EP0380907B2 - High and medium voltage gas blast circuit breaker - Google Patents

High and medium voltage gas blast circuit breaker Download PDF

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Publication number
EP0380907B2
EP0380907B2 EP90100019A EP90100019A EP0380907B2 EP 0380907 B2 EP0380907 B2 EP 0380907B2 EP 90100019 A EP90100019 A EP 90100019A EP 90100019 A EP90100019 A EP 90100019A EP 0380907 B2 EP0380907 B2 EP 0380907B2
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EP
European Patent Office
Prior art keywords
piston
circuit breaker
tube
arc
cylinder
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
EP90100019A
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German (de)
French (fr)
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EP0380907A1 (en
EP0380907B1 (en
Inventor
Edmund Thuries
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Alstom Holdings SA
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GEC Alsthom SA
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Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Priority to AT90100019T priority Critical patent/ATE102741T1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—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
    • H01H33/903—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 and assisting the operating mechanism
    • 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 high voltage circuit breaker of the dielectric gas type, such as sulfur hexafluoride, under a pressure of a few bars.
  • the invention relates more particularly to a circuit breaker of the aforementioned type in which the increase in pressure due, at the time of tripping, to the appearance of an electric arc between the arcing contacts, is used to exert a motor force on the moving part; this arrangement, known for example from French patent 85 00610 filed on January 16, 1985 and published on July 18, 1986 under the number 2 576 142, makes it possible to cut the arc without requiring the use of a device too much power.
  • Document DE-A-3 132 825 describes a circuit breaker in accordance with the preamble of claim 1.
  • the second end of the metal tube coaxial with the circuit breaker is connected to said operating member, said second piston is an annular piston external to said tube and integral with said tube, said means of communication with low pressure drops being constituted by said tube pierced with large openings at its periphery, the interior of said tube being closed substantially to the right of said piston by a part.
  • the circuit breaker shown in partial view in FIG. 1 comprises a casing 1, of insulating material such as ceramic, of generally cylindrical shape with axis XX and delimiting an interior volume Vo filled with dielectric gas such as sulfur hexafluoride, under a pressure of a few bars.
  • insulating material such as ceramic
  • dielectric gas such as sulfur hexafluoride
  • the circuit breaker comprises a fixed main contact 2 connected to a first socket not shown, and a fixed arcing contact 3, having one end 3A made of an alloy resistant to the effects of the arc, such as a tungsten alloy.
  • the moving element of the circuit breaker comprises a tube 4, one end of which 4A, made of an arc-resistant alloy, constitutes the moving arcing contact.
  • the tube 4 is connected, at its other end 4B, to an operating device, not shown.
  • the tube 4 is integral with a tube 5, one end of which 5A constitutes the movable main contact of the circuit breaker.
  • an insulating nozzle 6 At the end 5A is fixed an insulating nozzle 6, the neck of which is obstructed by the arcing contact 4 when the circuit breaker is in the closed position.
  • Holes 7 are made in the crown connecting the tubes 4 and 5 so that these tubes define a single volume V1, closed on one side by the nozzle 6.
  • the part 8 is connected to a second outlet not shown.
  • the tube 5 which constitutes the blowing cylinder of the circuit breaker, is integral with a piston 14 placed inside the tube 88 and capable of sliding in this tube in leaktight manner thanks to a seal 14D.
  • the piston 14 defines with the tubes 8A and 8B a volume V2.
  • the piston has openings 14A which can be closed by an annular valve 16, the stroke of which is limited by a projection 14B.
  • the tube 4 is pierced with very large openings 15 on its surface putting in communication by large passages the volume V2 with the volume V3 inside the tube 4. It is noted that the volume V3 is closed, on the operating member side by a disc 17 integral of tube 4.
  • the circuit breaker works as follows:
  • the circuit breaker operating device drives the moving assembly (tubes 4 and 5, nozzle 6, piston 14) to the right of the figure.
  • the main contacts separate and the current then flows through the arcing contacts 3 and 4.
  • an arc 20 (fig.2) is formed; it strongly heats the surrounding gas and the pressure increases strongly.
  • the volume V1 is closed by application of the valve 13.
  • the hot gas escapes through the volume V3 surrounding the axis and passes through the openings 15 in the volume V2.
  • the pressure prevailing in the volume V1 produces at the first zero crossing of the current an expansion of gas through the nozzle 6, which produces the extinction of the arc.
  • the pressure in the volume V1 is sufficient to press the valve 13 against its seat; the expansion of volume V1 at zero current crossing is enough to cut the arc.
  • the operating member moves the moving assembly to the right of the figure.
  • a slight overpressure in the volume V2 causes the valve 16 to close on the one hand, and on the other hand, combined with a slight depression in the volume V1, causes the slide 11 to move to the left.
  • the valve 13 opens, which allows filling of the volume V1 without requiring any particular effect due to a significant depression in the volume V1.

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  • Circuit Breakers (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Pens And Brushes (AREA)
  • Organic Insulating Materials (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

High and medium voltage gas-blast circuit-breaker comprising a pressurised dielectric gas-filled cylindrical insulating surround, a main stationary contact (2), a stationary arc contact (3) and a movable gadget connected to an operating member comprising a main moving contact (5A), a moving arc contact (4A) and a blast cylinder (5) associated with a blast nozzle (6) and co-operating with a first piston (13), a second piston (14) integral with the movable gadget and sliding in a second stationary cylinder (8B), characterised in that the second piston (14) has a large cross-section in relation to the cross-section of the blast cylinder, the said second piston being associated with means (15) of low charge loss communication with the arc zone, the said second piston being drilled with calibrated orifices (14C) in order to limit the pressure on that face of the said piston receiving the gases heated by the arc. <??>Applications to high and medium voltage circuit-breakers. <IMAGE>

Description

La présente invention concerne un disjoncteur à haute tension du type à gaz diélectrique, tel que l'hexafluorure de soufre, sous une pression de quelques bars.The present invention relates to a high voltage circuit breaker of the dielectric gas type, such as sulfur hexafluoride, under a pressure of a few bars.

L'invention vise plus particulièrement un disjoncteur du type précité dans lequel l'augmentation de pression due, au moment du déclenchement, à l'apparition d'un arc électrique entre les contacts d'arc, est mise à profit pour exercer un effort moteur sur l'équipage mobile ; cette disposition, connue par exemple par le brevet français 85 00610 déposé le 16 janvier 1985 et publié le 18 juillet 1986 sous le n° 2 576 142, permet d'assurer la coupure de l'arc sans nécessiter l'emploi d'un dispositif de manoeuvre de puissance trop importante.The invention relates more particularly to a circuit breaker of the aforementioned type in which the increase in pressure due, at the time of tripping, to the appearance of an electric arc between the arcing contacts, is used to exert a motor force on the moving part; this arrangement, known for example from French patent 85 00610 filed on January 16, 1985 and published on July 18, 1986 under the number 2 576 142, makes it possible to cut the arc without requiring the use of a device too much power.

Dans ces disjoncteurs dits à faible énergie de manoeuvre, l'augmentation de pression qui naît au voisinage de l'arc se propage jusqu'à un piston lié à l'équipage mobile.In these so-called low operating energy circuit breakers, the pressure increase which arises in the vicinity of the arc propagates to a piston linked to the moving element.

La facilité et la rapidité avec lesquelles se propage la pression dépendent d'une part des obstacles mis au passage du gaz entre la zone d'arc et le piston. d'autre part à l'évolution du gradient de pression entre la zone d'arc et la face du piston.The ease and rapidity with which the pressure propagates depends on the one hand on the obstacles placed in the passage of the gas between the arc zone and the piston. on the other hand to the evolution of the pressure gradient between the arc zone and the face of the piston.

Dans les dispositifs connus comme par exemple dans la demande de brevet allemand publiée DE 31 32825 A1 ou dans le brevet américain 2 957 063, le gaz se propage dans des conduits dont la section étroite n'est pas favorable à un écoulement rapide ; par ailleurs, le gradient de pression entre la zone d'arc et la face du piston diminue très vite, de sorte que l'action mécanique du gaz est très vite ralentie après l'apparition de l'arc.In the known devices such as for example in the German patent application published DE 31 32825 A1 or in the American patent 2 957 063, the gas propagates in conduits whose narrow section is not favorable to a rapid flow; moreover, the pressure gradient between the arc zone and the face of the piston decreases very quickly, so that the mechanical action of the gas is very quickly slowed down after the appearance of the arc.

Le document DE-A-3 132 825 décrit un disjoncteur conforme au préambule de la revendication 1.Document DE-A-3 132 825 describes a circuit breaker in accordance with the preamble of claim 1.

Un but de l'invention est de réaliser un disjoncteur dans lequel la pression est rapidement transmise au piston lié à l'organe de manoeuvre et dans lequel l'écoulement du gaz depuis la zone d'arc s'effectue rapidement et sans perturbation.An object of the invention is to provide a circuit breaker in which the pressure is rapidly transmitted to the piston linked to the operating member and in which the flow of gas from the arc zone takes place quickly and without disturbance.

L'invention a pour objet un disjoncteur à haute tension à gaz de soufflage tel que défini à la revendication 1.The subject of the invention is a blast gas high voltage circuit breaker as defined in claim 1.

Dans un mode préféré de réalisation la seconde extrémité du tube métallique coaxial au disjoncteur est reliée audit organe de manoeuvre, ledit second piston est un piston annulaire extérieur audit tube et solidaire de celui-ci, lesdits moyens de mise en communication à faibles pertes de charge étant constitués par ledit tube percé de larges ouvertures à sa périphérie, l'intérieur dudit tube étant fermé sensiblement au droit dudit piston par une pièce.In a preferred embodiment, the second end of the metal tube coaxial with the circuit breaker is connected to said operating member, said second piston is an annular piston external to said tube and integral with said tube, said means of communication with low pressure drops being constituted by said tube pierced with large openings at its periphery, the interior of said tube being closed substantially to the right of said piston by a part.

L'invention est expliquée maintenant en référence au dessin annexé dans lequel :

  • la figure 1 est une vue partielle en demi-coupe axiale d'un disjoncteur selon l'invention, représenté en position fermée,
  • la figure 2 est une vue partielle en demi-coupe axiale du même disjoncteur, représenté en cours d'ouvertures (déclenchement),
  • la figure 3 est une vue partielle en demi-coupe axiale du même disjoncteur, en cours de fermeture (enclenchement).
The invention is now explained with reference to the appended drawing in which:
  • FIG. 1 is a partial view in axial half-section of a circuit breaker according to the invention, shown in the closed position,
  • FIG. 2 is a partial view in axial half-section of the same circuit breaker, shown during openings (tripping),
  • Figure 3 is a partial view in axial half-section of the same circuit breaker, during closing (latching).

Le disjoncteur représenté en vue partielle dans la figure 1, comporte une enveloppe 1, en matériau isolant tel que la céramique, de forme générale cylindrique d'axe XX et délimitant un volume intérieur Vo rempli de gaz diélectrique tel que l'hexafluorure de soufre, sous une pression de quelques bars.The circuit breaker shown in partial view in FIG. 1 comprises a casing 1, of insulating material such as ceramic, of generally cylindrical shape with axis XX and delimiting an interior volume Vo filled with dielectric gas such as sulfur hexafluoride, under a pressure of a few bars.

Le disjoncteur comprend un contact principal fixe 2 relié à une première prise de courant non représentée, et un contact d'arc fixe 3, ayant une extrémité 3A réalisée en alliage résistant aux effets de l'arc, tel qu'un alliage de tungstène.The circuit breaker comprises a fixed main contact 2 connected to a first socket not shown, and a fixed arcing contact 3, having one end 3A made of an alloy resistant to the effects of the arc, such as a tungsten alloy.

L'équipage mobile du disjoncteur comprend un tube 4, dont une extrémité 4A, en alliage résistant à l'arc, constitue le contact d'arc mobile. Le tube 4 est relié, à son autre extrémité 4B, à un dispositif de manoeuvre non représenté. Le tube 4 est solidaire d'un tube 5 dont une extrémité 5A constitue le contact principal mobile de disjoncteur.The moving element of the circuit breaker comprises a tube 4, one end of which 4A, made of an arc-resistant alloy, constitutes the moving arcing contact. The tube 4 is connected, at its other end 4B, to an operating device, not shown. The tube 4 is integral with a tube 5, one end of which 5A constitutes the movable main contact of the circuit breaker.

A l'extrémité 5A est fixée une buse isolante 6 dont le col est obstrué par le contact d'arc 4 lorsque le disjoncteur est en position fermée.At the end 5A is fixed an insulating nozzle 6, the neck of which is obstructed by the arcing contact 4 when the circuit breaker is in the closed position.

Des trous 7 sont pratiqués dans la couronne reliant les tubes 4 et 5 de telle sorte que ces tubes définissent un seul et même volume V1, fermé d'un côté par la buse 6.Holes 7 are made in the crown connecting the tubes 4 and 5 so that these tubes define a single volume V1, closed on one side by the nozzle 6.

Le tube 5 est guidé par une première partie tubulaire 8A d'une pièce métallique fixe 8 ayant une seconde partie tubulaire 8B de diamètre bien supérieur à celui de la partie 8A.The tube 5 is guided by a first tubular part 8A of a fixed metal part 8 having a second tubular part 8B of diameter much greater than that of the part 8A.

La pièce 8 est reliée à une seconde prise de courant non représentée.The part 8 is connected to a second outlet not shown.

Le tube 5 porte un contact électrique glissant 5C coopérant avec le tube 8A.The tube 5 carries a sliding electrical contact 5C cooperating with the tube 8A.

En position enclenchée du disjoncteur le courant circule par les pièces 2, 5, 8. Un joint 9 assure l'étanchéité entre tube 5 et tube 8A.In the switched-on position of the circuit breaker, the current flows through the parts 2, 5, 8. A seal 9 seals between tube 5 and tube 8A.

La liaison entre les tubes 8A et 8B se fait par une portion massive de la pièce 8 dans laquelle sont pratiquées des ouvertures en forme de cheminées radiales 10. Ces cheminées sont normalement fermées par un coulisseau 11 dont une extrémité annulaire 11A coopère avec un joint circulaire 8C à la base des cheminées. L'extrémité 11A sert également à limiter la course du coulisseau en venant en butée sur la base des cheminées à l'opposé du joint 8C. Le coulisseau 11 a la forme générale d'un tube ; il est solidaire d'une portion tubulaire 11B pouvant glisser sur le tube 4 qui lui sert de guide.The connection between the tubes 8A and 8B is made by a massive portion of the part 8 in which are made openings in the form of radial chimneys 10. These chimneys are normally closed by a slide 11 of which an annular end 11A cooperates with a circular joint 8C at the base of the chimneys. The end 11A also serves to limit the stroke of the slide coming into abutment on the base of the chimneys opposite the joint 8C. The slide 11 has the form general of a tube; it is integral with a tubular portion 11B which can slide on the tube 4 which serves as a guide.

Une étanchéité est assurée par un joint 12. Le coulisseau 11 est également guidé par la pièce fixe 8A qui présente un bossage 8D approprié.A seal is ensured by a seal 12. The slide 11 is also guided by the fixed part 8A which has an appropriate boss 8D.

L'espace annulaire entre les tubes 11 et 11B peut être fermé par un clapet annulaire 13 dont la course est limitée par un ressaut 11C de la pièce 11B.The annular space between the tubes 11 and 11B can be closed by an annular valve 13 whose stroke is limited by a projection 11C of the part 11B.

Le tube 5, qui constitue le cylindre de soufflage du disjoncteur, est solidaire d'un piston 14 placé à l'intérieur du tube 88 et pouvant coulisser dans ce tube de manière étanche grâce à un joint 14D. Le piston 14 délimite avec les tubes 8A et 8B un volume V2. Le piston possède des ouvertures 14A pouvant être fermées par un clapet annulaire 16, dont la course est limité par un ressaut 14B.The tube 5, which constitutes the blowing cylinder of the circuit breaker, is integral with a piston 14 placed inside the tube 88 and capable of sliding in this tube in leaktight manner thanks to a seal 14D. The piston 14 defines with the tubes 8A and 8B a volume V2. The piston has openings 14A which can be closed by an annular valve 16, the stroke of which is limited by a projection 14B.

Selon une caractéristique fondamentale de l'invention, la section du piston est grande vis-à-vis de la section du cylindre de soufflage, par exemple le rapport des diamètres est au moins égal à 2.According to a fundamental characteristic of the invention, the cross section of the piston is large with respect to the cross section of the blowing cylinder, for example the diameter ratio is at least equal to 2.

Le piston 14 possède également des ouvertures calibrées 14C dont le rôle sera expliqué plus loin.The piston 14 also has calibrated openings 14C whose role will be explained below.

Le tube 4 est percé de très larges ouvertures 15 sur sa surface mettant en communication par de vastes passages le volume V2 avec le volume V3 intérieur au tube 4. On note que le volume V3 est fermé, côté organe de manoeuvre par un disque 17 solidaire du tube 4.The tube 4 is pierced with very large openings 15 on its surface putting in communication by large passages the volume V2 with the volume V3 inside the tube 4. It is noted that the volume V3 is closed, on the operating member side by a disc 17 integral of tube 4.

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

1) Coupure des courants de forte intensité (courts-circuits)1) Cutting of high intensity currents (short circuits)

A la détection du court-circuit, le dispositif de manoeuvre du disjoncteur entraîne l'équipage mobile (tubes 4 et 5, buse 6, piston 14) vers la droite de la figure.Upon detection of the short circuit, the circuit breaker operating device drives the moving assembly (tubes 4 and 5, nozzle 6, piston 14) to the right of the figure.

Les contacts principaux se séparent et le courant traverse alors les contacts d'arc 3 et 4.The main contacts separate and the current then flows through the arcing contacts 3 and 4.

A la séparation des contacts d'arc, un arc 20 (fig.2) se forme ; il échauffe fortement le gaz environnant et la pression croît fortement. Le volume V1 se ferme par application du clapet 13. Le gaz chaud s'échappe par le volume V3 entourant l'axe et passe par les ouvertures 15 dans le volume V2.When the arcing contacts are separated, an arc 20 (fig.2) is formed; it strongly heats the surrounding gas and the pressure increases strongly. The volume V1 is closed by application of the valve 13. The hot gas escapes through the volume V3 surrounding the axis and passes through the openings 15 in the volume V2.

La surface du piston étant très grande, la force exercée sur ce dernier, qui aide à la manoeuvre d'ouverture est importante.The surface of the piston being very large, the force exerted on the latter, which helps in the opening maneuver is important.

L'écoulement du gaz chaud provenant de la zone d'arc est facilité :

  • a) par les grandes ouvertures 15 qui réduisent à néant les pertes de charge
  • b) par les orifices calibrés 14C qui limitent la valeur de la pression dans le volume V2, assurant ainsi un gradient de pression entre la zone d'arc et la zone du piston 14.
The flow of hot gas from the arc zone is facilitated:
  • a) by the large openings 15 which reduce the pressure losses to zero
  • b) by the calibrated orifices 14C which limit the value of the pressure in the volume V2, thus ensuring a pressure gradient between the arc zone and the zone of the piston 14.

La pression régnant dans le volume V1 produit au premier passage par zéro du courant une détente de gaz à travers la buse 6, qui produit l'extinction de l'arc.The pressure prevailing in the volume V1 produces at the first zero crossing of the current an expansion of gas through the nozzle 6, which produces the extinction of the arc.

2) Coupure des courants de faible intensité (courant nominal, courants capacitifs ou faibles courants inductifs)2) Cutting of low intensity currents (nominal current, capacitive currents or low inductive currents)

A la séparation des contacts d'arc, l'augmentation de pression due à l'arc est insuffisante pour plaquer le clapet 16 sur son siège. Celui-ci reste ouvert, ce qui évite, dans le volume V2, toute dépression que viendrait freiner l'équipage mobile.When the arcing contacts are separated, the increase in pressure due to the arcing is insufficient to press the valve 16 onto its seat. This remains open, which avoids, in volume V2, any depression that would come to brake the moving equipment.

La pression dans le volume V1 est suffisante pour plaquer le clapet 13 contre son siège ; la détente du volume V1 au passage par zéro du courant suffit à couper l'arc.The pressure in the volume V1 is sufficient to press the valve 13 against its seat; the expansion of volume V1 at zero current crossing is enough to cut the arc.

3) Fermeture du disjoncteur (enclenchement)3) Closing the circuit breaker (latching)

On se référera à la figure 3.We will refer to figure 3.

L'organe de manoeuvre déplace l'équipage mobile vers la droite de la figure. Une légère surpression dans le volume V2 provoque d'une part le fermeture du clapet 16, et d'autre part, combinée à une légère dépression dans le volume V1, provoque un déplacement vers la gauche du coulisseau 11.The operating member moves the moving assembly to the right of the figure. A slight overpressure in the volume V2 causes the valve 16 to close on the one hand, and on the other hand, combined with a slight depression in the volume V1, causes the slide 11 to move to the left.

Ce dernier dégage la base des cheminées 10, ce qui permet au gaz du volume V2 de s'échapper vers le volume Vo et d'éviter une perte d'énergie par compression de gaz.The latter clears the base of the chimneys 10, which allows the gas of volume V2 to escape towards the volume Vo and avoid loss of energy by gas compression.

Le clapet 13 s'ouvre, ce qui permet un remplissage du volume V1 sans nécessiter d'effet particulier en raison d'une dépression importante dans le volume V1.The valve 13 opens, which allows filling of the volume V1 without requiring any particular effect due to a significant depression in the volume V1.

Le disjoncteur qui vient d'être décrit présente une énergie de manoeuvre très réduite par rapport aux disjoncteurs de l'art antérieurThe circuit breaker which has just been described has a very reduced operating energy compared to circuit breakers of the prior art

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

Claims (5)

  1. High- or medium-voltage blow gas circuit breaker comprising:
    - a cylindrical electrically insulative casing adapted to be filled with dielectric gas under pressure,
    - a stationary main contact (2),
    - a stationary arc contact (4),
    - a mobile assembly coupled to an operating member and comprising:
    - a mobile main contact (5A),
    - a blow-out cylinder (5) associated with a blow-out nozzle (6) and cooperating with a first piston (13),
    - a second piston (14) fastened to the mobile assembly, sliding in a stationary second cylinder (8B) which is fastened to the first piston (13) by a tubular part (8A), and associated with low head loss communication means (15) communicating with the arc area,
    - an arc contact constituted by the first end (4A) of a metal tube (4) coaxial with the circuit breaker, the second end (4B) of this tube being coupled to said operating member,
    characterized in that
    - the second cylinder (8B) has a larger diameter than the tubular part (8A),
    - the cross-section of the second piston (14, 17) is substantially larger than that of the first piston (13),
    - said second piston has orifices (14C) of calibrated size in it to limit the pressure on the side of said piston receiving the gas heated by the arc.
  2. Circuit breaker according to claim 1, characterized in that said second piston comprises an annular piston (14) outside said tube and fastened to it, said low head loss communication means being constituted by said tube (4) which comprises wide openings (15) at its periphery and the interior of said tube being closed substantially in line ath the level of said piston by a closure member (17).
  3. Circuit breaker according to claim 2 characterised in that said first piston comprises an annular valve (13) closing a cylindrical slide (11) coaxial with and external to said tube (4), and said slide is adapted to assume two positions in which it covers or uncovers openings (10) in said second cylinder (8B) discharging into the volume contiguous with said casing (1).
  4. Circuit breaker according to claim 3 characterised in that said openings are radial openings (10).
  5. Circuit breaker according to any one of claims 1 to 4 characterised in that said second piston carries a valve (16) constrained to be closed when the pressure on the face of said second piston (14) on the same side as said arc area is higher than the pressure on the other side.
EP90100019A 1989-01-02 1990-01-02 High and medium voltage gas blast circuit breaker Expired - Lifetime EP0380907B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90100019T ATE102741T1 (en) 1989-01-02 1990-01-02 COMPRESSED GAS SWITCH FOR HIGH AND MEDIUM VOLTAGE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900009A FR2641409B1 (en) 1989-01-02 1989-01-02 HIGH AND MEDIUM VOLTAGE CIRCUIT BREAKER WITH SUPPLY GAS
FR8900009 1989-01-02

Publications (3)

Publication Number Publication Date
EP0380907A1 EP0380907A1 (en) 1990-08-08
EP0380907B1 EP0380907B1 (en) 1994-03-09
EP0380907B2 true EP0380907B2 (en) 1996-12-11

Family

ID=9377438

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90100019A Expired - Lifetime EP0380907B2 (en) 1989-01-02 1990-01-02 High and medium voltage gas blast circuit breaker

Country Status (9)

Country Link
US (1) US4983789A (en)
EP (1) EP0380907B2 (en)
JP (1) JP2655733B2 (en)
CN (1) CN1016548B (en)
AT (1) ATE102741T1 (en)
BR (1) BR9000007A (en)
CA (1) CA2006934C (en)
DE (1) DE69007136T3 (en)
FR (1) FR2641409B1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2065093T3 (en) * 1991-04-12 1995-02-01 Gec Alsthom T & D Ag PRESSURE GAS SWITCH.
FR2679696B1 (en) 1991-07-24 1993-09-24 Alsthom Gec HIGH AND MEDIUM VOLTAGE CIRCUIT BREAKER WITH SUPPLY GAS.
DE59303093D1 (en) * 1992-02-06 1996-08-08 Gec Alsthom T & D Ag Gas pressure switch
EP1403891B2 (en) † 2002-09-24 2016-09-28 ABB Schweiz AG Circuit breaker
DE102007031948A1 (en) * 2007-07-06 2009-01-08 Siemens Ag Switching device arrangement, has outlet channel for filling of switching gases from switching section and moved relative to switching section, and gas outlet openings dampened depending on starting and ending of movement of channel
JP5482613B2 (en) * 2010-10-05 2014-05-07 株式会社日立製作所 Gas circuit breaker
WO2013175565A1 (en) * 2012-05-22 2013-11-28 三菱電機株式会社 Gas circuit breaker
FR3030869B1 (en) * 2014-12-19 2017-02-10 Alstom Technology Ltd CIRCUIT BREAKER COMPRISING AN OBTURABLE OPENING GAS COVER
CN106328430B (en) * 2016-08-25 2018-08-07 中国西电电气股份有限公司 A kind of arc-chutes of series connection plenum chamber
JP6818604B2 (en) * 2017-03-24 2021-01-20 株式会社日立製作所 Gas circuit breaker
US10984973B2 (en) * 2017-07-31 2021-04-20 General Electric Technology Gmbh Electric switch provided with an arc-blasting unit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957063A (en) * 1958-03-07 1960-10-18 Westinghouse Electric Corp Pumped-gas circuit interrupter
JPS5419054B2 (en) * 1973-11-07 1979-07-12
CH600538A5 (en) * 1976-04-22 1978-06-15 Bbc Brown Boveri & Cie
JPS5372176A (en) * 1976-12-10 1978-06-27 Hitachi Ltd Buffer type gas breaker
CH655611B (en) * 1981-06-18 1986-04-30
FR2576144B1 (en) * 1985-01-16 1987-02-06 Alsthom Atlantique HIGH VOLTAGE, COMPRESSED GAS, LOW-ENERGY CIRCUIT BREAKER
FR2576142B1 (en) * 1985-01-16 1987-12-24 Alsthom Atlantique HIGH VOLTAGE CIRCUIT BREAKER, COMPRESSED GAS, HANDLING ENERGY ASSISTED BY THE ARC THERMAL EFFECT
FR2596575B1 (en) * 1986-03-26 1988-05-20 Alsthom DIELECTRIC GAS CIRCUIT BREAKER UNDER PRESSURE
FR2596574B1 (en) * 1986-04-01 1988-05-20 Alsthom HIGH VOLTAGE CIRCUIT BREAKER WITH DIELECTRIC GAS UNDER PRESSURE
JP2528100B2 (en) * 1986-07-08 1996-08-28 株式会社日立製作所 Patch type gas circuit breaker

Also Published As

Publication number Publication date
EP0380907A1 (en) 1990-08-08
CA2006934C (en) 1994-04-26
BR9000007A (en) 1990-10-09
FR2641409A1 (en) 1990-07-06
JPH02230625A (en) 1990-09-13
DE69007136D1 (en) 1994-04-14
CA2006934A1 (en) 1990-07-02
EP0380907B1 (en) 1994-03-09
JP2655733B2 (en) 1997-09-24
CN1016548B (en) 1992-05-06
DE69007136T3 (en) 1997-03-06
DE69007136T2 (en) 1994-06-16
US4983789A (en) 1991-01-08
FR2641409B1 (en) 1996-04-26
CN1044008A (en) 1990-07-18
ATE102741T1 (en) 1994-03-15

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