EP0236641A1 - Isolator for a metal-clad high tension installation - Google Patents

Isolator for a metal-clad high tension installation Download PDF

Info

Publication number
EP0236641A1
EP0236641A1 EP86402681A EP86402681A EP0236641A1 EP 0236641 A1 EP0236641 A1 EP 0236641A1 EP 86402681 A EP86402681 A EP 86402681A EP 86402681 A EP86402681 A EP 86402681A EP 0236641 A1 EP0236641 A1 EP 0236641A1
Authority
EP
European Patent Office
Prior art keywords
electrode
revolution
disconnector
envelope
disconnector according
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP86402681A
Other languages
German (de)
French (fr)
Other versions
EP0236641B1 (en
Inventor
Jean Kieffer
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT86402681T priority Critical patent/ATE73575T1/en
Publication of EP0236641A1 publication Critical patent/EP0236641A1/en
Application granted granted Critical
Publication of EP0236641B1 publication Critical patent/EP0236641B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Definitions

  • the invention relates to a disconnector of an armored installation with a metallic shell of revolution, grounded, filled with a gas of high dielectric strength, comprising: a movable contact in the form of a sliding pin, capable of coming into a closed engagement position with an aligned fixed contact, and into an open position for separating said fixed contact by an isolation interval "d", - a field distributor screen in the form of a fixed hood covering the end of the fixed contact to which it is electrically connected and having a central opening for the passage of the movable contact pin in the closed position of the disconnector, - a field distributor screen cover associated with the movable contact and arranged to cover the end of the movable contact in the open position while being electrically connected to the movable contact.
  • a disconnector of the type mentioned makes it possible to isolate part of the installation or a departure, in particular from an armored station, the operation of the disconnector being carried out without load.
  • Such a disconnector may have to cut capacitive or inductive currents of low power, but sufficient to draw an arc between the contacts of the disconnector.
  • Such an arc is quickly extinguished during the continued operation of the disconnector and does not lend itself to consequence when it remains confined in the contact separation zone.
  • the arc drawn between the contacts of the disconnector risks under certain severe conditions to migrate towards the casing and to generate an internal breakdown of the arc at the Earth.
  • it has already been proposed to limit the duration of the arc by an accelerated speed of the contacts or to maintain the arc in the central part by field distribution screens.
  • the present invention aims to allow the production of an isolation disconnector avoiding any ignition towards the earthed enclosure, during an operation of the disconnector.
  • the disconnector according to the invention is characterized in that it comprises an electrode of revolution arranged coaxially around said isolation interval "d", being interposed between this interval and the metal casing to capture an arc capable of migrating from said interval towards said envelope.
  • the electrode of revolution is sufficiently distant from the movable contact and from the parts at the potential of this contact, to hold the insulation voltage.
  • the electrode of revolution is also at a sufficient distance from the grounded metal casing to avoid any breakdown between this electrode and the casing.
  • the metal casing advantageously has at the level of the electrode of revolution an enlarged section sufficient to ensure the dielectric strength of the installation.
  • the envelope may be spherical or of cylindrical shape of enlarged section, connected by frustoconical parts to the cylindrical sheaths of the installation.
  • the length of the electrode of revolution corresponds substantially to the length of separation of the contacts to avoid any path from the arc to the grounded enclosure.
  • the edges of the electrode of revolution are rounded to ensure a good distribution of the field and to limit the risks of priming.
  • the electrode is preferably in the form of a ring, for example a toroid of circular section, coaxially enveloping the contacts of the disconnector.
  • the ring of revolution is fixed to the fixed contact by arms ensuring at the same time the electrical connection, these arms tangentially connecting to the external part of the ring.
  • the arms can belong or be replaced by a full cap forming a real screen between the fixed contact and the annular electrode preventing any passage of the arc in this interval.
  • a sealed and earthed metal casing 10 is filled with a gas with high dielectric strength, in particular sulfur hexafluoride.
  • the envelope 10 has flanges 12, 14, for connection to cylindrical sheaths 16, 18, belonging to the envelope of an armored station.
  • the sheaths 16, 18 surround coaxially conductors or bars 20, 22, supported by insulators 24, interposed between the flanges 12, 14.
  • the bars 20, 22, are perpendicular, but it It is clear that the invention applies to bars aligned or extending in oblique directions.
  • the end 26 of the bar 20 inside the casing 10 carries a fixed contact 28 having contact clamps 30, arranged in the form of a tulip to coaxially surround a movable contact 32, in the form of a sliding pin.
  • the pin 32 is connected by a rod 34 to an operating mechanism 36 capable of moving the pin 32 axially to come selectively into a closed position of engagement between the clamps 30 of fixed contact and opening of the disconnector at a distance " d "for separating the fixed contact 28.
  • the pin 32 is electrically connected by rubbing contacts 38 at the end of the bar 22 internal to the casing 10.
  • the fixed contact 28 and the movable contact 32 are each equipped with a cover 40, 42, of hemispherical shape ensuring good distribution of the field around these contacts.
  • the covers 40, 42 have an axial opening for the passage of the contact pin 32.
  • the fixed contact 28 can also have an arcing finger 44 disposed axially between the contact clamps 30 and extending to the edges of the cover 40.
  • the sliding pin 32 has, when the finger 44 exists, a combined internal recess 46 into which the finger 44 enters in the closed position of the disconnector.
  • Such a disconnector well known to specialists, makes it possible to establish or break the connection between the conductors 20, 22, by simple sliding, of the movable pin 32, actuated by the operating mechanism 36.
  • the metal casing 10 is in the form of a sphere with a section greater than that of the sheaths 16, 18, and the fixed contact assembly 28, movable contact 32, is disposed substantially in the center of this sphere.
  • An annular electrode 48 in the shape of a torus, is arranged in the diametrical plane of the sphere 10, perpendicular to the movable contact pin 32, coaxially surrounding the separation gap "d" of the fixed 28 and movable 32 contacts.
  • the electrode of revolution 48 is interposed between the metal casing 10 and the separation interval "d" which constitutes the zone of formation of an arc, during a cut of capacitive or inductive current.
  • the diameter of the torus 48 is substantially equivalent to the distance "d" of insulation between the fixed contacts 28 and movable 32 in a separate position.
  • the annular electrode 48 is fixed by arms or a cap 50 to the fixed contact 28. These arms are tangentially connected to the outer edges 52 of the torus to have a rounded shape avoiding any concentration of the electric field. Opposite ends of the arms 50 are fixed to the rear of the fixed contact 22 sheltered from the distributor cover 40. The arms 50 provide the mechanical support and the electrical connection of the annular electrode 48 to the fixed contact 28.
  • the separation distance from the annular electrode 48 to the movable contact 32 and to the distributor cover 42 is always greater than or equal to the isolation distance "d" separating the fixed contacts 28 and movable 32 in open position, so as to ensure sufficient dielectric strength.
  • the annular electrode 48 is sufficiently distant from the grounded metal casing 10, to avoid any breakdown between this electrode and the casing 10.
  • the isolation disconnector is clear from the previous description: - in the disconnector closed position, the pin 32 is engaged between the clamps 30 of the fixed contact 28 and ensures the connection between the bars 20, 22.
  • the opening of the disconnector is controlled by the mechanism 36 which imposes a sliding movement of pin 32 down in the figure.
  • an arc strikes between the arcing finger 44 and the end of the pin 32, as shown in the figure, this arc (or a secondary arc from the first) being likely to migrate on the distributor cover 40 and from there on the annular electrode 48.
  • the electrode 48 prevents any passage of the arc towards the metallic envelope 10, in particular between the fixed contact 28 and the electrode 48, the distance to be crossed to reach the casing 10, grounded always being greater than that to reach the electrode 48 or the distributor screen 40.
  • the cap 50 which can be full or perforated to form support arm, constitutes an additional barrier screen. Any risk of earthing is thus avoided.
  • the metal casing 10 may be in the form of an ellipsoid or of a cylinder associated with frustoconical connection parts or of any other form.
  • the section of the electrode of revolution 48 can be flattened to constitute an oval or a simple cylinder if care is taken to provide the edges with a swollen portion to avoid any point capable of ensuring a concentration of the field lines. Referring to the figure, it can be seen that the internal part of the electrode of revolution 48, disposed opposite the fixed contact 28, is of little use and that it can be removed, the electrode 48 being summed up in this case to a rounded part formed by a folding of the edge of the cap 50. The specialist can easily imagine other operating forms of such an electrode of revolution 48.
  • the arrangement according to invention requires a larger volume, but this increase is largely offset by the security provided by the electrode 48 which constitutes an almost impassable barrier to the arc. In the case of an envelope of sufficient diameter, it is obviously unnecessary to increase the section of the envelope in line with the ring of revolution 48.
  • the fixing and the electrical connection of the electrode of revolution 48 can be carried out in a different manner and independently of each other, the invention of course extending to any variant remaining within the framework of equivalences.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Contacts (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Insulators (AREA)

Abstract

An isolating switch of a metalclad installation having an earthed metal enclosure is filled with a high dielectric strength gas. The isolation gap "d" separating the stationary contact from the movable sliding pin is surrounded by an annular electrode fitted between this isolation gap "d" and the enclosure. The annular electrode extends over the whole length of the isolation gap "d" and is electrically connected to the stationary contact to prevent any migration of the arc drawn between the contacts towards the earthed enclosure. The metal enclosure is advantageously spherical in shape, the contacts being disposed appreciably in the center of the sphere.

Description

L'invention est relative à un sectionneur d'une installation blindée à enveloppe métallique de révolution, mise à la terre, remplie d'un gaz à rigidité diélectrique élevée, comprenant :
- un contact mobile en forme de broche coulissante, susceptible de venir en une position de fermeture d'engagement avec un contact fixe aligné, et en une position d'ouverture de séparation dudit contact fixe par un intervalle d'isolement "d",
- un écran répartiteur de champ en forme de capot fixe coiffant l'extrémité du contact fixe auquel il est électriquement connecté et présentant une ouverture centrale de passage de la broche du contact mobile en position fermée du sectionneur, - un écran répartiteur de champ en forme de capot associé au contact mobile et agencé pour coiffer l'extrémité du contact mobile en position ouvert en étant connecté électriquement au contact mobile.The invention relates to a disconnector of an armored installation with a metallic shell of revolution, grounded, filled with a gas of high dielectric strength, comprising:
a movable contact in the form of a sliding pin, capable of coming into a closed engagement position with an aligned fixed contact, and into an open position for separating said fixed contact by an isolation interval "d",
- a field distributor screen in the form of a fixed hood covering the end of the fixed contact to which it is electrically connected and having a central opening for the passage of the movable contact pin in the closed position of the disconnector, - a field distributor screen cover associated with the movable contact and arranged to cover the end of the movable contact in the open position while being electrically connected to the movable contact.

Un sectionneur du genre mentionné permet d'isoler une partie de l'installation ou un départ, notamment d'un poste blindé, la manoeuvre du sectionneur étant réalisée hors charge. Un tel sectionneur peut être amené à couper des courants capacitifs ou inductifs de faible puissance, mais suffisant pour tirer un arc entre les contacts du sectionneur. Un tel arc est rapidement éteint lors de la manoeuvre poursuivie du sectionneur et ne prête pas à conséquence lorsqu'il reste confiné dans la zone de séparation des contacts. Il a été constaté que dans une installation blindée à enveloppe métallique mise à la terre, l'arc tiré entre les contacts du sectionneur risque dans certaines conditions sévères de migrer vers l'enveloppe et d'engendrer un claquage interne de l'arc à la terre. Pour éviter ces inconvénients, il a déjà été proposé de limiter la durée de l'arc par une vitesse accélérée des contacts ou de maintenir l'arc dans la partie centrale par des écrans de répartition de champ. Ces solutions donnent satisfaction pour certaines coonditions de fonctionnement, mais elles n'assurent pas une fiabilité absolue.A disconnector of the type mentioned makes it possible to isolate part of the installation or a departure, in particular from an armored station, the operation of the disconnector being carried out without load. Such a disconnector may have to cut capacitive or inductive currents of low power, but sufficient to draw an arc between the contacts of the disconnector. Such an arc is quickly extinguished during the continued operation of the disconnector and does not lend itself to consequence when it remains confined in the contact separation zone. It has been noted that in a shielded installation with a grounded metal casing, the arc drawn between the contacts of the disconnector risks under certain severe conditions to migrate towards the casing and to generate an internal breakdown of the arc at the Earth. To avoid these drawbacks, it has already been proposed to limit the duration of the arc by an accelerated speed of the contacts or to maintain the arc in the central part by field distribution screens. These solutions give satisfaction for certain operating conditions, but they do not provide a absolute reliability.

La présente invention a pour but de permettre la réalisation d'un sectionneur d'isolement évitant tout amorçage vers l'enveloppe mise à la terre, lors d'une manoeuvre du sectionneur.The present invention aims to allow the production of an isolation disconnector avoiding any ignition towards the earthed enclosure, during an operation of the disconnector.

Le sectionneur selon l'invention est caractérisé en ce qu'il comporte une électrode de révolution disposée coaxialement autour dudit intervalle d'isolement "d", en étant intercalé entre cet intervalle et l'enveloppe métallique pour capter un arc susceptible de migrer dudit intervalle vers ladite enveloppe.The disconnector according to the invention is characterized in that it comprises an electrode of revolution arranged coaxially around said isolation interval "d", being interposed between this interval and the metal casing to capture an arc capable of migrating from said interval towards said envelope.

En entourant la zone d'arc d'une électrode reliée au contact fixe, on empeche ni la formation de l'arc, ni sa migration éventuelle, mais cette migration est alors orientée vers cette électrode, empêchant un amorçage sur l'enveloppe mise à la terre. L'électrode de révolution est suffisamment éloignée du contact mobile et des parties au potentiel de ce contact, pour tenir la tension d'isolement. L'électrode de révolution est également à une distance suffisante de l'enveloppe métallique mise à la terre pour éviter tout claquage entre cette électrode et l'enveloppe. A cet effet, l'enveloppe métallique présente avantageusement au niveau de l'électrode de révolution une section élargie suffisante pour assurer la tenue diélectrique de l'installation. L'enveloppe peut être sphérique ou de forme cylindrique de section agrandie, raccordée par des parties tronconiques aux gaines cylindriques de l'installation.By surrounding the arc zone with an electrode connected to the fixed contact, neither the formation of the arc nor its possible migration is prevented, but this migration is then oriented towards this electrode, preventing initiation on the envelope placed Earth. The electrode of revolution is sufficiently distant from the movable contact and from the parts at the potential of this contact, to hold the insulation voltage. The electrode of revolution is also at a sufficient distance from the grounded metal casing to avoid any breakdown between this electrode and the casing. To this end, the metal casing advantageously has at the level of the electrode of revolution an enlarged section sufficient to ensure the dielectric strength of the installation. The envelope may be spherical or of cylindrical shape of enlarged section, connected by frustoconical parts to the cylindrical sheaths of the installation.

La longueur de l'électrode de révolution correspond sensiblement à la longueur de séparation des contacts pour éviter tout cheminement de l'arc vers l'enveloppe mise à la terre. Les bords de l'électrode de révolution sont arrondis pour assurer une bonne répartition du champ et limiter les risques d'amorçage. L'électrode est de préférence en forme d'anneau, par exemple de tore de section circulaire, enveloppant coaxialement les contacts du sectionneur. L'anneau de révolution est fixé au contact fixe par des bras assurant en meme temps la connexion électrique, ces bras se raccordant tangentiellement à partie externe de l'anneau. Les bras peuvent appartenir ou être remplacés par une calotte pleine formant un véritable écran entre le contact fixe et l'électrode annulaire empêchant tout passage de l'arc dans cet intervalle.The length of the electrode of revolution corresponds substantially to the length of separation of the contacts to avoid any path from the arc to the grounded enclosure. The edges of the electrode of revolution are rounded to ensure a good distribution of the field and to limit the risks of priming. The electrode is preferably in the form of a ring, for example a toroid of circular section, coaxially enveloping the contacts of the disconnector. The ring of revolution is fixed to the fixed contact by arms ensuring at the same time the electrical connection, these arms tangentially connecting to the external part of the ring. The arms can belong or be replaced by a full cap forming a real screen between the fixed contact and the annular electrode preventing any passage of the arc in this interval.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple non limitatif et représenté à la figure unique annexée, qui est une coupe axiale d'un sectionneur selon l'invention, représenté en cours d'ouverture des contacts.Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and shown in the attached single figure, which is an axial section of a disconnector according to the invention, shown during the opening of the contacts.

Sur la figure, une enveloppe métallique 10 étanche et mise à la terre est remplie d'un gaz à rigidité diélectrique élevée, notamment d'héxafluorure de soufre. L'enveloppe 10 présente des brides 12, 14, de raccordement à des gaines cylindriques 16, 18, appartenant à l'enveloppe d'un poste blindé. Les gaines 16, 18, entourent coaxialement des conducteurs ou barres 20, 22, supportés par des isolateurs 24, intercalés entre les brides 12, 14. Dans l'exemple illustré par la figure, les barres 20, 22, sont perpendiculaires, mais il est clair que l'invention s'applique à des barres alignées ou s'étendant suivant des directions obliques. L'extrémité 26 de la barre 20 à l'intérieur de l'enveloppe 10 porte un contact fixe 28 ayant des pinces de contact 30, disposées en forme de tulipe pour entourer coaxialement un contact mobile 32, en forme de broche coulissante. La broche 32 est reliée par une tige 34 à un mécanisme de manoeuvre 36 susceptible de déplacer la broche 32 axialement pour venir sélectivement en une position de fermeture d'engagement entre les pinces 30 de contact fixe et d'ouverture du sectionneur à une distance "d" de séparation du contact fixe 28. La broche 32 est connectée électriquement par des contacts frottants 38 à l'extrémité de la barre 22 interne à l'enveloppe 10. Le contact fixe 28 et le contact mobile 32 sont chacun équipé d'un capot 40, 42, de forme hémisphérique assurant une bonne répartition du champ autour de ces contacts. Les capots 40, 42, présentent une ouverture axiale de passage de la broche de contact 32. Le contact fixe 28 peut présenter de plus un doigt d'arc 44 disposé axialement entre les pinces de contact 30 et s'étendant jusqu'aux bords du capot 40. La broche coulissante 32 présente, lorsque le doigt 44 existe, un évidement interne conjugé 46 dans lequel pénètre le doigt 44 en position de fermeture du sectionneur. Un tel sectionneur, bien connu des spécialistes, permet d'établir ou de rompre la connexion entre les conducteurs 20, 22, par simple coulissement, de la broche mobile 32, actionné par le mécanisme de manoeuvre 36.In the figure, a sealed and earthed metal casing 10 is filled with a gas with high dielectric strength, in particular sulfur hexafluoride. The envelope 10 has flanges 12, 14, for connection to cylindrical sheaths 16, 18, belonging to the envelope of an armored station. The sheaths 16, 18 surround coaxially conductors or bars 20, 22, supported by insulators 24, interposed between the flanges 12, 14. In the example illustrated by the figure, the bars 20, 22, are perpendicular, but it It is clear that the invention applies to bars aligned or extending in oblique directions. The end 26 of the bar 20 inside the casing 10 carries a fixed contact 28 having contact clamps 30, arranged in the form of a tulip to coaxially surround a movable contact 32, in the form of a sliding pin. The pin 32 is connected by a rod 34 to an operating mechanism 36 capable of moving the pin 32 axially to come selectively into a closed position of engagement between the clamps 30 of fixed contact and opening of the disconnector at a distance " d "for separating the fixed contact 28. The pin 32 is electrically connected by rubbing contacts 38 at the end of the bar 22 internal to the casing 10. The fixed contact 28 and the movable contact 32 are each equipped with a cover 40, 42, of hemispherical shape ensuring good distribution of the field around these contacts. The covers 40, 42 have an axial opening for the passage of the contact pin 32. The fixed contact 28 can also have an arcing finger 44 disposed axially between the contact clamps 30 and extending to the edges of the cover 40. The sliding pin 32 has, when the finger 44 exists, a combined internal recess 46 into which the finger 44 enters in the closed position of the disconnector. Such a disconnector, well known to specialists, makes it possible to establish or break the connection between the conductors 20, 22, by simple sliding, of the movable pin 32, actuated by the operating mechanism 36.

Selon l'invention, l'enveloppe métallique 10 est en forme de sphère d'une section supérieure à celle des gaines 16, 18, et l'ensemble de contact fixe 28, contact mobile 32, est disposé sensiblement au centre de cette sphère. Une électrode annulaire 48, en forme de tore, est disposée dans le plan diamétral de la sphère 10, perpendiculaire à la broche 32 de contact mobile, en entourant coaxialement, l'intervalle de séparation "d" des contacts fixe 28 et mobile 32. L'électrode de révolution 48 est intercalée entre l'enveloppe métallique 10 et l'intervalle de séparation "d" qui constitue la zone de formation d'un arc, lors d'une coupure de courant capacitif ou inductif. Le diamètre du tore 48 est sensiblement équivalent à la distance "d" d'isolement entre les contacts fixe 28 et mobiles 32 en position séparée. L'électrode annulaire 48 est fixée par des bras ou une calotte 50 au contact fixe 28. Ces bras se raccordent tangentiellement aux bords externes 52 du tore pour présenter une forme arrondie évitant toute concentration du champ électrique. Des extrémités opposées des bras 50 sont fixées à l'arrière du contact fixe 22 à l'abri du capot répartiteur 40. Les bras 50 assurent le support mécanique et la liaison électrique de l'électrode annulaire 48 au contact fixe 28. En se référant à la figure, on voit que la distance de séparation de l'électrode annulaire 48 au contact mobile 32 et au capot répartiteur 42 est toujours supérieure ou égale à la distance d'isolement "d" séparant les contacts fixe 28 et mobile 32 en position d'ouverture, de manière à assurer une tenue diélectrique suffisante. D'une manière analogue, l'électrode annulaire 48 est suffisamment distante de l'enveloppe métallique 10 mise à la terre, pour éviter tout claquage entre cette électrode et l'enveloppe 10.According to the invention, the metal casing 10 is in the form of a sphere with a section greater than that of the sheaths 16, 18, and the fixed contact assembly 28, movable contact 32, is disposed substantially in the center of this sphere. An annular electrode 48, in the shape of a torus, is arranged in the diametrical plane of the sphere 10, perpendicular to the movable contact pin 32, coaxially surrounding the separation gap "d" of the fixed 28 and movable 32 contacts. The electrode of revolution 48 is interposed between the metal casing 10 and the separation interval "d" which constitutes the zone of formation of an arc, during a cut of capacitive or inductive current. The diameter of the torus 48 is substantially equivalent to the distance "d" of insulation between the fixed contacts 28 and movable 32 in a separate position. The annular electrode 48 is fixed by arms or a cap 50 to the fixed contact 28. These arms are tangentially connected to the outer edges 52 of the torus to have a rounded shape avoiding any concentration of the electric field. Opposite ends of the arms 50 are fixed to the rear of the fixed contact 22 sheltered from the distributor cover 40. The arms 50 provide the mechanical support and the electrical connection of the annular electrode 48 to the fixed contact 28. With reference to in the figure, it can be seen that the separation distance from the annular electrode 48 to the movable contact 32 and to the distributor cover 42 is always greater than or equal to the isolation distance "d" separating the fixed contacts 28 and movable 32 in open position, so as to ensure sufficient dielectric strength. In an analogous manner, the annular electrode 48 is sufficiently distant from the grounded metal casing 10, to avoid any breakdown between this electrode and the casing 10.

Le fonctionnement du sectionneur d'isolement ressort de l'exposé précédent :
- en position de fermeture du sectionneur, la broche 32 est engagée entre les pinces 30 du contact fixe 28 et assure la connexion entre les barres 20, 22. L'ouverture du sectionneur est commandée par le mécanisme 36 qui impose un mouvement de coulissement de la broche 32 vers le bas sur la figure. Lors de la séparation des contacts 28, 32, un arc s'amorce entre le doigt d'arc 44 et l'extrémité de la broche 32, de la manière représentée sur la figure, cet arc (ou un arc secondaire issu du premier) étant susceptible de migrer sur le capot répartiteur 40 et de là sur l'électrode annulaire 48. IL est facile de voir que l'électrode 48 empêche tout passage de l'arc vers l'enveloppe métallique 10, notamment entre le contact fixe 28 et l'électrode 48, la distance à franchir pour atteindre l'enveloppe 10, mise à la terre étant toujours supérieure à celle pour atteindre l'électrode 48 ou l'écran répartiteur 40. La calotte 50 qui peut être pleine ou ajourée pour former des bras de support, constitue un écran additionnel de barrage. Tout risque de mise à la terre est ainsi évité.The operation of the isolation disconnector is clear from the previous description:
- in the disconnector closed position, the pin 32 is engaged between the clamps 30 of the fixed contact 28 and ensures the connection between the bars 20, 22. The opening of the disconnector is controlled by the mechanism 36 which imposes a sliding movement of pin 32 down in the figure. During the separation of the contacts 28, 32, an arc strikes between the arcing finger 44 and the end of the pin 32, as shown in the figure, this arc (or a secondary arc from the first) being likely to migrate on the distributor cover 40 and from there on the annular electrode 48. It is easy to see that the electrode 48 prevents any passage of the arc towards the metallic envelope 10, in particular between the fixed contact 28 and the electrode 48, the distance to be crossed to reach the casing 10, grounded always being greater than that to reach the electrode 48 or the distributor screen 40. The cap 50 which can be full or perforated to form support arm, constitutes an additional barrier screen. Any risk of earthing is thus avoided.

L'enveloppe métallique 10 peut être en forme d'ellipsoïde ou de cylindre associé à des parties de raccordement tronconique ou de toute autre forme. La section de l'électrode de révolution 48 peut être aplatie pour constituer un oval ou un simple cylindre si l'on prend soin de munir les bords d'une partie renflée pour éviter toute pointe susceptible d'assurer une concentration des lignes de champ. En se référant à la figure, on voit que la partie interne de l'électrode de révolution 48, disposée en regard du contact fixe 28, est sans grande utilité et qu'elle peut être supprimée, l'électrode 48 se résumant dans ce cas à une partie arrondie formée par un repliement du bord de la calotte 50. Le spécialiste peut facilement imaginer d'autres formes opérantes d'une telle électrode de révolution 48. La disposition selon l'invention nécessite un volume supérieur, mais cette augmentation est largement compensée par la sécurité assurée par l'électrode 48 qui constitue une barrière quasi-infranchissable à l'arc. Dans le cas d'une enveloppe d'un diamètre suffisant il est bien entendu inutile d'accroître la section de l'enveloppe au droit de l'anneau de révolution 48. La fixation et la connexion électrique de l'électrode de révolution 48 peuvent être réalisées d'une manière différente et indépendamment l'une de l'autre, l'invention s'étendant bien entendu à toute variante de réalisation restant dans le cadre des équivalences.The metal casing 10 may be in the form of an ellipsoid or of a cylinder associated with frustoconical connection parts or of any other form. The section of the electrode of revolution 48 can be flattened to constitute an oval or a simple cylinder if care is taken to provide the edges with a swollen portion to avoid any point capable of ensuring a concentration of the field lines. Referring to the figure, it can be seen that the internal part of the electrode of revolution 48, disposed opposite the fixed contact 28, is of little use and that it can be removed, the electrode 48 being summed up in this case to a rounded part formed by a folding of the edge of the cap 50. The specialist can easily imagine other operating forms of such an electrode of revolution 48. The arrangement according to invention requires a larger volume, but this increase is largely offset by the security provided by the electrode 48 which constitutes an almost impassable barrier to the arc. In the case of an envelope of sufficient diameter, it is obviously unnecessary to increase the section of the envelope in line with the ring of revolution 48. The fixing and the electrical connection of the electrode of revolution 48 can be carried out in a different manner and independently of each other, the invention of course extending to any variant remaining within the framework of equivalences.

Claims (9)

1. Sectionneur d'une installation blindée à enveloppe métallique (10) de révolution mise à la terre, remplie d'un gaz à rigidité diélectrique élevée, comprenant :
- un contact mobile en forme de broche (32) coulissante susceptible de venir en une position de fermeture d'engagement avec un contact fixe (28) aligné, et en une position d'ouverture de séparation dudit contact fixe par un intervalle d'isolement ("d"),
- un écran (40) répartiteur de champ en forme de capot fixe coiffant l'extrémité du contact fixe (28) auquel il est électriquement connecté et présentant une ouverture centrale de passage de la broche (32) du contact mobile en position fermée du sectionneur,
- un écran (42) répartiteur de champ en forme de capot associé au contact mobile (32) et agencé pour coiffer l'extrémité du contact mobile en position ouvert en étant connecté électriquement au contact mobile,
caractérisé en ce qu'il comporte une électrode de révolution (48) disposée coaxialement autour dudit intervalle d'isolement ("d"), en étant intercalée entre cet intervalle et l'enveloppe métallique (10) pour capter un arc susceptible de migrer dudit intervalle vers ladite enveloppe.1. Disconnector of a shielded installation with a metallic enclosure (10) of grounded revolution, filled with a gas of high dielectric strength, comprising:
- a sliding pin-shaped movable contact (32) capable of coming into a closed engagement position with an aligned fixed contact (28), and into an open position for separating said fixed contact by an isolation gap ("d"),
- a screen (40) field distributor in the form of a fixed cover covering the end of the fixed contact (28) to which it is electrically connected and having a central opening for passage of the pin (32) of the movable contact in the closed position of the disconnector ,
a screen (42) field distributor in the form of a cover associated with the movable contact (32) and arranged to cover the end of the movable contact in the open position while being electrically connected to the movable contact,
characterized in that it comprises an electrode of revolution (48) arranged coaxially around said isolation interval ("d"), being interposed between this interval and the metal envelope (10) to pick up an arc capable of migrating from said interval towards said envelope. 2. Sectionneur selon la revendication 1, caractérisé en ce que ladite enveloppe (10) de révolution présente au niveau de ladite électrode de révolution (48) une section élargie pour assurer une tenue diélectrique suffisante entre l'électrode et l'enveloppe.2. Disconnector according to claim 1, characterized in that said envelope (10) of revolution has, at the level of said electrode of revolution (48), an enlarged section to ensure sufficient dielectric strength between the electrode and the envelope. 3. Sectionneur selon la revendication 2, caractérisé en ce que ladite enveloppe (10) est de forme sphérique, et que ledit ensemble de contacts (28, 32) est disposé sensiblement au centre de la sphère.3. Disconnector according to claim 2, characterized in that said envelope (10) is of spherical shape, and that said set of contacts (28, 32) is disposed substantially in the center of the sphere. 4. Sectionneur selon l'une des revendications précédentes, caractérisé en ce que ladite électrode de révolution (48) présente des bords arrondis favorisant une bonne répartition du champ électrique.4. Disconnector according to one of the preceding claims, characterized in that said revolution electrode (48) has rounded edges promoting good distribution of the electric field. 5. Sectionneur selon la revendication 4, caractérisé en ce que ladite électrode (48) est en forme d'anneau à axe aligné avec lesdits contacts (28, 32), la longueur axiale de l'anneau correspondant sensiblement à l'intervalle d'isolement ("d") entouré par l'anneau sur toute sa longueur.5. Disconnector according to claim 4, characterized in that said electrode (48) is in the form of a ring with an axis aligned with said contacts (28, 32), the axial length of the ring corresponding substantially to the interval of isolation ("d") surrounded by the ring over its entire length. 6. Sectionneur selon la revendication 5, caractérisé en ce que ladite électrode (48) est un tore de section circulaire.6. Disconnector according to claim 5, characterized in that said electrode (48) is a toroid of circular section. 7. Sectionneur selon l'une des revendications précédentes, caractérisé en ce que ladite électrode (48) de révolution est dotée de bras (50) de support et de connexion électrique fixés audit contact fixe (28) à l'abri de l'écran (40) répartiteur de champ.7. Disconnector according to one of the preceding claims, characterized in that said electrode (48) of revolution is provided with arms (50) for support and electrical connection fixed to said fixed contact (28) sheltered from the screen (40) field distributor. 8. Sectionneur selon la revendication 7, caractérisé en ce que lesdits bras (50) forment une calotte pleine ou ajourée dont le bord circulaire (52) se raccorde tangentiellement à la surface externe de l'électrode de révolution (48).8. Disconnector according to claim 7, characterized in that said arms (50) form a solid or perforated cap whose circular edge (52) is tangentially connected to the external surface of the revolution electrode (48). 9. Sectionneur selon l'une des revendications précédentes, caractérisé en ce que ledit contact fixe (28) comporte des pinces de contact (30) entourant circonférentiellement ladite broche (32) en position de fermeture et un doigt (44) d'arc s'étendant axialement jusqu'à l'ouverture centrale du capot (40) répartiteur de champ, susceptible de s'engager dans un orifice (44) axial conjugué de la broche mobile (32) en position de fermeture.9. Disconnector according to one of the preceding claims, characterized in that said fixed contact (28) comprises contact clamps (30) circumferentially surrounding said pin (32) in the closed position and a finger (44) of arc s 'extending axially to the central opening of the cover (40) field distributor, capable of engaging in an orifice (44) axial conjugate of the movable spindle (32) in the closed position.
EP86402681A 1985-12-20 1986-12-03 Isolator for a metal-clad high tension installation Expired - Lifetime EP0236641B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402681T ATE73575T1 (en) 1985-12-20 1986-12-03 DISCONNECTING SWITCH OF A METAL ENCLOSED HIGH VOLTAGE SYSTEM.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8519216A FR2592210B1 (en) 1985-12-20 1985-12-20 ISOLATION DISCONNECTOR OF A HIGH VOLTAGE SHIELDED INSTALLATION
FR8519216 1985-12-20

Publications (2)

Publication Number Publication Date
EP0236641A1 true EP0236641A1 (en) 1987-09-16
EP0236641B1 EP0236641B1 (en) 1992-03-11

Family

ID=9326187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402681A Expired - Lifetime EP0236641B1 (en) 1985-12-20 1986-12-03 Isolator for a metal-clad high tension installation

Country Status (9)

Country Link
US (1) US4748303A (en)
EP (1) EP0236641B1 (en)
JP (1) JPH0775131B2 (en)
CN (1) CN1014373B (en)
AT (1) ATE73575T1 (en)
CA (1) CA1279355C (en)
DE (1) DE3684303D1 (en)
FR (1) FR2592210B1 (en)
IN (1) IN167847B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0719505B2 (en) * 1988-06-02 1995-03-06 株式会社東芝 Disconnector
EP0712595A1 (en) * 1994-11-21 1996-05-22 Hiroko Suzuki Dome type feather quilt
CN101527431B (en) * 2009-04-13 2010-12-29 中国西电电气股份有限公司 Supervoltage/extra-high voltage GIS isolating device
EP3819925A1 (en) * 2019-11-06 2021-05-12 General Electric Technology GmbH Improved insulating support assembly for a circuit breaker

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744144C (en) * 1934-12-18 1944-01-10 Const Electr De Delle Sa Atel Device for reducing the flashover distance at which pre-discharges occur when switches are switched on
US4236053A (en) * 1977-09-02 1980-11-25 Hitachi, Ltd. Puffer type gas circuit breaker
EP0040781A1 (en) * 1980-05-23 1981-12-02 ALSTHOM-ATLANTIQUE Société anonyme dite: Disconnecting switch for high-voltage metal-enclosed switchgear
FR2558301A1 (en) * 1984-01-17 1985-07-19 Merlin Gerin High-voltage shielded set isolator equipped with perforated discharge arrester screens.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1270584A (en) * 1960-07-18 1961-09-01 Merlin Gerin Improvements to pneumatic circuit breakers having at least one tubular contact
JPS56116228A (en) * 1980-02-16 1981-09-11 Hitachi Ltd Gas insulating interrupter
JPS58204429A (en) * 1982-05-24 1983-11-29 株式会社東芝 Gas insulated switch
DE3521945A1 (en) * 1985-06-14 1986-12-18 Siemens AG, 1000 Berlin und 8000 München DISCONNECTOR FOR A METAL-ENCLOSED, PRESSURE-GAS INSULATED HIGH-VOLTAGE SWITCHGEAR

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE744144C (en) * 1934-12-18 1944-01-10 Const Electr De Delle Sa Atel Device for reducing the flashover distance at which pre-discharges occur when switches are switched on
US4236053A (en) * 1977-09-02 1980-11-25 Hitachi, Ltd. Puffer type gas circuit breaker
EP0040781A1 (en) * 1980-05-23 1981-12-02 ALSTHOM-ATLANTIQUE Société anonyme dite: Disconnecting switch for high-voltage metal-enclosed switchgear
FR2558301A1 (en) * 1984-01-17 1985-07-19 Merlin Gerin High-voltage shielded set isolator equipped with perforated discharge arrester screens.

Also Published As

Publication number Publication date
JPS62160621A (en) 1987-07-16
JPH0775131B2 (en) 1995-08-09
IN167847B (en) 1990-12-29
EP0236641B1 (en) 1992-03-11
CA1279355C (en) 1991-01-22
FR2592210B1 (en) 1990-07-27
CN86108278A (en) 1987-07-01
FR2592210A1 (en) 1987-06-26
US4748303A (en) 1988-05-31
ATE73575T1 (en) 1992-03-15
DE3684303D1 (en) 1992-04-16
CN1014373B (en) 1991-10-16

Similar Documents

Publication Publication Date Title
EP0385886B1 (en) Circuit breaker with a rotating arc and with a centrifugal effect of the extinguishing gas
EP0538157B1 (en) Hybrid circuit-breaker with axial blow-out coil
EP0433184B1 (en) Hybrid-medium high voltage circuit breaker
EP0239460B1 (en) Electric switch having an ameliorated dielectric strength
FR2682807A1 (en) ELECTRIC CIRCUIT BREAKER WITH TWO VACUUM CARTRIDGES IN SERIES.
EP0012048B1 (en) Rotating arc switch
EP0224051B1 (en) Sulphur hexafluoride station for load switching
EP1571685A1 (en) Mounting device for a shield in an electrical interrupter, preferably in a vacuum interrupter
FR2476381A1 (en) ISOLATED GAS DISCONNECT
EP0240397A1 (en) Self-blast electrical circuit breaker with a rotating arc
EP0236641B1 (en) Isolator for a metal-clad high tension installation
EP0277848B1 (en) Multiphase circuit breaker with self-expansion having per phase a gas-insulated arc extinguishing chamber
EP0040781B1 (en) Disconnecting switch for high-voltage metal-enclosed switchgear
EP0689217B1 (en) Vacuum tube, especially for circuit breaker or h.t. electrical switch, and switch incorporating such a tube
EP0433183A1 (en) Three-pole gasinsulated high tension circuit breaker
FR2628258A1 (en) Gas filled medium-voltage switch with composite envelope - metal centre section supports operating shaft and moving contacts and is capped by insulating sections carrying fixed elements
FR2542918A1 (en) Rotating arc interrupter with ionised gas circulation
EP0518786B1 (en) Electrical vacuum switch
FR2553926A1 (en) High-voltage circuit breaker with closure resistors
CH634687A5 (en) Rotating-arc and self-blasting high-voltage circuit breaker
CA1273043A (en) Closing resistor dielectric gas high voltage circuit-breaker
FR2612683A1 (en) High-voltage circuit breaker with closure resistor
FR2596915A1 (en) ELECTRICAL SHUT-OFF CIRCUIT BREAKER HAVING A HIGH DIELECTRIC STRENGTH
EP0823721B1 (en) Self-blasting electrical circuit breaker with a rotating arc
FR2629944A1 (en) High-voltage shielded circuit-breaker

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE GB IT LI SE

17P Request for examination filed

Effective date: 19880219

17Q First examination report despatched

Effective date: 19900528

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19920311

Ref country code: GB

Effective date: 19920311

Ref country code: AT

Effective date: 19920311

REF Corresponds to:

Ref document number: 73575

Country of ref document: AT

Date of ref document: 19920315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3684303

Country of ref document: DE

Date of ref document: 19920416

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 86402681.0

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19970214

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19971231

BERE Be: lapsed

Owner name: MERLIN GERIN

Effective date: 19971231

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19991206

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19991207

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19991210

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001231

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001231

EUG Se: european patent has lapsed

Ref document number: 86402681.0

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20011002