FR2826201A1 - Electrical distribution network overvoltage prevention having varistance/resistance series placed between input/output differential circuit breaker conducting default current when overvoltage appears with resistor limiting current. - Google Patents

Electrical distribution network overvoltage prevention having varistance/resistance series placed between input/output differential circuit breaker conducting default current when overvoltage appears with resistor limiting current. Download PDF

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Publication number
FR2826201A1
FR2826201A1 FR0108143A FR0108143A FR2826201A1 FR 2826201 A1 FR2826201 A1 FR 2826201A1 FR 0108143 A FR0108143 A FR 0108143A FR 0108143 A FR0108143 A FR 0108143A FR 2826201 A1 FR2826201 A1 FR 2826201A1
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Prior art keywords
varistor
differential
series
resistor
overvoltage
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FR0108143A
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French (fr)
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Bruno Joel Jose Decle
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E RE K
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E RE K
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Priority to FR0108143A priority Critical patent/FR2826201A1/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/334—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means to produce an artificial unbalance for other protection or monitoring reasons or remote control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The overvoltage removal mechanism has a varistance (1) in series with a resistance (9) and connected between an input wire (A0) and an output wire (B2) of a differential circuit breaker (2). When an overvoltage appears the varistance conducts the default current. The resistance limits the current flow.

Description

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La présente invention concerne un dispositif qui stoppe les surtensions électriques qui pourraient survenir sur les réseaux de distribution électrique, à vide comme en charge.  The present invention relates to a device which stops electrical overvoltages which could occur on electrical distribution networks, both empty and under load.

Les surtensions électriques sont assez courantes et posent un réel problème pour l'exploitant des réseaux ainsi que pour l'utilisateur lorsque, par exemple, la rupture d'un neutre commun, l'inversion phase/neutre (tension simple) avec une distribution phase/phase (tension composée) occasionnent des surtensions.  Electrical overvoltages are quite common and pose a real problem for the network operator as well as for the user when, for example, the breaking of a common neutral, the phase / neutral inversion (single voltage) with a phase distribution / phase (compound voltage) cause overvoltages.

L'invention est caractérisée par un branchement particulier (fig. 1) d'une varistance (1) en série avec une résistance (9), sur un système de coupure différentiel (2). Le branchement consiste à raccorder la varistance (1) associée à la résistance (9) entre la borne (AO) (sortie du contact d'entrée du système différentiel) et une borne de sortie (B2) de l'appareil de coupure différentiel (2) (fig. 1).  The invention is characterized by a particular connection (fig. 1) of a varistor (1) in series with a resistor (9), on a differential breaking system (2). The connection consists in connecting the varistor (1) associated with the resistor (9) between the terminal (AO) (output of the input contact of the differential system) and an output terminal (B2) of the differential breaking device ( 2) (fig. 1).

Il existe un brevet espagnol"EP0373676A2"datant de 1989 dans lequel il est utilisé le différentiel du système de coupure différentiel comprenant un composant dont l'impédence chute à partir d'une tension donnée, connecté entre une borne d'entrée et une borne de sortie différente. A la première utilisation en surtension ce système ne fonctionne pas car il est détruit (et peut à son tour détruire son environnement ou occasionner des projections de pièces incandescentes ou encore générer un incendie). En effet, le système met le composant en court-circuit direct entre la borne d'entrée et de sortie dès qu'une surtension apparaît car le courant qui circule dans ce composant n'est pas limité. De plus, ce composant reste au potentiel de la borne d'entrée même si l'on déclenche volontairement le système de coupure différentiel, ce qui pose un problème de sécurité en cas de contact de l'utilisateur avec ce composant.  There is a Spanish patent "EP0373676A2" dating from 1989 in which the differential of the differential cut-off system is used, comprising a component whose impedence drops from a given voltage, connected between an input terminal and a terminal. different output. At the first use in overvoltage this system does not work because it is destroyed (and can in turn destroy its environment or cause projections of glowing parts or even generate a fire). Indeed, the system puts the component in direct short circuit between the input and output terminal as soon as an overvoltage appears because the current which circulates in this component is not limited. In addition, this component remains at the potential of the input terminal even if the differential cut-off system is voluntarily triggered, which poses a safety problem in the event of user contact with this component.

L'un des objets de l'invention est de pallier aux problèmes posés par l'état de la technique.  One of the objects of the invention is to alleviate the problems posed by the state of the art.

Lorsqu'une surtension apparaît, supérieure à la tension de court circuit de la varistance (1), elle devient passante,  When an overvoltage appears, greater than the short circuit voltage of the varistor (1), it becomes conducting,

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créant un courant de défaut pour le différentiel limité par la résistance (9), déclenchant ce dernier.  creating a fault current for the differential limited by the resistor (9), triggering the latter.

En rupture de neutre commun, le courant qui passe dans la varistance est limité par la résistance interne des récepteurs qui fait la liaison entre les phases. En associant à la varistance une résistance, les résistances internes des récepteurs ne sont plus indispensables pour limiter le courant dans la varistance. On peut donc soumettre le système à une tension composée (branchement entre phases) ou toute autre surtension sans risquer un court circuit direct de la varistance. Le courant de déclenchement du différentiel étant faible, l'intensité de défaut créée n'atteint pas une forte valeur et n'occasionne pas de perturbations annexes ni de destruction de la varistance.  In rupture of common neutral, the current which passes in the varistor is limited by the internal resistance of the receivers which makes the connection between the phases. By associating a resistance with the varistor, the internal resistances of the receivers are no longer essential to limit the current in the varistor. It is therefore possible to subject the system to a composite voltage (connection between phases) or any other overvoltage without risking a direct short circuit of the varistor. The tripping current of the differential being low, the fault intensity created does not reach a high value and does not cause additional disturbances or destruction of the varistor.

Cela permet à l'invention de fonctionner plusieurs fois, l'utilisateur n'ayant qu'à réarmer le système, ce qui n'est pas le cas si l'on ne met pas en série la résistance (ou tout composant possédant une résistance interne fixe) et la varistance (ou tout autre composant dont la résistance interne chute à partir d'une tension donnée-tension de court-circuit-) car le système serait en court-circuit direct et entraînerait la destruction de celui-ci. This allows the invention to operate several times, the user only having to rearm the system, which is not the case if one does not put the resistance in series (or any component having a resistance fixed internal) and the varistor (or any other component whose internal resistance drops from a given voltage-short-circuit voltage-) because the system would be in direct short-circuit and would destroy it.

Les caractéristiques de la varistance et de la résistance choisies, déterminent la valeur maximale de surtension acceptable en fonction des contraintes d'exploitation et d'utilisation. Le système décrit ci-dessus réalise la protection d'un départ bipolaire monophasé. Une modification associant trois varistances (1), (5), (6) en série chacune avec une résistance (10), (11) et (12) sur un système différentiel tétrapolaire (7) assurerait la protection d'un départ triphasé avec neutre (fig. 2).  The characteristics of the varistor and of the resistance chosen determine the maximum acceptable overvoltage value according to the constraints of operation and use. The system described above provides protection for a single-phase bipolar feeder. A modification associating three varistors (1), (5), (6) in series each with a resistor (10), (11) and (12) on a four-pole differential system (7) would ensure the protection of a three-phase feeder with neutral (fig. 2).

Le système de coupure différentiel serait soit un disjoncteur différentiel, soit un interrupteur différentiel, ou tout autre ensemble de coupure à base de déclenchement différentiel.  The differential cut-out system would be either a differential circuit breaker, a differential switch, or any other set of cut-offs based on differential tripping.

Pour l'application de l'invention sur les installations existantes, le câblage de la (ou des) varistance (s) en série avec une résistance au système de coupure en fils isolés et son introduction dans les évidements est possible.  For the application of the invention on existing installations, the wiring of the varistor (s) in series with a resistance to the cut-off system in insulated wires and its introduction into the recesses is possible.

<Desc/Clms Page number 3> <Desc / Clms Page number 3>

Le montage de la (ou des) varistance (s) en série avec une résistance dans un boîtier modulaire isolé, à côté du système de coupure différentiel et un câblage extérieur est lui aussi possible.  The mounting of the varistor (s) in series with a resistor in an insulated modular box, next to the differential switching system and external wiring is also possible.

Pour des générations futures, le câblage de la (ou des) varistance (s) en série avec une résistance, serai (en) t intégrée (s) (fig. 3) et (fig. 4) à l'appareil de coupure différentiel.  For future generations, the wiring of the varistor (s) in series with a resistor, will be integrated (fig. 3) and (fig. 4) into the differential switching device. .

La (ou les) varistance (s) en série avec une résistance peu (ven) t être débrochable (s), permettant une modularité dans la fonction de protection ainsi qu'une maintenance aisée (fig. 3) et (fig. 4).  The varistor (s) in series with a resistor can be withdrawable, allowing modularity in the protection function as well as easy maintenance (fig. 3) and (fig. 4) .

Les dessins annexés illustrent l'invention : Les figures 1 et 2 représentent le système à ajouter aux systèmes de coupure différentiels actuellement en place sur les réseaux.  The accompanying drawings illustrate the invention: FIGS. 1 and 2 represent the system to be added to the differential breaking systems currently in place on the networks.

Afin d'assurer la fonction d'isolation de l'utilisateur par rapport à la source après le déclenchement du système de coupure différentiel, la connexion d'entrée AO (fig. l), (fig. 2), (fig. 3) et (fig. 4) est prise derrière le point d'ouverture de la borne d'entrée et le différentiel. Les (fig. 3) et (fig. 4) sont modulaires. In order to ensure the isolation function of the user from the source after the tripping of the differential shutdown system, the AO input connection (fig. L), (fig. 2), (fig. 3) and (fig. 4) is taken behind the opening point of the input terminal and the differential. The (fig. 3) and (fig. 4) are modular.

Claims (8)

REVENDICATIONS 1) Dispositif pour éliminer une surtension, caractérisé en ce qu'il comprend une varistance (1) branchée en série avec une résistance (9) entre une borne d'entrée (AO) et une borne de sortie (B2) d'un appareil de coupure différentiel (2). Lorsqu'une surtension apparaît, supérieure à la tension de court circuit de la varistance (1), celle-ci conduit, créant un courant de défaut pour le différentiel, déclenchant ce dernier. La résistance (9) en série avec la varistance (1), limite le courant dans la varistance (ou tout autre composant dont la résistance interne chute à partir d'une tension donnée). 1) Device for eliminating an overvoltage, characterized in that it comprises a varistor (1) connected in series with a resistor (9) between an input terminal (AO) and an output terminal (B2) of a device differential shutdown (2). When an overvoltage appears, greater than the short circuit voltage of the varistor (1), the latter conducts, creating a fault current for the differential, triggering the latter. The resistor (9) in series with the varistor (1) limits the current in the varistor (or any other component whose internal resistance drops from a given voltage). 2) Dispositif pour éliminer des surtensions, caractérisé par l'association de 3 varistances (1), (5), (6) (fig. 2) en série avec une résistance (10), (11), (12) sur un système de coupure tétrapolaire (7) (fig. 2). Le branchement consiste à raccorder les varistances (1), (5), (6) en série avec une résistance entre la borne d'entrée (AO) correspondant au neutre et les trois bornes de sortie (B2) (C2), (D2) de l'appareil de coupure différentiel (7) (fig. 2). Lorsqu'une surtension apparaît, supérieure à la tension de court circuit de la varistance (1), (5) ou (6) celle-ci devient passante, créant un courant de défaut pour le différentiel, limité par la résistance, déclenchant ce dernier.  2) Device for eliminating overvoltages, characterized by the association of 3 varistors (1), (5), (6) (fig. 2) in series with a resistor (10), (11), (12) on a four-pole cut-off system (7) (fig. 2). The connection consists in connecting the varistors (1), (5), (6) in series with a resistor between the input terminal (AO) corresponding to the neutral and the three output terminals (B2) (C2), (D2 ) of the differential switching device (7) (fig. 2). When an overvoltage appears, greater than the short circuit voltage of the varistor (1), (5) or (6) it becomes on, creating a fault current for the differential, limited by the resistance, triggering the latter . 3) Dispositif selon les revendications (1) et/ou (2) caractérisé par le fait que le point de connexion de la borne d'entrée (AO) de la varistance en série avec une résistance soit pris derrière le point d'ouverture de la borne d'entrée et le différentiel (fig. l), (fig. 2), (fig. 3) et (fig. 4).  3) Device according to claims (1) and / or (2) characterized in that the connection point of the input terminal (AO) of the varistor in series with a resistance is taken behind the opening point of the input terminal and the differential (fig. l), (fig. 2), (fig. 3) and (fig. 4). 4) Dispositif selon les revendications (1), (2) et/ou (3) caractérisé en ce que l'appareil de coupure est un disjoncteur différentiel.  4) Device according to claims (1), (2) and / or (3) characterized in that the breaking device is a differential circuit breaker. 5) Dispositif selon les revendications (1), (2) et/ou (3) caractérisé en ce que l'appareil de coupure est un interrupteur différentiel.  5) Device according to claims (1), (2) and / or (3) characterized in that the switching device is a differential switch. 6) Dispositif selon les revendications (1), (2), (3), (4) et/ou (5) caractérisé en ce que la varistance en série avec une résistance et le câblage soient introduits dans les évidements du système de coupure différentiel ou que la (ou les) varistance (s)  6) Device according to claims (1), (2), (3), (4) and / or (5) characterized in that the varistor in series with a resistor and the wiring are introduced into the recesses of the breaking system differential or that the varistor (s) <Desc/Clms Page number 5><Desc / Clms Page number 5> en série avec une résistance soi (en) t placée (s) dans un boîtier modulaire isolé.  in series with a resistor placed in an insulated modular housing. 7) Dispositif selon les revendications (1), (2), (3), (4), (5) et/ou (6) incluant une varistance et une résistance dont les caractéristiques sont choisies en fonction des contraintes d'exploitation et d'utilisation.  7) Device according to claims (1), (2), (3), (4), (5) and / or (6) including a varistor and a resistor whose characteristics are chosen according to the operating constraints and use. 8) Dispositif selon les revendications (1), (2), (3), (4), (5), (6), et/ou (7) caractérisé par le fait que les varistances en série avec une résistance soient débrochables, permettant une modularité dans la fonction de protection ainsi qu'une maintenance aisée (fig. 3) et (fig. 4). 8) Device according to claims (1), (2), (3), (4), (5), (6), and / or (7) characterized in that the varistors in series with a resistance are withdrawable , allowing modularity in the protection function as well as easy maintenance (fig. 3) and (fig. 4).
FR0108143A 2001-06-16 2001-06-16 Electrical distribution network overvoltage prevention having varistance/resistance series placed between input/output differential circuit breaker conducting default current when overvoltage appears with resistor limiting current. Withdrawn FR2826201A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0108143A FR2826201A1 (en) 2001-06-16 2001-06-16 Electrical distribution network overvoltage prevention having varistance/resistance series placed between input/output differential circuit breaker conducting default current when overvoltage appears with resistor limiting current.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0108143A FR2826201A1 (en) 2001-06-16 2001-06-16 Electrical distribution network overvoltage prevention having varistance/resistance series placed between input/output differential circuit breaker conducting default current when overvoltage appears with resistor limiting current.

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FR2826201A1 true FR2826201A1 (en) 2002-12-20

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FR0108143A Withdrawn FR2826201A1 (en) 2001-06-16 2001-06-16 Electrical distribution network overvoltage prevention having varistance/resistance series placed between input/output differential circuit breaker conducting default current when overvoltage appears with resistor limiting current.

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373676A2 (en) * 1988-12-16 1990-06-20 Alternet, S.A. Protection apparatus against electrical overvoltages
DE19534273A1 (en) * 1995-09-15 1997-03-20 Schupa Elektro Gmbh & Co Kg Protection device for surge arresters
US5737167A (en) * 1994-01-24 1998-04-07 Eh Schrack Energietechnik Gmbh Residual current safety switch
DE19919292A1 (en) * 1999-04-28 2000-11-02 Prodex Technologie Gmbh Mobile protection device with current measuring equipment to record current on the ground wire and switch off the current

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0373676A2 (en) * 1988-12-16 1990-06-20 Alternet, S.A. Protection apparatus against electrical overvoltages
US5737167A (en) * 1994-01-24 1998-04-07 Eh Schrack Energietechnik Gmbh Residual current safety switch
DE19534273A1 (en) * 1995-09-15 1997-03-20 Schupa Elektro Gmbh & Co Kg Protection device for surge arresters
DE19919292A1 (en) * 1999-04-28 2000-11-02 Prodex Technologie Gmbh Mobile protection device with current measuring equipment to record current on the ground wire and switch off the current

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