WO2014191498A1 - Improved sectioning device and electrical substation with gas insulation comprising such a device - Google Patents

Improved sectioning device and electrical substation with gas insulation comprising such a device Download PDF

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Publication number
WO2014191498A1
WO2014191498A1 PCT/EP2014/061138 EP2014061138W WO2014191498A1 WO 2014191498 A1 WO2014191498 A1 WO 2014191498A1 EP 2014061138 W EP2014061138 W EP 2014061138W WO 2014191498 A1 WO2014191498 A1 WO 2014191498A1
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WO
WIPO (PCT)
Prior art keywords
electrical
contacts
contact
control device
compartment
Prior art date
Application number
PCT/EP2014/061138
Other languages
French (fr)
Inventor
Ernst Andermatt
Robert Lüscher
Lukas Treier
Original Assignee
Alstom Technology Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Technology Ltd filed Critical Alstom Technology Ltd
Publication of WO2014191498A1 publication Critical patent/WO2014191498A1/en

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Classifications

    • 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
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/42—Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
    • 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
    • H01H33/64—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas

Definitions

  • the present invention relates to an improved sectioning device for separating or electrically connecting two parts of a three-phase electric circuit.
  • Such a device is particularly useful for isolating a part of an electrical circuit - which one wants to put out of operation or on which one wishes to carry out works or measurements without danger - of the remainder of the circuit.
  • the invention is particularly applicable to a disconnecting device intended to be included in a gas-insulated electrical substation (known by the abbreviation of GIS for "gas insulated substation") comprising electrical equipment such as a voltage transformer or arrester, so as to electrically isolate this equipment from the rest of the station.
  • GIS gas insulated electrical substation
  • the disconnecting device is open, the electrical equipment is electrically isolated from the rest of the station and it is then possible to make measurements on the substation without damaging the electrical equipment.
  • a substation is a facility located at the junction of power transmission and distribution lines, which contains protection, transformation and sectioning equipment, in particular, designed to modify certain characteristics of the electrical network to which it is connected, depending on operating constraints.
  • Voltage transformers and medium voltage and high voltage surge arresters that are used in GIS substations are typically intended to be in service for periods of time ranging from 25 to 40 years. It is therefore essential, for a high-performance sectioning device, to be able to withstand a service life of at least 40 years.
  • high voltage gas insulated substations are typically designed to withstand voltages of 72.5 kV or higher.
  • the same goes for the voltage transformers and surge arresters that are included in these stations.
  • a high-performance isolating device must be able to be used with this wide range of voltage transformers and surge arresters.
  • a disconnecting device can be compatible with three-phase voltage transformers at 72.5 kV or higher voltages.
  • the transformer is mobile in rotation or in translation and its connection elements can move in rotation or in translation to come into contact or not with a fixed electrical contact connected to the rest of the electrical station by through a driver.
  • the transformer is moved using a movable element connected to the transformer.
  • the configuration in which the transformer is movable in translation occupies a large space.
  • the configuration in which the transformer is rotatable can not provide a good seal to the enclosure, because using a hollow shaft that emerges from the enclosure to rotate the transformer.
  • moving the transformer requires a lot of force.
  • a three-phase voltage transformer is fixedly disposed in an enclosure. It has fixed high voltage connection elements.
  • the high voltage connection elements of the transformer can come into electrical contact with connection elements connected to the remainder of the electrical station, by means of movable contacts carried by a ring operable in rotation around a central axis of the enclosure, a movable contact inserted between a fixed connection element of the transformer and a fixed connection element connected to the remainder of the substation.
  • the crown is actuated by a toothed wheel in which the crown is inscribed.
  • the actuation mechanism is complex and expensive.
  • a transformer has fixed high voltage connection elements electrically connected to movable contacts via a flexible conductive tube.
  • the movable contacts fixed on a rigid dielectric support can come into electrical contact with fixed connection elements connected to the remainder of the electrical station, when the rigid dielectric support is actuated in translation in the axis of the moving contacts. Guiding means of the dielectric support are provided and they are integral with the enclosure. Actuation is de - energized. In this configuration either, it is not possible to pre-assemble the disconnecting device before its introduction into the enclosure. For high voltage applications, the disconnector requires large diameter flexible conductor tubes. The disconnecting device is bulky because the flexible conductive tubes must not touch the walls of the enclosure.
  • a double-cut shielded sectioning device comprising two fixed connection elements and two movable connecting rods able to move in translation in a metal support and come into electrical contact with a fixed connection element when they project partially out of the metal support. Moving the connecting rods is done using a drive mechanism that is complicated and expensive. This disconnecting device is not integrated into the transformer, it is a bulky and expensive equipment.
  • the inventors have therefore sought to design a powerful cutting device which is both mechanically robust, which can withstand short circuits, which is easily removable and adaptable to a wide range of voltage transformers and transformers.
  • surge arresters which can prevent the formation of particles of electrically conductive material in the compartment electrical equipment and finally, which can be easily operated by an operator.
  • the inventors have in particular endeavored to improve the sectioning device 1 described in document [5] and illustrated in FIG. 1, which comprises three pairs of electrical contacts 20 each having a fixed contact 21 and a movable contact 22, the contact fixed 21 being intended to be connected to a winding 12 of a three-phase voltage transformer 2 and the movable contact 22 being intended to be connected to a fixed connection element 9 of another part 3 of the electrical circuit 4 (FIGS. 2B).
  • Each pair of contacts 20 is associated with a telescopic guide device 10 which makes it possible to guide the movable contact 22 during its displacement towards a connection element 9.
  • the displacement of the movable contacts in their respective guiding devices is here controlled by a rod 100 of which one end is connected to the guide devices 10 and the other end through the wall of the enclosure 8 (more particularly, it passes through the cover 6 of the enclosure) in which are located the voltage transformer 2 and the sectioning device 1, which makes it accessible from outside the enclosure.
  • the displacement of the movable contacts 22 is obtained by applying a translational movement to the control rod 100, which causes a translational movement of the movable contacts in the same direction.
  • this sectioning device is that the particles created by the electrical arcs between the contacts of the disconnecting device can fall on the dielectric support 7 which forms the bottom of the enclosure of the voltage transformer and on which are fixed the connection elements 9. Or, the presence of these particles on the dielectric support can damage the dielectric integrity of the voltage transformer.
  • one actuation of the severing device implies that an operator accesses the top of the voltage transformer, which is generally located 3 meters above the ground, which requires the use of a scaffolding or ladder .
  • the object of the invention is to remedy at least partially the disadvantages mentioned above, relating to the embodiments of the prior art.
  • the subject of the present invention is a disconnecting device for separating or electrically connecting a first part of a second part of a three-phase electrical circuit, the device being intended to be disposed in an enclosure of an electrical substation. gaseous insulation and comprising:
  • each pair of electrical contacts having a fixed contact and a moving contact, the moving contact being intended to be electrically connected to the first part of the electrical circuit and the fixed contact being intended to be electrically connected to the second part of the electrical circuit, the two contacts being able to assume an open position or a position closed circuit of the electrical circuit by relative translation of the contacts along a displacement axis;
  • a telescopic device for guiding the movable contact along the axis of displacement, the guiding device having a fixed part integral with the fixed contact and a sliding part movable with respect to the fixed part and carrying the movable contact.
  • the electrical contacts of the pair being electrically connected to one another via the guiding device;
  • motion transmission means connecting the control device and the mobile part of each guide device.
  • the disconnecting device is characterized in that the control device is rotatably mounted relative to an axis of rotation, so that a rotation of the control device around this axis of rotation causes a translation of the movable contact of each pair. of contacts along the axis of movement via the motion transmission means.
  • the fixed part of each guide device has a body forming an envelope in which are housed the moving part and the motion transmission means, this envelope comprising an opening allowing the passage of the movable contact during its displacement relative to the contact. fixed of the same pair of contacts.
  • the body forming an opening envelope is in one piece.
  • This form of envelope of the fixed part serves both to accommodate moving elements and to protect these elements to reduce the electric field on these elements.
  • the outer surface of the envelope is designed so as to completely protect the motion transmission means whose dielectric integrity would be, without this envelope, deteriorated by the presence of an electric field on their surface.
  • the body forming an envelope comprises a hole which is traversed by the control device.
  • the body forming an envelope and the associated fixed contact are one and the same piece.
  • the movement transmission means of each guide device may be a connecting rod, preferably having a profile in the shape of a circular arc (for example, a U shape). This particular shape makes it possible to reduce the size of the connecting rod in the envelope, since it makes it possible to place the moving contact of each pair of contacts much closer to the control device.
  • the axis of rotation of the control device is substantially perpendicular to the axis of displacement of the movable contact of each pair of contacts, the axis of displacement and the axis of rotation being preferably coplanar.
  • control device is a shaft (longitudinal body) rotatably mounted about its longitudinal axis.
  • the shaft has a bending stiffness sufficiently low to bend without crushing.
  • the tree has a modulus of elasticity of at least 3200 MPa.
  • the fixed part and the mobile part of the guiding device (which electrically connect the fixed and movable contacts of the same pair of contacts) are made of an electrically conductive material, while the control device (the shaft or the rod) is made of an electrically insulating material.
  • the shaft is poly (ethylene terephthalate) (better known as “polyethylene terephthalate” or PETP).
  • the minimum distance between two fixed guide device parts may be, for example, 489 mm and the minimum thickness of the shaft between these two parts. fixed, for example, 32 mm. It can thus be seen that it is quite possible to obtain a compact disconnecting device.
  • the invention also relates to a gas - insulated electrical substation, characterized in that it comprises:
  • a sealed enclosure having an opening in a wall and being divided into a plurality of watertight compartments including a first compartment and a second compartment which are separated from one another by the same partition, the first compartment being further delimited by a portion of the wall comprising the opening;
  • the first part of the three-phase electrical circuit including at least one electrical equipment selected from a voltage transformer and a surge arrester;
  • the disconnecting device being located in the first compartment and the electrical equipment being located in the second compartment, the control device of the disconnecting device passing through the opening.
  • the control device preferably a shaft or rod
  • the control device is accessible from outside the enclosure of the GIS station.
  • the second compartment is disposed above the first compartment and the partition separating the first and the second compartment is essentially horizontal
  • the control device is a shaft and is disposed substantially parallel to the partition, preferably in a lower part of the first compartment, thus making the tree easily accessible to an operator responsible for operating the disconnecting device.
  • the flexibility of the shaft acting as a control device allows a relaxation of the constraints relating to the size and location of the connection elements to the first and second parts of the electrical circuit.
  • the flexibility of the shaft thus allows the pairs of contacts to be moved up and down a few millimeters, which compensates for any variations in the height of the connection elements. This flexibility is particularly useful in GIS stations, where it is common to place the disconnecting device and the connection elements in the same sealed compartment for reasons of compactness.
  • the electrical connection element of the first part of the circuit including the electrical equipment is mounted on the partition separating the first and the second compartment, this partition being made of a dielectric material and being disposed above each pair of contacts. of the severing device.
  • the electrical equipment is thus located above the dielectric partition, while the disconnecting device is located below.
  • a partition made of dielectric material is necessary to separate a voltage transformer or arrester from the other compartments of a GIS post. This particular arrangement therefore makes it possible, on the one hand, to prevent the particles formed during the formation of electric arcs from settling by gravity on the dielectric partition.
  • the disconnecting device and the electrical equipment are located in separate sealed compartments, if particles are formed, they are found in the compartment of the disconnecting device, which is much less troublesome than when they are present in a compartment containing a voltage transformer or a surge arrester.
  • the electrical station comprises a rotational guide bearing of the control device, which is located in the opening of the wall of the enclosure between the control device and the wall and which is provided on its contact surface. with the wall of the enclosure and on its contact surface with the wall of the shaft, sealing means.
  • the sealing means may for example be O-rings, which are preferably arranged in grooves formed in the contact surface of the bearing with the wall of the enclosure and on the contact surface of the bearing with the wall of the device. ordered.
  • the presence of this bearing facilitates the assembly / disassembly of the control device, since in removing it is enlarged de facto the opening in the wall of the enclosure.
  • the contact surface between the control device and the bearing is minimal, so as to allow a possible changing the orientation of the control device to compensate for incorrect positioning of the guiding device or devices.
  • control device passes through the wall of the substation enclosure only at one location, the length of the control device located within the its compartment once mounted is shorter than the distance separating the internal walls of the compartment. It is therefore not embarrassed, during disassembly, by a control device that it would be necessary to arrange inclined in the compartment.
  • FIG. 1 already described, shows a perspective view of a sectioning device according to prior art preassembled before mounting in an electrical station.
  • FIGS. 2A and 2B already described, show the cutting device according to the prior art mounted on a voltage transformer, respectively in the closed and open position.
  • Figure 3 shows a sectional and perspective view of the severing device according to the invention, preassembled and arranged in a chamber.
  • Figure 4 shows a detail of elements of the disconnecting device according to the invention shown in Figure 3, in a sectional view and in perspective.
  • Figure 5 shows another detail of elements of the disconnecting device according to the invention shown in Figure 3, in a sectional view in perspective.
  • FIGS. 2A and 2B show a disconnection device according to the prior art mounted between two parts 2, 3 of a three-phase high or medium voltage electrical circuit 4, one of which is a voltage transformer 2.
  • the three-phase electrical circuit 4 is a high voltage or medium voltage gas-insulated substation (GIS) and is shown schematically by dotted lines.
  • the voltage transformer 2 is placed in a sealed compartment 8, which is delimited by side walls 5 and a cover 6 made of an electrically conductive material, and a partition 7 made of dielectric material, such as epoxy resin or a thermoplastic polyester for example, which forms the bottom of the compartment.
  • This sealed compartment 8 is generally filled with an insulating gas such as sulfur hexafluoride SF 6 .
  • the other part 3 of the electrical circuit is shown schematically by one or more high voltage or medium voltage conductors 11 of the electrical substation 4 which pass through the dielectric partition 7 of the sealed compartment of the transformer and terminate in connection elements 9, with which the contacts moving of the severing device will come into contact to close the electrical circuit 4.
  • connection elements 9 fixed on the dielectric wall 7 which form the bottom of the sealed compartment for receiving the voltage transformer (not shown) and which electrically connect to the voltage transformer, are shown.
  • the disconnecting device here comprises a control device 100 which is preferably a longitudinal body, preferably a shaft or a solid rod, on which are mounted three guidance 10.
  • the guiding devices 10 comprise a fixed part 13 and a movable part 14, which slides in the fixed part 13.
  • Motion transmission means 15 are fixed to the shaft 100, for example by means of a screw 16 or glue, and connect the shaft 100 to the movable portion 14.
  • the moving parts 14 are for example pistons whose apex forms the movable contact 22, intended to come into electrical contact with a connection element 9 in the closed position of the electrical circuit.
  • the fixed parts 13 here have a body forming an integral envelope having a cavity in which are housed the moving parts 14 and the motion transmission means 15, and having at one end an opening for the passage of the moving parts 14 and carrying at the other end a fixed contact 21 intended to be connected to the other part 3 of the electrical circuit of the GIS station, for example by being connected to a busbar 17.
  • the fixed parts 13 in the form of an envelope comprise a through hole in which is inserted the shaft 100.
  • the three movable parts 14 slide in the fixed parts 13 (envelopes) by means of motion transmission means 15 (connecting rods) which couple the sliding pistons to a common control device 100 ( tree) .
  • a rotational movement to the shaft 100 along its longitudinal axis which causes the rods 15 which together with the envelopes 13, convert the rotational movement of the shaft into a translational movement of the pistons 14.
  • the pistons 14 are going thus come n 'fit in bases of complementary shape (connecting elements 9), which are arranged so that the pistons can be inserted in the bases when sliding inside the envelopes.
  • the electrical circuit inside the disconnecting device closes an electrical circuit between the busbar 17 and any element located beyond the base.
  • the portion of the electrical circuit located beyond the bases is a voltage transformer or a surge arrester.
  • the sealed compartment in which the disconnecting device is located is then separated from the sealed compartment in which the voltage transformer or the surge arrester is located by a dielectric partition.
  • the disconnecting device is disposed below the dielectric partition, while the voltage transformer or surge arrester is located above.
  • FIG 3 there is shown three guiding devices 10 for guiding three movable contacts to three connecting elements. But it is quite possible to have more or fewer guide devices, depending on the number of mobile contacts that we want to come into contact with a corresponding number of connection elements.
  • the peculiarity of the shaft 100 is that, when the disconnecting device is installed in the enclosure of the station GIS, at least one of its two ends (and preferably only one of its two ends) passes through the wall of the compartment in which the disconnecting device is located. As this wall is preferably also a part of the wall of the GIS station enclosure, the shaft 100 has an end that is accessible from outside the GIS station. An operator can therefore operate the disconnecting device from outside the GIS station.
  • Figure 4 is shown a detail of Figure 3 and can be seen, in the foreground, a sectional view of a first envelope and, in the background, a view of a second envelope. It is clear in the sectional view that the casing 13 houses a piston 14 and a connecting rod 15 which, according to a preferred embodiment, has a profile in the shape of a circular arc.
  • the fixed contact 21 of the pair of contacts and the fixed part 13 of the guiding device 10 are one and the same piece.
  • one end of the envelopes 13 is connected to a busbar 17. This connection is electrically conductive.
  • the casing Since the casing must be able to conduct the electrical current from its connection to the busbar 17 to the movable contact 22 at the end of the piston 14, the casing must be made of an electrically conductive material.
  • the envelopes and pistons are aluminum.
  • the shaft 100 and the connecting rods must, for their part, be made of a dielectric material.
  • the shaft 100 is made of a flexible material and has a modulus of elasticity of at least 3200 MPa; the tree can for example be in PETP.
  • the shaft 100 is made of a flexible material and has a modulus of elasticity of at least 3200 MPa; the tree can for example be in PETP.
  • only one end of the shaft is coupled with the sealed compartment.
  • the wall of the compartment has an opening 25, which is provided with a rotational guiding bearing 18, which allows to align the shaft 100, so that no further element is needed to maintain the shaft, which in turn mechanically supports the pistons.
  • This particular arrangement of the various elements of the disconnecting device allows the shaft to be sufficiently short, so that its orientation can be chosen independently of any constraints of the walls of the compartment.
  • the coupling of the shaft 100 and the sealed compartment via the single rotational guide bearing also has the advantage of reducing the forces required during assembly and disassembly of the disconnecting device.
  • FIG. 5 shows a detail of FIG. 3 centered on the rotating guide bearing 18.
  • the rotational guide bearing is a sleeve-type bearing which has a short contact zone with the shaft 100.
  • the shaft which has a larger diameter on a portion of the bearing, thus reducing the contact area between the shaft and the bearing. Because of this short contact zone, it is easier to change the orientation of the shaft inside the sealed compartment and around the bearing.
  • the bearing 18 has two pairs of grooves (a pair of grooves 23a, 23b on the inner contact surface and a pair of grooves 24a, 24b on the outer contact surface). O-rings 26 may be disposed in these grooves to ensure gas tightness of the compartment.

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  • Gas-Insulated Switchgears (AREA)

Abstract

The invention relates to a sectioning device for separating or connecting two parts of a three-phase electric circuit, intended to be positioned in an enclosure of a GIS substation. It comprises: three pairs of electrical contacts each having a moving contact and a stationary contact, the two contacts being able to assume an open position or a closed position of the electric circuit by relative translation of the contacts along a movement axis; for each pair of contacts, a telescoping device for guiding the moving contact along the movement axis, the guide device having a stationary part secured to the stationary contact and a moving part sliding relative to the stationary part and bearing the moving contact, the electrical contacts of the pair being electrically connected to each other via the guide device; a control device for controlling the moving part of each guide device to bring the guide device in extension into an open position and a closed position; for each guide device, movement transmission means connecting the control device and the moving part of each guide device. The control device is rotatably mounted relative to an axis of rotation, so that a rotation of the control device around the axis of rotation causes a translation of the moving contact of each pair of contacts along the movement axis via the movement transmission means.

Description

DISPOSITIF DE SECTIONNEMENT AMELIORE  IMPROVED DISCONNECT DEVICE
ET POSTE ELECTRIQUE A ISOLATION GAZEUSE COMPRENANT UN TEL DISPOSITIF  AND ELECTRIC STATION WITH GAS INSULATION COMPRISING SUCH A DEVICE
DESCRIPTION DESCRIPTION
DOMAINE TECHNIQUE TECHNICAL AREA
La présente invention concerne un dispositif de sectionnement amélioré permettant de séparer ou de connecter électriquement deux parties d'un circuit électrique triphasé. The present invention relates to an improved sectioning device for separating or electrically connecting two parts of a three-phase electric circuit.
Un tel dispositif est particulièrement utile pour isoler une partie d'un circuit électrique - que l'on veut mettre hors fonctionnement ou sur laquelle on souhaite effectuer des travaux ou des mesures sans danger - du reste du circuit. Ainsi, l'invention s'applique tout particulièrement à un dispositif de sectionnement destiné à être inclus dans un poste électrique à isolation gazeuse (connu sous l'abréviation anglo-saxonne de GIS pour « gas insulated substation ») comportant un appareillage électrique tel qu'un transformateur de tension ou un parafoudre, de manière à pouvoir isoler électriquement cet appareillage du reste du poste. Ainsi, lorsque le dispositif de sectionnement est ouvert, l'appareillage électrique est isolé électriquement du reste du poste et il est alors possible de faire des mesures sur le poste électrique sans endommager l'appareillage électrique.  Such a device is particularly useful for isolating a part of an electrical circuit - which one wants to put out of operation or on which one wishes to carry out works or measurements without danger - of the remainder of the circuit. Thus, the invention is particularly applicable to a disconnecting device intended to be included in a gas-insulated electrical substation (known by the abbreviation of GIS for "gas insulated substation") comprising electrical equipment such as a voltage transformer or arrester, so as to electrically isolate this equipment from the rest of the station. Thus, when the disconnecting device is open, the electrical equipment is electrically isolated from the rest of the station and it is then possible to make measurements on the substation without damaging the electrical equipment.
On rappelle à ce sujet qu'un poste électrique est une installation située à la jonction de lignes de transport et de distribution d'électricité, qui contient de l'appareillage de protection, de transformation et de sectionnement notamment, destiné à modifier certaines caractéristiques du réseau électrique auquel elle est reliée, en fonction des contraintes d'exploitation. It is recalled in this regard that a substation is a facility located at the junction of power transmission and distribution lines, which contains protection, transformation and sectioning equipment, in particular, designed to modify certain characteristics of the electrical network to which it is connected, depending on operating constraints.
ÉTAT DE LA TECHNIQUE ANTÉRIEURE STATE OF THE PRIOR ART
Les transformateurs de tension et les parafoudres à moyenne tension et à haute tension qui sont utilisés dans les postes électriques GIS sont typiquement destinés à être en service pour des périodes de temps allant de 25 à 40 ans. Il est donc essentiel, pour un dispositif de sectionnement performant, de pouvoir supporter une durée de vie d'au moins 40 ans. Voltage transformers and medium voltage and high voltage surge arresters that are used in GIS substations are typically intended to be in service for periods of time ranging from 25 to 40 years. It is therefore essential, for a high-performance sectioning device, to be able to withstand a service life of at least 40 years.
Par ailleurs, il se trouve que, dans des conditions normales de fonctionnement, un poste électrique ne nécessite pas de révision générale avant 20 ans de mise en service. Un dispositif de sectionnement peut donc tout à fait ne pas être utilisé pendant 20 ans. Un dispositif de sectionnement performant doit donc pouvoir fonctionner parfaitement, même après avoir passé des décennies sans être utilisé.  Moreover, it happens that, under normal operating conditions, a substation does not require a general overhaul before 20 years of commissioning. A sectioning device can therefore not be used for 20 years. A powerful sectioning device must therefore be able to function perfectly, even after having spent decades without being used.
D'autre part, les postes électriques à isolation gazeuse à haute tension sont typiquement conçus pour supporter des tensions de 72,5 kV ou supérieur. Il en va de même pour les transformateurs de tension et les parafoudres qui sont inclus dans ces postes. Il existe donc une large gamme de transformateurs de tension et de parafoudres qui différent en tailles et en conception selon qu'ils sont conçus pour supporter des tensions de 72,5 kV ou des tensions supérieures. Idéalement, un dispositif de sectionnement performant doit pouvoir être utilisé avec cette large gamme de transformateurs de tension et de parafoudres. En particulier, il est intéressant qu'un dispositif de sectionnement puisse être compatible avec des transformateurs de tension triphasés à 72,5 kV ou à des tensions supérieures. On the other hand, high voltage gas insulated substations are typically designed to withstand voltages of 72.5 kV or higher. The same goes for the voltage transformers and surge arresters that are included in these stations. There is therefore a wide range of voltage transformers and surge arresters that differ in size and design depending on whether they are designed to withstand voltages of 72.5 kV or higher. higher voltages. Ideally, a high-performance isolating device must be able to be used with this wide range of voltage transformers and surge arresters. In particular, it is interesting that a disconnecting device can be compatible with three-phase voltage transformers at 72.5 kV or higher voltages.
Il existe plusieurs solutions pour séparer un transformateur de tension (ou un parafoudre) du reste d'un poste électrique haute tension à isolation gazeuse. Cependant, les dispositifs de sectionnement de l'art antérieur présentent tous des inconvénients et sont tous plus ou moins éloignés de ce que l'on considère comme étant un dispositif de sectionnement performant.  There are several solutions for separating a voltage transformer (or arrester) from the rest of a gas-insulated high voltage substation. However, the disconnecting devices of the prior art all have drawbacks and are all more or less distant from what is considered to be an effective sectioning device.
Par exemple, dans le document [1] , le transformateur est mobile en rotation ou en translation et ses éléments de connexion peuvent se déplacer en rotation ou en translation pour venir en contact ou non avec un contact électrique fixe relié au reste du poste électrique par l'intermédiaire d'un conducteur. Le déplacement du transformateur se fait à l'aide d'un élément déplaçable relié au transformateur.  For example, in document [1], the transformer is mobile in rotation or in translation and its connection elements can move in rotation or in translation to come into contact or not with a fixed electrical contact connected to the rest of the electrical station by through a driver. The transformer is moved using a movable element connected to the transformer.
Les inconvénients d'un tel dispositif sont nombreux. Tout d'abord, la configuration dans laquelle le transformateur est mobile en translation occupe un espace important. Par ailleurs, la configuration dans laquelle le transformateur est mobile en rotation ne peut assurer une bonne étanchéité à l'enceinte, car on utilise un arbre creux qui émerge de l'enceinte pour entraîner en rotation le transformateur. De plus, le fait d'entraîner en mouvement le transformateur nécessite une force importante. The disadvantages of such a device are numerous. First, the configuration in which the transformer is movable in translation occupies a large space. Furthermore, the configuration in which the transformer is rotatable can not provide a good seal to the enclosure, because using a hollow shaft that emerges from the enclosure to rotate the transformer. In addition, moving the transformer requires a lot of force.
Dans le document [2] , un transformateur de tension triphasé est disposé de manière fixe dans une enceinte. Il possède des éléments de connexion haute tension fixes. Les éléments de connexion haute tension du transformateur peuvent venir en contact électrique avec des éléments de connexion reliés au reste du poste électrique, par l'intermédiaire de contacts mobiles portés par une couronne actionnable en rotation autour d'un axe central de l'enceinte, un contact mobile s' insérant entre un élément de connexion fixe du transformateur et un élément de connexion fixe relié au reste du poste électrique. L' actionnement de la couronne se fait grâce à une roue dentée dans laquelle la couronne est inscrite. Cependant, le mécanisme d' actionnement est complexe et coûteux. En outre, il n'est pas possible de pré-assembler le dispositif de sectionnement avant son introduction dans l'enceinte et sa coopération avec le transformateur.  In document [2], a three-phase voltage transformer is fixedly disposed in an enclosure. It has fixed high voltage connection elements. The high voltage connection elements of the transformer can come into electrical contact with connection elements connected to the remainder of the electrical station, by means of movable contacts carried by a ring operable in rotation around a central axis of the enclosure, a movable contact inserted between a fixed connection element of the transformer and a fixed connection element connected to the remainder of the substation. The crown is actuated by a toothed wheel in which the crown is inscribed. However, the actuation mechanism is complex and expensive. In addition, it is not possible to pre-assemble the disconnecting device before its introduction into the enclosure and its cooperation with the transformer.
Dans le document [3] , un transformateur comporte des éléments de connexion haute tension fixes reliés électriquement à des contacts mobiles par l'intermédiaire d'un tube conducteur flexible. Les contacts mobiles fixés sur un support diélectrique rigide peuvent venir en contact électrique avec des éléments de connexion fixes reliés au reste du poste électrique, lors de 1 ' actionnement du support diélectrique rigide en translation dans l'axe des contacts mobiles. Des moyens de guidage du support diélectrique sont prévus et ils sont solidaires de l'enceinte. L' actionnement se fait hors tension. Dans cette configuration non plus, il n'est pas possible de pré-assembler le dispositif de sectionnement avant son introduction dans l'enceinte. Pour des applications à haute tension, le dispositif de sectionnement nécessite des tubes conducteurs flexibles de grand diamètre. Le dispositif de sectionnement est encombrant, car les tubes conducteurs flexibles ne doivent pas toucher les parois de l'enceinte. In document [3], a transformer has fixed high voltage connection elements electrically connected to movable contacts via a flexible conductive tube. The movable contacts fixed on a rigid dielectric support can come into electrical contact with fixed connection elements connected to the remainder of the electrical station, when the rigid dielectric support is actuated in translation in the axis of the moving contacts. Guiding means of the dielectric support are provided and they are integral with the enclosure. Actuation is de - energized. In this configuration either, it is not possible to pre-assemble the disconnecting device before its introduction into the enclosure. For high voltage applications, the disconnector requires large diameter flexible conductor tubes. The disconnecting device is bulky because the flexible conductive tubes must not touch the walls of the enclosure.
Dans le document [4] est décrit un dispositif de sectionnement blindé à double coupure comportant deux éléments de connexion fixes et deux tiges de connexion mobiles pouvant se déplacer en translation dans un support métallique et venir en contact électrique avec un élément de connexion fixe lorsqu'elles se projettent partiellement hors du support métallique. Le déplacement des tiges de connexion se fait à l'aide d'un mécanisme d'entraînement qui est compliqué et coûteux. Ce dispositif de sectionnement n'est pas intégré dans le transformateur, c'est alors un équipement encombrant et coûteux .  In the document [4] is described a double-cut shielded sectioning device comprising two fixed connection elements and two movable connecting rods able to move in translation in a metal support and come into electrical contact with a fixed connection element when they project partially out of the metal support. Moving the connecting rods is done using a drive mechanism that is complicated and expensive. This disconnecting device is not integrated into the transformer, it is a bulky and expensive equipment.
Au vu de ces inconvénients, les inventeurs ont donc cherché à concevoir un dispositif de sectionnement performant qui soit à la fois robuste mécaniquement, qui puisse supporter des court-circuits, qui soit facilement démontable et adaptable à une large gamme de transformateurs de tension et de parafoudres, qui puisse éviter la formation de particules en matériau électriquement conducteur dans le compartiment d'un appareillage électrique et enfin, qui puisse être actionné facilement par un opérateur. In view of these drawbacks, the inventors have therefore sought to design a powerful cutting device which is both mechanically robust, which can withstand short circuits, which is easily removable and adaptable to a wide range of voltage transformers and transformers. surge arresters, which can prevent the formation of particles of electrically conductive material in the compartment electrical equipment and finally, which can be easily operated by an operator.
Les inventeurs se sont en particulier appliqué à améliorer le dispositif de sectionnement 1 décrit dans le document [5] et illustré dans la figure 1, qui comprend trois paires de contacts électriques 20 ayant chacun un contact fixe 21 et un contact mobile 22, le contact fixe 21 étant destiné à être relié à un enroulement 12 d'un transformateur de tension triphasé 2 et le contact mobile 22 étant destiné à être relié à un élément de connexion fixe 9 d'une autre partie 3 du circuit électrique 4 (figures 2A et 2B) . A chaque paire de contacts 20 est associé un dispositif télescopique de guidage 10 qui permet de guider le contact mobile 22 lors de son déplacement vers un élément de connexion 9. Le déplacement des contacts mobiles dans leurs dispositifs de guidage respectifs est ici commandé par une tige de commande 100 dont une extrémité est reliée aux dispositifs de guidage 10 et dont l'autre extrémité traverse la paroi de l'enceinte 8 (plus particulièrement, elle traverse le couvercle 6 de l'enceinte) dans laquelle se trouvent le transformateur de tension 2 et le dispositif de sectionnement 1, ce qui la rend accessible de l'extérieur de l'enceinte. Le déplacement des contacts mobiles 22 est obtenu en appliquant un mouvement de translation à la tige de commande 100, ce qui entraine un mouvement de translation des contacts mobiles dans la même direction .  The inventors have in particular endeavored to improve the sectioning device 1 described in document [5] and illustrated in FIG. 1, which comprises three pairs of electrical contacts 20 each having a fixed contact 21 and a movable contact 22, the contact fixed 21 being intended to be connected to a winding 12 of a three-phase voltage transformer 2 and the movable contact 22 being intended to be connected to a fixed connection element 9 of another part 3 of the electrical circuit 4 (FIGS. 2B). Each pair of contacts 20 is associated with a telescopic guide device 10 which makes it possible to guide the movable contact 22 during its displacement towards a connection element 9. The displacement of the movable contacts in their respective guiding devices is here controlled by a rod 100 of which one end is connected to the guide devices 10 and the other end through the wall of the enclosure 8 (more particularly, it passes through the cover 6 of the enclosure) in which are located the voltage transformer 2 and the sectioning device 1, which makes it accessible from outside the enclosure. The displacement of the movable contacts 22 is obtained by applying a translational movement to the control rod 100, which causes a translational movement of the movable contacts in the same direction.
L'inconvénient de ce dispositif de sectionnement est que les particules créées par les arcs électriques entre les contacts du dispositif de sectionnement peuvent tomber sur le support diélectrique 7 qui forme le fond de l'enceinte du transformateur de tension et sur lequel sont fixés les éléments de connexion 9. Or, la présence de ces particules sur le support diélectrique peut endommager l'intégrité diélectrique du transformateur de tension. The disadvantage of this sectioning device is that the particles created by the electrical arcs between the contacts of the disconnecting device can fall on the dielectric support 7 which forms the bottom of the enclosure of the voltage transformer and on which are fixed the connection elements 9. Or, the presence of these particles on the dielectric support can damage the dielectric integrity of the voltage transformer.
D'autre part, 1 ' actionnement du dispositif de sectionnement implique qu'un opérateur accède au sommet du transformateur de tension, qui est généralement situé à 3 mètres du sol, ce qui nécessite l'utilisation d'un échafaudage ou d'une échelle.  On the other hand, one actuation of the severing device implies that an operator accesses the top of the voltage transformer, which is generally located 3 meters above the ground, which requires the use of a scaffolding or ladder .
EXPOSÉ DE L' INVENTION STATEMENT OF THE INVENTION
L' invention a pour but de remédier au moins partiellement aux inconvénients mentionnés ci-dessus, relatifs aux réalisations de l'art antérieur. The object of the invention is to remedy at least partially the disadvantages mentioned above, relating to the embodiments of the prior art.
Pour ce faire, la présente invention a pour objet un dispositif de sectionnement pour séparer ou connecter électriquement une première partie d'une deuxième partie d'un circuit électrique triphasé, le dispositif étant destiné à être disposé dans une enceinte d'un poste électrique à isolation gazeuse et comportant :  To this end, the subject of the present invention is a disconnecting device for separating or electrically connecting a first part of a second part of a three-phase electrical circuit, the device being intended to be disposed in an enclosure of an electrical substation. gaseous insulation and comprising:
- trois paires de contacts électriques, chaque paire de contacts électriques ayant un contact fixe et un contact mobile, le contact mobile étant destiné à être relié électriquement à la première partie du circuit électrique et le contact fixe étant destiné à être relié électriquement à la deuxième partie du circuit électrique, les deux contacts étant aptes à prendre une position ouverte ou une position fermée du circuit électrique par translation relative des contacts selon un axe de déplacement ; three pairs of electrical contacts, each pair of electrical contacts having a fixed contact and a moving contact, the moving contact being intended to be electrically connected to the first part of the electrical circuit and the fixed contact being intended to be electrically connected to the second part of the electrical circuit, the two contacts being able to assume an open position or a position closed circuit of the electrical circuit by relative translation of the contacts along a displacement axis;
- pour chaque paire de contacts, un dispositif télescopique de guidage du contact mobile selon l'axe de déplacement, le dispositif de guidage ayant une partie fixe solidaire du contact fixe et une partie mobile coulissante par rapport à la partie fixe et portant le contact mobile, les contacts électriques de la paire étant reliés électriquement entre eux via le dispositif de guidage ;  for each pair of contacts, a telescopic device for guiding the movable contact along the axis of displacement, the guiding device having a fixed part integral with the fixed contact and a sliding part movable with respect to the fixed part and carrying the movable contact. the electrical contacts of the pair being electrically connected to one another via the guiding device;
- un dispositif de commande de la partie mobile de chaque dispositif de guidage pour amener le dispositif de guidage en extension afin que le contact mobile vienne en contact électrique avec un élément de connexion électrique de la première partie du circuit en position fermée et pour que le dispositif de guidage soit rétracté, interrompant le contact entre le contact mobile et l'élément de connexion électrique en position ouverte ;  a device for controlling the movable portion of each guiding device for bringing the extension guiding device so that the moving contact comes into electrical contact with an electrical connection element of the first part of the circuit in the closed position and for the guiding device is retracted, interrupting the contact between the movable contact and the electrical connection element in the open position;
- pour chaque dispositif de guidage, des moyens de transmission de mouvement reliant le dispositif de commande et la partie mobile de chaque dispositif de guidage.  for each guide device, motion transmission means connecting the control device and the mobile part of each guide device.
Le dispositif de sectionnement est caractérisé en ce que le dispositif de commande est monté rotatif par rapport à un axe de rotation, de telle sorte qu'une rotation du dispositif de commande autour de cet axe de rotation entraine une translation du contact mobile de chaque paire de contacts selon l'axe de déplacement par l'intermédiaire des moyens de transmission de mouvement. L'agencement particulier des différentes pièces du dispositif de sectionnement selon l'invention permet d'obtenir un dispositif plus robuste que les dispositifs de l'art antérieur. The disconnecting device is characterized in that the control device is rotatably mounted relative to an axis of rotation, so that a rotation of the control device around this axis of rotation causes a translation of the movable contact of each pair. of contacts along the axis of movement via the motion transmission means. The particular arrangement of the different parts of the disconnecting device according to the invention makes it possible to obtain a more robust device than the devices of the prior art.
Avantageusement, la partie fixe de chaque dispositif de guidage présente un corps formant une enveloppe dans laquelle sont logés la partie mobile et les moyens de transmission de mouvement, cette enveloppe comportant une ouverture permettant le passage du contact mobile lors de son déplacement par rapport au contact fixe d'une même paire de contacts. De préférence, le corps formant une enveloppe à ouverture est d'un seul tenant. Cette forme d'enveloppe de la partie fixe sert à la fois à loger des éléments mobiles et à protéger ces éléments afin de réduire le champ électrique sur ces éléments. En particulier, la surface externe de l'enveloppe est conçue de telle sorte à protéger complètement les moyens de transmission de mouvement dont l'intégrité diélectrique serait, sans cette enveloppe, détériorée par la présence d'un champ électrique sur leur surface.  Advantageously, the fixed part of each guide device has a body forming an envelope in which are housed the moving part and the motion transmission means, this envelope comprising an opening allowing the passage of the movable contact during its displacement relative to the contact. fixed of the same pair of contacts. Preferably, the body forming an opening envelope is in one piece. This form of envelope of the fixed part serves both to accommodate moving elements and to protect these elements to reduce the electric field on these elements. In particular, the outer surface of the envelope is designed so as to completely protect the motion transmission means whose dielectric integrity would be, without this envelope, deteriorated by the presence of an electric field on their surface.
Selon un mode de réalisation préféré, le corps formant une enveloppe comporte un trou qui est traversé par le dispositif de commande. Cet agencement particulier permet d'améliorer d'avantage la robustesse de l'ensemble des pièces du dispositif de sectionnement .  According to a preferred embodiment, the body forming an envelope comprises a hole which is traversed by the control device. This particular arrangement makes it possible to further improve the robustness of all the parts of the disconnecting device.
Avantageusement, le corps formant une enveloppe et le contact fixe associé sont une seule et même pièce. Selon une variante possible de l'invention, les moyens de transmission de mouvement de chaque dispositif de guidage peuvent être une bielle, ayant de préférence un profil en forme d'arc de cercle (par exemple, une forme de U) . Cette forme particulière permet de réduire l'encombrement de la bielle dans l'enveloppe, puisqu'elle permet de placer le contact mobile de chaque paire de contacts beaucoup plus proche du dispositif de commande. Advantageously, the body forming an envelope and the associated fixed contact are one and the same piece. According to a possible variant of the invention, the movement transmission means of each guide device may be a connecting rod, preferably having a profile in the shape of a circular arc (for example, a U shape). This particular shape makes it possible to reduce the size of the connecting rod in the envelope, since it makes it possible to place the moving contact of each pair of contacts much closer to the control device.
Selon un mode de réalisation préféré de l'invention, l'axe de rotation du dispositif de commande est essentiellement perpendiculaire à l'axe de déplacement du contact mobile de chaque paire de contacts, l'axe de déplacement et l'axe de rotation étant de préférence coplanaire. Cet agencement particulier permet d'augmenter la résistance mécanique des pièces du dispositif de sectionnement, la répartition des forces étant alors optimale.  According to a preferred embodiment of the invention, the axis of rotation of the control device is substantially perpendicular to the axis of displacement of the movable contact of each pair of contacts, the axis of displacement and the axis of rotation being preferably coplanar. This particular arrangement makes it possible to increase the mechanical strength of the parts of the disconnecting device, the distribution of forces then being optimal.
Selon un mode de réalisation préféré, le dispositif de commande est un arbre (corps longitudinal) monté rotatif autour de son axe longitudinal .  According to a preferred embodiment, the control device is a shaft (longitudinal body) rotatably mounted about its longitudinal axis.
De préférence, l'arbre a une rigidité en flexion suffisamment faible pour se courber sans s'écraser. De préférence, l'arbre a un module d'élasticité d'au moins 3200 MPa . L'utilisation d'un arbre qui est mécaniquement flexible permet de faciliter le montage et le démontage du dispositif de sectionnement dans son compartiment étanche. En particulier, du fait de la flexibilité de l'arbre, le montage et le démontage des différents éléments du dispositif de sectionnement requiert moins d'efforts. Preferably, the shaft has a bending stiffness sufficiently low to bend without crushing. Preferably, the tree has a modulus of elasticity of at least 3200 MPa. The use of a shaft which is mechanically flexible makes it easier to assemble and disassemble the disconnecting device in its sealed compartment. In particular, because of the flexibility of the tree, the assembly and disassembly of the various elements of the disconnecting device requires less effort.
Il permet également une certaine souplesse sur la précision de l'emplacement et/ou de la hauteur des éléments de connexion auxquels les contacts mobiles et les contacts fixes du dispositif de sectionnement doivent être reliés.  It also allows some flexibility on the accuracy of the location and / or height of the connection elements to which the movable contacts and the fixed contacts of the disconnecting device must be connected.
Il est à noter que la partie fixe et la partie mobile du dispositif de guidage (qui relient électriquement les contacts fixe et mobile d'une même paire de contacts) sont en un matériau électriquement conducteur, tandis que le dispositif de commande (l'arbre ou la tige) est en un matériau électriquement isolant. De préférence, l'arbre est en poly ( téréphtalate d'éthylène) (plus connu sous le nom anglo-saxon de « polyethylene terephtalate » ou PETP) .  It should be noted that the fixed part and the mobile part of the guiding device (which electrically connect the fixed and movable contacts of the same pair of contacts) are made of an electrically conductive material, while the control device (the shaft or the rod) is made of an electrically insulating material. Preferably, the shaft is poly (ethylene terephthalate) (better known as "polyethylene terephthalate" or PETP).
Il est à noter que, lorsque le dispositif de sectionnement comporte plusieurs paires de contacts, la distance minimale entre deux parties fixes de dispositif de guidage peut être, par exemple, de 489 mm et l'épaisseur minimale de l'arbre entre ces deux parties fixes peut être, par exemple, de 32 mm. On voit ainsi qu'il est tout à fait possible d'obtenir un dispositif de sectionnement compact.  It should be noted that, when the disconnecting device comprises several pairs of contacts, the minimum distance between two fixed guide device parts may be, for example, 489 mm and the minimum thickness of the shaft between these two parts. fixed, for example, 32 mm. It can thus be seen that it is quite possible to obtain a compact disconnecting device.
L' invention concerne également un poste électrique à isolation gazeuse, caractérisé en ce qu'il comporte : The invention also relates to a gas - insulated electrical substation, characterized in that it comprises:
- une enceinte étanche ayant une ouverture dans une paroi et étant divisée en plusieurs compartiments étanches dont un premier compartiment et un deuxième compartiment qui sont séparés l'un de l'autre par une même cloison, le premier compartiment étant en outre délimité par une partie de la paroi comprenant l'ouverture ; a sealed enclosure having an opening in a wall and being divided into a plurality of watertight compartments including a first compartment and a second compartment which are separated from one another by the same partition, the first compartment being further delimited by a portion of the wall comprising the opening;
- une première et une deuxième parties d'un circuit électrique triphasé, la première partie du circuit électrique triphasé incluant au moins un appareillage électrique choisi parmi un transformateur de tension et un parafoudre ; et  a first and a second part of a three-phase electrical circuit, the first part of the three-phase electrical circuit including at least one electrical equipment selected from a voltage transformer and a surge arrester; and
- un dispositif de sectionnement tel que décrit ci-dessus pour séparer ou connecter électriquement les deux parties du circuit électrique triphasé ;  a disconnection device as described above for separating or electrically connecting the two parts of the three-phase electrical circuit;
le dispositif de sectionnement étant situé dans le premier compartiment et l'appareillage électrique étant situé dans le deuxième compartiment, le dispositif de commande du dispositif de sectionnement traversant l'ouverture. Ainsi, le dispositif de commande (de préférence un arbre ou une tige) est accessible de l'extérieur de l'enceinte du poste GIS.  the disconnecting device being located in the first compartment and the electrical equipment being located in the second compartment, the control device of the disconnecting device passing through the opening. Thus, the control device (preferably a shaft or rod) is accessible from outside the enclosure of the GIS station.
De préférence, d'une part, le deuxième compartiment est disposé au-dessus du premier compartiment et la cloison qui sépare le premier et le deuxième compartiment est essentiellement horizontale, et, d'autre part, le dispositif de commande est un arbre et est disposé de manière essentiellement parallèle à la cloison, de préférence dans une partie basse du premier compartiment, rendant ainsi l'arbre aisément accessible à un opérateur chargé d'actionner le dispositif de sectionnement. L'avantage d'un tel agencement est que le dispositif de commande du dispositif de sectionnement selon l'invention est suffisamment simple et facile à actionner pour être manœuvré manuellement. En outre, il peut être manœuvré sans nécessiter l'utilisation d'un échafaudage. Preferably, on the one hand, the second compartment is disposed above the first compartment and the partition separating the first and the second compartment is essentially horizontal, and, on the other hand, the control device is a shaft and is disposed substantially parallel to the partition, preferably in a lower part of the first compartment, thus making the tree easily accessible to an operator responsible for operating the disconnecting device. The advantage of such The arrangement is that the control device of the disconnecting device according to the invention is sufficiently simple and easy to operate to be maneuvered manually. In addition, it can be maneuvered without requiring the use of scaffolding.
Comme nous l'avons vu précédemment, la flexibilité de l'arbre servant de dispositif de commande permet un assouplissement des contraintes relatives à la taille et à l'emplacement des éléments de connexion aux première et deuxième parties du circuit électrique. La flexibilité de l'arbre permet ainsi aux paires de contacts d'être déplacés vers le haut et vers le bas de quelques millimètres, ce qui permet de compenser les éventuelles variations de la hauteur des éléments de connexion. Cette flexibilité est particulièrement utile dans les postes GIS, où il est fréquent de placer le dispositif de sectionnement et les éléments de connexion dans un même compartiment étanche pour des raisons de compacité.  As we have seen previously, the flexibility of the shaft acting as a control device allows a relaxation of the constraints relating to the size and location of the connection elements to the first and second parts of the electrical circuit. The flexibility of the shaft thus allows the pairs of contacts to be moved up and down a few millimeters, which compensates for any variations in the height of the connection elements. This flexibility is particularly useful in GIS stations, where it is common to place the disconnecting device and the connection elements in the same sealed compartment for reasons of compactness.
Avantageusement, l'élément de connexion électrique de la première partie du circuit incluant l'appareillage électrique est monté sur la cloison séparant le premier et le deuxième compartiment, cette cloison étant en un matériau diélectrique et étant disposée au-dessus de chaque paire de contacts du dispositif de sectionnement. L'appareillage électrique est ainsi situé au-dessus de la cloison diélectrique, tandis que le dispositif de sectionnement est situé en- dessous. On rappelle à ce sujet qu'une cloison en matériau diélectrique est nécessaire pour séparer un transformateur de tension ou un parafoudre des autres compartiments d'un poste GIS. Cet agencement particulier permet donc, d'une part, d'éviter que les particules formées lors de la formation d' arcs électriques ne se déposent par gravité sur la cloison diélectrique. D'autre part, étant donné que le dispositif de sectionnement et l'appareillage électrique sont situés dans des compartiments étanches distincts, si des particules sont formées, elles se retrouvent dans le compartiment du dispositif de sectionnement, ce qui est beaucoup moins gênant que lorsqu'elles sont présentes dans un compartiment contenant un transformateur de tension ou un parafoudre . Advantageously, the electrical connection element of the first part of the circuit including the electrical equipment is mounted on the partition separating the first and the second compartment, this partition being made of a dielectric material and being disposed above each pair of contacts. of the severing device. The electrical equipment is thus located above the dielectric partition, while the disconnecting device is located below. It is recalled in this regard that a partition made of dielectric material is necessary to separate a voltage transformer or arrester from the other compartments of a GIS post. This particular arrangement therefore makes it possible, on the one hand, to prevent the particles formed during the formation of electric arcs from settling by gravity on the dielectric partition. On the other hand, since the disconnecting device and the electrical equipment are located in separate sealed compartments, if particles are formed, they are found in the compartment of the disconnecting device, which is much less troublesome than when they are present in a compartment containing a voltage transformer or a surge arrester.
De préférence, le poste électrique comporte un palier de guidage en rotation du dispositif de commande, qui est situé dans l'ouverture de la paroi de l'enceinte entre le dispositif de commande et la paroi et qui est muni, sur sa surface de contact avec la paroi de l'enceinte et sur sa surface de contact avec la paroi de l'arbre, de moyens d' étanchéité . Les moyens d'étanchéité peuvent par exemple être des joints toriques, qui sont de préférence disposés dans des rainures réalisées dans la surface de contact du palier avec la paroi de l'enceinte et sur la surface de contact du palier avec la paroi du dispositif de commande. La présence de ce palier permet de faciliter le montage/démontage du dispositif de commande, puisqu'en le retirant on agrandit de facto l'ouverture dans la paroi de l'enceinte. De préférence, la surface de contact entre le dispositif de commande et le palier est minimale, de manière à permettre un éventuel changement d'orientation du dispositif de commande pour compenser un mauvais positionnement du ou des dispositifs de guidage. Preferably, the electrical station comprises a rotational guide bearing of the control device, which is located in the opening of the wall of the enclosure between the control device and the wall and which is provided on its contact surface. with the wall of the enclosure and on its contact surface with the wall of the shaft, sealing means. The sealing means may for example be O-rings, which are preferably arranged in grooves formed in the contact surface of the bearing with the wall of the enclosure and on the contact surface of the bearing with the wall of the device. ordered. The presence of this bearing facilitates the assembly / disassembly of the control device, since in removing it is enlarged de facto the opening in the wall of the enclosure. Preferably, the contact surface between the control device and the bearing is minimal, so as to allow a possible changing the orientation of the control device to compensate for incorrect positioning of the guiding device or devices.
La solution proposée permet un démontage aisé du dispositif de commande. En outre, étant donné que dans le mode de réalisation préféré de l'invention, le dispositif de commande ne traverse la paroi de l'enceinte du poste qu'en un seul endroit, la longueur du dispositif de commande situé à l'intérieur de son compartiment une fois monté est plus courte que la distance séparant les parois internes du compartiment. On n'est donc pas gêné, lors du démontage, par un dispositif de commande qu'il serait nécessaire de disposer incliné dans le compartiment.  The proposed solution allows easy disassembly of the control device. Furthermore, since in the preferred embodiment of the invention, the control device passes through the wall of the substation enclosure only at one location, the length of the control device located within the its compartment once mounted is shorter than the distance separating the internal walls of the compartment. It is therefore not embarrassed, during disassembly, by a control device that it would be necessary to arrange inclined in the compartment.
L'invention sera mieux comprise et d'autres avantages et particularités apparaîtront à la lecture de la description qui va suivre, donnée à titre d'exemple non limitatif, accompagnée des figures annexées .  The invention will be better understood and other advantages and particularities will become apparent on reading the following description, given by way of non-limiting example, accompanied by the appended figures.
D'autres caractéristiques et avantages de Other features and benefits of
1 ' invention apparaîtront mieux à la lecture du complément de description qui suit, qui se rapporte à un exemple de réalisation d'un dispositif de sectionnement selon l'invention. 1 'invention will appear better on reading the additional description which follows, which relates to an embodiment of a severing device according to the invention.
Bien entendu, cet exemple n'est donné qu'à titre d'illustration de l'objet de l'invention et ne constitue en aucun cas une limitation de cet objet.  Of course, this example is given as an illustration of the subject of the invention and does not constitute a limitation of this object.
BRÈVE DESCRIPTION DES DESSINS BRIEF DESCRIPTION OF THE DRAWINGS
La figure 1, déjà décrite, montre une vue en perspective d'un dispositif de sectionnement selon l'art antérieur préassemblé avant son montage dans un poste électrique. FIG. 1, already described, shows a perspective view of a sectioning device according to prior art preassembled before mounting in an electrical station.
Les figures 2A et 2B, déjà décrites, montrent le dispositif de sectionnement selon l'art antérieur monté sur un transformateur de tension, respectivement en position fermée et ouverte.  FIGS. 2A and 2B, already described, show the cutting device according to the prior art mounted on a voltage transformer, respectively in the closed and open position.
La figure 3 montre une vue en coupe et en perspective du dispositif de sectionnement selon l'invention, préassemblé et disposé dans une enceinte.  Figure 3 shows a sectional and perspective view of the severing device according to the invention, preassembled and arranged in a chamber.
La figure 4 montre un détail d'éléments du dispositif de sectionnement selon l'invention représenté dans la figure 3, selon une vue en coupe et en perspective.  Figure 4 shows a detail of elements of the disconnecting device according to the invention shown in Figure 3, in a sectional view and in perspective.
La figure 5 montre un autre détail d'éléments du dispositif de sectionnement selon l'invention représenté dans la figure 3, selon une vue en coupe et en perspective.  Figure 5 shows another detail of elements of the disconnecting device according to the invention shown in Figure 3, in a sectional view in perspective.
Il est à noter que, dans ce qui précède et ce qui suit, nous avons utilisé des références numériques identiques pour désigner des éléments du dispositif de sectionnement objet de l'invention similaires à ceux de l'art antérieur.  It should be noted that, in what precedes and what follows, we have used identical reference numerals to designate elements of the sectioning device object of the invention similar to those of the prior art.
EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERS DETAILED PRESENTATION OF PARTICULAR EMBODIMENTS
Les figures 2A et 2B montrent un dispositif de sectionnement selon l'art antérieur monté entre deux parties 2, 3 d'un circuit électrique triphasé 4 haute ou moyenne tension dont l'une est un transformateur de tension 2. Le circuit électrique triphasé 4 est un poste électrique haute ou moyenne tension à isolation gazeuse (GIS) et est schématisé par des pointillés. Le transformateur de tension 2 est placé dans un compartiment étanche 8, qui est délimité par des parois latérales 5 et un couvercle 6 en un matériau électriquement conducteur, ainsi qu'une cloison 7 en matériau diélectrique, tel que de la résine époxyde ou d'un polyester thermoplastique par exemple, qui forme le fond du compartiment. Ce compartiment étanche 8 est généralement rempli d'un gaz d'isolation tel que l'hexafluorure de soufre SF6. FIGS. 2A and 2B show a disconnection device according to the prior art mounted between two parts 2, 3 of a three-phase high or medium voltage electrical circuit 4, one of which is a voltage transformer 2. The three-phase electrical circuit 4 is a high voltage or medium voltage gas-insulated substation (GIS) and is shown schematically by dotted lines. The voltage transformer 2 is placed in a sealed compartment 8, which is delimited by side walls 5 and a cover 6 made of an electrically conductive material, and a partition 7 made of dielectric material, such as epoxy resin or a thermoplastic polyester for example, which forms the bottom of the compartment. This sealed compartment 8 is generally filled with an insulating gas such as sulfur hexafluoride SF 6 .
L'autre partie 3 du circuit électrique est schématisée par un ou plusieurs conducteurs haute tension ou moyenne tension 11 du poste électrique 4 qui traversent la cloison diélectrique 7 du compartiment étanche du transformateur et se terminent par des éléments de connexion 9, avec lesquels les contacts mobiles du dispositif de sectionnement vont venir en contact pour fermer le circuit électrique 4.  The other part 3 of the electrical circuit is shown schematically by one or more high voltage or medium voltage conductors 11 of the electrical substation 4 which pass through the dielectric partition 7 of the sealed compartment of the transformer and terminate in connection elements 9, with which the contacts moving of the severing device will come into contact to close the electrical circuit 4.
En référence à la figure 3, on constate tout d'abord que le dispositif de sectionnement selon l'invention n'est plus situé dans le même compartiment étanche que celui dans lequel se trouve le transformateur de tension. On a représenté les éléments de connexion 9, fixés sur la paroi diélectrique 7 qui forme le fond du compartiment étanche destiné à recevoir le transformateur de tension (non représenté) et qui relient électriquement au transformateur de tension .  With reference to FIG. 3, it can be seen first of all that the disconnection device according to the invention is no longer located in the same sealed compartment as that in which the voltage transformer is located. The connection elements 9, fixed on the dielectric wall 7 which form the bottom of the sealed compartment for receiving the voltage transformer (not shown) and which electrically connect to the voltage transformer, are shown.
Le dispositif de sectionnement comporte ici un dispositif de commande 100 qui est de préférence un corps longitudinal, de préférence un arbre ou une tige pleine, sur lequel sont montés trois dispositifs de guidage 10. Les dispositifs de guidage 10 comportent une partie fixe 13 et une partie mobile 14, qui coulisse dans la partie fixe 13. Des moyens de transmission de mouvement 15 sont fixés à l'arbre 100, par exemple à l'aide d'une vis 16 ou de colle, et relient l'arbre 100 à la partie mobile 14. The disconnecting device here comprises a control device 100 which is preferably a longitudinal body, preferably a shaft or a solid rod, on which are mounted three guidance 10. The guiding devices 10 comprise a fixed part 13 and a movable part 14, which slides in the fixed part 13. Motion transmission means 15 are fixed to the shaft 100, for example by means of a screw 16 or glue, and connect the shaft 100 to the movable portion 14.
Les parties mobiles 14 sont par exemple des pistons dont le sommet constitue le contact mobile 22, destiné à venir en contact électrique avec un élément de connexion 9 en position fermée du circuit électrique .  The moving parts 14 are for example pistons whose apex forms the movable contact 22, intended to come into electrical contact with a connection element 9 in the closed position of the electrical circuit.
Les parties fixes 13 ont ici un corps formant une enveloppe d'un seul tenant ayant une cavité dans laquelle sont logés les parties mobiles 14 et les moyens de transmission de mouvement 15, et comportant à une extrémité une ouverture permettant le passage des parties mobiles 14 et portant à l'autre extrémité un contact fixe 21, destiné à être connecté à l'autre partie 3 du circuit électrique du poste GIS, par exemple en étant connecté à un jeu de barres 17.  The fixed parts 13 here have a body forming an integral envelope having a cavity in which are housed the moving parts 14 and the motion transmission means 15, and having at one end an opening for the passage of the moving parts 14 and carrying at the other end a fixed contact 21 intended to be connected to the other part 3 of the electrical circuit of the GIS station, for example by being connected to a busbar 17.
Les parties fixes 13 en forme d'enveloppe comportent un trou traversant dans lequel est inséré 1 ' arbre 100.  The fixed parts 13 in the form of an envelope comprise a through hole in which is inserted the shaft 100.
Dans cet exemple de réalisation, les trois parties mobiles 14 (pistons) coulissent dans les parties fixes 13 (enveloppes) par l'intermédiaire de moyens de transmission de mouvement 15 (bielles) qui couplent les pistons coulissant à un dispositif de commande 100 commun (arbre) . Plus précisément, selon le principe de fonctionnement du dispositif de sectionnement objet de l'invention, on applique un mouvement de rotation à l'arbre 100 selon son axe longitudinal, ce qui entraine les bielles 15 qui vont, ensemble avec les enveloppes 13, convertir le mouvement de rotation de l'arbre en un mouvement de translation des pistons 14. Les pistons 14 vont ainsi venir s' emboîter dans des socles de forme complémentaire (éléments de connexion 9) , qui sont disposés de telle sorte que les pistons peuvent s'insérer dans les socles lorsqu'ils coulissent à l'intérieur des enveloppes. Dès lors que les pistons 14 sont électriquement en contact avec les éléments de connexion 9, le circuit électrique à l'intérieur du dispositif de sectionnement ferme un circuit électrique entre le jeu de barre 17 et tout élément situé au-delà du socle. In this embodiment, the three movable parts 14 (pistons) slide in the fixed parts 13 (envelopes) by means of motion transmission means 15 (connecting rods) which couple the sliding pistons to a common control device 100 ( tree) . More precisely, according to the operating principle of the sectioning device which is the subject of the invention, a rotational movement to the shaft 100 along its longitudinal axis, which causes the rods 15 which together with the envelopes 13, convert the rotational movement of the shaft into a translational movement of the pistons 14. The pistons 14 are going thus come n 'fit in bases of complementary shape (connecting elements 9), which are arranged so that the pistons can be inserted in the bases when sliding inside the envelopes. As the pistons 14 are electrically in contact with the connection elements 9, the electrical circuit inside the disconnecting device closes an electrical circuit between the busbar 17 and any element located beyond the base.
Dans un mode de réalisation préféré, la partie du circuit électrique situé au-delà des socles est un transformateur de tension ou un parafoudre. Le compartiment étanche dans lequel se trouve le dispositif de sectionnement est alors séparé du compartiment étanche dans lequel se trouve le transformateur de tension ou le parafoudre par une cloison diélectrique. Dans un mode de réalisation préféré qui est illustré partiellement dans la figure 3, le dispositif de sectionnement est disposé en dessous de la cloison diélectrique, tandis que le transformateur de tension ou le parafoudre est situé au-dessus. Cette disposition particulière présente l'avantage que toute particule créée au cours de l'ouverture ou de la fermeture du dispositif de sectionnement ne tombe pas sur la cloison diélectrique, évitant ainsi de détériorer l'intégrité diélectrique du transformateur de tension ou du parafoudre. In a preferred embodiment, the portion of the electrical circuit located beyond the bases is a voltage transformer or a surge arrester. The sealed compartment in which the disconnecting device is located is then separated from the sealed compartment in which the voltage transformer or the surge arrester is located by a dielectric partition. In a preferred embodiment which is partially illustrated in Fig. 3, the disconnecting device is disposed below the dielectric partition, while the voltage transformer or surge arrester is located above. This particular arrangement has the advantage that any particle created during the opening or closing of the disconnecting device does not fall on the dielectric partition, thus avoiding deterioration of the dielectric integrity of the voltage transformer or surge arrester.
Il est à noter que les transformateurs de tension et les parafoudres sont bien connus de l'homme du métier et ne sont donc pas décrit ici.  It should be noted that voltage transformers and surge arresters are well known to those skilled in the art and are therefore not described here.
Par ailleurs, il est à noter que dans la figure 3, on a représenté trois dispositifs de guidage 10, destinés à guider trois contacts mobiles vers trois éléments de connexion. Mais il est tout à fait possible d'avoir plus ou moins de dispositifs de guidages, selon le nombre de contacts mobiles que l'on souhaite faire venir en contact avec un nombre correspondant d'éléments de connexion.  Furthermore, it should be noted that in Figure 3, there is shown three guiding devices 10 for guiding three movable contacts to three connecting elements. But it is quite possible to have more or fewer guide devices, depending on the number of mobile contacts that we want to come into contact with a corresponding number of connection elements.
La particularité de l'arbre 100 est que, lorsque le dispositif de sectionnement est installé dans l'enceinte du poste GIS, au moins l'une de ses deux extrémités (et de préférence, une seule de ses deux extrémités) traverse la paroi du compartiment dans lequel se trouve le dispositif de sectionnement. Comme cette paroi est, de préférence, également une partie de la paroi de l'enceinte du poste GIS, l'arbre 100 a une extrémité qui est accessible de l'extérieur du poste GIS. Un opérateur peut donc actionner le dispositif de sectionnement de l'extérieur du poste GIS.  The peculiarity of the shaft 100 is that, when the disconnecting device is installed in the enclosure of the station GIS, at least one of its two ends (and preferably only one of its two ends) passes through the wall of the compartment in which the disconnecting device is located. As this wall is preferably also a part of the wall of the GIS station enclosure, the shaft 100 has an end that is accessible from outside the GIS station. An operator can therefore operate the disconnecting device from outside the GIS station.
Dans la figure 4 est représenté un détail de la figure 3 et l'on peut voir, en premier plan, une vue en coupe d'une première enveloppe et, en arrière- plan, une vue d'une deuxième enveloppe. On voit bien dans la vue en coupe que l'enveloppe 13 loge un piston 14 et une bielle 15 qui, selon un mode de réalisation préféré, a un profil en forme d'arc de cercle. Dans la figure 4, on peut également voir que le contact fixe 21 de la paire de contacts et la partie fixe 13 du dispositif de guidage 10 sont une seule et même pièce. Ainsi, une extrémité des enveloppes 13 est connectée à un jeu de barre 17. Cette connexion est électriquement conductrice. Puisque l'enveloppe doit pouvoir conduire le courant électrique de sa connexion au jeu de barre 17 au contact mobile 22 à l'extrémité du piston 14, l'enveloppe doit être en un matériau électriquement conducteur. Dans un mode de réalisation préféré, les enveloppes et les pistons sont en aluminium. In Figure 4 is shown a detail of Figure 3 and can be seen, in the foreground, a sectional view of a first envelope and, in the background, a view of a second envelope. It is clear in the sectional view that the casing 13 houses a piston 14 and a connecting rod 15 which, according to a preferred embodiment, has a profile in the shape of a circular arc. In FIG. 4, it can also be seen that the fixed contact 21 of the pair of contacts and the fixed part 13 of the guiding device 10 are one and the same piece. Thus, one end of the envelopes 13 is connected to a busbar 17. This connection is electrically conductive. Since the casing must be able to conduct the electrical current from its connection to the busbar 17 to the movable contact 22 at the end of the piston 14, the casing must be made of an electrically conductive material. In a preferred embodiment, the envelopes and pistons are aluminum.
L'arbre 100 et les bielles doivent, quant à eux, être en un matériau diélectrique.  The shaft 100 and the connecting rods must, for their part, be made of a dielectric material.
Selon un mode de réalisation préféré, l'arbre 100 est en un matériau flexible et a un module d'élasticité d'au moins 3200 MPa ; l'arbre peut par exemple être en PETP. En choisissant d'utiliser un arbre flexible, on se laisse la possibilité de compenser d'éventuelles variations des dimensions (notamment la hauteur) des enveloppes 13, des pistons 14 et/ou des éléments de connexion 9. En particulier, l'alignement des enveloppes 13 et des pistons 14 peut être changé de 1,5 mm dans toutes les directions sans perturber l'utilisation du dispositif de sectionnement objet de l'invention.  According to a preferred embodiment, the shaft 100 is made of a flexible material and has a modulus of elasticity of at least 3200 MPa; the tree can for example be in PETP. By choosing to use a flexible shaft, it is possible to compensate for any variations in the dimensions (especially the height) of the envelopes 13, the pistons 14 and / or the connecting elements 9. In particular, the alignment of the envelopes 13 and pistons 14 can be changed by 1.5 mm in all directions without disrupting the use of the sectioning device object of the invention.
Selon un mode de réalisation préféré, seule une extrémité de l'arbre est couplée avec le compartiment étanche. De préférence, la paroi du compartiment comporte une ouverture 25, qui est munie d'un palier de guidage en rotation 18, qui permet d'aligner l'arbre 100, de telle sorte qu'aucun autre élément supplémentaire n'est nécessaire pour maintenir l'arbre, qui à son tour supporte mécaniquement les pistons. Cet agencement particulier des différents éléments du dispositif de sectionnement permet à l'arbre d'être suffisamment court, de sorte que son orientation peut être choisie indépendamment de toutes contraintes des parois du compartiment. Le couplage de l'arbre 100 et du compartiment étanche par l'intermédiaire du seul palier de guidage en rotation présente également l'avantage de réduire les efforts nécessaires au cours de l'assemblage et du désassemblage du dispositif de sectionnement. According to a preferred embodiment, only one end of the shaft is coupled with the sealed compartment. Preferably, the wall of the compartment has an opening 25, which is provided with a rotational guiding bearing 18, which allows to align the shaft 100, so that no further element is needed to maintain the shaft, which in turn mechanically supports the pistons. This particular arrangement of the various elements of the disconnecting device allows the shaft to be sufficiently short, so that its orientation can be chosen independently of any constraints of the walls of the compartment. The coupling of the shaft 100 and the sealed compartment via the single rotational guide bearing also has the advantage of reducing the forces required during assembly and disassembly of the disconnecting device.
Dans la figure 5 est représenté un détail de la figure 3 centré sur le palier de guidage en rotation 18.  FIG. 5 shows a detail of FIG. 3 centered on the rotating guide bearing 18.
Selon un mode de réalisation préféré, le palier de guidage en rotation est un palier de type manchon qui présente une courte zone de contact avec l'arbre 100. Ici, c'est l'arbre qui comporte un diamètre plus grand sur une portion du palier, réduisant ainsi la surface de contact entre l'arbre et le palier. Du fait de cette courte zone de contact, il est plus aisé de changer l'orientation de l'arbre à l'intérieur du compartiment étanche et aux alentours du palier .  According to a preferred embodiment, the rotational guide bearing is a sleeve-type bearing which has a short contact zone with the shaft 100. Here, it is the shaft which has a larger diameter on a portion of the bearing, thus reducing the contact area between the shaft and the bearing. Because of this short contact zone, it is easier to change the orientation of the shaft inside the sealed compartment and around the bearing.
En référence à la figure 5, le palier 18 comporte deux paires de rainures (une paire de rainures 23a, 23b sur la surface interne de contact et une paire de rainures 24a, 24b sur la surface externe de contact). Des joints toriques 26 peuvent être disposés dans ces rainures afin de garantir l'étanchéité aux gaz du compartiment. Referring to Figure 5, the bearing 18 has two pairs of grooves (a pair of grooves 23a, 23b on the inner contact surface and a pair of grooves 24a, 24b on the outer contact surface). O-rings 26 may be disposed in these grooves to ensure gas tightness of the compartment.
REFERENCES CITEES REFERENCES CITED
[1] EP 0 008 821  [1] EP 0 008 821
[2] JP 2007-250597 [2] JP 2007-250597
[3] FR 2 870 635  [3] FR 2 870 635
[4] FR 2 080 311  [4] FR 2 080 311
[5] EP 2 144 261  [5] EP 2,144,261

Claims

REVENDICATIONS
1. Dispositif de sectionnement (1) pour séparer ou connecter électriquement une première partie (2) d'une deuxième partie (3) d'un circuit électrique triphasé (4), le dispositif étant destiné à être disposé dans une enceinte d'un poste électrique à isolation gazeuse et comportant : 1. Disconnecting device (1) for separating or electrically connecting a first portion (2) of a second portion (3) of a three-phase electric circuit (4), the device being intended to be arranged in a chamber of a electrical station with gas insulation and comprising:
- trois paires de contacts électriques (20), chaque paire de contacts électriques (20) ayant un contact fixe (21) et un contact mobile (22), le contact mobile (22) étant destiné à être relié électriquement à la première partie (2) du circuit électrique et le contact fixe (21) étant destiné à être relié électriquement à la deuxième partie (3) du circuit électrique, les deux contacts étant aptes à prendre une position ouverte ou une position fermée du circuit électrique par translation relative des contacts selon un axe de déplacement ;  three pairs of electrical contacts, each pair of electrical contacts having a fixed contact and a movable contact, the mobile contact being intended to be electrically connected to the first part; 2) of the electric circuit and the fixed contact (21) being intended to be electrically connected to the second part (3) of the electrical circuit, the two contacts being able to assume an open position or a closed position of the electrical circuit by relative translation of the contacts along an axis of movement;
- pour chaque paire de contacts (20), un dispositif télescopique de guidage (10) du contact mobile (22) selon l'axe de déplacement, le dispositif de guidage ayant une partie fixe (13) solidaire du contact fixe (21) et une partie mobile (14) coulissante par rapport à la partie fixe (13) et portant le contact mobile (22), les contacts électriques de la paire (20) étant reliés électriquement entre eux via le dispositif de guidage (10) ;  - for each pair of contacts (20), a telescopic device for guiding (10) the movable contact (22) along the axis of displacement, the guiding device having a fixed part (13) integral with the fixed contact (21) and a moving part (14) sliding relative to the fixed part (13) and carrying the movable contact (22), the electrical contacts of the pair (20) being electrically connected to one another via the guiding device (10);
- un dispositif de commande (100) de la partie mobile (14) de chaque dispositif de guidage (10) pour amener le dispositif de guidage en extension afin que le contact mobile (22) vienne en contact électrique avec un élément de connexion électrique (9) de la première partie du circuit (2) en position fermée et pour que le dispositif de guidage soit rétracté, interrompant le contact entre le contact mobile (22) et l'élément de connexion électrique (9) en position ouverte ; a device (100) for controlling the movable part (14) of each guiding device (10) to bring the guiding device in extension so that the movable contact (22) comes into electrical contact with an electrical connection element (9) of the first part of the circuit (2) in the closed position and for the guiding device to be retracted, interrupting the contact between the movable contact (22) and the electrical connection element (9). ) in the open position;
- pour chaque dispositif de guidage (10), des moyens de transmission de mouvement (15) reliant le dispositif de commande (100) et la partie mobile (14) de chaque dispositif de guidage (10) ;  for each guide device (10), motion transmission means (15) connecting the control device (100) and the movable part (14) of each guide device (10);
le dispositif de sectionnement (1) étant caractérisé en ce que le dispositif de commande (100) est monté rotatif par rapport à un axe de rotation, de telle sorte qu'une rotation du dispositif de commande (100) autour de cet axe de rotation entraine une translation du contact mobile de chaque paire de contacts selon l'axe de déplacement par l'intermédiaire des moyens de transmission de mouvement.  the disconnecting device (1) being characterized in that the control device (100) is rotatably mounted relative to an axis of rotation, so that a rotation of the control device (100) about this axis of rotation causes a translation of the movable contact of each pair of contacts along the axis of movement via the motion transmission means.
2. Dispositif de sectionnement selon la revendication 1, dans lequel la partie fixe de chaque dispositif de guidage présente un corps formant une enveloppe dans laquelle sont logés la partie mobile et les moyens de transmission de mouvement, cette enveloppe comportant une ouverture permettant le passage du contact mobile lors de son déplacement par rapport au contact fixe d'une même paire de contacts. 2. Disconnection device according to claim 1, wherein the fixed part of each guide device has a body forming an envelope in which are housed the movable part and the motion transmission means, this envelope having an opening for the passage of the mobile contact when moving relative to the fixed contact of the same pair of contacts.
3. Dispositif de sectionnement selon la revendication 2, dans lequel le corps formant une enveloppe comporte un trou qui est traversé par le dispositif de commande. 3. Disconnection device according to claim 2, wherein the body forming a envelope comprises a hole which is traversed by the control device.
4. Dispositif de sectionnement selon la revendication 2 ou 3, dans lequel le corps formant une enveloppe et le contact fixe associé sont une seule et même pièce. 4. Disconnection device according to claim 2 or 3, wherein the body forming an envelope and the associated fixed contact are a single piece.
5. Dispositif de sectionnement selon l'une quelconque des revendications 1 à 4, dans lequel les moyens de transmission de mouvement de chaque dispositif de guidage sont une bielle, ayant de préférence un profil en forme d'arc de cercle. 5. Disconnection device according to any one of claims 1 to 4, wherein the movement transmission means of each guide device is a connecting rod, preferably having a profile in the form of a circular arc.
6. Dispositif de sectionnement selon l'une quelconque des revendications 1 à 5, dans lequel l'axe de rotation du dispositif de commande est essentiellement perpendiculaire à l'axe de déplacement du contact mobile de chaque paire de contacts, l'axe de déplacement et l'axe de rotation étant de préférence coplanaire . 6. Disconnection device according to any one of claims 1 to 5, wherein the axis of rotation of the control device is substantially perpendicular to the axis of movement of the movable contact of each pair of contacts, the axis of displacement and the axis of rotation preferably being coplanar.
7. Dispositif de sectionnement selon l'une quelconque des revendications 1 à 6, dans lequel le dispositif de commande (100) est un arbre monté rotatif autour de son axe longitudinal. 7. Disconnection device according to any one of claims 1 to 6, wherein the control device (100) is a shaft rotatably mounted about its longitudinal axis.
8. Dispositif de sectionnement selon la revendication 7, dans lequel l'arbre a une rigidité en flexion suffisamment faible pour se courber sans s ' écraser . The disconnecting device of claim 7, wherein the shaft has a bending stiffness sufficiently low to bend without crushing.
9. Dispositif de sectionnement selon la revendication 8, dans lequel l'arbre a un module d'élasticité d'au moins 3200 MPa. The disconnecting device of claim 8, wherein the shaft has a modulus of elasticity of at least 3200 MPa.
10. Poste électrique à isolation gazeuse, caractérisé en ce qu' il comporte : 10. Gas-insulated electrical station, characterized in that it comprises:
- une enceinte étanche ayant une ouverture (25) dans une paroi et étant divisée en plusieurs compartiments étanches dont un premier compartiment et un deuxième compartiment qui sont séparés l'un de l'autre par une même cloison (7), le premier compartiment étant en outre délimité par une partie de la paroi comprenant l'ouverture ;  - a sealed enclosure having an opening (25) in a wall and being divided into a plurality of sealed compartments including a first compartment and a second compartment which are separated from each other by a same partition (7), the first compartment being further delimited by a portion of the wall comprising the opening;
- une première (2) et une deuxième (3) parties d'un circuit électrique triphasé (4), la première partie du circuit électrique triphasé incluant au moins un appareillage électrique choisi parmi un transformateur de tension et un parafoudre ; et  - a first (2) and a second (3) part of a three-phase electrical circuit (4), the first part of the three-phase electrical circuit including at least one electrical equipment selected from a voltage transformer and a surge arrester; and
- un dispositif de sectionnement (1) selon l'une quelconque des revendications 1 à 9 pour séparer ou connecter électriquement les deux parties (2 ; 3) du circuit électrique triphasé ;  - a disconnecting device (1) according to any one of claims 1 to 9 for separating or electrically connect the two parts (2; 3) of the three-phase electrical circuit;
le dispositif de sectionnement étant situé dans le premier compartiment et l'appareillage électrique étant situé dans le deuxième compartiment, le dispositif de commande du dispositif de sectionnement traversant l'ouverture (25).  the disconnecting device being located in the first compartment and the electrical equipment being located in the second compartment, the control device of the disconnecting device passing through the opening (25).
11. Poste électrique à isolation gazeuse selon la revendication 10, dans lequel le deuxième compartiment est disposé au-dessus du premier compartiment et la cloison (7) est essentiellement horizontale, et dans lequel le dispositif de commande (100) est un arbre et est disposé de manière essentiellement parallèle à la cloison (7), de préférence dans une partie basse du premier compartiment . The gas-insulated electrical station according to claim 10, wherein the second compartment is disposed above the first compartment. compartment and the partition (7) is substantially horizontal, and wherein the control device (100) is a shaft and is arranged substantially parallel to the partition (7), preferably in a lower part of the first compartment.
12. Poste électrique à isolation gazeuse selon la revendication 10 ou 11, dans lequel l'élément de connexion électrique (9) de la première partie (2) du circuit incluant l'appareillage électrique est monté sur la cloison (7) séparant le premier et le deuxième compartiment, cette cloison étant en un matériau diélectrique et étant disposée au-dessus de chaque paire de contacts (20) du dispositif de sectionnement (1) · 12. Gas-insulated electrical substation according to claim 10 or 11, wherein the electrical connection element (9) of the first part (2) of the circuit including the electrical equipment is mounted on the partition (7) separating the first and the second compartment, this partition being made of a dielectric material and being disposed above each pair of contacts (20) of the disconnecting device (1).
13. Poste électrique à isolation gazeuse selon l'une quelconque des revendications 10 à 12, comportant un palier de guidage en rotation (18) du dispositif de commande (100), ledit palier étant situé dans l'ouverture (25) de la paroi de l'enceinte entre le dispositif de commande et la paroi et étant muni, sur sa surface de contact avec la paroi de l'enceinte et sur sa surface de contact avec la paroi du dispositif de commande, de moyens d'étanchéité (26) . 13. Gas-insulated electrical station according to any one of claims 10 to 12, comprising a rotational guide bearing (18) of the control device (100), said bearing being located in the opening (25) of the wall of the enclosure between the control device and the wall and being provided, on its contact surface with the wall of the enclosure and on its contact surface with the wall of the control device, sealing means (26) .
PCT/EP2014/061138 2013-05-31 2014-05-28 Improved sectioning device and electrical substation with gas insulation comprising such a device WO2014191498A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1355002A FR3006497B1 (en) 2013-05-31 2013-05-31 IMPROVED DISCONNECT DEVICE AND ELECTRIC POSITION WITH GAS ISOLATION COMPRISING SUCH A DEVICE
FR1355002 2013-05-31

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2080311A5 (en) 1970-02-27 1971-11-12 Coq Nv
GB1255052A (en) * 1968-02-22 1971-11-24 Bbc Brown Boveri & Cie A high voltage, metal clad switching device
EP0008821A1 (en) 1978-09-04 1980-03-19 Coq B.V. Metal clad switchgear
FR2543731A1 (en) * 1983-03-28 1984-10-05 Bbc Brown Boveri & Cie HIGH VOLTAGE SWITCH
FR2870635A1 (en) 2004-05-18 2005-11-25 Areva T & D Ag DEVICE FOR DISCONNECTING ELECTRIC ENERGY.
JP2007250597A (en) 2006-03-13 2007-09-27 Nissin Electric Co Ltd Polyphase switch
EP2144261A1 (en) 2008-07-07 2010-01-13 AREVA T&D AG Cut-off device for separating or connecting two parts of an electric circuit, including a voltage transformer
WO2011085820A1 (en) * 2010-01-18 2011-07-21 Abb Technology Ag Encapsulation component having isolating switches for a gas-isolated switchgear

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1255052A (en) * 1968-02-22 1971-11-24 Bbc Brown Boveri & Cie A high voltage, metal clad switching device
FR2080311A5 (en) 1970-02-27 1971-11-12 Coq Nv
EP0008821A1 (en) 1978-09-04 1980-03-19 Coq B.V. Metal clad switchgear
FR2543731A1 (en) * 1983-03-28 1984-10-05 Bbc Brown Boveri & Cie HIGH VOLTAGE SWITCH
FR2870635A1 (en) 2004-05-18 2005-11-25 Areva T & D Ag DEVICE FOR DISCONNECTING ELECTRIC ENERGY.
JP2007250597A (en) 2006-03-13 2007-09-27 Nissin Electric Co Ltd Polyphase switch
EP2144261A1 (en) 2008-07-07 2010-01-13 AREVA T&D AG Cut-off device for separating or connecting two parts of an electric circuit, including a voltage transformer
WO2011085820A1 (en) * 2010-01-18 2011-07-21 Abb Technology Ag Encapsulation component having isolating switches for a gas-isolated switchgear

Also Published As

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FR3006497B1 (en) 2016-12-30
FR3006497A1 (en) 2014-12-05

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