EP1148527B1 - Gas-blast switch having an arc chamber with reduced gas compression and an alternatively moving piston - Google Patents

Gas-blast switch having an arc chamber with reduced gas compression and an alternatively moving piston Download PDF

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Publication number
EP1148527B1
EP1148527B1 EP01400884A EP01400884A EP1148527B1 EP 1148527 B1 EP1148527 B1 EP 1148527B1 EP 01400884 A EP01400884 A EP 01400884A EP 01400884 A EP01400884 A EP 01400884A EP 1148527 B1 EP1148527 B1 EP 1148527B1
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EP
European Patent Office
Prior art keywords
contact
piston
switch
cylinder
movement
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EP01400884A
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German (de)
French (fr)
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EP1148527A1 (en
Inventor
Joel Ozil
Michel Perret
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Grid Solutions SAS
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Areva T&D SAS
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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
    • H01H33/905—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the compression volume being formed by a movable cylinder and a semi-mobile piston
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H2033/028—Details the cooperating contacts being both actuated simultaneously in opposite directions

Definitions

  • the invention relates generally to a switch, and more particularly on a circuit breaker, having a breaking chamber with reduced gas compression.
  • the invention can be applied equally well to circuit breakers with single contact movement than with double circuit breakers movement of contacts.
  • the functionality of the double movement of the contacts and that of the reduced gas compression are known separately for many years, but their association has drawbacks explained below.
  • a device has in particular been the subject of Patent FR 2,696,274.
  • the principle of reduced compression means that in the interrupting chamber, the compression of the gas is not performed only during part of the contact stroke, generally less than 50% of it.
  • This first part of the circuit breaker opening operation corresponds to the movement of contacts from the closed position to the start of arc blowing following their separation.
  • the gas compression is maximum at the moment separation of the contacts, and drops rapidly with the blowing of the arc. The energy required to open the circuit breaker is therefore reduced during the second part of the contact stroke.
  • the reduced speed of the contacts mobile in a dual movement device has an advantage certain in terms of total kinetic energy consumed which can be reduced by around 50% (schematically, the moving masses double but the average speed of contacts decreases by half, hence a kinetic energy approximately divided by 2).
  • such reciprocating piston system can provide compression length typically between 1.1 x R / 2 to 1.25 ⁇ R / 2, instead of L equal to R for a fixed piston.
  • the pressure of blowing therefore remains significantly lower than that obtained in a blowing therefore remains very internal to that obtained in a analog circuit breaker with simple movement.
  • An object of the invention is to propose a solution which remedies these disadvantages, and which can be applied to all types of circuit breakers cut-off chamber with reduced gas compression, whether single or double movement of the contacts.
  • the invention makes it possible to combine, in a circuit breaker with double contact movement, the advantages of single circuit breakers movement with those of double movement circuit breakers without have the disadvantages.
  • the invention provides a device having the same compression length L as a single device movement, at distance R of identical contact overlap.
  • the invention also makes it possible to improve the performance of circuit breakers simple touch movement.
  • the known devices of the prior art do not allow to obtain that L typically between R and 1.25 x R. comparison, a device proposed in the context of the invention allows to obtain L at least equal to 2 x R.
  • the invention relates to an arc blast switch according to claim 1.
  • said second contact is movable in said direction longitudinal in the opposite direction of said first contact.
  • said piston is alternately in connection with the second and the first contact during the switch opening operation.
  • a circuit breaker according to the invention is shown in half-section axial along its axis of revolution A. It includes an envelope, generally cylindrical in shape not shown in the figures, with the interior of which is disposed a first contact 1 which is hollow and which is movable in translation in direction A with a cylindrical cut 2 coaxially surrounding the contact 1.
  • the chamber cut-off 2 forms a blowing volume 3 and a volume of compression 4 separated by a crown 5 coaxial at contact 1, which extends radially from contact 1 and which is integral with it.
  • the blowing volume is closed by a nozzle 6 and communicates with through the crown 5 by a one-way valve 7 with the volume of compression 4 which is closed by a piston 8.
  • the circuit breaker also includes in the enclosure a second contact 9 in the form of a rod which is inserted into the hollow contact 1 in circuit breaker closing position.
  • This contact 9 is coaxial with the contact 1 and passes through the neck of the nozzle 6 in the closed position of the circuit breaker as shown in Figure 1.
  • contact 9 or contact 1 is moved in translation in direction A to be inserted in the other contact or be separated from the latter.
  • the movement of the contact 9 is returned in the opposite direction to the contact 1 by a fixed swivel mechanism in the enclosure of the circuit breaker, illustrated by 10 and which can be a rack system or deflection levers so that the two contacts always move in the opposite direction in direction A.
  • the piston 8 is integral in movement with the contact 9 by in particular through a mechanical telescopic link 11 which extends in direction A and which is formed by a first cylinder 12 extending the rear of the piston 8 and of a second cylinder 13 sliding on the cylinder 12.
  • a peripheral connection (14) which may consist of a third cylinder or connecting rods arranged around the axis A, surrounds the second cylinder 13 and is attached to it as well as to the second contact 9 by known fixing means.
  • This peripheral link (14) advantageously comprises a cylindrical section of insulating material 15.
  • Contact 1 has a bead over part of its length device 16 on which the balls 17 supported in openings 18 formed in the cylinder 12 and coming to engage in an internal peripheral groove 19 of the second cylinder 13 in the gas compression phase, i.e. at the start of opening.
  • the telescopic link 11 is then locked by the balls 17 which transmit the thrust from the second cylinder 13 to the part 12A of the first cylinder 12 which is extended by the piston 8. From this done, the piston 8 is moved in the opposite direction from contact 1 and therefore from cylinder head 5 so that when approaching each other, cylinder head 5 and the piston 8 compress the gas in the compression volume 4.
  • the small annular part 12B of the first cylinder 12 located at the end of the cylinder opposite the piston, does not undergoes no effort from the balls, so that play can exist between the balls and said annular part 12B.
  • part 12A of the first cylinder 12 it comprises at the openings 18 of the housings each having a portion of spherical surface complementary to the surface of the ball bearing against this housing, in order to limit the contact pressures exerted by the balls on said part 12A during gas compression.
  • the depth of the grooves 19 of the second cylinder 13 is typically between 30% and 50% of the diameter D of the balls.
  • the part 12A of the first cylinder 12 can therefore have a thickness up to 70% of the diameter D of the balls.
  • the play between the balls and the annular part 12B allows that the minimum diameter G of the opening 18 is greater than the diameter D of the balls, even when the space between the part 12A of the first cylinder 12 and the peripheral bead 16 is reduced to a minimum.
  • the length L of the compression volume 4 in the direction A is substantially equal to the length R of the overlap area of the contacts, as well as the length of movement of the balls 17 on the bead 16.
  • the insulation distance d between the two contacts 1 and 9 is otherwise substantially equal to the length of the relative displacement of the second cylinder 13 relative to cylinder 12 in direction A.
  • FIG. 7 illustrates an alternative embodiment of a circuit breaker with double movement of the contacts according to the invention.
  • a part of the gas compression operation of the compression volume is carried out before the start of the first movement phase and second contacts, which is delayed in relation to tripping opening the switch to allow the piston to travel a distance ⁇ when the movement of the contacts is engaged.
  • the delay in moving the first and second contacts is provided by two telescopic insert systems 20 and 21 which separate respectively the first contact 1 and the peripheral link 14 each in two parts in the longitudinal direction (A).
  • Each system insert allows to introduce a certain longitudinal travel between the two parts of the same element that it separates.
  • Figure 7 is shown with a clearance ⁇ consisting of gas space, but other variants can be envisaged.
  • the inserts 20 and 21 may each consist of a spring joining the two parts it separates. Blocking systems first and second contacts must then be set up so that keep these contacts stationary as long as the piston 8 moves in volume 4 has not reached the desired length ⁇ .
  • a system of movement return for example from cylinders 12 or 13 of the telescopic link 11, can unlock these locking systems as soon as that the length ⁇ is reached, the springs then being compressed, to allow the setting in motion of the first and second contacts with a significant acceleration.
  • This device increases the compression volume, at detriment of the contact separation time which increases, as well as the mass of the moving parts. At equivalent compression volume, we can decrease the overlap distance R of the first and second contacts by increasing ⁇ .
  • the delay in moving the first and second contacts is here provided by means consisting of a single system of inserts telescopic, such as springs 26, allowing to introduce a certain longitudinal travel between the second cylinder 13 and the link peripheral 14.
  • the latter can be extended by a part cylindrical 14A surrounding the second cylinder 13 and capable of sliding the along it, for example thanks to ball bearings.
  • the pivoting mechanism 10 for coordinating the movements of the first and second contacts pass through the second cylinder 13 by longitudinal openings provided for this purpose.
  • the circuit breaker operating mechanism is connected to the second cylinder 13 and acts in thrust in the direction of the arrow on the figure when opening the circuit breaker.
  • the blocking system first and second contacts can here be achieved by a single device 30, consisting for example of a lockable pivoting arm 31 retaining the peripheral link 14 by a lug, this arm being able to be unlocked in a known manner by the thrust of the second cylinder 13 on an element 32 controlling the movement of said arm, as soon as said second cylinder has traveled a distance ⁇ .
  • FIG. 8 represents a circuit breaker whose constituent means are equivalent to those of the circuit breaker described in Figures 1 and 3, with the exception of the operating means 25 of the second contact which are separated from the means 24 operating the first contact.
  • the stroke L of the piston 8 during the phase of gas compression is equal to the distance R of overlap of first and second contacts. It is also possible to obtain a length compression L greater than R by separating the first contact 1 into two parts by a system of telescopic inserts 20 as shown in Figure 7.
  • the operating means 25 will then be actuated with a certain delay with respect to the means 24, depending on the travel ⁇ provided by said system of inserts, so as to synchronize the displacements of the first and second contacts.

Landscapes

  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The circuit breaker construction has a first contact (1) moving longitudinally inside an arc breaking chamber (2) with gas compressed by a piston (8). Piston movement is by a telescopic connection (11). The length of displacement of the piston in the compression phase is equal to the length of movement of the first contact in the first compression phase.

Description

L'invention porte de façon générale sur un interrupteur, et plus particulièrement sur un disjoncteur, possédant une chambre de coupure à compression de gaz réduite. L'invention peut s'appliquer aussi bien aux disjoncteurs à simple mouvement de contact qu'aux disjoncteurs à double mouvement des contacts. En particulier, la fonctionnalité du double mouvement des contacts et celle de la compression de gaz réduite sont connues séparément depuis de nombreuses années, mais leur association présente des inconvénients expliqués plus loin. Concernant la compression de gaz réduite, un dispositif a notamment fait l'objet du brevet FR 2 696 274.The invention relates generally to a switch, and more particularly on a circuit breaker, having a breaking chamber with reduced gas compression. The invention can be applied equally well to circuit breakers with single contact movement than with double circuit breakers movement of contacts. In particular, the functionality of the double movement of the contacts and that of the reduced gas compression are known separately for many years, but their association has drawbacks explained below. About the reduced gas compression, a device has in particular been the subject of Patent FR 2,696,274.

Il convient de rappeler que le principe de la compression réduite signifie que dans la chambre de coupure, la compression du gaz n'est effectuée que pendant une partie de la course des contacts, généralement inférieure à 50% de celle-ci. Cette première partie de l'opération d'ouverture du disjoncteur correspond au déplacement des contacts depuis la position fermée jusqu'au début du soufflage de l'arc qui suit leur séparation. La compression du gaz est maximale au moment de la séparation des contacts, et chute rapidement avec le soufflage de l'arc. L'énergie nécessaire pour l'ouverture du disjoncteur est donc réduite pendant la deuxième partie de la course des contacts.It should be remembered that the principle of reduced compression means that in the interrupting chamber, the compression of the gas is not performed only during part of the contact stroke, generally less than 50% of it. This first part of the circuit breaker opening operation corresponds to the movement of contacts from the closed position to the start of arc blowing following their separation. The gas compression is maximum at the moment separation of the contacts, and drops rapidly with the blowing of the arc. The energy required to open the circuit breaker is therefore reduced during the second part of the contact stroke.

Le principe du double mouvement des contacts est appliqué depuis plus longtemps (voir brevet FR 2 491 675), car il consiste simplement à entraíner simultanément chacun des deux contacts dans des directions opposées, soit à des vitesses instantanées égales, ce qui revient à un déplacement symétrique par rapport à la position de fermeture, soit à des vitesses différentes. L'entraínement peut être réalisé par un système à bielles de renvoi ou à crémaillères. L'intérêt de ce type de dispositif par rapport à un dispositif à simple mouvement est de permettre de diminuer le temps de séparation des contacts, sans augmenter la vitesse du contact mobile. En effet, le temps de séparation des contacts dépend de leur vitesse moyenne relative et de leur distance de recouvrement R. Ainsi, pour un dispositif à double mouvement symétrique, le temps de séparation des contacts est environ divisé par deux par rapport à un dispositif à simple mouvement, à distance de recouvrement R et vitesse moyenne des contacts identiques. De plus, à la séparation des contacts, chaque contact s'est déplacé seulement d'une distance R/2 dans l'enveloppe du disjoncteur à double mouvement symétrique, alors que le contact mobile s'est déplacé d'une distance R dans l'enveloppe du disjoncteur à simple mouvement. Enfin, la vitesse réduite des contacts mobiles dans un dispositif à double mouvement présente un avantage certain en matière d'énergie cinétique totale consommée qui peut être réduite de l'ordre de 50% (schématiquement, les masses en mouvement doublent mais la vitesse moyenne des contacts diminue de moitié, d'où une énergie cinétique environ divisée par 2).The principle of the double movement of the contacts has been applied since longer (see patent FR 2 491 675), because it simply consists of simultaneously drive each of the two contacts in directions opposite, either at equal instantaneous speeds, which amounts to a symmetrical movement relative to the closed position, i.e. at different speeds. The drive can be carried out by a system with return or rack rods. The advantage of this type of device by compared to a single movement device is to allow to decrease the contact separation time, without increasing the speed of the mobile contact. Indeed, the contact separation time depends on their relative average speed and their overlap distance R. Thus, for a device with a symmetrical double movement, the time of contact separation is roughly halved compared to one single movement device, overlapping distance R and speed average of identical contacts. In addition, when the contacts are separated, each contact moved only by an R / 2 distance in the envelope of the symmetrical double movement circuit breaker, while the moving contact has moved by a distance R in the envelope of the single movement circuit breaker. Finally, the reduced speed of the contacts mobile in a dual movement device has an advantage certain in terms of total kinetic energy consumed which can be reduced by around 50% (schematically, the moving masses double but the average speed of contacts decreases by half, hence a kinetic energy approximately divided by 2).

La fonctionnalité du double mouvement des contacts n'apporte pourtant pas que des avantages, notamment si elle est associée à une chambre de coupure à compression de gaz réduite. En effet, du fait du déplacement réduit des contacts, la longueur L (course relative du piston dans la chambre de compression) du volume de compression est diminuée de moitié, d'où une pression de soufflage aussi diminuée de moitié.The functionality of the double movement of the contacts however not only advantages, especially if it is associated with a cut-off chamber with reduced gas compression. Indeed, due to the reduced displacement of the contacts, length L (relative stroke of the piston in the compression chamber) the compression volume is halved, hence a blowing pressure also reduced by half.

Il convient de rappeler que dans la plupart des disjoncteurs à compression de gaz réduite, le piston de la chambre de coupure est en général maintenu fixe dans l'enveloppe pendant la première partie de l'ouverture du disjoncteur. C'est en fait la chambre de compression qui est solidaire du contact portant la buse de soufflage, et qui se rapproche du piston pour obtenir la compression du gaz (voir le brevet FR 2 696 274 cité plus haut). Pour un disjoncteur à simple mouvement, on obtient alors une longueur de compression L égale à la course du contact mobile pendant la première phase de l'ouverture, c'est à dire aussi égale à la distance de recouvrement R des contacts. On considère pour simplifier que le volume de compression Vc est égal à L x S, S étant la section (l'alésage) du piston.It should be remembered that in most circuit breakers with reduced gas compression, the cutting chamber piston is in general kept fixed in the envelope during the first part of opening of the circuit breaker. It is in fact the compression chamber which is integral with the contact carrying the blowing nozzle, and which approaches piston to obtain gas compression (see patent FR 2 696 274 cited above). For a single movement circuit breaker, we then obtain a compression length L equal to the stroke of the movable contact during the first phase of the opening, i.e. also equal to the overlap distance R of the contacts. We consider to simplify that the compression volume Vc is equal to L x S, S being the section (the bore) of the piston.

En comparaison, un disjoncteur à double mouvement des contacts implique une longueur de compression L égale à R/2. Ainsi, pour obtenir un volume de compression Vc équivalent à celui du disjoncteur à simple mouvement sans augmenter la distance de recouvrement R des contacts, il faut doubler la section S du piston. Cette solution présente des inconvénients de trois ordres:

  • elle oblige à augmenter le diamètre de l'enveloppe, et donc son encombrement,
  • elle impose de doubler l'effort nécessaire à la compression pour obtenir une même pression de gaz,
  • elle aboutit à quasiment doubler la masse des éléments mobiles, ce qui annule le gain en énergie cinétique consommée procuré par la fonctionnalité du double mouvement.
In comparison, a circuit breaker with double movement of the contacts implies a compression length L equal to R / 2. Thus, to obtain a compression volume Vc equivalent to that of the single-movement circuit breaker without increasing the overlap distance R of the contacts, the section S of the piston must be doubled. This solution has drawbacks of three kinds:
  • it requires increasing the diameter of the envelope, and therefore its size,
  • it requires doubling the effort necessary for compression to obtain the same gas pressure,
  • it results in almost doubling the mass of the mobile elements, which cancels the gain in kinetic energy consumed provided by the functionality of the double movement.

Afin d'augmenter le volume de compression sans augmenter la section du piston, certains dispositifs à simple mouvement permettent d'obtenir une longueur de compression L supérieure à la distance de recouvrement R des contacts, typiquement 1,1×R à 1,25×R. A cet effet, le piston n'est plus fixe pendant la phase de compression, mais se déplace quelque peu dans l'enveloppe en direction de la chambre de compression grâce à un système de renvoi à bielles reliées au piston et au contact portant la chambre de compression. On trouve par exemple un tel système dans le brevet EP 0 664 552. On parle alors de mouvement alternatif du piston, puisque celui ci se déplace dans un sens pendant la phase de compression, et dans l'autre sens après la séparation des contacts. Ce déplacement pendant la première phase du mouvement est égal à la différence L - R et ne représente que 10% à 20% de la longueur L du volume de compression dans les dispositifs connus.In order to increase the compression volume without increasing the piston section, some simple movement devices allow to obtain a compression length L greater than the distance of R covering of the contacts, typically 1.1 × R to 1.25 × R. To this end, the piston is no longer fixed during the compression phase, but moves somewhat in the envelope towards the chamber compression thanks to a return system with connecting rods connected to the piston and on contact with the compression chamber. There is for example a such a system in patent EP 0 664 552. We then speak of movement reciprocating piston, since the latter moves in one direction during the compression phase, and in the other direction after the separation of contact. This displacement during the first phase of the movement is equal to the difference L - R and represents only 10% to 20% of the length L of the compression volume in known devices.

Appliqué à un disjoncteur à double mouvement des contacts, un tel système de mouvement alternatif du piston peut permettre d'obtenir une longueur de compression typiquement comprise entre 1,1 x R/2 à 1,25 × R/2, au lieu de L égale à R pour un piston fixe. La pression de soufflage reste donc nettement inférieure à celle obtenue dans un soufflage reste donc nbtrêment intérieure à celle obtenue dans un disjoncteur analogue à simple mouvement.Applied to a circuit breaker with double movement of contacts, such reciprocating piston system can provide compression length typically between 1.1 x R / 2 to 1.25 × R / 2, instead of L equal to R for a fixed piston. The pressure of blowing therefore remains significantly lower than that obtained in a blowing therefore remains very internal to that obtained in a analog circuit breaker with simple movement.

Un but de l'invention est de proposer une solution qui remédie à ces inconvénients, et pouvant s'appliquer à tous les types de disjoncteurs à chambre de coupure à compression de gaz réduite, qu'ils soient à simple ou à double mouvement des contacts.An object of the invention is to propose a solution which remedies these disadvantages, and which can be applied to all types of circuit breakers cut-off chamber with reduced gas compression, whether single or double movement of the contacts.

Notamment, l'invention permet de cumuler, dans un disjoncteur à double mouvement des contacts, les avantages des disjoncteurs à simple mouvement avec ceux des disjoncteurs à double mouvement sans en avoir les inconvénients. En particulier, l'invention propose un dispositif possédant la même longueur de compression L qu'un dispositif à simple mouvement, à distance R de recouvrement des contacts identique. L'invention permet aussi d'améliorer les performances des disjoncteurs à simple mouvement de contact. Les dispositifs connus de l'art antérieur ne permettent d'obtenir que L typiquement compris entre R et 1,25 x R. En comparaison, un dispositif proposé dans le cadre de l'invention permet d'obtenir L au moins égale à 2 x R.In particular, the invention makes it possible to combine, in a circuit breaker with double contact movement, the advantages of single circuit breakers movement with those of double movement circuit breakers without have the disadvantages. In particular, the invention provides a device having the same compression length L as a single device movement, at distance R of identical contact overlap. The invention also makes it possible to improve the performance of circuit breakers simple touch movement. The known devices of the prior art do not allow to obtain that L typically between R and 1.25 x R. comparison, a device proposed in the context of the invention allows to obtain L at least equal to 2 x R.

A cet effet, l'invention a pour object un interrupteur à soufflage d'arc selon la revendication 1. To this end, the invention relates to an arc blast switch according to claim 1.

Selon un premier mode de réalisation de l'interrupteur d'après l'invention, ledit second contact est mobile selon ladite direction longitudinale en sens contraire dudit premier contact.According to a first embodiment of the switch according to the invention, said second contact is movable in said direction longitudinal in the opposite direction of said first contact.

Selon un mode de réalisation particulier de l'interrupteur d'après l'invention, ledit piston est alternativement en liaison avec le second et le premier contact durant l'opération d'ouverture de l'interrupteur.According to a particular embodiment of the switch according to the invention, said piston is alternately in connection with the second and the first contact during the switch opening operation.

Selon un mode de réalisation particulier de l'interrupteur d'après l'invention, ledit piston est solidaire du second contact mobile pendant toute la phase de compression du gaz, et s'en désolidarise après la séparation desdits premier et second contacts pour devenir solidaire dudit premier contact. Cette liaison solidaire permet d'obtenir une longueur de compression L égale à ladite distance R.

  • La figure 1 est une représentation très schématique, en demi-coupe axiale, d'un disjoncteur selon l'invention dans sa position de fermeture.
  • La figure 2 est une représentation très schématique, en demi-coupe axiale, d'un disjoncteur selon l'invention dans une position intermédiaire d'ouverture.
  • La figure 3 est une représentation très schématique, en demi-coupe axiale, d'un disjoncteur selon l'invention dans sa position d'ouverture.
  • La figure 4 est une représentation très schématique, en demi-coupe axiale, d'un ensemble de blocage utilisé dans le dispositif selon l'invention. L'ensemble est représenté en phase de compression du gaz.
  • La figure 5 est une représentation dudit ensemble de blocage en fin de compression du gaz, dans une position correspondant à celle décrite par la figure 2.
  • La figure 6 est une représentation dudit ensemble de blocage juste après la position décrite par la figure 5. Ce moment correspond à l'inversion du mouvement du piston.
  • La figure 7 est une représentation très schématique, en demi-coupe axiale, d'un mode de réalisation particulier d'un disjoncteur selon l'invention. Des inserts télescopiques introduisant un débattement Δ permettent que la course L du piston dans le volume de compression durant la phase de compression du gaz soit supérieure à la distance R de recouvrement des premier et second contacts.
  • La figure 8 est une représentation très schématique, en demi-coupe axiale, d'un disjoncteur selon l'invention possédant des moyens de manoeuvre du second contact qui sont séparés de ceux du premier contact.
  • La figure 9 est une représentation très schématique, en demi-coupe axiale, d'un système d'inserts à ressorts introduisant un débattement Δ permettant un résultat équivalent à celui procuré par le dispositif décrit à la figure 7.
    • According to a particular embodiment of the switch according to the invention, said piston is integral with the second movable contact during the entire compression phase of the gas, and dissociates therefrom after the separation of said first and second contacts to become integral said first contact. This integral connection makes it possible to obtain a compression length L equal to said distance R.
  • Figure 1 is a very schematic representation, in axial half-section, of a circuit breaker according to the invention in its closed position.
  • Figure 2 is a very schematic representation, in axial half-section, of a circuit breaker according to the invention in an intermediate open position.
  • Figure 3 is a very schematic representation, in axial half-section, of a circuit breaker according to the invention in its open position.
  • Figure 4 is a very schematic representation, in axial half-section, of a locking assembly used in the device according to the invention. The assembly is shown in the gas compression phase.
  • FIG. 5 is a representation of said blocking assembly at the end of gas compression, in a position corresponding to that described in FIG. 2.
  • Figure 6 is a representation of said locking assembly just after the position described in Figure 5. This moment corresponds to the reversal of the movement of the piston.
  • Figure 7 is a very schematic representation, in axial half-section, of a particular embodiment of a circuit breaker according to the invention. Telescopic inserts introducing a travel Δ allow the stroke L of the piston in the compression volume during the gas compression phase to be greater than the distance R of overlap of the first and second contacts.
  • Figure 8 is a very schematic representation, in axial half-section, of a circuit breaker according to the invention having means for operating the second contact which are separate from those of the first contact.
  • FIG. 9 is a very schematic representation, in axial half-section, of a system of spring inserts introducing a travel Δ allowing a result equivalent to that provided by the device described in FIG. 7.

    • Sur les figures, un disjoncteur selon l'invention est montré en demi-coupe axiale selon son axe de révolution A. Il comprend une enveloppe, de forme généralement cylindrique non représentée sur les figures, à l'intérieur de laquelle est disposé un premier contact 1 qui est creux et qui est mobile en translation suivant la direction A avec une chambre de coupure cylindrique 2 entourant coaxialement le contact 1. La chambre de coupure 2 forme un volume de soufflage 3 et un volume de compression 4 séparés par une couronne 5 coaxiale au contact 1, qui s'étend radialement depuis le contact 1 et qui est solidaire de celui-ci . Le volume de soufflage est fermé par une buse 6 et communique à travers la couronne 5 par un clapet unidirectionnel 7 avec le volume de compression 4 qui est fermé par un piston 8.In the figures, a circuit breaker according to the invention is shown in half-section axial along its axis of revolution A. It includes an envelope, generally cylindrical in shape not shown in the figures, with the interior of which is disposed a first contact 1 which is hollow and which is movable in translation in direction A with a cylindrical cut 2 coaxially surrounding the contact 1. The chamber cut-off 2 forms a blowing volume 3 and a volume of compression 4 separated by a crown 5 coaxial at contact 1, which extends radially from contact 1 and which is integral with it. The blowing volume is closed by a nozzle 6 and communicates with through the crown 5 by a one-way valve 7 with the volume of compression 4 which is closed by a piston 8.

    Le disjoncteur comprend encore dans l'enveloppe un second contact 9 en forme de tige qui vient s'insérer dans le contact creux 1 en position de fermeture du disjoncteur. Ce contact 9 est coaxial au contact 1 et traverse le col de la buse 6 en position de fermeture du disjoncteur comme visible sur la figure 1. En fonction du positionnement du mécanisme de manoeuvre, non représenté sur les figures, le contact 9 ou le contact 1 est déplacé en translation suivant la direction A pour être inséré dans l'autre contact ou être séparé de ce dernier.The circuit breaker also includes in the enclosure a second contact 9 in the form of a rod which is inserted into the hollow contact 1 in circuit breaker closing position. This contact 9 is coaxial with the contact 1 and passes through the neck of the nozzle 6 in the closed position of the circuit breaker as shown in Figure 1. Depending on the positioning of the operating mechanism, not shown in the figures, contact 9 or contact 1 is moved in translation in direction A to be inserted in the other contact or be separated from the latter.

    Le mouvement du contact 9 est renvoyé en sens contraire au contact 1 par un mécanisme pivotant fixe dans l'enveloppe du disjoncteur, illustré par 10 et qui peut être un système de crémaillères ou de leviers de renvoi de sorte que les deux contacts se déplacent toujours en sens contraire selon la direction A.The movement of the contact 9 is returned in the opposite direction to the contact 1 by a fixed swivel mechanism in the enclosure of the circuit breaker, illustrated by 10 and which can be a rack system or deflection levers so that the two contacts always move in the opposite direction in direction A.

    Le piston 8 est solidaire en mouvement du contact 9 par l'intermédiaire notamment d'une liaison mécanique 11 téléscopique qui s'étend suivant la direction A et qui est formée d'un premier cylindre 12 prolongeant l'arrière du piston 8 et d'un second cylindre 13 coulissant sur le cylindre 12. Une liaison périphérique (14), pouvant être constituée d'un troisième cylindre ou de bielles de liaison disposées autour de l'axe A, entoure le second cylindre 13 et y est fixée de même qu'au second contact 9 par des moyens de fixations connus. Cette liaison périphérique (14) comporte avantagement un tronçon cylindrique en matière isolante 15. Le contact 1 comporte sur une partie de sa longueur un bourrelet périphérique 16 sur lequel prennent appui des billes 17 disposées dans des ouvertures 18 ménagées dans le cylindre 12 et venant s'engager dans une gorge périphérique interne 19 du second cylindre 13 dans la phase de compression de gaz, c'est-à-dire en début d'ouverture.The piston 8 is integral in movement with the contact 9 by in particular through a mechanical telescopic link 11 which extends in direction A and which is formed by a first cylinder 12 extending the rear of the piston 8 and of a second cylinder 13 sliding on the cylinder 12. A peripheral connection (14), which may consist of a third cylinder or connecting rods arranged around the axis A, surrounds the second cylinder 13 and is attached to it as well as to the second contact 9 by known fixing means. This peripheral link (14) advantageously comprises a cylindrical section of insulating material 15. Contact 1 has a bead over part of its length device 16 on which the balls 17 supported in openings 18 formed in the cylinder 12 and coming to engage in an internal peripheral groove 19 of the second cylinder 13 in the gas compression phase, i.e. at the start of opening.

    Figure 1, dans la position de fermeture du disjoncteur, le piston 8 est écarté de la culasse formée par la couronne 5 à l'extrémité de la chambre de compression opposée au piston, et les billes 17 en appui sur le bourrelet 16 sont engagées dans les gorges 19 du second cylindre 13. La liaison télescopique 11 est alors verrouillée dans sa position déployée. Lors d'une première partie d'une opération d'ouverture, le contact 1 est déplacé dans un certain sens suivant la direction A, ici vers la droite, et le contact 9 est déplacé dans le sens opposé suivant la direction A, ici vers la gauche comme indiqué par les flèches. On peut noter que ce déplacement mutuel des contacts peut aussi être assuré par une poussée du mécanisme de manoeuvre, non représenté sur les figures, sur le second cylindre 13. La liaison télescopique 11 est alors verrouillée par les billes 17 qui transmettent la poussée du second cylindre 13 à la partie 12A du premier cylindre 12 qui se prolonge par le piston 8. De ce fait, le piston 8 est déplacé en sens contraire du contact 1 et donc de la culasse 5 de sorte qu'en se rapprochant l'un de l'autre, la culasse 5 et le piston 8 compriment le gaz dans le volume de compression 4. On peut noter, comme illustré sur la figure 4, que la petite partie annulaire 12B du premier cylindre 12, située à l'extrémité du cylindre opposée au piston, ne subit aucun effort venant des billes, de sorte qu'un jeu peut exister entre les billes et ladite partie annulaire 12B. Quant à la partie 12A du premier cylindre 12, elle comporte au niveau des ouvertures 18 des logements présentant chacun une portion de surface sphérique complémentaire à la surface de la bille en appui contre ce logement, afin de limiter les pressions de contact exercées par les billes sur ladite partie 12A lors de la compression du gaz. Afin de limiter les contraintes subies par la liaison télescopique 11 au niveau des billes 17, la profondeur des gorges 19 du second cylindre 13 est typiquement comprise entre 30% et 50% du diamètre D des billes. La partie 12A du premier cylindre 12 peut donc avoir une épaisseur jusqu'à 70% du diamètre D des billes. Il peut n'y avoir qu'un faible espace entre ladite partie 12A et le bourrelet périphérique 16 sur lequel prennent appui les billes 17. Comme illustré sur la figure 4, le jeu entre les billes et la partie annulaire 12B permet que le diamètre minimal G de l'ouverture 18 soit supérieur au diamètre D des billes, même lorsque I' espace entre la partie 12A du premier cylindre 12 et le bourrelet périphérique 16 est réduit au minimum.Figure 1, in the closed position of the circuit breaker, the piston 8 is moved away from the cylinder head formed by the crown 5 at the end of the compression chamber opposite the piston, and the balls 17 resting on the bead 16 are engaged in the grooves 19 of the second cylinder 13. The telescopic link 11 is then locked in its deployed position. During the first part of an opening operation, contact 1 is moved in a certain direction in direction A, here to the right, and the contact 9 is moved in the opposite direction in direction A, here towards the left as indicated by the arrows. We can note that this mutual displacement of the contacts can also be ensured by a thrust of the operating mechanism, not shown in the figures, on the second cylinder 13. The telescopic link 11 is then locked by the balls 17 which transmit the thrust from the second cylinder 13 to the part 12A of the first cylinder 12 which is extended by the piston 8. From this done, the piston 8 is moved in the opposite direction from contact 1 and therefore from cylinder head 5 so that when approaching each other, cylinder head 5 and the piston 8 compress the gas in the compression volume 4. We can note, as illustrated in FIG. 4, that the small annular part 12B of the first cylinder 12, located at the end of the cylinder opposite the piston, does not undergoes no effort from the balls, so that play can exist between the balls and said annular part 12B. As for part 12A of the first cylinder 12, it comprises at the openings 18 of the housings each having a portion of spherical surface complementary to the surface of the ball bearing against this housing, in order to limit the contact pressures exerted by the balls on said part 12A during gas compression. In order to limit the stresses on the connection telescopic 11 at the balls 17, the depth of the grooves 19 of the second cylinder 13 is typically between 30% and 50% of the diameter D of the balls. The part 12A of the first cylinder 12 can therefore have a thickness up to 70% of the diameter D of the balls. There can have only a small space between said part 12A and the bead device 16 on which the balls 17 bear. As illustrated in FIG. 4, the play between the balls and the annular part 12B allows that the minimum diameter G of the opening 18 is greater than the diameter D of the balls, even when the space between the part 12A of the first cylinder 12 and the peripheral bead 16 is reduced to a minimum.

    Figure 2, quand le piston 8 arrive en butée contre la culasse 5 à la fin de la compression du gaz, les billes 17 sont positionnées à une extrémité du bourrelet 16 et s'effacent de la gorge 19 pour libérer le verrouillage de la liaison télescopique 11 qui peut se rétracter, comme illustré sur les figures 5 et 6. Ainsi, après la fin de la compression du gaz, le piston 8 est poussé par la culasse 5 et est déplacé dans le même sens que le contact 1, c'est à dire en sens contraire du contact 9.Figure 2, when the piston 8 abuts against the cylinder head 5 to the end of gas compression, the balls 17 are positioned at a end of the bead 16 and disappear from the groove 19 to release the locking of the telescopic link 11 which can retract, as illustrated in FIGS. 5 and 6. Thus, after the end of gas compression, the piston 8 is pushed by the cylinder head 5 and is moved in the same direction as contact 1, that is to say in the opposite direction to contact 9.

    Figure 3, le disjoncteur est en fin d'ouverture et la distance d'isolement d entre les deux contacts 1 et 9 est atteinte.Figure 3, the circuit breaker is at the end of opening and the distance insulation d between the two contacts 1 and 9 is reached.

    La longueur L du volume de compression 4 suivant la direction A est sensiblement égale à la longueur R de la zone de recouvrement des contacts, ainsi qu'à la longueur du déplacement des billes 17 sur le bourrelet 16. La distance d'isolement d entre les deux contacts 1 et 9 est par ailleurs sensiblement égale à la longueur du déplacement relatif du second cylindre 13 par rapport au cylindre 12 suivant la direction A.The length L of the compression volume 4 in the direction A is substantially equal to the length R of the overlap area of the contacts, as well as the length of movement of the balls 17 on the bead 16. The insulation distance d between the two contacts 1 and 9 is otherwise substantially equal to the length of the relative displacement of the second cylinder 13 relative to cylinder 12 in direction A.

    La figure 7 illustre une variante de réalisation d'un disjoncteur à double mouvement des contacts d'après l'invention. Une partie de l'opération de compression du gaz du volume de compression s'effectue avant le commencement de la phase de mise en mouvement des premier et second contacts, laquelle est retardée par rapport au déclenchement de l'ouverture de l'interrupteur pour permettre au piston d'avoir parcouru une distance Δ lorsque le mouvement des contacts est enclenché. Le retard au déplacement des premier et second contacts est procuré par deux systèmes d'inserts télescopiques 20 et 21 qui séparent respectivement le premier contact 1 et la liaison périphérique 14 chacun en deux parties selon la direction longitudinale (A). Chaque système d'insert permet ainsi d'introduire un certain débattement longitudinal entre les deux parties du même élément qu'il sépare. Pour la compréhension du principe, la figure 7 est représentée avec un jeu Δ constitué d'un espace de gaz, mais d'autres variantes peuvent être envisagées. Par exemple, les inserts 20 et 21 peuvent consister chacun en un ressort joignant les deux parties qu'il sépare. Des systèmes de blocage des premier et second contacts doivent alors être mis en place de façon à maintenir immobiles ces contacts tant que le déplacement du piston 8 dans le volume 4 n'a pas atteint la longueur Δ souhaitée. Un système de renvoi de mouvement, par exemple depuis les cylindres 12 ou 13 de la liaison télescopique 11, peut déverrouiller ces systèmes de blocage dès que la longueur Δ est atteinte, les ressorts étant alors comprimés, pour permettre la mise en mouvement des premier et second contacts avec une accélération importante.FIG. 7 illustrates an alternative embodiment of a circuit breaker with double movement of the contacts according to the invention. A part of the gas compression operation of the compression volume is carried out before the start of the first movement phase and second contacts, which is delayed in relation to tripping opening the switch to allow the piston to travel a distance Δ when the movement of the contacts is engaged. The delay in moving the first and second contacts is provided by two telescopic insert systems 20 and 21 which separate respectively the first contact 1 and the peripheral link 14 each in two parts in the longitudinal direction (A). Each system insert allows to introduce a certain longitudinal travel between the two parts of the same element that it separates. For understanding in principle, Figure 7 is shown with a clearance Δ consisting of gas space, but other variants can be envisaged. Through example, the inserts 20 and 21 may each consist of a spring joining the two parts it separates. Blocking systems first and second contacts must then be set up so that keep these contacts stationary as long as the piston 8 moves in volume 4 has not reached the desired length Δ. A system of movement return, for example from cylinders 12 or 13 of the telescopic link 11, can unlock these locking systems as soon as that the length Δ is reached, the springs then being compressed, to allow the setting in motion of the first and second contacts with a significant acceleration.

    Ce dispositif permet d'augmenter le volume de compression, au détriment du temps de séparation des contacts qui augmente, ainsi que la masse des éléments mobiles. A volume de compression équivalent, on peut diminuer la distance R de recouvrement des premier et second contacts en augmentant Δ.This device increases the compression volume, at detriment of the contact separation time which increases, as well as the mass of the moving parts. At equivalent compression volume, we can decrease the overlap distance R of the first and second contacts by increasing Δ.

    Figure 9, le retard au déplacement des premier et second contacts est ici procuré par des moyens consistant en un seul système d'inserts télescopiques, tels que des ressorts 26, permettant d'introduire un certain débattement longitudinal entre le second cylindre 13 et la liaison périphérique 14. Cette dernière peut être prolongée par une partie cylindrique 14A entourant le second cylindre 13 et pouvant coulisser le long de celui-ci, par exemple grâce à des roulements à billes. Le mécanisme pivotant 10 permettant de coordonner les mouvements des premier et second contacts traverse le second cylindre 13 par des ouvertures longitudinales prévues à cet effet. Dans ce dispositif, le mécanisme de manoeuvre du disjoncteur, non représenté, est relié au second cylindre 13 et agit en poussée dans le sens de la flèche sur la figure lors de l'ouverture du disjoncteur. Le système de blocage des premier et second contacts peut ici être réalisé par un dispositif unique 30, consistant par exemple en un bras pivotant verrouillable 31 retenant la liaison périphérique 14 par un ergot, ce bras pouvant être déverrouillé de façon connue par la poussée du second cylindre 13 sur un élément 32 commandant le mouvement dudit bras, dès que ledit second cylindre a parcouru une distance Δ.Figure 9, the delay in moving the first and second contacts is here provided by means consisting of a single system of inserts telescopic, such as springs 26, allowing to introduce a certain longitudinal travel between the second cylinder 13 and the link peripheral 14. The latter can be extended by a part cylindrical 14A surrounding the second cylinder 13 and capable of sliding the along it, for example thanks to ball bearings. The pivoting mechanism 10 for coordinating the movements of the first and second contacts pass through the second cylinder 13 by longitudinal openings provided for this purpose. In this device, the circuit breaker operating mechanism, not shown, is connected to the second cylinder 13 and acts in thrust in the direction of the arrow on the figure when opening the circuit breaker. The blocking system first and second contacts can here be achieved by a single device 30, consisting for example of a lockable pivoting arm 31 retaining the peripheral link 14 by a lug, this arm being able to be unlocked in a known manner by the thrust of the second cylinder 13 on an element 32 controlling the movement of said arm, as soon as said second cylinder has traveled a distance Δ.

    La figure 8 représente un disjoncteur dont les moyens constitutifs sont équivalent à ceux du disjoncteur décrit aux figures 1 et 3, à l'exception des moyens de manoeuvre 25 du second contact qui sont séparés des moyens 24 manoeuvrant le premier contact. Dans le dispositif représenté, la course L du piston 8 durant la phase de compression du gaz est égale à la distance R de recouvrement des premier et second contacts. Il est aussi possible d'obtenir une longueur de compression L supérieure à R en séparant le premier contact 1 en deux parties par un système d'inserts télescopiques 20 tel que représenté à la figure 7. Les moyens de manoeuvre 25 seront alors actionnés avec un certain retard par rapport aux moyens 24, en fonction du débattement Δ procuré par ledit système d'inserts, de façon à synchroniser les déplacements des premier et second contacts.FIG. 8 represents a circuit breaker whose constituent means are equivalent to those of the circuit breaker described in Figures 1 and 3, with the exception of the operating means 25 of the second contact which are separated from the means 24 operating the first contact. In the device shown, the stroke L of the piston 8 during the phase of gas compression is equal to the distance R of overlap of first and second contacts. It is also possible to obtain a length compression L greater than R by separating the first contact 1 into two parts by a system of telescopic inserts 20 as shown in Figure 7. The operating means 25 will then be actuated with a certain delay with respect to the means 24, depending on the travel Δ provided by said system of inserts, so as to synchronize the displacements of the first and second contacts.

    Enfin, il est aussi possible de réaliser un disjoncteur possédant un simple mouvement de contact et tel que la course L dudit piston dans le volume de compression durant la phase de compression du gaz soit au moins égale à deux fois la distance R de recouvrement du contact mobile avec le contact fixe. En effet, au vu du dispositif à double mouvement des contacts décrit figure 8, les moyens de manoeuvre 25 peuvent être supprimés pour rendre le second contact fixe. Ainsi, la séparation des contacts a lieu lorsque le premier contact s'est déplacé d'une distance égale à la distance R de recouvrement, c'est à dire aussi lorsque le piston s'est déplacé d'une distance R. Le déplacement relatif du piston 8 par rapport à la culasse 5 du volume de compression, c'est à dire la longueur L de compression, est alors égal à deux fois à la distance R de recouvrement, voire supérieur à 2 x R si le contact 1 est séparé en deux parties par un système d'inserts télescopiques 20 tel que représenté à la figure 7.Finally, it is also possible to make a circuit breaker having a simple contact movement and such as the stroke L of said piston in the compression volume during the gas compression phase, i.e. less than twice the distance R of the mobile contact with the fixed contact. Indeed, in view of the double movement device of the contacts described in Figure 8, the operating means 25 can be deleted to make the second contact fixed. So the separation of contacts takes place when the first contact has moved a distance equal to the overlap distance R, i.e. also when the piston has moved a distance R. The relative movement of piston 8 relative to the cylinder head 5 of the compression volume, i.e. the compression length L, then equals twice the distance R of overlap, or even greater than 2 x R if contact 1 is split in two parts by a system of telescopic inserts 20 as shown in the figure 7.

    En comparaison, comme mentionné dans le préambule, les dispositifs connus de l'art antérieur ne permettent d'obtenir que L typiquement compris entre R et 1,25 x R.In comparison, as mentioned in the preamble, the known devices of the prior art allow only L to be obtained typically between R and 1.25 x R.

    Claims (11)

    1. A gas blast switch possessing a break chamber with low gas compression, the switch comprising a first contact (1) and a second contact (9), the first contact being movable along a longitudinal axis (A) and being secured to the break chamber (2) in which the gas is compressed by a piston (8), displacement means for displacing said piston being arranged so that its movement changes direction inside the case of the switch after the gas compression stage, the switch being characterized in that:
      said displacement means comprise a telescopic link (11) connected to said piston, and in that the length of the displacement of said piston inside said case during said compression stage is not less than the length of the displacement of said first contact during said same compression stage;
      the telescopic link (11) is formed by a first cylinder (12) extending the piston and surrounded by a second cylinder (13) the second cylinder being fixed to a peripheral link (14) that is permanently secured to the second contact, said telescopic fink comprising a locking assembly that unlocks at the end of the gas compression stroke to allow the movement of the piston to change direction and to follow the movement of the first contact after the first and second contacts have separated; and
      said locking assembly consists of balls (17) disposed in openings (18) formed in the first cylinder (12), said balls being engaged in internal peripheral grooves (19) of the second cylinder (13) during the gas compression stage in order to lock said telescopic link.
    2. The switch of claim 1, in which said second contact is movable along said longitudinal axis (A) in the opposite direction to said first contact.
    3. The switch of claim 2, in which said piston (8) is connected in alternation with the second contact and with the first contact during the operation of opening the switch.
    4. The switch of claim 3, in which said piston is secured to the second moving contact by means of the telescopic link (11) throughout the gas compression stage, and is separated therefrom after said first and second contacts have separated so as to become secured to said first contact.
    5. The switch of claim 6, in which the depth of said peripheral grooves lies in the range 30% to 50% of the diameter D of the balls.
    6. The switch of claim 1 or 5, in which the cylindrical portion (12A) of the first cylinder (12) has housings level with the openings (18), each housing presenting a spherical surface portion complementary to the surface of the ball bearing against said housing so as to limit the contact pressure exerted by the balls against said portion (12A) during gas compression.
    7. The switch of claim 1, in which a portion of the operation of compressing the gas in the compression volume takes place before the stage in which the first contact is set into motion, with this being delayed relative to opening of the circuit breaker being triggered in order to allow the piston already to have traveled a certain distance when the movement of the first contact is engaged.
    8. The switch of claims 1 and 7, in which the delay before said opening stage begins is obtained by means consisting in two telescopic insert systems (20, 21) respectively subdividing the first contact (1) and the peripheral link (14) so that each of them forms two portions along the longitudinal axis (A), each insert system enabling a certain amount of relative movement to take place longitudinally between the two portions of the element it subdivides.
    9. The switch of claims 1 and 7, in which the delay in the beginning of said opening stage is obtained by means consisting in a telescopic insert system (26) accommodate a certain amount of longitudinal relative movement between the second cylinder (13) and the peripheral link (14).
    10. The switch of claim 1, in which said second contact is fixed in said case and in which the stroke L of said piston in the compression volume during the gas compression stage is not less than twice the overlap distance R of the moving contact and the fixed contact.
    11. The switch of any one of claims 1, and 5 to 10, in which the first contact is connected to the second cylinder (13) of the telescopic link (11) by a pivoting lever mechanism (10) enabling said first contact and second cylinder to move at the same speed in opposite directions.
    EP01400884A 2000-04-18 2001-04-05 Gas-blast switch having an arc chamber with reduced gas compression and an alternatively moving piston Expired - Lifetime EP1148527B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0004987A FR2807870B1 (en) 2000-04-18 2000-04-18 ARC BLOWER SWITCH HAVING REDUCED GAS COMPRESSION CUTTING CHAMBER AND RECIPROCATING PISTON MOVEMENT
    FR0004987 2000-04-18

    Publications (2)

    Publication Number Publication Date
    EP1148527A1 EP1148527A1 (en) 2001-10-24
    EP1148527B1 true EP1148527B1 (en) 2004-12-15

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    EP01400884A Expired - Lifetime EP1148527B1 (en) 2000-04-18 2001-04-05 Gas-blast switch having an arc chamber with reduced gas compression and an alternatively moving piston

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    EP (1) EP1148527B1 (en)
    AT (1) ATE285116T1 (en)
    CA (1) CA2344256C (en)
    DE (1) DE60107747T2 (en)
    FR (1) FR2807870B1 (en)

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    Publication number Priority date Publication date Assignee Title
    DE502004011745D1 (en) * 2004-08-23 2010-11-18 Abb Technology Ag Switching chamber and high power switch
    ATE349067T1 (en) * 2004-08-23 2007-01-15 Abb Technology Ag HIGH PERFORMANCE SWITCH WITH REVERSAL MOTION
    FR2877136B1 (en) * 2004-10-27 2006-12-15 Areva T & D Sa TRAINING CINEMATICS IN A HYBRID CIRCUIT BREAKER
    FR2924267A1 (en) * 2007-11-22 2009-05-29 Areva T & D Sa HIGH VOLTAGE CIRCUIT BREAKER WITH IMPROVED GAS EXHAUST
    FR2947377B1 (en) * 2009-06-29 2011-07-22 Areva T & D Sa DISCHARGE VALVE VALVE FOR DISCHARGING A DIELECTRIC GAS BETWEEN TWO VOLUMES OF A HIGH OR MEDIUM VOLTAGE BREAKER BREAK CHAMBER
    US9035211B2 (en) 2011-07-20 2015-05-19 Pennsylvania Breaker, Llc Gas blast interrupter
    JP6289856B2 (en) * 2013-10-16 2018-03-07 株式会社東芝 Gas circuit breaker

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    Publication number Priority date Publication date Assignee Title
    US3331935A (en) * 1964-12-21 1967-07-18 Westinghouse Electric Corp Gas-blast circuit breaker having dual piston means providing double-acting puffer arrangement
    DE3930548C2 (en) * 1989-09-13 1994-05-19 Licentia Gmbh Gas pressure switch
    FR2683383B1 (en) * 1991-11-04 1993-12-31 Gec Alsthom Sa HIGH OR MEDIUM VOLTAGE CIRCUIT BREAKER WITH TRIPLE MOTION.
    ATE176082T1 (en) * 1995-05-04 1999-02-15 Ansaldo Ind S P A HIGH VOLTAGE SWITCH USING SELF-BLOWING DIELECTRIC GAS
    FR2753564B1 (en) * 1996-09-17 1998-11-27 Gec Alsthom T & D Sa CIRCUIT BREAKER WITH SELF-BLOWING AND REDUCED COMPRESSION
    FR2766609B1 (en) * 1997-07-24 1999-09-24 Gec Alsthom T & D Sa GAS SWITCH WITH COMPRESSIBLE THERMAL EXPANSION VOLUME
    FR2767221B1 (en) * 1997-08-11 1999-09-10 Gec Alsthom T & D Sa SELF-BLOWING AND REDUCED COMPRESSION CIRCUIT BREAKER

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    Publication number Publication date
    FR2807870A1 (en) 2001-10-19
    FR2807870B1 (en) 2002-05-24
    CA2344256C (en) 2003-11-11
    EP1148527A1 (en) 2001-10-24
    US6489581B2 (en) 2002-12-03
    DE60107747D1 (en) 2005-01-20
    CA2344256A1 (en) 2001-10-18
    US20010035396A1 (en) 2001-11-01
    ATE285116T1 (en) 2005-01-15
    DE60107747T2 (en) 2006-02-23

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