EP1726019B1 - Overvoltage protection device in common/differential mode of reduced size - Google Patents

Overvoltage protection device in common/differential mode of reduced size Download PDF

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Publication number
EP1726019B1
EP1726019B1 EP05736977A EP05736977A EP1726019B1 EP 1726019 B1 EP1726019 B1 EP 1726019B1 EP 05736977 A EP05736977 A EP 05736977A EP 05736977 A EP05736977 A EP 05736977A EP 1726019 B1 EP1726019 B1 EP 1726019B1
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EP
European Patent Office
Prior art keywords
phase
neutral
varistor
ground
housing
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Not-in-force
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EP05736977A
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German (de)
French (fr)
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EP1726019A1 (en
Inventor
Alain René Robert LAGNOUX
Jean-François Michel BURRE-ESPAGNOU
Michel Georges Jean Donati
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ABB France SAS
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ABB France SAS
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C13/00—Resistors not provided for elsewhere
    • H01C13/02—Structural combinations of resistors

Definitions

  • the present invention relates to the general technical field of devices for protecting electrical installations against overvoltages, in particular transient overvoltages due to lightning.
  • the invention relates more particularly to an overvoltage protection device adapted to provide a protection according to the common and differential modes, and comprising at least one electrically insulating housing, specifically adapted to receive at least one electrical pair, formed by a so-called phase varistor.
  • a so-called phase varistor with a phase terminal and a ground terminal, arranged between a first phase to protect and the ground, and a so-called phase-neutral varistor, with a phase terminal and a neutral terminal, arranged between said first phase to protect and neutral, said phase-earth and phase-neutral varistors being mounted next to each other within said housing so as to form a pair of mounting.
  • surge arresters Electrical overvoltage protection devices are widely used, and may be commonly referred to as “ surge arresters ". They have the essential purpose of grounding the lightning currents, and possibly clipping additional voltages induced by these currents to levels compatible with the behavior of equipment and devices to which they are connected.
  • the common mode MC in which the protection components are connected between the active conductors (phase or neutral) and earth
  • the differential mode MD in which the protection components are connected between the active conductors (ie between the phases and the neutral).
  • protection devices comprising varistors are generally used.
  • a varistor is generally mounted per branch, that is to say that to protect a single-phase network, the protection device must comprise an electrical pair formed by at least two varistors in order to ensure the protection according to the two modes mentioned above.
  • the electrical pair will generally include a phase-ground varistor connected between the phase to be protected and earth, and a phase-neutral varistor connected between said phase to be protected and the neutral.
  • it will take at least three electrical pairs to perform the same function.
  • the common mode / differential mode protection devices known thus generally comprise at least two housings (or motors) for provide the protection according to the two aforementioned modes in the case of a single-phase network, and at least six boxes (or motors) to perform the same function in the case of a three-phase network, each housing (or motor) having a only varistor.
  • withdrawable versions of known devices are generally made with two cartridges per phase, that is to say with at least two cartridges interchangeable in the case of a single-phase network and with at least six cartridges interchangeable in the case of a three-phase network.
  • the surge arrester In the case of a single-phase network, the surge arrester then consists of a phase-neutral varistor connected between the phase to be protected and the neutral point, and a spark gap, connected between the neutral point and the ground.
  • each protection component is integrated in an individual cartridge so that the surge arrester comprises two interchangeable cartridges, only one of which is connected to the phase to be protected, which corresponds to the logical configuration expected by the device. user.
  • the surge arrester will comprise three varistors each connected between a phase to be protected and, the neutral, and a spark gap, connected between the neutral and the earth, each protection component being integrated into a individual cartridge.
  • the arrester thus has, in three-phase, four detachable cartridges, among which three cartridges are connected to the three phases to protect, one cartridge per phase, which corresponds to what the user intuitively expects to find.
  • Such devices thus make it possible to ensure the protection of the network on the one hand in common mode, by putting in series the two phase-neutral and neutral-earth branches, and on the other hand in differential mode, thanks to the phase branch. -neutral.
  • this assembly is not usable for all types of network, and in particular those for which the connection diagram of the neutral to the ground is of the type IT (isolated neutral of the ground or impedant).
  • this assembly is not suitable for cascading surge arresters.
  • a first surge arrester located upstream, comprises a varistor in its neutral-earth branch
  • a second surge arrester placed downstream comprises a spark gap in its neutral-earth branch
  • the spark gap placed downstream will flow.
  • most of the lightning current, and the varistor placed upstream will be little requested, which goes against the objectives sought when we coordinate two surge arresters.
  • EP-A-0867 896 an overvoltage protection device corresponding to the preamble of claim 1.
  • the objects assigned to the invention therefore aim to remedy the various disadvantages listed above and to propose a new surge protection device adapted to provide a protection according to the common and differential modes which does not have the drawbacks listed above, and which, while being compatible with all connection diagrams of the neutral to the earth, has a limited space requirement.
  • Another object of the invention is to propose a new protection device whose maintenance is particularly easy.
  • Another object of the invention is to propose a new protection device which, in its withdrawable version, is particularly easy to use, in a logical and intuitive manner.
  • Another object of the invention is to propose a new protection device whose adaptation to each type of network is particularly easy.
  • the overvoltage protection device according to the invention is intended to be connected bypass on the equipment or electrical installation to be protected.
  • electrical installation refers to all types of devices or networks likely to experience voltage disturbances of various origins, including transient overvoltages due to lightning.
  • the protection device according to the invention is preferably a low-voltage surge arrester, that is to say that it is preferably intended to protect low voltage installations (for example from 50 volts to 750 volts).
  • the overvoltage protection device 1 will now be described with reference to the Figures 1 to 5 .
  • the overvoltage protection device 1 is adapted to provide protection according to the common and differential modes, that is to say that it must be able to be used either in common mode or in differential mode, and that without it is necessary to modify in any way the device, and in particular the nature and mounting of the protective components constituting it.
  • the protective device 1 comprises at least one electrically insulating housing 2, that is to say advantageously made from a non-electrically conductive material.
  • the protection device 1 also comprises at least one electrical pair, formed by a so-called phase-to-earth varistor PT, arranged between a first phase L1 to be protected and earth T and a so-called phase-neutral varistor PN, arranged between said first phase L1 to be protected and the neutral N.
  • a so-called phase-to-earth varistor PT arranged between a first phase L1 to be protected and earth T
  • phase-neutral varistor PN so-called phase-neutral varistor
  • phase-to-earth varistor PT is arranged to ensure the protection of the electrical installation in common mode (ie between an active conductor and the earth), while the phase-neutral varistor PN is arranged to provide the protection in differential mode (ie between two active conductors).
  • the housing 2 is specifically adapted to receive the electrical pair formed by the phase-to-earth and phase-to-neutral varistors PN, that is to say, it is sized to receive, at most, two varistors.
  • the phase-to-earth and PN phase-neutral varistors PN forming the electrical pair are mounted next to each other within the housing 2 so as to form a pair of mounting 3.
  • the protection device 1 thus designed advantageously has a small footprint, the phase-to-earth varistors PT and phase-neutral PN is no longer, as in the devices of the prior art, mounted in individual housings but grouped within the same housing 2 .
  • each phase-to-earth or phase-to-neutral PV varistor PN is advantageously provided with its own means of disconnection, preferably of the thermal type, such that the thermal runaway is stopped sufficiently early in the event of aging of the cells. varistors.
  • the disconnecting means may be formed by a disconnection blade 4 which extends between two ends 4A, 4B, one of said ends 4A being preferably fixed by means of a hot-melt welding on one of the poles of the associated varistor.
  • the end 4A of the disconnection blade 4 is thus preferably welded in stress, so that the heating of the varistor at the end of life causes the fusion of the weld which, once broken, allows the release of the blade disconnection 4 and thus the disconnection of the associated varistor of the electrical installation.
  • the casing 2, provided with the phase-to-earth and phase-to-neutral PN varistors provided with their disconnection means 4, then advantageously forms a " double " motor, that is to say a motor provided with two varistors.
  • the housing 2 may be formed by a simple support, not necessarily closed, but specifically adapted to receive the electrical pair formed by the pair of phase-to-earth varistors PT and phase-neutral PN.
  • the protective device 1 thus designed can be easily adapted to be in a withdrawable version.
  • the protective device 1 advantageously comprises a base 6 preferably fixed, that is to say permanently connected to the electrical installation to protect ( Figure 6).
  • each housing 2 is then provided with racking / unplugging means 7 ( figure 2 ) adapted to allow the removable electrical connection of the housing 2 relative to the base 6.
  • the racking-in / racking-out means 7 are advantageously formed by four pads 8A, 8B, 9A, 9B allowing the casing 2 to be plugged onto the base 6.
  • the poles of the phase-to-earth and phase-to-neutral varistors PN are thus advantageously respectively connected to the pads 8A, 8B on the one hand and 9A, 9B on the other hand.
  • the base 6 is preferably provided with a housing 10 arranged to receive the housing 2, and on the bottom 10A of which are formed four openings 8'A, 8'B, 9'A, 9'B specifically adapted for receive respectively the pads 8A, 8B, 9A, 9B.
  • the housing 2 provided with its racking / unplugging means 7 constitutes an interchangeable cartridge 11.
  • the housing 2 provided with its racking / unplugging means 7 constitutes an interchangeable cartridge 11.
  • the protection device 1 is designed to provide protection for a single-phase network.
  • the protection device 1 comprises at least one housing 2 (in dotted lines on the figure 4 ) provided with a mounting pair formed by a phase-to-earth varistor PT and a PN phase-neutral varistor, said pair of mounting being electrically connected to the L1 phase to be protected.
  • the phase-to-earth varistor PT is electrically connected between the L1 phase to be protected and the earth T, thus providing protection in common mode
  • the phase-neutral variable PN is connected between the phase L1 and the neutral point N so as to provide differential mode protection.
  • the protection device 1 is designed to protect a three-phase network and comprises for this purpose at least three housings 2A, 2B, 2C (dashed on the figure 5 ) each provided with a pair of mounting electrically connected to one of the phases L1, L2, L3 to be protected.
  • the housing 2A contains a phase-to-earth varistor PT connected between the first phase L1 to be protected and earth, and a phase-to-neutral varistor PN connected between said phase L1 and the neutral point N.
  • the housing 2B has a phase-to-earth varistor PT connected between the second phase L2 to be protected and earth, and a phase-to-neutral varistor PN connected between the second phase L2 and the neutral point N.
  • the third housing 2C comprises a phase-earth varistor PT, connected between the third phase L3 to be protected and earth, and a phase-to-neutral varistor PN connected between said third phase L3 and the neutral point N.
  • the protection device 1 may be adapted to provide protection for a polyphase network comprising a number N of phases.
  • the protective device 1 advantageously comprises a number of housings 2 at least equal to the number N of phases, each housing 2 being provided with a mounting pair 3.
  • the protection device 1 is called " multipolar ".
  • the protection device 1 comprises, when multipole, insulating means 30, arranged between two pairs of mounting 3 consecutive, that is to say, juxtaposed, so as to electrically isolate one of the other.
  • the insulating means 30 thus make it possible to avoid the formation of short circuits that can occur between two pairs of mounting 3 consecutive and close together, because of their connection to active conductors and especially to phases L1, L2, L3 potential different. Thanks to the insulating means 30, it is possible to bring the pairs of mounting 3 to each other, and thus reduce the overall size of the device, while avoiding the formation of short circuits between two pairs of mounting 3 consecutive.
  • the insulating means 30 are formed by a screen of electrically insulating material, interposed between two pairs of mounting 3 consecutive.
  • the insulating means 30, and in particular the insulating screen are advantageously designed and dimensioned so as to increase the isolation distance between two consecutive assembly pairs 3, in order to prevent the formation of electric arcs between the latter while retaining a small spacing distance, less than the isolation distance, between the pairs of mounting 3, so as to limit the size of the device.
  • isolation distance refers here to the minimum distance that the electric arc must travel in the gaseous dielectric medium, by example the air, separating the pairs of mounting 3.
  • the protection device 1 may comprise a so-called neutral-earthed variable NT, arranged between the neutral and the earth, said varistor being mounted within an additional housing 2S, as shown on the Figures 4 and 5 .
  • the additional box 2S may either be specifically designed to contain a single varistor, or be similar in all respects to the case 2, with the difference that it will receive only one NT neutral-earth varistor as shown in FIGS. Figures 4 and 5 . In the latter case, a 2V part of the additional box 2S will then be unused.
  • the protection device 1 then having more than one housing 2 in the case of a single-phase network and three boxes 2A, 2B, 2C in the case of a three-phase network.
  • the protection device 1 thus advantageously has a small footprint, with a maximum of two boxes 2, 2S in single phase and at most four housings 2A, 2B, 2C, 2S three-phase.
  • the protection device 1 having only one housing 2, 2A, 2B, 2C (or motor) per active conductor, the manipulation of withdrawable versions of this device is particularly easy, the user intuitively combining an L1 phase , L2 or L3 to be protected to a single corresponding cartridge 11.
  • This aspect of the invention is particularly interesting in the case of polyphase networks comprising a large number of active conductors.
  • the base 6 may have several housings, each housing being capable of receiving a cartridge 11, or a single housing arranged to receive all the cartridges 11 above-mentioned.
  • each phase-to-earth PV, phase-neutral PN or earth-neutral NT is connected to the network by means of electrical connection means 15, the electrical connection to earth being made using other means of electrical connection 16.
  • the electrical connection means 15, 16 are, preferably and conventional, of wired nature.
  • each phase-earth varistor PT comprises a so-called phase terminal p electrically connected to the phase L1, L2 or L3 to be protected, and a so-called earth terminal t, electrically connected to the earth T.
  • each PN phase-neutral varistor comprises a so-called phase terminal p electrically connected to the phase L1, L2 or L3 to be protected and a so-called neutral terminal n electrically connected to the neutral N.
  • the phase-to-earth and phase-to-neutral varistors PN are arranged next to each other within the housing 2, 2A, 2B, 2C.
  • the neutral n and earth terminals t are not at the same potential so that if the latter are too close to each other, an electric arc is likely to be formed between said terminals n, t, thus bypassing the protection device 1.
  • the protection device 1 advantageously comprises electrical insulation means 20, adapted to electrically isolate the earth terminal t from the neutral terminal n and preferably arranged within the housing 2, 2A, 2B , 2C.
  • the electrical insulation means 20 are advantageously arranged and arranged to form an insulating screen between said earth terminal t and said neutral terminal n.
  • the electrical insulation means 20 may be formed by an electrically insulating separating partition 21 interposed between the earth terminal t and the neutral terminal n so as to guarantee the electrical insulation said earth terminals t and neutral n relative to one another.
  • the electrical insulation means 20 are designed and dimensioned to increase the isolation distance between the earth terminal t and the neutral terminal n, so that the isolation distance is greater than the spacing distance. actual separating said earth terminals t and neutral n.
  • the electrical insulation means 20 thus make it possible to shorten the spacing distance between the neutral n and earth terminals t, thus reducing the size of the device, while guaranteeing their electrical insulation, and this by increasing the distance of isolation between the neutral n and earth terminals t, that is to say the length of the path to be traveled by the electric arc between said neutral terminals n and earth t to bypass the electrical insulation means 20.
  • the partition wall 21 may for example extend over a surface just sufficient to provide isolation between earth terminals t and neutral n.
  • the partition wall 21 will preferably be disposed inside the housing 2 so as to separate the latter into two housings 22, 23 substantially symmetrical with respect to the partition wall 21, each housing 22, 23 being capable of receiving a varistor equipped with its means of disconnection. Even more preferentially, and as represented on the Figures 1 and 2 the partition wall 21 may extend outside the housing 2, so as to separate the pair of pads 8A, 8B associated with the phase-earth varistor PT, of the pair of pads 9A, 9B associated with the varistor phase-neutral PN.
  • the base 6 advantageously comprises a central housing 60, specifically adapted to receive the outgoing end of the partition wall 21 during the racking of the housing 2 on the base 6.
  • Such a configuration makes it possible in particular to avoid arcing between the pads 8A, 9A of different potentials, respectively connected to the earth terminal t and the neutral terminal n during plugging.
  • the phase-to-earth and phase-to-neutral varistors PN of the same assembly pair 3 have different operating voltages from one another.
  • the PN phase-neutral varistor has a lower operating voltage than the PT phase-earth varistor, which allows on the one hand to lower the protection level of the arrester, and on the other hand to reduce the clutter of the electrical pair.
  • the phase-earth varistor PT may have a service voltage of the order of 440 volts so as to withstand the voltage between phases (of the order of 400 volts) as required by French standards, the phase varistor -Neutre PN having a lower operating voltage, of the order of 275 volts.
  • each cartridge 11 will thus advantageously comprise a pair of varistors of different values, and this without creating any confusion in the mind of the user, since each active conductor remains associated with a single cartridge 11.
  • the phase-to-earth varistor PT comprising a phase terminal p electrically connected to the phase L1, L2 or L3 to be protected and a so-called earth terminal t, electrically connected to earth T
  • the phase-neutral varistor PN comprising a so-called phase terminal p, electrically connected to said phase L1, L2 or L3 to be protected and a so-called neutral terminal n, electrically connected to the neutral
  • the method also comprises a step in which electrical isolation means are available 20 between the earth terminal t and the neutral terminal n.
  • the invention thus makes it possible to significantly reduce the dimensions and therefore the size of a protection device 1 of the common mode / differential mode mode, while ensuring the electrical insulation between the components of the device having different potentials.
  • Another advantage of the invention is to allow easy and intuitive removal of the worn out protection components, with a view to their replacement.
  • protection device 1 Another advantage of the protection device 1 according to the invention is that it can be used regardless of the connection diagram of the neutral to earth.
  • protection device 1 requires a number of parts, including engines, reduced compared to the devices of the prior art, while providing the same functions.
  • the solution offered by the invention is therefore more economical than existing solutions.
  • Another advantage of the invention is that it makes it possible to rationalize the method of manufacturing the protection device 1 according to the invention, in particular by systematically resorting to double motors.
  • the invention finds its industrial application in the design and manufacture of transient overvoltage protection devices.

Abstract

The invention relates to an overvoltage protection device (1) embodied to provide protection in common or differential modes and comprising at least one electrically-insulated housing (2), specifically embodied to house at least one electrical binomial, formed by a so-called ground-phase varistor (PT), with a phase connector (p) and a ground connector (t), arranged between a first phase (L1) for protection and ground (T) and a so-called neutral-phase varistor (PN), with a phase connector (p) and a neutral connector (n), arranged between said first phase (L1) for protection and neutral (N), said phase-ground (PT) and phase-neutral (PN) varistors being mounted next to each other within said housing (2) such as to form an assembly binomial (3), characterised in that the protection device (1) comprises electrical insulation means (20), embodied for the electrical insulation of the ground connection (t) from the phase-ground varistor (PT) and the neutral connection (n) from the phase-neutral varistor (PN). The invention relates to devices for protection against overvoltages.

Description

DOMAINE TECHNIQUETECHNICAL AREA

La présente invention se rapporte au domaine technique général des dispositifs de protection d'installations électriques contre les surtensions, notamment les surtensions transitoires dues à la foudre.The present invention relates to the general technical field of devices for protecting electrical installations against overvoltages, in particular transient overvoltages due to lightning.

L'invention concerne plus particulièrement un dispositif de protection contre les surtensions adapté pour assurer une protection suivant les modes commun et différentiel, et comprenant au moins un boîtier électriquement isolant, spécifiquement adapté pour recevoir au moins un binôme électrique, formé par une varistance dite phase-terre, avec une borne de phase et une borne de terre, disposée entre une première phase à protéger et la terre, et une varistance dite phase-neutre, avec une borne de phase et une borne de neutre, disposée entre ladite première phase à protéger et le neutre, lesdites varistances phase-terre et phase-neutre étant montées l'une à côté de l'autre au sein dudit boîtier de manière à former un binôme de montage.The invention relates more particularly to an overvoltage protection device adapted to provide a protection according to the common and differential modes, and comprising at least one electrically insulating housing, specifically adapted to receive at least one electrical pair, formed by a so-called phase varistor. -terre, with a phase terminal and a ground terminal, arranged between a first phase to protect and the ground, and a so-called phase-neutral varistor, with a phase terminal and a neutral terminal, arranged between said first phase to protect and neutral, said phase-earth and phase-neutral varistors being mounted next to each other within said housing so as to form a pair of mounting.

TECHNIQUE ANTERIEUREPRIOR ART

Les dispositifs de protection d'installations électriques contre les surtensions sont largement utilisés, et peuvent être communément désignés sous l'appellation « parafoudres ». Ils ont en effet pour but essentiel d'écouler à la terre des courants de foudre, et éventuellement d'écrêter des tensions additionnelles induites par ces courants à des niveaux compatibles avec la tenue des équipements et appareils auxquels ils sont raccordés.Electrical overvoltage protection devices are widely used, and may be commonly referred to as " surge arresters ". They have the essential purpose of grounding the lightning currents, and possibly clipping additional voltages induced by these currents to levels compatible with the behavior of equipment and devices to which they are connected.

Il existe, de façon classique, deux modes de protection contre les surtensions, à savoir le mode commun MC, dans lequel les composants de protection sont raccordés entre les conducteurs actifs (phases ou neutre) et la terre, et le mode différentiel MD, dans lequel les composants de protection sont raccordés entre les conducteurs actifs (i.e. entre les phases et le neutre).There are, in a conventional way, two overvoltage protection modes, namely the common mode MC, in which the protection components are connected between the active conductors (phase or neutral) and earth, and the differential mode MD, in which the protection components are connected between the active conductors (ie between the phases and the neutral).

Pour assurer la protection de l'installation suivant ces deux modes commun et différentiel, on a généralement recours à des dispositifs de protection comportant des varistances.To protect the installation according to these two common and differential modes, protection devices comprising varistors are generally used.

Dans les dispositifs connus, on monte généralement une varistance par branche, c'est-à-dire que pour protéger un réseau monophasé, le dispositif de protection devra comporter un binôme électrique formé par au moins deux varistances afin d'assurer la protection suivant les deux modes sus-mentionnés. Ainsi, en monophasé, le binôme électrique comportera généralement une varistance dite phase-terre raccordée entre la phase à protéger et la terre, et une varistance dite phase-neutre, raccordée entre ladite phase à protéger et le neutre. Dans le cas d'un réseau triphasé, il faudra au minimum trois binômes électriques pour assurer la même fonction.In the known devices, a varistor is generally mounted per branch, that is to say that to protect a single-phase network, the protection device must comprise an electrical pair formed by at least two varistors in order to ensure the protection according to the two modes mentioned above. Thus, in single-phase, the electrical pair will generally include a phase-ground varistor connected between the phase to be protected and earth, and a phase-neutral varistor connected between said phase to be protected and the neutral. In the case of a three-phase network, it will take at least three electrical pairs to perform the same function.

Conformément aux exigences de la normalisation (NF-EN61643-11 et NFC 61740/95), la fin de vie des varistances doit être impérativement contrôlée, ce qui nécessite l'utilisation de déconnecteurs intégrés, par exemple de type thermique, chaque varistance étant alors munie de son propre système de déconnexion. La varistance et son système de déconnexion sont alors montés dans un boîtier-support, l'ensemble constituant ce qui sera dénommé dans la suite un « moteur ».In accordance with the requirements of the standardization (NF-EN61643-11 and NFC 61740/95), the end of life of the varistors must be imperatively controlled, which requires the use of integrated disconnectors, for example of thermal type, each varistor being then equipped with its own disconnection system. The varistor and its disconnection system are then mounted in a housing-support, the assembly constituting what will be referred to hereafter as a " motor ".

Les dispositifs de protection mode commun/mode différentiel connus comportent ainsi généralement au minimum deux boîtiers (ou moteurs) pour assurer la protection suivant les deux modes sus-mentionnés dans le cas d'un réseau monophasé, et au minimum six boîtiers (ou moteurs) pour assurer la même fonction dans le cas d'un réseau triphasé, chaque boîtier (ou moteur) comportant une seule varistance.The common mode / differential mode protection devices known thus generally comprise at least two housings (or motors) for provide the protection according to the two aforementioned modes in the case of a single-phase network, and at least six boxes (or motors) to perform the same function in the case of a three-phase network, each housing (or motor) having a only varistor.

Les dispositifs connus, s'ils assurent convenablement la protection du réseau ou de l'installation électrique, souffrent néanmoins de plusieurs inconvénients.The known devices, if they properly protect the network or the electrical installation, nevertheless suffer from several disadvantages.

Tout d'abord, de tels dispositifs sont particulièrement encombrants, chaque boîtier (ou moteur) générant un encombrement individuel multiplié par le nombre de boîtiers utilisés. Dès lors, on comprend que dans le cas d'un réseau polyphasé, ces dispositifs peuvent occuper un volume non négligeable, alors que pour un nombre croissant d'applications, on cherche justement à réduire les dimensions des dispositifs de protection et à les rendre les plus discrets possibles.First, such devices are particularly bulky, each housing (or motor) generating an individual footprint multiplied by the number of housings used. Therefore, it is understood that in the case of a polyphase network, these devices can occupy a significant volume, while for an increasing number of applications, it is precisely to reduce the dimensions of the protective devices and to make them more discreet possible.

En outre, les versions débrochables des dispositifs connus sont généralement réalisées avec deux cartouches par phase, c'est-à-dire avec au moins deux cartouches interchangeables dans le cas d'un réseau monophasé et avec au moins six cartouches interchangeables dans le cas d'un réseau triphasé.In addition, withdrawable versions of known devices are generally made with two cartridges per phase, that is to say with at least two cartridges interchangeable in the case of a single-phase network and with at least six cartridges interchangeable in the case of a three-phase network.

Or, une telle configuration revêt un caractère particulièrement complexe pour l'utilisateur qui s'attend logiquement à trouver une seule cartouche par phase et non deux cartouches par phase comme dans les dispositifs connus.However, such a configuration is particularly complex for the user who logically expects to find a single cartridge per phase and not two cartridges per phase as in known devices.

Pour palier ces inconvénients, il est connu de combiner les varistances avec un éclateur.To overcome these disadvantages, it is known to combine the varistors with a spark gap.

Dans le cas d'un réseau monophasé, le parafoudre est alors composé d'une varistance dite phase-neutre raccordée entre la phase à protéger et le point neutre, et d'un éclateur, raccordé entre le point neutre et la terre. Dans les versions débrochables du dispositif, chaque composant de protection est intégré dans une cartouche individuelle de telle sorte le parafoudre comporte deux cartouches interchangeables, dont une seule est raccordée à la phase à protéger, ce qui correspond bien à la configuration logique attendue par l'utilisateur. De façon équivalente, dans le cas d'un réseau triphasé, le parafoudre comportera trois varistances reliées chacune entre une phase à protéger et, le neutre, et un éclateur, raccordé entre le neutre et la terre, chaque composant de protection étant intégré dans une cartouche individuelle. Le parafoudre comporte ainsi, en triphasé, quatre cartouches débrochables, parmi lesquelles trois cartouches sont raccordées aux trois phases à protéger, soit une cartouche par phase, ce qui correspond à ce que l'utilisateur s'attend intuitivement à trouver.In the case of a single-phase network, the surge arrester then consists of a phase-neutral varistor connected between the phase to be protected and the neutral point, and a spark gap, connected between the neutral point and the ground. In withdrawable versions of the device, each protection component is integrated in an individual cartridge so that the surge arrester comprises two interchangeable cartridges, only one of which is connected to the phase to be protected, which corresponds to the logical configuration expected by the device. user. Equivalently, in the case of a three-phase network, the surge arrester will comprise three varistors each connected between a phase to be protected and, the neutral, and a spark gap, connected between the neutral and the earth, each protection component being integrated into a individual cartridge. The arrester thus has, in three-phase, four detachable cartridges, among which three cartridges are connected to the three phases to protect, one cartridge per phase, which corresponds to what the user intuitively expects to find.

De tels dispositifs permettent ainsi d'assurer la protection du réseau d'une part en mode commun, par la mise en série des deux branches phase-neutre et neutre-terre, et d'autre part en mode différentiel, grâce à la branche phase-neutre.Such devices thus make it possible to ensure the protection of the network on the one hand in common mode, by putting in series the two phase-neutral and neutral-earth branches, and on the other hand in differential mode, thanks to the phase branch. -neutral.

Toutefois, ce montage n'est pas utilisable pour tous les types de réseau, et notamment ceux pour lesquels le schéma de raccordement du neutre à la terre est du type IT (neutre isolé de la terre ou impédant).However, this assembly is not usable for all types of network, and in particular those for which the connection diagram of the neutral to the ground is of the type IT (isolated neutral of the ground or impedant).

En outre, ce montage n'est pas adapté à la mise en cascade des parafoudres. En particulier, lorsqu'un premier parafoudre, situé en amont, comprend une varistance dans sa branche neutre-terre, et qu'un deuxième parafoudre, placé en aval comprend un éclateur dans sa branche neutre-terre, l'éclateur placé en aval écoulera, en cas de surtension, la plus grande partie du courant de foudre, et la varistance placée en amont sera peu sollicitée, ce qui va à l'encontre des objectifs recherchés lorsque l'on coordonne deux parafoudres.In addition, this assembly is not suitable for cascading surge arresters. In particular, when a first surge arrester, located upstream, comprises a varistor in its neutral-earth branch, and a second surge arrester, placed downstream comprises a spark gap in its neutral-earth branch, the spark gap placed downstream will flow. , in case of overvoltage, most of the lightning current, and the varistor placed upstream will be little requested, which goes against the objectives sought when we coordinate two surge arresters.

Par ailleurs, il est connu de EP-A-0867 896 un dispositif de protection contre les surtensions correspondant au préambule de la revendication 1.Moreover, it is known to EP-A-0867 896 an overvoltage protection device corresponding to the preamble of claim 1.

On voit donc tout l'intérêt d'essayer de réaliser un dispositif de protection contre les surtensions susceptible de fonctionner dans les deux modes commun et différentiel qui, tout en étant peu encombrant, soit compatible avec tous les types de schémas de raccordement du neutre à la terre, notamment les régimes TT, TN-S, TN-C ou IT, facilitant ainsi le choix de l'utilisateur final, d'autant plus que l'information relative au régime de neutre du réseau n'est pas nécessairement connue de l'utilisateur.We therefore see the whole point of trying to achieve an overvoltage protection device capable of operating in both common and differential modes which, while being compact, is compatible with all types of connection diagrams of the neutral to the earth, in particular the TT, TN-S, TN-C or IT regimes, thus facilitating the choice of the end-user, especially since the information relating to the neutral system of the network is not necessarily known to the user. the user.

EXPOSE DE L'INVENTIONSUMMARY OF THE INVENTION

Les objets assignés à l'invention visent en conséquence à porter remède aux divers inconvénients énumérés précédemment et à proposer un nouveau dispositif de protection contre les surtensions adapté pour assurer une protection suivant les modes commun et différentiel qui ne présente pas les inconvénients énumérés précédemment, et qui, tout en étant compatible avec tous les schémas de raccordement du neutre à la terre, présente un encombrement limité.The objects assigned to the invention therefore aim to remedy the various disadvantages listed above and to propose a new surge protection device adapted to provide a protection according to the common and differential modes which does not have the drawbacks listed above, and which, while being compatible with all connection diagrams of the neutral to the earth, has a limited space requirement.

Un autre objet de l'invention vise à proposer un nouveau dispositif de protection dont la maintenance est particulièrement facile.Another object of the invention is to propose a new protection device whose maintenance is particularly easy.

Un autre objet de l'invention vise à proposer un nouveau dispositif de protection qui, dans sa version débrochable, soit particulièrement facile à utiliser, et ce de manière logique et intuitive.Another object of the invention is to propose a new protection device which, in its withdrawable version, is particularly easy to use, in a logical and intuitive manner.

Un autre objet de l'invention vise à proposer un nouveau dispositif de protection dont l'adaptation à chaque type de réseau est particulièrement facile.Another object of the invention is to propose a new protection device whose adaptation to each type of network is particularly easy.

Les objets assignés à l'invention sont atteints à l'aide d'un dispositif de protection contre les surtensions tel que défini dans la revendication 1. Les autres revendications définissent des modes de réalisation préférés.The objects assigned to the invention are achieved by means of an overvoltage protection device as defined in claim 1. The other claims define preferred embodiments.

DESCRIPTIF SOMMAIRE DES DESSINSSUMMARY DESCRIPTION OF THE DRAWINGS

D'autres particularités et avantages de l'invention apparaîtront et ressortiront plus en détails à la lecture de la description faite ci-après, en référence aux dessins annexés, donnés à titre purement illustratif et non limitatif, dans lesquels :

  • La figure 1 illustre, selon une vue en coupe partielle, un boîtier au sein duquel est monté le binôme de montage.
  • La figure 2 illustre, selon une vue générale en perspective, le boîtier conforme à l'invention dans une version débrochable.
  • La figure 3 illustre, selon une vue en perspective, une embase sur laquelle le boîtier illustré à la figure 2 est destiné à être monté.
  • La figure 4 illustre un schéma électrique de principe du dispositif de protection contre les surtensions conforme à l'invention dans le cas d'un réseau monophasé.
  • La figure 5 illustre un schéma électrique de principe du dispositif de protection contre les surtensions conforme à l'invention dans le cas d'un réseau triphasé.
Other features and advantages of the invention will appear and will appear in more detail on reading the description given below, with reference to the accompanying drawings, given for purely illustrative and non-limiting purposes, in which:
  • The figure 1 illustrates, in a partial sectional view, a housing in which is mounted the mounting pair.
  • The figure 2 illustrates, in a general perspective view, the housing according to the invention in a withdrawable version.
  • The figure 3 illustrates, in a perspective view, a base on which the housing shown in FIG. figure 2 is intended to be mounted.
  • The figure 4 illustrates an electrical circuit diagram of the overvoltage protection device according to the invention in the case of a single-phase network.
  • The figure 5 illustrates an electrical circuit diagram of the overvoltage protection device according to the invention in the case of a three-phase network.

MEILLEURE MANIERE DE REALISER L'INVENTIONBEST MODE OF REALIZING THE INVENTION

Le dispositif de protection contre les surtensions conforme à l'invention est destiné à être branché en dérivation sur l'équipement ou l'installation électrique à protéger.The overvoltage protection device according to the invention is intended to be connected bypass on the equipment or electrical installation to be protected.

L'expression « installation électrique » fait référence à tous types d'appareils ou réseaux susceptibles de subir des perturbations de tension d'origines diverses, et notamment des surtensions transitoires dues à la foudre.The term " electrical installation " refers to all types of devices or networks likely to experience voltage disturbances of various origins, including transient overvoltages due to lightning.

Le dispositif de protection conforme à l'invention est de préférence un parafoudre basse tension, c'est-à-dire qu'il est préférentiellement destiné à protéger des installations basses tensions (par exemple de 50 volts à 750 volts).The protection device according to the invention is preferably a low-voltage surge arrester, that is to say that it is preferably intended to protect low voltage installations (for example from 50 volts to 750 volts).

Le dispositif de protection 1 contre les surtensions va maintenant être décrit en se référant aux figures 1 à 5.The overvoltage protection device 1 will now be described with reference to the Figures 1 to 5 .

Le dispositif de protection 1 contre les surtensions est adapté pour assurer une protection suivant les modes commun et différentiel, c'est-à-dire qu'il doit pouvoir être utilisé soit en mode commun, soit en mode différentiel, et ce sans qu'il soit nécessaire de modifier en aucune façon le dispositif, et notamment la nature et le montage des composants de protection le constituant.The overvoltage protection device 1 is adapted to provide protection according to the common and differential modes, that is to say that it must be able to be used either in common mode or in differential mode, and that without it is necessary to modify in any way the device, and in particular the nature and mounting of the protective components constituting it.

Selon l'invention, et tel que cela est représenté sur les figures 1 et 2, le dispositif de protection 1 comporte au moins un boîtier 2 électriquement isolant, c'est-à-dire avantageusement fabriqué à partir d'un matériau non conducteur de l'électricité.According to the invention, and as shown on the Figures 1 and 2 , the protective device 1 comprises at least one electrically insulating housing 2, that is to say advantageously made from a non-electrically conductive material.

Selon l'invention, le dispositif de protection 1 comporte également au moins un binôme électrique, formé par une varistance dite phase-terre PT, disposée entre une première phase L1 à protéger et la terre T et une varistance dite phase-neutre PN, disposée entre ladite première phase L1 à protéger et le neutre N.According to the invention, the protection device 1 also comprises at least one electrical pair, formed by a so-called phase-to-earth varistor PT, arranged between a first phase L1 to be protected and earth T and a so-called phase-neutral varistor PN, arranged between said first phase L1 to be protected and the neutral N.

Ainsi, la varistance phase-terre PT est agencée pour assurer la protection de l'installation électrique en mode commun (i.e. entre un conducteur actif et la terre), alors que la varistance phase-neutre PN est agencée pour assurer la protection en mode différentiel (i.e. entre deux conducteurs actifs).Thus, the phase-to-earth varistor PT is arranged to ensure the protection of the electrical installation in common mode (ie between an active conductor and the earth), while the phase-neutral varistor PN is arranged to provide the protection in differential mode (ie between two active conductors).

Selon l'invention, et tel que cela est représenté sur la figure 1, le boîtier 2 est spécifiquement adapté pour recevoir le binôme électrique formé par les varistances phase-terre PT et phase-neutre PN, c'est-à-dire qu'il est dimensionné pour recevoir, au maximum, deux varistances.According to the invention, and as shown on the figure 1 , the housing 2 is specifically adapted to receive the electrical pair formed by the phase-to-earth and phase-to-neutral varistors PN, that is to say, it is sized to receive, at most, two varistors.

Selon l'invention, les varistances phase-terre PT et phase-neutre PN formant le binôme électrique sont montées l'une à côté de l'autre au sein du boîtier 2 de manière à former un binôme de montage 3. Le dispositif de protection 1 ainsi conçu présente avantageusement un encombrement réduit, les varistances phase-terre PT et phase-neutre PN n'étant plus, comme dans les dispositifs de l'art antérieur, montées dans des boîtiers individuels mais regroupées au sein d'un même boîtier 2.According to the invention, the phase-to-earth and PN phase-neutral varistors PN forming the electrical pair are mounted next to each other within the housing 2 so as to form a pair of mounting 3. The protection device 1 thus designed advantageously has a small footprint, the phase-to-earth varistors PT and phase-neutral PN is no longer, as in the devices of the prior art, mounted in individual housings but grouped within the same housing 2 .

Conformément aux exigences de la normalisation, chaque varistance phase-terre PT ou phase-neutre PN est avantageusement pourvue de son propre moyen de déconnexion, de préférence de type thermique de telle sorte que l'emballement thermique soit stoppé suffisamment tôt en cas de vieillissement des varistances.According to the requirements of the standardization, each phase-to-earth or phase-to-neutral PV varistor PN is advantageously provided with its own means of disconnection, preferably of the thermal type, such that the thermal runaway is stopped sufficiently early in the event of aging of the cells. varistors.

De façon particulièrement avantageuse, et tel que cela est représenté sur la figure 1, le moyen de déconnexion peut être formé par une lame de déconnexion 4 qui s'étend entre deux extrémités 4A, 4B, l'une desdites extrémités 4A étant de préférence fixée à l'aide d'une soudure thermofusible sur l'un des pôles de la varistance associée. L'extrémité 4A de la lame de déconnexion 4 est ainsi de préférence soudée en contrainte, de telle sorte que l'échauffement de la varistance en fin de vie entraîne la fusion de la soudure qui, une fois rompue, permet la libération de la lame de déconnexion 4 et donc la déconnexion de la varistance associée de l'installation électrique. Le boîtier 2, pourvu des varistances phase-terre PT et phase-neutre PN munies de leur moyen de déconnexion 4, forme alors avantageusement un moteur « double », c'est-à-dire un moteur pourvu de deux varistances.In a particularly advantageous way, and as shown on the figure 1 , the disconnecting means may be formed by a disconnection blade 4 which extends between two ends 4A, 4B, one of said ends 4A being preferably fixed by means of a hot-melt welding on one of the poles of the associated varistor. The end 4A of the disconnection blade 4 is thus preferably welded in stress, so that the heating of the varistor at the end of life causes the fusion of the weld which, once broken, allows the release of the blade disconnection 4 and thus the disconnection of the associated varistor of the electrical installation. The casing 2, provided with the phase-to-earth and phase-to-neutral PN varistors provided with their disconnection means 4, then advantageously forms a " double " motor, that is to say a motor provided with two varistors.

Bien évidemment, le boîtier 2 pourra être formé par un simple support, non nécessairement fermé, mais spécifiquement adapté pour recevoir le binôme électrique formé par la paire de varistances phase-terre PT et phase-neutre PN.Of course, the housing 2 may be formed by a simple support, not necessarily closed, but specifically adapted to receive the electrical pair formed by the pair of phase-to-earth varistors PT and phase-neutral PN.

Selon une caractéristique particulièrement intéressante de l'invention, le dispositif de protection 1 ainsi conçu peut être aisément adapté pour se présenter sous une version débrochable.According to a particularly advantageous characteristic of the invention, the protective device 1 thus designed can be easily adapted to be in a withdrawable version.

A cet effet, le dispositif de protection 1 comporte avantageusement une embase 6 de préférence fixe, c'est-à-dire raccordée en permanence à l'installation électrique à protéger (figure 6).For this purpose, the protective device 1 advantageously comprises a base 6 preferably fixed, that is to say permanently connected to the electrical installation to protect (Figure 6).

De façon particulièrement avantageuse, chaque boîtier 2 est alors pourvu de moyens d'embrochage / débrochage 7 (figure 2) adaptés pour permettre le raccordement électrique amovible du boîtier 2 relativement à l'embase 6. Tel que cela est représenté sur la figure 2, les moyens d'embrochage / débrochage 7 sont avantageusement formés par quatre plots 8A, 8B, 9A, 9B permettant l'enfichage du boîtier 2 sur l'embase 6. Les pôles des varistances phase-terre PT et phase-neutre PN sont ainsi avantageusement reliés respectivement aux plots 8A, 8B d'une part et 9A, 9B d'autre part.In a particularly advantageous manner, each housing 2 is then provided with racking / unplugging means 7 ( figure 2 ) adapted to allow the removable electrical connection of the housing 2 relative to the base 6. As shown on the figure 2 , the racking-in / racking-out means 7 are advantageously formed by four pads 8A, 8B, 9A, 9B allowing the casing 2 to be plugged onto the base 6. The poles of the phase-to-earth and phase-to-neutral varistors PN are thus advantageously respectively connected to the pads 8A, 8B on the one hand and 9A, 9B on the other hand.

En outre, l'embase 6 est préférentiellement pourvue d'un logement 10 agencé pour recevoir le boîtier 2, et sur le fond 10A duquel sont ménagées quatre ouvertures 8'A, 8'B, 9'A, 9'B spécifiquement adaptées pour recevoir respectivement les plots 8A, 8B, 9A, 9B.In addition, the base 6 is preferably provided with a housing 10 arranged to receive the housing 2, and on the bottom 10A of which are formed four openings 8'A, 8'B, 9'A, 9'B specifically adapted for receive respectively the pads 8A, 8B, 9A, 9B.

De façon particulièrement avantageuse, le boîtier 2 pourvu de ses moyens d'embrochage / débrochage 7 constitue une cartouche 11 interchangeable. Ainsi, lorsque l'une des varistances phase-terre PT ou phase-neutre PN est dégradée et déconnectée, l'utilisateur peut débrocher la cartouche 11 relativement à l'embase 6, en vue de la remplacer. Cette opération est rendue particulièrement facile et logique en raison de la liaison univoque existant entre la cartouche 11 et la phase à protéger.Particularly advantageously, the housing 2 provided with its racking / unplugging means 7 constitutes an interchangeable cartridge 11. Thus, when one of the phase-to-earth or phase-to-neutral varistors PN is degraded and disconnected, the user can unclip the cartridge 11 relative to the base 6, in order to replace it. This operation is made particularly easy and logical because of the unambiguous link existing between the cartridge 11 and the phase to be protected.

Plusieurs modes de réalisation de l'invention vont maintenant être décrits en se référant aux figures 4 et 5.Several embodiments of the invention will now be described with reference to Figures 4 and 5 .

Selon un premier mode de réalisation de l'invention représenté sur la figure 4, le dispositif de protection 1 est conçu pour assurer la protection d'un réseau monophasé. A cet effet, le dispositif de protection 1 comporte au moins un boîtier 2 (en pointillés sur la figure 4) pourvu d'un binôme de montage formé par une varistance phase-terre PT et une varistance phase-neutre PN, ledit binôme de montage étant raccordé électriquement à la phase L1 à protéger. Tel que cela est représenté sur la figure 4, la varistance phase-terre PT est raccordée électriquement entre la phase L1 à protéger et la terre T, assurant ainsi une protection en mode commun, et la varistance phase-neutre PN est raccordée entre la phase L1 et le point neutre N de manière à assurer une protection en mode différentiel.According to a first embodiment of the invention shown in the figure 4 , the protection device 1 is designed to provide protection for a single-phase network. For this purpose, the protection device 1 comprises at least one housing 2 (in dotted lines on the figure 4 ) provided with a mounting pair formed by a phase-to-earth varistor PT and a PN phase-neutral varistor, said pair of mounting being electrically connected to the L1 phase to be protected. As shown on the figure 4 the phase-to-earth varistor PT is electrically connected between the L1 phase to be protected and the earth T, thus providing protection in common mode, and the phase-neutral variable PN is connected between the phase L1 and the neutral point N so as to provide differential mode protection.

Selon un deuxième mode de réalisation de l'invention représenté sur la figure 5, le dispositif de protection 1 est conçu pour assurer la protection d'un réseau triphasé et comporte à cet effet au moins trois boîtiers 2A, 2B, 2C (en pointillés sur la figure 5) chacun pourvu d'un binôme de montage raccordé électriquement à l'une des phases L1, L2, L3 à protéger. Ainsi, le boîtier 2A renferme une varistance phase-terre PT raccordée entre la première phase L1 à protéger et la terre, et une varistance phase-neutre PN raccordée entre ladite phase L1 et le point neutre N.According to a second embodiment of the invention shown in the figure 5 , the protection device 1 is designed to protect a three-phase network and comprises for this purpose at least three housings 2A, 2B, 2C (dashed on the figure 5 ) each provided with a pair of mounting electrically connected to one of the phases L1, L2, L3 to be protected. Thus, the housing 2A contains a phase-to-earth varistor PT connected between the first phase L1 to be protected and earth, and a phase-to-neutral varistor PN connected between said phase L1 and the neutral point N.

De même, le boîtier 2B comporte une varistance phase-terre PT raccordée entre la deuxième phase L2 à protéger et la terre, et une varistance phase-neutre PN raccordée entre la deuxième phase L2 et le point neutre N.Similarly, the housing 2B has a phase-to-earth varistor PT connected between the second phase L2 to be protected and earth, and a phase-to-neutral varistor PN connected between the second phase L2 and the neutral point N.

Enfin, le troisième boîtier 2C comporte une varistance phase-terre PT, raccordée entre la troisième phase L3 à protéger et la terre, et une varistance phase-neutre PN raccordée entre ladite troisième phase L3 et le point neutre N.Finally, the third housing 2C comprises a phase-earth varistor PT, connected between the third phase L3 to be protected and earth, and a phase-to-neutral varistor PN connected between said third phase L3 and the neutral point N.

D'une façon générale, le dispositif de protection 1 conforme à l'invention pourra être adapté pour assurer la protection d'un réseau polyphasé comprenant un nombre N de phases. Dans ce cas, le dispositif de protection 1 comportera avantageusement un nombre de boîtiers 2 au moins égal au nombre N de phases, chaque boîtier 2 étant pourvu d'un binôme de montage 3. Dans ce cas, le dispositif de protection 1 est dit « multipolaire ».In general, the protection device 1 according to the invention may be adapted to provide protection for a polyphase network comprising a number N of phases. In this case, the protective device 1 advantageously comprises a number of housings 2 at least equal to the number N of phases, each housing 2 being provided with a mounting pair 3. In this case, the protection device 1 is called " multipolar ".

De façon préférentielle, le dispositif de protection 1 comporte, lorsqu'il est multipolaire, des moyens isolants 30, disposés entre deux binômes de montage 3 consécutifs, c'est-à-dire juxtaposés, de manière à les isoler électriquement l'un de l'autre. Les moyens isolants 30 permettent ainsi d'éviter la formation de courts-circuits susceptibles de se produire entre deux binômes de montage 3 consécutifs et rapprochés, en raison de leur raccordement à des conducteurs actifs et notamment à des phases L1, L2, L3 de potentiels différents. Grâce aux moyens isolants 30, il est possible de rapprocher les binômes de montage 3 les uns des autres, et donc de diminuer l'encombrement global du dispositif, tout en évitant la formation de courts-circuits entre deux binômes de montage 3 consécutifs.Preferably, the protection device 1 comprises, when multipole, insulating means 30, arranged between two pairs of mounting 3 consecutive, that is to say, juxtaposed, so as to electrically isolate one of the other. The insulating means 30 thus make it possible to avoid the formation of short circuits that can occur between two pairs of mounting 3 consecutive and close together, because of their connection to active conductors and especially to phases L1, L2, L3 potential different. Thanks to the insulating means 30, it is possible to bring the pairs of mounting 3 to each other, and thus reduce the overall size of the device, while avoiding the formation of short circuits between two pairs of mounting 3 consecutive.

De façon préférentielle, les moyens isolants 30 sont formés par un écran en matériau électriquement isolant, interposé entre deux binômes de montage 3 consécutifs. Les moyens isolants 30, et notamment l'écran isolant, sont avantageusement conçus et dimensionnés de manière à augmenter la distance d'isolement entre deux binômes de montage 3 consécutifs, afin d'empêcher la formation d'arcs électriques entre ces derniers tout en conservant une distance d'écartement faible, inférieure à la distance d'isolement, entre les binômes de montage 3, de manière à limiter l'encombrement du dispositif.Preferably, the insulating means 30 are formed by a screen of electrically insulating material, interposed between two pairs of mounting 3 consecutive. The insulating means 30, and in particular the insulating screen, are advantageously designed and dimensioned so as to increase the isolation distance between two consecutive assembly pairs 3, in order to prevent the formation of electric arcs between the latter while retaining a small spacing distance, less than the isolation distance, between the pairs of mounting 3, so as to limit the size of the device.

L'expression « distance d'isolement » fait référence ici à la distance minimale que doit parcourir l'arc électrique dans le milieu diélectrique gazeux, par exemple l'air, séparant les binômes de montage 3. La présence des moyens isolants 30, notamment de l'écran isolant, permet d'augmenter la distance d'isolement en obligeant l'arc électrique à les contourner.The expression " isolation distance " refers here to the minimum distance that the electric arc must travel in the gaseous dielectric medium, by example the air, separating the pairs of mounting 3. The presence of the insulating means 30, including the insulating screen, increases the isolation distance by forcing the electric arc to bypass.

Pour les réseaux dont le schéma de raccordement du neutre à la terre n'est pas du type IT (neutre isolé de la terre ou impédant), le dispositif de protection 1 pourra comporter une varistance dite neutre-terre NT, disposée entre le neutre et la terre, ladite varistance étant montée au sein d'un boîtier supplémentaire 2S, tel que cela est représenté sur les figures 4 et 5. Le boîtier supplémentaire 2S pourra soit être agencé spécifiquement pour contenir une seule varistance, soit être en tout point similaire au boîtier 2, à la différence prêt qu'il ne recevra qu'une seule varistance neutre-terre NT tel que cela est illustré sur les figures 4 et 5. Dans ce dernier cas, une partie 2V du boîtier supplémentaire 2S sera alors inutilisée.For the networks whose connection diagram of the neutral to the ground is not of the type IT (isolated neutral of the ground or impedant), the protection device 1 may comprise a so-called neutral-earthed variable NT, arranged between the neutral and the earth, said varistor being mounted within an additional housing 2S, as shown on the Figures 4 and 5 . The additional box 2S may either be specifically designed to contain a single varistor, or be similar in all respects to the case 2, with the difference that it will receive only one NT neutral-earth varistor as shown in FIGS. Figures 4 and 5 . In the latter case, a 2V part of the additional box 2S will then be unused.

Bien évidemment, pour les réseaux dont le schéma de raccordement du neutre à la terre est du type IT (neutre impédant ou isolé de la terre), il suffit de supprimer ou de retirer (dans le cas d'une version débrochable) le boîtier supplémentaire 2S, le dispositif de protection 1 ne comportant alors plus qu'un seul boîtier 2 dans le cas d'un réseau monophasé et trois boîtiers 2A, 2B, 2C dans le cas d'un réseau triphasé.Of course, for networks with a neutral earth connection scheme of type IT (impedant neutral or isolated from earth), simply remove or remove (in the case of a withdrawable version) the additional enclosure 2S, the protection device 1 then having more than one housing 2 in the case of a single-phase network and three boxes 2A, 2B, 2C in the case of a three-phase network.

Le dispositif de protection 1 conforme à l'invention présente ainsi avantageusement un encombrement réduit, avec au maximum deux boîtiers 2, 2S en monophasé et au maximum quatre boîtiers 2A, 2B, 2C, 2S en triphasé. En outre, le dispositif de protection 1 ne comportant qu'un seul boîtier 2, 2A, 2B, 2C (ou moteur) par conducteur actif, la manipulation des versions débrochables de ce dispositif est particulièrement aisée, l'utilisateur associant intuitivement une phase L1, L2 ou L3 à protéger à une unique cartouche 11 correspondante.The protection device 1 according to the invention thus advantageously has a small footprint, with a maximum of two boxes 2, 2S in single phase and at most four housings 2A, 2B, 2C, 2S three-phase. In addition, the protection device 1 having only one housing 2, 2A, 2B, 2C (or motor) per active conductor, the manipulation of withdrawable versions of this device is particularly easy, the user intuitively combining an L1 phase , L2 or L3 to be protected to a single corresponding cartridge 11.

Cet aspect de l'invention s'avère particulièrement intéressant dans le cas de réseaux polyphasés comprenant un nombre important de conducteurs actifs. Ainsi, plus le nombre de conducteurs actifs est élevé, et plus le dispositif de protection 1 conforme à l'invention est avantageux en regard des dispositifs de l'art antérieur en matière d'encombrement et de facilité d'utilisation.This aspect of the invention is particularly interesting in the case of polyphase networks comprising a large number of active conductors. Thus, the greater the number of active conductors is high, and the protection device 1 according to the invention is advantageous compared to the devices of the prior art in terms of size and ease of use.

Dans les cas où le dispositif de protection 1 comporte plusieurs cartouches 11 interchangeables, chaque cartouche 11 étant associée soit à une phase L1, L2 ou L3 à protéger soit au point neutre N, l'embase 6 (représentée en pointillés sur les figures 4 et 5) peut comporter plusieurs logements, chaque logement étant susceptible de recevoir une cartouche 11, ou encore un unique logement aménagé pour recevoir toutes les cartouches 11 sus-mentionnées.In cases where the protection device 1 comprises several interchangeable cartridges 11, each cartridge 11 being associated with either a phase L1, L2 or L3 to be protected or at the neutral point N, the base 6 (shown in dotted lines on the Figures 4 and 5 ) may have several housings, each housing being capable of receiving a cartridge 11, or a single housing arranged to receive all the cartridges 11 above-mentioned.

Tel que cela est représenté sur les figures 4 et 5, chaque varistance phase-terre PT, phase-neutre PN ou encore neutre-terre NT est raccordée au réseau à l'aide de moyens de connexion électrique 15, la liaison électrique à la terre étant effectuée à l'aide d'autres moyens de connexion électrique 16. Les moyens de connexion électrique 15, 16 sont, de façon préférentielle et classique, de nature filaire.As shown on the Figures 4 and 5 each phase-to-earth PV, phase-neutral PN or earth-neutral NT is connected to the network by means of electrical connection means 15, the electrical connection to earth being made using other means of electrical connection 16. The electrical connection means 15, 16 are, preferably and conventional, of wired nature.

Avantageusement, chaque varistance phase-terre PT comprend une borne dite de phase p reliée électriquement à la phase L1, L2 ou L3 à protéger, et une borne dite de terre t, reliée électriquement à la terre T.Advantageously, each phase-earth varistor PT comprises a so-called phase terminal p electrically connected to the phase L1, L2 or L3 to be protected, and a so-called earth terminal t, electrically connected to the earth T.

De même, chaque varistance phase-neutre PN comprend une borne dite de phase p reliée électriquement à la phase L1, L2 ou L3 à protéger et une borne dite de neutre n reliée électriquement au neutre N. Tel que cela est représenté sur les figures 4 et 5, les varistances phase-terre PT et phase-neutre PN sont disposées l'une à côté de l'autre au sein du boîtier 2, 2A, 2B, 2C. Or, les bornes de neutre n et de terre t ne sont pas au même potentiel de telle sorte que si ces dernières sont trop proches l'une de l'autre, un arc électrique est susceptible de se former entre lesdites bornes n, t, court-circuitant ainsi le dispositif de protection 1.Similarly, each PN phase-neutral varistor comprises a so-called phase terminal p electrically connected to the phase L1, L2 or L3 to be protected and a so-called neutral terminal n electrically connected to the neutral N. As shown in FIG. Figures 4 and 5 the phase-to-earth and phase-to-neutral varistors PN are arranged next to each other within the housing 2, 2A, 2B, 2C. However, the neutral n and earth terminals t are not at the same potential so that if the latter are too close to each other, an electric arc is likely to be formed between said terminals n, t, thus bypassing the protection device 1.

Afin d'éviter ce phénomène, le dispositif de protection 1 comporte avantageusement des moyens d'isolation électrique 20, adaptés pour isoler électriquement la borne de terre t de la borne de neutre n et de préférence aménagés au sein du boîtier 2, 2A, 2B, 2C. Les moyens d'isolation électrique 20 sont avantageusement disposés et agencés pour former un écran isolant entre ladite borne de terre t et ladite borne de neutre n.In order to avoid this phenomenon, the protection device 1 advantageously comprises electrical insulation means 20, adapted to electrically isolate the earth terminal t from the neutral terminal n and preferably arranged within the housing 2, 2A, 2B , 2C. The electrical insulation means 20 are advantageously arranged and arranged to form an insulating screen between said earth terminal t and said neutral terminal n.

A titre d'exemple illustratif et non limitatif, les moyens d'isolation électrique 20 pourront être formés par une cloison de séparation 21 électriquement isolante, interposée entre la borne de terre t et la borne de neutre n de manière à garantir l'isolation électrique desdites bornes de terre t et de neutre n l'une par rapport à l'autre.By way of illustrative and nonlimiting example, the electrical insulation means 20 may be formed by an electrically insulating separating partition 21 interposed between the earth terminal t and the neutral terminal n so as to guarantee the electrical insulation said earth terminals t and neutral n relative to one another.

Avantageusement, les moyens d'isolation électrique 20 sont conçus et dimensionnés pour augmenter la distance d'isolement entre la borne de terre t et la borne de neutre n, de telle sorte que la distance d'isolement soit supérieure à la distance d'écartement réelle séparant lesdites bornes de terre t et de neutre n.Advantageously, the electrical insulation means 20 are designed and dimensioned to increase the isolation distance between the earth terminal t and the neutral terminal n, so that the isolation distance is greater than the spacing distance. actual separating said earth terminals t and neutral n.

Les moyens d'isolation électrique 20 permettent ainsi de raccourcir la distance d'écartement entre les bornes de neutre n et de terre t, diminuant ainsi l'encombrement du dispositif, tout en garantissant leur isolation électrique, et ce en augmentant la distance d'isolement entre les bornes de neutre n et de terre t, c'est-à-dire la longueur du chemin à parcourir par l'arc électrique entre lesdites bornes neutre n et de terre t pour contourner les moyens d'isolation électrique 20.The electrical insulation means 20 thus make it possible to shorten the spacing distance between the neutral n and earth terminals t, thus reducing the size of the device, while guaranteeing their electrical insulation, and this by increasing the distance of isolation between the neutral n and earth terminals t, that is to say the length of the path to be traveled by the electric arc between said neutral terminals n and earth t to bypass the electrical insulation means 20.

La cloison de séparation 21 pourra par exemple s'étendre sur une surface juste suffisante pour assurer l'isolation entre les bornes de terre t et de neutre n.The partition wall 21 may for example extend over a surface just sufficient to provide isolation between earth terminals t and neutral n.

De façon préférentielle, et tel que cela est représenté sur la figure 1, la cloison de séparation 21 sera préférentiellement disposée à l'intérieur du boîtier 2 de manière à séparer ce dernier en deux logements 22, 23 sensiblement symétriques par rapport à la cloison de séparation 21, chaque logement 22, 23 étant susceptible de recevoir une varistance munie de son moyen de déconnexion. De façon encore plus préférentielle, et tel que cela est représenté sur les figures 1 et 2, la cloison de séparation 21 pourra s'étendre à l'extérieur du boîtier 2, de manière à séparer la paire de plots 8A, 8B associée à la varistance phase-terre PT, de la paire de plots 9A, 9B associée à la varistance phase-neutre PN.Preferably, and as shown on the figure 1 , the partition wall 21 will preferably be disposed inside the housing 2 so as to separate the latter into two housings 22, 23 substantially symmetrical with respect to the partition wall 21, each housing 22, 23 being capable of receiving a varistor equipped with its means of disconnection. Even more preferentially, and as represented on the Figures 1 and 2 the partition wall 21 may extend outside the housing 2, so as to separate the pair of pads 8A, 8B associated with the phase-earth varistor PT, of the pair of pads 9A, 9B associated with the varistor phase-neutral PN.

Dans ce cas, l'embase 6 comportera avantageusement un logement central 60, spécifiquement adapté pour recevoir l'extrémité sortante de la cloison de séparation 21 lors de l'embrochage du boîtier 2 sur l'embase 6.In this case, the base 6 advantageously comprises a central housing 60, specifically adapted to receive the outgoing end of the partition wall 21 during the racking of the housing 2 on the base 6.

Une telle configuration permet notamment d'éviter la formation d'arcs électriques entre les plots 8A, 9A de potentiels différents, raccordés respectivement à la borne de terre t et à la borne de neutre n lors de l'enfichage.Such a configuration makes it possible in particular to avoid arcing between the pads 8A, 9A of different potentials, respectively connected to the earth terminal t and the neutral terminal n during plugging.

Selon une variante préférentielle de l'invention, les varistances phase-terre PT et phase-neutre PN d'un même binôme de montage 3 ont des tensions de service différentes l'une de l'autre. Avantageusement, la varistance phase-neutre PN possède une tension de service inférieure à celle de la varistance phase-terre PT, ce qui permet d'une part d'abaisser le niveau de protection du parafoudre, et d'autre part de réduire l'encombrement du binôme électrique. Ainsi, à titre d'exemple illustratif et non limitatif, la varistance phase-terre PT pourra avoir une tension de service de l'ordre de 440 volts de manière à supporter la tension entre phases (de l'ordre de 400 volts) comme l'exigent les normes françaises, la varistance phase-neutre PN présentant une tension de service plus faible, de l'ordre de 275 volts. Dans le cas des versions débrochables du dispositif de protection 1, chaque cartouche 11 comportera ainsi avantageusement un couple de varistances de valeurs différentes, et ce sans créer aucune confusion dans l'esprit de l'utilisateur, puisque chaque conducteur actif reste associé à une unique cartouche 11.According to a preferred variant of the invention, the phase-to-earth and phase-to-neutral varistors PN of the same assembly pair 3 have different operating voltages from one another. Advantageously, the PN phase-neutral varistor has a lower operating voltage than the PT phase-earth varistor, which allows on the one hand to lower the protection level of the arrester, and on the other hand to reduce the clutter of the electrical pair. Thus, as an illustrative example and non-limiting, the phase-earth varistor PT may have a service voltage of the order of 440 volts so as to withstand the voltage between phases (of the order of 400 volts) as required by French standards, the phase varistor -Neutre PN having a lower operating voltage, of the order of 275 volts. In the case of withdrawable versions of the protection device 1, each cartridge 11 will thus advantageously comprise a pair of varistors of different values, and this without creating any confusion in the mind of the user, since each active conductor remains associated with a single cartridge 11.

L'invention concerne également un procédé de fabrication d'un dispositif de protection 1 contre les surtensions adapté pour assurer une protection suivant les modes commun et différentiel, ledit procédé comportant les étapes consistant à :

  • a) fabriquer au moins un boîtier 2 électriquement isolant,
  • b) fabriquer au moins un binôme électrique, formé par une varistance dite phase-terre PT destinée à être disposée entre une première phase L1 à protéger et la terre T et une varistance dite phase-neutre PN destinée à être disposée entre ladite première phase L1 à protéger et le neutre N.
The invention also relates to a method of manufacturing a protection device 1 against overvoltages adapted to provide a protection according to the common and differential modes, said method comprising the steps of:
  • a) fabricating at least one electrically insulating casing 2,
  • b) manufacture at least one electrical pair, formed by a so-called phase-to-earth varistor PT intended to be arranged between a first phase L1 to be protected and earth T and a so-called phase-neutral varistor PN intended to be arranged between said first phase L1 to protect and the neutral N.

Selon l'invention, le procédé comporte également les étapes suivantes :

  • c) aménager spécifiquement le boîtier 2 pour qu'il puisse recevoir le binôme électrique,
  • d) associer les deux varistances PT, PN en un binôme de montage 3 et les monter l'une à côté de l'autre au sein du boîtier 2.
    Avantageusement, le procédé comporte également une étape dans laquelle on pourvoit le boîtier 2 de moyens d'embrochage / débrochage 7 permettant de raccorder ledit boîtier 2 de manière amovible sur une embase 6 fixe.
According to the invention, the method also comprises the following steps:
  • c) specifically arrange the housing 2 so that it can receive the electrical pair,
  • d) associate the two varistors PT, PN in a pair of mounting 3 and mount them next to each other within the housing 2.
    Advantageously, the method also comprises a step in which the housing 2 is provided with racking / unplugging means 7 for connecting said housing 2 removably to a fixed base 6.

De façon particulièrement avantageuse, la varistance phase-terre PT comprenant une borne de phase p reliée électriquement à la phase L1, L2 ou L3 à protéger et une borne dite de terre t, reliée électriquement à la terre T, et la varistance phase-neutre PN comprenant une borne dite de phase p, reliée électriquement à ladite phase L1, L2 ou L3 à protéger et une borne dite de neutre n, reliée électriquement au neutre, le procédé comporte également une étape dans laquelle on dispose des moyens d'isolation électrique 20 entre la borne de terre t et la borne de neutre n.Particularly advantageously, the phase-to-earth varistor PT comprising a phase terminal p electrically connected to the phase L1, L2 or L3 to be protected and a so-called earth terminal t, electrically connected to earth T, and the phase-neutral varistor PN comprising a so-called phase terminal p, electrically connected to said phase L1, L2 or L3 to be protected and a so-called neutral terminal n, electrically connected to the neutral, the method also comprises a step in which electrical isolation means are available 20 between the earth terminal t and the neutral terminal n.

Le procédé comporte également avantageusement les étapes suivantes :

  • e) fabriquer une varistance dite neutre-terre NT destinée à être disposée entre le neutre N et la terre T,
  • f) monter ladite varistance neutre-terre NT au sein d'un boîtier supplémentaire 2S, de préférence débrochable.
The method also advantageously comprises the following steps:
  • e) fabricating a so-called neutral-earth NT varistor intended to be arranged between the neutral N and the earth T,
  • f) mounting said neutral-earth varistor NT in an additional housing 2S, preferably withdrawable.

L'invention permet ainsi de réduire de façon significative les dimensions et donc l'encombrement d'un dispositif de protection 1 de type mode commun / mode différentiel, tout en garantissant l'isolation électrique entre les composants du dispositif présentant des potentiels différents.The invention thus makes it possible to significantly reduce the dimensions and therefore the size of a protection device 1 of the common mode / differential mode mode, while ensuring the electrical insulation between the components of the device having different potentials.

Un autre avantage de l'invention est de permettre un débrochage facile et intuitif des composants de protection hors d'usage, en vue de leur remplacement.Another advantage of the invention is to allow easy and intuitive removal of the worn out protection components, with a view to their replacement.

Un autre avantage du dispositif de protection 1 conforme à l'invention est qu'il est utilisable quel que soit le schéma de raccordement du neutre à la terre.Another advantage of the protection device 1 according to the invention is that it can be used regardless of the connection diagram of the neutral to earth.

Un autre avantage de l'invention provient du fait que le dispositif de protection 1 conforme à l'invention nécessite un nombre de pièces, et notamment de moteurs, réduit par rapport aux dispositifs de l'art antérieur, tout en assurant les mêmes fonctions. La solution offerte par l'invention est donc plus économique que les solutions existantes.Another advantage of the invention stems from the fact that the protection device 1 according to the invention requires a number of parts, including engines, reduced compared to the devices of the prior art, while providing the same functions. The solution offered by the invention is therefore more economical than existing solutions.

Un autre avantage de l'invention est qu'elle permet de rationaliser le procédé de fabrication du dispositif de protection 1 conforme à l'invention, notamment en ayant systématiquement recours à des moteurs doubles.Another advantage of the invention is that it makes it possible to rationalize the method of manufacturing the protection device 1 according to the invention, in particular by systematically resorting to double motors.

POSSIBILITE D'APPLICATION INDUSTRIELLEPOSSIBILITY OF INDUSTRIAL APPLICATION

L'invention trouve son application industrielle dans la conception et la fabrication de dispositifs de protection contre les surtensions transitoires.The invention finds its industrial application in the design and manufacture of transient overvoltage protection devices.

Claims (15)

  1. Protection device (1) against overvoltages adapted to provide protection in common mode and differential mode, and comprising at least one electrically insulating housing (2), specifically adapted to receive at least one electrical couple formed by a varistor referred to as phase to ground (PT) with a phase terminal (p) and a ground terminal (t) arranged between a first phase (L1) to be protected and ground (T), and a varistor referred to as phase to neutral (PN ) with a phase terminal (p) and a neutral terminal (n) disposed between said first phase (L1) to be protected and the neutral (N), said phase to ground (PT) and phase to neutral (PN) varistors being mounted one beside the other within said housing (2) so as to form a mounted couple (3) and the protective device (1) having electrical insulation means (20), adapted to electrically isolate the ground terminal (t) from the phase to ground (PT) varistor of the neutral terminal (n) from the phase to neutral (PN) varistor, characterized in that the electrical insulation means (20) are designed and dimensioned so that the isolation distance between said ground terminal (t) and said neutral terminal (n) is greater than the actual spacing distance separating said ground (t) and neutral (n) terminals.
  2. Device according to claim 1 wherein the electrical insulation means (20) are formed by an electrically insulating separation wall (21), interposed between the ground terminal (t) and the neutral terminal (n) so to ensure electrical insulation of said ground terminals (t) and neutral (n) relative to the other.
  3. Device according to claim 2 wherein the separation wall (21) is arranged inside the housing (2), so as to separate it into two housings (22, 23) each capable of receiving one varistor.
  4. Device according to one of claims 1 to 3 comprising at least one fixed base (6), and in that each housing (2) is provided with pin/unpin means (7) formed by studs (8A , 8B, 9A, 9B), adapted to allow releasable electrical connection of said housing (2) relative to said base (6).
  5. Device according to claim 4 wherein the housing (2) provided with its pin/unpin means (7) constitutes an interchangeable cartridge (11).
  6. Device according to Claims 3 and 4 wherein the separation wall (21) extends outside the housing (2) so as to separate the pair of studs (8A, 8B) associated with the phase to ground varistor (PT) from the pair of studs (9A, 9B) associated with the phase-neutral varistor (PN).
  7. Device according to claim 6 wherein the base (6) includes a central housing (60) adapted to receive the outward end of the separation wall (21).
  8. Device according to one of claims 1 to 7 which is designed to ensure the protection of a single phase network and in that it comprises at least one housing (2) provided with a mounted couple (3) electrically connected to the phase (L1) to be protected.
  9. Device according to one of claims 1 to 8 which is designed to protect a three-phase network and in that it comprises at least three housings (2A, 2B, 2C), each provided with a mounted couple (3) electrically connected to a phase (L1, L2, L3) to be protected.
  10. Device according to one of claims 1 to 8 which is designed to ensure the protection of a multi-phase network comprising a number N of phases, and in that it comprises a number of housings (2) at least equal to the number N of phases, each housing (2) being provided with a mounted couple (3).
  11. Device according to claim 9 or 10 including insulating means (30) arranged between two consecutive mounted couples (3) in order to electrically isolate them from each other.
  12. Device according to claim 11 wherein the insulating means (30) are formed by a screen of electrically insulating material, interposed between two consecutive mounted couples (3).
  13. Device according to one of claims 1 to 12 further comprising a varistor-referred to as neutral to ground (NT), disposed between neutral (N) and ground (T), said neutral to ground (NT) varistor being mounted inside an additional housing (2S).
  14. Device according to one of the preceding claims wherein the phase to ground (PT) and phase to neutral (PN) varistors of the same mounted couple (3) have different operating voltages from each other.
  15. Device according to claim 14 wherein, in one mounted couple (3), the phase to neutral (PN) varistor has a lower operating voltage to that of the phase to ground varistor (PT).
EP05736977A 2004-03-05 2005-03-04 Overvoltage protection device in common/differential mode of reduced size Not-in-force EP1726019B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0402367A FR2867318B1 (en) 2004-03-05 2004-03-05 DEVICE FOR PROTECTING AGAINST DIFFERENTIAL COMMON MODE OVERTENTIONS OF REDUCED DIMENSION
PCT/FR2005/000524 WO2005086182A1 (en) 2004-03-05 2005-03-04 Overvoltage protection device in common/differential mode of reduced size

Publications (2)

Publication Number Publication Date
EP1726019A1 EP1726019A1 (en) 2006-11-29
EP1726019B1 true EP1726019B1 (en) 2012-08-15

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Application Number Title Priority Date Filing Date
EP05736977A Not-in-force EP1726019B1 (en) 2004-03-05 2005-03-04 Overvoltage protection device in common/differential mode of reduced size

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EP (1) EP1726019B1 (en)
CN (1) CN1930642A (en)
BR (1) BRPI0509002A (en)
FR (1) FR2867318B1 (en)
MX (1) MXPA06010057A (en)
RU (1) RU2006135132A (en)
WO (1) WO2005086182A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3908889A1 (en) * 2019-01-11 2021-11-17 SHPI GmbH Universal multifunctional device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2761543B1 (en) * 1997-03-25 1999-06-04 Citel PROTECTION DEVICE FOR A LOW-VOLTAGE ELECTRIC CIRCUIT, MODULE FOR SUCH A PROTECTION DEVICE, AND CIRCUIT FOR THE MODULE
FR2783365B1 (en) * 1998-09-15 2000-12-01 Soule Materiel Electr DEVICE FOR PROTECTING ELECTRICAL INSTALLATIONS AGAINST INTERFERENCE WITH THE POWER SUPPLY

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MXPA06010057A (en) 2006-12-15
FR2867318B1 (en) 2007-05-11
RU2006135132A (en) 2008-04-10
BRPI0509002A (en) 2007-08-07
EP1726019A1 (en) 2006-11-29
FR2867318A1 (en) 2005-09-09
CN1930642A (en) 2007-03-14
WO2005086182A1 (en) 2005-09-15

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