EP2575154B1 - Medium-voltage electric distribution cubicle - Google Patents

Medium-voltage electric distribution cubicle Download PDF

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Publication number
EP2575154B1
EP2575154B1 EP12306077.4A EP12306077A EP2575154B1 EP 2575154 B1 EP2575154 B1 EP 2575154B1 EP 12306077 A EP12306077 A EP 12306077A EP 2575154 B1 EP2575154 B1 EP 2575154B1
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EP
European Patent Office
Prior art keywords
cubicle
current
circuit
electric distribution
breaker
Prior art date
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Application number
EP12306077.4A
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German (de)
French (fr)
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EP2575154A1 (en
Inventor
Christophe Preve
Jean-Pierre Kersusan
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP2575154A1 publication Critical patent/EP2575154A1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H01H33/6661—Combination with other type of switch, e.g. for load break switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/02—Details
    • H01H31/04—Interlocking mechanisms
    • H01H31/10—Interlocking mechanisms for interlocking two or more switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/14—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H01H33/143—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc of different construction or type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/20—Interlocking, locking, or latching mechanisms
    • H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches

Definitions

  • an electrical distribution cell of the kind mentioned above, as described in the patent application is known.
  • FR 2 940 516 This cell comprises a switch or a circuit breaker also performing the disconnector function and, in series with this switch (or circuit breaker) a selector at least two positions respectively a current passage position and a grounding position.
  • This cell is designed to conduct a current of 630 A and is therefore not able to conduct higher current levels, such as 1250 A.
  • these cells that can withstand a higher nominal current than the mid-range generally correspond within a range with low consumption volumes, which means that the industrial costs of such an adaptation are not justified.
  • the present invention solves these problems and proposes a simple and economical electrical distribution cell that can withstand a large nominal current without considerably increasing the necessary investments and the number of subsets made.
  • the subject of the present invention is an electrical distribution cell according to claim 1.
  • the first cell is adapted to conduct up to at least a first current value, while the second cell is sized to conduct at least the entire value of the nominal current minus the first current value mentioned above.
  • the protection means of the first cell comprise a circuit breaker or a switch and the means of conduction and sectioning of the second cell comprise a disconnector or a switch at least two positions.
  • the control mechanism of the circuit breaker controls the opening of the contacts of the disconnector, the contacts of the circuit breaker or the switch then opening with a certain delay, allowing the current to completely switch in the first branch before their separation, then the contacts of the circuit breaker open and remain open for the duration of the cut-off, during which the disconnector contacts continue to open, and during a closing maneuver, the contacts of the circuit breaker close first to establish the current in this so-called first cell, thus closing the protection circuit then, with a certain offset of time, the shut-off circuit being closed, the mechanism of the circuit breaker controls the closing of the contacts of the disconnector.
  • the second cell comprises means for reducing the heating in said second cell.
  • this cell comprises means for distributing the currents flowing respectively in the two cells.
  • these means comprise means for increasing the impedance of the first cell.
  • these means comprise a magnetic circuit placed in the first cell so as to increase its inductance.
  • these means comprise, wound on the magnetic circuit, a winding closed on a resistor, an impedance or said winding itself, said magnetic circuit being placed around a shielded connecting conductor downstream of the two cells.
  • these means comprise at least one pair comprising two balancing transformers respectively placed on two phases respectively belonging to the two cells, these two transformers each pair being electrically connected two by two by one of their secondary.
  • connection interfaces to cables are electrically connected only to the so-called second cell, in order to increase the impedance on the so-called first cell.
  • the lower link opposite the busbar, is designed so as to have a small section and / or have forms to increase its inductance, such as helical shapes.
  • an inductance is added to a dedicated secondary protection current transformers of the so-called first cell so as to increase its impedance and thus limit its current to a small proportion of the nominal current to conduct.
  • the mechanical control device of the disconnector is removed and in that it is directly controlled from the output shaft of the control device of the circuit breaker.
  • control devices respectively of the circuit breaker and the disconnector are interlocked.
  • the circuit breaker comprises a vacuum interrupter to perform the power failure.
  • the mechanism of the circuit breaker controls both the moving contact of the bulb and the contacts of the disconnector.
  • this cell comprises several so-called second cells equipped with disconnectors and making it possible to distribute a larger nominal current, the output shafts of which are mechanically connected to each other, the nominal current being distributed in these different cells.
  • this cell comprises current balancing means, grouped two by two on pairs of neighboring cells.
  • this cell is intended to conduct a current of 1250A, the first and second cells being sized to each conduct a current of 630A.
  • the circuit breaker / switch is in vacuum breaking technology also performing the disconnector function.
  • a medium voltage electrical distribution cell C intended to electrically connect two busbars 1, 2 and to drive a high nominal current, for example in this particular embodiment, a current of 1250 A. , from "standard" cells of lower nominal currents.
  • This cell C is intended to provide several functions, which are, respectively, to allow the passage of current between the busbars 1,2, to achieve an interruption of the current due to the cut made by a circuit breaker following the occurrence of a electrical fault in the circuit, which may occur for example during the protection of the network during a short circuit appeared in the latter, and to perform a sectioning of the circuit for independent operation of the two parts of the network.
  • the first cell a has performance in cutoff and closure but does not allow to drive a high nominal current
  • the second cell b is a cell for driving a high nominal current but has no power cutoff and closure.
  • These two cells a, b are electrically connected in the upper part to a busbar of the upper table, and in the lower part to a lower busbar. These two cells a, b are electrically connected from a downstream side to a busbar of the board, and the other side said upstream to a coupling link located before the connections to the network cables.
  • the upstream and downstream busbars will be adapted to conduct a permanent current of 1250A, or 630A depending on the location of this cell in the table and the balancing or distribution of currents referred to in each branch.
  • the mechanism of the circuit breaker 3 of the first branch a, as well as the disconnector 6 of the second branch b are mechanically connected to operate according to a particular sequencing, as will be explained later.
  • this cell C according to the invention is an arrival cell located at the end of the table.
  • this cell C is arranged in the middle of the table. And on the figure 4 this cell is used to make a coupling and counting cell.
  • the current carried by the downstream busbar 1 will be distributed in all branches.
  • means are provided for distributing this current in such a way that the nominal current is higher in the second branch b, or the second branches b, c, d intended to conduct a current. nominal high.
  • These means may be to increase the impedance in the first cell a having the circuit breaker 3 to reduce the nominal current therethrough and switch all this current or a large part thereof in the disconnector cell 6 which can easily perform this function of keep a high rated current.
  • the circuit breaker 3 opens the contacts of the disconnector 6 by coupling the mechanism of the circuit breaker to the disconnector mechanism, the contacts of the bulb 13 opening with a certain delay.
  • the opening of the contacts of the bulb realizes the opening of the cut-off circuit.
  • the bulb remains open for the duration of the break, the recovery voltage being held across the disconnector 6 and the bulb 13.
  • the two control mechanisms can be kept and interlocked.
  • the mechanical connection between the two mechanisms allows a rapid maneuver of the switchgear of the switch of the second cell during the decompression of the closing springs of the circuit breaker bulb.
  • the table thus produced is adapted to carry a current of 1250A, its busbar being dimensioned for 1250A and the lower or upper coupling bars being adapted to conduct a current of 1250A or a current of 630A, according to the configuration of the board.
  • the disconnector must not interrupt or turn on the power because it does not have these two performances. It can just support a short arc for switching the current to be cut.
  • the lower link opposite to the busbar, could be designed of small section and / or include forms increasing its inductance. For example helical shapes.
  • Another solution could also be to add balancing current transformers on the two branches and cabled in opposition.
  • circuit breaker cell with a very small section of copper, at least over a certain portion of its circuit, the isolating cell being sized to hold the permanent current and its section to be calculated so as to hold the current short circuit during the current switching time (a few ms) on opening.
  • the present invention therefore proposes to perform a combination of cells based on the paralleling of a cell, called the nominal current, intended to conduct the nominal current, and a so-called control-protection cell, intended to perform the control functions. and electrical protection.
  • This nominal current cell will only see part of this rated current and will never have to cut or establish it.
  • the "control-protection” cell will see only a part of the nominal current, but above all will have to cut and establish all types of current.
  • the so-called “nominal current” cell includes a disconnector while the cell called “protection -command” has a circuit breaker. It is the control mechanism of the circuit breaker that operates in direct contact with the circuit breaker contacts and at the same time the contacts of the disconnector.
  • the location of the vacuum interrupter will receive a shielded over-molded conductor including at these ends the connection interfaces (busbar side and disconnect side). This replacement of the bulb reduces the heating of this cell, which will pass a higher current by increasing the impedance of the first cell relative to the second.
  • the invention therefore makes it possible to considerably increase the value of the nominal current that a cell can conduct from existing cells or existing subsets.
  • the nominal current be chosen by suitably dimensioning the isolator of the second cell, but the value of this current may also be modified by multiplying the number of so-called second cells in parallel with the so-called first cell.
  • the cell created according to the invention is modular, the value of the nominal current can be adapted to the demand by adding modules for sectioning and passage of the nominal current, which will be connected in parallel with the other cells.
  • the present invention therefore extends to any device putting in parallel a circuit breaker cell and a disconnector cell, this disconnector being sized to adapt to the various nominal currents that it is necessary to drive.
  • the connection inserts can for example be sized to adapt to the maximum current to be distributed, and the disconnecting knives, modular design, can be duplicated as needed.
  • the electrical protection device may be a circuit breaker or a switch with or without a vacuum bulb.

Landscapes

  • Gas-Insulated Switchgears (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Patch Boards (AREA)
  • Distribution Board (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Description

La présente invention concerne une cellule de distribution électrique moyenne tension destinée à être interposée entre deux parties d'un circuit électrique de manière à assurer au moins la fonction de passage du courant entre les parties, et de coupure du courant en cas de défaut électrique.The present invention relates to a medium voltage electrical distribution cell intended to be interposed between two parts of an electrical circuit so as to ensure at least the function of current flow between the parts, and cut-off of the current in the event of an electrical fault.

On connaît par exemple une cellule de distribution électrique du genre précédemment mentionnée, telle que décrite dans la demande de brevet FR 2 940 516 . Cette cellule comporte un interrupteur ou un disjoncteur réalisant également la fonction sectionneur et, en série avec cet interrupteur (ou disjoncteur) un sélecteur à au moins deux positions respectivement une position de passage du courant et une position de mise à la terre.For example, an electrical distribution cell of the kind mentioned above, as described in the patent application, is known. FR 2 940 516 . This cell comprises a switch or a circuit breaker also performing the disconnector function and, in series with this switch (or circuit breaker) a selector at least two positions respectively a current passage position and a grounding position.

Cette cellule est conçue pour conduire un courant de 630 A et n'est donc pas apte à conduire des niveaux de courant supérieurs, comme par exemple de 1250 A.This cell is designed to conduct a current of 630 A and is therefore not able to conduct higher current levels, such as 1250 A.

Lorsqu'il est nécessaire d'augmenter les performances en courant nominal de telles cellules, voir de toute cellule similaire, ceci nécessite d'importants investissements et des mises au point importantes, en particulier lorsque ces cellules utilisent des technologies onéreuses par exemple la technique de l'isolation blindée.When it is necessary to increase the nominal current performance of such cells, see any similar cell, this requires significant investment and development, especially when these cells use expensive technologies such as the technique of shielded insulation.

En outre, ces cellules pouvant supporter un courant nominal plus important que le milieu de gamme correspondent en général au sein d'une gamme à de faibles volumes de consommation, d'où il résulte que les coûts industriels d'une telle adaptation ne sont pas justifiés.In addition, these cells that can withstand a higher nominal current than the mid-range generally correspond within a range with low consumption volumes, which means that the industrial costs of such an adaptation are not justified.

De plus, la fonction de conduction du courant est assez onéreuse et problématique dans le cas des disjoncteurs à vide, ceci étant dû au dimensionnement des contacts des ampoules, ainsi qu'à leur forte résistance de contact celle-ci variant avec le nombre de coupure effectuées.In addition, the current conduction function is quite expensive and problematic in the case of vacuum circuit-breakers, this being due to the dimensioning of the contacts of the bulbs, and their high contact resistance, which varies with the number of cut-offs. performed.

D'autre part, développer de telles cellules à fort courant augmente le nombre de références des sous-ensembles, sans compter tous les développements périphériques nécessaires assurant les fonctions principales de la cellule à savoir les fonctions diélectrique et de distribution de courant, cette fonction électrique nécessitant dans certains cas un surmoulage complexe de l'ampoule. Le document " WO 99/52120 A1 " décrit une cellule selon le préambuleOn the other hand, developing such cells with high current increases the number of references of the subsets, without counting all the necessary peripheral developments ensuring the main functions of the cell namely the dielectric and current distribution functions, this electrical function requiring in some cases a complex overmoulding of the bulb. The document " WO 99/52120 A1 "describes a cell according to the preamble

de la revendication 1.of claim 1.

La présente invention résout ces problèmes et propose une cellule de distribution électrique de conception simple et économique pouvant supporter un courant nominal important sans augmenter considérablement les investissements nécessaires et le nombre de sous-ensembles réalisés.The present invention solves these problems and proposes a simple and economical electrical distribution cell that can withstand a large nominal current without considerably increasing the necessary investments and the number of subsets made.

A cet effet, la présente invention a pour objet une cellule de distribution électrique selon la revendication 1.For this purpose, the subject of the present invention is an electrical distribution cell according to claim 1.

Selon une caractéristique particulière, la première cellule est adaptée à conduire jusqu'à au moins une première valeur de courant, tandis que la seconde cellule est dimensionnée pour conduire au moins toute la valeur du courant nominal moins la première valeur de courant précitée.According to a particular characteristic, the first cell is adapted to conduct up to at least a first current value, while the second cell is sized to conduct at least the entire value of the nominal current minus the first current value mentioned above.

Selon une autre caractéristique, les moyens de protection de la première cellule comportent un disjoncteur ou un interrupteur et les moyens de conduction et de sectionnement de la seconde cellule comportent un sectionneur ou un interrupteur à au moins deux positions.According to another characteristic, the protection means of the first cell comprise a circuit breaker or a switch and the means of conduction and sectioning of the second cell comprise a disconnector or a switch at least two positions.

Selon une autre caractéristique, lors d'une manoeuvre d'ouverture, le mécanisme de commande du disjoncteur commande l'ouverture des contacts du sectionneur, les contacts du disjoncteur ou respectivement de l'interrupteur s'ouvrant ensuite avec un certain retard, permettant au courant de commuter totalement dans la première branche avant leur séparation, puis les contacts du disjoncteur s'ouvrent et restent ouverts pendant toute la durée de la coupure, pendant laquelle les contacts du sectionneur continuent à s'ouvrir, et que lors d'une manoeuvre de fermeture, les contacts du disjoncteur se ferment en premier permettant d'établir le courant dans cette cellule dite première, fermant ainsi le circuit de protection, puis avec un certain décalage de temps, le circuit de coupure-fermeture étant fermé, le mécanisme du disjoncteur commande la fermeture des contacts du sectionneur.According to another characteristic, during an opening maneuver, the control mechanism of the circuit breaker controls the opening of the contacts of the disconnector, the contacts of the circuit breaker or the switch then opening with a certain delay, allowing the current to completely switch in the first branch before their separation, then the contacts of the circuit breaker open and remain open for the duration of the cut-off, during which the disconnector contacts continue to open, and during a closing maneuver, the contacts of the circuit breaker close first to establish the current in this so-called first cell, thus closing the protection circuit then, with a certain offset of time, the shut-off circuit being closed, the mechanism of the circuit breaker controls the closing of the contacts of the disconnector.

Selon une autre caractéristique, la seconde cellule comporte des moyens pour réduire l'échauffement dans ladite seconde cellule.According to another characteristic, the second cell comprises means for reducing the heating in said second cell.

Selon une autre caractéristique, cette cellule comporte des moyens pour répartir les courants circulant respectivement dans les deux cellules.According to another characteristic, this cell comprises means for distributing the currents flowing respectively in the two cells.

Avantageusement, ces moyens comportent des moyens pour augmenter l'impédance de la première cellule.Advantageously, these means comprise means for increasing the impedance of the first cell.

Selon une caractéristique particulière, ces moyens comportent un circuit magnétique placé dans la première cellule de manière à augmenter son inductance.According to a particular characteristic, these means comprise a magnetic circuit placed in the first cell so as to increase its inductance.

Selon une autre réalisation, ces moyens comportent, bobiné sur le circuit magnétique, un enroulement fermé sur une résistance, une impédance ou bien ledit enroulement lui-même, ledit circuit magnétique étant placé autour d'un conducteur blindé de liaison aval des deux cellules.According to another embodiment, these means comprise, wound on the magnetic circuit, a winding closed on a resistor, an impedance or said winding itself, said magnetic circuit being placed around a shielded connecting conductor downstream of the two cells.

Selon une autre réalisation, ces moyens comportent au moins une paire comportant deux transformateurs d'équilibrage placés respectivement sur deux phases appartenant respectivement aux deux cellules, ces deux transformateurs de chaque paire étant reliés électriquement deux à deux par l'un de leurs secondaires.According to another embodiment, these means comprise at least one pair comprising two balancing transformers respectively placed on two phases respectively belonging to the two cells, these two transformers each pair being electrically connected two by two by one of their secondary.

Selon une autre réalisation, les interfaces de raccordement à des câbles sont reliées électriquement uniquement à la cellule dite seconde, afin d'augmenter l'impédance sur la cellule dite première.According to another embodiment, the connection interfaces to cables are electrically connected only to the so-called second cell, in order to increase the impedance on the so-called first cell.

Selon une caractéristique particulière, dans ce cas, la liaison inférieure, opposée au jeu de barres, est conçue de manière à présenter une faible section et/ou présenter des formes permettant d'augmenter son inductance, telle des formes hélicoïdales.According to a particular characteristic, in this case, the lower link, opposite the busbar, is designed so as to have a small section and / or have forms to increase its inductance, such as helical shapes.

Selon une autre réalisation, une inductance est ajoutée à un secondaire dédié des transformateurs de courant de protection de la cellule dite première de manière à augmenter son impédance et ainsi limiter son courant à une faible proportion du courant nominal à conduire.According to another embodiment, an inductance is added to a dedicated secondary protection current transformers of the so-called first cell so as to increase its impedance and thus limit its current to a small proportion of the nominal current to conduct.

Selon une caractéristique particulière, le dispositif de commande mécanique du sectionneur est supprimé et en ce que celui-ci est directement commandé à partir de l'arbre de sortie du dispositif de commande du disjoncteur.According to a particular characteristic, the mechanical control device of the disconnector is removed and in that it is directly controlled from the output shaft of the control device of the circuit breaker.

Selon une autre réalisation, les dispositifs de commande respectivement du disjoncteur et du sectionneur sont inter-verrouillés.In another embodiment, the control devices respectively of the circuit breaker and the disconnector are interlocked.

Avantageusement, le disjoncteur comporte une ampoule à vide pour réaliser la coupure du courant.Advantageously, the circuit breaker comprises a vacuum interrupter to perform the power failure.

On notera que d'autres technologies de coupure tels celles faisant appel au pistonnage ou à l'auto-expansion peuvent être envisagées du moment que la disposition choisie permette un mouvement de l'arbre de commande du disjoncteur assez important avant la séparation des contacts.Note that other cutting technologies such as those involving the piston or auto-expansion can be envisaged as long as the chosen arrangement allows movement of the circuit breaker control shaft large enough before the separation of the contacts.

Selon une caractéristique particulière, le mécanisme du disjoncteur commande à la fois le contact mobile de l'ampoule et les contacts du sectionneur.According to a particular characteristic, the mechanism of the circuit breaker controls both the moving contact of the bulb and the contacts of the disconnector.

Selon une caractéristique particulière, cette cellule comporte plusieurs cellules dites secondes équipées de sectionneurs et permettant de distribuer un courant nominal plus important, dont les arbres de sortie sont reliés mécaniquement entre eux, le courant nominal étant réparti dans ces différentes cellules.According to one particular characteristic, this cell comprises several so-called second cells equipped with disconnectors and making it possible to distribute a larger nominal current, the output shafts of which are mechanically connected to each other, the nominal current being distributed in these different cells.

Selon une caractéristique particulière, cette cellule comporte des moyens d'équilibrage du courant, regroupés deux par deux sur des paires de cellules voisines.According to a particular characteristic, this cell comprises current balancing means, grouped two by two on pairs of neighboring cells.

Selon une réalisation particulière, cette cellule est une cellule d'arrivée disposée en extrémité de tableau, une cellule d'arrivée disposée en milieu de tableau, ou bien une cellule de couplage ou de comptage.According to a particular embodiment, this cell is an arrival cell disposed at the end of an array, an arrival cell disposed in the middle of an array, or a coupling or counting cell.

Selon une caractéristique particulière, cette cellule est destinée à conduire un courant de 1250A, les première et seconde cellules étant dimensionnées pour conduire chacune un courant de 630A.According to a particular characteristic, this cell is intended to conduct a current of 1250A, the first and second cells being sized to each conduct a current of 630A.

Selon une autre caractéristique, le disjoncteur/interrupteur est à technologie de coupure dans le vide réalisant également la fonction sectionneur.According to another characteristic, the circuit breaker / switch is in vacuum breaking technology also performing the disconnector function.

Mais d'autres avantages et caractéristiques de l'invention apparaîtront mieux dans la description détaillée qui suit et se réfère aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels :

  • La figure 1 est une représentation schématique, illustrant une cellule selon l'invention pendant la phase de sectionnement du courant,
  • La figure 2 est une représentation schématique illustrant une cellule selon l'invention, utilisée en cellule d'arrivée dans un tableau électrique,
  • La figure 3 est une représentation schématique, illustrant une cellule selon l'invention, utilisée en milieu de tableau,
  • La figure 4 est une représentation schématique, illustrant une cellule selon l'invention, utilisée comme cellule de couplage et de comptage,
  • La figure 5 est une représentation schématique, illustrant une cellule selon l'invention comportant des moyens pour augmenter l'impédance dans la cellule dédiée à la protection,
  • La figure 6 est une représentation schématique illustrant une cellule selon l'invention, comportant des moyens de répartition du courant dans les deux branches, et
  • La figure 7 est une représentation illustrant de manière schématique, une cellule selon une autre réalisation de l'invention permettant d'augmenter encore les performances en courant nominal de la cellule,
But other advantages and features of the invention will become more apparent in the detailed description which follows and refers to the accompanying drawings given solely by way of example and in which:
  • The figure 1 is a schematic representation illustrating a cell according to the invention during the phase of sectioning the current,
  • The figure 2 is a schematic representation illustrating a cell according to the invention, used in an arrival cell in an electrical panel,
  • The figure 3 is a schematic representation, illustrating a cell according to the invention, used in the middle of the table,
  • The figure 4 is a schematic representation, illustrating a cell according to the invention, used as a coupling and counting cell,
  • The figure 5 is a schematic representation illustrating a cell according to the invention comprising means for increasing the impedance in the cell dedicated to protection,
  • The figure 6 is a schematic representation illustrating a cell according to the invention, comprising means for distributing the current in the two branches, and
  • The figure 7 is a representation schematically illustrating a cell according to another embodiment of the invention for further increasing the nominal current performance of the cell,

Sur les figures a été représentée une cellule C de distribution électrique moyenne tension selon l'invention, destinée à relier électriquement deux jeux de barres 1,2 et à conduire un courant nominal élevé, par exemple dans cette réalisation particulière, un courant de 1250 A, à partir de cellules « standard » de courants nominaux plus faibles.In the figures there is shown a medium voltage electrical distribution cell C according to the invention, intended to electrically connect two busbars 1, 2 and to drive a high nominal current, for example in this particular embodiment, a current of 1250 A. , from "standard" cells of lower nominal currents.

Cette cellule C est destinée à assurer plusieurs fonctions, lesquelles sont respectivement, de permettre le passage du courant entre les jeux de barre 1,2, de réaliser une interruption du courant grâce à la coupure réalisée par un disjoncteur suite à la survenue d'un défaut électrique dans le circuit, pouvant survenir par exemple lors de la protection du réseau lors d'un court-circuit apparu dans ce dernier, et de réaliser un sectionnement du circuit permettant une exploitation indépendante des deux parties du réseau.This cell C is intended to provide several functions, which are, respectively, to allow the passage of current between the busbars 1,2, to achieve an interruption of the current due to the cut made by a circuit breaker following the occurrence of a electrical fault in the circuit, which may occur for example during the protection of the network during a short circuit appeared in the latter, and to perform a sectioning of the circuit for independent operation of the two parts of the network.

Sur la figure 1, et selon une réalisation particulière de l'invention, cette cellule C comporte deux branches ou cellules a,b disposées en parallèle. La première cellule a comporte un disjoncteur 3 comportant une ampoule à vide 13 en série avec un sectionneur de mise à la terre 4, tandis que la seconde cellule b comporte un pont de barre 5 constitué par un conducteur en cuivre en série avec un sectionneur 6.On the figure 1 and according to a particular embodiment of the invention, this cell C comprises two branches or cells a, b arranged in parallel. The first cell comprises a circuit breaker 3 comprising a vacuum interrupter 13 in series with an earthing switch 4, while the second cell b comprises a bar bridge 5 constituted by a copper conductor in series with a disconnector 6. .

La première cellule a possède des performances en coupure et fermeture mais ne permet pas de conduire un courant nominal élevé, tandis que la seconde cellule b est une cellule destinée à conduire un courant nominal élevé mais ne possède pas de pouvoir en coupure et fermeture.The first cell a has performance in cutoff and closure but does not allow to drive a high nominal current, while the second cell b is a cell for driving a high nominal current but has no power cutoff and closure.

Ces deux cellules a,b sont reliées électriquement en partie supérieure à un jeu de barres du tableau supérieur, et en partie inférieure, à un jeu de barres inférieur. Ces deux cellules a,b sont reliées électriquement d'un côté dit aval à un jeu de barres du tableau, et de l'autre côté dit amont à une liaison de couplage située avant les raccordements aux câbles du réseau.These two cells a, b are electrically connected in the upper part to a busbar of the upper table, and in the lower part to a lower busbar. These two cells a, b are electrically connected from a downstream side to a busbar of the board, and the other side said upstream to a coupling link located before the connections to the network cables.

Avantageusement, cette seconde cellule b est une cellule identique à la première a à laquelle on a retiré le disjoncteur, lequel a été remplacé par un conducteur surmoulé blindé en forme de barre 5, de manière à réduire l'échauffement de la cellule surtout lorsque ce disjoncteur comporte une ampoule à vide. Par exemple, dans cette réalisation décrite, chacune de ces cellules a,b dite à faible courant nominal peut être destinée à conduire un courant de 630A, tandis que la cellule réalisée selon l'invention constituée par la réunion des deux cellules, permet de tenir un courant nominal de 1250A. Ainsi, cette cellule selon l'invention, permettant de tenir un courant permanent élevé, est constituée à partir de deux cellules existantes adaptées à tenir un courant nominal peu élevé, ce qui permet de rationnaliser la fabrication de telles cellules à courant nominal élevé.Advantageously, this second cell b is a cell identical to the first one to which the circuit breaker has been removed, which has been replaced by a rod-shaped shielded overmolded conductor 5, so as to reduce the heating of the cell, especially when this circuit breaker has a vacuum bulb. For example, in this embodiment described, each of these cells a, b said low nominal current can be intended to conduct a current of 630A, while the cell made according to the invention constituted by the union of the two cells, allows to hold a nominal current of 1250A. Thus, this cell according to the invention, for holding a high permanent current, is formed from two existing cells adapted to maintain a low nominal current, which makes it possible to rationalize the manufacture of such high nominal current cells.

De préférence, dans ce cas, les jeux de barres amont et aval seront adaptés à conduire un courant permanent de 1250A, ou 630A suivant l'emplacement de cette cellule dans le tableau et l'équilibrage ou la distribution des courants visée dans chaque branche.Preferably, in this case, the upstream and downstream busbars will be adapted to conduct a permanent current of 1250A, or 630A depending on the location of this cell in the table and the balancing or distribution of currents referred to in each branch.

Selon une réalisation particulière de l'invention, le mécanisme du disjoncteur 3 de la première branche a, ainsi que le sectionneur 6 de la seconde branche b sont reliés mécaniquement de manière à fonctionner selon un séquencement particulier, comme ceci sera expliqué plus loin.According to a particular embodiment of the invention, the mechanism of the circuit breaker 3 of the first branch a, as well as the disconnector 6 of the second branch b are mechanically connected to operate according to a particular sequencing, as will be explained later.

Sur la figure 2, cette cellule C selon l'invention est une cellule arrivée située en bout de tableau.On the figure 2 this cell C according to the invention is an arrival cell located at the end of the table.

Sur la figure 3, cette cellule C est disposée en milieu de tableau. Et sur la figure 4, cette cellule est utilisée de manière à réaliser une cellule de couplage et de comptage.On the figure 3 , this cell C is arranged in the middle of the table. And on the figure 4 this cell is used to make a coupling and counting cell.

On voit également en se référant à la figure 7, que d'autres cellules c,d,e du type de la seconde cellule b, c'est-à-dire destinées à conduire un courant nominal élevé, pourront être ajoutées en parallèle de la première cellule dite seconde b, le courant distribué au jeu de barres du tableau étant alors réparti à travers toutes les branches, et ce de façon à augmenter le courant nominal.We also see by referring to the figure 7 , that other cells c, d, e of the type of the second cell b, that is to say intended to conduct a high nominal current, may be added in parallel with the first cell called second b, the distributed current the busbar of the board is then distributed through all the branches, and this so as to increase the nominal current.

Ainsi, l'on comprend que le courant transporté par le jeu de barres aval 1 sera réparti dans toutes les branches. Selon une caractéristique de l'invention, des moyens sont prévus pour répartir ce courant de telle façon que le courant nominal soit plus élevé dans la seconde branche b, ou bien les secondes branches b,c,d destinée(s) à conduire un courant nominal élevé.Thus, it is understood that the current carried by the downstream busbar 1 will be distributed in all branches. According to one characteristic of the invention, means are provided for distributing this current in such a way that the nominal current is higher in the second branch b, or the second branches b, c, d intended to conduct a current. nominal high.

Ces moyens pourront consister à augmenter l'impédance dans la première cellule a comportant le disjoncteur 3 pour réduire le courant nominal le traversant et basculer tout ce courant ou une grande partie de celui-ci dans la cellule sectionneur 6 qui peut aisément remplir cette fonction de tenir un courant nominal élevé.These means may be to increase the impedance in the first cell a having the circuit breaker 3 to reduce the nominal current therethrough and switch all this current or a large part thereof in the disconnector cell 6 which can easily perform this function of keep a high rated current.

Selon une réalisation particulière illustrée sur la figure 5, ces moyens comportent par exemple un circuit magnétique 7 placé autour d'un conducteur participant à l'impédance de la cellule a comprenant le disjoncteur 3. Ce circuit magnétique peut aussi comprendre un enroulement 9 fermé sur une résistance 10, une impédance, ou l'enroulement lui-même.According to a particular embodiment illustrated on the figure 5 these means comprise, for example, a magnetic circuit 7 placed around a conductor participating in the impedance of the cell a comprising the circuit breaker 3. This magnetic circuit may also comprise a winding 9 closed on a resistor 10, an impedance, or the winding itself.

Selon une autre réalisation illustrée sur la figure 6, le courant est réparti dans les deux branches a,b au moyen de transformateurs de courant d'équilibrage 11,12 reliés-câblés au niveau de leur secondaire. Dans cette réalisation, on a l1≈N1ls ; l2≈N2ls, d'où l1/l2≈N1/N2 (si ces transformateurs sont dimensionnés pour fonctionner hors saturation de leur circuit magnétique, Is étant le courant circulant dans leur circuit secondaire d'équilibrage.According to another embodiment illustrated on the figure 6 , the current is distributed in the two branches a, b by means of balancing current transformers 11,12 connected-wired at their secondary. In this embodiment, there is 1N1ls; l2≈N2ls, hence l1 / l2≈N1 / N2 (if these transformers are sized for operate off saturation of their magnetic circuit, Is being the current flowing in their secondary balancing circuit.

Selon l'invention, c'est le disjoncteur qui commande l'ouverture et la fermeture du sectionneur. Ainsi, le mécanisme du disjoncteur 3 et le mécanisme du sectionneur 6 sont reliés cinématiquement par des moyens de liaison mécaniques L, de telle manière que ces deux appareils fonctionnement selon un certain séquencement.According to the invention, it is the circuit breaker that controls the opening and closing of the disconnector. Thus, the mechanism of the circuit breaker 3 and the mechanism of the disconnector 6 are kinematically connected by mechanical connection means L, so that these two devices operate in a certain sequence.

Selon une réalisation préférentielle de l'invention, ce séquencement est le suivant :

  • En position fermée, le sectionneur 6 et l'ampoule du disjoncteur 3 sont fermés. Le sectionneur conduit une partie du courant (nominal ou de défaut). L'ampoule étant fermée transite une partie du courant également, le circuit de coupure étant fermé, le courant étant réparti dans les deux branches a,b.
According to a preferred embodiment of the invention, this sequencing is as follows:
  • In the closed position, the disconnector 6 and the bulb of the circuit breaker 3 are closed. The disconnector drives part of the current (nominal or fault). The bulb being closed transits a portion of the current also, the cut-off circuit being closed, the current being distributed in the two branches a, b.

Lors d'une manoeuvre d'ouverture, le disjoncteur 3 ouvre les contacts du sectionneur 6 grâce au couplage du mécanisme du disjoncteur au mécanisme du sectionneur, les contacts de l'ampoule 13 s'ouvrant avec un certain retard. L'ouverture des contacts de l'ampoule réalise l'ouverture du circuit de coupure. L'ampoule reste ouverte pendant toute la durée de la coupure, la tension de rétablissement étant tenue aux bornes du sectionneur 6 et de l'ampoule 13.During an opening maneuver, the circuit breaker 3 opens the contacts of the disconnector 6 by coupling the mechanism of the circuit breaker to the disconnector mechanism, the contacts of the bulb 13 opening with a certain delay. The opening of the contacts of the bulb realizes the opening of the cut-off circuit. The bulb remains open for the duration of the break, the recovery voltage being held across the disconnector 6 and the bulb 13.

Lors d'une manoeuvre de fermeture, c'est le mécanisme de l'ampoule 13 et donc du disjoncteur 3 qui ferme les contacts de l'ampoule en premier, ce qui permet d'établir le courant dans cette branche a, le circuit de coupure étant fermé, puis après un certain temps, ce même mécanisme ferme les contacts du sectionneur 6. Un courant s'établit entre les contacts de l'ampoule, puis parallèlement en suite entre les contacts du sectionneur 6.During a closing maneuver, it is the mechanism of the bulb 13 and therefore of the circuit breaker 3 which closes the contacts of the bulb first, which makes it possible to establish the current in this branch a, the circuit of cutoff being closed, then after a certain time, this same mechanism closes the contacts of the disconnector 6. A current is established between the contacts of the bulb, then parallel thereafter between the contacts of the disconnector 6.

Selon la réalisation décrite, le sectionneur 6 de la (des) seconde(s) cellule(s) b est commandé à partir du mécanisme de la première cellule a au moyen d'une liaison mécanique reliant l'arbre de sortie du mécanisme de commande du disjoncteur à l'équipage mobile du sectionneur, le mécanisme de commande du sectionneur ayant été retiré.According to the embodiment described, the disconnector 6 of the second cell (s) is controlled from the mechanism of the first cell by means of a mechanical connection connecting the output shaft of the control mechanism. from the circuit breaker to the moving part of the disconnector, the control mechanism of the disconnector having been removed.

Selon une autre réalisation non représentée, les deux mécanismes de commande pourront être conservés et inter-verrouillés.According to another embodiment not shown, the two control mechanisms can be kept and interlocked.

Selon une réalisation préférentielle, la liaison mécanique entre les deux mécanismes permet une manoeuvre rapide du palonnier du sectionneur de la seconde cellule pendant la décompression des ressorts de fermeture de l'ampoule du disjoncteur.According to a preferred embodiment, the mechanical connection between the two mechanisms allows a rapid maneuver of the switchgear of the switch of the second cell during the decompression of the closing springs of the circuit breaker bulb.

Ainsi, le tableau ainsi réalisé est adapté à transporter un courant de 1250A, son jeu de barres étant dimensionné pour 1250A et les barres de couplage inférieures ou supérieures étant adaptées à conduire un courant de 1250A ou bien un courant de 630A, suivant la configuration du tableau.Thus, the table thus produced is adapted to carry a current of 1250A, its busbar being dimensioned for 1250A and the lower or upper coupling bars being adapted to conduct a current of 1250A or a current of 630A, according to the configuration of the board.

Le sectionneur ne doit pas réaliser l'interruption ou l'établissement du courant, car il ne possède pas ces deux performances. Il pourra juste supporter un arc de courte durée permettant de réaliser la commutation du courant à couper.The disconnector must not interrupt or turn on the power because it does not have these two performances. It can just support a short arc for switching the current to be cut.

On notera qu'un équilibrage du courant pourrait également être approché entre les deux branches en conservant tout simplement un raccordement des câbles également réparti sur les deux cellules et en utilisant des liaisons amont et aval adaptées, mais ne permettrait pas en soi de diminuer la valeur du courant dans l'une des branches. Mais toute évolution des impédances dans les deux branches ferait évoluer l'équilibrage obtenu, par exemple une modification des résistances des contacts boulonnés, élastiques ou de coupure en particulier.It should be noted that a balancing of the current could also be approached between the two branches while simply maintaining a cable connection equally distributed on the two cells and using suitable upstream and downstream links, but would not in itself reduce the value. current in one of the branches. But any evolution of the impedances in the two branches would change the balance obtained, for example a change in the strengths of the bolted contacts, elastic or cut in particular.

Une autre solution pour diminuer la valeur du courant dans la branche a pourrait donc consister à relier les moyens de raccordement à l'autre cellule, celle qui doit recevoir le courant le plus élevé.Another solution for decreasing the value of the current in the branch a could therefore consist in connecting the connection means to the other cell, the one which must receive the highest current.

Dans ce cas, la liaison inférieure, opposée au jeu de barres, pourrait être conçue de faible section et/ou comporter des formes augmentant son inductance. Par exemple des formes hélicoïdales.In this case, the lower link, opposite to the busbar, could be designed of small section and / or include forms increasing its inductance. For example helical shapes.

Une autre solution pourrait aussi consister à ajouter des transformateurs de courant d'équilibrage sur les deux branches et câblés en opposition.Another solution could also be to add balancing current transformers on the two branches and cabled in opposition.

Encore une autre solution pourrait consister à utiliser une cellule disjoncteur à très faible section de cuivre, au moins sur une certaine portion de son circuit, la cellule sectionneur étant dimensionnée pour tenir le courant permanent et sa section devant être calculée de manière à tenir le courant de court-circuit pendant la durée de commutation du courant (quelques ms) à l'ouverture.Yet another solution could be to use a circuit breaker cell with a very small section of copper, at least over a certain portion of its circuit, the isolating cell being sized to hold the permanent current and its section to be calculated so as to hold the current short circuit during the current switching time (a few ms) on opening.

La présente invention propose donc de réaliser une combinaison de cellules basée sur la mise en parallèle d'une cellule, dite courant nominal, destinée à conduire le courant nominal, et d'une cellule dite commande-protection, destinée à réaliser les fonctions de commande et de la protection électrique.The present invention therefore proposes to perform a combination of cells based on the paralleling of a cell, called the nominal current, intended to conduct the nominal current, and a so-called control-protection cell, intended to perform the control functions. and electrical protection.

Cette cellule courant nominal ne verra qu'une partie de ce courant nominal et n'aura jamais à le couper ou l'établir.This nominal current cell will only see part of this rated current and will never have to cut or establish it.

La cellule « commande-protection » verra une partie seulement du courant nominal, mais surtout aura à couper et à établir tous les types de courant. La cellule dite « courant nominal » comporte un sectionneur tandis que la cellule dite « protection -commande » comporte un disjoncteur. C'est le mécanisme de commande du disjoncteur qui actionne en direct les contacts du disjoncteur et en même temps les contacts du sectionneur.The "control-protection" cell will see only a part of the nominal current, but above all will have to cut and establish all types of current. The so-called "nominal current" cell includes a disconnector while the cell called "protection -command" has a circuit breaker. It is the control mechanism of the circuit breaker that operates in direct contact with the circuit breaker contacts and at the same time the contacts of the disconnector.

Ainsi, pour réaliser une cellule 1250A à partir d'une cellule 630A, il suffira d'utiliser une cellule du type 630A à laquelle on associera une cellule simplifiée comprenant des conducteurs de plus forte section et un sectionneur qui devra être dimensionné pour conduire au moins toute la valeur de courant nominal moins la première valeur de courant précitée.Thus, to make a 1250A cell from a 630A cell, it will suffice to use a type 630A cell to which will be associated a simplified cell comprising conductors of larger section and a disconnector which must be sized to conduct at least the entire nominal current value minus the first aforesaid current value.

L'emplacement de l'ampoule à vide recevra un conducteur surmoulé blindé comportant en ces extrémités les interfaces de raccordement (côté jeu de barres et côté sectionneur). Ce remplacement de l'ampoule permet de réduire l'échauffement de cette cellule, ce qui permettra de faire passer un courant plus élevé en augmentant l'impédance de la première cellule par rapport à la seconde.The location of the vacuum interrupter will receive a shielded over-molded conductor including at these ends the connection interfaces (busbar side and disconnect side). This replacement of the bulb reduces the heating of this cell, which will pass a higher current by increasing the impedance of the first cell relative to the second.

L'invention permet donc d'augmenter considérablement la valeur du courant nominal que peut conduire une cellule à partir de cellules existantes ou de sous-ensembles existants. Donc, non seulement le courant nominal pourra être choisi en dimensionnant de manière appropriée le sectionneur de la seconde cellule, mais la valeur de ce courant pourra également être modifiée en multipliant le nombre de cellules dites secondes en parallèle de la cellule dite première.The invention therefore makes it possible to considerably increase the value of the nominal current that a cell can conduct from existing cells or existing subsets. Thus, not only can the nominal current be chosen by suitably dimensioning the isolator of the second cell, but the value of this current may also be modified by multiplying the number of so-called second cells in parallel with the so-called first cell.

On ajoutera également que la cellule crée selon l'invention est modulaire, la valeur du courant nominal pouvant être adaptée à la demande en ajoutant des modules de sectionnement et de passage du courant nominal, lesquels seront montés en parallèle des autres cellules.It will also be added that the cell created according to the invention is modular, the value of the nominal current can be adapted to the demand by adding modules for sectioning and passage of the nominal current, which will be connected in parallel with the other cells.

La présente invention s'étend donc à tout dispositif mettant en parallèle une cellule disjoncteur et une cellule sectionneur, ce sectionneur étant dimensionné de façon à s'adapter aux divers courants nominaux qu'il est nécessaire de conduire. Les inserts de raccordement pourront par exemple être dimensionnés pour s'adapter au maximum du courant à distribuer, et les couteaux du sectionneur, de conception modulaire, pourront être dupliqués en fonction du besoin.The present invention therefore extends to any device putting in parallel a circuit breaker cell and a disconnector cell, this disconnector being sized to adapt to the various nominal currents that it is necessary to drive. The connection inserts can for example be sized to adapt to the maximum current to be distributed, and the disconnecting knives, modular design, can be duplicated as needed.

On notera également que l'appareil de protection électrique pourra être un disjoncteur ou un interrupteur comportant ou non une ampoule à vide.Note also that the electrical protection device may be a circuit breaker or a switch with or without a vacuum bulb.

Claims (21)

  1. Modular medium-voltage electric distribution cubicle intended to be interposed between two parts of an electric circuit in such a way as to perform at least the function of current flow between the parts and current cut-off in the event of an electrical fault,
    characterized in that it comprises a first cubicle (a) dedicated to the current cut-off and current establishment, this cubicle comprising electrical protection means (3) having current cut-off and closure capabilities, and at least a second cubicle (b) mounted in parallel with the first, said cubicle being dedicated to the nominal current flow, comprising means (6) for the nominal current conduction and also the short-circuit current conduction before the cut-off phase by the aforementioned protection means (3) and means for isolating the circuit, this second cubicle (b) being dimensioned to conduct high nominal currents, said isolator (6) being controlled by the aforementioned electrical protection means (3), the value of the nominal current being capable of being adapted as required by adding nominal current isolation and flow modules which will be mounted in parallel with the other cubicles.
  2. Electric distribution cubicle according to Claim 1, characterized in that the first cubicle (a) comprises means for conducting up to at least a first current value, whereas the second cubicle (b) comprises means to conduct at least all of the nominal current value minus the aforementioned first current value.
  3. Electric distribution cubicle according to Claim 1 or 2, characterized in that the protection means (3) of the first cubicle (a) comprise a circuit-breaker or a switch and the conduction and isolation means (6) of the second cubicle (b) comprise an isolator (6) or a switch having at least two positions.
  4. Electric distribution cubicle according to Claim 3, characterized in that the control mechanism of the circuit-breaker is mechanically linked to the contacts of the isolator in such a way that, during an opening manoeuver, the control mechanism of the circuit-breaker (3) controls the opening of the contacts of the isolator (6), the contacts of the circuit-breaker (3) or of the switch respectively then opening with a certain delay, enabling the current to switch totally into the first branch (a) before their separation, then the contacts of the circuit-breaker (3) open and remain open for the entire duration of the cut-off, during which the contacts of the isolator (6) continue to open, and that, during a closure manoeuver, the contacts of the circuit-breaker (3) close first allowing the current to be established in said first cubicle (a), thus closing the protection circuit, then, with a certain time lag, the make-break circuit being closed, the mechanism of the circuit-breaker (3) controls the closure of the contacts of the isolator (6).
  5. Electric distribution cubicle according to Claim 3 or 4, characterized in that the second cubicle (b) comprises means to reduce the heating in said second cubicle.
  6. Electric distribution cubicle according to any one of the preceding claims, characterized in that it comprises means to distribute the currents flowing in the two cubicles (a, b) respectively.
  7. Electric distribution cubicle according to Claim 6, characterized in that these means comprise means for increasing the impedance of the first cubicle (a).
  8. Electric distribution cubicle according to Claim 7, characterized in that these means comprise a magnetic circuit (7) placed in the first cubicle (a) in such a way as to increase its inductance.
  9. Electric distribution cubicle according to Claim 7 and 8, characterized in that these means comprise, coiled on the magnetic circuit, a winding (9) closed on a resistor (10), an impedance or indeed said winding itself, said magnetic circuit being placed around a shielded connection conductor downstream of the two cubicles.
  10. Electric distribution cubicle according to Claim 6, characterized in that these means comprise at least one pair comprising two balancing transformers (11, 12) placed on two phases respectively belonging to the two cubicles (a, b) respectively, these two transformers of each pair being electrically connected in pairs by one of their secondaries.
  11. Electric distribution cubicle according to Claim 7, characterized in that the interfaces connecting to cables are electrically connected only to said second cubicle (b) in order to increase the impedance on said first cubicle.
  12. Electric distribution cubicle according to Claim 7, characterized in that an inductor is added to a dedicated secondary of the protection current transformers of said first cubicle in such a way as to increase its impedance and thus limit its current to a small proportion of the nominal current to be conducted.
  13. Electric distribution cubicle according to any one of Claims 3 to 12, characterized in that the mechanical control device of the isolator (6) is removed and in that the latter is directly controlled from the output shaft of the control device of the circuit-breaker (3).
  14. Electric distribution cubicle according to any one of Claims 3 to 13, characterized in that the control devices of the circuit-breaker (3) and the isolator (6) respectively are interlocked.
  15. Electric distribution cubicle according to any one of Claims 3 to 14, characterized in that the circuit-breaker comprises a vacuum tube to implement the cut-off of the current.
  16. Electric distribution cubicle according to Claim 15, characterized in that the mechanism of the circuit-breaker (3) simultaneously controls the mobile contact of the tube (13) and the contacts of the isolator (6).
  17. Electric distribution cubicle according to any one of the preceding claims, characterized in that it comprises a plurality of said second cubicles (c, d, e) equipped with isolators enabling the distribution of a higher nominal current, the output shafts of which are mechanically interconnected, the nominal current being distributed in these different cubicles.
  18. Electric distribution cubicle according to Claim 17, characterized in that it comprises current balancing means grouped in pairs, on pairs of adjacent cubicles.
  19. Electric distribution cubicle according to any one of the preceding claims, characterized in that this cubicle is an input cubicle disposed at the end of the board, an input cubicle disposed in the middle of the board, or a switching or metering cubicle.
  20. Electric distribution cubicle according to any one of the preceding claims, characterized in that this cubicle C is intended to conduct a 1250A current, the first (a) and second (b) cubicles each being dimensioned to conduct a 630A current.
  21. Electric distribution cubicle according to any one of Claims 3 to 20, characterized in that the circuit-breaker/switch (3) uses vacuum cut-off technology, also performing the function of the isolator (6).
EP12306077.4A 2011-09-27 2012-09-07 Medium-voltage electric distribution cubicle Active EP2575154B1 (en)

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FR3021159B1 (en) * 2014-05-15 2016-05-06 Schneider Electric Ind Sas MEDIUM VOLTAGE ELECTRIC CUTTING APPARATUS USING VACUUM CUTTING TECHNIQUE

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Publication number Priority date Publication date Assignee Title
DE3642108A1 (en) * 1986-12-10 1988-06-16 Bbc Brown Boveri & Cie Switching installation for distributing electrical power, and a method for operating the switching installation
WO1999052120A1 (en) * 1998-04-08 1999-10-14 Siemens Aktiengesellschaft Overcurrent circuit-breaker, especially a generator power circuit-breaker
JP3799924B2 (en) * 2000-01-11 2006-07-19 株式会社日立製作所 Power circuit breaker and power plant electrical circuit device
JP4162664B2 (en) * 2005-02-22 2008-10-08 株式会社日立製作所 Vacuum switchgear
FR2940516B1 (en) 2008-12-18 2012-09-28 Schneider Electric Ind Sas MEDIUM VOLTAGE POWER DISTRIBUTION CELL
CN101908435B (en) * 2010-08-05 2012-12-19 西安通大思源电器有限公司 Permanent magnet-operated vacuum circuit breaker

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ES2547343T3 (en) 2015-10-05
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CN103022908A (en) 2013-04-03
FR2980634B1 (en) 2013-09-06
FR2980634A1 (en) 2013-03-29

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