EP0789928A1 - High-voltage circuit breaker with automatic arc extinction - Google Patents

High-voltage circuit breaker with automatic arc extinction

Info

Publication number
EP0789928A1
EP0789928A1 EP95939308A EP95939308A EP0789928A1 EP 0789928 A1 EP0789928 A1 EP 0789928A1 EP 95939308 A EP95939308 A EP 95939308A EP 95939308 A EP95939308 A EP 95939308A EP 0789928 A1 EP0789928 A1 EP 0789928A1
Authority
EP
European Patent Office
Prior art keywords
gas
circuit breaker
tube
holes
arcing contact
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.)
Granted
Application number
EP95939308A
Other languages
German (de)
French (fr)
Other versions
EP0789928B1 (en
Inventor
Naohiro Konma
Katsuo Tanaka
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.)
Siemens Transmission and Distribution SA
Nissin Electric Co Ltd
Original Assignee
Schneider Electric SE
Nissin Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=17443851&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0789928(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Schneider Electric SE, Nissin Electric Co Ltd filed Critical Schneider Electric SE
Publication of EP0789928A1 publication Critical patent/EP0789928A1/en
Application granted granted Critical
Publication of EP0789928B1 publication Critical patent/EP0789928B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • H01H33/91—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 arc-extinguishing fluid being air or gas
    • 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
    • H01H2033/888—Deflection of hot gasses and arcing products

Definitions

  • the invention relates to a high voltage and isolation gas circuit breaker, comprising a fixed arcing contact, a movable arcing contact capable of being coupled to a control mechanism to be actuated between a closed position. , and an open position, a self-blowing device with a piston cylinder associated with a blowing nozzle intended to send a jet of pressurized gas towards the cut-off interval to extinguish the arc drawn between the separate contacts, and means for cooling of the hot gas coming from the cut-off interval and arranged downstream of the blowing nozzle in the gas flow path allowing the exhaust to the outside of the circuit breaker.
  • the problem to be solved remains in the scanning of the hot gas outside the cut-off interval between the contacts of the circuit breaker.
  • the hot gas generated in the cut-off interval during the interruption of the current escapes into the tank at the earth's potential in the event of an armored circuit breaker.
  • the expansion of this hot gas in the tank risks reducing the dielectric strength between the active part of the circuit breaker and the earth / te e, or between the active parts of the phases of the circuit breaker.
  • the object of the invention is to improve the dielectric strength of a high voltage circuit breaker, and self-blowing.
  • the circuit breaker according to the invention is characterized in that the cooling means comprise a cooling tube serving as a support for the fixed arcing contact, said tube being equipped with through holes allowing the suction of cold gas towards the path of internal flow of the circuit breaker, so that the hot gas is cooled by a first effect of thermal conduction of the tube, and by a second effect of mixing with the cold gas passing through the holes.
  • the cooling means comprise a cooling tube serving as a support for the fixed arcing contact, said tube being equipped with through holes allowing the suction of cold gas towards the path of internal flow of the circuit breaker, so that the hot gas is cooled by a first effect of thermal conduction of the tube, and by a second effect of mixing with the cold gas passing through the holes.
  • the holes of the cooling tube are arranged in the vicinity of a support member for the fixed main contact, said support member comprising a conductive tube coaxially surrounding the fixed arcing contact.
  • the mobile cylinder of the self-blowing device has an outside diameter smaller than the inside diameter of the insulating jacket on which the conductive tube is mounted.
  • FIG. 1 is a sectional view of the circuit breaker according to the invention, during the power cut phase
  • FIG. 2 is a view identical to that of Figure 1, in the closed position of the circuit breaker.
  • a gas circuit breaker in particular with sulfur hexafluoride SF6, comprises an upper conducting tube 14 serving as a support for the fixed main contact 3, and mounted between a cooling tube 1 and an insulating cylindrical casing 4.
  • the cooling tube 1 supports the fixed arcing contact 2, which is arranged coaxially inside the fixed main contact 3.
  • the insulating casing 4 is arranged on a lower conductive tube 11, itself supported by a support tube 13 made of insulating material.
  • An insulating rod 12 is connected to the control mechanism (not shown), being biased upwards when the circuit breaker closes, and downwards when the circuit breakers are opened.
  • a rod movable conductor 15 of tubular shape At the end of the insulating rod 12 is a rod movable conductor 15 of tubular shape, said rod 15 supporting the movable main contact 6, the movable arcing contact 7 and a self-blowing device comprising a blowing nozzle 5 integral with the movable main contact 6.
  • the movable conductive rod 15 is provided with the axial hole 16 constituting a gas escape route.
  • the self-blowing device comprises a blowing cylinder 9 extending under the nozzle 5 and the movable main contact 6, and capable of sliding on a fixed piston 10 secured to the lower conductive tube 11.
  • a sliding contact 8 cooperates with the movable conductive rod 15, and provides the electrical connection between the movable contacts 6 and 7 and the lower conductive tube 11.
  • Holes 19 are provided between the cooling tube 1 and the conductive tube 14.
  • the insulating rod 12 is biased downwards by the mechanism, and causes the separation of the main contacts 6 and 3, then that of the arcing contacts 7 and 2.
  • the birth of the arc 17 between the arcing contacts 7 and 2 occurs simultaneously with the intervention of the self-blowing device.
  • the displacement of the blowing cylinder 9 downwards causes the compression of the gas in the pistonable space formed between the cylinder 9 and the piston 10.
  • the gas thus pressurized escapes through the nozzle 5, and in the opposite direction through the hole 16 axial of the rod 15.
  • the gas flow through the nozzle 5 is concentrated at the neck of the nozzle 5, and is directed towards the arc zone by exerting an effect extinguishing on the arc 17, followed by the escape of the hot gas 18 generated by the arc towards the downstream side of the flow path.
  • the hot gas 18 passes through the cooling tube 1, and is cooled by the thermal conduction of the cooling tube 1.
  • the level of the pressure of the gas inside the cooling tube 1 becomes lower than that of the static gas outside the tube 1 following the flow effect of the hot gas 18.
  • This pressure difference generates a suction of the cold gas 20 located outside the tube 1 towards the inside the tube 1, passing through the holes 19.
  • a mixture of cold gas 20 with the hot gas 18 then occurs inside the cooling tube 1.
  • the hot gas 18 passing through the tube 1 is cooled not only by the conduction effect of the tube 1, but also by the effect of mixing with the fresh gas 20, the temperature of which is lower than that of the hot gas 18.
  • the mixed gas 21 is then expelled to the outside of the circuit breaker, ensuring the dielectric characteristics necessary for the phase-to-phase isolation or for the phase-to-ground isolation.
  • the cooling effect of the hot gas 18 at the cooling tube 1 is increased even in the event of a reduction in the blowing gas coming from the self-blowing device.
  • the presence of the holes 19 thus makes it possible to reduce the actuation energy for blowing the arc.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

A high-voltage insulating gas circuit breaker with an automatic extinction device (9, 10) for extinguishing the arc (17) generated between the stationary arcing contact (2) and the moving arcing contact (7) when power is cut off. A cooling tube (1) downstream from the blow nozzle (5) is provided with a plurality of gas through-holes (19) in the flow path of the hot gas (18) generated by the arc. As the gas flows through the cooling tube (1), the gas pressure differential at the through-holes (19) causes fresh gas (20) to be sucked into the tube (1) and mixes the hot and fresh gases together. The gas (21) discharged from the cooling tube (1) is sufficiently cooled to maintain the dielectric properties of the circuit breaker.

Description

DISJONCTEUR A HAUTE TENSION ET A AUTOSOUFFLAGE DE L'ARC.HIGH VOLTAGE AND SELF-BLOWING CIRCUIT BREAKER.
Etat de la techniqueState of the art
L'invention est relative à un disjoncteur à haute tension et à gaz d'isolement, comprenant un contact d'arc fixe, un contact d'arc mobile susceptible d'être accouplé à un mécanisme de commande pour être actionné entre une position de fermeture, et une position d'ouverture, un dispositif à autosoufflage à piston cylindre associé à une buse de soufflage destinée à envoyer un jet de gaz pressurisé vers l'intervalle de coupure pour éteindre l'arc tiré entre les contacts séparés, et des moyens de refroidissement du gaz chaud en provenance de l'intervalle de coupure et disposés en aval de la buse de soufflage dans la voie d'écoulement de gaz autorisant l'échappement vers l'extérieur du disjoncteur.The invention relates to a high voltage and isolation gas circuit breaker, comprising a fixed arcing contact, a movable arcing contact capable of being coupled to a control mechanism to be actuated between a closed position. , and an open position, a self-blowing device with a piston cylinder associated with a blowing nozzle intended to send a jet of pressurized gas towards the cut-off interval to extinguish the arc drawn between the separate contacts, and means for cooling of the hot gas coming from the cut-off interval and arranged downstream of the blowing nozzle in the gas flow path allowing the exhaust to the outside of the circuit breaker.
Pour l'interruption d'un courant de forte intensité le problème à résoudre demeure dans le balayage du gaz chaud en dehors de l'intervalle de coupure entre les contacts du disjoncteur. Le gaz chaud généré dans l'intervalle de coupure lors de l'interruption du courant s'échappe dans la cuve au pote tiel de la terre en cas d'un disjoncteur blindé. L'expansion de ce gaz chaud dans la cuve risque de diminuer la tenue diélectrique entre la partie active du disjoncteur et la masse/te e, ou entre les parties actives des phases du disjoncteur.For the interruption of a high current the problem to be solved remains in the scanning of the hot gas outside the cut-off interval between the contacts of the circuit breaker. The hot gas generated in the cut-off interval during the interruption of the current escapes into the tank at the earth's potential in the event of an armored circuit breaker. The expansion of this hot gas in the tank risks reducing the dielectric strength between the active part of the circuit breaker and the earth / te e, or between the active parts of the phases of the circuit breaker.
Pour résoudre ce problème, il a déjà été proposé de prévoir un tube de refroidissement dans lequel le gaz chaud d'échappement en aval de l'intervalle de coupure est refroidi par effet de conduction thermique. Le gaz évacué vers la cuve est suffisamment refroidi pour que l'isolement du disjoncteur blindé reste correct.To solve this problem, it has already been proposed to provide a cooling tube in which the hot exhaust gas downstream of the cut-off interval is cooled by the effect of thermal conduction. The gas discharged to the tank is sufficiently cooled so that the insulation of the shielded circuit breaker remains correct.
Dans le cas d'un disjoncteur à autosoufflage, si le volume pistonnable du cylindre est important, la pression de soufflage engendre une quantité importante de gaz de soufflage. Il en résulte un effet significatif de refroidissement du gaz qui favorise la tenue diélectrique du disjoncteur. Dans ce cas, le refroidissement du gaz par conduction dans ledit tube de refroidissement est secondaire, mais au détriment de l'encombrement et de l'énergie nécessaire pour le dispositif à autosoufflage.In the case of a self-blowing circuit breaker, if the pistonable volume of the cylinder is large, the blowing pressure generates a large amount of blowing gas. This results in a significant gas cooling effect which promotes the dielectric strength of the circuit breaker. In this case, cooling the gas by conduction in said cooling tube is secondary, but to the detriment of the bulk and energy required for the self-blowing device.
La tendance récente de développement du disjoncteur vers la miniaturisation et la diminution de l'énergie de manoeuvre entraîne la diminution du diamètre du cylindre de soufflage. Il en découle une utilisation plus efficace de l'énergie d'arc augmentant la pression de soufflage pour obtenir un meilleur effet de soufflage d'arc. L'inconvénient d'un tel système entraîne une diminution du volume du gaz froid de soufflage, affectant l'effet de refroidissement du gaz chaud. Sous l'effet du gaz chaud, la tenue diélectrique dans la cuve du disjoncteur devient critique même en présence du tube de refroidissement en aval du soufflage.The recent development trend of the circuit breaker towards miniaturization and the reduction in operating energy leads to a reduction in the diameter of the blowing cylinder. This results in a more efficient use of arc energy increasing the blowing pressure to obtain a better arc blowing effect. The drawback of such a system results in a decrease in the volume of the cold blowing gas, affecting the cooling effect of the hot gas. Under the effect of hot gas, the dielectric strength in the tank of the circuit breaker becomes critical even in the presence of the cooling tube downstream of the blowing.
Sommaire de l'inventionSummary of the invention
L'objet de l'invention consiste à améliorer la tenue diélectrique d'un disjoncteur à haute tension, et à autosoufflage.The object of the invention is to improve the dielectric strength of a high voltage circuit breaker, and self-blowing.
Le disjoncteur selon l'invention est caractérisé en ce que les moyens de refroidissement comportent un tube de refroidissement servant de support au contact d'arc fixe, ledit tube étant équipé de trous de passage autorisant l'aspiration de gaz froid vers la voie d'écoulement interne du disjoncteur, de telle manière que le gaz chaud est refroidi par un premier effet de conduction thermique du tube, et par un deuxième effet de mélange avec le gaz froid traversant les trous.The circuit breaker according to the invention is characterized in that the cooling means comprise a cooling tube serving as a support for the fixed arcing contact, said tube being equipped with through holes allowing the suction of cold gas towards the path of internal flow of the circuit breaker, so that the hot gas is cooled by a first effect of thermal conduction of the tube, and by a second effect of mixing with the cold gas passing through the holes.
Au niveau des trous de passage du gaz agencés dans le tube de refroidissement, le gaz frais à basse température est aspiré vers l'intérieur du tube au travers desdits trous de passage du gaz par l'effet de la différence des pressions interne et externe du tube. Le gaz frais ainsi introduit dans ledit tube de refroidissement se mélange avec le gaz chaud en refroidissant ledit gaz chaud. Le gaz d'échappement vers l'extérieur du disjoncteur est suffisamment refroidi pour rétablir sa tenue d'isolement. Selon une caractéristique de l'invention, les trous du tube de refroidissement sont agencés au voisinage d'un organe de support du contact principal fixe, ledit organe de support comprenant un tube conducteur entourant coaxialement le contact d'arc fixe. Le cylindre mobile du dispositif à autosoufflage présente un diamètre extérieur inférieur au diamètre interne de l'enveloppe isolante sur laquelle est monté le tube conducteur.At the gas passage holes arranged in the cooling tube, the fresh gas at low temperature is sucked towards the interior of the tube through said gas passage holes by the effect of the difference of the internal and external pressures of the tube. The fresh gas thus introduced into said cooling tube mixes with the hot gas by cooling said hot gas. The exhaust gas to the outside of the circuit breaker is sufficiently cooled to restore its insulation behavior. According to a characteristic of the invention, the holes of the cooling tube are arranged in the vicinity of a support member for the fixed main contact, said support member comprising a conductive tube coaxially surrounding the fixed arcing contact. The mobile cylinder of the self-blowing device has an outside diameter smaller than the inside diameter of the insulating jacket on which the conductive tube is mounted.
Description sommaire des dessinsBrief description of the drawings
D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés, dans lesquels :Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example, and represented in the appended drawings, in which:
- la figure 1 est une vue en coupe du disjoncteur selon l'invention, lors de la phase de coupure du courant;- Figure 1 is a sectional view of the circuit breaker according to the invention, during the power cut phase;
- la figure 2 est une vue identique à celle de la figure 1 , en position fermée du disjoncteur.- Figure 2 is a view identical to that of Figure 1, in the closed position of the circuit breaker.
Description d'un mode de réalisation préférentielDescription of a preferred embodiment
En référence aux figures 1 et 2, un disjoncteur à gaz, notamment à hexafluorure de soufre SF6, comporte un tube conducteur 14 supérieur servant de support au contact principal fixe 3, et monté entre un tube de refroidissement 1 et une enveloppe 4 cylindrique isolante. Le tube de refroidissement 1 supporte le contact d'arc fixe 2, lequel est disposé coaxialement à l'intérieur du contact principal fixe 3. L'enveloppe isolante 4 est agencée sur un tube conducteur inférieur 11 , lui-même supporté par un tube support 13 en matériau isolant.With reference to FIGS. 1 and 2, a gas circuit breaker, in particular with sulfur hexafluoride SF6, comprises an upper conducting tube 14 serving as a support for the fixed main contact 3, and mounted between a cooling tube 1 and an insulating cylindrical casing 4. The cooling tube 1 supports the fixed arcing contact 2, which is arranged coaxially inside the fixed main contact 3. The insulating casing 4 is arranged on a lower conductive tube 11, itself supported by a support tube 13 made of insulating material.
Une bielle isolante 12 est reliée au mécanisme de commande (non représenté), en étant sollicitée vers le haut lors de la fermeture du disjoncteur, et vers le bas lors de l'ouverture. A l'extrémité de la bielle isolante 12 se trouve une tige conductrice mobile 15 de forme tubulaire, ladite tige 15 supportant le contact principal mobile 6, le contact d'arc mobile 7 et un dispositif à autosoufflage comprenant une buse 5 de soufflage solidaire du contact principal mobile 6. La tige conductrice mobile 15 est munie du trou 16 axial constituant une voie d'échappement du gaz.An insulating rod 12 is connected to the control mechanism (not shown), being biased upwards when the circuit breaker closes, and downwards when the circuit breakers are opened. At the end of the insulating rod 12 is a rod movable conductor 15 of tubular shape, said rod 15 supporting the movable main contact 6, the movable arcing contact 7 and a self-blowing device comprising a blowing nozzle 5 integral with the movable main contact 6. The movable conductive rod 15 is provided with the axial hole 16 constituting a gas escape route.
Le dispositif à autosoufflage comprend un cylindre de soufflage 9 s'étendant sous la buse 5 et le contact principal mobile 6, et susceptible de coulisser sur un piston fixe 10 assujetti au tube conducteur inférieur 11. Un contact glissant 8 coopère avec la tige conductrice mobile 15, et assure la connexion électrique entre les contacts mobiles 6 et 7 et le tube conducteur inférieur 11.The self-blowing device comprises a blowing cylinder 9 extending under the nozzle 5 and the movable main contact 6, and capable of sliding on a fixed piston 10 secured to the lower conductive tube 11. A sliding contact 8 cooperates with the movable conductive rod 15, and provides the electrical connection between the movable contacts 6 and 7 and the lower conductive tube 11.
Des trous 19 sont prévus entre le tube de refroidissement 1 , et le tube conducteur 14.Holes 19 are provided between the cooling tube 1 and the conductive tube 14.
Dans la position fermée de la figure 2, les contacts principaux 6 et 3 se trouvent en engagement l'un avec l'autre et assurent le passage du courant dans le circuit formé par le tube conducteur supérieur 14, le contact principal fixe 3, le contact principal mobile 6, la tige conductrice mobile 15, le contact glissant 8, et le tube conducteur inférieur 11.In the closed position of Figure 2, the main contacts 6 and 3 are in engagement with each other and ensure the passage of current in the circuit formed by the upper conductive tube 14, the fixed main contact 3, the movable main contact 6, movable conductive rod 15, sliding contact 8, and lower conductive tube 11.
Lors de la phase d'interruption du courant, la bielle isolante 12 est sollicitée vers le bas par le mécanisme, et provoque la séparation des contacts principaux 6 et 3, puis celle des contacts d'arc 7 et 2. La naissance de l'arc 17 entre les contacts d'arc 7 et 2 intervient simultanément avec l'intervention du dispositif à autosoufflage.During the current interruption phase, the insulating rod 12 is biased downwards by the mechanism, and causes the separation of the main contacts 6 and 3, then that of the arcing contacts 7 and 2. The birth of the arc 17 between the arcing contacts 7 and 2 occurs simultaneously with the intervention of the self-blowing device.
Le déplacement du cylindre de soufflage 9 vers le bas provoque la compression du gaz dans l'espace pistonnable formé entre le cylindre 9 et le piston 10. Le gaz ainsi pressurisé s'échappe à travers la buse 5, et en sens opposé par le trou 16 axial de la tige 15. L'écoulement gazeux à travers la buse 5 est concentré au niveau du col de la buse 5, et est dirigé vers la zone d'arc en exerçant un effet d'extinction sur l'arc 17, suivi de l'échappement du gaz chaud 18 généré par l'arc vers le côté aval de la voie d'écoulement.The displacement of the blowing cylinder 9 downwards causes the compression of the gas in the pistonable space formed between the cylinder 9 and the piston 10. The gas thus pressurized escapes through the nozzle 5, and in the opposite direction through the hole 16 axial of the rod 15. The gas flow through the nozzle 5 is concentrated at the neck of the nozzle 5, and is directed towards the arc zone by exerting an effect extinguishing on the arc 17, followed by the escape of the hot gas 18 generated by the arc towards the downstream side of the flow path.
Le gaz chaud 18 traverse le tube de refroidissement 1, et est refroidi par la conduction thermique du tube de refroidissement 1. Au niveau des trous 19 de passage du gaz, le niveau de la pression du gaz à l'intérieur du tube de refroidissement 1 devient inférieur à celui du gaz statique à l'extérieur du tube 1 suite à l'effet d'écoulement du gaz chaud 18. Cette différence de pression engendre une aspiration du gaz froid 20 se trouvant à l'extérieur du tube 1 vers l'intérieur du tube 1, en passant par les trous 19. Il se produit alors un mélange de gaz froid 20 avec le gaz chaud 18 à l'intérieur du tube de refroidissement 1.The hot gas 18 passes through the cooling tube 1, and is cooled by the thermal conduction of the cooling tube 1. At the gas passage holes 19, the level of the pressure of the gas inside the cooling tube 1 becomes lower than that of the static gas outside the tube 1 following the flow effect of the hot gas 18. This pressure difference generates a suction of the cold gas 20 located outside the tube 1 towards the inside the tube 1, passing through the holes 19. A mixture of cold gas 20 with the hot gas 18 then occurs inside the cooling tube 1.
Le gaz chaud 18 passant dans le tube 1 est refroidi non seulement par l'effet de conduction du tube 1 , mais aussi par l'effet de mélange avec le gaz frais 20, dont la température est inférieure à celle du gaz chaud 18.The hot gas 18 passing through the tube 1 is cooled not only by the conduction effect of the tube 1, but also by the effect of mixing with the fresh gas 20, the temperature of which is lower than that of the hot gas 18.
Le gaz mélangé 21 est ensuite chassé vers l'extérieur du disjoncteur en assurant les caractéristiques diélectriques nécessaires pour l'isolement entre phases ou pour l'isolement phase-masse.The mixed gas 21 is then expelled to the outside of the circuit breaker, ensuring the dielectric characteristics necessary for the phase-to-phase isolation or for the phase-to-ground isolation.
L'effet de refroidissement du gaz chaud 18 au niveau du tube de refroidissement 1 est augmenté même en cas de diminution du gaz de soufflage en provenance du dispositif à autosoufflage. La présence des trous 19 permet ainsi de réduire l'énergie d'actionnement pour le soufflage de l'arc. The cooling effect of the hot gas 18 at the cooling tube 1 is increased even in the event of a reduction in the blowing gas coming from the self-blowing device. The presence of the holes 19 thus makes it possible to reduce the actuation energy for blowing the arc.

Claims

REVENDICATIONS
1. Disjoncteur à haute tension et à gaz d'isolement, comprenant un contact d'arc fixe (2), un contact d'arc mobile (7) susceptible d'être accouplé à un mécanisme de commande pour être actionné entre une position de fermeture, et une position d'ouverture, un dispositif à autosoufflage à piston (10) cylindre (9) associé à une buse de soufflage (5) destinée à envoyer un jet de gaz pressurisé vers l'intervalle de coupure pour éteindre l'arc tiré entre les contacts (2, 7) séparés, et des moyens de refroidissement du gaz chaud en provenance de l'intervalle de coupure et disposés en aval de la buse de soufflage (5) dans la voie d'écoulement de gaz autorisant l'échappement vers l'extérieur du disjoncteur, caractérisé en ce que les moyens de refroidissement comportent un tube (1 ) de refroidissement servant de support au contact d'arc fixe (2), ledit tube (1) étant équipé de trous (19) de passage autorisant l'aspiration de gaz froid vers la voie d'écoulement interne du disjoncteur, de telle manière que le gaz chaud est refroidi par un premier effet de conduction thermique du tube (1), et par un deuxième effet de mélange avec le gaz froid traversant les trous (19).1. High voltage circuit breaker and isolation gas, comprising a fixed arcing contact (2), a movable arcing contact (7) capable of being coupled to a control mechanism to be actuated between a position closing, and an open position, a piston self-blowing device (10) cylinder (9) associated with a blowing nozzle (5) intended to send a jet of pressurized gas towards the cut-off interval to extinguish the arc drawn between the separate contacts (2, 7), and means for cooling the hot gas coming from the cut-off interval and arranged downstream of the blowing nozzle (5) in the gas flow path allowing the exhaust to the outside of the circuit breaker, characterized in that the cooling means comprise a cooling tube (1) serving as a support for the fixed arcing contact (2), said tube (1) being equipped with holes (19) for passage allowing the suction of cold gas to the internal flow path of the circuit breaker, so that the hot gas is cooled by a first effect of thermal conduction of the tube (1), and by a second effect of mixing with the cold gas passing through the holes (19).
2. Disjoncteur à haute tension selon la revendication 1 , caractérisé en ce que les trous (19) du tube de refroidissement (1) sont agencés au voisinage d'un organe de support du contact principal fixe (3), ledit organe de support comprenant un tube conducteur (14) entourant coaxialement le contact d'arc fixe (2).2. High voltage circuit breaker according to claim 1, characterized in that the holes (19) of the cooling tube (1) are arranged in the vicinity of a support member of the fixed main contact (3), said support member comprising a conductive tube (14) coaxially surrounding the fixed arcing contact (2).
3. Disjoncteur à haute tension selon la revendication 2, caractérisé en ce que le cylindre (9) mobile du dispositif à autosoufflage présente un diamètre extérieur inférieur au diamètre interne de l'enveloppe (4) isolante sur laquelle est monté le tube conducteur (14). 3. High voltage circuit breaker according to claim 2, characterized in that the movable cylinder (9) of the self-blowing device has an outside diameter smaller than the internal diameter of the insulating casing (4) on which the conductive tube (14) is mounted. ).
EP95939308A 1994-10-31 1995-10-31 High-voltage circuit breaker with automatic arc extinction Revoked EP0789928B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP267367/94 1994-10-31
JP6267367A JP2910582B2 (en) 1994-10-31 1994-10-31 Gas circuit breaker for electric power
PCT/FR1995/001434 WO1996013844A1 (en) 1994-10-31 1995-10-31 High-voltage circuit breaker with automatic arc extinction

Publications (2)

Publication Number Publication Date
EP0789928A1 true EP0789928A1 (en) 1997-08-20
EP0789928B1 EP0789928B1 (en) 1998-12-09

Family

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Application Number Title Priority Date Filing Date
EP95939308A Revoked EP0789928B1 (en) 1994-10-31 1995-10-31 High-voltage circuit breaker with automatic arc extinction

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US (1) US5978200A (en)
EP (1) EP0789928B1 (en)
JP (1) JP2910582B2 (en)
DE (1) DE69506581T2 (en)
WO (1) WO1996013844A1 (en)

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US7736529B2 (en) * 2007-10-12 2010-06-15 Honeywell International Inc Azeotrope-like compositions containing sulfur hexafluoride and uses thereof
DE102008039813A1 (en) * 2008-08-25 2010-03-04 Siemens Aktiengesellschaft High voltage circuit breaker with one switching path
WO2010112058A1 (en) * 2009-03-30 2010-10-07 Abb Research Ltd Circuit breaker
DE102009057703A1 (en) * 2009-12-04 2011-06-09 Siemens Aktiengesellschaft Circuit breaker arrangement
DE102012202408A1 (en) * 2012-02-16 2013-08-22 Siemens Aktiengesellschaft Switchgear arrangement
FR3001575B1 (en) * 2013-01-29 2015-03-20 Alstom Technology Ltd CIRCUIT BREAKER WITH MEANS REDUCING THE ARC SWITCH BETWEEN PERMANENT CONTACTS
JP6478836B2 (en) * 2015-06-29 2019-03-06 株式会社東芝 Gas circuit breaker
DE102016214196B4 (en) 2016-08-02 2019-11-21 Siemens Aktiengesellschaft Interrupter unit for a circuit breaker
CN110914947B (en) * 2017-07-31 2021-12-28 通用电器技术有限公司 Electrical switch provided with an arc-blowing unit
CN114758931B (en) * 2022-04-24 2024-02-23 北京华盛中能科技有限公司 Circuit breaker with exhaust cooling system
CN115206744B (en) * 2022-09-19 2022-12-13 四川宝光电器设备有限公司 Special sulfur hexafluoride circuit breaker for switching reactive compensation of gas insulation switch cabinet
CN115527788A (en) * 2022-10-20 2022-12-27 四川大学 Liquid cooling radiating tube and vacuum arc extinguish chamber with built-in liquid cooling radiating tube

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Also Published As

Publication number Publication date
EP0789928B1 (en) 1998-12-09
US5978200A (en) 1999-11-02
WO1996013844A1 (en) 1996-05-09
DE69506581T2 (en) 1999-07-01
JPH08129937A (en) 1996-05-21
JP2910582B2 (en) 1999-06-23
DE69506581D1 (en) 1999-01-21

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