EP0239932B1 - High-tension gas blast circuit breaker - Google Patents

High-tension gas blast circuit breaker Download PDF

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Publication number
EP0239932B1
EP0239932B1 EP87104480A EP87104480A EP0239932B1 EP 0239932 B1 EP0239932 B1 EP 0239932B1 EP 87104480 A EP87104480 A EP 87104480A EP 87104480 A EP87104480 A EP 87104480A EP 0239932 B1 EP0239932 B1 EP 0239932B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
nozzle
contacts
arc
volume
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.)
Expired - Lifetime
Application number
EP87104480A
Other languages
German (de)
French (fr)
Other versions
EP0239932A1 (en
Inventor
Edmond Thuries
Denis Dufournet
Satoru Yanabu
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.)
Alstom Holdings SA
Original Assignee
GEC Alsthom SA
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Filing date
Publication date
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Publication of EP0239932A1 publication Critical patent/EP0239932A1/en
Application granted granted Critical
Publication of EP0239932B1 publication Critical patent/EP0239932B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc
    • 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
    • H01H33/901—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 making use of the energy of the arc or an auxiliary arc
    • H01H2033/902—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 making use of the energy of the arc or an auxiliary arc with the gases from hot space and compression volume following different paths to arc space or nozzle, i.e. the compressed gases do not pass through hot volume
    • 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
    • H01H2033/908—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 using valves for regulating communication between, e.g. arc space, hot volume, compression volume, surrounding volume

Definitions

  • the present invention relates to a pressurized dielectric gas circuit breaker, of the type comprising a blowing chamber and a thermal volume.
  • the blowing chamber comprises means such as a cylinder and piston to compress the gas during the opening operation and direct it, through a blowing nozzle, on the arc to be cut, like this. is for example known according to document FR-A-2 356 258.
  • thermal volume denotes a volume opening onto an area close to that where the arc is formed when the circuit breaker opens.
  • the gas of this volume is heated by the arc and its pressure increases.
  • the energy thus accumulated is generally used to contribute to the blowing of the arc and / or constitute an additional energy for the operation of the circuit breaker.
  • the arc In the case where the current to be cut is low (nominal current or lower), the arc is low and the thermal volume plays a negligible role in breaking the arc which must then be ensured by the blowing chamber.
  • the gas heated by the arc is sent directly to the arc to be cut.
  • this gas does not have all the dielectric qualities required for perfect arc cutting, due to the impurities it contains and the ionization of some of its molecules.
  • An object of the invention is to use the energy of the arc to send a jet of fresh gas onto the arc and not a hot and polluted gas.
  • Gas heated by the arc has sometimes been used to push fresh gas onto the arc with a piston.
  • An object of the invention is to push fresh gas without mechanical means.
  • the circuit breaker comprises an insulating envelope 1 and contains a dielectric gas such as sulfur hexafluoride under a pressure of a few bars.
  • the breaking chamber comprises a fixed assembly and a mobile assembly.
  • the fixed assembly comprises a metal block 2 connected to an outlet not shown; on the block 2 is fixed a part 3 comprising a tubular part 3A at the end of which is arranged a ring 4 constituting the fixed main contact of the circuit breaker.
  • a cylindrical part 6 in the thickness of which are formed channels such as 7 which pass through it parallel to its axis.
  • the annular volume between the cylinders 6 and 3A is designated by 8. Canals? communicate with the volume 8 by an annular volume 9 formed between the parts 3 and 6.
  • a tubular part 14 At the end of the tube 6, and on the interior side, is fixed a tubular part 14 to which is subjected a ring of arcing contact fingers 15.
  • an insulating tip 16 terminated by an annular electrode 17 with floating potential.
  • the fixed main contact is extended by an insulating nozzle 19 defining with the insulating nozzle 16 a passage 20.
  • the passage 20 communicates with the passage 8 by means of a movable valve 21, coming into contact under the action of a spring 22 with a step 6A of the tube 6.
  • the passage 20 also communicates, by a passage 24, with a blowing volume 25 delimited by an insulating cylinder 26, a semi-mobile piston 27 and a crown 3B forming part of the part 3.
  • the piston moves under the action of a spring 28 arranged in a tubular housing 29.
  • the piston is extended by a guide cylinder 30.
  • a ring 33 guides the cylinder 30.
  • References 34 and 35 designate pressure balancing holes.
  • the insulating part 16 and the fingers 15 define a thermal volume 36 opening onto the area where an arc forms when the circuit breaker opens.
  • the thermal volume 36 is closed by the tubular end portion of the movable part 40 constituting the movable arcing contact.
  • the thermal volume 36 remains closed by means of a socket 37 pushed by a spring 38.
  • the socket 37 has an end 37A of insulating material.
  • the tube 40 constituting the movable arcing contact is terminated by a tip 40A of alloy resistant to wear due to the arcing.
  • the movable part of the switching chamber carries a set of permanent contact fingers 41, cooperating with contact 4.
  • the fingers 41 are protected by a scent-proof cover 42 also serving as a pusher for the tube 26.
  • the mobile assembly is connected by sliding contacts not shown to an outlet not shown.
  • the circuit breaker works as follows.
  • FIG. 3A Reference is made to FIG. 3A.
  • the arc A1 which gushes out, during the separation of the arcing contacts, between the fingers 15 and the electrode 17, produces in the thermal chamber 36 an increase in pressure insufficient to move the valve 21.
  • Arc A2 which is established between electrode 17 and movable arc contact 40 is cut off by the jet of compressed gas coming from blowing volume 25 and which passes through passage 20.
  • FIG. 3B Reference is made to FIG. 3B.
  • the pressure generated by the arc A1 is so high that it succeeds in overcoming the pressure of the spring 22 and the back pressure of the volume 25.
  • the valve 21 opens under the action of the gas contained in the channels 8 and which are pushed by the pressure generated in the volume 36.
  • the gas of the channels 8 is fresh thanks to the volume of gas 7 which isolates the gas from the channels of the thermal chamber 36.
  • the gas from the channels 8 flows through the blowing nozzle 20 and comes to cut the arc A2.
  • the fresh compressed gas in volume 25 can then escape through passages 24 and 20, and ensure the dielectric strength of the device.
  • the invention thus makes it possible to use the thermal energy of the arc under the best conditions.
  • the invention applies to high voltage circuit breakers.

Landscapes

  • Circuit Breakers (AREA)

Description

La présente invention concerne un disjoncteur à gaz diélectrique sous pression, du type comprenant une chambre de soufflage et un volume thermique. Dans ce type d'appareil, la chambre de soufflage comprend des moyens tels que cylindre et piston pour comprimer le gaz au moment de la manoeuvre d'ouverture et le diriger, à travers une buse de soufflage sur l'arc à couper, comme cela est par exemple connu selon le document FR-A-2 356 258.The present invention relates to a pressurized dielectric gas circuit breaker, of the type comprising a blowing chamber and a thermal volume. In this type of device, the blowing chamber comprises means such as a cylinder and piston to compress the gas during the opening operation and direct it, through a blowing nozzle, on the arc to be cut, like this. is for example known according to document FR-A-2 356 258.

Par volume thermique, on désigne un volume s'ouvrant sur une zone proche de celle où se forme l'arc au moment de l'ouverture du disjoncteur.The term “thermal volume” denotes a volume opening onto an area close to that where the arc is formed when the circuit breaker opens.

Le gaz de ce volume est échauffé par l'arc et sa pression augmente.The gas of this volume is heated by the arc and its pressure increases.

L'énergie ainsi accumulée est généralement utilisée pour contribuer au soufflage de l'arc et/ou constituer un appoint d'énergie pour la manoeuvre du disjoncteur.The energy thus accumulated is generally used to contribute to the blowing of the arc and / or constitute an additional energy for the operation of the circuit breaker.

Dans le cas où le courant à couper est faible (courant nominal ou inférieur), l'arc est faible et le volume thermique joue un rôle négligeable dans la coupure de l'arc qui doit alors être assurée par la chambre de soufflage.In the case where the current to be cut is low (nominal current or lower), the arc is low and the thermal volume plays a negligible role in breaking the arc which must then be ensured by the blowing chamber.

Si au contraire le courant à couper est élevé (courant de court-circuit), l'arc est important et l'énergie accumulée dans le volume thermique est importante.If on the contrary the current to be cut is high (short-circuit current), the arc is important and the energy accumulated in the thermal volume is important.

Dans certains dispositifs de type connu, le gaz échauffé par l'arc est envoyé directement sur l'arc à couper. Or, ce gaz n'a pas toutes les qualités diélectriques requises pour une parfaite coupure de l'arc, en raison des impuretés qu'il contient et de l'ionisation de certaines de ses molécules.In certain devices of known type, the gas heated by the arc is sent directly to the arc to be cut. However, this gas does not have all the dielectric qualities required for perfect arc cutting, due to the impurities it contains and the ionization of some of its molecules.

Un but de l'invention est d'utiliser l'énergie de l'arc pour envoyer un jet de gaz frais sur l'arc et non un gaz chaud et pollué.An object of the invention is to use the energy of the arc to send a jet of fresh gas onto the arc and not a hot and polluted gas.

On a parfois utilisé le gaz chauffé par l'arc pour pousser du gaz frais sur l'arc au moyen d'un piston. Un but de l'invention est de pousser du gaz frais sans moyens mécaniques.Gas heated by the arc has sometimes been used to push fresh gas onto the arc with a piston. An object of the invention is to push fresh gas without mechanical means.

L'invention a pour objet un disjoncteur à haute tension à gaz diélectrique sous pression du type comprenant:

  • - un ensemble fixe comprenant des contacts principaux et des contacts d'arc,
  • - un ensemble mobile comprenant des contacts principaux et des contacts d'arc,
  • - une chambre de soufflage comprenant un piston se déplaçant à la séparation des contacts et poussant du gaz comprimé de soufflage par une buse sur la zone où se forme l'arc et
  • - un volume thermique caractérisé en ce que le volume thermique est en communication avec la partie aval de la buse de soufflage par des canaux et passages allongeant le chemin entre le volume thermique et ladite buse, ladite communication étant obturée par un clapet calibré qui ne s'ouvre que lorsque la pression dans lesdits canaux et passages atteint une valeur de seuil, ledit clapet obturant, lorsque ladite communication est ouverte, le passage entre la chambre de soufflage et la buse.
The subject of the invention is a high-voltage circuit breaker with pressurized dielectric gas of the type comprising:
  • - a fixed assembly comprising main contacts and arcing contacts,
  • - a mobile assembly comprising main contacts and arcing contacts,
  • a blowing chamber comprising a piston moving at the separation of the contacts and pushing compressed blowing gas by a nozzle over the area where the arc is formed, and
  • - A thermal volume characterized in that the thermal volume is in communication with the downstream part of the blowing nozzle by channels and passages extending the path between the thermal volume and said nozzle, said communication being closed by a calibrated valve which does not 'opens that when the pressure in said channels and passages reaches a threshold value, said valve closing, when said communication is open, the passage between the blowing chamber and the nozzle.

L'invention est précisée par la description ci-après d'un mode préféré de réalisation de l'invention, en référence au dessin annexé dans lequel:

  • - la figure 1 est une vue partielle schématique en coupe axiale d'une chambre de coupure d'un disjoncteur selon l'invention, en position fermée,
  • - la figure 2 est une vue agrandie d'une partie de la figure 1,
  • -la figure 3A est une vue partielle en coupe axiale de la même chambre au cours de la manoeuvre d'ouverture du disjoncteur pour la coupure d'un courant de faible intensité,
  • -la figure 3B est une vue partielle en coupe axiale de la même chambre au cours de la manoeuvre d'ouverture du disjoncteur pour la coupure d'un courant de forte intensité,
  • - la figure 4 est une vue partielle en coupe axiale de la même chambre en position de fin de course d'ouverture.
The invention is clarified by the following description of a preferred embodiment of the invention, with reference to the accompanying drawing in which:
  • FIG. 1 is a schematic partial view in axial section of a breaking chamber of a circuit breaker according to the invention, in the closed position,
  • FIG. 2 is an enlarged view of part of FIG. 1,
  • FIG. 3A is a partial view in axial section of the same chamber during the opening operation of the circuit breaker for breaking a low current,
  • FIG. 3B is a partial view in axial section of the same chamber during the opening operation of the circuit breaker for breaking a high current,
  • - Figure 4 is a partial view in axial section of the same chamber in the opening end-of-travel position.

Toutes les figures ci-après sont des vues en coupe passant par l'axe XX' du disjoncteur, toutes les pièces représentées sont de révolution autour de cet axe.All the figures below are sectional views passing through the axis XX 'of the circuit breaker, all the parts shown are of revolution around this axis.

Le disjoncteur comprend une enveloppe isolante 1 et contient un gaz diélectrique tel que l'hexafluorure de soufre sous une pression de quelques bars.The circuit breaker comprises an insulating envelope 1 and contains a dielectric gas such as sulfur hexafluoride under a pressure of a few bars.

La chambre de coupure comprend un ensemble fixe et un ensemble mobile. L'ensemble fixe comprend un bloc métallique 2 relié à une prise de courant non représentée; sur le bloc 2 est fixée une pièce 3 comprenant une partie tubulaire 3A à l'extrémité de laquelle est disposée une couronne 4 constituant le contact principal fixe du disjoncteur.The breaking chamber comprises a fixed assembly and a mobile assembly. The fixed assembly comprises a metal block 2 connected to an outlet not shown; on the block 2 is fixed a part 3 comprising a tubular part 3A at the end of which is arranged a ring 4 constituting the fixed main contact of the circuit breaker.

A la pièce 3 estfixée une pièce cylindrique 6 dans l'épaisseur de laquelle sont pratiqués des canaux tels que 7 qui la traversent parallélement à son axe.To the part 3 is fixed a cylindrical part 6 in the thickness of which are formed channels such as 7 which pass through it parallel to its axis.

On désigne par 8 le volume annulaire compris entre les cylindres 6 et3A. Les canaux? communiquent avec le volume 8 par un volume annulaire 9 ménagé entre les pièces 3 et 6.The annular volume between the cylinders 6 and 3A is designated by 8. Canals? communicate with the volume 8 by an annular volume 9 formed between the parts 3 and 6.

A l'extrémité du tube 6, et du côté intérieur, est fixée une pièce tubulaire 14 sur laquelle est assujettie une couronne de doigts de contact d'arc 15.At the end of the tube 6, and on the interior side, is fixed a tubular part 14 to which is subjected a ring of arcing contact fingers 15.

A l'extrémité du tube 6, du côté extérieur, est disposé un embout 16 isolant terminé par une électrode annulaire 17 à potentiel flottant.At the end of the tube 6, on the outside, is disposed an insulating tip 16 terminated by an annular electrode 17 with floating potential.

Le contact principal fixe est prolongé par une buse isolante 19 définissant avec l'embout isolant 16 un passage 20.The fixed main contact is extended by an insulating nozzle 19 defining with the insulating nozzle 16 a passage 20.

Le passage 20 communique avec le passage 8 par l'intermédiaire d'un clapet mobile 21, venant en contact sous l'action d'un ressort 22 avec un redan 6A du tube 6.The passage 20 communicates with the passage 8 by means of a movable valve 21, coming into contact under the action of a spring 22 with a step 6A of the tube 6.

En régime permanent, que le disjoncteur soit ouvert ou fermé, la communication entre le passage 8 et le passage 20 est fermée par le clapet 21.In steady state, whether the circuit breaker is open or closed, the communication between passage 8 and passage 20 is closed by the valve 21.

Le passage 20 communique également, par un passage 24, avec un volume de soufflage 25 délimité par un cylindre isolant 26, un piston semi-mobile 27 et une couronne 3B faisant partie de la pièce 3.The passage 20 also communicates, by a passage 24, with a blowing volume 25 delimited by an insulating cylinder 26, a semi-mobile piston 27 and a crown 3B forming part of the part 3.

Le piston se déplace sous l'action d'un ressort 28 disposé dans un logement tubulaire 29.The piston moves under the action of a spring 28 arranged in a tubular housing 29.

Le piston est prolongé par un cylindre de guidage 30.The piston is extended by a guide cylinder 30.

Des joints 31 et 32 assurent l'étanchéité du volume 25.Seals 31 and 32 seal the volume 25.

Une bague 33 assure le guidage du cylindre 30.A ring 33 guides the cylinder 30.

Les références 34 et 35 désignent des trous d'équilibrage de pression.References 34 and 35 designate pressure balancing holes.

La pièce isolante 16 et les doigt 15 définissent un volume thermique 36 débouchant sur la zone où se forme un arc lors de l'ouverture du disjoncteur. Lorsque le disjoncteur est en position fermée le volume thermique 36 est fermé par la partie terminale tubulaire de la pièce mobile 40 constituant le contact d'arc mobile.The insulating part 16 and the fingers 15 define a thermal volume 36 opening onto the area where an arc forms when the circuit breaker opens. When the circuit breaker is in the closed position, the thermal volume 36 is closed by the tubular end portion of the movable part 40 constituting the movable arcing contact.

Lorsque le disjoncteur s'ouvre le volume thermique 36 reste fermé grâce à une douille 37 poussée par un ressort 38.When the circuit breaker opens, the thermal volume 36 remains closed by means of a socket 37 pushed by a spring 38.

La douille 37 possède une extrémité 37A en matériau isolant.The socket 37 has an end 37A of insulating material.

Le tube 40 constituant le contact d'arc mobile est terminée par un embout 40A en alliage résistant à l'usure due à l'arc.The tube 40 constituting the movable arcing contact is terminated by a tip 40A of alloy resistant to wear due to the arcing.

La partie mobile de la chambre de coupure porte un jeu de doigts de contacts permanents 41, coopérant avec le contact 4.The movable part of the switching chamber carries a set of permanent contact fingers 41, cooperating with contact 4.

Les doigts 41 sont protégés par un capot 42 pare-effluves servant également de poussoir pour le tube 26.The fingers 41 are protected by a scent-proof cover 42 also serving as a pusher for the tube 26.

L'ensemble mobile est relié par des contacts glissants non représentés à une prise de courant non représentée.The mobile assembly is connected by sliding contacts not shown to an outlet not shown.

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

Lorsque le disjoncteur est fermé (figure 1) le courant passe par le bloc 2, le cylindre 3, le contact 4, les doigts 41 et la pièce mobile 40.When the circuit breaker is closed (FIG. 1) the current flows through the block 2, the cylinder 3, the contact 4, the fingers 41 and the moving part 40.

Coupure de courant de faible intensitéLow intensity power outage (courant nominal ou courant capacitif)(nominal current or capacitive current)

On se référera à la figure 3A.Reference is made to FIG. 3A.

L'arc A1 qui jaillit, lors de la séparation des contacts d'arc, entre les doigts 15 et l'électrode 17, produit dans la chambre thermique 36 une augmentation de pression insuffisante pour déplacer le clapet 21.The arc A1 which gushes out, during the separation of the arcing contacts, between the fingers 15 and the electrode 17, produces in the thermal chamber 36 an increase in pressure insufficient to move the valve 21.

La coupure de l'arc A2 qui s'établit entre l'électrode 17 et le contact d'arc mobile 40 est assurée par le jet de gaz comprimé provenant du volume de soufflage 25 et qui traverse le passage 20.Arc A2 which is established between electrode 17 and movable arc contact 40 is cut off by the jet of compressed gas coming from blowing volume 25 and which passes through passage 20.

Coupure des courants de forte intensité (courants de court-circuit)Interruption of high-intensity currents (short-circuit currents)

On se référera à la figure 3B.Reference is made to FIG. 3B.

La pression engendrée par l'arc A1 est si élevée qu'elle réussit à vaincre la pression du ressort 22 et la contre-pression du volume 25.The pressure generated by the arc A1 is so high that it succeeds in overcoming the pressure of the spring 22 and the back pressure of the volume 25.

Le clapet 21 s'ouvre sous l'action du gaz contenu dans les canaux 8 et qui sont poussés par la pression engendrée dans le volume 36. Le gaz des canaux 8 est frais grâce au volume de gaz 7 qui isole le gaz des canaux de la chambre thermique 36.The valve 21 opens under the action of the gas contained in the channels 8 and which are pushed by the pressure generated in the volume 36. The gas of the channels 8 is fresh thanks to the volume of gas 7 which isolates the gas from the channels of the thermal chamber 36.

Le gaz des canaux 8 s'écoule par la buse de soufflage 20 et vient couper l'arc A2.The gas from the channels 8 flows through the blowing nozzle 20 and comes to cut the arc A2.

Aussitôt l'arc A1 s'éteint, la pression de la chambre 36 diminue brusquement entraînant la fermeture du clapet 21.As soon as the arc A1 goes out, the pressure of the chamber 36 abruptly decreases, causing the valve 21 to close.

Le gaz comprimé frais du volume 25 peut alors s'échapper par les passages 24 et 20, et assurer la tenue diélectrique de l'appareil.The fresh compressed gas in volume 25 can then escape through passages 24 and 20, and ensure the dielectric strength of the device.

L'invention permet ainsi d'utiliser l'énergie thermique de l'arc dans les meilleures conditions.The invention thus makes it possible to use the thermal energy of the arc under the best conditions.

L'invention s'applique aux disjoncteurs à haute tension.The invention applies to high voltage circuit breakers.

Claims (3)

1. A compressed dielectric gas high-voltage circuit breaker comprising:
- a fixed assembly (3, 6) comprising main contacts (4) and arcing contacts (15),
- a moving assembly comprising main contacts (41) and arcing contacts (40A),
- a blast chamber (25) comprising a piston (27) which moves on separation of the contacts to urge compressed blast gas towards a blast nozzle (19) situated in the zone where an arc is struck, and
- a thermal volume,
characterized in that the thermal volume (36) is in communication with the downstream portion of the blast nozzle (19) via channels (7) and passages (8, 9) extending the path between the thermal volume and said nozzle (19), said communication being closed by a calibrated non-return valve (21) which opens only when the pressure in said channels (7) and in said passages (8, 9) reaches a threshold value, said non-return valve (21) closing the passage (24) between the blast chamber (25) and the nozzle when said communication is opened.
2. A circuit breaker according to claim 1, characterized in that it includes an annular electrode (17) disposed between the throat of the nozzle (19) and the end of the fixed arcing contacts (15).
3. A circuit breaker according to one of claims 1 and 2, characterized in that it includes a semi-moving insulating sleeve (37) for closing the thermal volume (36) after the arcing contacts (15, 40) have separated.
EP87104480A 1986-04-01 1987-03-26 High-tension gas blast circuit breaker Expired - Lifetime EP0239932B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8604606A FR2596574B1 (en) 1986-04-01 1986-04-01 HIGH VOLTAGE CIRCUIT BREAKER WITH DIELECTRIC GAS UNDER PRESSURE
FR8604606 1986-04-01

Publications (2)

Publication Number Publication Date
EP0239932A1 EP0239932A1 (en) 1987-10-07
EP0239932B1 true EP0239932B1 (en) 1991-01-16

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Application Number Title Priority Date Filing Date
EP87104480A Expired - Lifetime EP0239932B1 (en) 1986-04-01 1987-03-26 High-tension gas blast circuit breaker

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US (1) US4754109A (en)
EP (1) EP0239932B1 (en)
JP (1) JP2514030B2 (en)
CN (1) CN1005942B (en)
BR (1) BR8701457A (en)
DE (1) DE3767340D1 (en)
DK (1) DK168777B1 (en)
ES (1) ES2019593B3 (en)
FR (1) FR2596574B1 (en)
GR (1) GR3001705T3 (en)
IE (1) IE60331B1 (en)
PT (1) PT84595B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2641409B1 (en) * 1989-01-02 1996-04-26 Alsthom Gec HIGH AND MEDIUM VOLTAGE CIRCUIT BREAKER WITH SUPPLY GAS
FR2646961B1 (en) * 1989-05-11 1994-01-28 Gec Alsthom Sa SELF-BLOWING MEDIUM VOLTAGE CIRCUIT BREAKER
FR2647255B1 (en) * 1989-05-17 1993-04-23 Alsthom Gec HIGH VOLTAGE CIRCUIT BREAKER WITH BLOWING DIELECTRIC GAS
JPH04284319A (en) * 1991-03-13 1992-10-08 Hitachi Ltd Gas-blast circuit breaker
FR2766609B1 (en) * 1997-07-24 1999-09-24 Gec Alsthom T & D Sa GAS SWITCH WITH COMPRESSIBLE THERMAL EXPANSION VOLUME
GB2332566B (en) * 1997-12-19 2001-09-19 Rolls Royce Power Eng Electrical circuit breaker
JP4855825B2 (en) * 2006-04-27 2012-01-18 株式会社東芝 Puffer type gas circuit breaker
EP2415060B1 (en) 2009-03-30 2017-07-26 ABB Research Ltd. Circuit breaker
FR2949170B1 (en) * 2009-08-14 2011-11-25 Areva T & D Sas BREAKER CHAMBER FOR A MEDIUM OR HIGH VOLTAGE CIRCUIT BREAKER WITH REDUCED MANEUVER POWER
JP5482613B2 (en) * 2010-10-05 2014-05-07 株式会社日立製作所 Gas circuit breaker
CN102945768B (en) * 2012-11-07 2015-04-22 中国西电电气股份有限公司 Arc-control device of breaker
CN104299841B (en) * 2014-04-25 2016-11-23 国家电网公司 Arc-chutes and use the chopper of this mechanism
EP3407370B1 (en) * 2017-05-24 2020-04-01 General Electric Technology GmbH A gas blast switch comprising an optimized gas storage chamber

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FR2356258A1 (en) * 1976-06-24 1978-01-20 Sprecher & Schuh Ag Compressed gas circuit breaker - has sprung free piston slidable on separator and facing fixed contact close to nozzle

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FR2575596B1 (en) * 1985-01-02 1987-01-30 Alsthom Atlantique COMPRESSED GAS CIRCUIT BREAKER WITH DOUBLE THERMODYNAMIC CUT AND A PLURALITY OF BLOWING DIRECTIONS
FR2576143B1 (en) * 1985-01-16 1987-12-24 Alsthom Atlantique HIGH-VOLTAGE, COMPRESSED GAS, CIRCUIT BREAKER ASSISTED BY THE ARC THERMAL EFFECT AND WITH DOUBLE MOTION
FR2576142B1 (en) * 1985-01-16 1987-12-24 Alsthom Atlantique HIGH VOLTAGE CIRCUIT BREAKER, COMPRESSED GAS, HANDLING ENERGY ASSISTED BY THE ARC THERMAL EFFECT
FR2576144B1 (en) * 1985-01-16 1987-02-06 Alsthom Atlantique HIGH VOLTAGE, COMPRESSED GAS, LOW-ENERGY CIRCUIT BREAKER

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FR2356258A1 (en) * 1976-06-24 1978-01-20 Sprecher & Schuh Ag Compressed gas circuit breaker - has sprung free piston slidable on separator and facing fixed contact close to nozzle

Also Published As

Publication number Publication date
JP2514030B2 (en) 1996-07-10
CN1005942B (en) 1989-11-29
DK168777B1 (en) 1994-06-06
DK163087D0 (en) 1987-03-31
CN87102445A (en) 1987-10-14
ES2019593B3 (en) 1991-07-01
IE870832L (en) 1987-10-01
US4754109A (en) 1988-06-28
IE60331B1 (en) 1994-06-29
FR2596574B1 (en) 1988-05-20
BR8701457A (en) 1988-01-05
DE3767340D1 (en) 1991-02-21
GR3001705T3 (en) 1992-11-23
EP0239932A1 (en) 1987-10-07
PT84595B (en) 1989-11-30
FR2596574A1 (en) 1987-10-02
PT84595A (en) 1987-04-01
DK163087A (en) 1987-10-02
JPS62237626A (en) 1987-10-17

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