EP0378950A1 - Pole for puffer-type electrical circuit breaker - Google Patents

Pole for puffer-type electrical circuit breaker Download PDF

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Publication number
EP0378950A1
EP0378950A1 EP89420486A EP89420486A EP0378950A1 EP 0378950 A1 EP0378950 A1 EP 0378950A1 EP 89420486 A EP89420486 A EP 89420486A EP 89420486 A EP89420486 A EP 89420486A EP 0378950 A1 EP0378950 A1 EP 0378950A1
Authority
EP
European Patent Office
Prior art keywords
envelope
injected
piston
pole
pole according
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
EP89420486A
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German (de)
French (fr)
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EP0378950B1 (en
Inventor
Denis Raphard
Maurice Perrin
Laurent Besnard
Jean-Yves Blanc
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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Publication date
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Publication of EP0378950A1 publication Critical patent/EP0378950A1/en
Application granted granted Critical
Publication of EP0378950B1 publication Critical patent/EP0378950B1/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
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

  • the invention relates to a pole of a medium-voltage circuit breaker with self-blowing by piston of a gas with high dielectric strength, comprising a sealed insulating envelope of generally cylindrical shape filled with said gas, in which a fixed contact are arranged coaxially and a movable contact, the latter being slidably mounted and carrying a piston, confining with a transverse partition of subdivision of said envelope a pistonable compression volume of the arc blowing gas, drawn during the separation of said contacts.
  • a self-blowing electric circuit breaker constituted by the assembly of several poles of the kind mentioned, allows the cutting of medium voltage currents by simple actuation of a control shaft.
  • Each pole has an insulating molded enclosure in the form of a pocket closed on the side of the open bottom with a metallic or insulating cover.
  • the structure and arrangement of these known poles are complicated and require a long assembly and manufacturing time. In particular, guiding the movable contact rod by a series of V-grooved rollers is complicated and expensive.
  • the present invention aims to allow the realization of a simplified structure pole using injected parts, connected by simple snap.
  • the pole according to the invention is characterized in that said transverse partition is constituted by a piece of injected insulating plastic material introduced with low clearance, and kept fixed in said envelope, said piece having a central orifice for passage of said movable contact, which is guided by said part and gas passage orifices fitted with one-way valves, to allow free entry of gas into the pistonable volume through said partition, and to prevent gas from escaping from said volume in the opposite direction to through said passage openings.
  • the injected part constituting the transverse partition which subdivides the envelope into two chambers, has orifices for the passage of gases open during the phase of closing the pole, so as not to slow down the moving assembly in its closing movement. These orifices are closed by a valve in the form of an annular disc during the pole opening phase corresponding to compression of the blowing gas in the pistonable volume.
  • the annular disc forming the valve is interposed with clearance, between the injected part forming the partition and a retaining ring clipped onto this injected part.
  • the seal between the transverse partition and the pole shell is ensured by a seal, in particular an O-ring placed on the circumference of the injected part and maintained by the retaining ring also cooperating with the valve disc.
  • the injected part forming the transverse partition can be introduced into the pole through the open bottom, its immobilization in rotation being ensured by a lug sliding in a longitudinal groove formed in the internal wall of the envelope.
  • the positioning of the injected part in the longitudinal direction is ensured on the one hand by a step formed on the internal wall of the envelope, and on the other hand by a current supply insert embedded transversely in the envelope and carrying a connection screw of a braid, which projects towards the inside of the envelope to serve as a retaining stop for the injected part.
  • the blowing piston integral with the movable contact is also made of injected plastic and it carries a blowing nozzle snapped onto the piston.
  • a scraper ring in the form of a split ring is inserted into a circumferential groove of the piston to ensure sealing between the latter and the envelope of the pole.
  • the rigid part forming the intermediate partition guides the movable contact rod, and the current supply to this contact rod is advantageously produced by a braid.
  • this braid extends in a plane transverse to the pole by being, on the one hand connected to an insert forming a current feedthrough, embedded in the insulating envelope, and on the other hand to the movable contact rod.
  • the connection of the braid to the movable contact rod is made at a point diametrically opposite the point of attachment of the braid to the current feedthrough.
  • the braid preferably constitutes two current supply loops, symmetrically surrounding the movable contact so as to limit the section of the braid.
  • the braid is preferably subdivided into different strands superimposed in the axial direction of the pole, in order to limit its rigidity in this direction.
  • This arrangement of the braid in a transverse plane allows a reduction in height of the pole due to the limitation of the movement of this braid.
  • the fixing screw of the braid to the lateral crossing simultaneously ensures the longitudinal positioning of the injected part forming the transverse partition.
  • the screw for fixing the braid to the movable contact rod can at the same time ensure the articulation of the rod for controlling the movement of the movable contact.
  • an envelope 10 of insulating material in the form of a pocket is closed off with a waterproof material on the side of its open bottom, by a plate 12.
  • the enclosure confined by the envelope 10 is filled with a gas at high dielectric strength, in particular sulfur hexafluoride and two metal inserts are embedded in the wall of the envelope 10 of generally cylindrical shape, one 14 crossing the bottom of the pocket constituting the envelope 10 and extending into the direction axial of the casing 10 by a fixed tubular contact 16.
  • the other insert 18 extends transversely to the casing 10, being offset from the side of the cover 12.
  • the two inserts 14, 18 constitute feedthroughs of current forming the input and the output of the pole housed in the envelope 10.
  • the envelope 10 is crossed by a control shaft 20 on which is cranked a crank 22 controlling a link 24 articulated on a movable contact rod 26.
  • the movable contact rod 26 carries at its end oriented on the side of the fixed contact 16, tulip-shaped main contacts 28, as well as a semifixed arcing contact 30 biased by a spring 32 in the projecting position of the contact fingers of the tulip 28.
  • the movable contact rod 26 crosses a transverse partition 34 with little play, dividing the casing 10 into two chambers, one for cutting the arc drawn during the separation of the contacts 16.30, and the another of cut-off gas expansion.
  • the transverse partition 34 confines with a piston 36 secured to the end of the movable contact rod 26, a pistonable volume ensuring during a movement of opening of the pole a compression of the gas, and a flow of this gas of the volume pistonable through a blowing nozzle 38 fixed to the piston 36.
  • the opening and closing of the pole are controlled by a rotation of the control shaft 20 which generates a sliding of the movable assembly constituted by the movable contact rod 26 and the piston 36.
  • Such a pole is well known to specialists and suffice it to remember that it requires no external source of compressed arc blowing gases, and allows operation for many years without maintenance, in particular without dismantling. of the pole.
  • the blowing piston 36 comprises a piece 40 of injected plastic material of generally circular shape, having on its upper face a cylindrical housing in which the base 42 of the nozzle 38.
  • the nozzle 38 is assembled to the injected part 40 by simple snap-fastening and it is held by retaining hooks 44 coming from injection with the part 40.
  • the part 40 has orifices 46 putting in communication the interior of the nozzle 38 and the opposite side of the piston 36.
  • the seal between the piston 36 and the casing 10 is ensured by a scraper ring 48 in the form of a split ring coming to be housed in a circumferential groove 50 of the part injected 40.
  • the mounting of the piston 36 is particularly simple, since it suffices to set up the scraper seal 48 and to snap on the nozzle 38. This ease of assembly is due to the possibility of producing by injection pieces of suitable shapes .
  • the transverse partition 34 ensuring the subdivision of the casing 10 into two chambers.
  • the transverse partition 34 is also constituted by a piece of injected plastic material 52 of generally cylindrical shape.
  • the injected part 52 has a central part 54 forming a passage and guide orifice for the movable contact rod 26 which passes through it.
  • the orifice 54 extends over a certain axial height to ensure correct guiding of the contact rod 26.
  • the injected part 52 is extended by a cylindrical skirt 56 closely fitting the envelope 10 to ensure perfect positioning of the transverse partition 34 in the casing 10.
  • the rotational positioning of this injected part 52 is obtained by the penetration of a lug 58 projecting from the side, in a conjugate longitudinal groove (not shown) formed in the wall internal of the envelope 10.
  • the upper part of the injected part 52 offers an internal circular housing 60 in which a disc-shaped valve 62 is fitted, capable of covering orifices 64 through which the transverse partition 34 passes.
  • a ring retaining 66 can be fitted or optionally clipped into the housing 60 to hold the valve disc 62.
  • the retaining ring 66 has an external flange 68 which cooperates with a conjugate rim 70 of the injected part 52 to delimit a circumferential groove for housing an O-ring seal 72.
  • the orifices 64 extend in arcs of a circle to provide a significant section for passage of gas while being susceptible to '' be closed by the valve disc 62 of annular shape during the gas compression phase in the pistonable volume.
  • the assembly and installation of the transverse partition 34 are particularly simple, since it suffices to have the gasket 72 and the valve disc 62 before fitting the retaining ring 66. This assembly is then threaded into the 'envelope 10 taking care to introduce the lug 58 in the conjugate groove.
  • the upper edge of the retaining ring 66 comes into abutment with a step 74 formed in the internal wall of the envelope 10. This step 74 limits the axial movement of the transverse partition 34 in the direction of the fixed contact 16. The movement in the opposite direction is limited by a plate 79 itself secured to the braid 78 and held in place by a screw 76 screwed into the transverse insert 18.
  • step 74 and the plate 79 immobilize the transverse partition 34 in the axial direction, keeping the retaining ring 66 engaged in its housing 60.
  • the immobilization in rotation of this transverse partition 34 is ensured by the lug 58, and the height axial of the assembly ensures perfect positioning of the injected part 52 which guides the sliding contact movable rod 26.
  • the electrical connection between the movable contact rod 26 and the transverse insert 18 is made by a flexible braid 78 extending in the form of two half-loops in a plane transverse to the envelope 10 (FIG. 7).
  • the two half-loops of the braid 78 surround on either side, the movable contact rod 26 while being by one of their ends secured to the metal insert 18 by a screw which is advantageously the positioning screw 76 axial of the transverse partition 34.
  • the opposite end of the half-loops of the braid 78 is connected to the movable contact rod 26 by a screw diametrically opposite the screw 76.
  • the length of the braid 78 is sufficient to extend near the casing 10 over a length sufficient for an axial clearance of the contact rod 26.
  • the braid 78 is made up of several strands superimposed in the axial direction of the pole to ensure a certain flexibility in this axial direction.
  • the braid 78 In the intermediate position of the movable contact rod 26, the braid 78 extends substantially in a diametrical plane containing the insert 18, the upward and downward movement being effected during a sliding of the rod. movable contact 26 on either side of this diametrical plane.
  • the braid 78 In the extreme position, the braid 78 extends in a slightly inclined plane, the length of this braid being sufficient to compensate for the increase in the distance between the fixing screws 76 and 80.
  • This transverse arrangement of the braid 78 limits its height the space required to accommodate the braid 78, and allows a shortening of the circuit breaker pole.
  • the connection screw 80 of the braid 78 to the contact rod 26 advantageously constitutes the axis of attachment and articulation of the rod 24. A second screw can be superimposed when using a braid of relatively large height .
  • the attachment of the piston 36 to the movable contact rod 26 can be carried out in different ways, a particularly simple manner consisting in providing on the end of the rod 26 a flange on which the injected part 40 fits.
  • the holding in position nested can be easily achieved by the establishment of the main tulip contact fingers 28 which extend laterally from the movable contact rod 26 to overlap on the injected part 40. Any other method of attachment is of course usable.
  • the envelope 10 is preferably of a well known per se in an epoxy resin.
  • Figures 8 and 9 illustrate an alternative embodiment of the snap fastening of the nozzle 38 on the injected part 40.
  • the nozzle 38 carries teeth 82 which snap on legs 84 in the form of a stirrup carried by the part injected 40.
  • FIGS. 10 to 12 show an attachment by means of a ring 88.
  • the nozzle 38 carries a circumferential collar 94 in the vicinity of its base 42 and the injected part 40 has nozzles 90 fixing on which comes to fit and fix the ring 88, which is supported on the collar 94.
  • the ring 88 comprises opposite each spout 90 an orifice 98 in bayonet whose enlarged part 96 allows the fitting of the ring on the spout 90 and whose narrow part 98 allows pivoting the passage over the spout 90 and the fixing of the ring 88 and of the nozzle 38 on the injected part 40.

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  • Circuit Breakers (AREA)
  • Breakers (AREA)

Abstract

One pole of an electrical puffer-type circuit-breaker comprises a transverse partition (34) made of an injected insulating plastic which simultaneously provides for the guiding of the moving contact rod which passes through it. The injected plastic part carries an O-ring providing the sealing with the surround (10) and a one-way shutter for closing off through-orifices which is made in the transverse partition. The puffer piston integral with the moving contact rod (32) is also made of an injected plastic and it includes means for housing and snap-fitting the puffer nozzle (38) fixedly to the piston (36). A scraper seal (58) in the shape of a split segment is housed in a circumferential groove made in the injected part (40) of the piston (36). …<??>Electrical connection between the moving contact rod (26) and a current-intake insert (18) is effected by a braid extending in the shape of a semi-loop in a plane transverse to the pole. …<IMAGE>…

Description

L'invention est relative à un pôle d'un disjoncteur moyenne tension à autosoufflage par pistonnage d'un gaz à rigidité diélectrique élevée, comprenant une enveloppe étanche isolante de forme générale cylindrique remplie par ledit gaz, dans laquelle sont disposés coaxialement un contact fixe et un contact mobile, ce dernier étant monté à coulissement et portant un piston, confinant avec une cloison transversale de subdivision de ladite enveloppe un volume pistonnable de compression du gaz de soufflage de l'arc, tiré lors de la séparation desdits contacts.The invention relates to a pole of a medium-voltage circuit breaker with self-blowing by piston of a gas with high dielectric strength, comprising a sealed insulating envelope of generally cylindrical shape filled with said gas, in which a fixed contact are arranged coaxially and a movable contact, the latter being slidably mounted and carrying a piston, confining with a transverse partition of subdivision of said envelope a pistonable compression volume of the arc blowing gas, drawn during the separation of said contacts.

Un disjoncteur électrique à autosoufflage constitué par l'assemblage de plusieurs pôles du genre mentionné, permet la coupure de courants moyenne tension par simple actionnement d'un arbre de commande. Chaque pôle comporte une enceinte moulée isolante en forme de poche obturée du côté du fond ouvert par un couvercle métallique ou isolant. La structure et l'agencement de ces pôles connus sont compliqués et nécessitent un temps de montage et de fabrication élevé. En particulier le guidage de la tige de contact mobile par une série de galets à gorge en V est compliqué et coûteux.A self-blowing electric circuit breaker constituted by the assembly of several poles of the kind mentioned, allows the cutting of medium voltage currents by simple actuation of a control shaft. Each pole has an insulating molded enclosure in the form of a pocket closed on the side of the open bottom with a metallic or insulating cover. The structure and arrangement of these known poles are complicated and require a long assembly and manufacturing time. In particular, guiding the movable contact rod by a series of V-grooved rollers is complicated and expensive.

La présente invention a pour but de permettre la réalisation d'un pôle de structure simplifiée faisant usage de pièces injectées, reliées par simple encliquetage.The present invention aims to allow the realization of a simplified structure pole using injected parts, connected by simple snap.

Le pôle selon l'invention est caractérisé en ce que ladite cloison transversale est constituée par une pièce en matière plastique injectée isolante introduite à faible jeu, et maintenue fixe dans ladite enveloppe, ladite pièce présentant un orifice central de passage dudit contact mobile, lequel est guidé par ladite pièce et des orifices de passage du gaz équipés de clapets unidirectionnels, pour autoriser une libre entrée de gaz dans le volume pistonnable à travers ladite cloison, et empêcher un échappement du gaz dudit volume en sens inverse à travers lesdits orifices de passage.The pole according to the invention is characterized in that said transverse partition is constituted by a piece of injected insulating plastic material introduced with low clearance, and kept fixed in said envelope, said piece having a central orifice for passage of said movable contact, which is guided by said part and gas passage orifices fitted with one-way valves, to allow free entry of gas into the pistonable volume through said partition, and to prevent gas from escaping from said volume in the opposite direction to through said passage openings.

La pièce injectée constituant la cloison transversale, qui subdivise l'enveloppe en deux chambres, comporte des orifices de passage des gaz ouverts pendant la phase de fermeture du pôle, afin de ne pas freîner l'équipage mobile dans son mouvement de fermeture. Ces orifices sont obturés par un clapet en forme de disque annulaire lors de la phase d'ouverture du pôle correspondant à une compression du gaz de soufflage dans le volume pistonnable. Le disque annulaire formant le clapet est intercalé avec jeu, entre la pièce injectée formant la cloison et une bague de retenue clipsée sur cette pièce injectée. L'étanchéité entre la cloison transversale et l'enveloppe du pôle est assurée par un joint, notamment torique disposé sur la circonférence de la pièce injectée et maintenue par la bague de retenue coopérant également avec le disque clapet. La pièce injectée formant la cloison transversale peut être introduite dans le pôle par le fond ouvert, son immobilisation en rotation étant assurée par un ergot coulissant dans une rainure longitudinale ménagée dans la paroi interne de l'enveloppe.The injected part constituting the transverse partition, which subdivides the envelope into two chambers, has orifices for the passage of gases open during the phase of closing the pole, so as not to slow down the moving assembly in its closing movement. These orifices are closed by a valve in the form of an annular disc during the pole opening phase corresponding to compression of the blowing gas in the pistonable volume. The annular disc forming the valve is interposed with clearance, between the injected part forming the partition and a retaining ring clipped onto this injected part. The seal between the transverse partition and the pole shell is ensured by a seal, in particular an O-ring placed on the circumference of the injected part and maintained by the retaining ring also cooperating with the valve disc. The injected part forming the transverse partition can be introduced into the pole through the open bottom, its immobilization in rotation being ensured by a lug sliding in a longitudinal groove formed in the internal wall of the envelope.

Le positionnement de la pièce injectée dans le sens longitudinal est assuré d'une part par un redan ménagé sur la paroi interne de l'enveloppe, et d'autre part par un insert d'amenée de courant noyé transversalement dans l'enveloppe et portant une vis de connexion d'une tresse, qui fait saillie vers l'intérieur de l'enveloppe pour servir de butée de retenue de la pièce injectée.The positioning of the injected part in the longitudinal direction is ensured on the one hand by a step formed on the internal wall of the envelope, and on the other hand by a current supply insert embedded transversely in the envelope and carrying a connection screw of a braid, which projects towards the inside of the envelope to serve as a retaining stop for the injected part.

Selon un développement de l'invention, le piston de soufflage solidaire du contact mobile est également réalisé en matière plastique injectée et il porte une buse de soufflage encliquetée sur le piston. Un segment racleur en forme de bague fendue est inséré dans une rainure circonférentielle du piston pour assurer l'étanchéité entre ce dernier et l'enveloppe du pôle.According to a development of the invention, the blowing piston integral with the movable contact is also made of injected plastic and it carries a blowing nozzle snapped onto the piston. A scraper ring in the form of a split ring is inserted into a circumferential groove of the piston to ensure sealing between the latter and the envelope of the pole.

La pièce rigide formant la cloison intermédiaire assure le guidage de la tige de contact mobile, et l'amenée de courant à cette tige de contact est avantageusement réalisée par une tresse. Selon un développement important de l'invention, cette tresse s'étend dans un plan transversal au pôle en étant, d'une part raccordée à un insert formant une traversée d'amenée de courant, noyé dans l'enveloppe isolante, et d'autre part à la tige de contact mobile. La connexion de la tresse à la tige de contact mobile s'effectue en un point diamétralement opposé au point de fixation de la tresse à la traversée d'amenée de courant. La tresse constitue de préférence deux boucles d'amenée de courant, entourant symétriquement le contact mobile de manière à limiter la section de la tresse. La tresse est de préférence subdivisée en différents brins superposés dans la direction axiale du pôle, afin de limiter sa rigidité dans cette direction. Cette disposition de la tresse dans un plan transversal permet une réduction en hauteur du pôle due à la limitation du débattement de cette tresse. La vis de fixation de la tresse à la traversée latérale assure simultanément le positionnement longitudinal de la pièce injectée formant la cloison transversale. La vis de fixation de la tresse à la tige de contact mobile peut en même temps assurer l'articulation de la biellette de commande de déplacement du contact mobile.The rigid part forming the intermediate partition guides the movable contact rod, and the current supply to this contact rod is advantageously produced by a braid. According to an important development of the invention, this braid extends in a plane transverse to the pole by being, on the one hand connected to an insert forming a current feedthrough, embedded in the insulating envelope, and on the other hand to the movable contact rod. The connection of the braid to the movable contact rod is made at a point diametrically opposite the point of attachment of the braid to the current feedthrough. The braid preferably constitutes two current supply loops, symmetrically surrounding the movable contact so as to limit the section of the braid. The braid is preferably subdivided into different strands superimposed in the axial direction of the pole, in order to limit its rigidity in this direction. This arrangement of the braid in a transverse plane allows a reduction in height of the pole due to the limitation of the movement of this braid. The fixing screw of the braid to the lateral crossing simultaneously ensures the longitudinal positioning of the injected part forming the transverse partition. The screw for fixing the braid to the movable contact rod can at the same time ensure the articulation of the rod for controlling the movement of the movable contact.

La suppression des galets de guidage et d'amenée de courant au contact mobile, ainsi que la réduction du nombre de pièces métalliques, logées dans l'enveloppe isolante, permettent une meilleure répartition des champs et une réduction en hauteur du pôle.The elimination of the guide rollers and current feed to the movable contact, as well as the reduction in the number of metal parts, housed in the insulating envelope, allow a better distribution of the fields and a reduction in height of the pole.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre, de différents modes de mise en oeuvre de l'invention donnés à titre d'exemples non limitatifs, et représentés aux dessins annexés dans lesquels:

  • - la figure 1 est une vue schématique en perspective partiellement arrachée, montrant un pôle selon l'invention, représenté en position ouvert;
  • - la figure 2 est une vue en coupe d'un piston de soufflage, portant une buse, du pôle selon la figure 1;
  • - la figure 3 est une vue à échelle agrandie et en coupe de la pièce injectée formant une cloison transversale selon la figure 1;
  • - la figure 4 est une vue analogue à celle de la figure 2, montrant la buse et le piston avant leur assemblage;
  • - la figure 5 est une vue analogue à celle de la figure 3 montrant le clapet et la bague d'étanchéité avant leur assemblage sur la pièce injectée;
  • - la figure 6 est une demi-vue selon les flèche F-F de la figure 5;
  • - la figure 7 est une coupe transversale du pôle selon la figure 1 au niveau de la traversée latérale d'amenée de courant.
  • - les figures 8 et 9 illustrent une variante de réalisation de la buse et du piston, représentés respectivement avant et après leur assemblage;
  • - les figures 10 et 11 sont des vues analogues aux figures 8 et 9 montrant une autre variante;
  • - la figure 12 est une demi-vue en plan de l'ensemble buse-piston selon la figure 11.
Other advantages and characteristics will emerge more clearly from the description which follows, of various embodiments of the invention given by way of nonlimiting examples, and represented in the appended drawings in which:
  • - Figure 1 is a schematic perspective view partially broken away, showing a pole according to the invention, shown in the open position;
  • - Figure 2 is a sectional view of a blowing piston, carrying a nozzle, of the pole according to Figure 1;
  • - Figure 3 is an enlarged view in section of the injected part forming a transverse partition according to Figure 1;
  • - Figure 4 is a view similar to that of Figure 2, showing the nozzle and the piston before their assembly;
  • - Figure 5 is a view similar to that of Figure 3 showing the valve and the sealing ring before their assembly on the injected part;
  • - Figure 6 is a half-view along the arrows FF of Figure 5;
  • - Figure 7 is a cross section of the pole according to Figure 1 at the lateral feed-through crossing.
  • - Figures 8 and 9 illustrate an alternative embodiment of the nozzle and the piston, shown respectively before and after their assembly;
  • - Figures 10 and 11 are views similar to Figures 8 and 9 showing another variant;
  • FIG. 12 is a half plan view of the nozzle-piston assembly according to FIG. 11.

Sur la figure 1, une enveloppe 10 en matière isolante en forme de poche est obturée d'un matière étanche du côté de son fond ouvert, par une plaque 12. L'enceinte confinée par l'enveloppe 10 est remplie d'un gaz à rigidité diélectrique élevée, notamment de l'hexafluorure de soufre et deux inserts métalliques sont noyés dans la paroi de l'enveloppe 10 de forme générale cylindrique, l'un 14 traversant le fond de la poche constituant l'enveloppe 10 et se prolongeant dans la direction axiale de l'enveloppe 10 par un contact fixe tubulaire 16. L'autre insert 18 s'étend transversalement à l'enveloppe 10, en étant décalé du côté du couvercle 12. Les deux inserts 14,18 constituent des traversées d'amenée de courant formant l'entrée et la sortie du pôle logé dans l'enveloppe 10. L'enveloppe 10 est traversée par un arbre de commande 20 sur lequel est clavetée une manivelle 22 commandant une biellette 24 articulée sur une tige de contact mobile 26. La tige de contact mobile 26 porte à son extrémité orientée du côté du contact fixe 16, des contacts principaux en forme de tulipe 28, ainsi qu'un contact d'arc semi­fixe 30 sollicité par un ressort 32 en position de saillie des doigts de contacts de la tulipe 28. La tige de contact mobile 26 traverse à faible jeu une cloison transversale 34 subdivisant l'enveloppe 10 en deux chambres, l'une de coupure de l'arc tiré lors de la séparation des contacts 16,30, et l'autre d'expansion des gaz de coupure. La cloison transversale 34, confine avec un piston 36 assujetti à l'extrémité de la tige de contact mobile 26, un volume pistonnable assurant lors d'un mouvement d'ouverture du pôle une compression du gaz, et un écoulement de ce gaz du volume pistonnable à travers une buse de soufflage 38 fixée au piston 36. L'ouverture et la fermeture du pôle sont commandées par une rotation de l'arbre de commande 20 qui engendre un coulissement de l'équipage mobile constitué par la tige de contact mobile 26 et le piston 36. Un tel pôle est bien connu des spécialistes et il suffit de rappeler qu'il ne nécessite aucune source extérieure de gaz comprimés de soufflage de l'arc, et permet un fonctionnement pendant de nombreuses années sans entretien, notamment sans démontage du pôle.In FIG. 1, an envelope 10 of insulating material in the form of a pocket is closed off with a waterproof material on the side of its open bottom, by a plate 12. The enclosure confined by the envelope 10 is filled with a gas at high dielectric strength, in particular sulfur hexafluoride and two metal inserts are embedded in the wall of the envelope 10 of generally cylindrical shape, one 14 crossing the bottom of the pocket constituting the envelope 10 and extending into the direction axial of the casing 10 by a fixed tubular contact 16. The other insert 18 extends transversely to the casing 10, being offset from the side of the cover 12. The two inserts 14, 18 constitute feedthroughs of current forming the input and the output of the pole housed in the envelope 10. The envelope 10 is crossed by a control shaft 20 on which is cranked a crank 22 controlling a link 24 articulated on a movable contact rod 26. The movable contact rod 26 carries at its end oriented on the side of the fixed contact 16, tulip-shaped main contacts 28, as well as a semifixed arcing contact 30 biased by a spring 32 in the projecting position of the contact fingers of the tulip 28. The movable contact rod 26 crosses a transverse partition 34 with little play, dividing the casing 10 into two chambers, one for cutting the arc drawn during the separation of the contacts 16.30, and the another of cut-off gas expansion. The transverse partition 34, confines with a piston 36 secured to the end of the movable contact rod 26, a pistonable volume ensuring during a movement of opening of the pole a compression of the gas, and a flow of this gas of the volume pistonable through a blowing nozzle 38 fixed to the piston 36. The opening and closing of the pole are controlled by a rotation of the control shaft 20 which generates a sliding of the movable assembly constituted by the movable contact rod 26 and the piston 36. Such a pole is well known to specialists and suffice it to remember that it requires no external source of compressed arc blowing gases, and allows operation for many years without maintenance, in particular without dismantling. of the pole.

En se référant plus particulièrement aux figures 2 et 4, on voit que le piston de soufflage 36 comporte une pièce 40 en matière plastique injectée de forme générale circulaire, présentant sur sa face supérieure un logement cylindrique dans lequel peut s'engager la base 42 de la buse 38. La buse 38 est assemblée à la pièce injectée 40 par simple encliquetage et elle est maintenue par des crochets de retenue 44 venant d'injection avec la pièce 40. La pièce 40 comporte des orifices 46 mettant en communication l'intérieur de la buse 38 et le côté opposé du piston 36. L'étanchéité entre le piston 36 et l'enveloppe 10 est assurée par un joint racleur 48 en forme de bague fendue venant se loger dans une rainure circonférentielle 50 de la pièce injectée 40. Le montage du piston 36 est particulièrement simple, puisqu'il suffit de mettre en place le joint racleur 48 et à encliqueter la buse 38. Cette facilité d'assemblage est due à la possibilité de réaliser par injection des pièces de formes appropriées.With particular reference to FIGS. 2 and 4, it can be seen that the blowing piston 36 comprises a piece 40 of injected plastic material of generally circular shape, having on its upper face a cylindrical housing in which the base 42 of the nozzle 38. The nozzle 38 is assembled to the injected part 40 by simple snap-fastening and it is held by retaining hooks 44 coming from injection with the part 40. The part 40 has orifices 46 putting in communication the interior of the nozzle 38 and the opposite side of the piston 36. The seal between the piston 36 and the casing 10 is ensured by a scraper ring 48 in the form of a split ring coming to be housed in a circumferential groove 50 of the part injected 40. The mounting of the piston 36 is particularly simple, since it suffices to set up the scraper seal 48 and to snap on the nozzle 38. This ease of assembly is due to the possibility of producing by injection pieces of suitable shapes .

En se référant plus particulièrement aux figures 3,5 et 6, on voit la cloison transversale 34 assurant la subdivision de l'enveloppe 10 en deux chambres. La cloison transversale 34 est également constituée par une pièce en matière plastique injectée 52 de forme générale cylindrique. La pièce injectée 52 comporte une partie centrale 54 formant un orifice de passage et de guidage de la tige de contact mobile 26 qui le traverse. L'orifice 54 s'étend sur une certaine hauteur axiale pour assurer le bon guidage de la tige de contact 26. A sa partie inférieure, la pièce injectée 52 est prolongée par une jupe cylindrique 56 épousant à faible jeu l'enveloppe 10 pour assurer un parfait positionnement de la cloison transversale 34 dans l'enveloppe 10. Le positionnement en rotation de cette pièce injectée 52 est obtenu par la pénétration d'un ergot 58 en saillie latérale, dans une rainure longitudinale conjuguée (non représentée) ménagée dans la paroi interne de l'enveloppe 10. La partie supérieure de la pièce injectée 52 offre un logement circulaire interne 60 dans lequel s'emboîte un clapet en forme de disque 62, susceptible de coiffer des orifices 64 de traversée de la cloison transversale 34. Une bague de retenue 66 peut être emboîtée ou éventuellement clipsée dans le logement 60 pour maintenir le disque clapet 62. La bague de retenue 66 présente un rebord externe 68 qui coopère avec un rebord conjugué 70 de la pièce injectée 52 pour délimiter une rainure circonférentielle de logement d'un joint torique d'étanchéité 72. Les orifices 64 s'étendent suivant des arcs de cercle pour offir une section notable de passage au gaz tout en étant susceptibles d'être obturés par le disque clapet 62 de forme annulaire pendant la phase de compression des gaz dans le volume pistonnable.Referring more particularly to Figures 3.5 and 6, we see the transverse partition 34 ensuring the subdivision of the casing 10 into two chambers. The transverse partition 34 is also constituted by a piece of injected plastic material 52 of generally cylindrical shape. The injected part 52 has a central part 54 forming a passage and guide orifice for the movable contact rod 26 which passes through it. The orifice 54 extends over a certain axial height to ensure correct guiding of the contact rod 26. At its lower part, the injected part 52 is extended by a cylindrical skirt 56 closely fitting the envelope 10 to ensure perfect positioning of the transverse partition 34 in the casing 10. The rotational positioning of this injected part 52 is obtained by the penetration of a lug 58 projecting from the side, in a conjugate longitudinal groove (not shown) formed in the wall internal of the envelope 10. The upper part of the injected part 52 offers an internal circular housing 60 in which a disc-shaped valve 62 is fitted, capable of covering orifices 64 through which the transverse partition 34 passes. A ring retaining 66 can be fitted or optionally clipped into the housing 60 to hold the valve disc 62. The retaining ring 66 has an external flange 68 which cooperates with a conjugate rim 70 of the injected part 52 to delimit a circumferential groove for housing an O-ring seal 72. The orifices 64 extend in arcs of a circle to provide a significant section for passage of gas while being susceptible to '' be closed by the valve disc 62 of annular shape during the gas compression phase in the pistonable volume.

Le montage et la mise en place de la cloison transversale 34 sont particulièrement simples, puisqu'il suffit de disposer le joint d'étanchéité 72 et le disque clapet 62 avant d'emboîter la bague de retenue 66. Cet ensemble est ensuite enfilé dans l'enveloppe 10 en prenant soin d'introduire l'ergot 58 dans la rainure conjuguée. En fin d'engagement de la cloison transversale 34, le bord supérieur de la bague de retenue 66 vient en butée d'un redan 74 ménagé dans la paroi interne de l'enveloppe 10. Ce redan 74 limite le déplacement axial de la cloison transversale 34 en direction du contact fixe 16. Le déplacement en direction inverse est limité par une plaquette 79 elle-même solidaire de la tresse 78 et tenue en place par une vis 76 vissée dans l'insert transversal 18. Il est facile de voir que le redan 74 et la plaquette 79 immobilisent dans le sens axial la cloison transversale 34, en maintenant la bague de retenue 66 engagée dans son logement 60. L'immobilisation en rotation de cette cloison transversale 34 est assurée par l'ergot 58, et la hauteur axial de l'ensemble assure un parfait positionnement de la pièce injectée 52 qui assure le guidage de la tige coulissante de contact mobile 26.The assembly and installation of the transverse partition 34 are particularly simple, since it suffices to have the gasket 72 and the valve disc 62 before fitting the retaining ring 66. This assembly is then threaded into the 'envelope 10 taking care to introduce the lug 58 in the conjugate groove. At the end of engagement of the transverse partition 34, the upper edge of the retaining ring 66 comes into abutment with a step 74 formed in the internal wall of the envelope 10. This step 74 limits the axial movement of the transverse partition 34 in the direction of the fixed contact 16. The movement in the opposite direction is limited by a plate 79 itself secured to the braid 78 and held in place by a screw 76 screwed into the transverse insert 18. It is easy to see that the step 74 and the plate 79 immobilize the transverse partition 34 in the axial direction, keeping the retaining ring 66 engaged in its housing 60. The immobilization in rotation of this transverse partition 34 is ensured by the lug 58, and the height axial of the assembly ensures perfect positioning of the injected part 52 which guides the sliding contact movable rod 26.

La connexion électrique entre la tige de contact mobile 26 et l'insert transversal 18, est réalisée par une tresse souple 78 s'étendant sous forme de deux demi-boucles dans un plan transversal à l'enveloppe 10 (figure 7). Les deux demi-boucles de la tresse 78 entourent de part et d'autre, la tige de contact mobile 26 en étant par l'une de leurs extrémités solidarisées à l'insert métallique 18 par une vis qui est avantageusement la vis 76 de positionnement axial de la cloison transversale 34. L'extrémité opposée des demi-boucles de la tresse 78 est raccordée à la tige de contact mobile 26 par une vis diamétralement opposée à la vis 76. La longueur de la tresse 78 est suffisante pour s'étendre à proximité de l'enveloppe 10 sur une longueur suffisante à un débattement axial de la tige de contact 26. En se référant plus particulièrement à la figure 1, on voit que la tresse 78 est constituée de plusieurs brins superposés dans la direction axiale du pôle pour assurer une certaine flexibilité suivant cette direction axiale. Dans la position intermédiaire de la tige de contact mobile 26, la tresse 78 s'étend sensiblement dans un plan diamètral contenant l'insert 18, le débattement vers le haut et vers le bas s'effectuant lors d'un coulissement de la tige de contact mobile 26 de part et d'autre de ce plan diamétral. En position extrème, la tresse 78 s'étend dans un plan faiblement incliné, la longueur de cette tresse étant suffisante pour compenser l'augmentation de la distance entre les vis de fixation 76 et 80. Cette disposition transversale de la tresse 78 limite en hauteur l'espace nécessaire au logement de la tresse 78, et permet un raccourcissement du pôle du disjoncteur. La vis de connexion 80 de la tresse 78 à la tige de contact 26 constitue avantageusement l'axe de fixation et d'articulation de la biellette 24. Une deuxième vis peut être superposée lors de l'emploi d'une tresse de hauteur relativement importante.The electrical connection between the movable contact rod 26 and the transverse insert 18 is made by a flexible braid 78 extending in the form of two half-loops in a plane transverse to the envelope 10 (FIG. 7). The two half-loops of the braid 78 surround on either side, the movable contact rod 26 while being by one of their ends secured to the metal insert 18 by a screw which is advantageously the positioning screw 76 axial of the transverse partition 34. The opposite end of the half-loops of the braid 78 is connected to the movable contact rod 26 by a screw diametrically opposite the screw 76. The length of the braid 78 is sufficient to extend near the casing 10 over a length sufficient for an axial clearance of the contact rod 26. With particular reference to FIG. 1, it can be seen that the braid 78 is made up of several strands superimposed in the axial direction of the pole to ensure a certain flexibility in this axial direction. In the intermediate position of the movable contact rod 26, the braid 78 extends substantially in a diametrical plane containing the insert 18, the upward and downward movement being effected during a sliding of the rod. movable contact 26 on either side of this diametrical plane. In the extreme position, the braid 78 extends in a slightly inclined plane, the length of this braid being sufficient to compensate for the increase in the distance between the fixing screws 76 and 80. This transverse arrangement of the braid 78 limits its height the space required to accommodate the braid 78, and allows a shortening of the circuit breaker pole. The connection screw 80 of the braid 78 to the contact rod 26 advantageously constitutes the axis of attachment and articulation of the rod 24. A second screw can be superimposed when using a braid of relatively large height .

La fixation du piston 36 sur la tige de contact mobile 26 peut être réalisée de différentes manières, une manière particulièrement simple consistant à prévoir sur l'extrémité de la tige 26 un rebord sur lequel s'emboîte la pièce injectée 40. Le maintien en position emboîtée peut être facilement réalisé par la mise en place des doigts de contacts principaux en tulipe 28 qui débordent latéralement de la tige de contact mobile 26 pour chevaucher sur la pièce injectée 40. Tout autre mode de fixation est bien entendu utilisable.The attachment of the piston 36 to the movable contact rod 26 can be carried out in different ways, a particularly simple manner consisting in providing on the end of the rod 26 a flange on which the injected part 40 fits. The holding in position nested can be easily achieved by the establishment of the main tulip contact fingers 28 which extend laterally from the movable contact rod 26 to overlap on the injected part 40. Any other method of attachment is of course usable.

L'absence de toute pièce métallique à l'exception de celle parcourue par le courant, permet une meilleure répartition du champ à l'intérieur du pôle, et une réduction à l'encombrement de ce dernier. Les pièces injectées 40,52 et éventuellement le joint racleur 48 et la bague de butée 66, sont par exemple en une résine polycarbonate ou en toute autre matière équivalente, tandis que la buse 38 est en polymère fluoré, par exemple en polytétrafluoréthylène. L'enveloppe 10 est de préférence d'une manière bien connue en soi en une résine époxyde.The absence of any metal part except that traversed by the current, allows a better distribution of the field inside the pole, and a reduction in the size of the latter. The injected parts 40, 52 and possibly the scraper seal 48 and the stop ring 66, are for example made of a polycarbonate resin or any other equivalent material, while the nozzle 38 is made of fluoropolymer, for example polytetrafluoroethylene. The envelope 10 is preferably of a well known per se in an epoxy resin.

Les figures 8 et 9 illustrent une variante de réalisation de la fixation par encliquetage de la buse 38 sur la pièce injectée 40. La buse 38 porte des dents 82 qui viennent s'encliqueter sur des pattes 84 en forme d'étrier portées par la pièce injectée 40.Figures 8 and 9 illustrate an alternative embodiment of the snap fastening of the nozzle 38 on the injected part 40. The nozzle 38 carries teeth 82 which snap on legs 84 in the form of a stirrup carried by the part injected 40.

D'autres modes de fixation sont concevables et les figures 10 à 12 montrent une fixation par l'intermédiaire d'une bague 88. la buse 38 porte un collet 94 circonférentiel au voisinage de sa base 42 et la pièce injectée 40 présente des becs 90 de fixation sur lesquels vient s'emboîter et se fixer la bague 88, qui prend appui sur le collet 94. La bague 88 comporte en regard de chaque bec 90 un orifice 98 en baïonnette dont la partie élargie 96 permet l'emboîtement de la bague sur le bec 90 et dont la partie étroite 98 permet par pivotement le passage sur le bec 90 et la fixation de la bague 88 et de la buse 38 sur la pièce injectée 40.Other methods of attachment are conceivable and FIGS. 10 to 12 show an attachment by means of a ring 88. the nozzle 38 carries a circumferential collar 94 in the vicinity of its base 42 and the injected part 40 has nozzles 90 fixing on which comes to fit and fix the ring 88, which is supported on the collar 94. The ring 88 comprises opposite each spout 90 an orifice 98 in bayonet whose enlarged part 96 allows the fitting of the ring on the spout 90 and whose narrow part 98 allows pivoting the passage over the spout 90 and the fixing of the ring 88 and of the nozzle 38 on the injected part 40.

L'invention est bien entendu nullement limitée au mode de mise en oeuvre plus particulièrement décrit et représenté aux dessins annexés.The invention is of course in no way limited to the mode of implementation more particularly described and shown in the accompanying drawings.

Claims (10)

1. Pôle d'un disjoncteur moyenne tension à autosoufflage par pistonnage d'un gaz à rigidité diélectrique élevée, comprenant une enveloppe (10) étanche isolante de forme générale cylindrique remplie par ledit gaz, dans laquelle sont disposés coaxialement un contact fixe (16) et un contact mobile (26,28), ce dernier étant monté à coulissement et portant un piston (36) confinant avec une cloison transversale (34) de subdivision de ladite enveloppe (10), un volume pistonnable de compression du gaz de soufflage de l'arc, tiré lors de la séparation desdits contacts, caractérisé en ce que ladite cloison transversale (34) est constituée par une pièce (52) en matière plastique injectée isolante introduite à faible jeu et maintenue fixe dans ladite enveloppe (10), ladite pièce (52) présentant un orifice central (54) de passage dudit contact mobile (26) lequel est, guidé par ladite pièce et des orifices (64) de passage du gaz équipés de clapets unidirectionnels (62) pour autoriser une libre entrée de gaz dans le volume pistonnable à travers ladite cloison (34) et empêcher un échappement du gaz dudit volume en sens inverse à travers lesdits orifices de passage.1. Pole of a medium-voltage circuit breaker with self-blowing by piston of a gas with high dielectric strength, comprising a sealed insulating envelope (10) of generally cylindrical shape filled with said gas, in which a fixed contact (16) are arranged coaxially and a movable contact (26, 28), the latter being slidably mounted and carrying a piston (36) confining with a transverse partition (34) for subdivision of said envelope (10), a pistonable volume for compression of the blowing gas of the arc, drawn during the separation of said contacts, characterized in that said transverse partition (34) consists of a piece (52) of injected insulating plastic material introduced with little play and kept fixed in said envelope (10), said part (52) having a central orifice (54) for the passage of said movable contact (26) which is guided by said part and orifices (64) for the passage of gas equipped with one-way valves (62) p or allow a free entry of gas into the pistonable volume through said partition (34) and prevent an escape of gas from said volume in the opposite direction through said passage orifices. 2. Pôle selon la revendication 1, caractérisé en ce que lesdits orifices (64) de passage s'étendent suivant une circonférence de ladite cloison (34) et sont susceptibles d'être coiffés et obturés par un disque annulaire (62) constituant lesdits clapets, sous l'action de la pression règnant dans le volume pistonnable.2. Pole according to claim 1, characterized in that said passage openings (64) extend along a circumference of said partition (34) and are capable of being capped and closed by an annular disc (62) constituting said valves , under the action of the pressure prevailing in the pistonable volume. 3. Pôle selon la revendication 2, caractérisé en ce que ledit disque annulaire (62) est intercalé avec jeu entre ladite cloison et une bague de retenue (66) emboîtée ou clipsée sur ladite pièce injectée (52).3. Pole according to claim 2, characterized in that said annular disc (62) is interposed with clearance between said partition and a retaining ring (66) fitted or clipped onto said injected part (52). 4. Pôle selon la revendication 3, caractérisé en ce qu'il comporte un joint (72) d'étanchéité entre la cloison (34) et l'enveloppe (10), ledit joint étant disposé circonférentiel­ lement sur ladite pièce injectée (52) et maintenu par ladite bague de retenue (66).4. Pole according to claim 3, characterized in that it comprises a seal (72) sealing between the partition (34) and the casing (10), said seal being arranged circumferentially Lement on said injected part (52) and held by said retaining ring (66). 5. Pôle selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite pièce injectée (52) comporte un ergot (58) en saillie latérale, s'engageant dans une rainure conjuguée ménagée longitudinalement dans la paroi interne de l'enveloppe (10) pour immobiliser en rotation ladite pièce injectée.5. A pole according to any one of the preceding claims, characterized in that said injected part (52) comprises a lug (58) projecting laterally, engaging in a conjugate groove formed longitudinally in the inner wall of the envelope ( 10) to immobilize said injected part in rotation. 6. Pôle selon l'une quelconque des revendications précédentes, ayant un insert dans ladite enveloppe (10) formant une traversée latérale (18) d'amenée de courant, caractérisé en ce que ladite pièce injectée (52) est positionnée dans ladite enveloppe (10) en étant intercalée entre un rebord rétrécie (74) de l'enveloppe (10) et ladite traversée (18).6. Pole according to any one of the preceding claims, having an insert in said envelope (10) forming a lateral feed-through (18), characterized in that said injected part (52) is positioned in said envelope ( 10) being interposed between a narrowed flange (74) of the envelope (10) and said bushing (18). 7. Pôle selon l'une quelconque des revendications précédentes, caractérisé en ce que ledit piston (36) est en matière plastique injectée sur lequel est encliquetée une buse (38) de guidage des gaz de soufflage de l'arc.7. A pole according to any one of the preceding claims, characterized in that said piston (36) is of injected plastic material on which is clipped a nozzle (38) for guiding the arc blowing gases. 8. Pôle selon la revendication 7, caractérisé en ce que le piston (36) porte un segment racleur (48) assurant l'étanchéité entre le piston (36) et ladite enveloppe (10).8. Pole according to claim 7, characterized in that the piston (36) carries a scraper segment (48) ensuring the seal between the piston (36) and said envelope (10). 9. Pôle selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte une tresse (78) d'amenée de courant reliée d'une part au contact mobile (26) coulissant et d'autre part à une traversée latérale (18) de ladite enveloppe (10) et s'étendant sensiblement dans un plan transversal de l'enveloppe.9. Pole according to any one of the preceding claims, characterized in that it comprises a braid (78) for supplying current connected on the one hand to the movable contact (26) sliding and on the other hand to a lateral crossing. (18) of said envelope (10) and extending substantially in a transverse plane of the envelope. 10. Pôle selon la revendication 9, caractérisé en ce que dans la position médiane du contact mobile (26) ladite tresse (78) s'étend essentiellement dans un plan diamétral de l'enveloppe contenant ladite traversée (18) et que ladite tresse est fixée au contact mobile en un point diamétralement opposé de la traversée.10. Pole according to claim 9, characterized in that in the middle position of the movable contact (26) said braid (78) extends essentially in a diametral plane of the envelope containing said bushing (18) and that said braid is attached to movable contact at a diametrically opposite point of the crossing.
EP89420486A 1989-01-17 1989-12-12 Pole for puffer-type electrical circuit breaker Expired - Lifetime EP0378950B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900581A FR2641898B1 (en) 1989-01-17 1989-01-17 SELF-BLOWING ELECTRIC CIRCUIT BREAKER
FR8900581 1989-01-17

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Publication Number Publication Date
EP0378950A1 true EP0378950A1 (en) 1990-07-25
EP0378950B1 EP0378950B1 (en) 1994-04-20

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Application Number Title Priority Date Filing Date
EP89420486A Expired - Lifetime EP0378950B1 (en) 1989-01-17 1989-12-12 Pole for puffer-type electrical circuit breaker

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US (1) US5095183A (en)
EP (1) EP0378950B1 (en)
JP (1) JP3133044B2 (en)
CN (1) CN1024970C (en)
AU (1) AU626380B2 (en)
BR (1) BR9000156A (en)
CA (1) CA2006033C (en)
DE (1) DE68914819T2 (en)
ES (1) ES2055143T3 (en)
FR (1) FR2641898B1 (en)
ZA (1) ZA9028B (en)

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EP2325858A1 (en) * 2009-11-20 2011-05-25 ABB Technology AG Medium Voltage circuit breaker arrangement
WO2011060921A1 (en) * 2009-11-20 2011-05-26 Abb Technology Ag Medium voltage circuit breaker arrangement
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Also Published As

Publication number Publication date
CA2006033A1 (en) 1990-07-17
JP3133044B2 (en) 2001-02-05
AU4934290A (en) 1991-08-29
EP0378950B1 (en) 1994-04-20
BR9000156A (en) 1990-10-23
ES2055143T3 (en) 1994-08-16
FR2641898A1 (en) 1990-07-20
JPH02227924A (en) 1990-09-11
US5095183A (en) 1992-03-10
CA2006033C (en) 1999-11-02
CN1024970C (en) 1994-06-08
CN1044361A (en) 1990-08-01
FR2641898B1 (en) 1991-03-15
DE68914819T2 (en) 1994-10-27
AU626380B2 (en) 1992-07-30
ZA9028B (en) 1990-09-26
DE68914819D1 (en) 1994-05-26

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