EP0897185B1 - Gas-blast circuit breaker with reduced compression - Google Patents

Gas-blast circuit breaker with reduced compression Download PDF

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Publication number
EP0897185B1
EP0897185B1 EP98402007A EP98402007A EP0897185B1 EP 0897185 B1 EP0897185 B1 EP 0897185B1 EP 98402007 A EP98402007 A EP 98402007A EP 98402007 A EP98402007 A EP 98402007A EP 0897185 B1 EP0897185 B1 EP 0897185B1
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EP
European Patent Office
Prior art keywords
piston
tube
circuit
contact assembly
moving contact
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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.)
Expired - Lifetime
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EP98402007A
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German (de)
French (fr)
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EP0897185A1 (en
Inventor
Edmond Thuries
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Grid Solutions SAS
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Areva T&D SAS
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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 circuit breaker with self-blowing and reduced compression, especially high tension.
  • 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 during an opening operation between a closed position and an open position
  • the mobile contact assembly being constituted by a first tube delimiting with a second tube coaxial with the first tube, on either side of a crown connected to the first tube and in the second tube, a blowing chamber and a compression communicating with the blowing chamber and closed by a semi-mobile piston
  • this circuit breaker comprising 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 mobile contact.
  • said means include pneumatic means cooperating with mechanical means.
  • the second mechanical means for axially moving the piston include a drive member integral with the assembly of mobile contact which drives 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 member and a piston end wall and a fixed retainer cooperating with a stop wall of the piston. The way pneumatic is a means of vacuuming the space between the fixed retaining member and the abutment wall, this space being sealed.
  • the object of the invention is to provide a circuit breaker with reduced manufacturing compression simpler and therefore less expensive, which does not require actuation energy important.
  • the first means to immobilize the piston include a fixed retainer blocking a linked stopper arrangement to the piston and the second means for axially displacing the piston include a member for unlocking said arrangement stop, integral with the movable contact assembly.
  • the piston is consisting of an annular pressure element and a rear cylinder whose internal diameter is substantially equal to the external diameter of the second tube over a length greater than said first part of displacement.
  • the stop arrangement is consisting of at least one ball housed in a recess made in said rear cylinder and of larger diameter to the thickness of this cylinder.
  • the stop arrangement is consisting of at least one flexible blade secured to one of its ends of said rear cylinder and bearing to its other end a bead-shaped element housed in a recess made in said rear cylinder and thick radial greater than the thickness of this cylinder.
  • the retaining member consists of a fixed cylinder comprising at one of its ends a housing receiving said stopper arrangement.
  • the unlocking member is constituted by a smaller diameter of the second tube in front of said length, i.e. on the contact side, the difference in diameter between this lower diameter and the diameter of said length being such that the stop member releases said housing for receiving the retaining member, when the mobile contact assembly has traversed said first displacement part.
  • the self-blowing type circuit breaker shown in Figures 1 to 4 includes an envelope 1 filled with a gas dielectric under pressure, two arcing contacts 2A, 4A cooperating with each other, at least one 4A being part of a movable contact assembly integral with a operation 3 and adapted to be moved axially in envelope 1 during an opening maneuver between a closed position and an open position.
  • the mobile contact assembly consists of a first tube 6 delimiting with a second tube 7 coaxial with the first tube and diameter smaller than that of the first tube, on either side of a crown 8 connected to the first tube 6 and in the second tube 7, a blowing chamber 16 closed by a nozzle 12 and a compression chamber 9 communicating with the blowing chamber 16 and closed by a semi-mobile piston 11 equipped with at least one valve unidirectional 22 preventing gas from leaving the chamber compression 9.
  • the crown 8 is provided with orifices equipped with one-way valves 10 allowing passage gas from the compression chamber 9 to the blowing 16.
  • the first tube 6 slides on a fixed tube 3 via sliding contacts.
  • the circuit breaker also conventionally comprises permanent contacts 2, 4.
  • This circuit breaker includes first means for immobilize the piston during the first part of the displacement of the movable contact assembly between the closed position and the open position and second means for axially moving the piston with the moving contact assembly for a second part of this same movement of the movable contact assembly.
  • the first means to immobilize the piston include a fixed retainer blocking an arrangement stop linked to the piston 11 and the second means for axially move the piston 11 include a release of said stop arrangement, integral with the assembly of mobile contact.
  • the piston 11 consists of an annular element 11A pressure, constituting the face retaining the pressure, equipped with said 10A one-way valves and a cylinder 11B rear (i.e. on the side opposite the 2A contacts, 4A).
  • This rear cylinder 11B is of variable diameter on its length but essentially it's internal diameter substantially equal to the external diameter of part 7A of the second tube 7 of a length greater than said first displacement part.
  • the first means to immobilize the piston therefore include a fixed retainer blocking a stop arrangement linked to the piston 11.
  • the stop arrangement consists of at least one ball 20 housed in a recess made in said cylinder rear 11B and of diameter greater than the thickness of this cylinder 11B.
  • the stop arrangement consists of at least one flexible blade 21 secured to one of its ends of said rear cylinder 11B and carrying at its other end a bead-shaped element 22 housed in a recess made in said rear cylinder 11B and of thickness radial greater than the thickness of this cylinder 11B.
  • the retaining member 23 is consisting of a fixed cylinder comprising at one of its ends a housing for receiving said arrangement of stop.
  • the stop arrangement is completed by a compression spring (not shown in the figures) set up in the room compression 9 between crown 8 and piston 11, which provides a stop unilateral towards the rear of the balls against the housing for receiving the organ of restraint 23 and avoids possible effects jamming of the balls 20.
  • a compression spring (not shown in the figures) set up in the room compression 9 between crown 8 and piston 11, which provides a stop unilateral towards the rear of the balls against the housing for receiving the organ of restraint 23 and avoids possible effects jamming of the balls 20.
  • the second means for axially moving the piston 11 therefore comprise a member for unlocking said arrangement stop, integral with the movable contact assembly.
  • the release member is constituted by a smaller diameter of the second tube 7 outside the part 7A, in front of it, that is to say on the side of contact.
  • the difference in diameter between this diameter lower and the diameter of part 7A is such that the abutment member releases said receiving housing from the retaining member 23, when the movable contact assembly has traversed said first part of the displacement, namely the compression stroke.
  • Arc contacts 2A and 4A are in position fully fitted and the piston 11 is in position immobilized, its annular element 11A defining with the crown 8 a maximum compression volume 9.
  • the end of the rear cylinder 11B carrying the stop member, either the balls 20, or the blades 21 provided with their bead 22, is located on the part 7A of larger diameter and the balls 20 or beads 22, in contact on this part 7A, protrude of their recess opposite the second tube 7 where they are housed in the receiving housing of the retaining member 23.
  • the stop element (balls 20 or beads 22) can then move to tube 7 of smaller diameter and by this displacement frees the receiving housing from the retainer 23 which then no longer blocks the piston 11 which given the pressure of the gas in the volume of compression moves with the moving contact assembly to reach the open position shown on the figures 2 or 4.

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  • Circuit Breakers (AREA)
  • Push-Button Switches (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Electronic Switches (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

A fixed retention unit blocks the piston (11) whilst the contacts are removed and a second unblocking unit releases the piston.

Description

La présente invention se rapporte à un disjoncteur à auto-soufflage et à compression réduite, en particulier à haute tension.The present invention relates to a circuit breaker with self-blowing and reduced compression, especially high tension.

On connaít du document FR-2 715 499 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 lors d'une manoeuvre d'ouverture entre une position de fermeture et une position d'ouverture, l'ensemble de contact mobile étant constitué par un premier tube délimitant avec un second tube coaxial au premier tube, de part et d'autre d'une couronne reliée au premier tube et au second tube, une chambre de soufflage et une chambre de compression communiquant avec la chambre de soufflage et fermée par un piston semi-mobile, ce disjoncteur comportant 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.We know from document FR-2 715 499 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 during an opening operation between a closed position and an open position, the mobile contact assembly being constituted by a first tube delimiting with a second tube coaxial with the first tube, on either side of a crown connected to the first tube and in the second tube, a blowing chamber and a compression communicating with the blowing chamber and closed by a semi-mobile piston, this circuit breaker comprising 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 mobile contact.

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 flow of gas coming from the 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.

Selon ce document antérieur, lesdits moyens comportent un moyen pneumatique coopérant avec des moyens mécaniques.According to this prior document, said means include pneumatic means cooperating with mechanical means.

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. 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. 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.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 drives 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 member and a piston end wall and a fixed retainer cooperating with a stop wall of the piston. The way pneumatic is a means of vacuuming the space between the fixed retaining member and the abutment wall, this space being sealed.

Un tel agencement est relativement complexe et d'un coût de fabrication important.Such an arrangement is relatively complex and of a significant manufacturing cost.

Le but de l'invention est de réaliser un disjoncteur à compression réduite de fabrication plus simple et donc moins coûteuse, qui ne nécessite pas une énergie d'actionnement importante.The object of the invention is to provide a circuit breaker with reduced manufacturing compression simpler and therefore less expensive, which does not require actuation energy important.

Pour ce faire, conformément à l'invention, les premiers moyens pour immobiliser le piston comprennent un organe de retenue fixe bloquant un agencement de butée lié au piston et les seconds moyens pour déplacer axialement le piston comprennent un organe de déblocage dudit agencement de butée, solidaire de l'ensemble de contact mobile.To do this, in accordance with the invention, the first means to immobilize the piston include a fixed retainer blocking a linked stopper arrangement to the piston and the second means for axially displacing the piston include a member for unlocking said arrangement stop, integral with the movable contact assembly.

Selon le mode de réalisation préféré, le piston est constitué d'un élément annulaire de pression et d'un cylindre arrière dont le diamètre interne est sensiblement égal au diamètre externe du second tube sur une longueur supérieure à ladite première partie de déplacement. According to the preferred embodiment, the piston is consisting of an annular pressure element and a rear cylinder whose internal diameter is substantially equal to the external diameter of the second tube over a length greater than said first part of displacement.

Selon une première variante, l'agencement de butée est constitué d'au moins une bille logée dans un évidement réalisé dans ledit cylindre arrière et de diamètre supérieur à l'épaisseur de ce cylindre.According to a first variant, the stop arrangement is consisting of at least one ball housed in a recess made in said rear cylinder and of larger diameter to the thickness of this cylinder.

Selon une seconde variante, l'agencement de butée est constitué d'au moins une lame flexible solidaire à une de ses extrémités dudit cylindre arrière et portant à son autre extrémité un élément en forme de bourrelet logé dans un évidement réalisé dans ledit cylindre arrière et d'épaisseur radiale supérieure à l'épaisseur de ce cylindre.According to a second variant, the stop arrangement is consisting of at least one flexible blade secured to one of its ends of said rear cylinder and bearing to its other end a bead-shaped element housed in a recess made in said rear cylinder and thick radial greater than the thickness of this cylinder.

De préférence, l'organe de retenue est constitué d'un cylindre fixe comportant à une de ses extrémités un logement de réception dudit agencement de butée.Preferably, the retaining member consists of a fixed cylinder comprising at one of its ends a housing receiving said stopper arrangement.

De préférence, l'organe de déblocage est constitué par un diamètre inférieur du second tube en avant de ladite longueur, c'est-à-dire du côté des contacts, la différence de diamètre entre ce diamètre inférieur et le diamètre de ladite longueur étant telle que l'organe de butée libère ledit logement de réception de l'organe de retenue, lorsque l'ensemble de contact mobile a parcouru ladite première partie de déplacement.Preferably, the unlocking member is constituted by a smaller diameter of the second tube in front of said length, i.e. on the contact side, the difference in diameter between this lower diameter and the diameter of said length being such that the stop member releases said housing for receiving the retaining member, when the mobile contact assembly has traversed said first displacement part.

L'invention est décrite ci-après plus en détail à l'aide de figures ne représentant qu'un mode de réalisation préféré de l'invention.

  • La figure 1 est une vue en coupe longitudinale d'un disjoncteur conforme à l'invention en position de fermeture, selon une première variante de réalisation.
  • La figure 2 est une vue en coupe longitudinale de ce même disjoncteur en position d'ouverture.
  • La figure 3 est une vue en coupe longitudinale d'un disjoncteur conforme à l'invention en position de fermeture, selon une seconde variante de réalisation.
  • La figure 4 est une vue en coupe longitudinale de ce même disjoncteur en position d'ouverture.
    • The invention is described below in more detail using figures showing only a preferred embodiment of the invention.
  • Figure 1 is a longitudinal sectional view of a circuit breaker according to the invention in the closed position, according to a first embodiment.
  • Figure 2 is a longitudinal sectional view of the same circuit breaker in the open position.
  • Figure 3 is a longitudinal sectional view of a circuit breaker according to the invention in the closed position, according to a second alternative embodiment.
  • Figure 4 is a longitudinal sectional view of the same circuit breaker in the open position.

    • Le disjoncteur du type à auto-soufflage représenté sur les figures 1 à 4 comprend une enveloppe 1 remplie d'un gaz diélectrique sous pression, deux contacts d'arc 2A, 4A coopérant entre eux, l'un 4A au moins faisant partie d'un ensemble de contact mobile solidaire d'un organe de manoeuvre 3 et adapté pour être déplacé axialement dans l'enveloppe 1 lors d'une manoeuvre d'ouverture entre une position de fermeture et une position d'ouverture. L'ensemble de contact mobile est constitué par un premier tube 6 délimitant avec un second tube 7 coaxial au premier tube et de diamètre inferieur à celui du premier tube, de part et d'autre d'une couronne 8 reliée au premier tube 6 et au second tube 7, une chambre de soufflage 16 fermée par une buse 12 et une chambre de compression 9 communiquant avec la chambre de soufflage 16 et fermée par un piston semi-mobile 11 équipé d'au moins un clapet unidirectionnel 22 empêchant la sortie du gaz de la chambre de compression 9. La couronne 8 est pourvue d'orifices équipés de clapets unidirectionnels 10 permettant le passage du gaz de la chambre de compression 9 vers la chambre de soufflage 16. Le premier tube 6 coulisse sur un tube fixe 3 par l'intermédiaire de contacts glissants.The self-blowing type circuit breaker shown in Figures 1 to 4 includes an envelope 1 filled with a gas dielectric under pressure, two arcing contacts 2A, 4A cooperating with each other, at least one 4A being part of a movable contact assembly integral with a operation 3 and adapted to be moved axially in envelope 1 during an opening maneuver between a closed position and an open position. The mobile contact assembly consists of a first tube 6 delimiting with a second tube 7 coaxial with the first tube and diameter smaller than that of the first tube, on either side of a crown 8 connected to the first tube 6 and in the second tube 7, a blowing chamber 16 closed by a nozzle 12 and a compression chamber 9 communicating with the blowing chamber 16 and closed by a semi-mobile piston 11 equipped with at least one valve unidirectional 22 preventing gas from leaving the chamber compression 9. The crown 8 is provided with orifices equipped with one-way valves 10 allowing passage gas from the compression chamber 9 to the blowing 16. The first tube 6 slides on a fixed tube 3 via sliding contacts.

    Le disjoncteur comporte également de façon classique des contacts permanents 2, 4.The circuit breaker also conventionally comprises permanent contacts 2, 4.

    Ce disjoncteur comporte 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.This circuit breaker includes first means for immobilize the piston during the first part of the displacement of the movable contact assembly between the closed position and the open position and second means for axially moving the piston with the moving contact assembly for a second part of this same movement of the movable contact assembly.

    Les premiers moyens pour immobiliser le piston comprennent un organe de retenue fixe bloquant un agencement de butée lié au piston 11 et les seconds moyens pour déplacer axialement le piston 11 comprennent un organe de déblocage dudit agencement de butée, solidaire de l'ensemble de contact mobile.The first means to immobilize the piston include a fixed retainer blocking an arrangement stop linked to the piston 11 and the second means for axially move the piston 11 include a release of said stop arrangement, integral with the assembly of mobile contact.

    Le piston 11 est constitué d'un élément annulaire 11A de pression, constituant la face retenant la pression, équipé desdits clapets unidirectionnels 10A et d'un cylindre 11B arrière (c'est-à-dire du côté opposé aux contacts 2A, 4A). Ce cylindre arrière 11B est de diamètre variable sur sa longueur mais essentiellement il est de diamètre interne sensiblement égal au diamètre externe d'une partie 7A du second tube 7 d'une longueur supérieure à ladite première partie de déplacement.The piston 11 consists of an annular element 11A pressure, constituting the face retaining the pressure, equipped with said 10A one-way valves and a cylinder 11B rear (i.e. on the side opposite the 2A contacts, 4A). This rear cylinder 11B is of variable diameter on its length but essentially it's internal diameter substantially equal to the external diameter of part 7A of the second tube 7 of a length greater than said first displacement part.

    Les premiers moyens pour immobiliser le piston comprennent donc un organe de retenue fixe bloquant un agencement de butée lié au piston 11.The first means to immobilize the piston therefore include a fixed retainer blocking a stop arrangement linked to the piston 11.

    Selon la première variante représentée sur les figures 1 et 2, l'agencement de butée est constitué d'au moins une bille 20 logée dans un évidement réalisé dans ledit cylindre arrière 11B et de diamètre supérieur à l'épaisseur de ce cylindre 11B.According to the first variant shown in the figures 1 and 2, the stop arrangement consists of at least one ball 20 housed in a recess made in said cylinder rear 11B and of diameter greater than the thickness of this cylinder 11B.

    Selon la seconde variante représentée sur les figures 3 et 4, l'agencement de butée est constitué d'au moins une lame flexible 21 solidaire à une de ses extrémités dudit cylindre arrière 11B et portant à son autre extrémité un élément en forme de bourrelet 22 logé dans un évidement réalisé dans ledit cylindre arrière 11B et d'épaisseur radiale supérieure à l'épaisseur de ce cylindre 11B.According to the second variant shown in the figures 3 and 4, the stop arrangement consists of at least one flexible blade 21 secured to one of its ends of said rear cylinder 11B and carrying at its other end a bead-shaped element 22 housed in a recess made in said rear cylinder 11B and of thickness radial greater than the thickness of this cylinder 11B.

    Selon les deux variantes, l'organe de retenue 23 est constitué d'un cylindre fixe comportant à une de ses extrémités un logement de réception dudit agencement de butée.According to the two variants, the retaining member 23 is consisting of a fixed cylinder comprising at one of its ends a housing for receiving said arrangement of stop.

    En option de cette première variante, l'agencement de butée est complété par un ressort de compression (non représenté aux figures) mis en place dans la chambre de compression 9 entre la couronne 8 et le piston 11, ce qui assure une butée unilatérale vers l'arrière des billes contre le logement de réception de l'organe de retenue 23 et évite d'éventuels effets de coincement des billes 20.As an option of this first variant, the stop arrangement is completed by a compression spring (not shown in the figures) set up in the room compression 9 between crown 8 and piston 11, which provides a stop unilateral towards the rear of the balls against the housing for receiving the organ of restraint 23 and avoids possible effects jamming of the balls 20.

    Les seconds moyens pour déplacer axialement le piston 11 comprennent donc un organe de déblocage dudit agencement de butée, solidaire de l'ensemble de contact mobile.The second means for axially moving the piston 11 therefore comprise a member for unlocking said arrangement stop, integral with the movable contact assembly.

    Selon les deux variantes, l'organe de déblocage est constitué par un diamètre inférieur du second tube 7 hors la partie 7A, en avant de celle-ci, c'est-à-dire du côté des contacts. La différence de diamètre entre ce diamètre inférieur et le diamètre de la partie 7A est telle que l'organe de butée libère ledit logement de réception de l'organe de retenue 23, lorsque l'ensemble de contact mobile a parcouru ladite première partie de déplacement, soit la course de compression.According to the two variants, the release member is constituted by a smaller diameter of the second tube 7 outside the part 7A, in front of it, that is to say on the side of contact. The difference in diameter between this diameter lower and the diameter of part 7A is such that the abutment member releases said receiving housing from the retaining member 23, when the movable contact assembly has traversed said first part of the displacement, namely the compression stroke.

    La fonction de ces différentes pièces va maintenant être explicitée par la description d'une manoeuvre d'ouverture du disjoncteur.The function of these different parts will now be explained by the description of a maneuver circuit breaker opening.

    . Sur les figures 1 et 3, le disjoncteur est en position fermée.. In Figures 1 and 3, the circuit breaker is in position closed.

    Les contacts d'arc 2A et 4A sont en position complètement emboítée et le piston 11 est en position immobilisée, son élément annulaire 11A définissant avec la couronne 8 un volume de compression 9 maximal.Arc contacts 2A and 4A are in position fully fitted and the piston 11 is in position immobilized, its annular element 11A defining with the crown 8 a maximum compression volume 9.

    Dans cette position, l'extrémité du cylindre arrière 11B portant l'organe de butée, soit les billes 20, soit les lames 21 pourvues de leur bourrelet 22, se situe sur la partie 7A de diamètre supérieur et les billes 20 ou les bourrelets 22, en contact sur cette partie 7A, font saillie de leur évidement à l'opposé du second tube 7 où ils sont logés dans le logement de réception de l'organe de retenue 23.In this position, the end of the rear cylinder 11B carrying the stop member, either the balls 20, or the blades 21 provided with their bead 22, is located on the part 7A of larger diameter and the balls 20 or beads 22, in contact on this part 7A, protrude of their recess opposite the second tube 7 where they are housed in the receiving housing of the retaining member 23.

    Lors de la manoeuvre d'ouverture, l'ensemble de contact mobile est déplacé vers la droite (vu selon les figures) et tant que l'organe de butée (billes 20 ou bourrelet 22) se trouve roulant ou glissant sur la partie 7A, il est bloqué par l'organe de retenue 23 et le piston 11 est donc immobilisé.During the opening operation, all of moving contact is moved to the right (seen according to figures) and as long as the stop member (balls 20 or bead 22) is rolling or sliding on the part 7A, it is blocked by the retaining member 23 and the piston 11 is therefore immobilized.

    La fin de la compression, c'est-à-dire le passage à la seconde partie de déplacement où le piston 11 est déplacé axialement avec l'ensemble de contact mobile, est réalisée lorsque l'organe de butée (billes 20 ou bourrelets 22) se situe hors de la partie 7A, dans la position représentée sur les figures 2 et 4.The end of compression, i.e. the transition to second part of movement where the piston 11 is moved axially with the movable contact assembly, is made when the stop member (balls 20 or beads 22) is located outside part 7A, in the position shown on Figures 2 and 4.

    L'élément de butée (billes 20 ou bourrelets 22) peut alors se déplacer vers le tube 7 de diamètre inférieur et par ce déplacement libère le logement de réception de l'organe de retenue 23 qui ne bloque plus alors le piston 11 qui compte tenu de la pression du gaz dans le volume de compression se déplace avec l'ensemble de contact mobile pour arriver en position d'ouverture représentée sur les figures 2 ou 4.The stop element (balls 20 or beads 22) can then move to tube 7 of smaller diameter and by this displacement frees the receiving housing from the retainer 23 which then no longer blocks the piston 11 which given the pressure of the gas in the volume of compression moves with the moving contact assembly to reach the open position shown on the figures 2 or 4.

    Claims (7)

    1. Circuit-breaker of the puffer type, comprising a casing (1) filled with a dielectric gas under pressure, and two arcing contacts (2A, 4A) cooperating with each other, at least one of the arcing contacts (4A) being part of a moving contact assembly secured to a drive member (3) and organized to be displaced axially inside the casing (1) between a closed position and an open position on being driven during an opening operation, the moving contact assembly being made up of a first tube (6) defining with a second tube (7) that is coaxial to the first tube firstly a blast chamber (16), on one side of a ring (8) connected both to the first tube (6) and to the second tube (7) , and secondly a compression chamber (9) on the other side of said ring, communicating with the blast chamber (16), and closed by a semi-moving piston (11), the circuit-breaker being provided with first means for holding the piston (11) stationary during a first portion of the displacement stroke of the moving contact assembly between the closed position and the open position, and with second means for displacing the piston (11) axially with the moving contact assembly during a second portion of the same displacement stroke of the moving contact assembly, said circuit-breaker being characterized in that the first means for holding the piston (11) stationary comprise a stationary retaining member (23) for locking an abutment arrangement associated with the piston (11), and the second means for axially displacing the piston (11) comprise an unlocking member for unlocking said abutment arrangement, which member is associated with the moving contact assembly.
    2. Circuit-breaker according to claim 1, characterized in that the piston (11) constituted by an annular pressure element (11A), and by a rear cylinder (11B) whose inside diameter is substantially equal to the outside diameter of the second tube (7) over a length greater than the length of said first portion of the displacement stroke.
    3. Circuit-breaker according to claim 1 or 2, characterized in that the retaining member (23) is constituted by a stationary cylinder having one of its ends provided with a recess for receiving said abutment arrangement.
    4. Circuit-breaker according to claim 2 or 3, characterized in that the abutment arrangement is constituted by at least one bail (20) which is received in a slot provided in said rear cylinder (11B), and which is of diameter greater than the thickness of the cylinder (11B).
    5. Circuit-Breaker according to claim 4, characterized in that it comprises a compression spring placed in the compression chamber (9).
    6. Circuit-breaker according to claim 2 or 3, characterized in that the abutment arrangement is constituted by at least one flexible blade (21) secured at one of its ends to said rear cylinder (11B), and carrying at its other end a. collar-shaped element (22) which is received in a slot provided in said rear cylinder (11B) and which is of radial thickness greater than the thickness of said cylinder (11B).
    7. Circuit-breaker according to any one of claims 2 to 6, characterized in that the unlocking member is constituted by a smaller-diameter portion of the second tube (7) in front of said length, i.e. closer to the contacts, the difference between the smaller diameter and the diameter of said length being such that the abutment member releases said recess in the retaining member (23) once the moving contact assembly has travelled over said first portion of the displacement stroke.
    EP98402007A 1997-08-11 1998-08-06 Gas-blast circuit breaker with reduced compression Expired - Lifetime EP0897185B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9710260A FR2767221B1 (en) 1997-08-11 1997-08-11 SELF-BLOWING AND REDUCED COMPRESSION CIRCUIT BREAKER
    FR9710260 1997-08-11

    Publications (2)

    Publication Number Publication Date
    EP0897185A1 EP0897185A1 (en) 1999-02-17
    EP0897185B1 true EP0897185B1 (en) 2004-11-24

    Family

    ID=9510224

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98402007A Expired - Lifetime EP0897185B1 (en) 1997-08-11 1998-08-06 Gas-blast circuit breaker with reduced compression

    Country Status (5)

    Country Link
    US (1) US6018133A (en)
    EP (1) EP0897185B1 (en)
    AT (1) ATE283547T1 (en)
    DE (1) DE69827711T2 (en)
    FR (1) FR2767221B1 (en)

    Families Citing this family (9)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2807870B1 (en) * 2000-04-18 2002-05-24 Alstom ARC BLOWER SWITCH HAVING REDUCED GAS COMPRESSION CUTTING CHAMBER AND RECIPROCATING PISTON MOVEMENT
    EP1686602B2 (en) * 2005-02-01 2021-04-07 ABB Power Grids Switzerland AG Blast nozzle mounting means for electrical circuit breaker
    FR2892851B1 (en) 2005-11-03 2013-12-06 Areva T & D Sa CURRENT CURRENT CHAMBER WITH DOUBLE COMPRESSION CHAMBER
    FR2922043B1 (en) 2007-10-03 2009-12-11 Areva T & D Sa BREAKER BREAKER CHAMBER WITH DOUBLE VOLUME OF COMPRESSION
    EP2249364A1 (en) 2009-05-07 2010-11-10 ABB Research Ltd. Method for creating mechanically compressed discharge gas in a gas-isolated high voltage switch and devices for carrying out the method
    CN101930871B (en) * 2010-08-25 2012-11-21 中国西电电气股份有限公司 Arc extinguish chamber with high current-carrying capability for high-voltage switch equipment
    KR101622422B1 (en) * 2011-07-20 2016-05-18 엘에스산전 주식회사 Gas Circuit Breaker
    DE102011083594A1 (en) * 2011-09-28 2013-03-28 Siemens Aktiengesellschaft Circuit-breaker interrupter unit
    US9305726B2 (en) * 2014-08-27 2016-04-05 Eaton Corporation Arc extinguishing contact assembly for a circuit breaker assembly

    Family Cites Families (6)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE2347605A1 (en) * 1973-09-18 1975-03-20 Siemens Ag ELECTRIC PRESSURE GAS SWITCH
    GB1459727A (en) * 1974-09-17 1976-12-31 Siemens Ag Electrical gas-blast circuit breaker
    EP0061992B1 (en) * 1981-03-30 1986-11-20 Ernst Slamecka High-voltage gas-blast puffer type circuit-breaker
    FR2715499B1 (en) * 1994-01-25 1996-03-15 Gec Alsthom T & D Sa Self-blowing circuit breaker with pneumatically locked piston.
    FR2745947B1 (en) * 1996-03-11 1998-04-10 Gec Alsthom T & D Sa REDUCED SELF-PRESSURE CIRCUIT BREAKER
    FR2756413B1 (en) * 1996-11-28 1998-12-31 Gec Alsthom T & D Sa SEMI-MOBILE PISTON CIRCUIT BREAKER

    Also Published As

    Publication number Publication date
    FR2767221B1 (en) 1999-09-10
    US6018133A (en) 2000-01-25
    DE69827711T2 (en) 2005-11-24
    ATE283547T1 (en) 2004-12-15
    DE69827711D1 (en) 2004-12-30
    EP0897185A1 (en) 1999-02-17
    FR2767221A1 (en) 1999-02-12

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