EP0807946B1 - High-voltage gas-blast puffer type circuit-breaker - Google Patents

High-voltage gas-blast puffer type circuit-breaker Download PDF

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Publication number
EP0807946B1
EP0807946B1 EP97401034A EP97401034A EP0807946B1 EP 0807946 B1 EP0807946 B1 EP 0807946B1 EP 97401034 A EP97401034 A EP 97401034A EP 97401034 A EP97401034 A EP 97401034A EP 0807946 B1 EP0807946 B1 EP 0807946B1
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EP
European Patent Office
Prior art keywords
piston
gas
fixed
tube
ring
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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
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EP97401034A
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German (de)
French (fr)
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EP0807946A1 (en
Inventor
Bernard Gallix
Roger Ledru
Antoine Tolossi
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Grid Solutions SAS
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GEC Alsthom T&D SA
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88Switches 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
    • H01H33/90Switches 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
    • H01H33/905Switches 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

Definitions

  • the present invention relates to a self-blowing circuit breaker comprising an envelope filled with a pressurized dielectric gas, two cooperating arcing contacts, one of which is part of a contact assembly mobile secured to an operating member and adapted to be moved axially in the envelope between a closed position and a position opening, the movable contact assembly comprising a first tube carrying its end the movable arcing contact and a second tube coaxial with the first tube, carrying at the end a permanent movable and delimiting contact, on both sides a crown connecting the first tube and the second tube, a blowing closed by a blowing nozzle and a compression chamber communicating with the blowing chamber and closed by a piston.
  • Patent application FR 2 696 274 describes such a circuit breaker.
  • the piston is semi-mobile and there is provided a means for immobilizing the piston during a first part of the movement of the movable contact assembly when the circuit breaker opens and a means to, on the contrary, drive axially this same piston during a second part of the displacement of this set.
  • the means for axially driving the movable contact assembly to during this second part of the displacement is constituted by an organ drive integral with the movable contact assembly which causes a stop secured to the piston.
  • This stop is arranged on the path of the organ training.
  • the piston is held in a fixed position by a spring placed between the piston and the drive member and pushing the piston which is retained by a crown in abutment against a fixed member, the crown being integral with a tube itself secured to the piston.
  • the organ drive slides in a lumen of the tube connecting the piston to the crown until it comes to a stop at the end of the resulting light, then the piston in the second part of the trip.
  • the spring urging the semi-mobile piston causes a permanent effort on the control rod and causes a increase in the operating energy required.
  • EP 0 126 929 describes a compressed gas switch according to the preamble of claim 1 having a slightly different structure in the sense that there is no second tube but an annular piston 12, linked to a tube 8, carrying a nominal current contact 5 and sliding directly into an external cylindrical housing 14.
  • This arrangement ensures the automatic recoil of the free piston under the effect increase in pressure in the compression chamber at the time of the opening maneuver and thereby limits the increase in pressure, it thus brings the advantages of the semi-mobile piston of the first document cited in the introduction but without the control rod being subject to additional effort.
  • the object of the invention is therefore to propose a circuit breaker having a structure as defined in the introduction, incorporating a free piston with its advantages but overcoming the drawback mentioned above.
  • the subject of the invention is therefore a self-blowing circuit breaker comprising an envelope filled with a dielectric gas under pressure, two arcing contacts cooperating with each other, one of which is part of a fixed mobile contact assembly an actuator and adapted to be moved axially in the envelope between a closed position and an open position, the movable contact assembly comprising a first tube carrying to its end of the movable arcing contact and a second tube coaxial with the first tube, carrying at the end a permanent movable and delimiting contact, on both sides a crown connecting the first tube and the second tube, a blowing closed by a blowing nozzle and a compression chamber communicating with the blowing chamber and closed by a piston, characterized in that said annular piston located between the two said tubes is mounted at free sliding between a fixed front stop and a thrust spring, one of which end is supported on the piston and whose other end is in fixed support, this fixed support 18 being located on the other side of said front stop fixed relative to said arcing contacts, said piston comprising on the side
  • Figures 1 to 6 partially show a circuit breaker according to the invention in its different positions during an opening maneuver, from the closed state in figure 1 to the complete opening in figure 6.
  • Figure 7 is an enlarged view of a detail of the previous figures showing the piston with its recess and the ring, allowing damping when the piston returns.
  • circuit breaker comprising an example is described.
  • for each phase an insulating envelope.
  • the invention applies also to earthed metal casing circuit breakers comprising a separate envelope for each phase or a single envelope for all three phases.
  • reference 1 designates an envelope insulating, preferably porcelain, delimiting an expansion chamber 2 filled with a gas having good dielectric properties, for example hexafluoride of sulfur under a pressure of a few bars.
  • the circuit breaker includes a fixed assembly and a contact assembly mobile.
  • the fixed assembly includes an arcing contact 3 and a permanent contact fixed consisting of a circular series of fingers 4. These fixed arcing contacts 3 and permanent 4 are linked to a first socket 5.
  • the movable contact assembly includes an operating part 6 insulation passing through chamber 2 and connected, at one of its ends, to a mechanism not shown. Its other end is linked to a whole metal of movable contacts comprising two coaxial tubes 7 and 8. These two tubes 7 and 8 are interconnected by a metal crown 9.
  • the tube internal 7 carries the movable arcing contact 10 and the external tube 8 carries the contact mobile permanent 11 which cooperates, in the closed position of the circuit breaker such that shown in Figure 1, by its outer periphery with the fingers 4 of the contact permanent fixed.
  • a nozzle blowing 12 made of insulating material.
  • the space between the permanent movable contact 11, the arcing contact mobile 10, the crown 9 and the blowing nozzle 12 constitutes a blowing 13. Furthermore, the tubes 7 and 8, an annular piston 14 located between the two tubes, and the metal crown 9 define a compression chamber 15. This compression chamber 15 is separated from the blowing chamber 13 by the metal crown 9 fitted with one-way valves 16 authorizing the passage of gas from the compression chamber 15 to the blowing 13.
  • Permanent contact fingers 17, linked to a bottom plate 18 connected to a second outlet not shown, are in electrical contact sliding with the outer tube 8.
  • the annular piston 14 is mounted to slide freely between a stop fixed front and a thrust spring 19, one end of which bears on the piston and the other against the fixed bottom plate 18.
  • the annular piston 14 also slides along three fixed tie rods 20 (only one is visible in the figures) whose head 21 serves as a fixed front stop for the piston 14.
  • the fixed tie rods 20 are fixed to a fixed sleeve 22 linked to the plate bottom 18. This sleeve 22 guides the spring 19.
  • the piston 14 is equipped with a valve 23 allowing the passage of the gas from the expansion chamber 2 towards the compression chamber 15 and not in the reverse. It also includes an annular recess 24 clearly visible on the Figures 3, 4 and 5.
  • a floating ring 25 is housed at the bottom of this recess 24, pushed by the piston against a washer fixed 26, itself pressing against the head 21 of the tie rods 20.
  • the floating ring 25 is pierced with three 120 ° holes for the passage tie rods and also orifices 27 interposed between the through holes of the tie rods 20.
  • the floating ring 25 is mounted between the fixed washer 26 and a member rear retainer 28 constituting a flange of a barrel 29.
  • This barrel 29 is immobilized axially on the tie rod 20 by a shoulder 30 of the tie rod and by the head 21 of the tie rod 20.
  • the head 21 is actually a screw head tightening the fixed washer 26 and barrel 29 against the shoulder 30 of the tie rod 20.

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  • Circuit Breakers (AREA)

Description

La présente invention concerne un disjoncteur à auto-soufflage comprenant une enveloppe remplie d'un gaz diélectrique sous pression, deux contacts d'arc coopérant entre eux, l'un faisant partie d'un ensemble de contact mobile solidaire d'un organe de manoeuvre et adapté pour être déplacé axialement dans l'enveloppe entre une position de fermeture et une position d'ouverture, l'ensemble de contact mobile comprenant un premier tube portant à son extrémité le contact d'arc mobile et un second tube coaxial au premier tube, portant en extrémité un contact permanent mobile et délimitant, de part et d'autre d'une couronne reliant le premier tube et le second tube, une chambre de soufflage fermée par une buse de soufflage et une chambre de compression communiquant avec la chambre de soufflage et fermée par un piston.The present invention relates to a self-blowing circuit breaker comprising an envelope filled with a pressurized dielectric gas, two cooperating arcing contacts, one of which is part of a contact assembly mobile secured to an operating member and adapted to be moved axially in the envelope between a closed position and a position opening, the movable contact assembly comprising a first tube carrying its end the movable arcing contact and a second tube coaxial with the first tube, carrying at the end a permanent movable and delimiting contact, on both sides a crown connecting the first tube and the second tube, a blowing closed by a blowing nozzle and a compression chamber communicating with the blowing chamber and closed by a piston.

La demande de brevet FR 2 696 274 décrit un tel disjoncteur.Patent application FR 2 696 274 describes such a circuit breaker.

Selon ce document antérieur, le piston est semi-mobile et il est prévu un moyen pour immobiliser le piston pendant une première partie du déplacement de l'ensemble de contact mobile lors de l'ouverture du disjoncteur et un moyen pour, au contraire, entraíner axialement ce même piston au cours d'une seconde partie du déplacement de cet ensemble.According to this prior document, the piston is semi-mobile and there is provided a means for immobilizing the piston during a first part of the movement of the movable contact assembly when the circuit breaker opens and a means to, on the contrary, drive axially this same piston during a second part of the displacement of this set.

Le moyen pour entraíner axialement l'ensemble de contact mobile au cours de cette seconde partie du déplacement est constitué par un organe d'entraínement solidaire de l'ensemble de contact mobile qui entraíne une butée solidaire du piston. Cette butée est disposée sur le trajet de l'organe d'entraínement. Par ailleurs, au cours de la première partie du déplacement, le piston est maintenu en position fixe grâce à un ressort placé entre le piston et l'organe d'entraínement et poussant le piston qui est retenu par une couronne en butée contre un organe fixe, la couronne étant solidaire d'un tube lui-même solidaire du piston. Pendant cette première partie du déplacement, l'organe d'entraínement coulisse dans une lumière du tube liant le piston à la couronne jusqu'à arriver en butée en fin de lumière entraínant alors ensuite le piston dans la deuxième partie du déplacement.The means for axially driving the movable contact assembly to during this second part of the displacement is constituted by an organ drive integral with the movable contact assembly which causes a stop secured to the piston. This stop is arranged on the path of the organ training. In addition, during the first part of the trip, the piston is held in a fixed position by a spring placed between the piston and the drive member and pushing the piston which is retained by a crown in abutment against a fixed member, the crown being integral with a tube itself secured to the piston. During this first part of the displacement, the organ drive slides in a lumen of the tube connecting the piston to the crown until it comes to a stop at the end of the resulting light, then the piston in the second part of the trip.

Dans un tel agencement le ressort sollicitant le piston semi-mobile provoque un effort permanent sur la bielle de commande et entraíne une augmentation de l'énergie de manoeuvre nécessaire.In such an arrangement, the spring urging the semi-mobile piston causes a permanent effort on the control rod and causes a increase in the operating energy required.

Le document EP 0 126 929 décrit un interrupteur à gaz comprimé selon le préambule de la revendication 1 ayant une structure un peu différente dans le sens où il n'y a pas de second tube mais un piston annulaire 12, lié à un tube 8, porteur d'un contact de courant nominal 5 et coulissant directement dans un boítier cylindrique externe 14.EP 0 126 929 describes a compressed gas switch according to the preamble of claim 1 having a slightly different structure in the sense that there is no second tube but an annular piston 12, linked to a tube 8, carrying a nominal current contact 5 and sliding directly into an external cylindrical housing 14.

Cependant ce document décrit l'utilisation d'un piston libre coulissant 15 entre une butée 16 liée au boítier 14 et un ressort de poussée 17.However, this document describes the use of a sliding free piston 15 between a stop 16 linked to the housing 14 and a thrust spring 17.

Cette disposition assure le recul automatique du piston libre sous l'effet de l'augmentation de la pression dans la chambre de compression au moment de la manoeuvre d'ouverture et limite par le fait même l'augmentation de pression, elle apporte ainsi les avantages du piston semi-mobile du premier document cité en introduction mais sans que la bielle de commande ne soit soumise à un effort supplémentaire.This arrangement ensures the automatic recoil of the free piston under the effect increase in pressure in the compression chamber at the time of the opening maneuver and thereby limits the increase in pressure, it thus brings the advantages of the semi-mobile piston of the first document cited in the introduction but without the control rod being subject to additional effort.

Lorsque les contacts d'arc sont séparés et que le gaz de soufflage s'est échappé, la pression diminue et le piston libre revient alors à sa position contre ladite butée avant fixe sous la poussée du ressort de poussée.When the arcing contacts are separated and the blowing gas has escaped, the pressure decreases and the free piston then returns to its position against said front stop fixed under the thrust of the thrust spring.

Malheureusement, avec un tel piston libre, ce retour se produit avec une énergie cinétique non négligeable produisant un choc sur la butée avant fixe et les pièces d'attache de cette butée pouvant provoquer des ruptures.Unfortunately, with such a free piston, this return occurs with a significant kinetic energy producing a shock on the fixed front stop and the attachment parts of this stopper may cause ruptures.

L'invention a ainsi pour but de proposer un disjoncteur ayant une structure telle que définie en introduction, incorporant .un piston libre avec ses avantages mais palliant l'inconvénient cité ci-dessus.The object of the invention is therefore to propose a circuit breaker having a structure as defined in the introduction, incorporating a free piston with its advantages but overcoming the drawback mentioned above.

L'invention a ainsi pour objet un disjoncteur à auto-soufflage comprenant une enveloppe remplie d'un gaz diélectrique sous pression, deux contacts d'arc coopérant entre eux, l'un faisant partie d'un ensemble de contact mobile solidaire d'un organe de manoeuvre et adapté pour être déplacé axialement dans l'enveloppe entre une position de fermeture et une position d'ouverture, l'ensemble de contact mobile comprenant un premier tube portant à son extrémité le contact d'arc mobile et un second tube coaxial au premier tube, portant en extrémité un contact permanent mobile et délimitant, de part et d'autre d'une couronne reliant le premier tube et le second tube, une chambre de soufflage fermée par une buse de soufflage et une chambre de compression communiquant avec la chambre de soufflage et fermée par un piston, caractérisé en ce que ledit piston, annulaire et située entre les deux dits tubes est monté à coulissement libre entre une butée avant fixe et un ressort de poussée dont une extrémité prend appui sur le piston et dont l'autre extrémité est en appui fixe, cet appui fixe 18 étant situé de l'autre côté de ladite butée avant fixe par rapport aux dits contacts d'arc, ledit piston comprenant du côté opposé à l'appui du ressort de poussée, un évidement annulaire dans lequel est logée, en position d'appui du piston contre ladite butée avant, une bague, ladite bague étant montée flottante entre une rondelle fixe solidaire de ladite butée avant et un organe de retenu arrière et étant percée d'au moins un orifice, obturé par ladite rondelle fixe lorsqu'elle est en position de butée avant formant un clapet anti-retour permettant l'introduction de gaz dans ledit évidement lors du recul du piston sous la pression du gaz dans ladite chambre de compression lors d'une ouverture du disjoncteur, le mouvement avant de retour du piston sous la poussée dudit ressort de poussée étant amorti par le matelas de gaz comprimé par ladite bague pénétrant dans ledit évidement.The subject of the invention is therefore a self-blowing circuit breaker comprising an envelope filled with a dielectric gas under pressure, two arcing contacts cooperating with each other, one of which is part of a fixed mobile contact assembly an actuator and adapted to be moved axially in the envelope between a closed position and an open position, the movable contact assembly comprising a first tube carrying to its end of the movable arcing contact and a second tube coaxial with the first tube, carrying at the end a permanent movable and delimiting contact, on both sides a crown connecting the first tube and the second tube, a blowing closed by a blowing nozzle and a compression chamber communicating with the blowing chamber and closed by a piston, characterized in that said annular piston located between the two said tubes is mounted at free sliding between a fixed front stop and a thrust spring, one of which end is supported on the piston and whose other end is in fixed support, this fixed support 18 being located on the other side of said front stop fixed relative to said arcing contacts, said piston comprising on the side opposite the support of the spring thrust, an annular recess in which is housed, in the support position of the piston against said front stop, a ring, said ring being mounted floating between a fixed washer integral with said front stop and a retained at the rear and being pierced with at least one orifice, closed by said fixed washer when in the front stop position forming a non-return valve allowing the introduction of gas into said recess when the piston retreats under pressure gas in said compression chamber when the circuit breaker opens, the forward movement of the piston back under the thrust of said spring thrust being damped by the mattress of gas compressed by said penetrating ring in said recess.

D'autres caractéristiques de la présente invention ressortiront de la description d'un exemple de mise en oeuvre de l'invention faite ci-après en regard du dessin annexé dans lequel :Other features of the present invention will become apparent from the description of an example of implementation of the invention given below in look at the attached drawing in which:

Les figures 1 à 6 représentent partiellement un disjoncteur selon l'invention dans ses différentes positions au cours d'une manoeuvre d'ouverture, depuis l'état fermé figure 1 jusqu'à l'ouverture complète figure 6.Figures 1 to 6 partially show a circuit breaker according to the invention in its different positions during an opening maneuver, from the closed state in figure 1 to the complete opening in figure 6.

La figure 7 est une vue agrandie d'un détail des figures précédentes montrant le piston avec son évidement et la bague, permettant un amortissement lors du retour du piston.Figure 7 is an enlarged view of a detail of the previous figures showing the piston with its recess and the ring, allowing damping when the piston returns.

Dans ce quit suit, il est décrit à titre d'exemple un disjoncteur comprenant pour chaque phase une enveloppe isolante. Bien entendu, l'invention s'applique également aux disjoncteurs à enveloppe métallique à la terre comprenant une enveloppe distincte pour chaque phase ou une enveloppe unique pour les trois phases.In what follows, a circuit breaker comprising an example is described. for each phase an insulating envelope. Of course, the invention applies also to earthed metal casing circuit breakers comprising a separate envelope for each phase or a single envelope for all three phases.

En se référant à la figure 1, la référence 1 désigne une enveloppe isolante, de préférence en porcelaine, délimitant une chambre d'expansion 2 remplie d'un gaz à bonnes propriétés diélectriques, par exemple de l'hexafluorure de soufre sous une pression de quelques bars.Referring to Figure 1, reference 1 designates an envelope insulating, preferably porcelain, delimiting an expansion chamber 2 filled with a gas having good dielectric properties, for example hexafluoride of sulfur under a pressure of a few bars.

Le disjoncteur comprend un ensemble fixe et un ensemble de contact mobile.The circuit breaker includes a fixed assembly and a contact assembly mobile.

L'ensemble fixe comprend un contact d'arc 3 et un contact permanent fixe constitué d'une série circulaire de doigts 4. Ces contacts fixes d'arc 3 et permanent 4 sont liés à une première prise de courant 5.The fixed assembly includes an arcing contact 3 and a permanent contact fixed consisting of a circular series of fingers 4. These fixed arcing contacts 3 and permanent 4 are linked to a first socket 5.

L'ensemble de contact mobile comprend une pièce de manoeuvre 6 isolante traversant la chambre 2 et reliée, à l'une de ses extrémités, à un mécanisme non représenté. Son autre extrémité est liée à un ensemble métallique de contacts mobiles comprenant deux tubes coaxiaux 7 et 8. Ces deux tubes 7 et 8 sont reliés entre eux par une couronne métallique 9. Le tube interne 7 porte le contact d'arc mobile 10 et le tube externe 8 porte le contact permanent mobile 11 qui coopère, en position fermée du disjoncteur tel que représenté figure 1, par sa périphérie externe avec les doigts 4 du contact permanent fixe. Au contact mobile permanent tubulaire 11 est liée une buse de soufflage 12 en matériau isolant.The movable contact assembly includes an operating part 6 insulation passing through chamber 2 and connected, at one of its ends, to a mechanism not shown. Its other end is linked to a whole metal of movable contacts comprising two coaxial tubes 7 and 8. These two tubes 7 and 8 are interconnected by a metal crown 9. The tube internal 7 carries the movable arcing contact 10 and the external tube 8 carries the contact mobile permanent 11 which cooperates, in the closed position of the circuit breaker such that shown in Figure 1, by its outer periphery with the fingers 4 of the contact permanent fixed. To the tubular permanent movable contact 11 is linked a nozzle blowing 12 made of insulating material.

L'espace situé entre le contact mobile permanent 11, le contact d'arc mobile 10, la couronne 9 et la buse de soufflage 12 constitue une chambre de soufflage 13. Par ailleurs les tubes 7 et 8, un piston annulaire 14 situé entre les deux tubes, et la couronne métallique 9 délimitent une chambre de compression 15. Cette chambre de compression 15 est séparée de la chambre de soufflage 13 par la couronne métallique 9 équipée de clapets unidirectionnels 16 autorisant le passage du gaz de la chambre de compression 15 vers la chambre de soufflage 13.The space between the permanent movable contact 11, the arcing contact mobile 10, the crown 9 and the blowing nozzle 12 constitutes a blowing 13. Furthermore, the tubes 7 and 8, an annular piston 14 located between the two tubes, and the metal crown 9 define a compression chamber 15. This compression chamber 15 is separated from the blowing chamber 13 by the metal crown 9 fitted with one-way valves 16 authorizing the passage of gas from the compression chamber 15 to the blowing 13.

Des doigts 17 de contact permanent, liés à une plaque de fond 18 reliée à une seconde prise de courant non représentée, sont en contact électrique glissant avec le tube externe 8.Permanent contact fingers 17, linked to a bottom plate 18 connected to a second outlet not shown, are in electrical contact sliding with the outer tube 8.

Le piston annulaire 14 est monté à coulissement libre entre une butée avant fixe et un ressort de poussée 19 dont une extrémité prend appui sur le piston et l'autre contre la plaque de fond fixe 18.The annular piston 14 is mounted to slide freely between a stop fixed front and a thrust spring 19, one end of which bears on the piston and the other against the fixed bottom plate 18.

Le piston annulaire 14 coulisse également le long de trois tirants fixes 20 (un seul est visible sur les figures) dont la tête 21 sert de butée avant fixe pour le piston 14. Les tirants fixes 20 sont fixés à un manchon fixe 22 lié à la plaque de fond 18. Ce manchon 22 guide le ressort 19.The annular piston 14 also slides along three fixed tie rods 20 (only one is visible in the figures) whose head 21 serves as a fixed front stop for the piston 14. The fixed tie rods 20 are fixed to a fixed sleeve 22 linked to the plate bottom 18. This sleeve 22 guides the spring 19.

En se référant maintenant à la figure 7 on va décrire plus en détail le piston 14 et les moyens utilisés pour assurer un amortissement du choc provoqué par le retour vers l'avant du piston sous l'action du ressort 19 à la fin de l'ouverture du disjoncteur alors que la pression dans la chambre de compression 15 a chuté.Referring now to Figure 7 we will describe in more detail the piston 14 and the means used to ensure shock absorption caused by the return towards the front of the piston under the action of the spring 19 at the end of opening of the circuit breaker while the pressure in the compression chamber 15 fell.

Le piston 14 est équipé d'un clapet 23 permettant le passage du gaz de la chambre d'expansion 2 vers la chambre de compression 15 et non dans le sens inverse. Il comprend en outre un évidement annulaire 24 bien visible sur les figures 3, 4 et 5. En position de repos du disjoncteur, lorsqu'il est fermé ou complètement ouvert, comme représenté figure 1, 6 et dans la position représentée du piston par rapport aux tirants 20 figure 7, une bague flottante 25 est logée au fond de cet évidement 24, poussée par le piston contre une rondelle fixe 26, elle-même en appui contre la tête 21 des tirants 20.The piston 14 is equipped with a valve 23 allowing the passage of the gas from the expansion chamber 2 towards the compression chamber 15 and not in the reverse. It also includes an annular recess 24 clearly visible on the Figures 3, 4 and 5. In the breaker rest position, when closed or fully open, as shown in figure 1, 6 and in the position represented by the piston with respect to the tie rods 20 in FIG. 7, a floating ring 25 is housed at the bottom of this recess 24, pushed by the piston against a washer fixed 26, itself pressing against the head 21 of the tie rods 20.

La bague flottante 25 est percée de trois trous à 120° pour le passage des tirants et également d'orifices 27 intercalés entre les trous de passage des tirants 20. La bague flottante 25 est montée entre la rondelle fixe 26 et un organe de retenu arrière 28 constituant une collerette d'un canon 29. Ce canon 29 est immobilisé axialement sur le tirant 20 par un épaulement 30 du tirant et par la tête 21 du tirant 20. La tête 21 est en réalité une tête de vis venant serrer la rondelle fixe 26 et le canon 29 contre l'épaulement 30 du tirant 20.The floating ring 25 is pierced with three 120 ° holes for the passage tie rods and also orifices 27 interposed between the through holes of the tie rods 20. The floating ring 25 is mounted between the fixed washer 26 and a member rear retainer 28 constituting a flange of a barrel 29. This barrel 29 is immobilized axially on the tie rod 20 by a shoulder 30 of the tie rod and by the head 21 of the tie rod 20. The head 21 is actually a screw head tightening the fixed washer 26 and barrel 29 against the shoulder 30 of the tie rod 20.

Pour permettre à la bague flottante 25 de se déplacer axialement entre la rondelle 26 et la collerette 28 du canon 29, elle comporte un évidement 31 autour de chaque tirant 20 qui la traverse. Cet évidement étant situé du côté de la collerette 28.To allow the floating ring 25 to move axially between the washer 26 and the collar 28 of the barrel 29, it has a recess 31 around of each tie 20 passing through it. This recess being located on the side of the flange 28.

Dans la position représentée figures 1, 5, 6 et 7, les trois orifices 27 sont obturés par la rondelle 26.In the position shown in FIGS. 1, 5, 6 and 7, the three orifices 27 are closed by the washer 26.

En revanche, lors du recul du piston 14 (figure 2), lors de la montée en pression de la chambre de compression 15 dû au déplacement vers la droite de l'équipage mobile 6 à 11, la bague flottante vient en appui contre la collerette 28 libérant les orifices 27 et permettant l'introduction du gaz dans l'évidement 24 (figure 3) tandis que le piston 14 continue à reculer.On the other hand, during the retraction of the piston 14 (FIG. 2), during the rise in pressure of the compression chamber 15 due to the rightward displacement of the moving element 6 to 11, the floating ring bears against the flange 28 freeing the orifices 27 and allowing the introduction of the gas into the recess 24 (Figure 3) while the piston 14 continues to reverse.

En figure 4, on est en position de recul complet du piston.In Figure 4, we are in the complete recoil position of the piston.

En figure 5, le disjoncteur est ouvert, le gaz s'est échappé dans la chambre d'expansion 2 et la pression a brutalement chuté dans la chambre de compression 15, le piston, sous l'effet du ressort 19 revient brutalement en avant mais dès que la bague flottante 25 pénètre dans l'évidement 24, elle est repoussée contre la rondelle fixe 26 obturant les orifices 27 et le matelas de gaz contenu dans l'évidement 24 amorti fortement la fin du mouvement de retour du piston contre la bague 25, en appui contre la rondelle 26 et celle-ci contre les têtes 21 des tirants 20 (figure 6).In Figure 5, the circuit breaker is open, the gas has escaped into the expansion chamber 2 and the pressure suddenly dropped in the compression 15, the piston, under the effect of the spring 19 suddenly returns forward but as soon as the floating ring 25 enters the recess 24, it is pushed against the fixed washer 26 closing the orifices 27 and the gas mattress contained in the recess 24 strongly damped the end of the return movement of the piston against the ring 25, pressing against the washer 26 and the latter against the heads 21 of tie rods 20 (Figure 6).

Claims (2)

  1. Gas-blast circuit-breaker including a jacket (1) filled with a pressurized dielectric gas, two cooperating arc contacts (3, 10), one (10) of which is part of a mobile contact assembly attached to an operating member (6) and adapted to be displaced axially in the jacket between a closed position and an open position, the mobile contact assembly including a first tube (7) carrying the mobile arc contact (10) at its end and a second tube (8) coaxial with the first tube, carrying a mobile permanent contact (11) at its end and delimiting, on respective opposite sides of a ring (9) joining the first tube (7) and the second tube (8), a gas-blast chamber (13) closed by a gas-blast nozzle (12) and a compression chamber (15) communicating with the gas-blast chamber (13) and closed by a piston (14), characterized in that said piston (14) is annular and disposed between said two tubes (7, 8) and is freely slidable between a fixed front stop (21) and a compression spring (19) one end of which bears on the piston (14) and the other end of which has a fixed bearing point (18) on the opposite side of said fixed front stop (21) from said arc contacts (3, 10), said piston having on the side opposite that on which the compression spring (19) bears an annular recess (24) in which a ring (25) is housed in the position with the piston bearing against said front stop, said ring floating between a fixed washer (26) attached to said front stop (21) and a rear retaining member (28) and having at least one orifice (27) in it blocked by said fixed washer (26) when it is in a front abutment position, thereby forming a check valve enabling introduction of gas into said recess (24) on withdrawal of the piston due to the pressure of the gas in said compression chamber (15) during opening of the circuit-breaker, the return movement of the piston towards the front due to the thrust of said compression spring (19) being damped by the gas cushion compressed by said ring (25) entering said recess.
  2. The circuit-breaker according to claim 1 characterized in that said piston (14) slides on fixed tie-rods (20) connected to said fixed bearing point (18) of the compression spring (19) and the head (21) of which provides a fixed front stop for said piston (14) and in that said rear retaining member (28) for said floating ring (25) is situated on each tie-rod (20).
EP97401034A 1996-05-13 1997-05-07 High-voltage gas-blast puffer type circuit-breaker Expired - Lifetime EP0807946B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9605912A FR2748598B1 (en) 1996-05-13 1996-05-13 HIGH-VOLTAGE SELF-BLOWING CIRCUIT BREAKER
FR9605912 1996-05-13

Publications (2)

Publication Number Publication Date
EP0807946A1 EP0807946A1 (en) 1997-11-19
EP0807946B1 true EP0807946B1 (en) 2001-12-12

Family

ID=9492067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97401034A Expired - Lifetime EP0807946B1 (en) 1996-05-13 1997-05-07 High-voltage gas-blast puffer type circuit-breaker

Country Status (7)

Country Link
US (1) US5898150A (en)
EP (1) EP0807946B1 (en)
DE (1) DE69708966T2 (en)
EG (1) EG21480A (en)
ES (1) ES2167691T3 (en)
FR (1) FR2748598B1 (en)
PT (1) PT807946E (en)

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Publication number Priority date Publication date Assignee Title
JP4174094B2 (en) * 1998-01-29 2008-10-29 株式会社東芝 Gas circuit breaker
US6310311B1 (en) * 1999-08-05 2001-10-30 Gary Hakes Integrated bushing component
FR2799571B1 (en) * 1999-10-07 2001-12-21 Schneider Electric High Voltag SELF-EXPANSION BREAKER WITH PRESSURE AND FILLING VALVE
FR2808618B1 (en) * 2000-05-03 2002-06-14 Alstom CIRCUIT BREAKER COMPRISING, IN AN ENCLOSURE FILLED WITH A PRESSURIZED DIELECTRIC GAS, A MOBILE ASSEMBLY
EP1675145A1 (en) * 2004-12-23 2006-06-28 ABB Technology AG High power circuit breaker with sealing against hot arcing gasses
FR2892851B1 (en) * 2005-11-03 2013-12-06 Areva T & D Sa CURRENT CURRENT CHAMBER WITH DOUBLE COMPRESSION CHAMBER
FR2922043B1 (en) * 2007-10-03 2009-12-11 Areva T & D Sa BREAKER BREAKER CHAMBER WITH DOUBLE VOLUME OF COMPRESSION
KR101013709B1 (en) * 2008-12-03 2011-02-10 엘에스산전 주식회사 High-speed closing switch in power distributor
KR101309317B1 (en) * 2009-09-10 2013-09-30 엘에스산전 주식회사 Valve for gas circuit breaker and a gas circuit breaker with the same
EP2343721A1 (en) * 2010-01-06 2011-07-13 ABB Research Ltd. Gas-isolated high voltage switch
CN102592876B (en) * 2012-03-01 2014-10-01 广东金晖隆开关有限公司 Air blowing arc extinguishing load switch
HUE052765T2 (en) * 2016-08-26 2021-05-28 Abb Power Grids Switzerland Ag Switch and method for disconnecting a switch
CN111199849B (en) * 2019-12-26 2021-12-17 河南平高电气股份有限公司 Moving contact assembly of arc extinguish chamber and moving contact assembly using same

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DE3127678A1 (en) * 1981-07-14 1983-02-10 BBC Aktiengesellschaft Brown, Boveri & Cie., 5401 Baden, Aargau HIGH VOLTAGE CIRCUIT BREAKERS
DE3141324C2 (en) * 1981-10-17 1986-02-06 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau Circuit breaker
SE432321B (en) * 1982-08-16 1984-03-26 Asea Ab ELECTRICAL SWITCH WITH GASFUL EXTENSION
DE3322597A1 (en) * 1983-05-31 1984-12-06 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau EXHAUST GAS SWITCH
US4609798A (en) * 1984-07-27 1986-09-02 Alsthom Means for assembling two enclosures of an electrical cutout apparatus
FR2638564B1 (en) * 1988-11-02 1990-11-30 Alsthom Gec HIGH VOLTAGE CIRCUIT BREAKER WITH DIELECTRIC GAS UNDER PRESSURE
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FR2696274B1 (en) * 1992-09-29 1994-11-04 Alsthom Gec Self-blowing high voltage circuit breaker having a reduced gas compression interrupting chamber.
AU5323201A (en) * 2000-04-05 2001-10-23 Ods Properties Inc Systems and methods for recognizing preferred wagerers

Also Published As

Publication number Publication date
PT807946E (en) 2002-05-31
DE69708966T2 (en) 2002-08-01
ES2167691T3 (en) 2002-05-16
EP0807946A1 (en) 1997-11-19
US5898150A (en) 1999-04-27
DE69708966D1 (en) 2002-01-24
EG21480A (en) 2001-11-28
FR2748598B1 (en) 1998-06-05
FR2748598A1 (en) 1997-11-14

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