EP0149470B1 - Gas-blast high tension circuit breaker - Google Patents

Gas-blast high tension circuit breaker Download PDF

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Publication number
EP0149470B1
EP0149470B1 EP85100183A EP85100183A EP0149470B1 EP 0149470 B1 EP0149470 B1 EP 0149470B1 EP 85100183 A EP85100183 A EP 85100183A EP 85100183 A EP85100183 A EP 85100183A EP 0149470 B1 EP0149470 B1 EP 0149470B1
Authority
EP
European Patent Office
Prior art keywords
volume
gas
arc
circuit breaker
tube
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
Application number
EP85100183A
Other languages
German (de)
French (fr)
Other versions
EP0149470A2 (en
EP0149470A3 (en
Inventor
Van Doan Pham
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 SA
Original Assignee
Alstom SA
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
Application filed by Alstom SA filed Critical Alstom SA
Priority to AT85100183T priority Critical patent/ATE31995T1/en
Publication of EP0149470A2 publication Critical patent/EP0149470A2/en
Publication of EP0149470A3 publication Critical patent/EP0149470A3/en
Application granted granted Critical
Publication of EP0149470B1 publication Critical patent/EP0149470B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—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

Definitions

  • FIG. 1 represents a partial half-section of the above-mentioned circuit breaker, in which the reference numbers have the following meanings:
  • a cylindrical wall 35 coaxial with the tubes 31 and 34 makes it possible to define two volumes of amnular section, 37 and 38.

Abstract

The gas-blast type high voltage circuit breaker includes a first volume (27) in which gas pressure is increased due to heating by the breaking arc, the gas in this volume escaping to blow out the arc at current zero of the current being interrupted, and a second volume (37) in which the gas is compressed by a piston (39) at the beginning of the breaker opening phase, said gas being directed at the arc during the following phases. Circuit breaker further comprises main fixed contacts (21), fixed arcing contacts (24), main moving contacts and moving arcing contacts, the arc extending between the arcing contacts as the circuit breaker opens, said first volume (27) and second volume (37) being disposed to each side of the arcing region, being annular and ending in nozzles (26, 42) which direct separate jets of gas to the two respective roots of the arc.

Description

L'invention est relative à un disjoncteur à haute tension à soufflage d'arc, du type à gaz sous pression, dont la chambre de coupure comporte un volume dans laquelle le gaz, chauffé par l'arc de coupure et dont la pression augmente de ce fait, est utilisé pour éteindre l'arc, grâce à sa détente au moment du passage par zéro de la valeur de l'intensité du courant à couper. Le gaz est par exemple de l'hexafluorure de soufre.The invention relates to a high-voltage circuit-breaker with arc blowing, of the pressurized gas type, the cutting chamber of which comprises a volume in which the gas, heated by the cutting arc and the pressure of which increases this fact is used to extinguish the arc, thanks to its relaxation at the time of the zero crossing of the value of the intensity of the current to be cut. The gas is for example sulfur hexafluoride.

Dans le document FR-A-2 519 470 la Demanderesse à décrit un disjoncteur du type précité, dans lequel le volume est anmulaire et délimité par la surface intérieure d'une base de soufflage et un déflecteur coaxial à la buse.In document FR-A-2 519 470 the Applicant has described a circuit breaker of the aforementioned type, in which the volume is anmular and delimited by the internal surface of a blowing base and a deflector coaxial with the nozzle.

La figure 1 représente une demi-coupe partielle du disjoncteur précité, dans laquelle les numéros de références ont les significations suivantes:FIG. 1 represents a partial half-section of the above-mentioned circuit breaker, in which the reference numbers have the following meanings:

1 contact principal fixe (1: en position ouverte, l'en position fermée)

  • 2 contact d'arc fixe
  • 3 contact principal mobile
  • 4 buse de soufflage isolante
  • 5 déflecteur coaxial
  • 6 ouvertures entre le volume 9 et le volume 13
  • 7 doigts du contact principal mobile
  • 8 portion tubulaire du contact mobile; 8A extrémité de cette portion tubulaire
  • 9 volume à section annulaire pour effet thermique
  • 9A volume annulaire adjacent au volume 9
  • 10A passage amnulaire des gaz chauds de soufflage d'arc par effet thermique
  • 10B passage annulaire de la buse de soufflage par compression
  • 12 piston de soufflage fixe
  • 13 volume de compression
  • 14 conduit annulaire de soufflage.
1 fixed main contact (1: in open position, in closed position)
  • 2 fixed arcing contact
  • 3 main mobile contact
  • 4 insulating blowing nozzle
  • 5 coaxial deflector
  • 6 openings between volume 9 and volume 13
  • 7 fingers of the moving main contact
  • 8 tubular portion of the movable contact; 8At the end of this tubular portion
  • 9 annular section volume for thermal effect
  • 9A annular volume adjacent to volume 9
  • 10A amnular passage of hot arc blowing gases by thermal effect
  • 10B annular passage of the compression blowing nozzle
  • 12 fixed blow piston
  • 13 compression volume
  • 14 annular blowing duct.

On observe que, lors de l'ouverture du disjoncteur, l'arc qui prend naissance entre le contact d'arc fixe 2 et le contact 8A, est soumis aux jets de gaz provenant des volumes 9 et 13. Le volume 9 contient des gaz mis sous pression par chauffage par l'arc et, pour cette raison est appelé volume thermique; le volume 13 véhicule de l'air passé par le piston 12; pour cette raison nous l'appellerons volume de compression.It is observed that, when the circuit breaker opens, the arc which arises between the fixed arcing contact 2 and the contact 8A, is subjected to the gas jets coming from volumes 9 and 13. Volume 9 contains gases pressurized by arc heating and for this reason is called thermal volume; the volume 13 conveys the air passed through the piston 12; for this reason we will call it compression volume.

On observe que l'arc n'est énergiquement soufflé que dans la zone voisine de celle de ses racines qui s'appuient sur le contact mobile 8A. Pour obtenir un soufflage efficace pour les forts courants a couper, il faut donc que le soufflage par le gaz du volume de compression 14 soit important; or, plus ce soufflage est important, plus l'énergie nécessaire à le créer est importante, car il faut vaincre les effets de contre-pression s'exerçant sur le piston 12.It is observed that the arc is energetically blown only in the area close to that of its roots which rest on the movable contact 8A. To obtain an effective blowing for the strong currents to be cut, it is therefore necessary that the blowing by the gas of the compression volume 14 is significant; however, the greater this blowing, the greater the energy required to create it, since it is necessary to overcome the effects of back pressure exerted on the piston 12.

Un but de l'invention est d'améliorer l'effet de soufflage sans augmenter l'énergie de manoeuvre.An object of the invention is to improve the blowing effect without increasing the operating energy.

Il a été proposé d'améliorer le soufflage en disposant les volumes thermique et de compression de part et d'autre de la zone d'arc.It has been proposed to improve the blowing by arranging the thermal and compression volumes on either side of the arc zone.

Une telle disposition peut se voir dans les demandes de brevet allemand n° 1 127 442 et 29 48 976 ainsi que dans le brevet français 2 373 141.Such a provision can be seen in German patent applications Nos. 1,127,442 and 29 48,976 as well as in French patent 2,373,141.

Mais, dans les disjoncteurs décrits dans ces documents, les gaz en provenance des deux volumes sont réunis avant d'atteindre la zone d'arc, d'où il ne résulte qu'une faible amélioration de la qualité de soufflage.However, in the circuit breakers described in these documents, the gases from the two volumes are combined before reaching the arc zone, from which there results only a slight improvement in the quality of blowing.

Selon une particularité de la présente invention, les gaz en provenance des volumes thermique et de compression passent dans des buses qui dirigent des jets de soufflage distincts orientés respectivement sur chacune des racines de l'arc.According to a feature of the present invention, the gases from the thermal and compression volumes pass through nozzles which direct separate blowing jets oriented respectively on each of the roots of the arc.

L'invention a pour objet un disjoncteur à haute tension à soufflage d'arc du type a gaz souspression comportant un premier volume dans lequel la pression augmente par chauffage par l'arc de coupure, le gaz de ce volume se détendant pour souffler l'arc au moment du passage par zéro du courant à couper et un second volume dans lequel le gaz est comprimé par un piston au début de la phase d'ouverture du disjoncteur et dirigé sur l'arc dans les phases ultérieures, le disjoncteur comportant des contacts fixes principaux, des contacts fixes pare-étincelles des contacts mobiles principaux et des contacts mobiles pare-étincelles, l'arc s'étendant, au cours l'ouverture du disjoncteur, entre les contacts pare-étincelles, le premier volume et le second volume étant disposés de part et d'autre de la zone d'arc, caractérisé en ce que lesdits volumes sont annulaires et terminés par des buses dirigeant des jets de soufflage distincts orientés respectivement sur chacune des racines de l'arc, le premier volume étant délimité par un tube coaxial aux contacts fixes pare-étincelles et une buse isolante, le second volume étant délimité par un premier tube constituant le contact principal mobile et un second tube coaxial à ce dernier, un piston fixe fermant ce volume à une extrémité.The subject of the invention is a high-voltage circuit-breaker with arc blowing of the pressurized gas type comprising a first volume in which the pressure increases by heating by the cutting arc, the gas of this volume expanding to blow the arc at the time of the zero crossing of the current to be cut and a second volume in which the gas is compressed by a piston at the start of the circuit breaker opening phase and directed on the arc in the subsequent phases, the circuit breaker comprising contacts fixed main, fixed spark arrester contacts of the main movable contacts and movable spark arrester contacts, the arc extending, during the opening of the circuit breaker, between the spark arrester contacts, the first volume and the second volume being arranged on either side of the arc zone, characterized in that said volumes are annular and terminated by nozzles directing separate blowing jets oriented respectively on each of the roots of the arc, the first r volume being delimited by a coaxial tube with fixed spark arrester contacts and an insulating nozzle, the second volume being delimited by a first tube constituting the movable main contact and a second tube coaxial with the latter, a fixed piston closing this volume to a end.

L'invention est précisée par la description d'un mode de réalisation donné à titre d'exemple nullement limitatif, en référence au dessin annexé dans lequel:

  • - la figure 1 est une vue partielle en demi-coupe axiale d'un disjoncteur selon l'art antérieur
  • - les figures 2 à 6 représentent une vue en demi-coupe partielle d'un disjoncteur selon un mode préféré de réalisation de l'invention, dans diverses portions au cours de l'ouverture du disjoncteur.
The invention is clarified by the description of an embodiment given by way of nonlimiting example, with reference to the appended drawing in which:
  • - Figure 1 is a partial view in axial half-section of a circuit breaker according to the prior art
  • - Figures 2 to 6 show a partial half-section view of a circuit breaker according to a preferred embodiment of the invention, in various portions during the opening of the circuit breaker.

La figure 2 représente partiellement le disjoncteur en position fermée.Figure 2 partially shows the circuit breaker in the closed position.

On distingue l'enveloppe extérieure cylindrique en céramique 70. L'ensemble de coupure est coaxial à l'enveloppe; un volume annulaire 71 le sépare de l'enveloppe. L'ensemble de contacts fixes comprend des doigts de contacts principaux 21, fixés à un porte-contacts 22 reliés à un tube de contact 23; le porte-contacts 22 sert également de support aux doigts de contacts pare-étincelles 24 et se prolonge du côté de l'axe du disjoncteur par une partie cylindrique 22A terminée par une zone 22B en matériau résistant aux effets des arcs électriques.There is a cylindrical ceramic outer envelope 70. The cut-off assembly is coaxial with the envelope; an annular volume 71 separates it from the envelope. The set of fixed contacts comprises main contact fingers 21, fixed to a contact carrier 22 connected to a contact tube 23; the contact carrier 22 also serves as a support for the spark arrester contact fingers 24 and is extended on the axis side of the circuit breaker by a cylindrical part 22A terminated by a zone 22B made of resistant material to the effects of electric arcs.

Le porte-contact 22 sert également de support à un manchon cylindrique axial 25 terminé par une buse isolante 26.The contact carrier 22 also serves as a support for an axial cylindrical sleeve 25 terminated by an insulating nozzle 26.

Le manchon 25 et la buse 26 définissent avec la partie cylindrique 22A un volume cylindrique 27 de section annulaire, qui comme on le verra plus loin, joue le rôle de volume thermique lors d'une ouverture du disjoncteur.The sleeve 25 and the nozzle 26 define with the cylindrical part 22A a cylindrical volume 27 of annular section, which, as will be seen below, plays the role of thermal volume during opening of the circuit breaker.

L'ensemble mobile comprend:

  • - un tube de contact 31 coopérant avec les contacts principaux fixes 21 lorsque le disjoncteur est fermé;
  • - un tube 34, coaxial au tube 31, terminé par un cylindre 34A de contact pare-étincelles, dont la zone d'extrémité 34B est en matériau résistant aux effets de l'arc électrique, et coopérant avec les contacts pare-étincelle 24 lorsque le disjoncteur est fermé.
The mobile set includes:
  • - a contact tube 31 cooperating with the main fixed contacts 21 when the circuit breaker is closed;
  • a tube 34, coaxial with the tube 31, terminated by a spark arrester contact cylinder 34A, the end region 34B of which is made of a material resistant to the effects of the electric arc, and cooperating with the spark arrester contacts 24 when the circuit breaker is closed.

Les tubes 31 et 34 sont solidaires entre eux et solidaires d'une tige de manoeuvre non représentée.The tubes 31 and 34 are integral with each other and integral with an operating rod, not shown.

Une paroi cylindrique 35 coaxiale aux tubes 31 et 34 permet de définir deux volumes de section amnulaire, 37 et 38.A cylindrical wall 35 coaxial with the tubes 31 and 34 makes it possible to define two volumes of amnular section, 37 and 38.

Le volume 38 comporte un tube 41 portant à une extrémité une buse isolante 42 qui, lorsque le disjoncteur est en position fermée, vient s'appuyer sur la buse 26.The volume 38 comprises a tube 41 carrying at one end an insulating nozzle 42 which, when the circuit breaker is in the closed position, comes to bear on the nozzle 26.

L'autre extrémité du tube 41 porte un piston 43 coulissant de manière étanche dans le volume 38.The other end of the tube 41 carries a piston 43 sliding in leaktight manner in the volume 38.

Le piston est poussé par un ressort 44 s'appuyant sur un redan 45 du tube 35.The piston is pushed by a spring 44 resting on a step 45 of the tube 35.

Lorsque le disjoncteur est en position fermée, le ressort est bandé.When the circuit breaker is in the closed position, the spring is banded.

Une pluralité d'orifices, tel que 46 met en communication les deux parties du volume 38, de part et d'autre du tube 41. Les positions des orifices 40 et 46 sont choisis pour que les orifices soient côte à côte lorsque le piston 43 est en fin de course.A plurality of orifices, such as 46 connects the two parts of the volume 38, on either side of the tube 41. The positions of the orifices 40 and 46 are chosen so that the orifices are side by side when the piston 43 is at the end of the race.

Le fonctiomnement du disjoncteur est le suivant:

  • - lorsque le disjoncteur est en position fermée, le courant passe par le tube 23, les contacts 21 et le tube 31.
The circuit breaker works as follows:
  • - when the circuit breaker is in the closed position, current flows through the tube 23, the contacts 21 and the tube 31.

A l'ouverture du disjoncteur, figure 3, par déplacement de l'ensemble mobile, le courant est commuté sur les contacts pare-étincelles 24, 34A.At the opening of the circuit breaker, Figure 3, by moving the movable assembly, the current is switched to the spark arrester contacts 24, 34A.

La buse 42 reste appliquée sur la buse 26 grâce à l'action du ressort 44.The nozzle 42 remains applied to the nozzle 26 by the action of the spring 44.

Le gaz du volume 37 commence à se comprimer sous l'action du piston fixe 39, les volumes 27 et 38 étant fermés par l'application des contacts 34A sur la buse 42.The gas in volume 37 begins to compress under the action of the fixed piston 39, volumes 27 and 38 being closed by the application of contacts 34A on nozzle 42.

L'équipage mobile poursuivant sa course, figure 4, les contacts pare-étincelles se séparent et un arc A jaillit entre eux.The moving equipment continuing its course, FIG. 4, the spark arrester contacts separate and an arc A springs between them.

La figure 4 montre la phase de la coupure dans laquelle le piston 43 arrive en fin de course, mais où la buse 42 est encore appliquée sur la buse 26.FIG. 4 shows the phase of the cut-off in which the piston 43 reaches the end of the stroke, but where the nozzle 42 is still applied to the nozzle 26.

La position relative de la buse 42 et du tube pare-étincelles 34A est devenue figée et définit un orifice annulaire 50 par lequel une des racines de l'arc commence à être soufflée par le gaz comprimé par le piston 39.The relative position of the nozzle 42 and the spark arrester tube 34A has become fixed and defines an annular orifice 50 through which one of the roots of the arc begins to be blown by the gas compressed by the piston 39.

D'autre part, le gaz de la chambre 27, comprimé sous l'effet de l'arc, se détend dès le premier passage par zéro du courant, qui produit une diminution de l'intensité d'arc. L'extrémité cylindrique 22B et la buse 26 définissent un passage annulaire 60, dont le plan est perpendiculaire à l'axe du disjoncteur et à l'orifice annulaire (50).On the other hand, the gas in chamber 27, compressed under the effect of the arc, expands on the first zero crossing of the current, which produces a decrease in the arc intensity. The cylindrical end 22B and the nozzle 26 define an annular passage 60, the plane of which is perpendicular to the axis of the circuit breaker and to the annular orifice (50).

On obtient ainsi un double soufflage de l'arc, dont les directions s'appliquent aux deux extrémités ou racines de l'arc, comme le montrent les flèches F1 et F2 de la figure 4. L'arc est soufflé énergiquement et l'effet de contre-pression sur le piston est limité, de telle sorte que l'énergie nécessaire à l'ouverture est faible.A double blowing of the arc is thus obtained, the directions of which apply to the two ends or roots of the arc, as shown by the arrows F1 and F2 in FIG. 4. The arc is blown vigorously and the effect back pressure on the piston is limited, so that the energy required for opening is low.

L'équipage mobile poursuivant sa course, figure 5, les buses 26 et 42 se séparent, ce qui dégagent une large ouverture pour les gaz qui peuvent ainsi s'échapper vers l'espace 71, ainsi que vers les espaces 17 et 18 concentriques aux contacts 22A et 34 et en communication permanente avec l'espace 71.The moving part continuing its race, FIG. 5, the nozzles 26 and 42 separate, which gives off a large opening for the gases which can thus escape towards the space 71, as well as towards the spaces 17 and 18 concentric with the contacts 22A and 34 and in permanent communication with space 71.

La figure 6 montre le disjoncteur à la fin de la période de coupure.Figure 6 shows the circuit breaker at the end of the cut-off period.

La large ouverture dans l'espace 71 permet un rapide refroidissement des gaz.The wide opening in space 71 allows rapid cooling of the gases.

Claims (4)

1. A compressed gas type high voltage circuit breaker comprising a first volume (27) in which pressure increases from heating by the breaking arc, the gas in this volume escaping to blow out the arc at current zero of the current being interrupted, and a second volume (37) in which the gas is compressed by a piston (39) at the beginning of the breaker opening phase and directed at the arc during the following phases, said circuit breaker comprising main stationary or fixed contacts (21), fixed arcing contacts (24), main moving contacts and moving arcing contacts, the arc extending between the two arcing contacts during breaker opening, the first volume (27) and the second volume (37) being disposed to each side of the arcing region, characterized in that said gas volumes are annular and terminate in nozzles (26,42) aiming separate jets of gas at the two respective roots of the arc, said first volume (27) being delimited by a tube (22a) coaxial with said fixed arcing contacts and an insulating nozzle (26), the second volume being delimited by a first tube (36) forming the main moving contact and a second tube (35), coaxial with said first tube, said second volume being closed at one end by a fixed piston (39).
2. A circuit breaker according to claim 1, characterized in that a third tube (34) mounted coaxially with said first and second tubes (36, 35) and forming the moving arcing contact delimits, together with the second tube (35), an annular volume (38) in which a fourth tube (41) ending in a second insulating nozzle can move when driven by a piston (34) actuated by one end of a spring (44) whose other end pushes against a stop (45) built onto the moving contacts, the said third and fourth tubes defining a passage for the gas from the second volume said gas flowing through orifices (40,46) provided in the second and fourth tubes.
3. A circuit breaker according to claim 2, characterized in that the separation of the two insualting nozzles (26), (42) occurs after a certain stroke of the contact tube (34), required for the compression of the thermal volume (27).
4. A circuit breaker according to claims 2 and 3, characterized in that the opening (60) of the thermal volume is perpendicular to the axis of the circuit breaker and to the opening (50) of the compression volume (37).
EP85100183A 1984-01-13 1985-01-10 Gas-blast high tension circuit breaker Expired EP0149470B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85100183T ATE31995T1 (en) 1984-01-13 1985-01-10 HIGH VOLTAGE BREAKER WITH ARC BLOW.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8400474 1984-01-13
FR8400474A FR2558299B1 (en) 1984-01-13 1984-01-13 HIGH VOLTAGE CIRCUIT BREAKER WITH ARC BLOWING

Publications (3)

Publication Number Publication Date
EP0149470A2 EP0149470A2 (en) 1985-07-24
EP0149470A3 EP0149470A3 (en) 1985-08-14
EP0149470B1 true EP0149470B1 (en) 1988-01-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100183A Expired EP0149470B1 (en) 1984-01-13 1985-01-10 Gas-blast high tension circuit breaker

Country Status (5)

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US (1) US4577074A (en)
EP (1) EP0149470B1 (en)
AT (1) ATE31995T1 (en)
DE (1) DE3561429D1 (en)
FR (1) FR2558299B1 (en)

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CH645751A5 (en) * 1979-07-10 1984-10-15 Sprecher & Schuh Ag EXHAUST GAS SWITCH.
EP0035581B1 (en) * 1980-03-10 1983-11-16 Sprecher & Schuh AG Gas-blast circuit breaker
JPS57185146U (en) * 1981-05-19 1982-11-24
DE3265381D1 (en) * 1981-06-12 1985-09-19 Bbc Brown Boveri & Cie High-voltage power circuit breaker
FR2519470A1 (en) * 1982-01-05 1983-07-08 Alsthom Atlantique COMPRESSED GAS CIRCUIT BREAKER
FR2520928A1 (en) * 1982-02-04 1983-08-05 Alsthom Atlantique PNEUMATIC SELF-BLOWING CIRCUIT BREAKER

Also Published As

Publication number Publication date
FR2558299A1 (en) 1985-07-19
ATE31995T1 (en) 1988-01-15
EP0149470A2 (en) 1985-07-24
DE3561429D1 (en) 1988-02-18
FR2558299B1 (en) 1987-03-20
EP0149470A3 (en) 1985-08-14
US4577074A (en) 1986-03-18

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