FR2810468A1 - Low voltage electrical overvoltage circuit protection having parallel varistor/differential switching circuit with conducting varistor creating short circuit/creating switching default current. - Google Patents

Low voltage electrical overvoltage circuit protection having parallel varistor/differential switching circuit with conducting varistor creating short circuit/creating switching default current. Download PDF

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Publication number
FR2810468A1
FR2810468A1 FR0008277A FR0008277A FR2810468A1 FR 2810468 A1 FR2810468 A1 FR 2810468A1 FR 0008277 A FR0008277 A FR 0008277A FR 0008277 A FR0008277 A FR 0008277A FR 2810468 A1 FR2810468 A1 FR 2810468A1
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France
Prior art keywords
varistor
differential
creating
circuit
switching
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Withdrawn
Application number
FR0008277A
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French (fr)
Inventor
Bernard Bouquet
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Individual
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Individual
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Priority to FR0008277A priority Critical patent/FR2810468A1/en
Publication of FR2810468A1 publication Critical patent/FR2810468A1/en
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Classifications

    • 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
    • H02H3/335—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 the main function being self testing of the device
    • 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
    • H02H3/20—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 excess voltage

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

Abstract

The overvoltage removal mechanism has a parallel varistor (1) with a differential circuit breaker (2). The circuit is placed between an input connection (A1) and output wires (B2). When an overvoltage appears the varistor conducts creating a default current for the circuit breaker.

Description

La présente invention concerne dispositif pour stopper les surtensions électriques (en basse tension) qui pourraient survenir sur les réseaux de distribution électrique, à vide comme en charge. The present invention relates to a device for stopping electrical overvoltages (at low voltage) which could occur on electrical distribution networks, both empty and loaded.

Les phénomènes de surtension électrique sont assez courants et posent un réel problème pour l'exploitant des réseaux ainsi que pour l'utilisateur lorsque, par exemple, la rupture d'un neutre commun occasionne surtension. Electric overvoltage phenomena are quite common and pose a real problem for the network operator as well as for the user when, for example, the rupture of a common neutral causes overvoltage.

L'invention est caractérisée par branchement particulier (fig. 1) d'une varistance (1) sur un système de coupure différentiel (2). Le branchement consiste à raccorder la varistance (1) entre une borne d'entrée (A1) et une borne de sortie (B2) de l'appareil de coupure differentiel (2) (fig.1). The invention is characterized by particular connection (fig. 1) of a varistor (1) to a differential cut-off system (2). The connection consists in connecting the varistor (1) between an input terminal (A1) and an output terminal (B2) of the differential switching device (2) (fig.1).

Lorsqu'une surtension apparaît, supérieure à la tension de court circuit de la varistance (1), celle ' devient passante, créant un courant de défaut pour le differentiel, déclenchant ce dernier. Le courant de déclenchement différentiel étant faible, l'intensité de défaut<I>créée</I> n'atteint pas une forte valeur et n'occasionne pas de perturbations annexes ni de destruction de la varistance. Cela permet à l'invention fonctionner plusieurs fois, l'utilisateur n'ayant qu'a réenclencher le système.  When an overvoltage appears, greater than the short-circuit voltage of the varistor (1), that 'becomes conducting, creating a fault current for the differential, triggering the latter. The differential trip current being low, the fault intensity <I> created </I> does not reach a high value and does not cause additional disturbances or destruction of the varistor. This allows the invention to work several times, the user only having to reset the system.

Les caractéristiques de la varistance choisie déterminent la valeur maximale de surtension acceptable en fonction des contraintes d'exploitation. The characteristics of the varistor chosen determine the maximum acceptable overvoltage value depending on the operating constraints.

Le système décrit ci-dessus réalise la protection d'un départ bipolaire monophasé. Une modification associant trois varistances (1), (5), (6) sur un système différentiel tétrapolaire (7) assurerait la protection d'un départ triphasé avec neutre (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 system described above provides protection for a single-phase bipolar feeder. A modification associating three varistors (1), (5), (6) on a four-pole differential system (7) would ensure the protection of a three-phase feeder with neutral (fig. 2) The differential cut-out system would either be a differential circuit breaker, either a differential switch, or any other cut-off assembly based on differential tripping.

Pour l'application de l'invention sur les installations existantes, le câblage de la (ou des) varistance(s) au système de coupure différentiel en fils isolés et son introduction dans les évidements est possible. Le montage de la (ou des) varistance(s) dans un boîtier modulaire isolé, à côté du système de coupure différentiel et un câblage extérieur est lui aussi possible. For the application of the invention on existing installations, the wiring of the varistor (s) to the differential cut-off system in insulated wires and its introduction into the recesses is possible. The mounting of the varistor (s) in an insulated modular box, next to the differential switching system and external wiring is also possible.

Pour des générations futures, le câblage et la (ou les) varistance(s) serai(en)t intégrée(s) (3) à l'appareil de coupure différentiel (fig. 3) et (fig. 4). For future generations, the wiring and the varistor (s) will be integrated (3) into the differential switching device (fig. 3) and (fig. 4).

La (ou les) varistance(s) peu(ven)t être debrochable(s), permettant une modularité dans la fonction de protection .ainsi qu'une maintenance aisée. The varistor (s) can be withdrawable, allowing modularity in the protection function as well as easy maintenance.

Afin d'assurer la fonction d'isolation de l'utilisateur par rapport à la source après le déclenchement du système de coupure différentiel, un pôle supplémentaire {8) ( . 3) et (fig.4) asservi mécaniquement aux pôles principaux de distribution d'énergie est ajouté au dispositif. In order to ensure the isolation function of the user with respect to the source after the tripping of the differential shutdown system, an additional pole {8) (. 3) and (fig.4) mechanically controlled by the main distribution poles energy is added to the device.

Ce pôle supplémentaire peut être additif intégré au système de coupure différentiel. This additional pole can be an additive integrated into the differential breaking system.

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

Les figures 3 et 4 représentent le système intégré à une nouvelle génération de systèmes de coupure différentiels, assurant en plus la fonction d'isolation galvanique (totale) entre la source et l'utilisateur. FIGS. 3 and 4 represent the system integrated into a new generation of differential breaking systems, additionally ensuring the function of (total) galvanic isolation between the source and the user.

Claims (6)

REVENDICATIONS 1) Dispositif pour éliminer une surtension, caractérisé par le branchement particulier (fig.CLAIMS 1) Device for eliminating an overvoltage, characterized by the particular connection (fig. 1) d'une varistance ( sur un système de coupure différentiel (2). Le branchement consiste à raccorder la varistance (1) entre une borne d'entrée { et une borne de sortie (B2) de l'appareil de coupure différentiel (2). Lorsqu'une surtension apparaît, supérieure à la tension de court circuit de la varistance (1), celle-ci conduit, créant courant défaut pour le différentiel, déclenchant ce dernier. Dispositif pour éliminer des surtensions, caractérisé par l'association de 3 varistances (1), (5), (6) (fig.1) of a varistor (on a differential cutoff system (2). The connection consists in connecting the varistor (1) between an input terminal {and an output terminal (B2) of the differential cutout device ( 2) .When an overvoltage appears, greater than the short circuit voltage of the varistor (1), the latter leads, creating a fault current for the differential, triggering the latter. Device for eliminating overvoltages, characterized by the association of 3 varistors (1), (5), (6) (fig. 2) sur un système coupure tétrapolaire (7) (fig. 2). Le branchement consiste raccorder les varistances (1), (5), (6) entre une borne d'entrée (A1) correspondant au neutre et les trois bornes de sortie ( ) (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, déclenchant ce dernier.2) on a four-pole disconnection system (7) (fig. 2). The connection consists in connecting the varistors (1), (5), (6) between an input terminal (A1) corresponding to the neutral and the three output terminals () (C2), (D2) of the switching device differential (7) (fig. 2). When an overvoltage appears, higher than the short circuit voltage of the varistor (1), (5) or (6) it becomes on, creating a fault current for the differential, triggering the latter. 3) Dispositif selon les revendications (1) ou (2) appliqué à un disjoncteur différentiel.3) Device according to claims (1) or (2) applied to a differential circuit breaker. 4) Dispositif selon les revendications (1) ou (2) appliqué à un interrupteur différentiel.4) Device according to claims (1) or (2) applied to a differential switch. 5) Dispositif selon les revendications (1) ou (2), et (3) ou (4) caractérisé en ce que la varistance et le câblage soient introduits dans les évidements du système de coupure différentiel ou que la (ou les) varistance(s) soi(en)t placée(s) dans un boîtier modulaire isolé. Le câblage étant réalisé extérieurement sur les bornes de connexion.5) Device according to claims (1) or (2), and (3) or (4) characterized in that the varistor and the wiring are introduced into the recesses of the differential breaking system or that the varistor (s) ( s) are placed in an insulated modular box. The wiring is carried out externally on the connection terminals. 6) Dispositif selon les revendications (1) ou (2), et (3) .ou (4) caractérisé par une intégration de l'invention dans le boîtier système de coupure différentiel (7) (fig. 3) et (fig. 4). Dispositif selon les revendications (1) et (2) incluant une varistance dont les caractéristiques sont choisies en fonction contraintes d'exploitation. 8) Dispositif selon les revendications (1) ou ( ), et (3) ou (4), et (6) ou (7) caractérisé par le fait que les varistances soient débrochables, permettant une modularité dans fonction de protection ainsi qu'une maintenance aisée. 9) Dispositif selon les revendications (1) ou ( ), et (3) ou (4), et (6) ou (7), et (8) intégrant un pôle supplémentaire (8) (fig.3) et (fig. 4) asservi mécaniquement avec les pôles principaux de distribution d'énergie. 10) Dispositif selon la revendication (9) caractérisé par le fait que le pôle peut être additif ou intégré lors de fabrication du système de coupure différentiel.6) Device according to claims (1) or (2), and (3) .or (4) characterized by an integration of the invention in the differential switching system housing (7) (fig. 3) and (fig. 4). Device according to claims (1) and (2) including a varistor whose characteristics are chosen according to operating constraints. 8) Device according to claims (1) or (), and (3) or (4), and (6) or (7) characterized in that the varistors are withdrawable, allowing modularity in protection function as well as easy maintenance. 9) Device according to claims (1) or (), and (3) or (4), and (6) or (7), and (8) integrating an additional pole (8) (fig.3) and (fig 4) mechanically controlled with the main poles of energy distribution. 10) Device according to claim (9) characterized in that the pole can be additive or integrated during manufacture of the differential cutoff system.
FR0008277A 2000-06-18 2000-06-18 Low voltage electrical overvoltage circuit protection having parallel varistor/differential switching circuit with conducting varistor creating short circuit/creating switching default current. Withdrawn FR2810468A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0008277A FR2810468A1 (en) 2000-06-18 2000-06-18 Low voltage electrical overvoltage circuit protection having parallel varistor/differential switching circuit with conducting varistor creating short circuit/creating switching default current.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0008277A FR2810468A1 (en) 2000-06-18 2000-06-18 Low voltage electrical overvoltage circuit protection having parallel varistor/differential switching circuit with conducting varistor creating short circuit/creating switching default current.

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FR2810468A1 true FR2810468A1 (en) 2001-12-21

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FR0008277A Withdrawn FR2810468A1 (en) 2000-06-18 2000-06-18 Low voltage electrical overvoltage circuit protection having parallel varistor/differential switching circuit with conducting varistor creating short circuit/creating switching default current.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005026714B3 (en) * 2005-06-09 2006-12-14 Siemens Ag Protection device for switching on/off e.g. consumer load, has over voltage protection unit designed in modular form with unipolar protection modules that are mechanically and electrically connected with switch unit in detachable manner
WO2015167744A1 (en) * 2014-05-01 2015-11-05 Eaton Corporation Surge protection assembly and method for electrical switching apparatus

Citations (2)

* 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
DE9212800U1 (en) * 1992-09-23 1992-11-19 Siemens Ag, 8000 Muenchen, De

Patent Citations (2)

* 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
DE9212800U1 (en) * 1992-09-23 1992-11-19 Siemens Ag, 8000 Muenchen, De

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005026714B3 (en) * 2005-06-09 2006-12-14 Siemens Ag Protection device for switching on/off e.g. consumer load, has over voltage protection unit designed in modular form with unipolar protection modules that are mechanically and electrically connected with switch unit in detachable manner
WO2015167744A1 (en) * 2014-05-01 2015-11-05 Eaton Corporation Surge protection assembly and method for electrical switching apparatus
US9831663B2 (en) 2014-05-01 2017-11-28 Eaton Corporation Surge protection assembly and method for electrical switching apparatus

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