EP0040781A1 - Disconnecting switch for high-voltage metal-enclosed switchgear - Google Patents

Disconnecting switch for high-voltage metal-enclosed switchgear Download PDF

Info

Publication number
EP0040781A1
EP0040781A1 EP19810103784 EP81103784A EP0040781A1 EP 0040781 A1 EP0040781 A1 EP 0040781A1 EP 19810103784 EP19810103784 EP 19810103784 EP 81103784 A EP81103784 A EP 81103784A EP 0040781 A1 EP0040781 A1 EP 0040781A1
Authority
EP
European Patent Office
Prior art keywords
contact
disconnector
hemispherical
tip
diameter
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
EP19810103784
Other languages
German (de)
French (fr)
Other versions
EP0040781B1 (en
Inventor
Lucien Orgeret
Gilles Voisin
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.)
Alsthom Atlantique SA
Original Assignee
Alsthom Atlantique 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 Alsthom Atlantique SA filed Critical Alsthom Atlantique SA
Publication of EP0040781A1 publication Critical patent/EP0040781A1/en
Application granted granted Critical
Publication of EP0040781B1 publication Critical patent/EP0040781B1/en
Expired 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 high voltage shielded substation disconnector in a coaxial metal casing filled with compressed dielectric gas, said disconnector comprising a movable contact, cooperating with a fixed contact, said contacts being each carried by a fixed tubular contact holder coaxial with the 'envelope, the opposite ends of the contact carriers being each provided with a substantially hemispherical corona hood having a re-entrant cylindrical neck intended for the passage of the associated contact, said movable contact having a hemispherical tip.
  • a disconnector only cuts and establishes very low currents, generally capacitive currents corresponding to the capacitance of a busbar under voltage.
  • the object of the invention is to provide a slow-action disconnector, in which the fixed and mobile contacts and the corona shields have a shape such that the length of the arc is small, the electric field in the vicinity of the axis of the contacts. is also weak and that the arc from its birth and during its development remains in the zone with weak field in the vicinity of the axis.
  • the subject of the invention is a disconnector for a shielded substation in a coaxial metal casing filled with compressed dielectric gas, said disconnector comprising a movable contact cooperating with a fixed contact, said contacts being each carried by a fixed tubular contact holder coaxial with the casing, the opposite ends of the contact carriers being provided with a substantially hemispherical corona hood having a re-entrant cylindrical neck intended for the passage of the movable contact, said movable contact having a hemispherical endpiece, characterized in that the fixed contact comprises a semi-mobile contact with hemispherical tip of the same diameter as that of the tip of the mobile contact. In the open position, the end of the tip of the semi-mobile contact is preferably disposed between the entry threshold of the corona hood and the end of the writing circle of its hemispherical part.
  • the tip of the movable contact being disposed back from the entry threshold of the cylindrical neck of the corona hood, the distance separating the thresholds of the corona hoods is between 50% and 100% of the diameter hemispherical parts.
  • the diameter of the cylindrical necks is preferably between 20% and 35% of the diameter of the hemispherical parts.
  • FIG. 1 there is shown a portion of an armored substation, made up of tubular metallic envelopes 1, the ends of which have connection flanges 2, between which are insulated isolators 3 which support active parts of the installation arranged coaxially.
  • the tubular casings 1 are filled with a dielectric gas such as sulfur hexafluoride under a pressure of three to five bars.
  • the envelopes 1 contain the constituent elements of a disconnector whose movable part is arranged on the right and the fixed part is arranged on the left.
  • the movable part of the disconnector comprises a tubular movable contact 8, coaxial with the casing 1, the visible end of which comprises a hemispherical end piece 9.
  • the axial movement of the movable contact 8 is controlled by means of a mechanism not shown under operator dependence.
  • the movable contact 8 is placed inside a tubular contact carrier 4 supported by the insulator 3.
  • the movable contact 8 is connected to the contact carrier 4 by means of sliding contacts 46 arranged in circular grooves 45 formed inside the contact holder 4.
  • a corona hood 7 is disposed between the insulator 3 and the end of the contact holder 4 surrounding the end piece 9.
  • the cover 7 comprises a hemispherical part 70 connecting an envelope cylindrical 71 to a cylindrical neck 72 returning inwards, the cylindrical parts have a generator parallel to the disconnector axis.
  • the fixed part of the disconnector comprises a semi-movable tubular contact 13 coaxial with the casing 1, one end of which comprises a hemispherical end piece 14 disposed opposite the end piece 9.
  • the semi-mobile contact 13 has at its other end a collar 15 subjected to a fixed compression spring 16 which tends to press it against a ring 17 forming a stop.
  • a tubular contact carrier 10, disposed around the semi-mobile contact 13 and coaxial with the casing 1, is supported by an insulator similar to the insulator 3, not shown in the figure.
  • the spring 16 is secured inside the contact carrier 10 which supports on the opposite side a ring of contact fingers 12 capable of cooperating with the semi-mobile contact 13 disposed sliding along the ring 17.
  • a corona hood 6 similar to the cover 7 is arranged at the end of the contact carrier 10 and facing the cover 7.
  • the cover 6 thus comprises a hemispherical part 60 connecting a cylindrical envelope 61 to a cylindrical neck 62 returning inwards, the parts cylindrical with a generator parallel to the axis of the disconnector.
  • the diameters of the cylindrical parts 61 and 71 on the one hand and 62 and 72 on the other are equal, while the radii of curvature of the hemispherical parts 60 and 70 are the same.
  • the end of the hemispherical end piece 9 of the movable contact 8 is disposed slightly back from the entry threshold 73 of the cylindrical neck 72.
  • the end of the hemispherical end piece 14 is arranged substantially midway between the entry threshold 63 of the cylindrical neck 62 and what would constitute the end 64 of the sphere of inscription of the hemispherical part 60.
  • the movable contact 8 and the end piece 9 are moved from right to left.
  • the end piece 9 takes in particular the intermediate position traced in dashes and identified at 59 in this position; the distance between the cover 6 and the end piece 59 is short and a hail arc 20 erupts between these elements.
  • the deformed electric field in the vicinity of the end pieces 59 and 14 is represented by the equipotential lines 23 drawn by dashes, at the upper part of Figure 1.
  • the arc 20 remaining substantially parallel to the equipotential lines does not tend to move. It goes out when the ferrules 9 and 14 come into galvanic contact.
  • the disconnector When the disconnector has completed its stroke, the contact is established between the contact fingers 12 and the movable contact 8, which has the same diameter as the semi-movable contact 13 and which is pushed back against the action of the spring 16; its tip 14 takes the position marked at 54 and the tip is then at 69.
  • the diameter of the hemispherical ends 9 and 6 and of the tubular contacts 8 and 13 is between 20 and 35% of the diameter of the cylindrical parts 71 and 61 of the covers 7 and 6.
  • FIG. 2 there is shown an alternative embodiment of the covers which still gives good results.
  • the entry threshold 63 of the cylindrical neck 62 has a flat transverse range, the right end of the cover 6 represents a flat part with a diameter, the outside diameter does not exceed half the diameter of the cylindrical part 61.
  • disconnector it is also possible to simplify the contact on the side of the fixed part by removing the tube 13, its end piece 14 and the spring 16, but retaining the contact fingers 12 and the cover 6 the shape of which is shown in FIG. 1.
  • the pre-priming or cutting arc then bursts between the end piece 9 and the hemispherical end 61 of the cover 6.
  • the contact end piece may have a blind hole.
  • This arrangement can interest both the end piece 9 and the end piece 14.
  • FIG. 3 represents such a end piece 80 comprising a blind hole 81; the edges of the hole are rounded, this allows the arc to be centered, forcing it to hang on the end of the end piece (rounded end of the hole).
  • the dimensions of the hole are as follows for the best result: diameter of the hole d between 10 and 30% of the maximum diameter D of the nozzle 80, radius r of the rounding at the end of the hole between 20 and 50% of the hole diameter.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Circuit Breakers (AREA)

Abstract

1. A disconnecting switch for an armoured high voltage station under a coaxial metal sheath (1) which is filled with a pressurized dielectric gas, said disconnecting switch comprising a mobile contact (8) cooperating with a fixed contact (13, 14, 16), said contacts being carried each by a tubular fixed contact support (4, 10) which is coaxial with the sheath, the facing ends of the contact supports being furnhished each with an essentially hemispheric discharge protection cap (6, 7) presenting a cylindrical neck (62, 72) turned inwards and destined for the passage of the associated contact, said mobile contact presenting a hemispheric tip (9), the fixed contact comprising a contact piece (13) providing limited movement and having a hemispheric tip (14) of the same diameter as the tip (9) of the mobile contact (8), characterized in that in the opening position, the end of the tip (14) of the contact piece (13) with limited movement is disposed between the border of the discharge protection cap (6) and the end (64) of the inscription circle of its hemispheric part (60).

Description

L'invention concerne un sectionneur de poste blindé à haute tension sous enveloppe métallique coaxiale remplie de gaz diélectrique comprimé, ledit sectionneur comprenant un contact mobile, coopérant avec un contact fixe, lesdits contacts étant portés chacun par un porte-contact tubulaire fixe coaxial avec l'enveloppe, les extrémités en regard des porte-contact étant munies chacune d'un capot pare-effluves sensiblement hémisphérique présentant un col cylindrique rentrant destiné au passage du contact associé, ledit contact mobile présentant un embout hémisphérique.The invention relates to a high voltage shielded substation disconnector in a coaxial metal casing filled with compressed dielectric gas, said disconnector comprising a movable contact, cooperating with a fixed contact, said contacts being each carried by a fixed tubular contact holder coaxial with the 'envelope, the opposite ends of the contact carriers being each provided with a substantially hemispherical corona hood having a re-entrant cylindrical neck intended for the passage of the associated contact, said movable contact having a hemispherical tip.

Un sectionneur ne coupe et n'établit que des courants très faibles, généralement des courants capacitifs correspondant à la capacitance d'un jeu de barres sous tension.A disconnector only cuts and establishes very low currents, generally capacitive currents corresponding to the capacitance of a busbar under voltage.

S'agissant d'un sectionneur disposé à l'air libre, à l'intérieur d'un bâtiment ou à l'extérieur, la coupure d'un tel courant et son établissement ne causent que des effets négligeables, les distances entre pièces sous tension et les charpentes ou parois mises à la terre étant grandes. Mais pour les postes blindés sous enveloppe métallique remplie de gaz isolant, tels qu'ils sont utilisés pour des tensions atteignant 800 kV, les distances sont courtes et les gradients de tension sont élevés.In the case of a disconnector placed in the open air, inside a building or outside, the interruption of such a current and its establishment only cause negligible effects, the distances between rooms under tension and the earthed frames or walls being large. However, for shielded substations in a metal envelope filled with insulating gas, as they are used for voltages up to 800 kV, the distances are short and the voltage gradients are high.

Pour avoir les distances minimales, la distribution du champ électrique doit être homogène ; on utilise aussi des capots mis sous tension qui élèvent le seuil de tension de l'apparition d'effluves. De tels capots présentent souvent entre entrée et sortie du sectionneur une partie plate perpendiculaire à l'axe du sectionneur, associée par des arrondis à une partie cylindrique très lisse, dont l'axe se confond avec l'axe du sectionneur.To have the minimum distances, the distribution of the electric field must be homogeneous; we also use energized hoods which raise the voltage threshold for the appearance of aromas. Such covers often have a flat part between the input and output of the disconnector perpendicular to the axis of the disconnector, associated by rounding with a very smooth cylindrical part, the axis of which merges with the axis of the disconnector.

Lors des manoeuvres d'ouverture et de fermeture d'un sectionneur, à vitesse de manoeuvre lente, un arc de coupure d'abord de préamorçage prend naissance. Cet arc aura tendance à se déplacer sous l'action du champ électrique à la périphérie des capots pare-effluves, puis la racine de l'arc peut sauter sur l'enveloppe métallique située à courte distance. L'arc grèle dû au courant capacitif dégénère alors en arc de puissance, arc de défaut à la terre, à l'intérieur de l'enveloppe.During the opening and closing operations of a disconnector, at slow operating speed, a pre-priming cut-off arc arises. This arc will tend to move under the action of the electric field at the periphery of the corona hoods, then the root of the arc may jump on the metal casing located at a short distance. The hailing arc due to the capacitive current then degenerates into a power arc, an earth fault arc, inside the envelope.

Il est connu par le document DE-A 27 04 385 de placer un écran métallique sous tension autour du contact fixe et à une distance radiale supérieure à la distance de préamorçage. L'arc de préamorçage ou de coupure est alors piégé par l'écran, il ne peut s'étendre jusqu'à l'enveloppe, mais ceci augmente la course du sectionneur.It is known from document DE-A 27 04 385 to place a metallic screen under tension around the fixed contact and at a radial distance greater than the pre-priming distance. The pre-ignition or cut-off arc is then trapped by the screen, it cannot extend to the enclosure, but this increases the stroke of the disconnector.

Il est aussi connu d'utiliser un mécanisme à ouverture et fermeture brusques qui, réduisant considérablement la durée de l'arc, empêche ce dernier de se développer de façon erratique. Un tel dispositif, généralement adopté pour les interrupteurs est très onéreux pour le sectionneur.It is also known to use an abrupt opening and closing mechanism which, considerably reducing the duration of the arc, prevents the arc from developing erratically. Such a device, generally adopted for switches, is very expensive for the disconnector.

L'invention a pour but un sectionneur à manoeuvre lente, dans lequel les contacts fixes et mobiles et les capots pare-effluves ont une forme telle que la longueur de l'arc soit faible, le champ électrique au voisinage de l'axe des contacts soit faible aussi et que l'arc dès sa naissance et au cours de son développement reste dans la zone à faible champ au voisinage de l'axe.The object of the invention is to provide a slow-action disconnector, in which the fixed and mobile contacts and the corona shields have a shape such that the length of the arc is small, the electric field in the vicinity of the axis of the contacts. is also weak and that the arc from its birth and during its development remains in the zone with weak field in the vicinity of the axis.

L'invention a pour objet un sectionneur pour poste blindé sous enveloppe métallique coaxiale remplie de gaz diélectrique comprimé, ledit sectionneur comprenant un contact mobile, coopérant avec un contact fixe, lesdits contacts étant portés chacun par un porte-contact tubulaire fixe coaxial avec l'enveloppe, les extrémités en regard des porte-contact étant munies d'un capot pare-effluves sensiblement hémisphérique présentant un col cylindrique rentrant destiné au passage du contact mobile, ledit contact mobile présentant un embout hémisphérique, caractérisé en ce que le contact fixe comporte un contact semi-mobile à embout hémisphérique de même diamètre que celui de l'embout du contact mobile. En position d'ouverture, l'extrémité de l'embout du contact semi-mobile est de préférence disposée entre le seuil d'entrée du capot pare-effluves et l'extrémité du cercle d'inscription de sa partie hémisphérique.The subject of the invention is a disconnector for a shielded substation in a coaxial metal casing filled with compressed dielectric gas, said disconnector comprising a movable contact cooperating with a fixed contact, said contacts being each carried by a fixed tubular contact holder coaxial with the casing, the opposite ends of the contact carriers being provided with a substantially hemispherical corona hood having a re-entrant cylindrical neck intended for the passage of the movable contact, said movable contact having a hemispherical endpiece, characterized in that the fixed contact comprises a semi-mobile contact with hemispherical tip of the same diameter as that of the tip of the mobile contact. In the open position, the end of the tip of the semi-mobile contact is preferably disposed between the entry threshold of the corona hood and the end of the writing circle of its hemispherical part.

Selon une mise en oeuvre préférée de l'invention, l'embout du contact mobile étant disposé en retrait du seuil d'entrée du col cylindrique du capot pare-effluves, la distance séparant les seuils des capots pare-effluves est comprise entre 50% et 100% du diamètre des parties hémisphériques. Le diamètre des cols cylindriques est de préférence compris entre 20% et 35% du diamètre des parties hémisphériques.According to a preferred implementation of the invention, the tip of the movable contact being disposed back from the entry threshold of the cylindrical neck of the corona hood, the distance separating the thresholds of the corona hoods is between 50% and 100% of the diameter hemispherical parts. The diameter of the cylindrical necks is preferably between 20% and 35% of the diameter of the hemispherical parts.

L'invention sera décrite ci-après plus en détail à l'aide des figures ci-annexées.

  • La figure 1 représente une vue schématique partielle et en coupe axiale d'un sectionneur de poste blindé selon l'invention.
  • La figure 2 représente une vue schématique en coupe axiale d'une variante de capot pare-effluves d'un sectionneur selon l'invention.
  • La figure 3 représente une vue en coupe agrandie d'une variante de l'embout de contact.
The invention will be described below in more detail with the aid of the appended figures.
  • FIG. 1 represents a partial schematic view in axial section of an armored substation disconnector according to the invention.
  • FIG. 2 represents a schematic view in axial section of a variant of the corona hood of a disconnector according to the invention.
  • Figure 3 shows an enlarged sectional view of a variant of the contact tip.

Dans la figure 1 on a représenté une portion de poste blindé, constitué à l'aide d'enveloppes métalliques tubulaires 1, dont les extrémités comportent des brides de raccordement 2, entre lesquelles sont serrés des isolateurs 3 qui supportent des parties actives de l'installation disposées coaxialement. Les enveloppes tubulaires 1 sont remplies d'un gaz diélectrique tel que de l'hexafluorure de soufre sous une pression de trois à cinq bars.In Figure 1 there is shown a portion of an armored substation, made up of tubular metallic envelopes 1, the ends of which have connection flanges 2, between which are insulated isolators 3 which support active parts of the installation arranged coaxially. The tubular casings 1 are filled with a dielectric gas such as sulfur hexafluoride under a pressure of three to five bars.

Les enveloppes 1 contiennent les éléments constitutifs d'un sectionneur dont la partie mobile est disposée à droite et la partie fixe est disposée à gauche.The envelopes 1 contain the constituent elements of a disconnector whose movable part is arranged on the right and the fixed part is arranged on the left.

La partie mobile du sectionneur comprend un contact mobile tubulaire 8, coaxial avec l'enveloppe 1, dont l'extrémité visible comporte un embout hémisphérique 9. Le déplacement axial du contact mobile 8 est commandé par l'intermédiaire d'un mécanisme non représenté sous la dépendance d'un opérateur. Le contact mobile 8 est placé à l'intérieur d'un porte-contact 4 tubulaire supporté par l'isolateur 3. Le contact mobile 8 est relié au porte-contact 4 par l'intermédiaire de contacts glissants 46 disposés dans des rainures circulaires 45 ménagées à l'intérieur du porte-contact 4. Un capot pare-effluves 7 est disposé entre l'isolateur 3 et l'extrémité du porte-contact 4 entourant l'embout 9. Le capot 7 comporte une partie hémisphérique 70 reliant une enveloppe cylindrique 71 à un col cylindrique 72 rentrant vers l'intérieur, les parties cylindriques comportent une génératrice parallèle à l'axe du sectionneur.The movable part of the disconnector comprises a tubular movable contact 8, coaxial with the casing 1, the visible end of which comprises a hemispherical end piece 9. The axial movement of the movable contact 8 is controlled by means of a mechanism not shown under operator dependence. The movable contact 8 is placed inside a tubular contact carrier 4 supported by the insulator 3. The movable contact 8 is connected to the contact carrier 4 by means of sliding contacts 46 arranged in circular grooves 45 formed inside the contact holder 4. A corona hood 7 is disposed between the insulator 3 and the end of the contact holder 4 surrounding the end piece 9. The cover 7 comprises a hemispherical part 70 connecting an envelope cylindrical 71 to a cylindrical neck 72 returning inwards, the cylindrical parts have a generator parallel to the disconnector axis.

La partie fixe du sectionneur comprend un contact semi-mobile tubulaire 13 coaxial avec l'enveloppe 1, dont une extrémité comporte un embout hémisphérique 14 disposé en regard de l'embout 9. Le contact semimobile 13 comporte sur son autre extrémité un collet 15 soumis à un ressort de compression fixe 16 qui a tendance à l'appuyer contre une bague 17 formant butée. Un porte-contact 10 tubulaire, disposé autour du contact semi-mobile 13 et coaxial avec l'enveloppe 1, est supporté par un isolateur similaire à l'isolateur 3, non représenté dans la figure. Le ressort 16 est assujetti à l'intérieur du porte-contact 10 qui supporte du côté opposé une couronne de doigts de contact 12 susceptible de coopérer avec le contact semi-mobile 13 disposé coulissant le long de la bague 17. Un capot pare-effluves 6 analogue au capot 7 est disposé à l'extrémité du porte-contact 10 et en regard du capot 7. Le capot 6 comporte ainsi une partie hémisphérique 60 reliant une enveloppe cylindrique 61 à un col cylindrique 62 rentrant vers l'intérieur, les parties cylindriques comportant une génératrice parallèle à l'axe du sectionneur. Les diamètres des parties cylindriques 61 et 71 d'une part et 62 et 72 d'autre part sont égaux, tandis que les rayons de courbure des parties hémisphériques 60 et 70 sont les mêmes.The fixed part of the disconnector comprises a semi-movable tubular contact 13 coaxial with the casing 1, one end of which comprises a hemispherical end piece 14 disposed opposite the end piece 9. The semi-mobile contact 13 has at its other end a collar 15 subjected to a fixed compression spring 16 which tends to press it against a ring 17 forming a stop. A tubular contact carrier 10, disposed around the semi-mobile contact 13 and coaxial with the casing 1, is supported by an insulator similar to the insulator 3, not shown in the figure. The spring 16 is secured inside the contact carrier 10 which supports on the opposite side a ring of contact fingers 12 capable of cooperating with the semi-mobile contact 13 disposed sliding along the ring 17. A corona hood 6 similar to the cover 7 is arranged at the end of the contact carrier 10 and facing the cover 7. The cover 6 thus comprises a hemispherical part 60 connecting a cylindrical envelope 61 to a cylindrical neck 62 returning inwards, the parts cylindrical with a generator parallel to the axis of the disconnector. The diameters of the cylindrical parts 61 and 71 on the one hand and 62 and 72 on the other are equal, while the radii of curvature of the hemispherical parts 60 and 70 are the same.

En position d'ouverture représentée en figure 1, l'extrémité de l'embout hémisphérique 9 du contact mobile 8 est disposé légèrement en retrait du seuil 73 d'entrée du col cylindrique 72. Par contre l'extrémité de l'embout hémisphérique 14 est disposée sensiblement à mi-distance entre le seuil d'entrée 63 du col cylindrique 62 et ce qui constituerait l'extrémité 64 de la sphère d'inscription de la partie hémisphérique 60.In the open position shown in FIG. 1, the end of the hemispherical end piece 9 of the movable contact 8 is disposed slightly back from the entry threshold 73 of the cylindrical neck 72. On the other hand, the end of the hemispherical end piece 14 is arranged substantially midway between the entry threshold 63 of the cylindrical neck 62 and what would constitute the end 64 of the sphere of inscription of the hemispherical part 60.

Lors de la fermeture du sectionneur, le contact mobile 8 et l'embout 9 sont déplacés de droite à gauche. L'embout 9 prend en particulier la position intermédiaire tracée en tirets et repérée en 59 dans cette position ; la distance entre le capot 6 et l'embout 59 est courte et un arc grèle 20 jaillit entre ces éléments. Le champ électrique déformé au voisinage des embouts 59 et 14 est représenté par les lignes équipotentielles 23 tracées par des tirets, à la partie supérieure de la figure 1. L'arc 20 restant sensiblement parallèle aux lignes équipotentielles n'a pas tendance à se déplacer. Il s'éteint lors de l'entrée en contact galvanique des embouts 9 et 14. Quand le sectionneur a terminé sa course, le contact s'établit entre les doigts de contact 12 et le contact mobile 8, qui a le même diamètre que le contact semi-mobile 13 et qui est repoussé contre l'action du ressort 16 ; son embout 14 prend la position repérée en 54 et l'embout est alors en 69.When the disconnector is closed, the movable contact 8 and the end piece 9 are moved from right to left. The end piece 9 takes in particular the intermediate position traced in dashes and identified at 59 in this position; the distance between the cover 6 and the end piece 59 is short and a hail arc 20 erupts between these elements. The deformed electric field in the vicinity of the end pieces 59 and 14 is represented by the equipotential lines 23 drawn by dashes, at the upper part of Figure 1. The arc 20 remaining substantially parallel to the equipotential lines does not tend to move. It goes out when the ferrules 9 and 14 come into galvanic contact. When the disconnector has completed its stroke, the contact is established between the contact fingers 12 and the movable contact 8, which has the same diameter as the semi-movable contact 13 and which is pushed back against the action of the spring 16; its tip 14 takes the position marked at 54 and the tip is then at 69.

Dans ces conditions, on obtient dans l'intervalle entre les capots 7 et 6 un champ électrique dont les lignes équipotentielles 22, sensiblement symétriques sont matérialisées par des tirets à la partie inférieure de la figure 1.Under these conditions, an electric field is obtained in the interval between the covers 7 and 6, the substantially symmetrical equipotential lines 22 of which are shown by dashes at the bottom of FIG. 1.

Lors de l'ouverture du sectionneur, le déplacement du contact mobile 8 de gauche à droite entraîne le même mouvement de gauche à droite du contact semi-mobile 13 sous l'action du ressort 16 jusqu'à ce que le collet 15 vienne buter contre la bague 17. Après séparation galvanique des embouts 9 et 14 un arc prend naissance entre ces embouts, l'arc étant dans une zone à faible gradient reste rectiligne et se déplace au maximum sur l'extrémité droite du capot 6. La forme sphérique du capot 6 empêche le déplacement de l'arc vers la partie cylindrique 60 et vers l'enveloppe 1. Le courant a une très faible valeur, inférieure à un ampère, et l'arc s'éteint de lui-même dans le gaz diélectrique d'hexafluorure de soufre quand la distance entre les embouts 9 et 14 est suffisante. On obtient de bons résultats quand la distance d'ouverture séparant les capots 7 et l'embout 9 est comprise entre 50% et 100% du diamètre des enveloppes cylindriques 71 et 61, la valeur optimale étant voisine de 75%.When the disconnector opens, the movement of the movable contact 8 from left to right causes the same movement from left to right of the semi-movable contact 13 under the action of the spring 16 until the collar 15 abuts against the ring 17. After galvanic separation of the end pieces 9 and 14 an arc arises between these end pieces, the arc being in a zone with a low gradient remains rectilinear and moves as much as possible on the right end of the cover 6. The spherical shape of the cover 6 prevents the arc from moving towards the cylindrical part 60 and towards the envelope 1. The current has a very low value, less than an ampere, and the arc goes out by itself in the dielectric gas d sulfur hexafluoride when the distance between the nozzles 9 and 14 is sufficient. Good results are obtained when the opening distance separating the covers 7 and the nozzle 9 is between 50% and 100% of the diameter of the cylindrical envelopes 71 and 61, the optimum value being close to 75%.

Le diamètre des embouts hémisphériques 9 et 6 et des contacts tubulaires 8 et 13 est compris entre 20 et 35% du diamètre des parties cylindriques 71 et 61 des capots 7 et 6.The diameter of the hemispherical ends 9 and 6 and of the tubular contacts 8 and 13 is between 20 and 35% of the diameter of the cylindrical parts 71 and 61 of the covers 7 and 6.

Dans la figure 2 on a représenté une variante de réalisation des capots qui donne encore de bons résultats. Le seuil 63 d'entrée du col cylindrique 62 comporte une plage transversale plate dont l'extrémité droite du capot 6 représente une partie plate d'un diamètre, le diamètre extérieur ne dépasse pas la moitié du diamètre de la partie cylindrique 61.In Figure 2 there is shown an alternative embodiment of the covers which still gives good results. The entry threshold 63 of the cylindrical neck 62 has a flat transverse range, the right end of the cover 6 represents a flat part with a diameter, the outside diameter does not exceed half the diameter of the cylindrical part 61.

Dans une autre variante de réalisation du sectionneur, non représentée, on peut aussi simplifier le contact du côté de la partie fixe en supprimant le tube 13, son embout 14 et le ressort 16, mais en conservant les doigts de contact 12 et le capot 6 dont la forme est représentée sur la figure 1. L'arc de préamorçage ou de coupure éclate alors entre l'embout 9 et l'extrémité hémisphérique 61 du capot 6.In another alternative embodiment of the disconnector, not shown, it is also possible to simplify the contact on the side of the fixed part by removing the tube 13, its end piece 14 and the spring 16, but retaining the contact fingers 12 and the cover 6 the shape of which is shown in FIG. 1. The pre-priming or cutting arc then bursts between the end piece 9 and the hemispherical end 61 of the cover 6.

Dans une autre variante l'embout de contact peut présenter un trou borgne. Cette disposition peut intéresser aussi bien l'embout 9 que l'embout 14. La figure 3 représente un tel embout 80 comportant un trou borgne 81 ; les bords du trou sont arrondis, ceci permet de centrer l'arc, en le forçant à s'accrocher sur l'extrémité de l'embout (extrémité arrondie du trou). Les dimensions du trou sont les suivantes pour le meilleur résultat : diamètre du trou d entre 10 et 30% du diamètre maximal D de l'embout 80, rayon r de l'arrondi à l'extrémité du trou compris entre 20 et 50% du diamètre du trou.In another variant, the contact end piece may have a blind hole. This arrangement can interest both the end piece 9 and the end piece 14. FIG. 3 represents such a end piece 80 comprising a blind hole 81; the edges of the hole are rounded, this allows the arc to be centered, forcing it to hang on the end of the end piece (rounded end of the hole). The dimensions of the hole are as follows for the best result: diameter of the hole d between 10 and 30% of the maximum diameter D of the nozzle 80, radius r of the rounding at the end of the hole between 20 and 50% of the hole diameter.

Claims (4)

1/ Sectionneur pour poste blindé à haute tension, sous enveloppe métallique coaxiale (1) remplie de gaz diélectrique comprimé, ledit sectionneur comprenant un contact mobile (8), coopérant avec un contact fixe (13), lesdits contact étant portés chacun par un porte-contact (4, 10) tubulaire fixe coaxial avec l'enveloppe, les extrémités en regard des porte-contact étant munies chacune d'un capot pare-effluves (6, 7) sensiblement hémisphérique présentant un col cylindrique (62, 72) rentrant destiné au passage du contact associé, ledit contact mobile présentant un embout hémisphérique (9), caractérisé en ce que le contact fixe est constitué d'un contact semi- mobile (13) à embout hémisphérique (14) de même diamètre que celui de l'embout (9) du contact mobile (8).1 / Disconnector for high-voltage shielded substation, in a coaxial metal casing (1) filled with compressed dielectric gas, said disconnector comprising a movable contact (8), cooperating with a fixed contact (13), said contacts being each carried by a door -contact (4, 10) fixed tubular coaxial with the envelope, the opposite ends of the contact carriers being each provided with a substantially hemispherical scent hood (6, 7) having a re-entrant cylindrical neck (62, 72) intended for the passage of the associated contact, said movable contact having a hemispherical tip (9), characterized in that the fixed contact consists of a semi-movable contact (13) with hemispherical tip (14) of the same diameter as that of the end piece (9) of the movable contact (8). 2/ Sectionneur selon la revendication 1, caractérisé en ce qu'en position d'ouverture l'extrémité de l'embout (14) du contact semi- mobile (13) est disposée entre le seuil du capot pare-effluves (6) et l'extrémité (64) du cercle d'inscription de sa partie hémisphérique (60).2 / disconnector according to claim 1, characterized in that in the open position the end of the end piece (14) of the semi-mobile contact (13) is disposed between the threshold of the corona hood (6) and the end (64) of the inscription circle of its hemispherical part (60). 3/ Sectionneur selon l'une des revendications 1 à 2, caractérisé en ce que, l'embout (9) du contact mobile (8) étant disposé en retrait du seuil (73) de l'entrée du col cylindrique (72) du capot pare-effluves (7), la distance séparant les seuils (72, 62) des capots (7, 6) pare-effluves est comprise entre 50% et 100% du diamètre des parties hémisphériques (70, 60) de ces capots.3 / disconnector according to one of claims 1 to 2, characterized in that, the end piece (9) of the movable contact (8) being disposed behind the threshold (73) of the inlet of the cylindrical neck (72) of corona hood (7), the distance between the thresholds (72, 62) of the hoods (7, 6) corona hood is between 50% and 100% of the diameter of the hemispherical parts (70, 60) of these hoods. 4/ Sectionneur selon l'une des revendications 1 à 3, caractérisé en ce que l'embout (9, 14) d'au moins un des contacts est percé d'un trou borgne dans son axe, le diamètre de ce trou étant compris entre 10 et 30% du diamètre maximal de l'embout, l'extrémité externe du trou étant arrondie, le rayon de cet arrondi est compris entre 20 et 50% du diamètre du trou.4 / disconnector according to one of claims 1 to 3, characterized in that the end piece (9, 14) of at least one of the contacts is pierced with a blind hole in its axis, the diameter of this hole being included between 10 and 30% of the maximum diameter of the end-piece, the external end of the hole being rounded, the radius of this rounding is between 20 and 50% of the diameter of the hole.
EP19810103784 1980-05-23 1981-05-18 Disconnecting switch for high-voltage metal-enclosed switchgear Expired EP0040781B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8011510 1980-05-23
FR8011510A FR2483121A1 (en) 1980-05-23 1980-05-23 HIGH VOLTAGE SHUTTER POST DISCONNECT

Publications (2)

Publication Number Publication Date
EP0040781A1 true EP0040781A1 (en) 1981-12-02
EP0040781B1 EP0040781B1 (en) 1984-09-19

Family

ID=9242268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19810103784 Expired EP0040781B1 (en) 1980-05-23 1981-05-18 Disconnecting switch for high-voltage metal-enclosed switchgear

Country Status (4)

Country Link
EP (1) EP0040781B1 (en)
CA (1) CA1174717A (en)
DE (1) DE3166132D1 (en)
FR (1) FR2483121A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237146A1 (en) * 1982-08-26 1984-03-01 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau Metal-encapsulated high-voltage switching device
FR2558300A1 (en) * 1984-01-17 1985-07-19 Merlin Gerin High-voltage shielded set isolator.
FR2558301A1 (en) * 1984-01-17 1985-07-19 Merlin Gerin High-voltage shielded set isolator equipped with perforated discharge arrester screens.
FR2592210A1 (en) * 1985-12-20 1987-06-26 Merlin Gerin ISOLATION DISCONNECTOR OF A HIGH VOLTAGE SHIELDED INSTALLATION
WO1992014255A1 (en) * 1991-01-31 1992-08-20 Siemens Aktiengesellschaft Compressed gas switch
DE4210545A1 (en) * 1992-03-31 1993-10-07 Asea Brown Boveri Breaker switch for metal-encapsulated HV switch appts. - has pair of cooperating movable and stationary contact pieces within switch encapsulation, each having pre-ignition contact pin
FR2758916A1 (en) * 1997-01-30 1998-07-31 Gec Alsthom T & D Sa FIREPLACE HOOD
EP2696361A1 (en) * 2012-08-09 2014-02-12 ABB Technology AG Gas-insulated disconnector with shield
FR3002364A1 (en) * 2013-02-20 2014-08-22 Alstom Technology Ltd ELECTRICAL EQUIPMENT COMPRISING A MOBILE ELECTRODE

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196008A (en) * 1937-07-06 1940-04-02 Gen Electric Shielded contact construction for circuit breakers
US2813179A (en) * 1954-10-04 1957-11-12 Westinghouse Electric Corp Disconnecting switch
CH399569A (en) * 1962-11-30 1965-09-30 Comp Generale Electricite High voltage shielded cell
FR1488853A (en) * 1965-08-19 1967-07-13 Siemens Ag High voltage distribution substation, insulated with compressed gas and comprising a sliding disconnector placed in a compact shield
FR1503487A (en) * 1965-12-13 1967-11-24 Westinghouse Electric Corp Disconnector
US4029923A (en) * 1976-01-15 1977-06-14 Westinghouse Electric Corporation Magnetizing current switch
FR2344987A1 (en) * 1976-03-15 1977-10-14 Merlin Gerin EARTHING SWITCH FOR HIGH VOLTAGE SHIELDED SUBSTATION
GB1505485A (en) * 1976-01-15 1978-03-30 Westinghouse Electric Corp Disconnect switch and drive mechanism therefor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2196008A (en) * 1937-07-06 1940-04-02 Gen Electric Shielded contact construction for circuit breakers
US2813179A (en) * 1954-10-04 1957-11-12 Westinghouse Electric Corp Disconnecting switch
CH399569A (en) * 1962-11-30 1965-09-30 Comp Generale Electricite High voltage shielded cell
FR1488853A (en) * 1965-08-19 1967-07-13 Siemens Ag High voltage distribution substation, insulated with compressed gas and comprising a sliding disconnector placed in a compact shield
FR1503487A (en) * 1965-12-13 1967-11-24 Westinghouse Electric Corp Disconnector
US4029923A (en) * 1976-01-15 1977-06-14 Westinghouse Electric Corporation Magnetizing current switch
GB1505485A (en) * 1976-01-15 1978-03-30 Westinghouse Electric Corp Disconnect switch and drive mechanism therefor
FR2344987A1 (en) * 1976-03-15 1977-10-14 Merlin Gerin EARTHING SWITCH FOR HIGH VOLTAGE SHIELDED SUBSTATION

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237146A1 (en) * 1982-08-26 1984-03-01 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau Metal-encapsulated high-voltage switching device
FR2558300A1 (en) * 1984-01-17 1985-07-19 Merlin Gerin High-voltage shielded set isolator.
FR2558301A1 (en) * 1984-01-17 1985-07-19 Merlin Gerin High-voltage shielded set isolator equipped with perforated discharge arrester screens.
FR2592210A1 (en) * 1985-12-20 1987-06-26 Merlin Gerin ISOLATION DISCONNECTOR OF A HIGH VOLTAGE SHIELDED INSTALLATION
EP0236641A1 (en) * 1985-12-20 1987-09-16 Merlin Gerin Isolator for a metal-clad high tension installation
US4748303A (en) * 1985-12-20 1988-05-31 Merlin Gerin Isolating switch of a high voltage metalclad installation
WO1992014255A1 (en) * 1991-01-31 1992-08-20 Siemens Aktiengesellschaft Compressed gas switch
DE4210545A1 (en) * 1992-03-31 1993-10-07 Asea Brown Boveri Breaker switch for metal-encapsulated HV switch appts. - has pair of cooperating movable and stationary contact pieces within switch encapsulation, each having pre-ignition contact pin
FR2758916A1 (en) * 1997-01-30 1998-07-31 Gec Alsthom T & D Sa FIREPLACE HOOD
EP0856862A1 (en) * 1997-01-30 1998-08-05 Gec Alsthom T & D Sa Discharge preventing cap
EP2696361A1 (en) * 2012-08-09 2014-02-12 ABB Technology AG Gas-insulated disconnector with shield
FR3002364A1 (en) * 2013-02-20 2014-08-22 Alstom Technology Ltd ELECTRICAL EQUIPMENT COMPRISING A MOBILE ELECTRODE
WO2014128103A1 (en) * 2013-02-20 2014-08-28 Alstom Technology Ltd Electrical appliance comprising a movable electrode

Also Published As

Publication number Publication date
FR2483121A1 (en) 1981-11-27
EP0040781B1 (en) 1984-09-19
DE3166132D1 (en) 1984-10-25
CA1174717A (en) 1984-09-18
FR2483121B1 (en) 1982-12-17

Similar Documents

Publication Publication Date Title
EP0388323B1 (en) Autoexpansion electric circuit breaker with insulating gas
EP0543681B1 (en) Middle voltage circuit breaker for inside or outside
EP0040781B1 (en) Disconnecting switch for high-voltage metal-enclosed switchgear
CH634949A5 (en) DEVICE FOR INSERTING A RESISTANCE TO THE ONLY CLOSING OF AN INTERRUPTION APPARATUS.
CA2044517C (en) Integral varistor airconnect switch
FR2491675A1 (en) Gas blast type high voltage circuit breaker - has operating piston moving contact ring axially into set of contacts held on hemispherical support
FR2512267A1 (en) COMPRESSED GAS CIRCUIT BREAKER WITH OPENING AND CLOSING RESISTORS
CA2206950C (en) High-voltage switch with resistor insertion upon closing
FR2576144A1 (en) HIGH VOLTAGE, COMPRESSED GAS, LOW-ENERGY CIRCUIT BREAKER
FR2576143A1 (en) HIGH-VOLTAGE, COMPRESSED GAS, CIRCUIT BREAKER ASSISTED BY THE ARC THERMAL EFFECT AND WITH DOUBLE MOTION
EP0759629B1 (en) Circuit breaker with closing resistor and insertion device
EP0785562B1 (en) Circuit breaker having contacts with double movement
CA2017127C (en) High current rating medium voltage circuit-breaker
EP0515267B1 (en) Gas-blast load-break middle and high voltage switch
EP0450567B1 (en) High- or medium voltage circuit breaker with abutting arcing contacts
FR2814275A1 (en) GAS INSULATED CIRCUIT BREAKER WITH AN INTEGRATED ELECTRONIC CURRENT TRANSFORMER
CA2214966C (en) High-voltage circuit breaker with damper
EP0236641B1 (en) Isolator for a metal-clad high tension installation
FR2612683A1 (en) High-voltage circuit breaker with closure resistor
FR2558300A1 (en) High-voltage shielded set isolator.
EP0516518A1 (en) Device for protection against the effects of flash-over for electrical cable end
CA1273043A (en) Closing resistor dielectric gas high voltage circuit-breaker
EP1512160B1 (en) High voltage shielded gear comprising a circuit breaker with closure resistor mounted in a conducting bar
FR2737937A1 (en) High tension circuit breaker with double movement within reduced volume
US5198630A (en) Resistance insertion type 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

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19820526

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB IT

REF Corresponds to:

Ref document number: 3166132

Country of ref document: DE

Date of ref document: 19841025

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
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940422

Year of fee payment: 14

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

Ref country code: DE

Payment date: 19940526

Year of fee payment: 14

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

Ref country code: GB

Effective date: 19950518

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950518

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

Ref country code: DE

Effective date: 19960201