type 10/350 ou 8/20 pour lesquels l'ouverture des contacts 4, 6 du dispositif de déconnexion 3 n'est pas réalisée. Autrement dit, ledit seuil énergétique de déclenchement correspond au seuil au-delà duquel des courants électriques d'ondes de foudre de type 10/350 ou 8/20 provoqueraient l'ouverture permanente des contacts électriques 4, 6.The triggering energy threshold is directly dependent on the electric currents of 10/350 or 8/20 type lightning waves for which the opening of the contacts 4, 6 of the disconnection device 3 is not performed. In other words, said triggering energy threshold corresponds to the threshold beyond which electric currents of lightning waves of the 10/350 or 8/20 type would cause permanent opening of the electrical contacts 4, 6.

Lorsque le dispositif de protection est traversé par des courants électriques ayant une énergie supérieure à un seuil énergétique de déclenchement, le mécanisme d'actionnement 7 est actionné et déplace la troisième électrode de commutation d'arc mobile 60 et provoquer mécaniquement l'ouverture permanente des contacts électriques 4, 6. Les courants électriques responsables de l'actionnement du mécanisme d'actionnement 7 sont généralement des courants alternatifs ou continus de court-circuit.When the protection device is traversed by electric currents having an energy greater than a triggering energy threshold, the actuating mechanism 7 is actuated and moves the third moving arc switching electrode 60 and mechanically causing the permanent opening of the electrical contacts 4, 6. The electric currents responsible for actuating the actuating mechanism 7 are generally alternating currents or continuous short circuit.

Pour des courants électriques d'ondes de foudre de type 10/350 ou 8/20 ayant une énergie inférieure à l'énergie de seuil de déclenchement, le dispositif de protection est efficace et permet l'écoulement des courants électriques d'ondes de foudre sans que leur énergie soit responsable de dommages matériels. En outre, les courants électriques d'ondes de foudre de type 10/350 ou 8/20 ayant une énergie inférieure au seuil énergétique de déclenchement ne déverrouillent pas le mécanisme d'actionnement du dispositif de déconnexion pour provoquer l'ouverture des contacts.For electric currents of 10/350 or 8/20 type lightning waves having an energy lower than the trip threshold energy, the protection device is effective and allows the flow of electric currents of lightning waves without their energy being responsible for material damage. In addition, the electric currents of 10/350 or 8/20 type lightning waves having an energy lower than the triggering energy threshold do not unlock the actuating mechanism of the disconnection device to cause the opening of the contacts.

Les contacts peuvent généralement s'ouvrir (répulser) et se refermer sous un choc de foudre sans que le mécanisme d'actionnement ne se déverrouille. Ces répulsions (ouvertures) des contacts en cours de fonctionnement du dispositif de protection, sont suivies par une re-fermeture automatique desdits contacts. On entend alors par « ouverture permanente » des contacts, une ouverture provoquée par le mécanisme d'actionnement. La re-fermeture des contacts n'est possible que par une action volontaire extérieure d'un utilisateur.The contacts can generally open (repel) and close under a lightning strike without the actuating mechanism unlocking. These repulsions (openings) of the contacts during operation of the device of protection, are followed by an automatic re-closing of said contacts. The term "permanent opening" of the contacts means an opening caused by the actuating mechanism. The re-closing of the contacts is possible only by a voluntary external action of a user.

Selon un second mode préférentiel de réalisation tel que présenté sur les figures 5 à 7, le dispositif de déconnexion 3 comporte en outre une troisième électrode de commutation d'arc mobile 60 reliée électriquement à la deuxième plage de raccordement 51. Selon ce mode réalisation, le mécanisme d'actionnement 7 déplace la troisième électrode de commutation d'arc mobile 60 pour provoquer l'ouverture permanente des contacts électriques 4, 6 lorsque le dispositif de protection 1 est traversé par des courants électriques ayant une énergie supérieure à un seuil énergétique de déclenchement.According to a second preferred embodiment as presented on the Figures 5 to 7 the disconnecting device 3 further comprises a third movable arc switching electrode 60 electrically connected to the second connection pad 51. In this embodiment, the actuating mechanism 7 moves the third movable arc switching electrode. 60 to cause the permanent opening of the electrical contacts 4, 6 when the protective device 1 is traversed by electric currents having an energy greater than a triggering energy threshold.

La troisième électrode de commutation d'arc mobile 60 est en contact avec la première électrode de raccordement 40 lorsque les contacts électriques 4, 6 sont fermés.The third movable arc switch electrode 60 is in contact with the first connection electrode 40 when the electrical contacts 4, 6 are closed.

Le limiteur de surtension 2 est alors de branché en série entre la troisième électrode de commutation d'arc mobile 60 et la deuxième plage de raccordement 51. Selon le mode de réalisation tel que présenté sur les figures 10 à 12, le déplacement de ladite troisième électrode provoque l'ouverture permanente des contacts 4, 6. La troisième électrode de commutation d'arc mobile 60 passe d'une position de service à une position dite de commutation.The surge protector 2 is then connected in series between the third movable arc switching electrode 60 and the second connection pad 51. According to the embodiment as presented on the FIG. Figures 10 to 12 , the displacement of said third electrode causes the permanent opening of the contacts 4, 6. The third mobile arc switching electrode 60 passes from a service position to a so-called switching position.

Lorsque le dispositif de protection est traversé par des courants électriques d'ondes de foudre de type 10/350 ou 8/20, un arc électrique 100 est très rapidement commuté entre la première électrode de raccordement 40 et la deuxième électrode de raccordement 50. Le limiteur de surtension 2 est placé hors circuit et n'est pas traversé par l'onde foudre.When the protection device is traversed by electric currents of lightning waves of the 10/350 or 8/20 type, an electric arc 100 is very quickly switched between the first connection electrode 40 and the second connection electrode 50. surge protector 2 is placed out of circuit and is not crossed by the lightning wave.

Le dispositif de protection comporte une chambre d'extinction d'arc 101. La première électrode de raccordement 40 et la deuxième électrode de raccordement 50 sont disposées en regard de la chambre extinction d'arc 101 et délimitent l'embouchure de ladite chambre d'extinction d'arc 101. Ladite chambre d'extinction d'arc 101 comporte des ailettes de désionisation 102 destinées au refroidissement d'un arc électrique 100 et à son extinction.The protection device comprises an arc extinguishing chamber 101. The first connection electrode 40 and the second connection electrode 50 are arranged facing the arc extinguishing chamber 101 and define the mouth of said chamber. arc extinction 101. Said chamber arc extinguishing device 101 comprises deionization fins 102 for cooling an electric arc 100 and extinguishing it.

Selon un mode de réalisation de l'invention, le limiteur de surtension 2 peut être relié électriquement à la deuxième plage de raccordement 51 par deux liaisons fusibles 8, 9.According to one embodiment of the invention, the surge protector 2 can be electrically connected to the second connection pad 51 by two fusible links 8, 9.

Une première liaison fusible 8 subit une fusion en cas de surchauffe du limiteur de surtension 2, notamment de la varistance 21. Selon le mode de réalisation tel que représenté sur les figures 7 à 9, l'axe rigide reliant la varistance à la deuxième plage de raccordement 51 est soudé à la seconde borne 24 de la varistance 21 par une soudure basse température. Cette soudure fond en cas d'échauffement de la varistance.A first fusible link 8 undergoes a melting in the event of overheating of the surge limiter 2, in particular of the varistor 21. According to the embodiment as represented on the FIG. Figures 7 to 9 the rigid axis connecting the varistor to the second connection pad 51 is soldered to the second terminal 24 of the varistor 21 by a low temperature solder. This solder melts in case of heating of the varistor.

Une seconde liaison fusible 9 joue le rôle du déconnecteur contre les courants alternatifs ou continus de courts-circuits. En effet, la seconde liaison fusible fond lorsqu'elle est traversée par des courants électriques alternatifs ou continus de court-circuit ayant une énergie inférieure au seuil énergétique de déclenchement. Selon le mode de réalisation tel que représenté sur les figures 4 et 9, l'axe rigide 25 reliant la varistance 21 à la deuxième plage de raccordement 51 comporte alors une section calibrée pour fondre lorsque ledit axe est traversé par des courants électriques de court-circuit dont l'énergie est inférieure au seuil de déclenchement.A second fusible link 9 acts as a disconnector against alternating or continuous currents of short circuits. Indeed, the second fusible link melts when it is crossed by alternating or continuous short circuit electric currents having an energy lower than the triggering energy threshold. According to the embodiment as shown in figures 4 and 9 the rigid axis 25 connecting the varistor 21 to the second connection pad 51 then comprises a section calibrated to melt when said axis is traversed by short-circuit electrical currents whose energy is below the tripping threshold.

Selon le second mode préférentiel de réalisation représenté sur la figure 10 à 12, le limiteur de surtension 2 et la seconde liaison fusible 9 sont simultanément placés hors circuit lorsqu'un arc électrique 100 est commuté entre la première électrode de raccordement 40 et la deuxième électrode de raccordement 50.According to the second preferred embodiment shown in the figure 10 to 12 , the surge protector 2 and the second fusible link 9 are simultaneously switched off when an electric arc 100 is switched between the first connection electrode 40 and the second connection electrode 50.

Le fonctionnement des modes de réalisation de l'invention tels que décrits ci-dessus reste inchangé si la varistance 21 est placé dans un chariot ou dans un boîtier mobile, formant un bloc unique avec la varistance 21. La force de déplacement Fd pourrait alors s'appliquer sur le chariot ou sur le boîtier mobile au-lieu de s'appliquer directement sur la varistance. En outre, le chariot ou le boîtier mobile pourrait actionner la barre de déclenchement 71 du mécanisme d'actionnement 7.The operation of the embodiments of the invention as described above remains unchanged if the varistor 21 is placed in a carriage or in a mobile housing, forming a single block with the varistor 21. The displacement force Fd could then be apply on the carriage or mobile housing instead of directly on the varistor. In addition, the carriage or the mobile housing could actuate the trigger bar 71 of the mechanism actuator 7.

Selon une première variante de réalisation des différents modes de réalisation de l'invention, telle que représentée sur la figure 14, la troisième électrode de commutation d'arc mobile 60 est reliée à la première électrode de raccordement 40 par une pièce isolante lorsque les contacts électriques 4, 6 sont fermés. La pièce isolant forme un éclateur 22 positionné électriquement en série avec la varistance 21 du limiteur de surtension 2.According to a first variant embodiment of the various embodiments of the invention, as shown in FIG. figure 14 , the third movable arc switching electrode 60 is connected to the first connection electrode 40 by an insulating piece when the electrical contacts 4, 6 are closed. The insulating part forms a spark gap 22 electrically positioned in series with the varistor 21 of the surge protector 2.

Selon une seconde variante de réalisation des différents modes de réalisation de l'invention, telle que représenté sur la figure 13, un déconnecteur haut-énergie 11 est branché en série entre la première électrode de raccordement 40 et la première plage de raccordement 41. Ledit déconnecteur haut-énergie 11 est calibré pour se déconnecter lorsqu'il est traversé par des courants électriques ayant une énergie supérieure au seuil énergétique de déclenchement.According to a second variant embodiment of the various embodiments of the invention, as shown in FIG. figure 13 a high-energy disconnector 11 is connected in series between the first connection electrode 40 and the first connection pad 41. Said high-energy disconnector 11 is calibrated to disconnect when electrical currents having a higher energy flow through it. at the trigger energy threshold.

De préférence, ledit déconnecteur haut-énergie est destiné à agir sur le mécanisme d'actionnement 7 pour provoquer l'ouverture permanente des contacts électriques 4, 6. Le déconnecteur haut-énergie 11 est alors calibré pour agir sur le mécanisme d'actionnement 7 lorsqu'il est traversé par des courants électriques ayant une énergie supérieure au seuil énergétique de déclenchement. Ledit déconnecteur haut-énergie comprend alors des moyens pour agir sur le mécanisme d'actionnement 7 pour provoquer l'ouverture permanente des contacts électriques 4, 6.Preferably, said high energy disconnector is intended to act on the actuating mechanism 7 to cause permanent opening of the electrical contacts 4, 6. The high-energy disconnector 11 is then calibrated to act on the actuating mechanism 7 when it is crossed by electric currents having an energy higher than the triggering energy threshold. Said high-energy disconnector then comprises means for acting on the actuating mechanism 7 to cause permanent opening of the electrical contacts 4, 6.

Selon un mode particulier de réalisation, le déconnecteur haut-énergie 11 comprend de moyens électromagnétiques de déclenchement ou un élément fusible.According to a particular embodiment, the high-energy disconnector 11 comprises electromagnetic tripping means or a fuse element.

Selon une autre variante de réalisation, le dispositif de déconnexion comporte des moyens de réarmement 72. Les moyens de réarmement 72 permettent le déplacement de ladite troisième électrode de la position dite de commutation à la position dite de service. Autrement dit, grâce aux moyens de réarmement 72, il est possible de provoquer mécaniquement la fermeture des contacts 4, 6 après une ouverture permanente desdits contacts. En outre, Les moyens de réarmement 72 permettent aussi d'agir sur le mécanisme d'actionnement 7 pour provoquer l'ouverture permanente des contacts électriques 4, 6.According to another variant embodiment, the disconnecting device comprises resetting means 72. The resetting means 72 allow the displacement of said third electrode from the so-called switching position to the so-called service position. In other words, thanks to the resetting means 72, it is possible to mechanically cause the closing of the contacts 4, 6 after permanent opening of said contacts. In addition, the rearming means 72 also allow to act on the actuating mechanism 7 to cause the permanent opening of the electrical contacts 4, 6.

Claims (14)

  1. A voltage surge protection device (1) comprising:
    - a voltage surge limiter (2) with non-linear elements variable with voltage,
    - a disconnecting device (3) with electric contacts (4, 6) electrically arranged in series with the voltage surge limiter (2) and comprising an actuating mechanism (7) for opening the electric contacts (4, 6),
    - a first and second connecting pad (41, 51),
    the voltage surge limiter (2) being electrically connected to one of the connecting pads (41, 51) by at least one fuse link (8, 9), characterized in that drive means (10) exert a displacement force (Fd) moving the voltage surge limiter (2) in case of melting of said at least one fuse link, movement of said limiter acting directly on the actuating mechanism (7) and causing continuous opening of the contacts (4, 6).
  2. The device according to claim 1, characterized in that the voltage surge limiter (2) is electrically connected to the second connecting pad (51) by a first fuse link (8) that melts in case of overheating of said limiter.
  3. The device according to claim 2, characterized in that the first fuse link (8) is a low-temperature weld.
  4. The device according to any one of claims 1 to 3, characterized in that the disconnecting device comprises:
    - a first connecting electrode (40) in electrical connection with the first connecting pad (41),
    - a second connecting electrode (50) in electrical connection with the second connecting pad (51),
    - a third movable arc switching electrode (60) electrically connected with the second connecting pad (51),
    the actuating mechanism (7) moving the third movable arc switching electrode (60) to bring about continuous opening of the electric contacts (4, 6), and
    the voltage surge limiter (2) being connected in series between the third movable arc switching electrode (60) and the second connecting pad (51), the voltage surge limiter (2) and said second fuse link being simultaneously disconnected from the circuit when an electric arc (100) is switched between the first connecting electrode (40) and the second connecting electrode (50).
  5. The device according to claim 4, characterized in that the voltage surge limiter (2) is electrically connected to the second connecting pad (51) by a second fuse link (9) that melts when AC or DC electric short-circuit currents having a lower energy than a tripping threshold energy flow through the latter, said tripping energy threshold corresponding to the threshold above which electric lightning surge currents of 10/350 or 8/20 type cause continuous opening of the electric contacts (4,6).
  6. The device according to claim 4 or 5, characterized in that the third movable arc switching electrode (60) is connected to the first connecting electrode (40) by an insulating part forming a spark gap when the electric contacts (4, 6) are closed.
  7. The device according to claim 4 or 5, characterized in that the third movable arc switching electrode (60) is in contact with the first connecting electrode (40) when the electric contacts (4, 6) are closed.
  8. The device according to any one of the foregoing claims, characterized in that the voltage surge limiter (2) comprises a variable resistor (21).
  9. The device according to claim 8, characterized in that the voltage surge limiter (2) comprises a variable resistor (21) connected in series with a spark gap (22).
  10. The device according to any one of the foregoing claims, characterized in that the drive means (10) comprise a spring.
  11. The device according to any one of the foregoing claims, characterized in that a high-energy disconnector (11) is connected in series between the first connecting electrode (40) and the first connecting pad (41), said high-energy disconnector (11) being calibrated to disconnect when electric currents having a greater energy than the tripping threshold energy flow through the latter.
  12. The device according to claim 11, characterized in that the high-energy disconnector (11) comprises means for acting on the actuating mechanism (7) to cause continuous opening of the electric contacts (4, 6).
  13. The device according to claim 10 or 11, characterized in that the high-energy disconnector (11) comprises electromagnetic tripping means.
  14. The device according to claim 10 or 11, characterized in that the high-energy disconnector (11) comprises a fuse element.
EP08354007A 2007-02-01 2008-01-24 Device for protecting against voltage surges with a mobile electrode with system for unlocking the disconnection device Active EP1953788B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0700707A FR2912252B1 (en) 2007-02-01 2007-02-01 MOBILE ELECTRODE OVERVOLTAGE PROTECTION DEVICE WITH DISCONNECT DEVICE UNLOCKING SYSTEM

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EP1953788A1 EP1953788A1 (en) 2008-08-06
EP1953788B1 true EP1953788B1 (en) 2010-02-24

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EP (1) EP1953788B1 (en)
CN (1) CN101277013B (en)
AT (1) ATE459089T1 (en)
DE (1) DE602008000677D1 (en)
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FR (1) FR2912252B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2928026B1 (en) * 2008-02-27 2011-08-19 Schneider Electric Ind Sas OVERVOLTAGE PROTECTION DEVICE COMPRISING SELECTIVE DISCONNECT MEANS
FR2954579B1 (en) * 2009-12-18 2014-07-04 Schneider Electric Ind Sas OVERVOLTAGE PROTECTION ASSEMBLY
DE102011015449B4 (en) * 2011-01-25 2014-09-25 Ellenberger & Poensgen Gmbh Switching unit for switching high DC voltages
EP3747100B1 (en) * 2018-01-30 2022-03-16 Hitachi Energy Switzerland AG Surge arrestor dimensioning in a dc power transmission system

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Publication number Priority date Publication date Assignee Title
FR2657994B1 (en) 1990-02-08 1992-04-17 Merlin Gerin DISCONNECTABLE SURGE PROTECTOR FOR LOW VOLTAGE NETWORK.
FR2840448B1 (en) * 2002-05-30 2004-07-23 Schneider Electric Ind Sas OVERVOLTAGE PROTECTION DEVICE
FR2846478B1 (en) * 2002-10-25 2004-12-24 Schneider Electric Ind Sas MOBILE ELECTRODE OVERVOLTAGE PROTECTION DEVICE
FR2871932B1 (en) * 2004-06-18 2006-08-04 Schneider Electric Ind Sas OVERVOLTAGE PROTECTION DEVICE
ES2399966T3 (en) * 2004-10-08 2013-04-04 Abb France Surge protection device provided with arc cutting means and corresponding procedure

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DE602008000677D1 (en) 2010-04-08
EP1953788A1 (en) 2008-08-06
CN101277013B (en) 2012-07-04
CN101277013A (en) 2008-10-01
ES2338830T3 (en) 2010-05-12
FR2912252B1 (en) 2009-03-06
ATE459089T1 (en) 2010-03-15

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