EP0701264A1 - Gas blast circuitbreaker with semi mobile piston - Google Patents

Gas blast circuitbreaker with semi mobile piston Download PDF

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Publication number
EP0701264A1
EP0701264A1 EP95401992A EP95401992A EP0701264A1 EP 0701264 A1 EP0701264 A1 EP 0701264A1 EP 95401992 A EP95401992 A EP 95401992A EP 95401992 A EP95401992 A EP 95401992A EP 0701264 A1 EP0701264 A1 EP 0701264A1
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EP
European Patent Office
Prior art keywords
circuit breaker
pressure wall
cylinder
pressure
tube
Prior art date
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Granted
Application number
EP95401992A
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German (de)
French (fr)
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EP0701264B1 (en
Inventor
Michel Perret
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Grid Solutions SAS
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GEC Alsthom T&D SA
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Publication of EP0701264A1 publication Critical patent/EP0701264A1/en
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Publication of EP0701264B1 publication Critical patent/EP0701264B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/905—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the compression volume being formed by a movable cylinder and a semi-mobile piston

Definitions

  • the present invention relates to a semi-movable piston self-blowing circuit breaker.
  • a circuit breaker of the self-blowing type comprising a casing filled with a dielectric gas under pressure, two arcing contacts cooperating with each other, at least one forming part of a movable contact assembly integral with an operating member and adapted to be moved axially in the envelope between a closed position and an open position, the movable contact assembly consisting of a first tube and a second tube coaxial with the first tube to delimit, on either side of a first ring connecting the first and second tubes, a blowing chamber and a compression chamber communicating with the blowing chamber and closed by a pressure wall of a semi-mobile piston urged by a spring resting on a fixed flange.
  • the gas in the compression chamber is compressed because the distance between the piston and the ring separating the compression chamber from the blowing chamber decreases. During this movement, it is the spring which keeps the semi-mobile piston in a fixed position against the pressure of the gas against its pressure wall in the compression chamber. It is therefore necessary to provide a sufficient force spring. This force is transmitted in the kinematics of the device and is generally collected by the operating member, generally a connecting rod, and by levers cooperating with the latter. An opening operation therefore requires a certain energy consumption.
  • the object of the invention is to reduce the energy consumption of the circuit breaker during an opening operation.
  • the piston consists of two parts, a first part comprising a first pressure wall and a second part comprising a second pressure wall, with a front surface smaller than that of the first pressure wall, these two adjacent walls forming the pressure wall of the piston and the first part being supported in the same direction as the direction of opening against the second part along an inclined surface, in the closed position of the circuit breaker.
  • said first part consists of a cylinder sliding on the first tube and provided at its end opposite the contacts with an annular flange intended to come into abutment against said fixed flange in the closed position of the circuit breaker, said annular pressure wall integral with said cylinder at its other end and with a cylindrical part coaxial with said cylinder, integral with said pressure wall by one of its ends and having a surface inclined at its other end.
  • said second part consists of a section of cylinder coaxial with said cylinder and provided at its end opposite the contacts with an inclined surface complementary to the inclined surface of the first part and of said second pressure wall integral with the other. end of said cylinder section.
  • said cylinder section consists of a tulip of fingers and the second pressure wall projects in the compression chamber relative to the first pressure wall, in the closed position of the circuit breaker.
  • said second part is urged by a spring bearing by its end opposite the contacts on said fixed flange and, preferably, said first part is also urged by a spring bearing by its end opposite the contacts on said fixed flange.
  • Figure 1 is a longitudinal sectional view of a circuit breaker according to the invention in the closed position.
  • Figure 2 is a longitudinal sectional view of a circuit breaker according to the invention during opening.
  • Figure 3 is a longitudinal sectional view of a circuit breaker according to the invention in the open position.
  • a breaking chamber will be described, it being understood that a high voltage circuit breaker, may comprise, for each phase, several breaking chambers of the type which will be described.
  • FIGS. 1 to 3 the same references designate identical elements.
  • the reference 1 designates a preferably insulating envelope, for example of porcelain, filled with a gas with good dielectric properties, for example sulfur hexafluoride under a pressure of a few bars.
  • the circuit breaker includes a fixed assembly and a movable contact assembly.
  • the fixed assembly comprises an arcing contact 3, consisting of a metal tube, the end 3A of which is made of a material resistant to the effects of the arcing, for example an alloy based on tungsten.
  • the fixed assembly also includes a fixed permanent contact 4 consisting of fingers. The arcing contact and the fixed permanent contact are electrically connected to a first socket, not shown.
  • the movable contact assembly comprises an operating part 6 passing through the chamber in a sealed manner and connected to a mechanism not shown.
  • a metal assembly comprising two coaxial tubes 7 and 8, the tube 8 having a diameter larger than the tube 7.
  • the two tubes 7, 8 are connected together by a metal ring 9. These tubes and this crown are preferably made in one piece from machining.
  • the tube 7 constitutes the movable arcing contact. Its end 7A is made of a material resistant to the effects of the arc and cooperates with the contact 3, 3A.
  • the tube 8 has one end 8A carrying a blowing nozzle 10 made of insulating material.
  • the tubular portion 8A constitutes the permanent movable contact of the circuit breaker and cooperates, when the circuit breaker is in the engaged position (closed position) with the fingers 4 as shown in FIG. 1.
  • the end 8A of the tube 8, the blowing nozzle 10, the tube 7 and the crown 9 define a blowing chamber 17.
  • the crown 9, the tubes 7 and 8 and a piston 11 define a compression chamber 18 separated from the blowing chamber 17 by the crown 9.
  • the piston slides axially between the tubes 7 and 8 in a sealed manner.
  • the tube 8 slides on a fixed cylinder 10 having an inner annular flange 10A.
  • the piston 11 consists of two parts 12, 13, a first part 12 comprising a large pressure wall 12A, called the first pressure wall, and a second part 13 comprising a small pressure wall 13A, called the second pressure wall, these two adjacent walls forming the pressure wall of the piston 11.
  • These two parts 12, 13 are in mutual contact against one another along an inclined surface, in the closed position of the circuit breaker, the first part 12 being pressing against the second part 13 in the same direction as the opening direction.
  • the first part 12 consists of a cylinder 12B sliding on the first tube 7 and provided at its end opposite the contacts with an annular flange 12C intended to abut against the fixed flange 10A in the closed position of the circuit breaker, of said wall 12A annular pressure integral with said cylinder 12B at its other end and a cylindrical portion 12D coaxial with the cylinder 12B, integral with the pressure wall 12A by one of its ends and having an inclined surface 12E at its other end.
  • This first part 12 is biased by a spring 15 in support at its opposite end to the contacts on the fixed flange 10A and slides on the tube 7.
  • the second part 13 consists of a cylinder section 13B coaxial with said cylinder and provided at its end opposite the contacts with an inclined surface 13C complementary to the inclined surface 12E of the first part 12 and said second pressure wall 12A integral from the other end of the cylinder section 13B.
  • the cylinder section 13B preferably consists of a tulip of arms. This second part 13 is biased by a spring 14 bearing at its end opposite the contacts on the fixed flange 10A and slides on the tube 8 and on the cylinder 10.
  • the angle of inclination relative to the horizontal of the inclined surfaces is less than 30 °.
  • the pressure force R exerted by the compressed gas in the compression chamber 18 on the pressure wall 12A of the first part 12 of the piston 11 decomposes on the inclined surface 13C into a reduced horizontal component F collected by the springs 14 and 15.
  • the pressure wall 13A of the second part 13 being small, the pressure force exerted by the compressed gas in the compression chamber 18 on this pressure wall 13A is reduced and is collected by the spring 14.
  • the two springs 14 and 15 can therefore be weak positioning springs, of much less force than the springs of the prior art semi-movable piston in one piece.
  • the vertical component N on the surface 13C is on the other hand significant and tends to press the fingers of the cylindrical section 13B against the fixed cylinder 10 and therefore to lock the second part 13 in a fixed position, which immobilizes the piston 11.
  • the pressure wall 13A is also projecting into the compression chamber 18 by compared to the pressure wall 12A. When the crown 9 reaches the wall 13A, as shown in FIG. 2, it pushes this wall 13A which separates the inclined surfaces 12E and 13C and cancels the vertical component N and the piston 11 as a whole is easily driven in the end of the opening displacement.
  • the gas is not compressed in the compression chamber 18 during the entire movement of the movable contact assembly. From the moment when the piston moves with the movable contact assembly, its pressure wall abutting against the crown 9, the amount of energy required to operate the movable contact assembly is very reduced because that there is no more gas compression.

Landscapes

  • Circuit Breakers (AREA)
  • Switches With Compound Operations (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Reciprocating Pumps (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The arc-extinguishing circuit breaker comprises an envelope (1) filled with dielectric gas under pressure. The envelope contains two arc contacts (3A,7A) cooperating together, and includes a mobile contract assembly formed by a first tube (7) and a second coaxial tube (8) defining an extinguishing chamber (17). A compression chamber (18) communicates with the extinction chamber (17) and is closed by a semi-mobile pressure piston wall (11). The piston (11) consists of two parts (12,13) comprising first and second pressure walls (12A,13A), the second being of smaller surface area than the first.

Description

La présente invention concerne un disjoncteur à auto-soufflage à piston semi-mobile.The present invention relates to a semi-movable piston self-blowing circuit breaker.

Elle concerne plus précisément un disjoncteur du type à auto-soufflage, comprenant une enveloppe remplie d'un gaz diélectrique sous pression, deux contacts d'arc coopérant entre eux, l'un au moins faisant partie d'un ensemble de contact mobile solidaire d'un organe de manoeuvre et adapté pour être déplacé axialement dans l'enveloppe entre une position de fermeture et une position d'ouverture, l'ensemble de contact mobile étant constitué par un premier tube et un second tube coaxial au premier tube pour délimiter, de part et d'autre d'une première couronne reliant le premier et le second tubes, une chambre de soufflage et une chambre de compression communiquant avec la chambre de soufflage et fermée par une paroi de pression d'un piston semi-mobile sollicité par un ressort en appui sur une bride fixe.It relates more precisely to a circuit breaker of the self-blowing type, comprising a casing filled with a dielectric gas under pressure, two arcing contacts cooperating with each other, at least one forming part of a movable contact assembly integral with an operating member and adapted to be moved axially in the envelope between a closed position and an open position, the movable contact assembly consisting of a first tube and a second tube coaxial with the first tube to delimit, on either side of a first ring connecting the first and second tubes, a blowing chamber and a compression chamber communicating with the blowing chamber and closed by a pressure wall of a semi-mobile piston urged by a spring resting on a fixed flange.

Pendant une opération d'ouverture, le gaz dans la chambre de compression est comprimé du fait que la distance entre le piston et la couronne séparant la chambre de compression de la chambre de soufflage décroît. Durant ce déplacement, c'est le ressort qui maintient le piston semi-mobile en position fixe à l'encontre de la pression du gaz contre sa paroi de pression dans la chambre de compression. Il est donc nécessaire de prévoir un ressort d'effort suffisant. Cet effort se transmet dans la cinématique de l'appareil et est en général encaissé par l'organe de manoeuvre, en général une bielle, et par des leviers coopérant avec cette dernière. Une opération d'ouverture nécessite donc une certaine consommation d'énergie.During an opening operation, the gas in the compression chamber is compressed because the distance between the piston and the ring separating the compression chamber from the blowing chamber decreases. During this movement, it is the spring which keeps the semi-mobile piston in a fixed position against the pressure of the gas against its pressure wall in the compression chamber. It is therefore necessary to provide a sufficient force spring. This force is transmitted in the kinematics of the device and is generally collected by the operating member, generally a connecting rod, and by levers cooperating with the latter. An opening operation therefore requires a certain energy consumption.

Le but de l'invention est de réduire la consommation d'énergie du disjoncteur pendant une opération d'ouverture.The object of the invention is to reduce the energy consumption of the circuit breaker during an opening operation.

Pour ce faire, conformément à l'invention, le piston est constitué de deux parties, une première partie comportant une première paroi de pression et une seconde partie comportant une seconde paroi de pression, de surface frontale inférieure à celle de la première paroi de pression, ces deux parois adjacentes formant la paroi de pression du piston et la première partie étant en appui dans le même sens que le sens d'ouverture contre la seconde partie selon une surface inclinée, en position fermée du disjoncteur.To do this, in accordance with the invention, the piston consists of two parts, a first part comprising a first pressure wall and a second part comprising a second pressure wall, with a front surface smaller than that of the first pressure wall, these two adjacent walls forming the pressure wall of the piston and the first part being supported in the same direction as the direction of opening against the second part along an inclined surface, in the closed position of the circuit breaker.

Selon un mode de réalisation préféré, ladite première partie est constitué d'un cylindre coulissant sur le premier tube et pourvu à son extrémité opposé aux contacts d'une bride annulaire destinée à venir en butée contre ladite bride fixe en position fermée du disjoncteur, de ladite paroi de pression annulaire solidaire dudit cylindre à son autre extrémité et d'une partie cylindrique coaxiale audit cylindre, solidaire de ladite paroi de pression par une de ses extrémités et comportant une surface inclinée à son autre extrémité.According to a preferred embodiment, said first part consists of a cylinder sliding on the first tube and provided at its end opposite the contacts with an annular flange intended to come into abutment against said fixed flange in the closed position of the circuit breaker, said annular pressure wall integral with said cylinder at its other end and with a cylindrical part coaxial with said cylinder, integral with said pressure wall by one of its ends and having a surface inclined at its other end.

Avantageusement, ladite seconde partie est constituée d'un tronçon de cylindre coaxial audit cylindre et pourvu à son extrémité opposée aux contacts d'une surface inclinée complémentaire à la surface inclinée de la première partie et de ladite seconde paroi de pression solidaire de l'autre extrémité dudit tronçon de cylindre.Advantageously, said second part consists of a section of cylinder coaxial with said cylinder and provided at its end opposite the contacts with an inclined surface complementary to the inclined surface of the first part and of said second pressure wall integral with the other. end of said cylinder section.

Avantageusement, ledit tronçon de cylindre est constitué d'une tulipe de doigts et la seconde paroi de pression est en saillie dans la chambre de compression par rapport à la première paroi de pression, en position fermée du disjoncteur.Advantageously, said cylinder section consists of a tulip of fingers and the second pressure wall projects in the compression chamber relative to the first pressure wall, in the closed position of the circuit breaker.

Par ailleurs, ladite seconde partie est sollicitée par un ressort en appui par son extrémité opposée aux contacts sur ladite bride fixe et, de préférence, ladite première partie est également sollicitée par un ressort en appui par son extrémité opposée aux contacts sur ladite bride fixe.Furthermore, said second part is urged by a spring bearing by its end opposite the contacts on said fixed flange and, preferably, said first part is also urged by a spring bearing by its end opposite the contacts on said fixed flange.

Les fonctions et avantages de ces caractéristiques apparaîtront à la lecture de la description qui suit où l'invention est décrite ci-après plus en détail à l'aide de figures ne représentant qu'un mode de réalisation préféré de l'invention.The functions and advantages of these characteristics will appear on reading the following description where the invention is described below in more detail using figures showing only a preferred embodiment of the invention.

La figure 1 est une vue en coupe longitudinale d'un disjoncteur conforme à l'invention en position fermée.Figure 1 is a longitudinal sectional view of a circuit breaker according to the invention in the closed position.

La figure 2 est une vue en coupe longitudinale d'un disjoncteur conforme à l'invention en cours d'ouverture.Figure 2 is a longitudinal sectional view of a circuit breaker according to the invention during opening.

La figure 3 est une vue en coupe longitudinale d'un disjoncteur conforme à l'invention en position ouverte.Figure 3 is a longitudinal sectional view of a circuit breaker according to the invention in the open position.

Dans ce qui suit, on décrira une chambre de coupure, étant entendu qu'un disjoncteur à haute tension, peut comporter, pour chaque phase, plusieurs chambres de coupure du type qui va être décrit. Sur les figures 1 à 3, les mêmes références désignent des éléments identiques.In what follows, a breaking chamber will be described, it being understood that a high voltage circuit breaker, may comprise, for each phase, several breaking chambers of the type which will be described. In FIGS. 1 to 3, the same references designate identical elements.

Sur les figures, la référence 1 désigne une enveloppe de préférence isolante, par exemple en porcelaine, remplie d'un gaz à bonnes propriétés diélectriques, par exemple de l'hexafluorure de soufre sous une pression de quelques bars.In the figures, the reference 1 designates a preferably insulating envelope, for example of porcelain, filled with a gas with good dielectric properties, for example sulfur hexafluoride under a pressure of a few bars.

Le disjoncteur comprend un ensemble fixe et un ensemble de contact mobile.The circuit breaker includes a fixed assembly and a movable contact assembly.

L'ensemble fixe comprend un contact d'arc 3, constitué d'un tube métallique dont l'extrémité 3A est réalisée en un matériau résistant aux effets de l'arc, par exemple un alliage à base de tungstène. L'ensemble fixe comprend également un contact permanent fixe 4 constitué de doigts. Le contact d'arc et le contact permanent fixe sont reliés électriquement à une première prise de courant, non représentée.The fixed assembly comprises an arcing contact 3, consisting of a metal tube, the end 3A of which is made of a material resistant to the effects of the arcing, for example an alloy based on tungsten. The fixed assembly also includes a fixed permanent contact 4 consisting of fingers. The arcing contact and the fixed permanent contact are electrically connected to a first socket, not shown.

L'ensemble de contact mobile comprend une pièce de manoeuvre 6 traversant la chambre de manière étanche et reliée à un mécanisme non représenté. A la pièce 6 est relié un ensemble métallique comprenant deux tubes 7 et 8 coaxiaux, le tube 8 ayant un diamètre plus grand que le tube 7. Les deux tubes 7, 8 sont reliés entre eux par une couronne métallique 9. Ces tubes et cette couronne sont de préférence réalisés en une seule pièce venue d'usinage.The movable contact assembly comprises an operating part 6 passing through the chamber in a sealed manner and connected to a mechanism not shown. To the part 6 is connected a metal assembly comprising two coaxial tubes 7 and 8, the tube 8 having a diameter larger than the tube 7. The two tubes 7, 8 are connected together by a metal ring 9. These tubes and this crown are preferably made in one piece from machining.

Le tube 7 constitue le contact d'arc mobile. Son extrémité 7A est réalisée en un matériau résistant aux effets de l'arc et coopère avec le contact 3, 3A. Le tube 8 possède une extrémité 8A portant une buse de soufflage 10 en matériau isolant. La portion tubulaire 8A constitue le contact mobile permanent du disjoncteur et coopère, lorsque le disjoncteur est en position enclenchée (position de fermeture) avec les doigts 4 comme le montre la figure 1.The tube 7 constitutes the movable arcing contact. Its end 7A is made of a material resistant to the effects of the arc and cooperates with the contact 3, 3A. The tube 8 has one end 8A carrying a blowing nozzle 10 made of insulating material. The tubular portion 8A constitutes the permanent movable contact of the circuit breaker and cooperates, when the circuit breaker is in the engaged position (closed position) with the fingers 4 as shown in FIG. 1.

L'extrémité 8A du tube 8, la buse de soufflage 10, le tube 7 et la couronne 9 délimitent une chambre de soufflage 17. La couronne 9, les tubes 7 et 8 et un piston 11 délimitent une chambre de compression 18 séparée de la chambre de soufflage 17 par la couronne 9. Le piston coulisse axialement entre les tubes 7 et 8 de façon étanche.The end 8A of the tube 8, the blowing nozzle 10, the tube 7 and the crown 9 define a blowing chamber 17. The crown 9, the tubes 7 and 8 and a piston 11 define a compression chamber 18 separated from the blowing chamber 17 by the crown 9. The piston slides axially between the tubes 7 and 8 in a sealed manner.

Le tube 8 coulisse sur un cylindre 10 fixe comportant une bride annulaire 10A intérieure.The tube 8 slides on a fixed cylinder 10 having an inner annular flange 10A.

Selon l'invention, le piston 11 est constitué de deux parties 12, 13, une première partie 12 comportant une grande paroi de pression 12A, dite première paroi de pression, et une seconde partie 13 comportant une petite paroi de pression 13A, dite seconde paroi de pression, ces deux parois adjacentes formant la paroi de pression du piston 11. Ces deux parties 12, 13 sont en appui mutuel l'une contre l'autre selon une surface inclinée, en position fermée du disjoncteur, la première partie 12 étant en appui contre la seconde partie 13 dans le même sens que le sens d'ouverture.According to the invention, the piston 11 consists of two parts 12, 13, a first part 12 comprising a large pressure wall 12A, called the first pressure wall, and a second part 13 comprising a small pressure wall 13A, called the second pressure wall, these two adjacent walls forming the pressure wall of the piston 11. These two parts 12, 13 are in mutual contact against one another along an inclined surface, in the closed position of the circuit breaker, the first part 12 being pressing against the second part 13 in the same direction as the opening direction.

La première partie 12 est constituée d'un cylindre 12B coulissant sur le premier tube 7 et pourvu à son extrémité opposé aux contacts d'une bride annulaire 12C destinée à venir en butée contre la bride fixe 10A en position fermée du disjoncteur, de ladite paroi de pression 12A annulaire solidaire dudit cylindre 12B à son autre extrémité et d'une partie cylindrique 12D coaxiale au cylindre 12B, solidaire de la paroi de pression 12A par une de ses extrémités et comportant une surface inclinée 12E à son autre extrémité. Cette première partie 12 est sollicitée par un ressort 15 en appui par son extrémité opposée aux contacts sur la bride fixe 10A et coulisse sur le tube 7.The first part 12 consists of a cylinder 12B sliding on the first tube 7 and provided at its end opposite the contacts with an annular flange 12C intended to abut against the fixed flange 10A in the closed position of the circuit breaker, of said wall 12A annular pressure integral with said cylinder 12B at its other end and a cylindrical portion 12D coaxial with the cylinder 12B, integral with the pressure wall 12A by one of its ends and having an inclined surface 12E at its other end. This first part 12 is biased by a spring 15 in support at its opposite end to the contacts on the fixed flange 10A and slides on the tube 7.

La seconde partie 13 est constituée d'un tronçon de cylindre 13B coaxial audit cylindre et pourvu à son extrémité opposée aux contacts d'une surface inclinée 13C complémentaire à la surface inclinée 12E de la première partie 12 et de ladite seconde paroi de pression 12A solidaire de l'autre extrémité du tronçon de cylindre 13B. Le tronçon de cylindre 13B est de préférence constitué d'une tulipe de bras. Cette seconde partie 13 est sollicitée par un ressort 14 en appui par son extrémité opposée aux contacts sur la bride fixe 10A et coulisse sur le tube 8 et sur le cylindre 10.The second part 13 consists of a cylinder section 13B coaxial with said cylinder and provided at its end opposite the contacts with an inclined surface 13C complementary to the inclined surface 12E of the first part 12 and said second pressure wall 12A integral from the other end of the cylinder section 13B. The cylinder section 13B preferably consists of a tulip of arms. This second part 13 is biased by a spring 14 bearing at its end opposite the contacts on the fixed flange 10A and slides on the tube 8 and on the cylinder 10.

Selon le mode de réalisation préféré, l'angle d'inclinaison par rapport à l'horizontale des surfaces inclinées est inférieur à 30°.According to the preferred embodiment, the angle of inclination relative to the horizontal of the inclined surfaces is less than 30 °.

Grâce à l'agencement de surfaces inclinées conforme à l'invention, lors de l'ouverture, comme visible sur la figure 2, l'effort de pression R exercé par le gaz comprimé dans la chambre de compression 18 sur la paroi de pression 12A de la première partie 12 du piston 11 se décompose sur la surface inclinée 13C en une composante horizontale F réduite encaissée par les ressorts 14 et 15. La paroi de pression 13A de la seconde partie 13 étant petite, l'effort de pression exercé par le gaz comprimé dans la chambre de compression 18 sur cette paroi de pression 13A est réduit et est encaissé par le ressort 14. Les deux ressorts 14 et 15 peuvent donc être de faibles ressorts de positionnement, de force bien moins importante que les ressorts de l'art antérieur à piston semi-mobile d'une pièce.Thanks to the arrangement of inclined surfaces according to the invention, during the opening, as visible in FIG. 2, the pressure force R exerted by the compressed gas in the compression chamber 18 on the pressure wall 12A of the first part 12 of the piston 11 decomposes on the inclined surface 13C into a reduced horizontal component F collected by the springs 14 and 15. The pressure wall 13A of the second part 13 being small, the pressure force exerted by the compressed gas in the compression chamber 18 on this pressure wall 13A is reduced and is collected by the spring 14. The two springs 14 and 15 can therefore be weak positioning springs, of much less force than the springs of the prior art semi-movable piston in one piece.

De plus, la composante verticale N sur la surface 13C est par contre importante et tend à presser les doigts du tronçon cylindrique 13B contre le cylindre fixe 10 et donc à bloquer en position fixe la seconde partie 13, ce qui immobilise le piston 11. La paroi de pression 13A est par ailleurs en saillie dans la chambre de compression 18 par rapport à la paroi de pression 12A. Lorsque la couronne 9 atteint la paroi 13A, comme représenté sur la figure 2, elle pousse cette paroi 13A ce qui désolidarise les surfaces inclinées 12E et 13C et annule la composante verticale N et le piston 11 dans son ensemble est facilement entraîné dans la fin du déplacement d'ouverture.In addition, the vertical component N on the surface 13C is on the other hand significant and tends to press the fingers of the cylindrical section 13B against the fixed cylinder 10 and therefore to lock the second part 13 in a fixed position, which immobilizes the piston 11. The pressure wall 13A is also projecting into the compression chamber 18 by compared to the pressure wall 12A. When the crown 9 reaches the wall 13A, as shown in FIG. 2, it pushes this wall 13A which separates the inclined surfaces 12E and 13C and cancels the vertical component N and the piston 11 as a whole is easily driven in the end of the opening displacement.

Avantageusement, comme visible sur les figures 2 et 3, le gaz n'est pas comprimé dans la chambre de compression 18 pendant tout le déplacement de l'ensemble de contact mobile. A partir de l'instant où le piston se déplace avec l'ensemble de contact mobile, sa paroi de pression venant en butée contre la couronne 9, la quantité d'énergie nécessaire pour manoeuvrer l'ensemble de contact mobile est très réduite du fait qu'il n'y a plus de compression de gaz.Advantageously, as can be seen in FIGS. 2 and 3, the gas is not compressed in the compression chamber 18 during the entire movement of the movable contact assembly. From the moment when the piston moves with the movable contact assembly, its pressure wall abutting against the crown 9, the amount of energy required to operate the movable contact assembly is very reduced because that there is no more gas compression.

Claims (7)

1) Disjoncteur du type à auto-soufflage, comprenant une enveloppe (1) remplie d'un gaz diélectrique sous pression, deux contacts d'arc (3A, 7A) coopérant entre eux, l'un au moins faisant partie d'un ensemble de contact mobile solidaire d'un organe de manoeuvre (6) et adapté pour être déplacé axialement dans l'enveloppe (1) entre une position de fermeture et une position d'ouverture, l'ensemble de contact mobile étant constitué par un premier tube (7) et un second tube (8) coaxial au premier tube pour délimiter, de part et d'autre d'une première couronne (9) reliant le premier et le second tubes, une chambre de soufflage (17) et une chambre de compression (18) communiquant avec la chambre de soufflage (17) et fermée par une paroi de pression d'un piston (11) semi-mobile sollicité par au moins un ressort en appui sur une bride fixe, caractérisé en ce que le piston (11) est constitué de deux parties (12, 13), une première partie (12) comportant une première paroi de pression (12A) et une seconde partie (13) comportant une seconde paroi de pression (13A), de surface frontale inférieure à celle de la première paroi de pression, ces deux parois adjacentes formant la paroi de pression du piston (11) et la première partie (12) étant en appui dans le même sens que le sens d'ouverture contre la seconde partie (13) selon une surface inclinée, en position fermée du disjoncteur. 1) Circuit-breaker of the self-blowing type, comprising a casing (1) filled with a dielectric gas under pressure, two arcing contacts (3A, 7A) cooperating with each other, at least one being part of an assembly contact movable integral with an operating member (6) and adapted to be moved axially in the casing (1) between a closed position and an open position, the movable contact assembly being constituted by a first tube (7) and a second tube (8) coaxial with the first tube to delimit, on either side of a first ring (9) connecting the first and the second tubes, a blowing chamber (17) and a compression (18) communicating with the blowing chamber (17) and closed by a pressure wall of a semi-mobile piston (11) urged by at least one spring bearing on a fixed flange, characterized in that the piston ( 11) consists of two parts (12, 13), a first part (12) comprising a first wall of almost sion (12A) and a second part (13) comprising a second pressure wall (13A), of front surface smaller than that of the first pressure wall, these two adjacent walls forming the pressure wall of the piston (11) and the first part (12) being supported in the same direction as the direction of opening against the second part (13) on an inclined surface, in the closed position of the circuit breaker. 2) Disjoncteur selon la revendication 1, caractérisé en ce que ladite première partie (12) est constituée d'un cylindre (12B) coulissant sur le premier tube (7) et pourvu à son extrémité opposé aux contacts d'une bride annulaire (12C) destinée à venir en butée contre ladite bride fixe (10A) en position fermée du disjoncteur, de ladite paroi de pression (12A) annulaire solidaire dudit cylindre (12B) à son autre extrémité et d'une partie cylindrique (12D) coaxiale audit cylindre (12B), solidaire de ladite paroi de pression (12A) par une de ses extrémités et comportant une surface inclinée (12E) à son autre extrémité. 2) Circuit breaker according to claim 1, characterized in that said first part (12) consists of a cylinder (12B) sliding on the first tube (7) and provided at its end opposite the contacts with an annular flange (12C ) intended to abut against said fixed flange (10A) in the closed position of the circuit breaker, of said annular pressure wall (12A) integral with said cylinder (12B) at its other end and with a cylindrical part (12D) coaxial with said cylinder (12B), integral with said wall of pressure (12A) by one of its ends and having an inclined surface (12E) at its other end. 3) Disjoncteur selon la revendication 2, caractérisé en ce que ladite seconde partie (13) est constituée d'un tronçon de cylindre (13B) coaxial audit cylindre et pourvu à son extrémité opposée aux contacts d'une surface inclinée (13C) complémentaire à la surface inclinée (12E) de la première partie (12) et de ladite seconde paroi de pression (12A) solidaire de l'autre extrémité dudit tronçon de cylindre (13B). 3) Circuit breaker according to claim 2, characterized in that said second part (13) consists of a cylinder section (13B) coaxial with said cylinder and provided at its end opposite the contacts with an inclined surface (13C) complementary to the inclined surface (12E) of the first part (12) and of said second pressure wall (12A) secured to the other end of said cylinder section (13B). 4) Disjoncteur selon la revendication 3, caractérisé en ce que ledit tronçon de cylindre (13B) est constitué d'une tulipe de doigts. 4) Circuit breaker according to claim 3, characterized in that said cylinder section (13B) consists of a tulip of fingers. 5) Disjoncteur selon l'une des revendications précédentes, caractérisé en ce que la seconde paroi de pression (13A) est en saillie dans la chambre de compression (18) par rapport à la première paroi de pression (12A), en position fermée du disjoncteur. 5) Circuit breaker according to one of the preceding claims, characterized in that the second pressure wall (13A) projects into the compression chamber (18) relative to the first pressure wall (12A), in the closed position of the circuit breaker. 6) Disjoncteur selon l'une des revendications précédentes, caractérisé en ce que ladite seconde partie (13) est sollicitée par un ressort (14) en appui par son extrémité opposée aux contacts sur ladite bride fixe (10A). 6) Circuit breaker according to one of the preceding claims, characterized in that said second part (13) is biased by a spring (14) bearing by its end opposite the contacts on said fixed flange (10A). 7) Disjoncteur selon la revendication 6, caractérisé en ce que ladite première partie (12) est sollicitée par un ressort (15) en appui par son extrémité opposée aux contacts sur ladite bride fixe (10A). 7) A circuit breaker according to claim 6, characterized in that said first part (12) is biased by a spring (15) bearing by its end opposite the contacts on said fixed flange (10A).
EP95401992A 1994-09-06 1995-09-01 Gas blast circuitbreaker with semi mobile piston Expired - Lifetime EP0701264B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9410659A FR2724259B1 (en) 1994-09-06 1994-09-06 SEMI-MOBILE PISTON SELF-BLOWING CIRCUIT BREAKER
FR9410659 1994-09-06

Publications (2)

Publication Number Publication Date
EP0701264A1 true EP0701264A1 (en) 1996-03-13
EP0701264B1 EP0701264B1 (en) 1999-10-20

Family

ID=9466725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401992A Expired - Lifetime EP0701264B1 (en) 1994-09-06 1995-09-01 Gas blast circuitbreaker with semi mobile piston

Country Status (5)

Country Link
EP (1) EP0701264B1 (en)
AT (1) ATE185924T1 (en)
DE (1) DE69512858T2 (en)
ES (1) ES2138168T3 (en)
FR (1) FR2724259B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756413A1 (en) * 1996-11-28 1998-05-29 Gec Alsthom T & D Sa SEMI-MOBILE PISTON CIRCUIT BREAKER
CN111630622A (en) * 2017-12-22 2020-09-04 Abb电网瑞士股份公司 Gas-insulated high-or medium-voltage circuit breaker
US11373824B2 (en) 2017-12-22 2022-06-28 Hitachi Energy Switzerland Ag Gas-insulated high or medium voltage circuit breaker

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829641A (en) * 1970-03-19 1974-08-13 Siemens Ag Puffer-type electric switch
EP0591039A1 (en) * 1992-09-29 1994-04-06 Gec Alsthom T Et D Sa H.T. self-blast circuit breaker having an arc chamber with reduced gas compression

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3829641A (en) * 1970-03-19 1974-08-13 Siemens Ag Puffer-type electric switch
EP0591039A1 (en) * 1992-09-29 1994-04-06 Gec Alsthom T Et D Sa H.T. self-blast circuit breaker having an arc chamber with reduced gas compression

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756413A1 (en) * 1996-11-28 1998-05-29 Gec Alsthom T & D Sa SEMI-MOBILE PISTON CIRCUIT BREAKER
EP0845796A1 (en) * 1996-11-28 1998-06-03 Gec Alsthom T & D Sa Circuit breaker with semi mobile piston
US5859399A (en) * 1996-11-28 1999-01-12 Gec Alsthom T & D Sa Circuit breaker having semi-moving piston
CN111630622A (en) * 2017-12-22 2020-09-04 Abb电网瑞士股份公司 Gas-insulated high-or medium-voltage circuit breaker
CN111630622B (en) * 2017-12-22 2022-06-14 日立能源瑞士股份公司 Gas-insulated high-or medium-voltage circuit breaker
US11373824B2 (en) 2017-12-22 2022-06-28 Hitachi Energy Switzerland Ag Gas-insulated high or medium voltage circuit breaker

Also Published As

Publication number Publication date
DE69512858T2 (en) 2000-05-04
ATE185924T1 (en) 1999-11-15
ES2138168T3 (en) 2000-01-01
EP0701264B1 (en) 1999-10-20
FR2724259B1 (en) 1996-11-22
DE69512858D1 (en) 1999-11-25
FR2724259A1 (en) 1996-03-08

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