EP2774159B1 - Electrical appliance comprising means for limiting the formation of an electric arc - Google Patents

Electrical appliance comprising means for limiting the formation of an electric arc Download PDF

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Publication number
EP2774159B1
EP2774159B1 EP12779073.1A EP12779073A EP2774159B1 EP 2774159 B1 EP2774159 B1 EP 2774159B1 EP 12779073 A EP12779073 A EP 12779073A EP 2774159 B1 EP2774159 B1 EP 2774159B1
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EP
European Patent Office
Prior art keywords
contact
switchgear
rod
upstream
corona
Prior art date
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Active
Application number
EP12779073.1A
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German (de)
French (fr)
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EP2774159A1 (en
Inventor
Guilhem Blanchet
Bernard Gelloz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
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Alstom Technology AG
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Publication date
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Publication of EP2774159A1 publication Critical patent/EP2774159A1/en
Application granted granted Critical
Publication of EP2774159B1 publication Critical patent/EP2774159B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H01H33/245—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring using movable field electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/64—Protective enclosures, baffle plates, or screens for contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/045—Means for extinguishing or preventing arc between current-carrying parts for arcs formed during closing

Definitions

  • the invention provides an electrical apparatus for a high voltage electrical power transmission line, such as an earthing switch, a disconnector or a circuit breaker, including means for delaying the moment of appearance of an arc. during a closing phase of the electrical equipment and to limit the duration of such an arc during a closing phase or opening of the electrical equipment.
  • a high voltage electrical power transmission line such as an earthing switch, a disconnector or a circuit breaker
  • An electrical apparatus for a high-voltage electrical power transmission line such as, for example, an earthing switch (MALT) for a high voltage transmission line is a security device which aims to establish a connection between live parts, which may be at a certain electrical potential whose value varies from volts to kilovolt, and the earth which is at an electrical potential considered as zero.
  • MALT earthing switch
  • the electrical equipment comprises a fixed contact and a movable contact, which are able to be brought into contact or to be separated, according to whether one wants to establish or not an electrical connection between the two parts under tension.
  • the fixed contact is electrically connected to the live parts and the movable contact is electrically connected to the ground which is at zero potential.
  • the fixed contact and the movable contact are each electrically connected to the live parts of the apparatus.
  • the equipment also comprises a closed enclosure in which the fixed and mobile contacts are received, and the enclosure is filled with an electrically insulating gas such as for example sulfur hexafluoride SF6 or a gaseous mixture under pressure, allowing limit the formation of the electric arc.
  • an electrically insulating gas such as for example sulfur hexafluoride SF6 or a gaseous mixture under pressure
  • the fixed contact consists of a generally tubular element, commonly called “tulip”, in which the movable contact, consisting of an axial rod, is received.
  • the tulip may consist of a plurality of conductive lamellae extending parallel to the main axis of the apparatus, and whose free ends are folded radially towards the inside of the tulip, so that when the movable contact is inserted in the tulip, the lamellae deform elastically outwards.
  • the movable contact further consists of a rod, which may be solid or tubular, whose end is shaped tip or is angular to facilitate its connection with the fixed contact.
  • the particular form of the contacts in particular the angular shape of the end of the moving contact, favors the concentration of the electric charge of the moving contact at points or peaks thus formed, so that the electric arc is formed while the moving contact is still far from the fixed contact.
  • the risk of electrical "breakdown" and consequently the duration of the electric arc are relatively high compared to the total duration of a closing phase of the apparatus.
  • the electric arc causes significant wear of the fixed and movable contacts, it is therefore preferable to limit the duration of appearance of the arc to reduce the erosion of the fixed and movable contacts caused by the electric arc, as well as the pollution of the equipment, which increases the service life of the equipment.
  • the object of the invention is to propose electrical equipment for a transmission line of high-voltage current, which comprises means for delaying the instant of appearance of the arc, that is to say for the arc is formed or cuts at a close relative position of the contacts.
  • the document FR2344987 discloses a device according to the preamble of claim 1.
  • the invention proposes a high-voltage apparatus of main axis A having a longitudinal longitudinal contact, which is arranged at an upstream end of the apparatus and a movable contact which is arranged at a downstream end of the apparatus, which is movable.
  • the movable contact comprises an upstream axial rod whose upstream axial end is able to come into contact with the fixed contact, characterized in that the movable contact carries a corona-shielding component projecting radially from the upstream end of the rod, and an upstream face of the corona component, which is situated axially opposite the fixed contact. is smooth.
  • corona shielding element at the upstream end of the rod makes it possible to distribute the electric charge of the movable contact more evenly over a large area. Also, the presence of the corona shield limits the frequency of electrical breakdowns and also the duration of formation of an electric arc.
  • the corona shield consists of a cap projecting radially from the upstream end of the rod.
  • the corona cover is located axially recessed downstream from the upstream end of the rod.
  • the corona bonnet is of convex shape convex upstream.
  • the corona bonnet is mounted to slide axially on the rod and the bonnet and the rod comprise means for securing the bonnet with the rod in a disengageable manner so that the bonnet is integral with the rod moving upstream. up to an intermediate position and the rod moves upstream independently of the baffle cover beyond this intermediate position.
  • the securing means of the cover with the rod consist of a groove made in the rod and an elastic ring carried by the cover which is adapted to be received in the groove for securing the cover with the rod disengageably.
  • the fixed contact comprises a generally tubular element open downstream in which the upstream end of the rod is adapted to be received.
  • the upstream end of the rod carries a generally tubular element open towards the upstream
  • the fixed contact consists of a rod which is adapted to be received in said tubular element when the fixed contact is in contact with the movable contact.
  • the corona cover is located axially recessed downstream with respect to said tubular element.
  • the generally tubular element forms a tulip comprising a plurality of axial metal blades distributed circumferentially about the longitudinal main axis A.
  • the corona cover is adapted to come into contact with the fixed contact when the stationary contact is in contact with the movable contact.
  • the corona cover is at a distance from the fixed contact when the stationary contact is in contact with the movable contact.
  • an electrical apparatus 10 for a high-voltage electric power transmission line which here consists of an earthing switch.
  • the invention is not limited to an earthing switch and the apparatus 10 may be of any other type such as for example a disconnector or a circuit breaker.
  • the function of the earthing switch 10 is to electrically connect the live parts of an electric power line, which are at a certain electric potential, to earth, which is at a zero electric potential, in order to allow safe intervention on these parts of the transmission line.
  • the apparatus 10 consists of a generally elongate element of main axis A which is here oriented longitudinally.
  • the apparatus 10 comprises a fixed contact 12 which is arranged at an upstream axial end of the apparatus 10 with respect to the main axis A, here the left axial end in the figures, and which is connected to the live parts of FIG. the electric power line
  • the apparatus 10 also comprises a movable contact 22 which is arranged at the downstream axial end of the apparatus 10, here the right end, and which is here connected to the ground.
  • the fixed contact 12 comprises orifices 16 for connection to conductors of the current-carrying line and comprises a portion 14 of contact with the moving contact 22, which is oriented downstream.
  • the movable contact 22 is positioned axially vis-à-vis the contact portion 14 of the fixed contact 12 and it mainly comprises an axial rod 26 which extends axially upstream and whose upstream end 26a is adapted to come into permanent contact with the fixed contact 12.
  • rod will be used to designate both a solid rod that a hollow or tubular rod.
  • the apparatus 10 also comprises a fixed body 20 connected to the earth through which the movable contact 22 is guided in axial translation.
  • the movable contact 22 is electrically connected to the fixed body 20, for its connection to the ground.
  • the electrical connection between the movable contact 22 and the fixed contact 12 is effected by means of a generally annular component 30 which is commonly called “tulip" and in which an associated finger 32 is received.
  • the tulip 30 consists of a plurality of axial blades, that is to say parallel to the axis main A, which are distributed circumferentially around the longitudinal main axis A, forming a generally tubular element.
  • each lamella is located at a radial dimension with respect to the main axis A which is less than the outer radius of the finger 32.
  • the lamellae Due to their elastic deformation, the lamellae rest radially on the finger, thus maintaining an effective electrical contact.
  • the fixed contact 12 is electrically connected to the live parts of the power line and the movable contact 22 is electrically connected to earth, which is at zero electrical potential.
  • the movable contact 22 is displaced axially upstream until it comes into contact with the contact portion 14 of the fixed contact 12.
  • the potential difference between the fixed contact 12 and the movable contact 22 has the consequence that an electric arc occurs between the movable contact 22 and the fixed contact 12.
  • the movable contact 22 carries a corona shield 34 which is located radially around the upstream end 26a of the rod 26.
  • This corona-shielding component is preferably mounted on the upstream end 26a of the rod 26.
  • the corona shielding element is made such that the electric charge of the movable contact 22 is not concentrated on the end of the rod 26 but is distributed over a certain surface, to limit the possibility of occurrence of an arc electric.
  • the corona shielding element 34 is made in such a way that it has an upstream face 36 facing the stationary contact 12 and this upstream face 36 is substantially smooth, that is to say that it has no roughness at which the electric charge of the moving contact could be concentrated.
  • an electric arc is formed when the distance between the movable contact 22 and the fixed contact 12 is reduced compared to an apparatus according to the state of the art.
  • the fixed contact 12 and the movable contact 22 are made so that the tulip 30 is fixed, and forms the fixed contact 12.
  • the finger 32 is then carried by the rod 26, then forming the movable contact 22.
  • the corona shielding component is carried by the movable contact 22 and consists of a plate 34 extending radially around the finger 32, forming a corona shield.
  • the corona shield 34 consists of a generally radial disk, which is coaxial with the longitudinal main axis A.
  • the cover 34 is positioned axially recessed downstream with respect to the finger 32.
  • the cover 34 is further of convex shape curved upstream.
  • the curvature of the cover 34 is for example defined so that the cover 34 forms a sphere portion.
  • the corona shielding member is in the form of a radial ring which is located around the finger 32 and at a radial distance therefrom.
  • the axial position of the cover 34 in particular the distance between the cover 34 and the upstream end of the finger and, where appropriate, the radius of curvature of the disc, are defined so that the distance between the cover 34 and the fixed assembly is substantially equal to the distance between the upstream end of the finger 32 and the tulip 30.
  • the axial position of the cover 34 is defined such that the cover 34 does not come into contact with the fixed contact 12 when the apparatus 10 is closed.
  • the axial position of the cover 34 is defined such that the cover 34 is in contact with the fixed contact 12 when the apparatus 10 is closed.
  • FIGS. 3 and 4 another embodiment of the invention in which the hood The corona shield 34 is able to move axially upstream integrally from the rod 26 to a predefined intermediate position beyond which only the rod 26 slides upstream, the corona cover 34 remaining stationary. .
  • the invention is not limited to a corona shield component consisting of a plate as shown, and that the corona shielding member may have any other design such as for example a ring as described above.
  • This intermediate position is defined in such a way that the corona cover is at a distance from the fixed contact 12 and so that this distance between the corona cover 34 and the fixed contact 12 is less than the distance from which the electric arc forms.
  • the corona bonnet 34 is mounted to slide axially along the rod 26.
  • the cap 34 and the rod 26 comprise means for securing the cap with the rod during axial sliding upstream to the intermediate position. .
  • These securing means are disengageable, to allow the rod 26 to slide upstream independently of the cover 34, when this intermediate position has been crossed.
  • the securing means consist of an annular groove 38 which is formed in the cylindrical wall of the rod 26 and an elastic ring 40 which is carried by the hood 34 whose dimensions of the elastic ring 40 are complementary dimensions of the groove 38.
  • the disengagement of the securing means is effected by exiting the elastic ring 40 out of the groove 38.
  • the apparatus 10 comprises needles 42 which are fixed to the cover 34 and which extend axially downstream from a downstream face of the cover 34.
  • the needles 42 are integral with the cover and they are movable in translation relative to the fixed body 20 connected to the ground.
  • each needle 42 is able to come into abutment upstream against an associated face of the fixed body 20 when the rod and the cover 34 are in the predefined intermediate position.
  • the needles 42 block the cover in translation beyond the intermediate position. Consequently, the elastic ring 40 is out of the groove 38 so that the rod 26 continues to move upstream, independently of the cover 34.
  • the rod moves downstream, thereby breaking the contact with the fixed contact 12.
  • the upstream end of the rod 26 has a shoulder 46 which is adapted to abut against the cover 34. Also, when the rod is in the extreme downstream position, the cover 34 is clamped axially between the upstream end 26a of the rod and the fixed body.
  • the relative positions of the bearing faces, the groove and the elastic ring are defined so that in the extreme downstream position shown in FIG. figure 3 , the cover 34 and the rod are in a relative position for which the elastic ring is water level of the groove 38.
  • FIG. 2 Another embodiment of the invention according to which the corona shielding component is formed by the tulip 30.
  • the tulip 30 is mounted on the free end 26a of the rod 26 so that it is open upstream.
  • the tulip 30 is carried by the movable contact 22 and the finger 32 is a part of the fixed contact 12.
  • each lamella constituting the tulip 30 has a free upstream end face which is located opposite the fixed contact 12.
  • the upstream end face of each lamella is generally smooth, it is that is to say, it has no roughness, as described above, and the joining of the faces forms a smooth upstream annular surface facing the fixed assembly 12.
  • the charge of the moving assembly 20 is thus distributed over this annular surface, at the level of which one or more electric arcs are able to form.
  • the tulip 30 and the cap 34 are both carried by the rod 26 so that the tulip 30 is mounted at the free end of the rod 26 and the cap 34 is located axially in position. downstream withdrawal from tulip 30.
  • the electrical charge of the moving assembly 20 is distributed over an even larger surface, further delaying the moment of appearance of the electric arc when closing the apparatus or reducing the duration of formation of the electric arc when opening the switchgear 10.
  • the invention has been described with reference to an apparatus 10 which consists of an earthing switch having a fixed contact 12 which is connected to the live parts of the electric power transmission line and having a movable contact 22 which is connected to the ground. It will be understood that the invention is not limited to an earthing switch and that the switchgear 10 may be any other high voltage line switchgear such as a high voltage switch or line breaker.

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  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

DOMAINE TECHNIQUETECHNICAL AREA

L'invention propose un appareillage électrique pour une ligne de transport de courant électrique à haute tension, tel qu'un sectionneur de mise à la terre, un sectionneur ou un disjoncteur, comportant des moyens pour retarder le moment d'apparition d'un arc électrique lors d'une phase de fermeture de l'appareillage électrique et pour limiter la durée d'un tel arc lors d'une phase de fermeture ou d'ouverture de l'appareillage électrique.The invention provides an electrical apparatus for a high voltage electrical power transmission line, such as an earthing switch, a disconnector or a circuit breaker, including means for delaying the moment of appearance of an arc. during a closing phase of the electrical equipment and to limit the duration of such an arc during a closing phase or opening of the electrical equipment.

ÉTAT DE LA TECHNIQUE ANTÉRIEURESTATE OF THE PRIOR ART

Un appareillage électrique pour une ligne de transport de courant électrique à haute tension tel que par exemple un sectionneur de mise à la terre (MALT) pour une ligne de transport à haute tension est un appareil de sécurité qui a pour but d'établir une connexion électrique entre des parties sous tension, qui peuvent être à un certain potentiel électrique dont la valeur varie depuis le volt jusqu'au kilovolt, et la terre qui est à un potentiel électrique considéré comme nul.An electrical apparatus for a high-voltage electrical power transmission line such as, for example, an earthing switch (MALT) for a high voltage transmission line is a security device which aims to establish a connection between live parts, which may be at a certain electrical potential whose value varies from volts to kilovolt, and the earth which is at an electrical potential considered as zero.

L'appareillage électrique comporte un contact fixe et un contact mobile, qui sont aptes à être mis en contact ou à être séparés, selon que l'on veut établir ou non une connexion électrique entre les deux parties sous tension.The electrical equipment comprises a fixed contact and a movable contact, which are able to be brought into contact or to be separated, according to whether one wants to establish or not an electrical connection between the two parts under tension.

Par exemple, pour un sectionneur de mise à la terre, le contact fixe est raccordé électriquement aux parties sous tension et le contact mobile est raccordé électriquement à la terre qui est à un potentiel nul.For example, for an earthing switch, the fixed contact is electrically connected to the live parts and the movable contact is electrically connected to the ground which is at zero potential.

De même, pour un sectionneur ou un disjoncteur, le contact fixe et le contact mobile sont chacun raccordés électriquement aux parties sous tension de l'appareillage.Similarly, for a disconnector or a circuit breaker, the fixed contact and the movable contact are each electrically connected to the live parts of the apparatus.

Lors de la fermeture de l'appareillage électrique, du fait de la différence de potentiel entre le contact fixe et le contact mobile, un arc électrique se forme entre les deux contacts.When closing the electrical equipment, because of the potential difference between the fixed contact and the moving contact, an electric arc is formed between the two contacts.

L'appareillage comporte aussi une enceinte fermée dans laquelle les contacts fixe et mobile sont reçus, et l'enceinte est remplie d'un gaz isolant électriquement tel que par exemple de l'hexafluorure de soufre SF6 ou un mélange gazeux sous pression, permettant de limiter la formation de l'arc électrique.The equipment also comprises a closed enclosure in which the fixed and mobile contacts are received, and the enclosure is filled with an electrically insulating gas such as for example sulfur hexafluoride SF6 or a gaseous mixture under pressure, allowing limit the formation of the electric arc.

Selon un mode de réalisation conventionnel, le contact fixe consiste en un élément globalement tubulaire, communément appelé "tulipe", dans lequel le contact mobile, consistant en une tige axiale, est reçu.According to a conventional embodiment, the fixed contact consists of a generally tubular element, commonly called "tulip", in which the movable contact, consisting of an axial rod, is received.

La tulipe peut consister en une pluralité de lamelles conductrices s'étendant parallèlement à l'axe principal de l'appareillage, et dont les extrémités libres sont repliées radialement vers l'intérieur de la tulipe, de manière telle que lorsque le contact mobile est inséré dans la tulipe, les lamelles se déforment élastiquement vers l'extérieur.The tulip may consist of a plurality of conductive lamellae extending parallel to the main axis of the apparatus, and whose free ends are folded radially towards the inside of the tulip, so that when the movable contact is inserted in the tulip, the lamellae deform elastically outwards.

Le contact mobile consiste en outre en une tige, qui peut être pleine ou tubulaire, dont l'extrémité est en forme de pointe ou est de forme anguleuse pour faciliter son raccordement avec le contact fixe.The movable contact further consists of a rod, which may be solid or tubular, whose end is shaped tip or is angular to facilitate its connection with the fixed contact.

Lors de la fermeture de l'appareillage, la forme particulière des contacts, notamment la forme anguleuse de l'extrémité du contact mobile, favorise la concentration de la charge électrique du contact mobile au niveau de pointes ou pics ainsi formés, de sorte que l'arc électrique se forme alors que le contact mobile est encore éloigné du contact fixe.When the apparatus is closed, the particular form of the contacts, in particular the angular shape of the end of the moving contact, favors the concentration of the electric charge of the moving contact at points or peaks thus formed, so that the electric arc is formed while the moving contact is still far from the fixed contact.

Ainsi, le risque de "claquage" électrique et par conséquent la durée de l'arc électrique sont relativement importants par rapport à la durée totale d'une phase de fermeture de l'appareillage. L'arc électrique provoque une usure importante des contacts fixe et mobile, il est donc préférable de limiter la durée d'apparition de l'arc afin de diminuer l'érosion des contacts fixe et mobile provoquée par l'arc électrique, ainsi que la pollution de l'appareillage, ce qui permet d'augmenter la durée de vie de l'appareillage.Thus, the risk of electrical "breakdown" and consequently the duration of the electric arc are relatively high compared to the total duration of a closing phase of the apparatus. The electric arc causes significant wear of the fixed and movable contacts, it is therefore preferable to limit the duration of appearance of the arc to reduce the erosion of the fixed and movable contacts caused by the electric arc, as well as the pollution of the equipment, which increases the service life of the equipment.

Pour réduire la durée de l'arc électrique, il a été proposé d'augmenter la vitesse de déplacement du contact mobile. Cependant, cela implique de concevoir des moyens d'entraînement de grandes dimensions, augmentant par conséquent les coûts de l'appareillage.To reduce the duration of the electric arc, it has been proposed to increase the moving speed of the moving contact. However, this involves designing large drive means, thus increasing the cost of fitting.

L'invention a pour but de proposer un appareillage électrique pour une ligne de transport de courant à haute tension, qui comporte des moyens permettant de retarder l'instant d'apparition de l'arc, c'est-à-dire pour que l'arc se forme ou se coupe à une position relative rapprochée des contacts.The object of the invention is to propose electrical equipment for a transmission line of high-voltage current, which comprises means for delaying the instant of appearance of the arc, that is to say for the arc is formed or cuts at a close relative position of the contacts.

Le document FR2344987 divulgue un dispositif selon le préambule de la revendication 1.The document FR2344987 discloses a device according to the preamble of claim 1.

EXPOSÉ DE L'INVENTIONSTATEMENT OF THE INVENTION

L'invention propose un appareillage à haute tension d'axe principal A longitudinal, comportant un contact fixe qui est agencé à une extrémité amont de l'appareillage et un contact mobile qui est agencé à une extrémité aval de l'appareillage, qui est mobile dans l'appareillage entre une position amont de fermeture de l'appareillage dans laquelle le contact mobile est connecté au contact fixe et une position aval d'ouverture de l'appareillage dans laquelle le contact mobile est déconnecté du contact fixe,
dans lequel le contact mobile comporte une tige axiale s'étendant vers l'amont dont l'extrémité axiale amont est apte à venir en contact avec le contact fixe,
caractérisé en ce que le contact mobile porte un composant pare-effluves faisant saillie radialement par rapport à l'extrémité amont de la tige, et dont une face amont du composant pare effluves, qui est située axialement en vis-à-vis du contact fixe est lisse.The invention proposes a high-voltage apparatus of main axis A having a longitudinal longitudinal contact, which is arranged at an upstream end of the apparatus and a movable contact which is arranged at a downstream end of the apparatus, which is movable. in the apparatus between an upstream position of closure of the apparatus in which the movable contact is connected to the fixed contact and a downstream opening position of the apparatus in which the movable contact is disconnected from the fixed contact,
in which the movable contact comprises an upstream axial rod whose upstream axial end is able to come into contact with the fixed contact,
characterized in that the movable contact carries a corona-shielding component projecting radially from the upstream end of the rod, and an upstream face of the corona component, which is situated axially opposite the fixed contact. is smooth.

La présence du composant pare-effluves au niveau de l'extrémité amont de la tige permet de répartir de manière plus homogène la charge électrique du contact mobile sur une surface importante. Aussi, la présence du pare-effluves limite la fréquence des claquages électriques et aussi la durée de formation d'un arc électrique.The presence of the corona shielding element at the upstream end of the rod makes it possible to distribute the electric charge of the movable contact more evenly over a large area. Also, the presence of the corona shield limits the frequency of electrical breakdowns and also the duration of formation of an electric arc.

De préférence, le composant pare-effluves consiste en un capot faisant saillie radialement par rapport à l'extrémité amont de la tige.Preferably, the corona shield consists of a cap projecting radially from the upstream end of the rod.

De préférence, le capot pare effluves est situé axialement en retrait vers l'aval par rapport à l'extrémité amont de la tige.Preferably, the corona cover is located axially recessed downstream from the upstream end of the rod.

De préférence, le capot pare effluves est de forme convexe bombé vers l'amont.Preferably, the corona bonnet is of convex shape convex upstream.

De préférence, le capot pare effluves est monté coulissant axialement sur la tige et le capot et la tige comportent des moyens de solidarisation du capot avec la tige de manière débrayable de manière telle que le capot est solidaire de la tige en déplacement vers l'amont jusqu'à une position intermédiaire et la tige se déplace vers l'amont indépendamment du capot pare effluves au-delà de cette position intermédiaire.Preferably, the corona bonnet is mounted to slide axially on the rod and the bonnet and the rod comprise means for securing the bonnet with the rod in a disengageable manner so that the bonnet is integral with the rod moving upstream. up to an intermediate position and the rod moves upstream independently of the baffle cover beyond this intermediate position.

De préférence, les moyens de solidarisation du capot avec la tige consistent en une gorge réalisée dans la tige et un anneau élastique porté par le capot qui est apte à être reçu dans la gorge pour la solidarisation du capot avec la tige de manière débrayable.Preferably, the securing means of the cover with the rod consist of a groove made in the rod and an elastic ring carried by the cover which is adapted to be received in the groove for securing the cover with the rod disengageably.

De préférence, le contact fixe comporte un élément globalement tubulaire ouvert vers l'aval dans lequel l'extrémité amont de la tige est apte à être reçue.Preferably, the fixed contact comprises a generally tubular element open downstream in which the upstream end of the rod is adapted to be received.

De préférence, l'extrémité amont de la tige porte un élément globalement tubulaire ouvert vers l'amont, et le contact fixe consiste en une tige qui est apte à être reçue dans ledit élément tubulaire lorsque le contact fixe est en contact avec le contact mobile.Preferably, the upstream end of the rod carries a generally tubular element open towards the upstream, and the fixed contact consists of a rod which is adapted to be received in said tubular element when the fixed contact is in contact with the movable contact.

De préférence, le capot pare effluves est situé axialement en retrait vers l'aval par rapport audit élément tubulaire.Preferably, the corona cover is located axially recessed downstream with respect to said tubular element.

De préférence, l'élément globalement tubulaire forme une tulipe comportant une pluralité de lamelles axiales métalliques réparties de manière circonférentielle autour de l'axe principal A longitudinal.Preferably, the generally tubular element forms a tulip comprising a plurality of axial metal blades distributed circumferentially about the longitudinal main axis A.

De préférence, le capot pare effluves est apte à venir en contact avec le contact fixe lorsque le contact fixe est en contact avec le contact mobile.Preferably, the corona cover is adapted to come into contact with the fixed contact when the stationary contact is in contact with the movable contact.

De préférence, le capot pare effluves est à distance du contact fixe lorsque le contact fixe est en contact avec le contact mobile.Preferably, the corona cover is at a distance from the fixed contact when the stationary contact is in contact with the movable contact.

BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :

  • la figure 1 est une section axiale d'un appareillage selon un premier mode de réalisation de l'invention ;
  • la figure 2 est une section axiale d'un appareillage selon un deuxième mode de réalisation de l'invention ;
  • les figures 3 et 4 sont une section axiale d'un appareillage selon un troisième mode de réalisation de l'invention montrant l'appareillage en position fermée et ouverte, respectivement.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • the figure 1 is an axial section of an apparatus according to a first embodiment of the invention;
  • the figure 2 is an axial section of an apparatus according to a second embodiment of the invention;
  • the Figures 3 and 4 are an axial section of an apparatus according to a third embodiment of the invention showing the apparatus in the closed and open position, respectively.

EXPOSÉ DÉTAILLÉ DE MODES DE RÉALISATION PARTICULIERSDETAILED PRESENTATION OF PARTICULAR EMBODIMENTS

On a représenté aux figures un appareillage électrique 10 pour une ligne de transport de courant électrique à haute tension, qui consiste ici en un sectionneur de mise à la terre.There is shown in the figures an electrical apparatus 10 for a high-voltage electric power transmission line, which here consists of an earthing switch.

Il sera compris que l'invention n'est pas limitée à un sectionneur de mise à la terre et que l'appareillage 10 peut être de tout autre type tel que par exemple un sectionneur ou un disjoncteur.It will be understood that the invention is not limited to an earthing switch and the apparatus 10 may be of any other type such as for example a disconnector or a circuit breaker.

Le sectionneur de mise à la terre 10 a pour fonction de raccorder électriquement des parties sous tensions d'une ligne de transport de courant électrique, qui sont à un certain potentiel électrique, à la terre, qui est à un potentiel électrique nul, afin de permettre une intervention sans risques sur ces parties de la ligne de transport.The function of the earthing switch 10 is to electrically connect the live parts of an electric power line, which are at a certain electric potential, to earth, which is at a zero electric potential, in order to allow safe intervention on these parts of the transmission line.

L'appareillage 10 consiste en un élément de forme générale allongée d'axe principal A qui est ici orienté longitudinalement.The apparatus 10 consists of a generally elongate element of main axis A which is here oriented longitudinally.

L'appareillage 10 comporte un contact fixe 12 qui est agencé à une extrémité axiale amont de l'appareillage 10 par rapport à l'axe principal A, ici l'extrémité axiale de gauche aux figures, et qui est raccordé aux parties sous tension de la ligne de transport de courant électriqueThe apparatus 10 comprises a fixed contact 12 which is arranged at an upstream axial end of the apparatus 10 with respect to the main axis A, here the left axial end in the figures, and which is connected to the live parts of FIG. the electric power line

L'appareillage 10 comporte aussi un contact mobile 22 qui est agencé à l'extrémité axiale aval de l'appareillage 10, ici l'extrémité de droite, et qui est ici raccordé à la terre.The apparatus 10 also comprises a movable contact 22 which is arranged at the downstream axial end of the apparatus 10, here the right end, and which is here connected to the ground.

Le contact fixe 12 comporte des orifices 16 de liaison à des conducteurs de la ligne de transport de courant et comporte une portion 14 de contact avec le contact mobile 22, qui est orienté vers l'aval.The fixed contact 12 comprises orifices 16 for connection to conductors of the current-carrying line and comprises a portion 14 of contact with the moving contact 22, which is oriented downstream.

Le contact mobile 22 est positionné axialement en vis-à-vis de la portion de contact 14 du contact fixe 12 et il comporte principalement une tige axiale 26 qui s'étend axialement vers l'amont et dont l'extrémité amont 26a est apte à venir en contact permanent avec le contact fixe 12.The movable contact 22 is positioned axially vis-à-vis the contact portion 14 of the fixed contact 12 and it mainly comprises an axial rod 26 which extends axially upstream and whose upstream end 26a is adapted to come into permanent contact with the fixed contact 12.

Dans la description de l'invention qui va suivre, le terme "tige" sera utilisé pour désigner aussi bien une tige pleine qu'une tige creuse ou tubulaire.In the description of the invention which follows, the term "rod" will be used to designate both a solid rod that a hollow or tubular rod.

L'appareillage 10 comporte aussi un corps fixe 20 raccordé à la terre par l'intermédiaire duquel le contact mobile 22 est guidé en translation axiale.The apparatus 10 also comprises a fixed body 20 connected to the earth through which the movable contact 22 is guided in axial translation.

Le contact mobile 22 est raccordé électriquement au corps fixe 20, pour son raccordement à la terre.The movable contact 22 is electrically connected to the fixed body 20, for its connection to the ground.

Le raccordement électrique ente le contact mobile 22 et le contact fixe 12 s'effectue par l'intermédiaire d'un composant 30 globalement annulaire qui est communément appelé "tulipe" et dans lequel un doigt 32 associé est reçu.The electrical connection between the movable contact 22 and the fixed contact 12 is effected by means of a generally annular component 30 which is commonly called "tulip" and in which an associated finger 32 is received.

La tulipe 30 est constituée d'une pluralité de lamelles axiales, c'est-à-dire parallèles à l'axe principal A, qui sont réparties de manière circonférentielle autour de l'axe principal A longitudinal, en formant un élément globalement tubulaire.The tulip 30 consists of a plurality of axial blades, that is to say parallel to the axis main A, which are distributed circumferentially around the longitudinal main axis A, forming a generally tubular element.

L'extrémité axiale libre de chaque lamelle est située à une cote radiale par rapport à l'axe principal A qui est inférieure au rayon externe du doigt 32. Ainsi, lorsque le doigt 32 est reçu dans la tulipe 30, les lamelles se déforment élastiquement et radialement.The free axial end of each lamella is located at a radial dimension with respect to the main axis A which is less than the outer radius of the finger 32. Thus, when the finger 32 is received in the tulip 30, the lamellae deform elastically and radially.

Du fait de leur déformation élastique, les lamelles s'appuient radialement sur le doigt, maintenant ainsi un contact électrique efficace.Due to their elastic deformation, the lamellae rest radially on the finger, thus maintaining an effective electrical contact.

Comme on l'a dit plus haut, le contact fixe 12 est raccordé électriquement aux parties sous tension de la ligne de transport de courant et le contact mobile 22 est raccordé électriquement à la terre, qui est à un potentiel électrique nul.As mentioned above, the fixed contact 12 is electrically connected to the live parts of the power line and the movable contact 22 is electrically connected to earth, which is at zero electrical potential.

Lors d'une opération de fermeture de l'appareillage 10, le contact mobile 22 est déplacé axialement vers l'amont jusqu'à venir en contact avec la portion de contact 14 du contact fixe 12.During a closing operation of the apparatus 10, the movable contact 22 is displaced axially upstream until it comes into contact with the contact portion 14 of the fixed contact 12.

A une position intermédiaire du contact mobile 22, la différence de potentiel entre le contact fixe 12 et le contact mobile 22 a pour conséquence qu'un arc électrique se produit entre contact mobile 22 et le contact fixe 12.At an intermediate position of the movable contact 22, the potential difference between the fixed contact 12 and the movable contact 22 has the consequence that an electric arc occurs between the movable contact 22 and the fixed contact 12.

Il en est de même lors d'une opération d'ouverture de l'appareillage 10.It is the same during an opening operation of the apparatus 10.

Selon l'invention, le contact mobile 22 porte un composant pare-effluves 34 qui est situé radialement autour de l'extrémité amont 26a de la tige 26. Ce composant pare-effluves est de préférence monté sur l'extrémité amont 26a de la tige 26.According to the invention, the movable contact 22 carries a corona shield 34 which is located radially around the upstream end 26a of the rod 26. This corona-shielding component is preferably mounted on the upstream end 26a of the rod 26.

Le composant pare-effluves est réalisé de manière telle que la charge électrique du contact mobile 22 n'est pas concentrée sur l'extrémité de la tige 26 mais est répartie sur une certaine surface, pour limiter la possibilité d'apparition d'un arc électrique.The corona shielding element is made such that the electric charge of the movable contact 22 is not concentrated on the end of the rod 26 but is distributed over a certain surface, to limit the possibility of occurrence of an arc electric.

Aussi, le composant pare-effluves 34 est réalisé de manière telle qu'il comporte une face amont 36 située en vis-à-vis du contact fixe 12 et cette face amont 36 est sensiblement lisse, c'est-à-dire qu'elle ne comporte aucune aspérité au niveau de laquelle la charge électrique du contact mobile pourrait se concentrer.Also, the corona shielding element 34 is made in such a way that it has an upstream face 36 facing the stationary contact 12 and this upstream face 36 is substantially smooth, that is to say that it has no roughness at which the electric charge of the moving contact could be concentrated.

Ainsi, un arc électrique se forme lorsque la distance entre le contact mobile 22 et le contact fixe 12, est réduite par rapport à un appareillage selon l'état de la technique.Thus, an electric arc is formed when the distance between the movable contact 22 and the fixed contact 12 is reduced compared to an apparatus according to the state of the art.

Selon un premier mode de réalisation de l'invention représenté à la figure 1, le contact fixe 12 et le contact mobile 22 sont réalisés de manière que la tulipe 30 est fixe, et forme le contact fixe 12. Le doigt 32 est alors porté par la tige 26, formant alors le contact mobile 22.According to a first embodiment of the invention shown in figure 1 the fixed contact 12 and the movable contact 22 are made so that the tulip 30 is fixed, and forms the fixed contact 12. The finger 32 is then carried by the rod 26, then forming the movable contact 22.

Selon ce premier mode de réalisation et conformément à l'invention, le composant pare-effluves est porté par le contact mobile 22 et consiste en une plaque 34 s'étendant radialement autour du doigt 32, formant un capot pare-effluves.According to this first embodiment and according to the invention, the corona shielding component is carried by the movable contact 22 and consists of a plate 34 extending radially around the finger 32, forming a corona shield.

Ici, le capot pare-effluves 34 consiste en un disque globalement radial, qui est coaxial à l'axe principal A longitudinal.Here, the corona shield 34 consists of a generally radial disk, which is coaxial with the longitudinal main axis A.

Le capot 34 est positionné axialement en retrait vers l'aval par rapport au doigt 32.The cover 34 is positioned axially recessed downstream with respect to the finger 32.

Selon un mode de réalisation préféré, le capot 34 est en outre de forme convexe bombé vers l'amont. La courbure du capot 34 est par exemple définie de manière telle que le capot 34 forme une portion de sphère.According to a preferred embodiment, the cover 34 is further of convex shape curved upstream. The curvature of the cover 34 is for example defined so that the cover 34 forms a sphere portion.

Selon une variante de réalisation (non représentée), le composant pare-effluves est en forme d'un anneau radial qui est situé autour du doigt 32 et à distance radiale de celui-ci.According to an alternative embodiment (not shown), the corona shielding member is in the form of a radial ring which is located around the finger 32 and at a radial distance therefrom.

La position axiale du capot 34, notamment la distance entre le capot 34 et l'extrémité amont du doigt et, le cas échéant, le rayon de courbure du disque, sont définis de manière que la distance entre le capot 34 et l'ensemble fixe est sensiblement égale à la distance entre l'extrémité amont du doigt 32 et la tulipe 30.The axial position of the cover 34, in particular the distance between the cover 34 and the upstream end of the finger and, where appropriate, the radius of curvature of the disc, are defined so that the distance between the cover 34 and the fixed assembly is substantially equal to the distance between the upstream end of the finger 32 and the tulip 30.

Selon un premier mode de réalisation, la position axiale du capot 34 est définie de manière telle que le capot 34 ne vient pas en contact avec le contact fixe 12 lorsque l'appareillage 10 est fermé.According to a first embodiment, the axial position of the cover 34 is defined such that the cover 34 does not come into contact with the fixed contact 12 when the apparatus 10 is closed.

Selon un deuxième mode de réalisation, la position axiale du capot 34 est définie de manière telle que le capot 34 est en contact avec le contact fixe 12 lorsque l'appareillage 10 est fermé.According to a second embodiment, the axial position of the cover 34 is defined such that the cover 34 is in contact with the fixed contact 12 when the apparatus 10 is closed.

On a représenté aux figures 3 et 4 un autre mode de réalisation de l'invention dans lequel le capot pare-effluves 34 est apte à se déplacer axialement vers l'amont de manière solidaire de la tige 26 jusqu'à une position intermédiaire prédéfinie au-delà de laquelle seule la tige 26 coulisse vers l'amont, le capot pare effluves 34 restant immobile.Representatives Figures 3 and 4 another embodiment of the invention in which the hood The corona shield 34 is able to move axially upstream integrally from the rod 26 to a predefined intermediate position beyond which only the rod 26 slides upstream, the corona cover 34 remaining stationary. .

Il sera compris que l'invention n'est pas limitée à un composant pare-effluves consistant en une plaque telle que représentée, et que le composant pare-effluves peut avoir toute autre conception telle que par exemple un anneau tel que décrit précédemment.It will be understood that the invention is not limited to a corona shield component consisting of a plate as shown, and that the corona shielding member may have any other design such as for example a ring as described above.

Cette position intermédiaire est définie de manière telle que le capot pare effluves est à distance du contact fixe 12 et de manière que cette distance entre le capot pare effluves 34 et le contact fixe 12 est inférieure à la distance à partir de laquelle l'arc électrique se forme.This intermediate position is defined in such a way that the corona cover is at a distance from the fixed contact 12 and so that this distance between the corona cover 34 and the fixed contact 12 is less than the distance from which the electric arc forms.

Pour cela, le capot pare effluves 34 est monté coulissant axialement le long de la tige 26. Aussi, le capot 34 et la tige 26 comportent des moyens pour solidariser le capot avec la tige lors du coulissement axial vers l'amont vers la position intermédiaire.For this, the corona bonnet 34 is mounted to slide axially along the rod 26. Also, the cap 34 and the rod 26 comprise means for securing the cap with the rod during axial sliding upstream to the intermediate position. .

Ces moyens de solidarisation sont débrayables, pour permettre à la tige 26 de coulisser vers l'amont indépendamment du capot 34, lorsque cette position intermédiaire a été franchie.These securing means are disengageable, to allow the rod 26 to slide upstream independently of the cover 34, when this intermediate position has been crossed.

Ici, les moyens de solidarisation consistent en une gorge annulaire 38 qui est réalisée dans la paroi cylindrique de la tige 26 et un anneau élastique 40 qui est porté par le capot 34 dont les dimensions de l'anneau élastique 40 sont complémentaires des dimensions de la gorge 38.Here, the securing means consist of an annular groove 38 which is formed in the cylindrical wall of the rod 26 and an elastic ring 40 which is carried by the hood 34 whose dimensions of the elastic ring 40 are complementary dimensions of the groove 38.

Ainsi, lorsque l'anneau élastique 40 est reçu dans la gorge 38, le capot 34 est solidaire de la tige 26 en coulissement axialement.Thus, when the elastic ring 40 is received in the groove 38, the cover 34 is secured to the rod 26 in sliding axially.

Le débrayage des moyens de solidarisation s'effectue en sortant l'anneau élastique 40 hors de la gorge 38.The disengagement of the securing means is effected by exiting the elastic ring 40 out of the groove 38.

Pour cela, l'appareillage 10 comporte des aiguilles 42 qui sont fixées au capot 34 et qui s'étendent axialement vers l'aval depuis une face aval du capot 34.For this, the apparatus 10 comprises needles 42 which are fixed to the cover 34 and which extend axially downstream from a downstream face of the cover 34.

Les aiguilles 42 sont solidaires du capot et elles sont mobiles en translation par rapport au corps fixe 20 raccordé à la terre.The needles 42 are integral with the cover and they are movable in translation relative to the fixed body 20 connected to the ground.

L'extrémité aval 44 de chaque aiguille 42 est apte à venir en butée vers l'amont contre une face associée du corps fixe 20 lorsque la tige et le capot 34 sont dans la position intermédiaire prédéfinie.The downstream end 44 of each needle 42 is able to come into abutment upstream against an associated face of the fixed body 20 when the rod and the cover 34 are in the predefined intermediate position.

Ainsi, les aiguilles 42 bloquent le capot en translation au-delà de la position intermédiaire. Par conséquent, l'anneau élastique 40 est sorti de la gorge 38 de sorte que la tige 26 continue de se déplacer vers l'amont, indépendamment du capot 34.Thus, the needles 42 block the cover in translation beyond the intermediate position. Consequently, the elastic ring 40 is out of the groove 38 so that the rod 26 continues to move upstream, independently of the cover 34.

Lors d'une phase d'ouverture de l'appareillage 10, la tige se déplace vers l'aval, rompant alors le contact avec le contact fixe 12.During an opening phase of the apparatus 10, the rod moves downstream, thereby breaking the contact with the fixed contact 12.

Pour que l'anneau élastique 40 retourne dans sa position engagée dans la gorge 38, l'extrémité amont de la tige 26 comporte un épaulement 46 qui est apte à venir en butée contre le capot 34. Aussi, lorsque la tige est en position aval extrême, le capot 34 est serré axialement entre l'extrémité amont 26a de la tige et le corps fixe.So that the elastic ring 40 returns to its engaged position in the groove 38, the upstream end of the rod 26 has a shoulder 46 which is adapted to abut against the cover 34. Also, when the rod is in the extreme downstream position, the cover 34 is clamped axially between the upstream end 26a of the rod and the fixed body.

Les positions relatives des faces d'appui, de la gorge et de l'anneau élastique sont définies de manière que dans la position aval extrême représentée à la figure 3, le capot 34 et la tige sont dans une position relative pour laquelle l'anneau élastique est eau niveau de la gorge 38.The relative positions of the bearing faces, the groove and the elastic ring are defined so that in the extreme downstream position shown in FIG. figure 3 , the cover 34 and the rod are in a relative position for which the elastic ring is water level of the groove 38.

On a représenté à la figure 2 un autre mode de réalisation de l'invention selon lequel le composant pare-effluves est formé par la tulipe 30.We have shown figure 2 another embodiment of the invention according to which the corona shielding component is formed by the tulip 30.

Selon ce mode de réalisation, la tulipe 30 est montée sur l'extrémité libre 26a de la tige 26 de manière telle qu'elle est ouverte vers l'amont.According to this embodiment, the tulip 30 is mounted on the free end 26a of the rod 26 so that it is open upstream.

Ainsi, la tulipe 30 est portée par le contact mobile 22 et le doigt 32 est une partie du contact fixe 12.Thus, the tulip 30 is carried by the movable contact 22 and the finger 32 is a part of the fixed contact 12.

Selon ce mode de réalisation, chaque lamelle constituant la tulipe 30 comporte une face d'extrémité amont libre qui est située en vis-à-vis du contact fixe 12. La face d'extrémité amont de chaque lamelle est globalement lisse, c'est-à-dire qu'elle ne comporte aucune aspérité, comme décrit précédemment, et la réunion des faces forme une surface annulaire amont elle aussi lisse faisant face à l'ensemble fixe 12.According to this embodiment, each lamella constituting the tulip 30 has a free upstream end face which is located opposite the fixed contact 12. The upstream end face of each lamella is generally smooth, it is that is to say, it has no roughness, as described above, and the joining of the faces forms a smooth upstream annular surface facing the fixed assembly 12.

La charge de l'ensemble mobile 20 est ainsi répartie sur cette surface annulaire, au niveau de laquelle un ou plusieurs arcs électriques sont aptes à se former.The charge of the moving assembly 20 is thus distributed over this annular surface, at the level of which one or more electric arcs are able to form.

Selon une variante de ce mode de réalisation, la tulipe 30 et le capot 34 sont tous les deux portés par la tige 26 de manière que la tulipe 30 est montée à l'extrémité libre de la tige 26 et le capot 34 est situé axialement en retrait vers l'aval par rapport à la tulipe 30.According to a variant of this embodiment, the tulip 30 and the cap 34 are both carried by the rod 26 so that the tulip 30 is mounted at the free end of the rod 26 and the cap 34 is located axially in position. downstream withdrawal from tulip 30.

Ainsi, la charge électrique de l'ensemble mobile 20 est répartie sur une surface encore plus grande, retardant encore plus le moment d'apparition de l'arc électrique lors de la fermeture de l'appareillage ou réduisant la durée de formation de l'arc électrique lors de l'ouverture de l'appareillage 10.Thus, the electrical charge of the moving assembly 20 is distributed over an even larger surface, further delaying the moment of appearance of the electric arc when closing the apparatus or reducing the duration of formation of the electric arc when opening the switchgear 10.

L'invention a été décrite en référence à un appareillage 10 qui consiste en un sectionneur de mise à la terre comportant un contact fixe 12 qui est raccordé aux parties sous tension de la ligne de transport de courant électrique et comportant un contact mobile 22 qui est raccordé à la terre. Il sera compris que l'invention n'est pas limitée à un sectionneur de mise à la terre et que l'appareillage 10 peut consister en tout autre appareillage de ligne haute tension tel qu'un sectionneur ou un disjoncteur de ligne haute tension.The invention has been described with reference to an apparatus 10 which consists of an earthing switch having a fixed contact 12 which is connected to the live parts of the electric power transmission line and having a movable contact 22 which is connected to the ground. It will be understood that the invention is not limited to an earthing switch and that the switchgear 10 may be any other high voltage line switchgear such as a high voltage switch or line breaker.

Claims (8)

  1. High-voltage switchgear (10) of longitudinal main axis A, comprising:
    a stationary contact (12) arranged at an upstream end of the switchgear (10); and
    a movable contact (22) that is arranged at a downstream end of the switchgear (10), which contact is movable in the switchgear (10) between an upstream closing position of the switchgear (10) in which the movable contact (22) is connected to the stationary contact (12), and a downstream opening position of the switchgear (10) in which the movable contact is disconnected from the stationary contact;
    wherein the movable contact (22) comprises an axial rod (26) extending upstream and having an upstream axial end (26a) that is suitable for coming into contact with the stationary contact (12),
    the movable contact (22) having an anti-corona component (30, 34),
    the switchgear being characterized in that the anti-corona component (30, 34) is fixed to the rod (26) and projecting radially relative to the upstream end (26a) of the rod (26) and wherein an upstream face (36) of the anti-corona component (30), that is located axially facing the stationary contact (12) is smooth.
  2. Switchgear (10) according to claim 1, characterized in that the anti-corona component consists of a cap (34) projecting radially relative to the upstream end (26a) of the rod (26).
  3. Switchgear (10) according to claim 2, characterized in that the anti-corona cap (34) is suitable for coming into contact with the stationary contact (12) when the stationary contact (12) is in contact with the movable contact (22).
  4. Switchgear (10) according to claim 2, characterized in that the anti-corona cap (34) is remote from the stationary contact (12) when the stationary contact (12) is in contact with the movable contact (22).
  5. Switchgear (10) according to any of claim 2 to 4, characterized in that the stationary contact (12) comprises a generally tubular element (30) that is open downstream and in which the upstream end (26a) of the rod (26) is suitable for being received.
  6. Switchgear (10) according to any of claim 1 to 4, characterized in that the upstream end (26a) of the rod (26) carries a generally tubular element (30) that is open upstream, and in that the stationary contact (12) consists of a rod (32) that is suitable for being received in said tubular element (30) when the stationary contact (12) is in contact with the movable contact (22).
  7. Switchgear (10) according to the preceding claim, characterized in that the anti-corona cap (34) is situated axially set back downstream relative to said tubular element (30).
  8. Switchgear (10) according to claim 5 or claim 6, characterized in that the generally tubular element (30) forms a tulip comprising a plurality of metal axial blades distributed in circumferential manner about longitudinal main axis A.
EP12779073.1A 2011-11-03 2012-10-31 Electrical appliance comprising means for limiting the formation of an electric arc Active EP2774159B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1159946A FR2982412B1 (en) 2011-11-03 2011-11-03 ELECTRICAL EQUIPMENT COMPRISING MEANS FOR LIMITING THE FORMATION OF AN ELECTRICAL ARC
PCT/EP2012/071548 WO2013064532A1 (en) 2011-11-03 2012-10-31 Electrical appliance comprising means for limiting the formation of an electric arc

Publications (2)

Publication Number Publication Date
EP2774159A1 EP2774159A1 (en) 2014-09-10
EP2774159B1 true EP2774159B1 (en) 2015-09-16

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EP12779073.1A Active EP2774159B1 (en) 2011-11-03 2012-10-31 Electrical appliance comprising means for limiting the formation of an electric arc

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EP (1) EP2774159B1 (en)
KR (1) KR20140097165A (en)
CN (1) CN104040663B (en)
FR (1) FR2982412B1 (en)
WO (1) WO2013064532A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018181503A (en) * 2017-04-07 2018-11-15 三菱電機株式会社 Circuit breaker

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2344987A1 (en) * 1976-03-15 1977-10-14 Merlin Gerin EARTHING SWITCH FOR HIGH VOLTAGE SHIELDED SUBSTATION
DE69527950T2 (en) * 1994-04-05 2003-01-02 Abb Power T & D Co. Inc., Raleigh MOVABLE GAS MIXING PLATE FOR AUTOPNEUMATIC PRESSURE GAS SWITCH
EP1691389B1 (en) * 2005-02-10 2011-04-06 ABB Technology AG Interrupting chamber for a gas insulated high voltage circuit breaker
FR2906931B1 (en) * 2006-10-09 2009-07-17 Areva T & D Sa CUTTING CHAMBER WITH CYLINDER FIELD DISTRIBUTION FOR HIGH VOLTAGE OR MEDIUM VOLTAGE CIRCUIT BREAKERS

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KR20140097165A (en) 2014-08-06
FR2982412A1 (en) 2013-05-10
FR2982412B1 (en) 2014-12-26
CN104040663B (en) 2018-01-02
WO2013064532A1 (en) 2013-05-10
EP2774159A1 (en) 2014-09-10
CN104040663A (en) 2014-09-10

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