EP0540971B1 - High- or medium-voltage circuit breaker with triple motion - Google Patents

High- or medium-voltage circuit breaker with triple motion Download PDF

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Publication number
EP0540971B1
EP0540971B1 EP92118278A EP92118278A EP0540971B1 EP 0540971 B1 EP0540971 B1 EP 0540971B1 EP 92118278 A EP92118278 A EP 92118278A EP 92118278 A EP92118278 A EP 92118278A EP 0540971 B1 EP0540971 B1 EP 0540971B1
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EP
European Patent Office
Prior art keywords
contact
circuit breaker
piston
displacement
actuating
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
EP92118278A
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German (de)
French (fr)
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EP0540971A1 (en
Inventor
Michel Perret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Holdings SA
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GEC Alsthom SA
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Application filed by GEC Alsthom SA filed Critical GEC Alsthom SA
Publication of EP0540971A1 publication Critical patent/EP0540971A1/en
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Publication of EP0540971B1 publication Critical patent/EP0540971B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/905—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the compression volume being formed by a movable cylinder and a semi-mobile piston
    • 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
    • H01H33/02—Details
    • H01H2033/028—Details the cooperating contacts being both actuated simultaneously in opposite directions
    • 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
    • H01H33/904—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 characterised by the transmission between operating mechanism and piston or movable contact

Definitions

  • the present invention relates to a circuit breaker comprising, in an enclosure filled with dielectric gas, in particular SF6, a first arcing contact connected to a first socket, a second arcing contact connected to a second socket and movable in a fixed cylinder, where it forms with a piston a compression chamber, the first arcing contact being movable and the circuit breaker comprising means for actuating this first arcing contact in the direction opposite to that of the displacement of the second contact.
  • dielectric gas in particular SF6
  • a first arcing contact connected to a first socket
  • a second arcing contact connected to a second socket and movable in a fixed cylinder, where it forms with a piston a compression chamber
  • the first arcing contact being movable
  • the circuit breaker comprising means for actuating this first arcing contact in the direction opposite to that of the displacement of the second contact.
  • the first contact and the piston are fixed, the separation of the contacts and the compression of the dielectric gas in the compression chamber being done by simple displacement of the second movable contact.
  • French patent FR-A-2 491 675 discloses a breaking device with a first type of displacement, that is to say the contacts of which are moved in opposite directions, in order to increase the speed of separation of the contacts without increasing the speed of the moving contact.
  • the actuating means consist of an arrangement of tie rods and connecting rods.
  • French patent FR-A-2 320 626 describes a circuit breaker with a second type of displacement, that is to say with piston and contact movable by means of rods, the fixed contact being integral with the cylinder forming blowing chamber.
  • a high speed of separation of the contacts and a large stroke to hold the voltage are sought to cut the capacitive currents.
  • a high blowing pressure and a rapid pressure build-up are required.
  • the object of the invention is to allow correct cutting of these types of current by combining the two types of movement specified above, while using the lowest possible operating energy thanks to a single rotary control.
  • the heavy piece which is the second contact
  • the cylinder is fixed.
  • the light part, which constitutes the first contact, can have a relatively high speed and stroke.
  • the circuit breaker can be filled with dielectric gas at low pressure, which improves its resistance to very cold weather.
  • the invention results in low wear of the contacts and low pollution of the dielectric gas.
  • the means for actuating the second contact and the piston preferably consist of articulated levers.
  • Figure 1 is a longitudinal sectional view of a circuit breaker according to the invention, in the closed position.
  • Figure 2 is a longitudinal sectional view of the circuit breaker, in the open position.
  • Figure 3 is a longitudinal sectional view (perpendicular to the previous) of the circuit breaker, in the closed position.
  • the circuit breaker comprises in a casing 1 a first arcing contact 2 connected to a first socket 3, a second arcing contact 4 connected to a second socket 5 and movable in a fixed cylinder 6 where it forms with a piston 7 a blowing chamber 8.
  • the circuit breaker shown is with a metal casing 1 and for clarity, the permanent contacts are not shown; they can be internal or external to the envelope, in a known manner.
  • the circuit breaker can be intended for high or medium voltage.
  • the first arcing contact 2 and the piston 7 are movable by means of actuation means ensuring the displacement of the first arcing contact 2 in the opposite direction to that of the displacement of the second contact 4 and the displacement of the piston 7 in the opposite direction to that of the displacement of the second contact 4.
  • these actuating means are a single control rotary shaft 9.
  • This horizontal shaft 9 disposed in the lower part of the circuit breaker, is connected in rotation with a pin 10 carrying at one of its ends a pin 11 and forming at its other end a fork supporting an axis 12.
  • tie rods 16 On the levers 13, near their connection with the pin 11, two horizontal axes 15 are fixed on which two tie rods 16 turn, made of insulating material, connected at their upper end by a horizontal rod 17, made of insulating material, driving the first contact 2 via an arrangement described below.
  • These tie rods 16 working only in traction are of simple section, for example round.
  • a rotary lever 18 of insulating material is mounted on the axis 12, and is mounted a rotary lever 18, of insulating material, linked to a horizontal axis 21 integral with the second contact 4.
  • the upper end of the first contact 2 has an annular flange housed in a hollow cylinder 19 integral with the first socket 3.
  • a spring 20 bearing between this flange and a lower edge of the cylinder 19 pushes the contact 2 upwards.
  • the rod 17 passes through two oblong slots in the cylinder 19 and rests on the upper end of the first contact 2.
  • the levers 13 are, on the other hand, in the low position, pulling the piston 7 in the low position near the lower end of the cylinder 6.
  • the compression volume 8 is then maximum.
  • the tie rods 16 are consequently also in the low position, the rod 17 pushing the first contact 2 downwards against the stress of the spring 20.

Landscapes

  • Circuit Breakers (AREA)
  • Push-Button Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Primary Cells (AREA)
  • Rolling Contact Bearings (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The present invention relates to a circuit breaker comprising, in a casing (1) filled with dielectric gas, in particular SF6, a first arc contact (2) connected to a first current outlet (3), a second arc contact (4) connected to a second current outlet (5) and which can move in a fixed cylinder (6) where, together with a piston (7), it forms a compression chamber (8). The first arc contact (2) and the piston (7) can move, the circuit breaker including means of actuation of the first arc contact (2) in the direction opposite to that of the displacement of the second contact (4) and of the piston (7) in the direction opposite to that of the displacement of the second contact (4). <IMAGE>

Description

La présente invention se rapporte à un disjoncteur comprenant dans une enveloppe remplie de gaz diélectrique, en particulier de SF6, un premier contact d'arc relié à une première prise de courant, un second contact d'arc relié à une seconde prise de courant et mobile dans un cylindre fixe, où il forme avec un piston une chambre de compression, le premier contact d'arc étant mobile et le disjoncteur comportant des moyens d'actionnement de ce premier contact d'arc dans le sens opposé à celui du déplacement du second contact.The present invention relates to a circuit breaker comprising, in an enclosure filled with dielectric gas, in particular SF6, a first arcing contact connected to a first socket, a second arcing contact connected to a second socket and movable in a fixed cylinder, where it forms with a piston a compression chamber, the first arcing contact being movable and the circuit breaker comprising means for actuating this first arcing contact in the direction opposite to that of the displacement of the second contact.

Généralement, dans les disjoncteurs connus, le premier contact et le piston sont fixes, la séparation des contacts et la mise en compression du gaz diélectrique dans la chambre de compression se faisant par simple déplacement du second contact mobile.Generally, in known circuit breakers, the first contact and the piston are fixed, the separation of the contacts and the compression of the dielectric gas in the compression chamber being done by simple displacement of the second movable contact.

Le brevet français FR-A-2 491 675 divulgue un dispositif de coupure à premier type de déplacement c'est-à-dire dont les contacts sont déplacés dans des sens opposés, afin d'augmenter la vitesse de séparation des contacts sans augmenter la vitesse du contact mobile. Les moyens d'actionnement sont constitués d'un agencement de tirants et de bielles.French patent FR-A-2 491 675 discloses a breaking device with a first type of displacement, that is to say the contacts of which are moved in opposite directions, in order to increase the speed of separation of the contacts without increasing the speed of the moving contact. The actuating means consist of an arrangement of tie rods and connecting rods.

Le brevet français FR-A-2 320 626 décrit un disjoncteur à second type de déplacement c'est-à-dire à piston et contact mobiles par l'intermédiaire de tringles, le contact fixe étant solidaire du cylindre formant chambre de soufflage.French patent FR-A-2 320 626 describes a circuit breaker with a second type of displacement, that is to say with piston and contact movable by means of rods, the fixed contact being integral with the cylinder forming blowing chamber.

Dans un disjoncteur à gaz diélectrique tel que le SF6, une vitesse de séparation élevée des contacts et une course importante pour tenir la tension sont recherchées pour couper les courants capacitifs. Pour couper les courants de court-circuit et de défaut kilométrique, il faut une grande pression de soufflage ainsi qu'une montée en pression rapide.In a dielectric gas circuit breaker such as SF6, a high speed of separation of the contacts and a large stroke to hold the voltage are sought to cut the capacitive currents. To cut short-circuit and mileage fault currents, a high blowing pressure and a rapid pressure build-up are required.

Le but de l'invention est de permettre une coupure correcte de ces types de courant en associant les deux types de déplacement précisés ci-dessus, tout en utilisant une énergie de manoeuvre la plus réduite possible grâce à une commande rotative unique.The object of the invention is to allow correct cutting of these types of current by combining the two types of movement specified above, while using the lowest possible operating energy thanks to a single rotary control.

Pour ce faire, le disjoncteur selon l'invention est caractérisé en ce que

  • le piston est mobile,
  • le disjoncteur comporte des moyens d'actionnement du piston dans le sens opposé à celui du déplacement du second contact,
  • les dits moyens d'actionnement des contacts et du piston sont à commande unique à arbre rotatif,
  • l'extrémité supérieure du premier contact est logée dans un cylindre creux solidaire de l'enveloppe, un ressort poussant le contact vers le haut, et est actionnée par une tige traversant deux lumières oblongues du cylindre, reposant sur l'extrémité supérieure du premier contact et reliant deux tirants dont le déplacement est commandé par l'arbre.
To do this, the circuit breaker according to the invention is characterized in that
  • the piston is mobile,
  • the circuit breaker includes means for actuating the piston in the opposite direction to that of the displacement of the second contact,
  • said means for actuating the contacts and the piston are of a single control with a rotary shaft,
  • the upper end of the first contact is housed in a hollow cylinder secured to the casing, a spring pushing the contact upwards, and is actuated by a rod passing through two oblong holes in the cylinder, resting on the upper end of the first contact and connecting two tie rods whose movement is controlled by the shaft.

L'on obtient ainsi une vitesse de séparation importante des contacts, par coopération des déplacements des deux contacts, sans nécessité d'une vitesse excessive de l'un des contacts, et une montée en pression rapide et élevée, par coopération des déplacements du second contact et du piston dans le cylindre fixe.This results in a significant separation speed of the contacts, by cooperation of the movements of the two contacts, without the need for excessive speed of one of the contacts, and a rapid and high pressure build-up, by cooperation of the movements of the second. contact and piston in the fixed cylinder.

De plus, l'énergie de manoeuvre est minimalisée. La pièce de poids élevé, que constitue le second contact, peut avoir une vitesse et une course relativement faibles. Le cylindre est, quant à lui, fixe. La pièce légère, que constitue le premier contact, peut avoir une vitesse et une course relativement élevées.In addition, the operating energy is minimized. The heavy piece, which is the second contact, can have a relatively low speed and stroke. The cylinder is fixed. The light part, which constitutes the first contact, can have a relatively high speed and stroke.

Grâce à l'invention, le disjoncteur peut être rempli de gaz diélectrique à basse pression, ce qui améliore sa tenue aux grands froids.Thanks to the invention, the circuit breaker can be filled with dielectric gas at low pressure, which improves its resistance to very cold weather.

Il résulte, de plus, de l'invention une faible usure des contacts et une faible pollution du gaz diélectrique.In addition, the invention results in low wear of the contacts and low pollution of the dielectric gas.

Par ailleurs, les moyens d'actionnement du second contact et du piston sont de préférence constitués de leviers articulés.Furthermore, the means for actuating the second contact and the piston preferably consist of articulated levers.

L'invention est décrite ci-après plus en détail à l'aide de dessins ne représentant qu'un mode de réalisation.The invention is described below in more detail using drawings representing only one embodiment.

La figure 1 est une vue en coupe longitudinale d'un disjoncteur conforme à l'invention, en position fermée.Figure 1 is a longitudinal sectional view of a circuit breaker according to the invention, in the closed position.

La figure 2 est une vue en coupe longitudinale du disjoncteur, en position ouverte.Figure 2 is a longitudinal sectional view of the circuit breaker, in the open position.

La figure 3 est une vue en coupe longitudinale (perpendiculairement aux précédentes) du disjoncteur, en position fermée.Figure 3 is a longitudinal sectional view (perpendicular to the previous) of the circuit breaker, in the closed position.

Le disjoncteur comprend dans une enveloppe 1 un premier contact d'arc 2 relié à une première prise de courant 3, un second contact d'arc 4 relié à une seconde prise de courant 5 et mobile dans un cylindre fixe 6 où il forme avec un piston 7 une chambre de soufflage 8.The circuit breaker comprises in a casing 1 a first arcing contact 2 connected to a first socket 3, a second arcing contact 4 connected to a second socket 5 and movable in a fixed cylinder 6 where it forms with a piston 7 a blowing chamber 8.

Le disjoncteur représenté est à enveloppe métallique 1 et pour plus de clarté, les contacts permanents ne sont pas représentés; ils peuvent être internes ou externes à l'enveloppe, de façon connue. Le disjoncteur peut être destiné à la haute ou à la moyenne tension.The circuit breaker shown is with a metal casing 1 and for clarity, the permanent contacts are not shown; they can be internal or external to the envelope, in a known manner. The circuit breaker can be intended for high or medium voltage.

Le premier contact d'arc 2 et le piston 7 sont mobiles par l'intermédiaire de moyens d'actionnement assurant le déplacement du premier contact d'arc 2 dans le sens opposé à celui du déplacement du second contact 4 et le déplacement du piston 7 dans le sens opposé à celui du déplacement du second contact 4.The first arcing contact 2 and the piston 7 are movable by means of actuation means ensuring the displacement of the first arcing contact 2 in the opposite direction to that of the displacement of the second contact 4 and the displacement of the piston 7 in the opposite direction to that of the displacement of the second contact 4.

ces moyens d'actionnement sont à commande unique à arbre rotatif 9. A cet arbre 9 horizontal disposé en partie basse du disjoncteur, est liée en rotation un axe 10 portant à l'une de ses extrémités un tourillon 11 et formant à son autre extrémité une fourche supportant un axe 12.these actuating means are a single control rotary shaft 9. This horizontal shaft 9 disposed in the lower part of the circuit breaker, is connected in rotation with a pin 10 carrying at one of its ends a pin 11 and forming at its other end a fork supporting an axis 12.

Sur le tourillon 11, à ses extrémités, sont montés rotatifs deux leviers 13, en matériau isolant, tournant respectivement sur des tenons 14 horizontaux solidaires du piston 7 pourvu d'un clapet de remplissage.On the pin 11, at its ends, are rotatably mounted two levers 13, made of insulating material, rotating respectively on horizontal studs 14 integral with the piston 7 provided with a filling valve.

Sur les leviers 13, à proximité de leur liaison avec le tourillon 11, sont fixés deux axes 15 horizontaux sur lesquels tournent deux tirants 16 ,en matériau isolant, reliés à leur extrémité supérieure par une tige 17 horizontale, en matériau isolant, entraînant le premier contact 2 par l'intermédiaire d'un agencement décrit plus loin. Ces tirants 16 ne travaillant qu'en traction sont de section simple par exemple ronde.On the levers 13, near their connection with the pin 11, two horizontal axes 15 are fixed on which two tie rods 16 turn, made of insulating material, connected at their upper end by a horizontal rod 17, made of insulating material, driving the first contact 2 via an arrangement described below. These tie rods 16 working only in traction are of simple section, for example round.

Sur l'axe 12, est monté un levier 18 rotatif, en matériau isolant, lié à un axe 21 horizontal solidaire du second contact 4.On the axis 12, is mounted a rotary lever 18, of insulating material, linked to a horizontal axis 21 integral with the second contact 4.

L'extrémité supérieure du premier contact 2 comporte une bride annulaire logée dans un cylindre 19 creux solidaire de la première prise de courant 3. Un ressort 20 en appui entre cette bride et un rebord inférieur du cylindre 19 pousse le contact 2 vers le haut. La tige 17 traverse deux lumières oblongues du cylindre 19 et repose sur l'extrémité supérieure du premier contact 2.The upper end of the first contact 2 has an annular flange housed in a hollow cylinder 19 integral with the first socket 3. A spring 20 bearing between this flange and a lower edge of the cylinder 19 pushes the contact 2 upwards. The rod 17 passes through two oblong slots in the cylinder 19 and rests on the upper end of the first contact 2.

Sur la figure 1, le disjoncteur est en position fermée. Dans cette position de l'arbre de commande 9, le levier 18 est en position haute poussant le second contact 4 en position haute, ainsi que sa bride annulaire portant la buse de soufflage et coulissante dans le cylindre fixe 6 par l'intermédiaire de contacts glissants; cette bride est alors à proximité de l'extrémité supérieure du cylindre 6.In Figure 1, the circuit breaker is in the closed position. In this position of the control shaft 9, the lever 18 is in the high position pushing the second contact 4 in the high position, as well as its annular flange carrying the blowing nozzle and sliding in the fixed cylinder 6 via contacts slippery; this flange is then near the upper end of the cylinder 6.

Les leviers 13 sont, par contre, en position basse, tirant le piston 7 en position basse à proximité de l'extrémité inférieure du cylindre 6. Le volume de compression 8 est alors maximal.The levers 13 are, on the other hand, in the low position, pulling the piston 7 in the low position near the lower end of the cylinder 6. The compression volume 8 is then maximum.

Les tirants 16 sont en conséquence également en position basse, la tige 17 poussant le premier contact 2 vers le bas à l'encontre de la sollicitation du ressort 20.The tie rods 16 are consequently also in the low position, the rod 17 pushing the first contact 2 downwards against the stress of the spring 20.

Lors de l'ouverture, l'arbre de commande 9 est tourné dans le sens des aiguilles d'une montre selon les figures 1 et 2, et le second contact 4 tiré vers le bas par le levier 18, le piston 7 poussé vers le haut par les leviers 13 et le premier contact 2 poussé vers le haut par le ressort 20. Le volume de la chambre de soufflage 8 est ainsi diminué rapidement et la montée en pression non seulement élevée mais rapide. Les contacts 2 et 4 sont ainsi rapidement séparés. Le passage de la position fermée (figure 1) à la position ouverte (figure 2) est réalisé par une faible rotation de l'arbre de commande 9, sur environ 45° et est donc particulièrement rapide.When opening, the control shaft 9 is turned clockwise according to FIGS. 1 and 2, and the second contact 4 pulled down by the lever 18, the piston 7 pushed towards the high by the levers 13 and the first contact 2 pushed upwards by the spring 20. The volume of the blowing chamber 8 is thus rapidly reduced and the pressure rise not only high but rapid. Contacts 2 and 4 are thus quickly separated. The transition from the closed position (Figure 1) to the open position (Figure 2) is achieved by a slight rotation of the control shaft 9, over about 45 ° and is therefore particularly rapid.

Claims (2)

  1. A circuit breaker comprising within a casing (1) filled with a dielectric gas, especially SF6, a first arcing contact (2) connected to a first terminal (3), and a second arcing contact (4) connected to a second terminal (5) and movable within a fixed cylinder (6), in which, in conjunction with a piston (7), it forms a compression chamber (8), the first arcing contact (2) being movable and the circuit breaker comprising actuating means for actuating said first arcing contact (2) in the direction opposite to that of the displacement of the second contact (4),
       the circuit breaker being characterized in that:
    - the piston is movable;
    - the circuit breaker comprises actuating means for actuating the piston (7) in the direction opposite to that of the displacement of the second contact (4);
    - the said means for actuating the contacts (2, 4) and the piston (7) have a single control member which is a rotary shaft (9); and
    - the upper end of the first contact (2) is housed in a hollow cylinder (19) integral with the casing (1), a spring (20) biasing the contact (2) upwardly, and is actuated by a rod (17) passing through two slots in the cylinder (19), bearing on the upper end of the first contact (2) and connecting two links (16) whose displacement is controlled by the shaft (9).
  2. A circuit breaker according to claim 1, characterized in that the actuating means of the second contact (4) and of the piston (7) are formed by pivoted levers (13, 18).
EP92118278A 1991-11-04 1992-10-26 High- or medium-voltage circuit breaker with triple motion Expired - Lifetime EP0540971B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9113561A FR2683383B1 (en) 1991-11-04 1991-11-04 HIGH OR MEDIUM VOLTAGE CIRCUIT BREAKER WITH TRIPLE MOTION.
FR9113561 1991-11-04

Publications (2)

Publication Number Publication Date
EP0540971A1 EP0540971A1 (en) 1993-05-12
EP0540971B1 true EP0540971B1 (en) 1997-01-22

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EP92118278A Expired - Lifetime EP0540971B1 (en) 1991-11-04 1992-10-26 High- or medium-voltage circuit breaker with triple motion

Country Status (7)

Country Link
US (1) US5293014A (en)
EP (1) EP0540971B1 (en)
AT (1) ATE148261T1 (en)
DE (1) DE69216996T2 (en)
DK (1) DK0540971T3 (en)
ES (1) ES2096004T3 (en)
FR (1) FR2683383B1 (en)

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Publication number Priority date Publication date Assignee Title
DE2245423A1 (en) * 1972-09-15 1974-03-21 Calor Emag Elektrizitaets Ag ELECTRIC PRESSURE GAS SWITCH
FR2354625A1 (en) * 1976-06-10 1978-01-06 Merlin Gerin Contact breaker with automatic spark suppression - has gas compressing piston driven by movement of one electrode
FR2491675A1 (en) * 1980-10-07 1982-04-09 Alsthom Atlantique Gas blast type high voltage circuit breaker - has operating piston moving contact ring axially into set of contacts held on hemispherical support
FR2520928A1 (en) * 1982-02-04 1983-08-05 Alsthom Atlantique PNEUMATIC SELF-BLOWING CIRCUIT BREAKER
DE3322597A1 (en) * 1983-05-31 1984-12-06 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau EXHAUST GAS SWITCH
IT1196105B (en) * 1984-05-10 1988-11-10 Sace Spa HIGH VOLTAGE ELECTRIC SWITCH WITH ARC EXTINGUISHING DEVICE BY SELF-GENERATION OF PRESSURE OF AN EXTINGUISHING FLUID
CH675175A5 (en) * 1987-10-27 1990-08-31 Bbc Brown Boveri & Cie
FR2657998B1 (en) * 1990-02-07 1992-04-10 Alsthom Gec SELF - BLOWING MEDIUM OR HIGH VOLTAGE CIRCUIT BREAKER.
FR2662540B1 (en) * 1990-05-23 1992-07-31 Alsthom Gec MEDIUM VOLTAGE CIRCUIT BREAKER.

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Publication number Publication date
FR2683383B1 (en) 1993-12-31
ATE148261T1 (en) 1997-02-15
DE69216996T2 (en) 1997-05-15
DK0540971T3 (en) 1997-04-21
DE69216996D1 (en) 1997-03-06
EP0540971A1 (en) 1993-05-12
US5293014A (en) 1994-03-08
ES2096004T3 (en) 1997-03-01
FR2683383A1 (en) 1993-05-07

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