EP0302390A1 - High or medium voltage gas blast circuit breaker with opening energy taken from the arc energy - Google Patents

High or medium voltage gas blast circuit breaker with opening energy taken from the arc energy Download PDF

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Publication number
EP0302390A1
EP0302390A1 EP88112228A EP88112228A EP0302390A1 EP 0302390 A1 EP0302390 A1 EP 0302390A1 EP 88112228 A EP88112228 A EP 88112228A EP 88112228 A EP88112228 A EP 88112228A EP 0302390 A1 EP0302390 A1 EP 0302390A1
Authority
EP
European Patent Office
Prior art keywords
contacts
circuit breaker
arc
auxiliary
piston
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
EP88112228A
Other languages
German (de)
French (fr)
Other versions
EP0302390B1 (en
Inventor
Edmond Thuries
Denis Dufournet
Michel Perret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Holdings SA
Original Assignee
Alstom SA
GEC Alsthom SA
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Filing date
Publication date
Application filed by Alstom SA, GEC Alsthom SA filed Critical Alstom SA
Priority to AT88112228T priority Critical patent/ATE77512T1/en
Publication of EP0302390A1 publication Critical patent/EP0302390A1/en
Application granted granted Critical
Publication of EP0302390B1 publication Critical patent/EP0302390B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H33/7007—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein the flow is a function of the current being interrupted
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/901—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc
    • H01H33/903—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism making use of the energy of the arc or an auxiliary arc and assisting the operating mechanism

Definitions

  • the present invention relates to a high or medium voltage circuit breaker with pressurized dielectric gas, the breaking energy of which is, for the breaking of high currents, partially drawn from that of the arc.
  • Circuit breakers comprising a arc blowing piston, the operating energy of which is provided at least partially by the gas, the pressure of which increases under the effect of the temperature increase produced by the arc.
  • circuit breaker is for example described in American patent 3,985,988.
  • An object of the invention is to provide a circuit breaker with arc blowing by piston, in which a second arc, increasing the force exerted on the piston, is only established when the current to be cut is large (short current -circuit for example) this auxiliary arc is not established when the current to be cut is low (inductive current, no-load breaking).
  • the subject of the invention is a high or medium voltage gas circuit breaker under pressure with breaking energy taken from that of the arc, of the type comprising: - a fixed assembly comprising main contacts and contacts bow, - a mobile assembly comprising main contacts and arcing contacts, a blowing volume comprising a piston moving at the separation of the contacts and pushing compressed gas through a blowing nozzle opening onto the zone where a main arc is formed at the separation of the arcing contacts, and - a set of auxiliary contacts in series with the arcing contacts to create an auxiliary arc in the volume located at the rear of the piston, characterized in that it comprises means for authorizing the separation of the auxiliary contacts only when the pressure in the blowing zone reaches a predetermined threshold.
  • the circuit breaker of Figure 1 comprises an outer casing 1, made of ceramic delimiting a volume 2 filled with a dielectric gas such as sulfur hexafluoride, under a pressure of a few bars.
  • a dielectric gas such as sulfur hexafluoride
  • a metal part comprising a first cylindrical portion 5a coaxial with the envelope, a disc part 5b perpendicular to the axis 6 of the envelope and a second cylindrical part 5c of diameter less than the diameter of the part 5a.
  • the disc part comprises preferably circular orifices 5d, regularly distributed towards the edge of the disc, for example three orifices at 120 degrees from one another.
  • the cylindrical part 5c has a thicker end 5e pierced with orifices 5f converging towards the axis 6.
  • the part 8 carries orifices 8b coincident with the orifices 5f to define blowing passages.
  • the orifices 5d pass rods 9 fixed by a first end to a ring 10 sliding in the cylinder 5a and pushed by a spring 11 bearing on the flange.
  • the second end of the rods 9 carries a piston 12 which is extended on the one hand by a metal cylinder 13 surrounding the cylinder 5a, on the other hand by an insulating cylinder 14 terminated by a bulged part 14a.
  • Parts 12, 14, 5c and 8 define a volume V1.
  • the cylinder 5a is extended by a metal part 15 provided with an annular portion 16 constituting a fixed piston sliding along the cylinder 13.
  • the volume delimited by the parts 16, 13, 12, 5c and 5b is designated by V2.
  • the pistons 12 and 16 are pierced with orifices referenced respectively 12a and 16a associated with movable valves 12b and 16b.
  • a metal tube 18 terminated by an annular shoulder 18a.
  • a cylindrical assembly comprising a first metal cylinder 19 extended by a second insulating cylinder 20 itself extended by a third metal cylinder 21, terminated by an end 21a of metal or alloy resistant to arc wear and constituting one of the main arcing contacts.
  • the cylinder 21 extends from the side opposite the end 21a by a cylindrical part external to the cylinder 20 and terminated by a portion 21c constituting one of the auxiliary arcing contacts.
  • the other auxiliary arcing contact is a metal part 22 pushed by a spring 23 bearing on the shoulder 18a, provided with a resistant end 22a.
  • the cylinder 5c has, at the right of the auxiliary arcing contacts, large openings 18b.
  • An insulating cylinder 24 is fixed to the contact 23. This cylinder has openings 24a putting the contact area 21c, 22a in connection with the volume V2 through the openings 18b.
  • the cylinder 24 has an annular part 24b provided with a sliding contact closing the volume V2 by sliding on the cylinder 22.
  • the end of the cylinder 24 has a bulged portion 24c closing the annular space between the cylinders 21 and 5c and constituting a piston.
  • the section S2 of this space is greater than the section S1 between the part 21 and the end of the part 5e.
  • the mobile assembly of the circuit breaker comprises a tube 25 with end 25a resistant to the arc and constituting the movable main arc contact, as well as fingers 26 associated with springs 27 and protected by a cover 28 and constituting the fixed main contact. .
  • the movable contacts 25 and 26 are connected as is well known to a second outlet not shown.
  • the cover 28 pushes the part 14, which causes the compression of the spring 11.
  • the main contacts 26 and 8a ensure the passage of the permanent current through the socket 4, the flange 3, the cylindrical part 5a, 5b, 5c, 5e, contact 8a and contact 26.
  • the main arcing contacts 25a-21a and the auxiliary arcing contacts 22a-21c are in contact, the spring 23 can be slack or bandaged.
  • the circuit breaker works as follows:
  • the moving part is moved by the operating rod down the figure.
  • the movement causes the separation of the auxiliary arcing contacts 22a and 21c, causing the creation of a secondary arcing; the current then flows through parts 4, 3, 5a, 5d, 18, 18a, 19, 22, arc 31, 21c, 21, 21a, arc 30, 25a and 25.
  • the arc 31 causes a strong rise in the pressure in the volume V2, which increases the pressure on the piston 12 which, acting on the large surface S4 thus contributes to increasing the blowing of the primary arc 30 by the gas of volume V1.
  • valve 12b remains closed, since it has a larger surface on the side of the volume V1 than on the side of the volume V2.
  • the valve 16b opens and prevents a depression of the volume V2 when the secondary arc appears, the removal closes it.
  • the arc 30 has insufficient energy for the increase in pressure it generates to be sufficient to move the part 24 against the action of the spring.
  • the energy contained in the spring 11 is sufficient to ensure, by its action on the piston 12, a correct blowing of the arc 30.
  • Decompression holes 21b in the part 21 and 18b in the part 18 make it possible to equalize the pressures and reduce the energy required to close the circuit breaker.
  • the current threshold to be cut from which the secondary arc is established is adjusted by the force of the spring 23.
  • blowing piston and the auxiliary arcing contacts belong to the fixed parts of the circuit breaker.
  • FIG. 3 represents a circuit breaker in which the blowing piston and the auxiliary arcing contacts belong to the mobile assembly.
  • FIGS. 1 and 3 The elements functionally common in FIGS. 1 and 3 have been given the same reference numbers.
  • the spring 11 now rests in a groove 5g of the part 5a-5b-5c which is guided in a fixed tube 33.
  • the blowing piston 12 is not coupled to the movable contact.
  • the mass of the moving part being greater than that of the moving part of the circuit breaker according to FIG. 1, the solution of FIG. 1 will often be preferred to that of FIG. 3.
  • pre-striking may occur for high nominal voltages during the closing (closing) phase of the circuit breaker.
  • Pre-ignition causes the opening of the secondary arcing contacts, causing an arcing which increases the pressure in the volume V2. It is therefore necessary to provide a means of evacuating the gas from this volume to volume 2, failing which the closing of the circuit breaker could not take place.
  • FIG 4 is a partial view of the circuit breaker of the invention, in which the elements common to Figures 1 and 4 have been given the same reference numbers.
  • the circuit breaker has the following characteristics: the cylinder 14 is made movable relative to the cylinder 13 by means of a spring 40 which is supported on a step 13a of the part 13.
  • the cylinder 13 is pierced with radial holes 13b; it is the same for the part 14, which has radial orifices 14b, situated so that, by the relative sliding of the parts 13 and 14, the orifices 13b can come into coincidence with the orifices 14b.
  • the holes 13b and 14b are also located relative to each other so that when the circuit breaker is open or being opened ( Figure 4), these holes are not in coincidence, which leaves the volume V2 closed.
  • the stroke of the part 14 can be limited by a pin 13c secured to the cylinder 13 cooperating with a light 14c of the part 14.
  • Figure 6 and a partial view in axial half-section of a circuit breaker according to an alternative embodiment.
  • auxiliary contact 22 and the part 24 are fixed and integral with the part 5a.
  • the second auxiliary contact, now referenced 45 slides in a housing 24c of the part 24, under the action of a piston 46, one face 46a of which is placed in communication with the zone of the main arc by grooves.
  • a spring 47 allows the contact 45 to be recalled.
  • the latter is provided with sliding contacts 45a ensuring the passage of current between the contact 45 and the main arcing contact.

Abstract

L'invention concerne un disjoncteur à haute ou moyenne tension à gaz sous pression à énergie de coupure prélevée sur celle de l'arc. Elle a pour objet un disjoncteur à haute ou moyenne tension à gaz sous pression à énergie de coupure prélevée sur celle de l'arc, du type comprenant : - un ensemble fixe comprenant des contacts principaux (8a) et des contacts d'arc (21a), - un ensemble mobile comprenant des contacts principaux (26) et des contact d'arc (25), - un volume de soufflage (V1) comportant un piston (12) se déplaçant à la séparation des contacts et poussant du gaz comprimé à travers une buse de soufflage (7) s'ouvrant sur la zone où se forme un arc principal à la séparation des contacts d'arc et un jeu de contacts auxiliaires (22a, 21c) en série avec les contacts d'arc pour créer un arc auxiliaire dans le volume (V2) situé à l'arrière du piston, caractérisé en ce qu'il comporte des moyens (23, 24) pour n'autoriser la séparation des contacts auxiliaires que lorsque la pression dans la zone de soufflage atteint un seuil prédéterminé.The invention relates to a high or medium voltage gas circuit breaker under pressure with breaking energy taken from that of the arc. It relates to a high or medium voltage gas circuit breaker under pressure with cut-off energy taken from that of the arc, of the type comprising: - a fixed assembly comprising main contacts (8a) and arcing contacts (21a ), - a mobile assembly comprising main contacts (26) and arcing contacts (25), - a blowing volume (V1) comprising a piston (12) moving at the separation of the contacts and pushing compressed gas to through a blowing nozzle (7) opening onto the area where a main arc forms at the separation of the arcing contacts and a set of auxiliary contacts (22a, 21c) in series with the arcing contacts to create a auxiliary arc in the volume (V2) located at the rear of the piston, characterized in that it comprises means (23, 24) for allowing the separation of the auxiliary contacts only when the pressure in the blowing zone reaches a predetermined threshold.

Description

La présente invention est relative à un disjoncteur à haute ou moyenne tension à gaz diélectrique sous pression dont l'énergie de coupure est, pour la coupure des courants de forte intensité, partiellement prélevée sur celle de l'arc.The present invention relates to a high or medium voltage circuit breaker with pressurized dielectric gas, the breaking energy of which is, for the breaking of high currents, partially drawn from that of the arc.

On connaît des disjoncteurs comprenant un piston de soufflage de l'arc dont l'énergie de manoeuvre est assurée au moins partiellement par le gaz dont la pression augmente sous l'effet de l'augmentation de température produite par l'arc.Circuit breakers are known comprising a arc blowing piston, the operating energy of which is provided at least partially by the gas, the pressure of which increases under the effect of the temperature increase produced by the arc.

Un tel disjoncteur est décrit dans le brevet français n° 77 19086.Such a circuit breaker is described in French patent n ° 77 19086.

Il a été proposé d'augmenter encore la pression à laquelle est soumise le piston en équipant le disjoncteur d'un jeu d'électrodes assurant la formation d'un second arc s'établissant en même temps que le première.It has been proposed to further increase the pressure to which the piston is subjected by equipping the circuit breaker with a set of electrodes ensuring the formation of a second arc being established at the same time as the first.

Un tel disjoncteur est par exemple décrit dans le brevet américain 3 985 988.Such a circuit breaker is for example described in American patent 3,985,988.

On a observé toutefois qu'un tel disjoncteur présente des inconvénients.However, it has been observed that such a circuit breaker has drawbacks.

En effet, la multiplication des zones d'arc entraîne une augmention du risque de réamorcage après une manoeuvre d'ouverture du disjoncteur. En particulier, il est inutile d'avoir un second arc pour la coupure des faibles courants, en particulier des faibles courants inductifs.In fact, the multiplication of arcing zones increases the risk of re-ignition after an opening operation of the circuit breaker. In particular, it is unnecessary to have a second arc for breaking low currents, in particular low inductive currents.

Un but de l'invention est de réaliser un disjoncteur à soufflage d'arc par piston, dans lequel un second arc, venant accroître la force exercée sur le piston, n'est établi que lorsque le courant à couper est important (courant de court-circuit par exemple) cet arc auxiliaire ne s'établissant pas lorsque le courant à couper est faible (courant inductif, coupure à vide).An object of the invention is to provide a circuit breaker with arc blowing by piston, in which a second arc, increasing the force exerted on the piston, is only established when the current to be cut is large (short current -circuit for example) this auxiliary arc is not established when the current to be cut is low (inductive current, no-load breaking).

L'invention a pour objet un disjoncteur à haute ou moyenne tension à gaz sous pression à énergie de coupure prélevée sur celle de l'arc, du type comprenant :
- un ensemble fixe comprenant des contacts principaux et des contacts d'arc,
- un ensemble mobile comprenant des contacts principaux et des contact d'arc,
- un volume de soufflage comportant un piston se déplaçant à la séparation des contacts et poussant du gaz comprimé à travers une buse de soufflage s'ouvrant sur la zone où se forme un arc principal à la séparation des contacts d'arc et
- un jeu de contacts auxiliaires en série avec les contacts d'arc pour créer un arc auxiliaire dans le volume situé à l'arrière du piston,
caractérisé en ce qu'il comporte des moyens pour n'autoriser la séparation des contacts auxiliaires que lorsque la pression dans la zone de soufflage atteint un seuil prédéterminé.The subject of the invention is a high or medium voltage gas circuit breaker under pressure with breaking energy taken from that of the arc, of the type comprising:
- a fixed assembly comprising main contacts and contacts bow,
- a mobile assembly comprising main contacts and arcing contacts,
a blowing volume comprising a piston moving at the separation of the contacts and pushing compressed gas through a blowing nozzle opening onto the zone where a main arc is formed at the separation of the arcing contacts, and
- a set of auxiliary contacts in series with the arcing contacts to create an auxiliary arc in the volume located at the rear of the piston,
characterized in that it comprises means for authorizing the separation of the auxiliary contacts only when the pressure in the blowing zone reaches a predetermined threshold.

L'invention est précisée par la description ci-après de plusieurs exemples de sa mise en oeuvre.The invention is clarified by the following description of several examples of its implementation.

Le dessin annexé comprend les figures ci-après :

  • - La figure 1 est une vue en demi-coupe axiale d'un disjoncteur selon un premier mode de réalisation de l'invention, position enclen­chée,
  • - La figure 2 est une vue en demi-coupe axiale du même disjonc­teur représenté au cours d'une manoeuvre de déclenchement,
  • - La figure 3 est une vue en demi-coupe axiale d'un disjoncteur selon un second mode de réalisation représenté au cours d'une manoeuvre de déclenchement,
  • - La figure 4 est une vue partielle en coupe axiale d'un disjoncteur selon un mode de réalisation voisin de celui de la figure 1, en position déclenchée.
  • - La figure 5 est la même vue partielle mais représentée au cours d'une manoeuvre d'enclenchement.
  • La figure 6 est une vue partielle en coupe axiale d'un disjoncteur selon un troisième mode de réalisation de l'invention.
The attached drawing includes the following figures:
  • FIG. 1 is a view in axial half-section of a circuit breaker according to a first embodiment of the invention, position engaged,
  • FIG. 2 is a view in axial half-section of the same circuit breaker shown during a tripping operation,
  • FIG. 3 is a view in axial half-section of a circuit breaker according to a second embodiment shown during a tripping operation,
  • - Figure 4 is a partial view in axial section of a circuit breaker according to an embodiment similar to that of Figure 1, in the tripped position.
  • - Figure 5 is the same partial view but shown during an engagement maneuver.
  • Figure 6 is a partial view in axial section of a circuit breaker according to a third embodiment of the invention.

Le disjoncteur de la figure 1 comprend une enveloppe extérieu­re 1, en céramique délimitant un volume 2 rempli d'un gaz diélectrique tel que l'hexafluorure de soufre, sous une pression de quelques bars.The circuit breaker of Figure 1 comprises an outer casing 1, made of ceramic delimiting a volume 2 filled with a dielectric gas such as sulfur hexafluoride, under a pressure of a few bars.

Un flasque métallique 3 relié à une prise de courant 4, ferme une extrémité de l'enveloppe.A metal flange 3 connected to a socket 4, closes one end of the envelope.

A ce flasque est fixée une pièce métallique comprenant une première portion cylindrique 5a coaxiale à l'enveloppe, une partie discale 5b perpendiculaire à l'axe 6 de l'enveloppe et une seconde partie cylindrique 5c de diamètre inférieur au diamètre de la partie 5a. La partie discale comprend des orifices de préférence circulai­res 5d, régulièrement répartis vers le bord du disque, par exemple trois orifices à 120 degrés l'un de l'autre.To this flange is fixed a metal part comprising a first cylindrical portion 5a coaxial with the envelope, a disc part 5b perpendicular to the axis 6 of the envelope and a second cylindrical part 5c of diameter less than the diameter of the part 5a. The disc part comprises preferably circular orifices 5d, regularly distributed towards the edge of the disc, for example three orifices at 120 degrees from one another.

La partie cylindrique 5c présente une extrémité 5e plus épaisse percée d'orifices 5f convergeant vers l'axe 6.The cylindrical part 5c has a thicker end 5e pierced with orifices 5f converging towards the axis 6.

A cette extrémité sont fixés, une buse isolante 7 et une pièce métallique 8 à extrémité tubulaire 8a constituant le contact permanent fixe du disjoncteur. La pièce 8 porte des orifices 8b en coincidences avec les orifices 5f pour définir des passages de soufflage. Par les orifices 5d passent des tiges 9 fixées par une première extrémité à une bague 10 coulissant dans le cylindre 5a et poussée par un ressort 11 s'appuyant sur le flasque. La seconde extrémité des tiges 9 porte un piston 12 qui se prolonge d'une part par un cylindre métallique 13 entourant le cylindre 5a, d'autre part par un cylindre isolant 14 terminé par une partie renflée 14a.At this end are fixed, an insulating nozzle 7 and a metal part 8 with tubular end 8a constituting the fixed permanent contact of the circuit breaker. The part 8 carries orifices 8b coincident with the orifices 5f to define blowing passages. Through the orifices 5d pass rods 9 fixed by a first end to a ring 10 sliding in the cylinder 5a and pushed by a spring 11 bearing on the flange. The second end of the rods 9 carries a piston 12 which is extended on the one hand by a metal cylinder 13 surrounding the cylinder 5a, on the other hand by an insulating cylinder 14 terminated by a bulged part 14a.

Les pièces 12, 14, 5c et 8 définissent un volume V1.Parts 12, 14, 5c and 8 define a volume V1.

Le cylindre 5a se prolonge par une pièce métallique 15 munie d'une portion annulaire 16 constituant un piston fixe coulissant le long du cylindre 13. On désigne par V2 le volume délimité par les pièces 16, 13, 12, 5c et 5b.The cylinder 5a is extended by a metal part 15 provided with an annular portion 16 constituting a fixed piston sliding along the cylinder 13. The volume delimited by the parts 16, 13, 12, 5c and 5b is designated by V2.

Les pistons 12 et 16 sont percés d'orifices référencés respecti­vement 12a et 16a associés à des clapets mobiles 12b et 16b.The pistons 12 and 16 are pierced with orifices referenced respectively 12a and 16a associated with movable valves 12b and 16b.

A la partie discale 5b est fixé un tube métallique 18 terminé par un épaulement annulaire 18a.To the disc part 5b is fixed a metal tube 18 terminated by an annular shoulder 18a.

A cet épaulement est fixée un ensemble cylindrique comprenant un premier cylindre métallique 19 prolongé par un second cylindre isolant 20 lui-même prolongé par un troisième cylindre 21 métallique, terminé par une extrémité 21a en métal ou alliage résistant à l'usure de l'arc et constituant l'un de contacts d'arc principaux.To this shoulder is fixed a cylindrical assembly comprising a first metal cylinder 19 extended by a second insulating cylinder 20 itself extended by a third metal cylinder 21, terminated by an end 21a of metal or alloy resistant to arc wear and constituting one of the main arcing contacts.

Le cylindre 21 se prolonge du côté opposé à l'extrémité 21a par une partie cylindrique extérieure au cylindre 20 et terminée par une portion 21c constituant un des contacts auxiliaire d'arc.The cylinder 21 extends from the side opposite the end 21a by a cylindrical part external to the cylinder 20 and terminated by a portion 21c constituting one of the auxiliary arcing contacts.

L'autre contact auxiliaire d'arc est une pièce métallique 22 poussée par un ressort 23 s'appuyant sur l'épaulement 18a, munie d'une extrémité résistante 22a.The other auxiliary arcing contact is a metal part 22 pushed by a spring 23 bearing on the shoulder 18a, provided with a resistant end 22a.

Le cylindre 5c présente, au droit des contacts d'arc auxiliaires, de larges ouvertures 18b.The cylinder 5c has, at the right of the auxiliary arcing contacts, large openings 18b.

Un cylindre isolant 24 est fixé au contact 23. Ce cylindre présente des ouvertures 24a mettant la zone des contacts 21c, 22a en liaison avec le volume V2 à travers les ouvertures 18b.An insulating cylinder 24 is fixed to the contact 23. This cylinder has openings 24a putting the contact area 21c, 22a in connection with the volume V2 through the openings 18b.

Le cylindre 24 présente une partie annulaire 24b munie d'un contact glissant fermant le volume V2 par glissement sur le cylin­dre 22.The cylinder 24 has an annular part 24b provided with a sliding contact closing the volume V2 by sliding on the cylinder 22.

L'extrémité du cylindre 24 présente une partie renflée 24c fermant l'espace annulaire compris entre les cylindres 21 et 5c et constituant un piston.The end of the cylinder 24 has a bulged portion 24c closing the annular space between the cylinders 21 and 5c and constituting a piston.

La section S2 de cet espace est supérieure à la section S1 entre la pièce 21 et l'extrémité de la pièce 5e.The section S2 of this space is greater than the section S1 between the part 21 and the end of the part 5e.

L'équipage mobile du disjoncteur comprend un tube 25 avec extrémité 25a résistante à l'arc et constituant le contact principal mobile d'arc, ainsi que des doigts 26 associés à des ressorts 27 et protégés par un capot 28 et constituant le contact principal fixe.The mobile assembly of the circuit breaker comprises a tube 25 with end 25a resistant to the arc and constituting the movable main arc contact, as well as fingers 26 associated with springs 27 and protected by a cover 28 and constituting the fixed main contact. .

Les contacts mobiles 25 et 26 sont reliés comme il est bien connue à une seconde prise de courant non représentée.The movable contacts 25 and 26 are connected as is well known to a second outlet not shown.

Ils sont déplaçables en bloc grâce à une tringle de manoeuvre non représentée.They can be moved as a whole thanks to an operating rod not shown.

En position enclenchée, le capot 28 repousse la pièce 14, ce qui provoque la mise en compression du ressort 11. Les contacts principaux 26 et 8a assurent le passage du courant permanent à travers la prise 4, le flasque 3, la pièce cylindrique 5a, 5b, 5c, 5e, le contact 8a et le contact 26.In the engaged position, the cover 28 pushes the part 14, which causes the compression of the spring 11. The main contacts 26 and 8a ensure the passage of the permanent current through the socket 4, the flange 3, the cylindrical part 5a, 5b, 5c, 5e, contact 8a and contact 26.

Les contacts d'arc principaux 25a-21a et les contacts d'arc auxiliaire 22a-21c sont en contact, le ressort 23 peut être détendu ou bandé.The main arcing contacts 25a-21a and the auxiliary arcing contacts 22a-21c are in contact, the spring 23 can be slack or bandaged.

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

a/ Coupure des courants de forte intensité (courants de court-circuit).a / Cutting of high intensity currents (short-circuit currents).

L'équipage mobile est déplacé par la tringle de manoeuvre vers le bas de la figure.The moving part is moved by the operating rod down the figure.

Les contacts principaux 26 et 8a se séparent, puis les contacts d'arc principaux 25a 21a se séparent à leur tour provoquant la naissance d'un arc primaire 30 (figure 2).The main contacts 26 and 8a separate, then the main arcing contacts 25a 21a separate in turn causing the creation of a primary arc 30 (Figure 2).

Lorsque le capot 28 s'est déplacé, la pièce 14 a suivi le mouvement sous l'action du ressort 11 ; il en est résulté un déplace­ment du piston 12 comprimant le volume V1 et poussant du gaz de soufflage sur l'arc 30 à travers les canaux 8b-5f.When the cover 28 has moved, the part 14 has followed the movement under the action of the spring 11; this resulted in a displacement of the piston 12 compressing the volume V1 and pushing blowing gas on the arc 30 through the channels 8b-5f.

L'augmentation de pression dans la zone voisine de l'arc primaire 30 entraîne un déplacement de la pièce 24 contre l'action du ressort 23 (vers le haut de la figure). Cette pression s'exerce sur la section S1 puis, dès que la pièce 24 s'est déplacée, sur la section S2.The increase in pressure in the area adjacent to the primary arc 30 causes the part 24 to move against the action of the spring 23 (towards the top of the figure). This pressure is exerted on the section S1 then, as soon as the part 24 has moved, on the section S2.

Le mouvement entraîne la séparation des contacts auxiliaires d'arc 22a et 21c, provoquant la naissance d'un arc secondaire ; le courant passe alors par les pièces 4, 3, 5a, 5d, 18, 18a, 19, 22, l'arc 31, 21c, 21, 21a, l'arc 30, 25a et 25.The movement causes the separation of the auxiliary arcing contacts 22a and 21c, causing the creation of a secondary arcing; the current then flows through parts 4, 3, 5a, 5d, 18, 18a, 19, 22, arc 31, 21c, 21, 21a, arc 30, 25a and 25.

L'arc 31 provoque une forte montée de la pression dans le volume V2, ce qui accroît la pression sur le piston 12 qui, s'exerçant sur la large surface S4 contribue ainsi à augmenter le soufflage de l'arc primaire 30 par le gaz du volume V1.The arc 31 causes a strong rise in the pressure in the volume V2, which increases the pressure on the piston 12 which, acting on the large surface S4 thus contributes to increasing the blowing of the primary arc 30 by the gas of volume V1.

On notera que pendant la phase d'ouverture du disjoncteur, le clapet 12b reste fermé, car il présente une surface plus grande du côté du volume V1 que du côté du volume V2. Le clapet 16b s'ouvre et évite une dépression du volume V2 lors de l'apparition de l'arc secondaire, la suppression le ferme.Note that during the opening phase of the circuit breaker, the valve 12b remains closed, since it has a larger surface on the side of the volume V1 than on the side of the volume V2. The valve 16b opens and prevents a depression of the volume V2 when the secondary arc appears, the removal closes it.

Au passage par zéro du courant, les arcs s'éteignent et le ressort 23 ramène le contact 22a au contact du contact 21c. Des trous calibrés non représentés assurent l'évacuation de la pression du volume V2 en fin de manoeuvre de déclenchement.When the current crosses zero, the arcs are extinguished and the spring 23 brings the contact 22a back into contact with the contact 21c. Calibrated holes not shown ensure the evacuation of the pressure of the volume V2 at the end of the triggering maneuver.

b/ Coupure des courants de faible intensité (coupure du courant nominal, coupure des courants inductifs).b / Cutting of low intensity currents (cut of nominal current, cut of inductive currents).

L'arc 30 a une énergie insuffisante pour que l'augmentation de pression qu'il engendre soit suffisante pour déplacer la pièce 24 contre l'action du ressort.The arc 30 has insufficient energy for the increase in pressure it generates to be sufficient to move the part 24 against the action of the spring.

Il n'y a donc pas d'arc secondaire et donc pas de risque de réamorçage engendrant des surtensions en cascade.There is therefore no secondary arc and therefore no risk of re-ignition generating cascade overvoltages.

L'énergie contenue dans le ressort 11 suffit à assurer, par son action sur le piston 12, un soufflage correct de l'arc 30.The energy contained in the spring 11 is sufficient to ensure, by its action on the piston 12, a correct blowing of the arc 30.

c/ fermeture c / closure

A la fermeture du disjoncteur, produite par le déplacement vers le haut de la figure de l'équipage mobile, le capot 28 repousse la pièce 14 contre l'action du ressort 11. Le clapet 12b s'ouvre et le clapet 16b se ferme, ce qui assure le remplissage du volume V1 depuis le volume V2.When the circuit breaker closes, produced by the upward movement of the figure of the moving assembly, the cover 28 pushes the part 14 against the action of the spring 11. The valve 12b opens and the valve 16b closes, which ensures the filling of volume V1 from volume V2.

Des trous de décompression 21b dans la pièce 21 et 18b dans la pièce 18 permettent d'égaliser les pressions et de réduire l'énergie nécessaire à la fermeture du disjoncteur.Decompression holes 21b in the part 21 and 18b in the part 18 make it possible to equalize the pressures and reduce the energy required to close the circuit breaker.

Dans le mode de réalisation qui vient d'être décrit le seuil de courant à couper à partir duquel l'arc secondaire s'établit, est réglé par la force du ressort 23.In the embodiment which has just been described, the current threshold to be cut from which the secondary arc is established is adjusted by the force of the spring 23.

On pourra donc utiliser le disjoncteur en haute ou moyenne tension et régler aisément les seuils de fonctionnement désirés.We can therefore use the circuit breaker in high or medium voltage and easily set the desired operating thresholds.

Dans l'exemple de réalisation des figures 1 et 2, le piston de soufflage et les contacts d'arc auxiliaires appartiennent aux parties fixes du disjoncteur.In the embodiment of Figures 1 and 2, the blowing piston and the auxiliary arcing contacts belong to the fixed parts of the circuit breaker.

La figure 3 représente un disjoncteur dans laquelle le piston de soufflage et les contacts d'arc auxilaire appartiennent à l'équipage mobile.FIG. 3 represents a circuit breaker in which the blowing piston and the auxiliary arcing contacts belong to the mobile assembly.

Les éléments fonctionnellement communs aux figures 1 et 3 ont reçu les mêmes numéros de référence.The elements functionally common in FIGS. 1 and 3 have been given the same reference numbers.

En haut de la figure, les contacts 25-25a et 26-27-28 sont fixes ; le reste des parties de la figure appartiennent à l'équipage mobile.At the top of the figure, the contacts 25-25a and 26-27-28 are fixed; the rest of the parts of the figure belong to the moving assembly.

Le ressort 11 s'appuie maintenant dans une gorge 5g de la pièce 5a-5b-5c qui est guidée dans un tube fixe 33.The spring 11 now rests in a groove 5g of the part 5a-5b-5c which is guided in a fixed tube 33.

Le piston de soufflage 12 n'est pas couplé au contact mobile.The blowing piston 12 is not coupled to the movable contact.

Le fonctionnement est identique à celui décrit en référence aux figures 1 et 2, l'énergie de soufflage de l'arc produit par les faibles courants étant toujours assurée par le ressort 11.The operation is identical to that described with reference to FIGS. 1 and 2, the blowing energy of the arc produced by the low currents being always provided by the spring 11.

La masse de l'équipage mobile étant supérieure à celle de l'équipage mobile du disjoncteur selon la figure 1, on préférera souvent la solution de la figure 1 à celle de la figure 3.The mass of the moving part being greater than that of the moving part of the circuit breaker according to FIG. 1, the solution of FIG. 1 will often be preferred to that of FIG. 3.

Dans les disjoncteurs du type décrit précédemment, il peut survenir, pour des tensions nominales élevées, un préamorçage pendant la phase de fermeture (enclenchement) du disjoncteur.In circuit breakers of the type described above, pre-striking may occur for high nominal voltages during the closing (closing) phase of the circuit breaker.

Le préamorçage entraîne l'ouverture des contacts d'arc secondai­res, provoquant un arc qui accroît la pression dans le volume V2. Il est donc nécessiare de prévoir un moyen d'évacuer le gaz de ce volume vers le volume 2, faute de quoi la fermeture du disjoncteur ne pourrait avoir lieu.Pre-ignition causes the opening of the secondary arcing contacts, causing an arcing which increases the pressure in the volume V2. It is therefore necessary to provide a means of evacuating the gas from this volume to volume 2, failing which the closing of the circuit breaker could not take place.

La figure 4 est une vue partielle du disjoncteur de l'invention, dans laquelle les éléments communs aux figures 1 et 4 ont reçu les mêmes numéros de référence.Figure 4 is a partial view of the circuit breaker of the invention, in which the elements common to Figures 1 and 4 have been given the same reference numbers.

On notera cette fois que le ressort 11a de manoeuvre du piston 12, s'appuie sur un épaulement annulaire 5h de la pièce 5a.It will be noted this time that the spring 11a for operating the piston 12 rests on an annular shoulder 5h of the part 5a.

Pour permettre l'évacuation du gaz du volume V2 lors de l'enclen­chement, le disjoncteur présente les caractéristiques ci-après : le cylindre 14 est rendu mobile par rapport au cylindre 13 grâce à un ressort 40 qui s'appuie sur un redan 13a de la pièce 13. Le cylindre 13 est percé d'orifices radiaux 13b ; il en est de même de la pièce 14, qui présente des orifices radiaux 14b, situés de manière que, par le coulissement relatif des pièces 13 et 14, les orifices 13b puissent venir en coincidence avec les orifices 14b.To allow the evacuation of the gas from volume V2 during switching on, the circuit breaker has the following characteristics: the cylinder 14 is made movable relative to the cylinder 13 by means of a spring 40 which is supported on a step 13a of the part 13. The cylinder 13 is pierced with radial holes 13b; it is the same for the part 14, which has radial orifices 14b, situated so that, by the relative sliding of the parts 13 and 14, the orifices 13b can come into coincidence with the orifices 14b.

Les orifices 13b et 14b sont en outre situés l'un par rapport à l'autre de manière que lorsque le disjoncteur est ouvert ou en cours d'ouverture (figure 4), ces orifices ne soient pas en coinci­dence, ce qui laisse le volume V2 fermé.The holes 13b and 14b are also located relative to each other so that when the circuit breaker is open or being opened (Figure 4), these holes are not in coincidence, which leaves the volume V2 closed.

Lorsque le disjoncteur est en cours de fermeture (figure 5), le capot 28 repousse la pièce 14 contre l'action du ressort 40.When the circuit breaker is being closed (FIG. 5), the cover 28 pushes the part 14 against the action of the spring 40.

Les orifices 13b et 14b viennent alors en coincidence, ce qui permet d'évacuer, le cas échéant, la surpression due à l'arc secondaire 31.The orifices 13b and 14b then come into coincidence, which makes it possible to remove, if necessary, the overpressure due to the secondary arc 31.

Bien entendu la force du ressort 40 est bien inférieure à celle du ressort 11a.Of course the force of the spring 40 is much lower than that of the spring 11a.

La course de la pièce 14 peut être limitée par un pion 13c solidaire du cylindre 13 coopérant avec une lumière 14c de la pièce 14.The stroke of the part 14 can be limited by a pin 13c secured to the cylinder 13 cooperating with a light 14c of the part 14.

La figure 6 et une vue partielle en demi-coupe axiale d'un disjoncteur selon une variante de réalisation.Figure 6 and a partial view in axial half-section of a circuit breaker according to an alternative embodiment.

Les éléments commun aux figures 1, 4 et 6 ont reçu les mêmes numéros de référence.The elements common to Figures 1, 4 and 6 have been given the same reference numbers.

Dans cette variante, le contact auxiliaire 22 ainsi que la pièce 24 sont fixes et solidaires de la pièce 5a.In this variant, the auxiliary contact 22 and the part 24 are fixed and integral with the part 5a.

Le second contact auxiliaire, référencé maintenant 45 coulisse dans un logement 24c de la pièce 24, sous l'action d'un piston 46 dont une face 46a est mise en communication avec la zone de l'arc principal par des rainures. Un ressort 47 permet le rappel du contact 45. Ce dernier est muni de contacts glissants 45a assurant le passage du courant entre le contact 45 et le contact principal d'arc.The second auxiliary contact, now referenced 45 slides in a housing 24c of the part 24, under the action of a piston 46, one face 46a of which is placed in communication with the zone of the main arc by grooves. A spring 47 allows the contact 45 to be recalled. The latter is provided with sliding contacts 45a ensuring the passage of current between the contact 45 and the main arcing contact.

Lorsque l'arc principal jaillit, le piston se déplace, comprimant le ressort 47 et provoquant la séparation des contacts d'arc auxiliaires.When the main arc springs, the piston moves, compressing the spring 47 and causing the separation of the auxiliary arcing contacts.

L'invention n'est pas limitée aux modes de réalisation décrits et représentés.The invention is not limited to the embodiments described and shown.

Elle s'applique par example au disjoncteur décrit dans la demande de brevet français no 86 04 393 déposée le 26 mars 1986, où l'homme de l'art saura aisément transposer les solutions précédem­ment décrites.It applies for example to the circuit breaker described in French patent application No. 86 04 393 filed on 26 March 1986 when the man in the art will readily implement the solutions described above.

Claims (6)

1/ Disjoncteur à haute ou moyenne tension à gaz sous pression à énergie de coupure prélevée sur celle de l'arc, du type comprenant :
- un ensemble fixe comprenant des contacts principaux (8a) et des contacts d'arc (21a),
- un ensemble mobile comprenant des contacts principaux (26) et des contact d'arc (25),
- un volume de soufflage (V1) comportant un piston (12) se déplaçant à la séparation des contacts et poussant du gaz comprimé à travers une buse de soufflage (7) s'ouvrant sur la zone où se forme un arc principal à la séparation des contacts d'arc et
- un jeu de contacts auxiliaires (22a, 21c) en série avec les contacts d'arc pour créer un arc auxiliaire dans le volume (V2) situé à l'arrière du piston,
caractérisé en ce qu'il comporte des moyens (23, 24) pour n'autoriser la séparation des contacts auxiliaires que lorsque la pression dans la zone de soufflage atteint un seuil prédéterminé.1 / High or medium voltage gas circuit breaker under pressure with breaking energy taken from that of the arc, of the type comprising:
- a fixed assembly comprising main contacts (8a) and arcing contacts (21a),
a mobile assembly comprising main contacts (26) and arcing contacts (25),
- a blowing volume (V1) comprising a piston (12) moving at the separation of the contacts and pushing compressed gas through a blowing nozzle (7) opening onto the zone where a main arc is formed at the separation arcing contacts and
- a set of auxiliary contacts (22a, 21c) in series with the arcing contacts to create an auxiliary arc in the volume (V2) located at the rear of the piston,
characterized in that it comprises means (23, 24) for authorizing the separation of the auxiliary contacts only when the pressure in the blowing zone reaches a predetermined threshold. 2/ Disjoncteur selon la revendication 1 caractérisé en ce que lesdits moyens comprennent un piston (24c) solidaire de l'un (22a) des contacts auxilaires et soumis à la pression de la zone d'arc principal et un ressort (23) de rappel dudit contact auxiliaire.2 / A circuit breaker according to claim 1 characterized in that said means comprise a piston (24c) integral with one (22a) of the auxiliary contacts and subjected to the pressure of the main arc zone and a return spring (23) of said auxiliary contact. 3/ Disjoncteur selon l'une des revendications 1 à 2 caractérisé en ce que les contacts auxiliaires (22a, 21c) appartiennent à l'ensem­ble fixe.3 / Circuit breaker according to one of claims 1 to 2 characterized in that the auxiliary contacts (22a, 21c) belong to the fixed assembly. 4/ Disjoncteur selon l'une des revendications 1 à 2 caractérisé en ce que les contacts auxiliaires (22a, 21c) appartiennent à l'ensemble mobile.4 / Circuit breaker according to one of claims 1 to 2 characterized in that the auxiliary contacts (22a, 21c) belong to the movable assembly. 5/ Disjoncteur selon l'une des revendications 1 à 4 caractérisé en ce que le volume (V2) situé en arrière du piston comporte au moins une ouverture (13b) associée à un moyen de fermeture (14, 40) qui ferme ladite ouverture au déclenchement du disjoncteur.5 / Circuit breaker according to one of claims 1 to 4 characterized in that the volume (V2) located behind the piston has at least one opening (13b) associated with a closure means (14, 40) which closes said opening at circuit breaker tripping. 6/ Disjoncteur selon la revendication 5 caractérisé en ce que ledit moyen de fermeture comprend un cylindre (14) muni d'une lumière (14c) et lié à l'ensemble mobile par un ressort (40).6 / A circuit breaker according to claim 5 characterized in that said closing means comprises a cylinder (14) provided with a light (14c) and connected to the movable assembly by a spring (40).
EP88112228A 1987-08-03 1988-07-28 High or medium voltage gas blast circuit breaker with opening energy taken from the arc energy Expired - Lifetime EP0302390B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88112228T ATE77512T1 (en) 1987-08-03 1988-07-28 GAS BREAKER FOR HIGH OR MEDIUM VOLTAGE WITH BREAKING ENERGY TAKEN FROM THE ARC ENERGY.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8710988A FR2619246B1 (en) 1987-08-03 1987-08-03 HIGH OR MEDIUM VOLTAGE CIRCUIT BREAKER UNDER PRESSURE WITH CURING ENERGY TAKEN FROM THE ARC
FR8710988 1987-08-03

Publications (2)

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EP0302390A1 true EP0302390A1 (en) 1989-02-08
EP0302390B1 EP0302390B1 (en) 1992-06-17

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EP88112228A Expired - Lifetime EP0302390B1 (en) 1987-08-03 1988-07-28 High or medium voltage gas blast circuit breaker with opening energy taken from the arc energy

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Country Link
US (1) US4880946A (en)
EP (1) EP0302390B1 (en)
JP (1) JPH061656B2 (en)
CN (1) CN1014193B (en)
AT (1) ATE77512T1 (en)
BR (1) BR8803823A (en)
CA (1) CA1295003C (en)
DE (1) DE3872090T2 (en)
ES (1) ES2032908T3 (en)
FR (1) FR2619246B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406794A1 (en) * 1989-07-04 1991-01-09 Gec Alsthom Sa High or middle tension circuit breaker
FR2661550A1 (en) * 1990-04-26 1991-10-31 Alsthom Gec HIGH VOLTAGE ARC CIRCUIT BREAKER.
FR2679696A1 (en) * 1991-07-24 1993-01-29 Alsthom Gec HIGH AND MEDIUM VOLTAGE CIRCUIT BREAKER WITH SUPPLY GAS.
EP0554686A1 (en) * 1992-02-06 1993-08-11 GEC Alsthom T&D AG Gas blast switch
FR2691575A1 (en) * 1992-05-25 1993-11-26 Alsthom Gec High tension circuit breaker of vertical format and filled with dielectric gas such as sulphur hexa:fluoride - uses pairs of fixed and moving contacts opened and closed by common control with top pair being ventilated by gas and bottom pair by oil when contact is broken

Families Citing this family (8)

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FR2629260B1 (en) * 1988-03-23 1994-07-08 Alsthom HIGH-VOLTAGE LOW-ENERGY CIRCUIT BREAKER
FR2639147B1 (en) * 1988-09-16 1990-12-14 Alsthom Gec HIGH VOLTAGE CIRCUIT BREAKER WITH DIELECTRIC GAS USED FOR BLOWING
FR2647255B1 (en) * 1989-05-17 1993-04-23 Alsthom Gec HIGH VOLTAGE CIRCUIT BREAKER WITH BLOWING DIELECTRIC GAS
FR2647949B1 (en) * 1989-05-31 1994-02-18 Gec Alsthom Sa HIGH VOLTAGE CIRCUIT BREAKER WITH SUPPLY DIELECTRIC GAS
FR2668648B1 (en) * 1990-10-24 1992-12-24 Alsthom Gec SF6 CIRCUIT BREAKER WITH INCORPORATED CAPACITOR.
DE59200933D1 (en) * 1991-04-12 1995-01-26 Gec Alsthom T & D Ag Gas pressure switch.
US10984973B2 (en) * 2017-07-31 2021-04-20 General Electric Technology Gmbh Electric switch provided with an arc-blasting unit
CN112968653A (en) 2021-01-29 2021-06-15 中国第一汽车股份有限公司 Electric drive system and vehicle

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DE2349263A1 (en) * 1973-10-01 1975-04-03 Bbc Brown Boveri & Cie ELECTRIC SWITCH
FR2356258A1 (en) * 1976-06-24 1978-01-20 Sprecher & Schuh Ag Compressed gas circuit breaker - has sprung free piston slidable on separator and facing fixed contact close to nozzle

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FR2593636B1 (en) * 1986-01-29 1988-03-18 Cegelec SULFUR HEXAFLUORIDE CIRCUIT BREAKER OPERATING IN A VERY LOW TEMPERATURE ENVIRONMENT

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DE1029449B (en) * 1957-01-17 1958-05-08 Licentia Gmbh High-voltage switch with two contact points connected in series within a deletion chamber
DE2349263A1 (en) * 1973-10-01 1975-04-03 Bbc Brown Boveri & Cie ELECTRIC SWITCH
FR2356258A1 (en) * 1976-06-24 1978-01-20 Sprecher & Schuh Ag Compressed gas circuit breaker - has sprung free piston slidable on separator and facing fixed contact close to nozzle

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0406794A1 (en) * 1989-07-04 1991-01-09 Gec Alsthom Sa High or middle tension circuit breaker
FR2649531A1 (en) * 1989-07-04 1991-01-11 Alsthom Gec HIGH VOLTAGE OR MEDIUM VOLTAGE CIRCUIT BREAKER
US4996399A (en) * 1989-07-04 1991-02-26 Gec Alsthom Sa High or medium tension circuit breaker
FR2661550A1 (en) * 1990-04-26 1991-10-31 Alsthom Gec HIGH VOLTAGE ARC CIRCUIT BREAKER.
EP0456025A1 (en) * 1990-04-26 1991-11-13 Gec Alsthom Sa High voltage circuit interrupter with arc in series
US5160818A (en) * 1990-04-26 1992-11-03 Gec Alsthom Sa Series-arc high tension circuit-breaker
FR2679696A1 (en) * 1991-07-24 1993-01-29 Alsthom Gec HIGH AND MEDIUM VOLTAGE CIRCUIT BREAKER WITH SUPPLY GAS.
EP0526296A1 (en) * 1991-07-24 1993-02-03 Gec Alsthom Sa Gas blast circuit brealer for high and middle tension
US5258589A (en) * 1991-07-24 1993-11-02 Gec Alsthom Sa High- and medium-voltage circuit breaker with lower operating energy
EP0554686A1 (en) * 1992-02-06 1993-08-11 GEC Alsthom T&D AG Gas blast switch
FR2691575A1 (en) * 1992-05-25 1993-11-26 Alsthom Gec High tension circuit breaker of vertical format and filled with dielectric gas such as sulphur hexa:fluoride - uses pairs of fixed and moving contacts opened and closed by common control with top pair being ventilated by gas and bottom pair by oil when contact is broken

Also Published As

Publication number Publication date
FR2619246B1 (en) 1989-11-17
JPS6459732A (en) 1989-03-07
CA1295003C (en) 1992-01-28
ATE77512T1 (en) 1992-07-15
DE3872090D1 (en) 1992-07-23
BR8803823A (en) 1989-02-21
ES2032908T3 (en) 1993-03-01
EP0302390B1 (en) 1992-06-17
US4880946A (en) 1989-11-14
CN1031153A (en) 1989-02-15
FR2619246A1 (en) 1989-02-10
CN1014193B (en) 1991-10-02
JPH061656B2 (en) 1994-01-05
DE3872090T2 (en) 1992-12-03

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