EP0667633B1 - Autopneumatic circuit breaker with pneumatically locked semi-mobile piston - Google Patents

Autopneumatic circuit breaker with pneumatically locked semi-mobile piston Download PDF

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Publication number
EP0667633B1
EP0667633B1 EP95400111A EP95400111A EP0667633B1 EP 0667633 B1 EP0667633 B1 EP 0667633B1 EP 95400111 A EP95400111 A EP 95400111A EP 95400111 A EP95400111 A EP 95400111A EP 0667633 B1 EP0667633 B1 EP 0667633B1
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EP
European Patent Office
Prior art keywords
piston
tube
contact assembly
wall
moving contact
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Expired - Lifetime
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EP95400111A
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German (de)
French (fr)
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EP0667633A1 (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 EP0667633A1 publication Critical patent/EP0667633A1/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 self-blowing circuit breaker with semi-mobile piston pneumatically locked.
  • circuit breaker self-blowing type comprising an envelope filled with a pressurized dielectric gas, two arcing contacts cooperating with each other, at least one of which is part of a movable contact assembly integral with a maneuver and adapted to be moved axially in the envelope between a closed position and a position opening, the mobile contact assembly being constituted by a first tube and a second coaxial tube to the first tube to delimit, on either side of a first crown connecting the first and second tubes, a chamber supply air and a compression chamber communicating with the blowing chamber and closed by a semi-mobile piston.
  • the gas in the compression chamber is compressed because the distance between the piston and the crown separating the chamber compression of the blowing chamber decreases.
  • the dielectric gas is compressed for all movement of the movable contact assembly between the closed position and open position.
  • the moving the moving contact assembly requires certain amount of energy. The amount of energy necessary is all the greater as the gas in the compression chamber is compressed throughout the stroke of the mobile contact assembly.
  • the object of the invention is to reduce consumption of the circuit breaker during an opening operation.
  • first means for immobilizing the piston during a first part of the displacement of the contact assembly movable between closed position and position opening and second means for moving axially the piston with the movable contact assembly for one second part of this same displacement of the whole of movable contact, these means comprising pneumatic means cooperating with mechanical means.
  • pneumatic means are provided in order to cooperate with mechanical means which can thus be lighten and reduced effort. This is important since the efforts of these mechanical means are transmitted in the kinematics of the device and are generally collected by the operating member, generally a connecting rod, and by levers cooperating with the latter.
  • the second mechanical means for axially moving the piston include a drive member integral with the assembly of mobile contact which causes a stop element linked to the piston during the second part of the displacement of the movable contact assembly, this stop element being arranged on the path of the drive member.
  • the first mechanical means to immobilize the piston include a spring disposed between a fixed element and an end wall of the piston and a retaining member fixed cooperating with a stop wall of the piston.
  • the pneumatic means is a means of setting depression of the space between the retaining member fixed and the abutment wall, this space being sealed.
  • the pneumatic means consists of a annular element provided with at least one orifice and arranged between the end wall and the stop wall itself provided with at least one orifice, this annular element being stressed by at least one compression spring arranged between this annular element and the end wall, against the abutment wall of which it seals the orifice.
  • the stop element connected to the piston is said element annular, the compression spring of the pneumatic means being compressed during the training of this element by the drive body.
  • the pneumatic means which operates in vacuum during the first part of the movement of the whole movable between closed position and position opening, cooperates in keeping the piston stationary and thus allows the use of a very weak spring. So the force transmitted by this spring is also lower and there is no need to strengthen and weigh down the mobile assembly with its operating member.
  • the reference 1 designates an envelope preferably insulating, for example porcelain, filled 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 mobile contact assembly.
  • the fixed assembly includes an arcing contact 3, consisting of a metal tube whose end 3A is made in a material resistant to the effects of the arc, for example a tungsten based alloy.
  • Fixed set includes also a fixed permanent contact 4 consisting of fingers protected by a corona hood 5. Arc contact and the fixed permanent contact are electrically connected to a first socket, not shown.
  • the movable contact assembly includes a operation 6 passing through the chamber in a sealed manner and connected to a mechanism not shown.
  • Room 6 is connected a metal assembly comprising two tubes 7 and 8 coaxial, the tube 8 having a larger diameter than the tube 7.
  • the two tubes 7, 8 are interconnected by a metal crown 9. These tubes and this crown are of preferably made in one piece from machining.
  • the tube 7 constitutes the movable arcing contact. His end 7A is made of a material resistant to effects of the arc and cooperates with contact 3, 3A.
  • Tube 8 has an end 8A carrying a blowing nozzle 10 in insulating material.
  • the tubular portion 8A constitutes the permanent mobile contact of the circuit breaker and cooperates when the circuit breaker is in the on position (position closing) with fingers 4 as shown in Figure 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 delimit a compression chamber 18 separate from the blowing chamber 17 by the crown 9.
  • the piston slides axially between the tubes 7 and 8 in a sealed manner.
  • the piston 11 is connected to a tube 12 coaxial with the tubes 7 and 8.
  • the end of the tube 12 is connected to a crown 20 forming a stop wall.
  • the abutment wall 20 cooperates with a crown 14A connected to a fixed tube 14 coaxial with tube 12, the crown 14A forming an end stop member of travel of the tube 12 during a closing maneuver.
  • the tube 14 is electrically connected to a second outlet current not represented by an element fixed 21 also annular.
  • the tube 14 supports by elsewhere a permanent contact formed by fingers 16 in contact electric with tube 8.
  • One or more integral drive members 7B of the tube 7 and extending radially with respect thereto towards the tube 8 are engaged between the tube 7 and the tube 12.
  • One or more springs 15 are arranged between the fixed part 21 and an end wall 22 of the piston 11.
  • the piston 11 is equipped with a one-way valve 11A allowing gas circulation from inside the chamber delimited by envelope 1 towards the chamber compression 18.
  • the crown 9 is equipped with a unidirectional valve 9A allowing gas circulation from the compression chamber 18 to the blowing chamber 17.
  • the first mechanical means to immobilize the piston 11 during a first part of the displacement of the movable contact assembly between the closed position and the open position therefore include the spring 15 disposed between the fixed element 21 and the end wall 22 of the piston 11 and the fixed retaining member 14A cooperating with the abutment wall 20 of the piston 11.
  • the second mechanical means to move axially the piston 11 with the movable contact assembly during a second part of this same displacement of the whole of mobile contact include the drive member 7B integral with the mobile contact assembly which causes a stop element 23 linked to the piston 11 during the second part of the displacement of the movable contact assembly, this abutment element being arranged in the path of the member.
  • This stop element 23 connected to the piston 11 is an element annular which will be specified later.
  • a pneumatic means cooperates with these means mechanical.
  • This pneumatic means consists of the element annular 23 provided with at least one orifice 24 and disposed between the end wall 22 of the piston 11 and the wall of stop 20 of piston 11 itself provided with at least one orifice.
  • This annular element 23 is stressed by at least a compression spring 26 disposed between this element annular 23 and the end wall 22, against the wall of stop 20 which it tightly closes orifice 25 thanks to preferably a rubber washer 27 inserted in the annular element 23.
  • the compression spring 26 of the pneumatic means is compressed when driving the annular element 23 by the drive member 7B.
  • sliding seals 31, 32 are provided for sealing the vacuum chamber 28 visible on the figure 3.
  • the circuit breaker works as follows.
  • the circuit breaker is in the closing.
  • the spring pushes the semi-mobile piston 11 by its end wall 22, its abutment wall 20 being plated against the annular fixed stop member 14A.
  • the bedroom compression 18 is then of maximum volume.
  • the spring of compression 26 pushes the annular element 23 against the wall stop 20 closing its orifice 25.
  • the space filled with gas between this annular element 23 and the fixed stop member 14A being very weak, the pneumatic means then acts by depression as a means of holding the piston 11 against the stop member 14A whose action is added to that of the spring 15 which can thus be chosen of reduced size.
  • the operating member 6 is moved to the right of the Figure 1, moving the first tube 7 and the second tube 8.
  • the volume of the compression chamber 18 is reduced, the piston remains stationary, and the arc is blown by passing the gas contained in this chamber 18 through the valve 9A.
  • the drive member 7B moves freely along the tube 12. This first part of displacement takes place up to the position shown in figure 2.
  • the volume of the compression chamber 18 is substantially zero and the member 7B drive abuts against the annular element 23.
  • the dimensioning of the compression 18, tube 12 and tube 14 as well as the positioning of the drive member 7B are chosen so that this volume of the compression chamber is substantially zero at this time. Possibly, it can be made by choosing other dimensions a volume of non-zero "dead" compression chamber.

Landscapes

  • Circuit Breakers (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Massaging Devices (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The circuit breaker is housed in a porcelain container (1) and filled with dielectric gas. The static arc contact (3A) contacts an arc contact (7A) on a moving tube. An arc suppression protrusion (10) is fixed to the top of the tube and forms a first extinction chamber (17) with the contact plate (9). A one-way valve (9A) in the contact plate wall leads to a second extinction chamber (18). A piston (12) slides in the chamber, forming the back wall (11) of the chamber and has a valve (11A). There is a restraining spring (15) at the back of the piston. During the first opening period, the piston remains fixed in position by the spring, removing gas from the second extinction chamber. Once the piston reaches the first end wall, it moves back with the contact breaker, forming a two stage mechanism.

Description

La présente invention concerne un disjoncteur à auto-soufflage à piston semi-mobile verrouillé pneumatiquement.The present invention relates to a self-blowing circuit breaker with semi-mobile piston pneumatically locked.

On connaít du document EP-0475270 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 un piston semi-mobile.We know from document EP-0475270 a circuit breaker self-blowing type, comprising an envelope filled with a pressurized dielectric gas, two arcing contacts cooperating with each other, at least one of which is part of a movable contact assembly integral with a maneuver and adapted to be moved axially in the envelope between a closed position and a position opening, the mobile contact assembly being constituted by a first tube and a second coaxial tube to the first tube to delimit, on either side of a first crown connecting the first and second tubes, a chamber supply air and a compression chamber communicating with the blowing chamber and closed by a semi-mobile piston.

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 décroít. Dans ce disjoncteur connu, le gaz diélectrique est comprimé pendant tout le déplacement de l'ensemble de contact mobile entre la position de fermeture et la position d'ouverture. Le déplacement de l'ensemble de contact mobile requiert une certaine quantité d'énergie. La quantité d'énergie nécessaire est d'autant plus grande que le gaz dans la chambre de compression est comprimé pendant toute la course de l'ensemble de contact mobile.During an opening operation, the gas in the compression chamber is compressed because the distance between the piston and the crown separating the chamber compression of the blowing chamber decreases. In this known circuit breaker, the dielectric gas is compressed for all movement of the movable contact assembly between the closed position and open position. The moving the moving contact assembly requires certain amount of energy. The amount of energy necessary is all the greater as the gas in the compression chamber is compressed throughout the stroke of the mobile contact assembly.

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 consumption of the circuit breaker during an opening operation.

Pour ce faire, conformément à l'invention, sont prévus des premiers moyens pour immobiliser le piston pendant une première partie du déplacement de l'ensemble de contact mobile entre la position de fermeture et la position d'ouverture et des seconds moyens pour déplacer axialement le piston avec l'ensemble de contact mobile pendant une seconde partie de ce même déplacement de l'ensemble de contact mobile , ces moyens comportant un moyen pneumatique coopérant avec des moyens mécaniques.To do this, in accordance with the invention, there are provided first means for immobilizing the piston during a first part of the displacement of the contact assembly movable between closed position and position opening and second means for moving axially the piston with the movable contact assembly for one second part of this same displacement of the whole of movable contact, these means comprising pneumatic means cooperating with mechanical means.

Dans le cas de faibles courants à couper, l'extinction de l'arc se produisant entre les contacts d'arc pendant une opération d'ouverture, se fait à l'aide d'une compression du gaz dans la chambre de compression. Or l'extinction de l'arc obtenue par un flux de gaz provenant de la chambre de compression s'opère avant la fin du déplacement de l'ensemble de contact mobile. Par conséquent, il n'est pas nécessaire de comprimer le gaz dans la chambre de compression 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, 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.In the case of low currents to be cut, the extinction of arcing occurring between arcing contacts during a opening operation, is done using compression of the gas in the compression chamber. Or the extinction of the arc obtained by a gas flow coming from the chamber compression takes place before the displacement of the mobile contact assembly. Therefore, it is not necessary to compress the gas in the compression during the entire displacement of the entire mobile contact. From the moment the piston is moves with the moving contact assembly, the quantity of energy required to operate the contact assembly mobile is very small due to the fact that there are no more gas compression.

Par ailleurs, un moyen pneumatique est prévu afin de coopérer avec les moyens mécaniques qui peuvent ainsi être alléger et d'effort réduit. Ceci est important puisque les efforts de ces moyens mécaniques se transmettent dans la cinématique de l'appareil et sont en général encaissés par l'organe de manoeuvre, en général une bielle, et par des leviers coopérant avec cette dernière.Furthermore, pneumatic means are provided in order to cooperate with mechanical means which can thus be lighten and reduced effort. This is important since the efforts of these mechanical means are transmitted in the kinematics of the device and are generally collected by the operating member, generally a connecting rod, and by levers cooperating with the latter.

Selon un mode de réalisation préféré, les seconds moyens mécaniques pour déplacer axialement le piston comprennent un organe d'entraínement solidaire de l'ensemble de contact mobile qui entraíne un élément de butée lié au piston pendant la seconde partie du déplacement de l'ensemble de contact mobile, cet élément de butée étant disposé sur le trajet de l'organe d'entraínement.According to a preferred embodiment, the second mechanical means for axially moving the piston include a drive member integral with the assembly of mobile contact which causes a stop element linked to the piston during the second part of the displacement of the movable contact assembly, this stop element being arranged on the path of the drive member.

Les premiers moyens mécaniques pour immobiliser le piston comprennent un ressort disposé entre un élément fixe et une paroi d'extrémité du piston et un organe de retenue fixe coopérant avec une paroi de butée du piston. The first mechanical means to immobilize the piston include a spring disposed between a fixed element and an end wall of the piston and a retaining member fixed cooperating with a stop wall of the piston.

Le moyen pneumatique est un moyen de mise en dépression de l'espace compris entre l'organe de retenue fixe et la paroi de butée, cet espace étant rendu étanche.The pneumatic means is a means of setting depression of the space between the retaining member fixed and the abutment wall, this space being sealed.

De préférence, le moyen pneumatique est constitué d'un élément annulaire pourvu d'au moins un orifice et disposé entre la paroi d'extrémité et la paroi de butée elle-même pourvue d'au moins un orifice, cet élément annulaire étant sollicité par au moins un ressort de compression disposé entre cet élément annulaire et la paroi d'extrémité, contre la paroi de butée dont il ferme de façon étanche l'orifice.Preferably, the pneumatic means consists of a annular element provided with at least one orifice and arranged between the end wall and the stop wall itself provided with at least one orifice, this annular element being stressed by at least one compression spring arranged between this annular element and the end wall, against the abutment wall of which it seals the orifice.

L'élément de butée relié au piston est ledit élément annulaire, le ressort de compression du moyen pneumatique étant comprimé lors de l'entraínement de cet élément par l'organe d'entraínement.The stop element connected to the piston is said element annular, the compression spring of the pneumatic means being compressed during the training of this element by the drive body.

Le moyen pneumatique qui fonctionne en dépression durant la première partie du déplacement de l'ensemble mobile entre la position de fermeture et la position d'ouverture, coopère au maintien immobile du piston et permet ainsi d'utiliser un ressort très faible. Ainsi l'effort transmis par ce ressort est également plus faible et il n'est pas nécessaire de renforcer et d'alourdir l'ensemble mobile avec son organe de manoeuvre.The pneumatic means which operates in vacuum during the first part of the movement of the whole movable between closed position and position opening, cooperates in keeping the piston stationary and thus allows the use of a very weak spring. So the force transmitted by this spring is also lower and there is no need to strengthen and weigh down the mobile assembly with its operating member.

L'invention est exposée ci-après plus en détail à l'aide de dessins ne représentant qu'un mode de réalisation préféré de l'invention.The invention is set out below in more detail at using drawings representing only one embodiment preferred of the invention.

Les figures sont des vues en coupe longitudinale d'une disjoncteur conforme à l'invention et plus précisément

  • la figure 1 est une vue en position de fermeture,
  • la figure 2 est une vue en position de fin de compression et
  • la figure 3 est une vue en position d'ouverture.
    • The figures are views in longitudinal section of a circuit breaker according to the invention and more specifically
  • FIG. 1 is a view in the closed position,
  • FIG. 2 is a view in the end of compression position and
  • Figure 3 is a view 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, we will describe a breaking chamber, it being understood that a high voltage circuit breaker can have, for each phase, several breaking chambers of the type to be described. In Figures 1 to 3, the same references denote 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 an envelope preferably insulating, for example porcelain, filled 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 mobile 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 protégés par un capot pare-effluves 5. Le contact d'arc et le contact permanent fixe sont reliés électriquement à une première prise de courant, non représentée.The fixed assembly includes an arcing contact 3, consisting of a metal tube whose end 3A is made in a material resistant to the effects of the arc, for example a tungsten based alloy. Fixed set includes also a fixed permanent contact 4 consisting of fingers protected by a corona hood 5. Arc 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 includes a operation 6 passing through the chamber in a sealed manner and connected to a mechanism not shown. Room 6 is connected a metal assembly comprising two tubes 7 and 8 coaxial, the tube 8 having a larger diameter than the tube 7. The two tubes 7, 8 are interconnected by a metal crown 9. These tubes and this crown are of 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. His end 7A is made of a material resistant to effects of the arc and cooperates with contact 3, 3A. Tube 8 has an end 8A carrying a blowing nozzle 10 in insulating material. The tubular portion 8A constitutes the permanent mobile contact of the circuit breaker and cooperates when the circuit breaker is in the on position (position closing) with fingers 4 as shown in Figure 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. Le piston 11 est relié à un tube 12 coaxial aux tubes 7 et 8. L'extrémité du tube 12 est reliée à une couronne 20 formant une paroi de butée. La paroi de butée 20 coopère avec une couronne 14A reliée à un tube 14 fixe coaxial au tube 12, la couronne 14A formant un organe de butée de fin de course du tube 12 pendant une manoeuvre de fermeture. Le tube 14 est relié électriquement à une seconde prise de courant non représentée par l'intermédiaire d'un élément fixe 21 également annulaire. Le tube 14 supporte par ailleurs un contact permanent formé de doigts 16 en contact électrique avec le tube 8.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 delimit a compression chamber 18 separate from the blowing chamber 17 by the crown 9. The piston slides axially between the tubes 7 and 8 in a sealed manner. The piston 11 is connected to a tube 12 coaxial with the tubes 7 and 8. The end of the tube 12 is connected to a crown 20 forming a stop wall. The abutment wall 20 cooperates with a crown 14A connected to a fixed tube 14 coaxial with tube 12, the crown 14A forming an end stop member of travel of the tube 12 during a closing maneuver. The tube 14 is electrically connected to a second outlet current not represented by an element fixed 21 also annular. The tube 14 supports by elsewhere a permanent contact formed by fingers 16 in contact electric with tube 8.

    Un ou plusieurs organes d'entraínement 7B solidaires du tube 7 et s'étendant radialement par rapport à celui-ci en direction du tube 8 sont engagés entre le tube 7 et le tube 12.One or more integral drive members 7B of the tube 7 and extending radially with respect thereto towards the tube 8 are engaged between the tube 7 and the tube 12.

    Un ou plusieurs ressorts 15 sont disposés entre la partie fixe 21 et une paroi d'extrémité 22 du piston 11.One or more springs 15 are arranged between the fixed part 21 and an end wall 22 of the piston 11.

    Le piston 11 est équipé d'un clapet unidirectionnel 11A permettant une circulation de gaz de l'intérieur de la chambre délimité par l'enveloppe 1 vers la chambre de compression 18. La couronne 9 quant à elle est équipée d'un clapet unidirectionnel 9A permettant une circulation de gaz de la chambre de compression 18 vers la chambre de soufflage 17.The piston 11 is equipped with a one-way valve 11A allowing gas circulation from inside the chamber delimited by envelope 1 towards the chamber compression 18. The crown 9 is equipped with a unidirectional valve 9A allowing gas circulation from the compression chamber 18 to the blowing chamber 17.

    Les premiers moyens mécaniques pour immobiliser le piston 11 pendant une première partie du déplacement de l'ensemble de contact mobile entre la position de fermeture et la position d'ouverture comprennent donc le ressort 15 disposé entre l'élément fixe 21 et la paroi d'extrémité 22 du piston 11 et l'organe de retenue fixe 14A coopérant avec la paroi de butée 20 du piston 11.The first mechanical means to immobilize the piston 11 during a first part of the displacement of the movable contact assembly between the closed position and the open position therefore include the spring 15 disposed between the fixed element 21 and the end wall 22 of the piston 11 and the fixed retaining member 14A cooperating with the abutment wall 20 of the piston 11.

    Les seconds moyens mécaniques pour déplacer axialement le piston 11 avec l'ensemble de contact mobile pendant une seconde partie de ce même déplacement de l'ensemble de contact mobile comprennent l'organe d'entraínement 7B solidaire de l'ensemble de contact mobile qui entraíne un élément de butée 23 lié au piston 11 pendant la seconde partie du déplacement de l'ensemble de contact mobile, cet élément de butée étant disposé sur le trajet de l'organe. Cet élément de butée 23 relié au piston 11 est un élément annulaire qui sera précisé plus loin.The second mechanical means to move axially the piston 11 with the movable contact assembly during a second part of this same displacement of the whole of mobile contact include the drive member 7B integral with the mobile contact assembly which causes a stop element 23 linked to the piston 11 during the second part of the displacement of the movable contact assembly, this abutment element being arranged in the path of the member. This stop element 23 connected to the piston 11 is an element annular which will be specified later.

    Un moyen pneumatique coopère avec ces moyens mécaniques. Ce moyen pneumatique est constitué de l'élément annulaire 23 pourvu d'au moins un orifice 24 et disposé entre la paroi d'extrémité 22 du piston 11 et la paroi de butée 20 du piston 11 elle-même pourvue d'au moins un orifice. Cet élément annulaire 23 est sollicité par au moins un ressort de compression 26 disposé entre cet élément annulaire 23 et la paroi d'extrémité 22, contre la paroi de butée 20 dont il ferme de façon étanche l'orifice 25 grâce à une rondelle de préférence en caoutchouc 27 insérée dans l'élément annulaire 23. Le ressort de compression 26 du moyen pneumatique est comprimé lors de l'entraínement de l'élément annulaire 23 par l'organe d'entraínement 7B. Des joints d'étanchéité coulissants 31, 32 sont prévus pour rendre étanche la chambre de dépression 28 visible sur la figure 3.A pneumatic means cooperates with these means mechanical. This pneumatic means consists of the element annular 23 provided with at least one orifice 24 and disposed between the end wall 22 of the piston 11 and the wall of stop 20 of piston 11 itself provided with at least one orifice. This annular element 23 is stressed by at least a compression spring 26 disposed between this element annular 23 and the end wall 22, against the wall of stop 20 which it tightly closes orifice 25 thanks to preferably a rubber washer 27 inserted in the annular element 23. The compression spring 26 of the pneumatic means is compressed when driving the annular element 23 by the drive member 7B. Of sliding seals 31, 32 are provided for sealing the vacuum chamber 28 visible on the figure 3.

    Le fonctionnement du disjoncteur est le suivant.The circuit breaker works as follows.

    Sur la figure 1, le disjoncteur est en position de fermeture. Le ressort pousse le piston 11 semi-mobile par sa paroi d'extrémité 22, sa paroi de butée 20 étant plaquée contre l'organe annulaire de butée fixe 14A. La chambre de compression 18 est alors de volume maximal. Le ressort de compression 26 pousse l'élément annulaire 23 contre la paroi de butée 20 fermant son orifice 25. L'espace rempli de gaz entre cet élément annulaire 23 et l'organe de butée fixe 14A étant très faible, le moyen pneumatique agit alors par dépression comme un moyen de maintien du piston 11 contre l'organe de butée 14A dont l'action s'ajoute à celle du ressort 15 qui peut ainsi être choisi de dimension réduite.In Figure 1, the circuit breaker is in the closing. The spring pushes the semi-mobile piston 11 by its end wall 22, its abutment wall 20 being plated against the annular fixed stop member 14A. The bedroom compression 18 is then of maximum volume. The spring of compression 26 pushes the annular element 23 against the wall stop 20 closing its orifice 25. The space filled with gas between this annular element 23 and the fixed stop member 14A being very weak, the pneumatic means then acts by depression as a means of holding the piston 11 against the stop member 14A whose action is added to that of the spring 15 which can thus be chosen of reduced size.

    Durant la première partie de déplacement d'ouverture, l'organe de manoeuvre 6 est déplacé vers la droite de la figure 1, déplaçant le premier tube 7 et le second tube 8. Le volume de la chambre de compression 18 est diminué, le piston restant immobile, et le soufflage de l'arc s'effectue par passage du gaz contenu dans cette chambre 18 par le clapet 9A. L'organe d'entraínement 7B se déplace librement le long du tube 12. Cette première partie de déplacement s'effectue jusqu'à la position représentée sur la figure 2.During the first part of the opening movement, the operating member 6 is moved to the right of the Figure 1, moving the first tube 7 and the second tube 8. The volume of the compression chamber 18 is reduced, the piston remains stationary, and the arc is blown by passing the gas contained in this chamber 18 through the valve 9A. The drive member 7B moves freely along the tube 12. This first part of displacement takes place up to the position shown in figure 2.

    Dans cette position de la figure 2, le volume de la chambre de compression 18 est sensiblement nul et l'organe d'entraínement 7B vient buter contre l'élément annulaire 23. Avantageusement, le dimensionnement de la chambre de compression 18, du tube 12 et du tube 14 ainsi que le positionnement de l'organe d'entraínement 7B sont choisis afin que ce volume de la chambre de compression soit sensiblement nul à ce moment. Eventuellement, il peut être réalisé en choisissant d'autres dimensions un volume de chambre de compression "mort" non nul.In this position of FIG. 2, the volume of the compression chamber 18 is substantially zero and the member 7B drive abuts against the annular element 23. Advantageously, the dimensioning of the compression 18, tube 12 and tube 14 as well as the positioning of the drive member 7B are chosen so that this volume of the compression chamber is substantially zero at this time. Possibly, it can be made by choosing other dimensions a volume of non-zero "dead" compression chamber.

    Lorsqu'il vient en butée contre l'élément annulaire 23, l'organe d'entraínement 7B le pousse à l'encontre de l'effort du ressort de compression 26 et ainsi libère les orifices 24 et 25. Le gaz peut donc pénétrer dans la chambre d'aspiration 28 supprimant l'effort de retenue du à la dépression. La seconde partie du déplacement de l'ensemble de contact mobile commence et le piston 11 est déplacé avec l'ensemble mobile. Durant cette seconde partie du déplacement de l'ensemble de contact mobile, la compression du gaz dans la chambre de compression 18 est interrompue et l'énergie nécessaire à l'actionnement du tube de manoeuvre 6 est donc réduite. L'on atteint ainsi la position d'ouverture représentée sur la figure 3.When it abuts against the annular element 23, the drive member 7B pushes it against the force of the compression spring 26 and thus frees the orifices 24 and 25. The gas can therefore enter the chamber 28 removing the retaining force due to the depression. The second part of the displacement of the whole moving contact begins and piston 11 is moved with the mobile assembly. During this second part of displacement of the moving contact assembly, compression gas in the compression chamber 18 is interrupted and the energy required to actuate the operating tube 6 is therefore reduced. We thus reach the open position shown in Figure 3.

    Pour la refermeture du disjoncteur, les déplacements s'effectuent exactement dans le sens inverse, le gaz repassant de la chambre d'aspiration 28 dans l'espace 30 et remplissant la chambre de compression 18 en passant par le clapet 11A. De plus, l'organe d'entraínement 7B pousse sur une relativement petite distance la face frontale du piston 11 grâce à la partie de butée 11B assurant le placage de la paroi de butée 20 contre l'organe de retenue fixe 14A et la remise en action du moyen pneumatique à dépression.To close the circuit breaker, the displacements exactly in reverse, the gas ironing from the suction chamber 28 into the space 30 and filling the compression chamber 18 through the valve 11A. In addition, the drive member 7B pushes on a relatively small distance from the front face of the piston 11 thanks to the stop part 11B ensuring the plating of the abutment wall 20 against the fixed retaining member 14A and the resetting of the pneumatic vacuum means.

    Claims (6)

    1. A puffer-type circuit-breaker including a casing (1) filled with a dielectric gas under pressure, and two arcing contacts (3A, 7A) that co-operate with each other, at least one of which is part of a moving contact assembly that is secured to a drive member (6), and that is capable of being displaced axially inside the casing (1) between a closed position and an open position, the moving contact assembly being constituted by a first tube (7) and a second tube (8) that is coaxial with the first tube so as to define a blast chamber (17) on one side of a first annular wall (9) interconnecting the first tube and the second tube, and a compression chamber (18) on the other side of said annular wall, which compression chamber communicates with the blast chamber (17) and is closed by a semi-moving piston (11), said circuit-breaker being characterized by first means for holding the piston stationary during a first portion of the displacement of the moving contact assembly from the closed position to the open position, and by second means for axially displacing the piston with the moving contact assembly during a second portion of the same displacement of the moving contact assembly, which means include pneumatic means co-operating with mechanical means.
    2. A circuit-breaker according to claim 1, in which the second mechanical means for axially displacing the piston (11) comprise a drive member (7B) which is secured to the moving contact assembly and which drives an abutment element coupled to the piston (11) during the second portion of the displacement of the moving contact assembly, the abutment element being disposed in the path of the drive member (7B).
    3. A circuit-breaker according to claim 1 or 2, in which the first mechanical means for holding the piston (11) stationary comprise a spring (15) disposed between the fixed element (21) and an end wall (22) of the piston (11), and a fixed retaining member (14A) co-operating with an abutment wall (20) of the piston (11).
    4. A circuit-breaker according to claim 3, in which the pneumatic means are means for creating suction in the space between the fixed retaining member (14A) and the abutment wall (20), which space is sealed in gastight manner.
    5. A circuit-breaker according to claim 4, in which the pneumatic means are constituted by an annular element (23) which is provided with at least one orifice (24) and which is disposed between the end wall (22) of the piston (11) and the abutment wall (20) of the piston (11), which abutment wall is itself provided with at least one orifice (25), the annular element (23) being urged against the abutment wall (20) by at least one compression spring (26) disposed between the annular element (23) and the end wall (22), thereby closing the orifice (25) in the abutment wall in gastight manner.
    6. A circuit-breaker according to claims 2 and 5, in which the abutment element connected to the piston (11) is said annular element (23), the compression spring (26) of the pneumatic means being compressed when the annular element (23) is driven by the drive member (7B).
    EP95400111A 1994-01-25 1995-01-19 Autopneumatic circuit breaker with pneumatically locked semi-mobile piston Expired - Lifetime EP0667633B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9400762 1994-01-25
    FR9400762A FR2715499B1 (en) 1994-01-25 1994-01-25 Self-blowing circuit breaker with pneumatically locked piston.

    Publications (2)

    Publication Number Publication Date
    EP0667633A1 EP0667633A1 (en) 1995-08-16
    EP0667633B1 true EP0667633B1 (en) 1999-10-06

    Family

    ID=9459356

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP95400111A Expired - Lifetime EP0667633B1 (en) 1994-01-25 1995-01-19 Autopneumatic circuit breaker with pneumatically locked semi-mobile piston

    Country Status (11)

    Country Link
    US (1) US5567923A (en)
    EP (1) EP0667633B1 (en)
    CN (1) CN1071483C (en)
    AT (1) ATE185446T1 (en)
    AU (1) AU687947B2 (en)
    BR (1) BR9500295A (en)
    DE (1) DE69512541T2 (en)
    ES (1) ES2136810T3 (en)
    FR (1) FR2715499B1 (en)
    PL (1) PL175980B1 (en)
    ZA (1) ZA95550B (en)

    Families Citing this family (10)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2753564B1 (en) * 1996-09-17 1998-11-27 Gec Alsthom T & D Sa CIRCUIT BREAKER WITH SELF-BLOWING AND REDUCED COMPRESSION
    FR2753834B1 (en) * 1996-09-23 1998-12-04 HIGH VOLTAGE CIRCUIT BREAKER WITH SHOCK ABSORBER
    FR2761520B1 (en) * 1997-03-27 1999-05-14 Gec Alsthom T & D Sa LOW-ENERGY LOW-ENERGY MEDIUM VOLTAGE CIRCUIT BREAKER
    FR2767221B1 (en) * 1997-08-11 1999-09-10 Gec Alsthom T & D Sa SELF-BLOWING AND REDUCED COMPRESSION CIRCUIT BREAKER
    DE10353497A1 (en) † 2003-11-11 2005-06-09 Siemens Ag switching device
    CN100416724C (en) * 2006-06-05 2008-09-03 西安交通大学 Low-voltage arc quenching system based on wall erosion to improve pneumatic repellent force and break performance
    FR2997222B1 (en) 2012-10-19 2015-01-16 Alstom Technology Ltd DEVICE FOR ESTABLISHING AND / OR CUTTING CURRENT WITH PERMANENT CONTACTS WITH REDUCED WEAR
    EP3264435B1 (en) * 2016-06-27 2019-04-24 ABB Schweiz AG Medium voltage circuit switch or breaker
    CN113690093B (en) * 2021-08-25 2023-01-24 西安西电开关电气有限公司 Circuit breaker
    CN114628189B (en) * 2021-12-23 2024-05-24 国网浙江省电力有限公司 Compressed air type arc extinguishing chamber and breaker

    Family Cites Families (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE1765153A1 (en) * 1967-04-13 1971-07-01 Magrini Fab Riun Scarpa Self-extinguishing electrical gas pressure switch with switching chamber with a mouth opening
    US3987262A (en) * 1975-05-12 1976-10-19 Westinghouse Electric Corporation Puffer-type gas-blast circuit-interrupter having variable-area stationary composite piston structure
    CH590552A5 (en) * 1975-09-26 1977-08-15 Sprecher & Schuh Ag
    DE3322597A1 (en) * 1983-05-31 1984-12-06 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau EXHAUST GAS SWITCH
    FR2639147B1 (en) * 1988-09-16 1990-12-14 Alsthom Gec HIGH VOLTAGE CIRCUIT BREAKER WITH DIELECTRIC GAS USED FOR BLOWING
    DE3930548C2 (en) * 1989-09-13 1994-05-19 Licentia Gmbh Gas pressure switch
    SE466979B (en) * 1990-09-11 1992-05-04 Asea Brown Boveri SELF-Blow type high voltage switch

    Also Published As

    Publication number Publication date
    AU687947B2 (en) 1998-03-05
    PL175980B1 (en) 1999-03-31
    US5567923A (en) 1996-10-22
    CN1071483C (en) 2001-09-19
    EP0667633A1 (en) 1995-08-16
    ZA95550B (en) 1995-11-14
    FR2715499A1 (en) 1995-07-28
    CN1111031A (en) 1995-11-01
    FR2715499B1 (en) 1996-03-15
    PL306939A1 (en) 1995-08-07
    ATE185446T1 (en) 1999-10-15
    DE69512541T2 (en) 2000-05-04
    AU1133095A (en) 1995-08-03
    BR9500295A (en) 1995-10-17
    DE69512541D1 (en) 1999-11-11
    ES2136810T3 (en) 1999-12-01

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