EP0664552A1 - Puffer-type gas-blast circuit breaker with double movement - Google Patents

Puffer-type gas-blast circuit breaker with double movement Download PDF

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Publication number
EP0664552A1
EP0664552A1 EP95400112A EP95400112A EP0664552A1 EP 0664552 A1 EP0664552 A1 EP 0664552A1 EP 95400112 A EP95400112 A EP 95400112A EP 95400112 A EP95400112 A EP 95400112A EP 0664552 A1 EP0664552 A1 EP 0664552A1
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EP
European Patent Office
Prior art keywords
contact
circuit breaker
tube
piston
groove
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.)
Withdrawn
Application number
EP95400112A
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German (de)
French (fr)
Inventor
Michel Perret
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.)
Grid Solutions SAS
Original Assignee
GEC Alsthom T&D SA
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Filing date
Publication date
Application filed by GEC Alsthom T&D SA filed Critical GEC Alsthom T&D SA
Publication of EP0664552A1 publication Critical patent/EP0664552A1/en
Withdrawn legal-status Critical Current

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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
    • 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
    • H01H33/904—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 characterised by the transmission between operating mechanism and piston or movable contact

Definitions

  • the present invention relates to a self-blowing circuit breaker with double movement.
  • Document FR-2 683 383 discloses a circuit breaker comprising, in an envelope filled with dielectric gas, in particular SF6, a first arcing contact connected to a first socket, a second arcing contact having the same longitudinal axis as the first contact and connected to a second outlet and movable in a fixed cylinder and forming with a movable piston a compression chamber, the circuit breaker comprising means for driving the piston in a direction opposite to that of displacement of the second contact.
  • dielectric gas in particular SF6
  • a first arcing contact connected to a first socket
  • a second arcing contact having the same longitudinal axis as the first contact and connected to a second outlet and movable in a fixed cylinder and forming with a movable piston a compression chamber
  • the circuit breaker comprising means for driving the piston in a direction opposite to that of displacement of the second contact.
  • 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.
  • the dielectric gas is compressed during the entire movement of the movable contact assembly between the closed position and the open position. Moving the movable contact assembly requires a certain amount of energy. The amount of energy required is greater the greater the gas in the compression chamber is compressed during the entire stroke of the movable contact assembly.
  • the object of the invention is to reduce the energy consumption of the circuit breaker during an opening operation and also to have the highest possible pressure in the separation of the arcing contacts in the expansion volume connected to the compression chamber.
  • these drive means act during a first part of the movement of the movable contact between the closed position and the open position and the circuit breaker comprises means for immobilizing the piston relative to the contact mobile during a second part of this same movement of the mobile contact.
  • the drive means consist of at least two links, one end of which is articulated on a guide element and the other end of which is articulated for the first link on the piston and for the second link.
  • the guide element moving freely in a first groove perpendicular to the longitudinal axis of the second contact and arranged on a fixed part and the two links being arranged on either side of a passing vertical plane by the longitudinal axis of the first groove.
  • the immobilization means consist of said rods and said guide element moving in at least a second groove parallel to the longitudinal axis of the second contact connected to the first groove.
  • said fixed part is the fixed cylinder.
  • FIG. 5 is a sectional view along V-V of FIG. 4.
  • Figure 6 is a sectional view along VI-VI of Figure 1.
  • a cutout chamber with a horizontal longitudinal axis will be described, it being understood that a high-voltage circuit breaker, may, for each phase, have several cutoff chambers of the type which will be described and with a vertical longitudinal axis or horizontal.
  • the same references designate identical elements.
  • the reference 1 designates an insulating envelope, for example made of porcelain, or metallic in the case of a circuit breaker of the shielded type, filled with a gas with good dielectric properties, for example sulfur hexafluoride under pressure from a few bars.
  • a gas with good dielectric properties for example sulfur hexafluoride under pressure from a few bars.
  • the circuit breaker includes a fixed assembly and a movable contact assembly.
  • the fixed assembly comprises an arcing contact 2, consisting of a metal tube, the end 2A 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 5 consisting of fingers. The fixed arcing contact and the permanent contact are electrically connected to a first socket, not shown.
  • the movable contact assembly comprises an operating part passing through the interrupting chamber in a sealed manner and connected to a mechanism not shown.
  • a metal assembly comprising two coaxial tubes 4 and 13 is connected to this part or operating rod, the tube 13 having a diameter greater than the tube 4.
  • the two tubes 4, 13 are connected together by a metal crown 15. These tubes and this ring are preferably made in one piece from machining.
  • the tube 4 constitutes the movable arcing contact and is actuated axially by the operating rod in a known manner. Its end 4A is made of a material resistant to the effects of the arc and cooperates with the contact 2.
  • the tube 13 has an end 13A, of reduced diameter and carrying a blowing nozzle 14 made of insulating material.
  • the tubular portion 13A constitutes the permanent movable contact of the circuit breaker and cooperates, when the circuit breaker is in the closed position with the fingers 5 as shown in FIG. 1.
  • the crown 15, the tubes 4 and 13 and a piston 7 define a compression chamber 3 separated from the blowing chamber 16 by the crown 15.
  • the piston 7 slides axially between the tubes 4 and 13 in a sealed manner.
  • the piston 7 comprises a tube 17 coaxial with the tubes 4 and 13 and sliding on the tube 4 inside a fixed cylinder 6 coaxial with the previous ones.
  • the cylinder 6 is electrically connected to a second outlet not shown.
  • the cylinder 6 also supports a permanent contact formed by fingers 18 in electrical contact with the tube 13.
  • the piston 7 is equipped with a unidirectional valve 7A allowing gas to flow from the interior of the interrupting chamber to the compression chamber 3.
  • the crown 15 is equipped with a single orifice 15A.
  • the circuit breaker comprises means for driving the piston 7 in a direction opposite to that of the displacement of the second contact 4 acting during a first part of the displacement of the movable contact 4 between the closed position and the open position and means of immobilization of the piston 7 relative to the movable contact 4 during a second part of this same movement of the movable contact 4.
  • These drive means consist of at least two links 8, 9 one end of which is articulated on a guide element 10 and the other end of which is articulated for the first link 8 on the tube 17 of the piston 7 and for the second link 9 on the movable contact 4.
  • This guide element 10 moves freely in at least a first groove 11 perpendicular to the longitudinal axis of the movable contact 4, vertical in the case shown, arranged on a fixed part 6A forming part of the fixed cylinder 6 and the two links 8, 9 are arranged on both sides other of a vertical plane passing through the longitudinal axis of this first groove 11.
  • the immobilization means consist of said links 8, 9 and of said guide element 10 moving in at least one second groove 12 parallel to the longitudinal axis of the movable contact, horizontal in the case shown, connected to the first groove 11.
  • FIGS. 5 and 6 These means are shown in more detail in FIGS. 5 and 6.
  • the links 9, 9 ′ are at their other end pivoting on another axis 20 passing through the tube 4 constituting the movable contact.
  • the links 8, 8 ′ are at their other pivoting end on lugs 21, 21 ′ connected to the tube 17 of the piston 7.
  • FIG. 1 the circuit breaker is shown in the closed position.
  • the movable contact 2 is pushed by the operating rod in its extreme position to the left.
  • the rollers 10, 10 ' are in their highest highest position in the vertical groove 11 (in the case of a general horizontal positioning of the circuit breaker) and in this position the piston 7 is in its most remote from the crown 15, the volume of the compression chamber 3 being maximum.
  • This double movement is particularly advantageous in order to obtain a high blowing pressure and to avoid re-priming, in circuit breakers with low dielectric gas pressure, for example on networks operating under temperatures which may be very low.
  • the arc forms and causes a strong pressure rise in the blowing and expansion chamber 16 where the pressure is already high and the arc is thus easily blown.
  • the rollers 10, 10 'have then reached their lowest position at the entrance to the horizontal groove 12.
  • the dimensions are chosen so that at this moment the piston 7 abuts against the crown 15 and the volume of the compression chamber 3 is substantially zero.
  • it can be different and a non-zero "dead" volume of the compression chamber 3 can be provided.
  • the piston 7 and the contact 4 have, thanks to this arrangement, the same speed of movement and it is therefore unnecessary to provide a one-way valve in the orifice 15A of the crown 15.
  • the circuit breaker is closed again by the same movements in the opposite direction.

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  • Circuit Breakers (AREA)

Abstract

The switch mechanism is housed in a sealed porcelain container (1). Current input is applied to a static tube (2) with extinguishing arc section (2A). A moving tube (13) has a contact section (13A) and extinguishing section (4A), as well as an extinguisher protrusion (14). The rear of the first tube (4) houses a second tube (17) which slides in the first tube and creates a chamber area (3). As the first tube retracts, the second tube is pushed forwards, by means of a mechanical converter (8). The gas in the region of the contacts is then pressurised, by movement of the gas through a nozzle (15A). On making the circuit, a valve allows gas to re-enter the chamber.

Description

La présente invention se rapporte à un disjoncteur à auto-soufflage et à double mouvement.The present invention relates to a self-blowing circuit breaker with double movement.

On connaît du document FR-2 683 383 un disjoncteur comprenant dans une enveloppe remplie de gaz diélectrique en particulier de SF6, un premier contact d'arc relié à une première prise de courant, un second contact d'arc de même axe longitudinal que le premier contact et relié à une seconde prise de courant et mobile dans un cylindre fixe et formant avec un piston mobile une chambre de compression, le disjoncteur comportant des moyens d'entraînement du piston dans un sens opposé à celui du déplacement du second contact.Document FR-2 683 383 discloses a circuit breaker comprising, in an envelope filled with dielectric gas, in particular SF6, a first arcing contact connected to a first socket, a second arcing contact having the same longitudinal axis as the first contact and connected to a second outlet and movable in a fixed cylinder and forming with a movable piston a compression chamber, the circuit breaker comprising means for driving the piston in a direction opposite to that of displacement of the second contact.

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. 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 ring separating the compression chamber from the blowing chamber decreases. In this known circuit breaker, the dielectric gas is compressed during the entire movement of the movable contact assembly between the closed position and the open position. Moving the movable contact assembly requires a certain amount of energy. The amount of energy required is greater the greater the gas in the compression chamber is compressed during the entire stroke of the movable contact assembly.

Le but de l'invention est de réduire la consommation d'énergie du disjoncteur pendant une opération d'ouverture et également d'avoir à la séparation des contacts d'arcs la pression la plus élevée possible dans le volume d'expansion relié à la chambre de compression.The object of the invention is to reduce the energy consumption of the circuit breaker during an opening operation and also to have the highest possible pressure in the separation of the arcing contacts in the expansion volume connected to the compression chamber.

Pour ce faire, conformément à l'invention, ces moyens d'entraînement agissent pendant une première partie du déplacement du contact mobile entre la position de fermeture et la position d'ouverture et le disjoncteur comporte des moyens d'immobilisation du piston par rapport au contact mobile pendant une seconde partie de ce même déplacement du contact mobile.To do this, in accordance with the invention, these drive means act during a first part of the movement of the movable contact between the closed position and the open position and the circuit breaker comprises means for immobilizing the piston relative to the contact mobile during a second part of this same movement of the mobile contact.

Selon un mode de réalisation préféré, les moyens d'entraînement sont constitués d'au moins deux biellettes dont une extrémité est articulée sur un élément de guidage et dont l'autre extrémité est articulée pour la première biellette sur le piston et pour la seconde biellette sur le contact mobile, l'élément de guidage se déplaçant librement dans une première rainure perpendiculaire à l'axe longitudinal du second contact et agencée sur une partie fixe et les deux biellettes étant disposées de part et d'autre d'un plan vertical passant par l'axe longitudinal de la première rainure.According to a preferred embodiment, the drive means consist of at least two links, one end of which is articulated on a guide element and the other end of which is articulated for the first link on the piston and for the second link. on the movable contact, the guide element moving freely in a first groove perpendicular to the longitudinal axis of the second contact and arranged on a fixed part and the two links being arranged on either side of a passing vertical plane by the longitudinal axis of the first groove.

Les moyens d'immobilisation sont constitués desdites biellettes et dudit élément de guidage se déplaçant dans au moins une seconde rainure parallèle à l'axe longitudinal du second contact raccordée à la première rainure.The immobilization means consist of said rods and said guide element moving in at least a second groove parallel to the longitudinal axis of the second contact connected to the first groove.

Avantageusement, ladite partie fixe est le cylindre fixe.Advantageously, said fixed part is the fixed cylinder.

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

La figure 1 à 4 sont des vues en coupe longitudinale d'un disjoncteur conforme à l'invention où

  • sur la figure 1, le disjoncteur est en position de fermeture,
  • sur la figure 2, le disjoncteur est en position de séparation des contacts,
  • sur la figure 3, le disjoncteur est en position de fin de compression,
  • sur la figure 4, le disjoncteur est en position d'ouverture.
Figure 1 to 4 are views in longitudinal section of a circuit breaker according to the invention where
  • in FIG. 1, the circuit breaker is in the closed position,
  • in FIG. 2, the circuit breaker is in the contact separation position,
  • in FIG. 3, the circuit breaker is in the end of compression position,
  • in Figure 4, the circuit breaker is in the open position.

La figure 5 est une vue en coupe selon V-V de la figure 4.FIG. 5 is a sectional view along V-V of FIG. 4.

La figure 6 est une vue en coupe selon VI-VI de la figure 1.Figure 6 is a sectional view along VI-VI of Figure 1.

Dans ce qui suit, on décrira une chambre de coupure d'axe longitudinal horizontal, étant entendu qu'un disjoncteur à haute tension, peut comporter, pour chaque phase, plusieurs chambres de coupure du type qui va être décrit et d'axe longitudinal vertical ou horizontal. Sur les figures, les mêmes références désignent des éléments identiques.In what follows, a cutout chamber with a horizontal longitudinal axis will be described, it being understood that a high-voltage circuit breaker, may, for each phase, have several cutoff chambers of the type which will be described and with a vertical longitudinal axis or horizontal. In the figures, the same references designate identical elements.

Sur les figures, la référence 1 désigne une enveloppe isolante, par exemple en porcelaine, ou métallique dans le cas d'un disjoncteur du type blindé, remplie d'un gaz à bonnes propriétés diélectriques, par exemple l'hexafluorure de soufre sous une pression de quelques bars.In the figures, the reference 1 designates an insulating envelope, for example made of porcelain, or metallic in the case of a circuit breaker of the shielded type, filled with a gas with good dielectric properties, for example sulfur hexafluoride under pressure from 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 2, constitué d'un tube métallique dont l'extrémité 2A 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 5 constitué de doigts. Le contact d'arc et le contact permanent fixes sont reliés électriquement à une première prise de courant, non représentée.The fixed assembly comprises an arcing contact 2, consisting of a metal tube, the end 2A 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 5 consisting of fingers. The fixed arcing contact and the permanent contact are electrically connected to a first socket, not shown.

L'ensemble de contact mobile comprend une pièce de manoeuvre traversant la chambre de coupure de manière étanche et reliée à un mécanisme non représenté. A cette pièce ou tringle de manoeuvre est relié un ensemble métallique comprenant deux tubes 4 et 13 coaxiaux, le tube 13 ayant un diamètre plus grand que le tube 4. Les deux tubes 4, 13 sont reliés entre eux par une couronne métallique 15. Ces tubes et cette couronne sont de préférence réalisés en une seule pièce venue d'usinage.The movable contact assembly comprises an operating part passing through the interrupting chamber in a sealed manner and connected to a mechanism not shown. A metal assembly comprising two coaxial tubes 4 and 13 is connected to this part or operating rod, the tube 13 having a diameter greater than the tube 4. The two tubes 4, 13 are connected together by a metal crown 15. These tubes and this ring are preferably made in one piece from machining.

Le tube 4 constitue le contact d'arc mobile et est actionné axialement par la tringle de manoeuvre de façon connue. Son extrémité 4A est réalisée en un matériau résistant aux effets de l'arc et coopère avec le contact 2. Le tube 13 possède une extrémité 13A, de diamètre réduit et portant une buse de soufflage 14 en matériau isolant. La portion tubulaire 13A constitue le contact mobile permanent du disjoncteur et coopère, lorsque le disjoncteur est en position de fermeture avec les doigts 5 comme le montre la figure 1.The tube 4 constitutes the movable arcing contact and is actuated axially by the operating rod in a known manner. Its end 4A is made of a material resistant to the effects of the arc and cooperates with the contact 2. The tube 13 has an end 13A, of reduced diameter and carrying a blowing nozzle 14 made of insulating material. The tubular portion 13A constitutes the permanent movable contact of the circuit breaker and cooperates, when the circuit breaker is in the closed position with the fingers 5 as shown in FIG. 1.

L'extrémité 13A du tube 13, la buse de soufflage 14, le tube 4 et la couronne 15 délimitent une chambre de soufflage et d'expansion 16. La couronne 15, les tubes 4 et 13 et un piston 7 délimitent une chambre de compression 3 séparée de la chambre de soufflage 16 par la couronne 15. Le piston 7 coulisse axialement entre les tubes 4 et 13 de façon étanche. Le piston 7 comporte un tube 17 coaxial aux tubes 4 et 13 et coulissant sur le tube 4 à l'intérieur d'un cylindre 6 fixe coaxial aux précédents. Le cylindre 6 est relié électriquement à une seconde prise de courant non représentée. Le cylindre 6 supporte par ailleurs un contact permanent formé de doigts 18 en contact électrique avec le tube 13.The end 13A of the tube 13, the blowing nozzle 14, the tube 4 and the crown 15 delimit a blowing and expansion chamber 16. The crown 15, the tubes 4 and 13 and a piston 7 define a compression chamber 3 separated from the blowing chamber 16 by the crown 15. The piston 7 slides axially between the tubes 4 and 13 in a sealed manner. The piston 7 comprises a tube 17 coaxial with the tubes 4 and 13 and sliding on the tube 4 inside a fixed cylinder 6 coaxial with the previous ones. The cylinder 6 is electrically connected to a second outlet not shown. The cylinder 6 also supports a permanent contact formed by fingers 18 in electrical contact with the tube 13.

Le piston 7 est équipé d'un clapet unidirectionnel 7A permettant une circulation de gaz de l'intérieur de la chambre de coupure vers la chambre de compression 3. La couronne 15 est équipée d'un orifice simple 15A.The piston 7 is equipped with a unidirectional valve 7A allowing gas to flow from the interior of the interrupting chamber to the compression chamber 3. The crown 15 is equipped with a single orifice 15A.

Le disjoncteur comporte des moyens d'entraînement du piston 7 dans un sens opposé à celui du déplacement du second contact 4 agissant pendant une première partie du déplacement du contact mobile 4 entre la position de fermeture et la position d'ouverture et des moyens d'immobilisation du piston 7 par rapport au contact mobile 4 pendant une seconde partie de ce même déplacement du contact mobile 4.The circuit breaker comprises means for driving the piston 7 in a direction opposite to that of the displacement of the second contact 4 acting during a first part of the displacement of the movable contact 4 between the closed position and the open position and means of immobilization of the piston 7 relative to the movable contact 4 during a second part of this same movement of the movable contact 4.

Ces moyens d'entraînement sont constitués d'au moins deux biellettes 8, 9 dont une extrémité est articulée sur un élément de guidage 10 et dont l'autre extrémité est articulée pour la première biellette 8 sur le tube 17 du piston 7 et pour la seconde biellette 9 sur le contact mobile 4. Cet élément de guidage 10 se déplace librement dans au moins une première rainure 11 perpendiculaire à l'axe longitudinal du contact mobile 4, verticale dans le cas représenté, agencée sur une partie fixe 6A faisant partie du cylindre fixe 6 et les deux biellettes 8, 9 sont disposées de part et d'autre d'un plan vertical passant par l'axe longitudinal de cette première rainure 11.These drive means consist of at least two links 8, 9 one end of which is articulated on a guide element 10 and the other end of which is articulated for the first link 8 on the tube 17 of the piston 7 and for the second link 9 on the movable contact 4. This guide element 10 moves freely in at least a first groove 11 perpendicular to the longitudinal axis of the movable contact 4, vertical in the case shown, arranged on a fixed part 6A forming part of the fixed cylinder 6 and the two links 8, 9 are arranged on both sides other of a vertical plane passing through the longitudinal axis of this first groove 11.

Les moyens d'immobilisation sont constitués desdites biellettes 8, 9 et dudit élément de guidage 10 se déplaçant dans au moins une seconde rainure 12 parallèle à l'axe longitudinal du contact mobile, horizontale dans le cas représenté, raccordée à la première rainure 11.The immobilization means consist of said links 8, 9 and of said guide element 10 moving in at least one second groove 12 parallel to the longitudinal axis of the movable contact, horizontal in the case shown, connected to the first groove 11.

Ces moyens sont représentés plus en détail sur les figures 5 et 6.These means are shown in more detail in FIGS. 5 and 6.

Sur la partie fixe 6A constituant une partie du cylindre 6 sont conformées deux rainures en L 11-12 et 11'-12' sur des faces opposées et en vis-à-vis. Dans ces deux rainures vient en prise un axe 19 par l'intermédiaire de deux galets 10 et 10'. De part et d'autre d'un plan vertical passant par cet axe 19, ce dernier supporte d'une part deux biellettes 9, 9' et d'autre part deux autres biellettes 8, 8'.On the fixed part 6A constituting a part of the cylinder 6 are shaped two L-shaped grooves 11-12 and 11'-12 'on opposite faces and facing each other. In these two grooves engages an axis 19 by means of two rollers 10 and 10 '. On either side of a vertical plane passing through this axis 19, the latter supports on the one hand two links 9, 9 'and on the other hand two other links 8, 8'.

Comme visible sur la figure 5, les biellettes 9, 9' sont à leur autre extrémité pivotantes sur un autre axe 20 traversant le tube 4 constituant le contact mobile.As visible in FIG. 5, the links 9, 9 ′ are at their other end pivoting on another axis 20 passing through the tube 4 constituting the movable contact.

Comme visible sur la figure 6, les biellettes 8, 8' sont à leur autre extrémité pivotantes sur des tenons 21, 21' reliés au tube 17 du piston 7.As can be seen in FIG. 6, the links 8, 8 ′ are at their other pivoting end on lugs 21, 21 ′ connected to the tube 17 of the piston 7.

Le fonctionnement du disjoncteur va maintenant être décrit en référence aux figures 1 à 4.The operation of the circuit breaker will now be described with reference to FIGS. 1 to 4.

Sur la figure 1, le disjoncteur est représenté en position de fermeture. Le contact mobile 2 est poussé par la tringle de manoeuvre dans sa position extrême vers la gauche. Les galets 10, 10' sont dans leur position extrême la plus haute dans la rainure verticale 11 (dans le cas d'un positionnement général horizontale du disjoncteur) et dans cette position le piston 7 est dans sa position la plus éloignée de la couronne 15, le volume de la chambre de compression 3 étant maximal.In Figure 1, the circuit breaker is shown in the closed position. The movable contact 2 is pushed by the operating rod in its extreme position to the left. The rollers 10, 10 'are in their highest highest position in the vertical groove 11 (in the case of a general horizontal positioning of the circuit breaker) and in this position the piston 7 is in its most remote from the crown 15, the volume of the compression chamber 3 being maximum.

Lors de l'ouverture, comme représenté sur la figure 2, la tringle tire vers la droite le contact mobile 4 et les contacts 2A et 4A se séparent. Le contact 4 se déplaçant, l'axe 20 est également déplacé et les biellettes 9, 9' tirent les galets 10, 10' vers le bas, déplaçant également les biellettes 8, 8' qui poussent les tenons 21, 21' et donc le tube 17 du piston 7 vers la gauche. Le gaz dans la chambre de compression 3 est donc comprimé par le double déplacement du piston 7 et de la couronne 15 et ce gaz comprimé remplit la chambre de soufflage 16.When opening, as shown in Figure 2, the rod pulls the movable contact 4 to the right and the contacts 2A and 4A separate. The contact 4 moving, the axis 20 is also moved and the links 9, 9 'pull the rollers 10, 10' downwards, also moving the links 8, 8 'which push the pins 21, 21' and therefore the tube 17 of piston 7 to the left. The gas in the compression chamber 3 is therefore compressed by the double displacement of the piston 7 and of the crown 15 and this compressed gas fills the blowing chamber 16.

Ce double mouvement est particulièrement avantageux afin d'obtenir une forte pression de soufflage et éviter les réamorçages, dans des disjoncteurs à faible pression de gaz diélectrique, par exemple sur les réseaux fonctionnant sous des températures pouvant être très basses.This double movement is particularly advantageous in order to obtain a high blowing pressure and to avoid re-priming, in circuit breakers with low dielectric gas pressure, for example on networks operating under temperatures which may be very low.

Une fois les contacts séparés, comme représenté sur la figure 3, l'arc se forme et entraîne une forte montée en pression dans la chambre de soufflage et d'expansion 16 où la pression est déjà élevée et l'arc est ainsi aisément soufflé. Les galets 10, 10' ont alors atteint leur position la plus basse à l'entrée de la rainure horizontale 12. De préférence, les dimensions sont choisies pour qu'à ce moment le piston 7 vienne buter contre la couronne 15 et le volume de la chambre de compression 3 est sensiblement nul. Eventuellement, il peut en être différemment et il peut être prévu un volume "mort" non nul de la chambre de compression 3.Once the contacts are separated, as shown in FIG. 3, the arc forms and causes a strong pressure rise in the blowing and expansion chamber 16 where the pressure is already high and the arc is thus easily blown. The rollers 10, 10 'have then reached their lowest position at the entrance to the horizontal groove 12. Preferably, the dimensions are chosen so that at this moment the piston 7 abuts against the crown 15 and the volume of the compression chamber 3 is substantially zero. Optionally, it can be different and a non-zero "dead" volume of the compression chamber 3 can be provided.

Le déplacement du contact 4 étant continu, tout l'ensemble mobile est ensuite déplacé, le piston 7 étant immobilisé par rapport au contact 4 par l'agencement des biellettes 8, 8', 9, 9', les galets 10, 10' se déplaçant dans la rainure horizontale 12, jusqu'à la position d'ouverture représentée sur la figure 4.The displacement of the contact 4 being continuous, the whole mobile assembly is then displaced, the piston 7 being immobilized with respect to the contact 4 by the arrangement of the links 8, 8 ', 9, 9', the rollers 10, 10 'are moving in the horizontal groove 12, to the open position shown in Figure 4.

Le piston 7 et le contact 4 ont grâce à cet agencement la même vitesse de déplacement et il est donc inutile de prévoir un clapet unidirectionnel dans l'orifice 15A de la couronne 15.The piston 7 and the contact 4 have, thanks to this arrangement, the same speed of movement and it is therefore unnecessary to provide a one-way valve in the orifice 15A of the crown 15.

La refermeture du disjoncteur s'effectue par les mêmes déplacements dans le sens inverse.The circuit breaker is closed again by the same movements in the opposite direction.

Claims (4)

1) Disjoncteur comprenant dans une enveloppe (1) remplie de gaz diélectrique, un premier contact d'arc (2) relié à une première prise de courant, un second contact d'arc (4) de même axe longitudinal que le premier contact et relié à une seconde prise de courant et mobile axialement dans un cylindre fixe (6) et formant avec un piston (7) mobile une chambre de compression (3), le disjoncteur comportant des moyens d'entraînement du piston (7) dans un sens opposé à celui du déplacement du second contact (4), caractérisé en ce que ces moyens d'entraînement agissent pendant une première partie du déplacement du contact mobile (4) entre la position de fermeture et la position d'ouverture et en ce qu'il comporte des moyens d'immobilisation du piston (7) par rapport au contact mobile (4) pendant une seconde partie de ce même déplacement du contact mobile (4). 1) Circuit breaker comprising in a casing (1) filled with dielectric gas, a first arcing contact (2) connected to a first socket, a second arcing contact (4) having the same longitudinal axis as the first contact and connected to a second outlet and axially movable in a fixed cylinder (6) and forming with a movable piston (7) a compression chamber (3), the circuit breaker comprising means for driving the piston (7) in one direction opposite to that of the displacement of the second contact (4), characterized in that these drive means act during a first part of the displacement of the movable contact (4) between the closed position and the open position and in that it comprises means for immobilizing the piston (7) relative to the movable contact (4) during a second part of this same movement of the movable contact (4). 2) Disjoncteur selon la revendication 1, caractérisé en ce que les moyens d'entraînement sont constitués d'au moins deux biellettes (8, 9) dont une extrémité est articulée sur un élément de guidage (10) et dont l'autre extrémité est articulée pour la première biellette (8) sur le piston (7) et pour la seconde biellette (9) sur le contact mobile (4), l'élément de guidage (10) se déplaçant librement dans une première rainure (11) perpendiculaire à l'axe longitudinal du second contact (4) et agencée sur une partie fixe et les deux biellettes (8, 9) étant disposées de part et d'autre d'un plan vertical passant par l'axe longitudinal de la première rainure (11). 2) Circuit breaker according to claim 1, characterized in that the drive means consist of at least two rods (8, 9), one end of which is articulated on a guide element (10) and the other end of which is articulated for the first link (8) on the piston (7) and for the second link (9) on the movable contact (4), the guide element (10) moving freely in a first groove (11) perpendicular to the longitudinal axis of the second contact (4) and arranged on a fixed part and the two links (8, 9) being arranged on either side of a vertical plane passing through the longitudinal axis of the first groove (11 ). 3) Disjoncteur selon la revendication 2, caractérisé en ce que les moyens d'immobilisation sont constitués desdites biellettes (8, 9) et dudit élément de guidage (10) se déplaçant dans au moins une seconde rainure (12) parallèle à l'axe longitudinal du second contact (4) et raccordée à la première rainure (11). 3) Circuit breaker according to claim 2, characterized in that the immobilization means consist of said links (8, 9) and said guide element (10) moving in at least a second groove (12) parallel to the axis longitudinal of the second contact (4) and connected to the first groove (11). 4) Disjoncteur selon la revendication 2 ou 3, caractérisé en ce que ladite partie fixe est le cylindre fixe (6). 4) Circuit breaker according to claim 2 or 3, characterized in that said fixed part is the fixed cylinder (6).
EP95400112A 1994-01-25 1995-01-19 Puffer-type gas-blast circuit breaker with double movement Withdrawn EP0664552A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9400764A FR2715500B1 (en) 1994-01-25 1994-01-25 Self-blowing and double movement circuit breaker.
FR9400764 1994-01-25

Publications (1)

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EP0664552A1 true EP0664552A1 (en) 1995-07-26

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EP95400112A Withdrawn EP0664552A1 (en) 1994-01-25 1995-01-19 Puffer-type gas-blast circuit breaker with double movement

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US (1) US5587571A (en)
EP (1) EP0664552A1 (en)
FR (1) FR2715500B1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0766278A2 (en) * 1995-09-30 1997-04-02 Asea Brown Boveri Ag Circuit breaker
EP0780859A1 (en) * 1995-12-21 1997-06-25 Gec Alsthom T&D Ag Gas blast switch with brake arrangement on opening
EP0785562A1 (en) * 1996-01-22 1997-07-23 Gec Alsthom T & D Sa Circuit breaker having contacts with double movement
FR2756413A1 (en) * 1996-11-28 1998-05-29 Gec Alsthom T & D Sa SEMI-MOBILE PISTON CIRCUIT BREAKER
FR2766609A1 (en) * 1997-07-24 1999-01-29 Gec Alsthom T & D Sa GAS SWITCH WITH COMPRESSIBLE THERMAL EXPANSION VOLUME
WO2022204996A1 (en) * 2021-03-30 2022-10-06 华为数字能源技术有限公司 Circuit breaker and power supply system

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
JP2006164673A (en) * 2004-12-06 2006-06-22 Hitachi Ltd Current breaking method of puffer type gas-blast circuit breaker and puffer type gas-blast circuit breaker using it

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FR2354625A1 (en) * 1976-06-10 1978-01-06 Merlin Gerin Contact breaker with automatic spark suppression - has gas compressing piston driven by movement of one electrode
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CH667943A5 (en) * 1985-07-16 1988-11-15 Sprecher Energie Ag Pressurised gas switch mechanism - has non-linear drive coupling between drive rod and piston-cylinder device for arc extinction gas jet
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FR2683383A1 (en) * 1991-11-04 1993-05-07 Alsthom Gec HIGH OR MEDIUM VOLTAGE CIRCUIT BREAKER WITH TRIPLE MOTION.
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

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Publication number Priority date Publication date Assignee Title
FR2354625A1 (en) * 1976-06-10 1978-01-06 Merlin Gerin Contact breaker with automatic spark suppression - has gas compressing piston driven by movement of one electrode
DE3127678A1 (en) * 1981-07-14 1983-02-10 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau HIGH VOLTAGE CIRCUIT BREAKERS
CH667943A5 (en) * 1985-07-16 1988-11-15 Sprecher Energie Ag Pressurised gas switch mechanism - has non-linear drive coupling between drive rod and piston-cylinder device for arc extinction gas jet
DE3942489A1 (en) * 1989-12-22 1991-06-27 Licentia Gmbh Gas-blow-out switch - optimises blow-out by using arrester to release 2nd bottom walling of compression space to allow movement and closure of non-return valve
FR2683383A1 (en) * 1991-11-04 1993-05-07 Alsthom Gec HIGH OR MEDIUM VOLTAGE CIRCUIT BREAKER WITH TRIPLE MOTION.
EP0540971A1 (en) * 1991-11-04 1993-05-12 Gec Alsthom Sa High- or medium-voltage circuit breaker with triple motion
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 (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0766278A3 (en) * 1995-09-30 1998-11-04 Asea Brown Boveri Ag Circuit breaker
EP0766278A2 (en) * 1995-09-30 1997-04-02 Asea Brown Boveri Ag Circuit breaker
US5767471A (en) * 1995-12-21 1998-06-16 Gec Alsthom T & D Ag Pressurized gas circuit-breaker
EP0780859A1 (en) * 1995-12-21 1997-06-25 Gec Alsthom T&D Ag Gas blast switch with brake arrangement on opening
FR2743936A1 (en) * 1996-01-22 1997-07-25 Gec Alsthom T & D Sa CIRCUIT BREAKER WITH DOUBLE MOTION OF CONTACTS
EP0785562A1 (en) * 1996-01-22 1997-07-23 Gec Alsthom T & D Sa Circuit breaker having contacts with double movement
EP0845796A1 (en) * 1996-11-28 1998-06-03 Gec Alsthom T & D Sa Circuit breaker with semi mobile piston
FR2756413A1 (en) * 1996-11-28 1998-05-29 Gec Alsthom T & D Sa SEMI-MOBILE PISTON CIRCUIT BREAKER
US5859399A (en) * 1996-11-28 1999-01-12 Gec Alsthom T & D Sa Circuit breaker having semi-moving piston
FR2766609A1 (en) * 1997-07-24 1999-01-29 Gec Alsthom T & D Sa GAS SWITCH WITH COMPRESSIBLE THERMAL EXPANSION VOLUME
EP0895262A1 (en) * 1997-07-24 1999-02-03 Gec Alsthom T & D Sa Gas circuit breaker with compressible volume and thermal expansion
US5939692A (en) * 1997-07-24 1999-08-17 Gec Alsthom T & D Sa Gas-filled interrupter with compressible thermal expansion chamber
WO2022204996A1 (en) * 2021-03-30 2022-10-06 华为数字能源技术有限公司 Circuit breaker and power supply system

Also Published As

Publication number Publication date
FR2715500A1 (en) 1995-07-28
US5587571A (en) 1996-12-24
FR2715500B1 (en) 1996-02-16

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