EP0884745B1 - Circuit breaker with closing resistor - Google Patents

Circuit breaker with closing resistor Download PDF

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Publication number
EP0884745B1
EP0884745B1 EP98401355A EP98401355A EP0884745B1 EP 0884745 B1 EP0884745 B1 EP 0884745B1 EP 98401355 A EP98401355 A EP 98401355A EP 98401355 A EP98401355 A EP 98401355A EP 0884745 B1 EP0884745 B1 EP 0884745B1
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EP
European Patent Office
Prior art keywords
contacts
circuit breaker
semi
contact
arcing
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP98401355A
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German (de)
French (fr)
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EP0884745A1 (en
Inventor
Michel Perret
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Grid Solutions SAS
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Alstom T&D SA
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Publication of EP0884745A1 publication Critical patent/EP0884745A1/en
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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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/16—Impedances connected with contacts
    • H01H33/166—Impedances connected with contacts the impedance being inserted only while closing the switch

Definitions

  • the invention relates to a circuit breaker comprising a first contact permanent and a first arcing contact fixedly mounted in an enclosure, a second permanent contact and a second arcing contact mounted mobile in the envelope in a certain longitudinal direction and intended to cooperate with the first fixed contacts and a resistor insertion system closing, the second movable contacts being part of a crew carrying a blowing nozzle.
  • the object of the invention is to propose a system for inserting the closing resistance for such a circuit breaker which is of a simple design and which allows to obtain a good compactness of the assembly with a minimum moving parts.
  • Document DE 3 411 445 describes a circuit breaker according to the preamble of claim 1.
  • the invention relates to such a circuit breaker characterized in that than the first permanent contact is fixed and the resistance insertion system wear one third arcing contact intended to cooperate with a fourth fixed arcing contact connected to the fixed permanent contact, this semi-mobile block by its displacement, bringing the third and fourth arcing contacts closer to each other to short-circuit this closing resistance while said first and second arcing contacts are connected to each other and that the permanent contacts are separated from each other, these permanent contacts being connected to each other only after the third and fourth arcing contacts are themselves connected to each other.
  • the semi-mobile block has a conical end which fits into the tulip-shaped blowing nozzle during the closing operation of the breaker. In this way, the effects of the shock between the nozzle and the block are eliminated. semi-mobile when they come into contact with each other and we get a movement speed of the semi-mobile unit identical to that of the first movable contacts when the circuit breaker closes.
  • the semi-movable block has a tubular shape and has a spring which is compressed on closing of the circuit breaker and a chamber that fills with gas during this closing operation so that when the circuit breaker opens, the spring when expanding automatically moves the semi-movable block in the direction of movement of the first arcing contacts and permanent to separate the third and fourth arcing contacts.
  • the displacement of this semi-mobile block the opening of the circuit breaker is delayed and slowed down compared to displacement of the first arcing contacts and permanent because the spring relaxation is accompanied by a necessary evacuation of gas from the chamber by calibrated openings.
  • circuit breaker An exemplary embodiment of the circuit breaker according to the invention is described below in more detail and illustrated in the drawings.
  • Figure 1 very schematically shows a circuit breaker according to the invention in the fully open position.
  • Figure 2 very schematically shows the circuit breaker of Figure 1 in a first intermediate closed position.
  • Figure 3 shows very schematically the circuit breaker of Figure 1 in a second intermediate closed position.
  • Figure 4 very schematically shows the circuit breaker of Figure 1 in a fully closed position.
  • Figure 5 shows very schematically the circuit breaker of Figure 1 in a first intermediate opening position.
  • Figure 6 shows very schematically the circuit breaker of Figure 1 in a second intermediate opening position.
  • the circuit breaker partially shown in the figures includes a insulating casing 1 of cylindrical shape, for example of porcelain, which delimits an interior volume 2 intended to be filled with a dielectric gas as SF6 under a pressure of a few bars.
  • This circuit breaker is a single movement circuit breaker, i.e. with a single movable equipment of arcing contacts and permanent, and includes a insertion system of a closing resistor whose arrangement allows simply check the duration of insertion of the closing resistance of the circuit breaker, this resistor should not be inserted when the breaker.
  • the closing resistor 4 consists of a stack of resistors housed in an insulating support 5 placed inside the enclosure to one end of it. Closing resistor 4 is in electrical contact with a metal block 6 on which is fixed a metal rod 7 which extends axially in the envelope. In the embodiment shown in the figures, the closing resistor 4 extends axially in the envelope but one could also provide an eccentric arrangement of this resistance in the envelope without departing from the scope of the invention.
  • the fixed arcing contact 8 is disposed at the free end of the rod 7.
  • the fixed permanent contact 9 is arranged at one end of a metal tube 9A arranged coaxially around the rod 7.
  • An insulating cone 10 is provided so optional to hold the rod 7 inside the tube 9A.
  • the closing resistor 4 insertion system comprises a block semi-mobile metallic 14 of tubular shape which is mounted to be able slide on the rod 7, that is to say along the axis 3.
  • This semi-mobile block 14 is electrically connected to the rod 7 by sliding contacts 17. It carries a arcing contact 15 subsequently called first switching contact in the form of tulip which is intended to cooperate with another arcing contact 16 in the form ring (hereinafter called second switching contact) disposed at inside the cylindrical tube 9A and electrically connected thereto.
  • the arrangement of the resistance insertion system is essentially arranged axially in the envelope which can therefore have a relatively small diameter.
  • the semi-mobile block 14 has one end, which faces the blowing nozzle 13, cone-shaped adapted to come fit into the nozzle.
  • the other end face (left face on the figures) of the semi-mobile block 14 closes behind a compression piston 18 which is constituted by a crown secured to the rod 7.
  • a spring 20 is mounted between the piston 18 and a shoulder located at rear of the conical end of the semi-movable block.
  • the space defined between this piston and this other end face constitutes a chamber 19 with volume variable.
  • Chamber 19 in the semi-mobile block communicates with the volume inside the tube 9A by openings 21.
  • FIG. 1 the circuit breaker is in the fully open position.
  • the fixed contacts 8 and 9 are separated from mobile contacts 11 and 12.
  • Contact 15 is separated from contact 16.
  • the spring 20 in the semi-movable block is completely relaxed and the space between the piston 18 and the left face of the semi-mobile block is minimum.
  • the arcing contacts 8 and 11 are less distant by construction from each other than permanent contacts 9 and 12 ce which means that when the circuit breaker closes, the contacts 8 and 11 are connected mutually before contacts 9 and 12.
  • the contacts of switching 15 and 16 are distant from each other by a distance such that these contacts connect to each other after connecting the arcing contacts but before the connection of the permanent contacts which allows control, via the displacement of the semi-mobile block, the duration of the insertion of the resistor 4 at the closing as we will see later.
  • the chamber 19 is filled gas passing through the openings 21.
  • the arcing contacts 8 and 11 are connected to each other while the switching contacts 15 and 16 are just close enough to each other to that an electric arc 22 can be created between them without an electric arc can be created between permanent contacts 9 and 12. Indeed, the latter are at this time distant from each other by a greater distance than that separating the switching contacts.
  • the closing resistance 4 is short-circuited since the current flows between the arcing contacts 11 and 8, in the rod 7, in the sliding contacts 17, in the semi-mobile block 14, in switching contact 15, in switching contact 16 and in the tube 9A.
  • the movable contacts 11 and 12 are move from left to right in the figures. Permanent contacts 9 and 12 separate first from each other, then then the arcing contacts 8 and 11 but the switching contacts 15 and 16 always remain connected for some time to each other as shown in Figures 5 and 6 because the block semi-mobile moves more slowly than mobile contacts. In fact, the block semi-mobile moves from left to right in the figures by the action of the spring 20 which exerts a restoring force by relaxing against the piston 18.
  • the relaxation of the spring 20 is delayed and slowed down by the fact that a force opposite of resistance opposes the restoring force exerted by the spring, this contrary force resulting from the necessary compression of gas in the chamber 19 whose volume decreases as the semi-mobile block moves because the gas exhaust openings in this chamber are calibrated so adequate.
  • This calibration is such that the switching contacts 15 and 16 are only separate from each other after complete separation of the contacts arc. In this way, the short-circuit current cannot pass through the closing resistor 4 when opening the circuit breaker. It's only when the electric arc created between the arcing contacts is blown out in particular that the semi-mobile block 14 finishes its race to separate the contacts 15 and 16 and return to its initial position illustrated in FIG. 1.

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  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Keying Circuit Devices (AREA)
  • Cookers (AREA)

Abstract

The resistive closing mechanism has a semi-mobile block which moves along an axial direction and pushes a set of two arc contacts (15,16) into place. A set of two further arc contacts are pushed forward in sequence, ending with these contacts (8,11) connecting permanent contacts (9,12). There is a venting tube (13) is in the first and second contact area.

Description

L'invention concerne un disjoncteur comprenant un premier contact permanent et un premier contact d'arc montés fixes dans une enveloppe, un second contact permanent et un second contact d'arc montés mobiles dans l'enveloppe suivant une certaine direction longitudinale et destinés à coopérer avec les premiers contacts fixes ainsi qu'un système d'insertion d'une résistance de fermeture, les seconds contacts mobiles faisant partie d'un équipage portant une buse de soufflage.The invention relates to a circuit breaker comprising a first contact permanent and a first arcing contact fixedly mounted in an enclosure, a second permanent contact and a second arcing contact mounted mobile in the envelope in a certain longitudinal direction and intended to cooperate with the first fixed contacts and a resistor insertion system closing, the second movable contacts being part of a crew carrying a blowing nozzle.

Le but de l'invention est de proposer un système d'insertion de la résistance de fermeture pour un tel disjoncteur qui soit d'une conception simple et qui permette d'obtenir une bonne compacité de l'ensemble avec un minimum de pièces en mouvement.The object of the invention is to propose a system for inserting the closing resistance for such a circuit breaker which is of a simple design and which allows to obtain a good compactness of the assembly with a minimum moving parts.

Le document DE 3 411 445 décrit un disjoncteur selon le préambule de la revendication 1.Document DE 3 411 445 describes a circuit breaker according to the preamble of claim 1.

A cet effet, l'invention a pour objet un tel disjoncteur caractérisé en ce que le premier contact permanent est fixe et le système d'insertion de la résistance porte un troisième contact d'arc destiné à coopérer avec un quatrième contact d'arc fixe relié au contact permanent fixe, ce bloc semi-mobile par son déplacement, rapprochant les troisième et quatrième contacts d'arc l'un de l'autre pour court-circuiter cette résistance de fermeture alors que lesdits premier et second contacts d'arc sont connectés l'un à l'autre et que les contacts permanents sont séparés l'un de l'autre, ces contacts permanents étant connectés l'un à l'autre seulement après que les troisième et quatrième contacts d'arc soient eux mêmes connectés l'un à l'autre.To this end, the invention relates to such a circuit breaker characterized in that than the first permanent contact is fixed and the resistance insertion system wear one third arcing contact intended to cooperate with a fourth fixed arcing contact connected to the fixed permanent contact, this semi-mobile block by its displacement, bringing the third and fourth arcing contacts closer to each other to short-circuit this closing resistance while said first and second arcing contacts are connected to each other and that the permanent contacts are separated from each other, these permanent contacts being connected to each other only after the third and fourth arcing contacts are themselves connected to each other.

Selon un mode de réalisation avantageux de l'invention, le bloc semi-mobile comporte une extrémité de forme conique qui vient s'emboíter dans la buse de soufflage en forme de tulipe lors de l'opération de fermeture du disjoncteur. De la sorte, on supprime les effets du choc entre la buse et le bloc semi-mobile lorsqu'ils entrent en contact l'un avec l'autre et on obtient une vitesse de déplacement du bloc semi-mobile identique à celle des premiers contacts mobiles à la fermeture du disjoncteur.According to an advantageous embodiment of the invention, the semi-mobile block has a conical end which fits into the tulip-shaped blowing nozzle during the closing operation of the breaker. In this way, the effects of the shock between the nozzle and the block are eliminated. semi-mobile when they come into contact with each other and we get a movement speed of the semi-mobile unit identical to that of the first movable contacts when the circuit breaker closes.

Le bloc semi-mobile a une forme tubulaire et comporte un ressort qui est comprimé à la fermeture du disjoncteur et une chambre qui se remplit de gaz pendant cette opération de fermeture de sorte qu'à l'ouverture du disjoncteur, le ressort en se détendant déplace automatiquement le bloc semi-mobile dans le sens de déplacement des premiers contacts d'arc et permanent pour séparer les troisième et quatrième contacts d'arc. Toutefois, le déplacement de ce bloc semi-mobile à l'ouverture du disjoncteur est retardé et ralenti par rapport au déplacement des premiers contacts d'arc et permanent car la détente du ressort s'accompagne d'une nécessaire évacuation de gaz de la chambre par des ouvertures calibrées.The semi-movable block has a tubular shape and has a spring which is compressed on closing of the circuit breaker and a chamber that fills with gas during this closing operation so that when the circuit breaker opens, the spring when expanding automatically moves the semi-movable block in the direction of movement of the first arcing contacts and permanent to separate the third and fourth arcing contacts. However, the displacement of this semi-mobile block the opening of the circuit breaker is delayed and slowed down compared to displacement of the first arcing contacts and permanent because the spring relaxation is accompanied by a necessary evacuation of gas from the chamber by calibrated openings.

Un exemple de réalisation du disjoncteur selon l'invention est décrit ci-après plus en détails et illustrés sur les dessins.An exemplary embodiment of the circuit breaker according to the invention is described below in more detail and illustrated in the drawings.

La figure 1 montre de façon très schématique un disjoncteur selon l'invention en position d'ouverture complète.Figure 1 very schematically shows a circuit breaker according to the invention in the fully open position.

La figure 2 montre de façon très schématique le disjoncteur de la figure 1 dans une première position intermédiaire de fermeture.Figure 2 very schematically shows the circuit breaker of Figure 1 in a first intermediate closed position.

La figure 3 montre de façon très schématique le disjoncteur de la figure 1 dans une seconde position intermédiaire de fermeture.Figure 3 shows very schematically the circuit breaker of Figure 1 in a second intermediate closed position.

La figure 4 montre de façon très schématique le disjoncteur de la figure 1 dans une position de fermeture complète.Figure 4 very schematically shows the circuit breaker of Figure 1 in a fully closed position.

La figure 5 montre de façon très schématique le disjoncteur de la figure 1 dans une première position intermédiaire d'ouverture.Figure 5 shows very schematically the circuit breaker of Figure 1 in a first intermediate opening position.

La figure 6 montre de façon très schématique le disjoncteur de la figure 1 dans une seconde position intermédiaire d'ouverture.Figure 6 shows very schematically the circuit breaker of Figure 1 in a second intermediate opening position.

Le disjoncteur représenté partiellement sur les figures comprend une enveloppe isolante 1 de forme cylindrique, par exemple en porcelaine, qui délimite un volume intérieur 2 destiné à être rempli d'un gaz diélectrique comme du SF6 sous une pression de quelques bars.The circuit breaker partially shown in the figures includes a insulating casing 1 of cylindrical shape, for example of porcelain, which delimits an interior volume 2 intended to be filled with a dielectric gas as SF6 under a pressure of a few bars.

Ce disjoncteur est un disjoncteur à simple mouvement, c'est-à-dire avec un seul équipage mobile de contacts d'arc et permanent, et comprend un système d'insertion d'une résistance de fermeture dont l'agencement permet de contrôler de façon simple la durée de l'insertion de la résistance à la fermeture du disjoncteur, cette résistance ne devant pas être insérée à l'ouverture du disjoncteur.This circuit breaker is a single movement circuit breaker, i.e. with a single movable equipment of arcing contacts and permanent, and includes a insertion system of a closing resistor whose arrangement allows simply check the duration of insertion of the closing resistance of the circuit breaker, this resistor should not be inserted when the breaker.

La résistance de fermeture 4 est constituée d'un empilement de résistances logées dans un support isolant 5 placé à l'intérieur de l'enveloppe à une extrémité de celle-ci. La résistance de fermeture 4 est en contact électrique avec un bloc métallique 6 sur lequel est fixée une tige métallique 7 qui s'étend axialement dans l'enveloppe. Dans la réalisation montrée sur les figures, la résistance de fermeture 4 s'étend axialement dans l'enveloppe mais on pourrait prévoir aussi une disposition excentrée de cette résistance dans l'enveloppe sans sortir du cadre de l'invention. The closing resistor 4 consists of a stack of resistors housed in an insulating support 5 placed inside the enclosure to one end of it. Closing resistor 4 is in electrical contact with a metal block 6 on which is fixed a metal rod 7 which extends axially in the envelope. In the embodiment shown in the figures, the closing resistor 4 extends axially in the envelope but one could also provide an eccentric arrangement of this resistance in the envelope without departing from the scope of the invention.

Le contact d'arc fixe 8 est disposé à l'extrémité libre de la tige 7. Le contact permanent fixe 9 est disposé à une extrémité d'un tube métallique 9A disposé coaxialement autour de la tige 7. Un cône isolant 10 est prévu de façon facultative pour maintenir la tige 7 à l'intérieur du tube 9A. Ces deux contacts 8 et 9 coopèrent avec des contacts d'arc 11 et permanent 12 faisant partie d'un équipage mobile suivant l'axe 3 et portant une buse de soufflage 13 en forme de tulipe.The fixed arcing contact 8 is disposed at the free end of the rod 7. The fixed permanent contact 9 is arranged at one end of a metal tube 9A arranged coaxially around the rod 7. An insulating cone 10 is provided so optional to hold the rod 7 inside the tube 9A. These two contacts 8 and 9 cooperate with arcing contacts 11 and permanent 12 forming part of a moving element along axis 3 and carrying a blowing nozzle 13 in the form of tulip.

Le système d'insertion de la résistance de fermeture 4 comprend un bloc métallique semi-mobile 14 de forme tubulaire qui est monté pour pouvoir coulisser sur la tige 7, c'est-à-dire suivant l'axe 3. Ce bloc semi-mobile 14 est relié électriquement à la tige 7 par des contacts coulissants 17. Il porte un contact d'arc 15 appelé par la suite premier contact de commutation en forme de tulipe qui est destiné à coopérer avec un autre contact d'arc 16 en forme d'anneau (appelé par la suite second contact de commutation) disposé à l'intérieur du tube cylindrique 9A et relié électriquement à celui-ci.The closing resistor 4 insertion system comprises a block semi-mobile metallic 14 of tubular shape which is mounted to be able slide on the rod 7, that is to say along the axis 3. This semi-mobile block 14 is electrically connected to the rod 7 by sliding contacts 17. It carries a arcing contact 15 subsequently called first switching contact in the form of tulip which is intended to cooperate with another arcing contact 16 in the form ring (hereinafter called second switching contact) disposed at inside the cylindrical tube 9A and electrically connected thereto.

On remarquera que l'agencement du système d'insertion de la résistance est essentiellement disposé de façon axiale dans l'enveloppe qui peut donc avoir un diamètre relativement réduit.Note that the arrangement of the resistance insertion system is essentially arranged axially in the envelope which can therefore have a relatively small diameter.

Comme visible sur les figures, le bloc semi-mobile 14 a une extrémité, qui fait face à la buse de soufflage 13, en forme de cône adaptée pour venir s'emboíter dans la buse. L'autre face d'extrémité (face de gauche sur les figures) du bloc semi-mobile 14 se referme en arrière d'un piston de compression 18 qui est constitué par une couronne solidaire de la tige 7.As visible in the figures, the semi-mobile block 14 has one end, which faces the blowing nozzle 13, cone-shaped adapted to come fit into the nozzle. The other end face (left face on the figures) of the semi-mobile block 14 closes behind a compression piston 18 which is constituted by a crown secured to the rod 7.

Un ressort 20 est monté entre le piston 18 et un épaulement situé en arrière de l'extrémité conique du bloc semi-mobile. L'espace défini entre ce piston et cette autre face d'extrémité constitue une chambre 19 à volume variable. La chambre 19 dans le bloc semi-mobile communique avec le volume intérieur du tube 9A par des ouvertures 21.A spring 20 is mounted between the piston 18 and a shoulder located at rear of the conical end of the semi-movable block. The space defined between this piston and this other end face constitutes a chamber 19 with volume variable. Chamber 19 in the semi-mobile block communicates with the volume inside the tube 9A by openings 21.

Le fonctionnement du système d'insertion de la résistance de fermeture du disjoncteur est le suivant.The operation of the closing resistance insertion system of the circuit breaker is as follows.

Figure 1, le disjoncteur est en position complètement ouverte. Les contacts fixes 8 et 9 sont séparés des contacts mobiles 11 et 12. Le contact 15 est séparé du contact 16. Le ressort 20 dans le bloc semi-mobile est complètement détendu et l'espace entre le piston 18 et la face de gauche du bloc semi-mobile est minimum. Figure 1, the circuit breaker is in the fully open position. The fixed contacts 8 and 9 are separated from mobile contacts 11 and 12. Contact 15 is separated from contact 16. The spring 20 in the semi-movable block is completely relaxed and the space between the piston 18 and the left face of the semi-mobile block is minimum.

Comme visible sur cette figure, les contacts d'arc 8 et 11 sont moins éloignés par construction l'un de l'autre que les contacts permanents 9 et 12 ce qui fait qu'à la fermeture du disjoncteur les contacts 8 et 11 se connectent mutuellement avant les contacts 9 et 12. Par ailleurs, les contacts de commutation 15 et 16 sont éloignés l'un de l'autre d'une distance telle que ces contacts se connectent mutuellement après la connexion des contacts d'arc mais avant la connexion des contacts permanents ce qui permet de contrôler, via le déplacement du bloc semi-mobile, la durée de l'insertion de la résistance 4 à la fermeture comme on le verra par la suite.As shown in this figure, the arcing contacts 8 and 11 are less distant by construction from each other than permanent contacts 9 and 12 ce which means that when the circuit breaker closes, the contacts 8 and 11 are connected mutually before contacts 9 and 12. In addition, the contacts of switching 15 and 16 are distant from each other by a distance such that these contacts connect to each other after connecting the arcing contacts but before the connection of the permanent contacts which allows control, via the displacement of the semi-mobile block, the duration of the insertion of the resistor 4 at the closing as we will see later.

Figure 2, lors d'une manoeuvre de fermeture du disjoncteur, les contacts d'arc et permanent mobiles 11 et 12 sont rapprochés des contacts d'arc et permanent fixes 8 et 9. Il se crée d'abord un arc électrique 21 entre les contacts d'arcs 11 et 8. Le courant passe d'une prise de courant du disjoncteur (non représentée à droite sur la figure) vers le contact d'arc 11, puis vers le contact d'arc 8, puis dans la tige 7, puis dans le bloc métallique 6, puis dans la résistance de fermeture 4, puis dans l'extrémité non représentée du tube 9A et dans l'autre prise de courant non représentée (à gauche sur la figure). La résistance de fermeture est donc insérée.Figure 2, during a closing operation of the circuit breaker, the contacts arc and permanent movable 11 and 12 are brought closer to the arcing contacts and permanent fixed 8 and 9. An electric arc 21 is first created between the contacts arcs 11 and 8. Current flows from a circuit breaker socket (not shown on the right in the figure) towards the arcing contact 11, then towards the contact arc 8, then in rod 7, then in metal block 6, then in closing resistance 4, then in the not shown end of the tube 9A and in the other socket not shown (on the left in the figure). The closing resistor is therefore inserted.

Figure 3, les contacts d'arc et permanent mobiles 11 et 12 continuent à se rapprocher des contacts d'arc et permanent fixes 8 et 9. L'extrémité de la buse 13 solidaire de l'équipage mobile vient alors s'emboíter sur l'extrémité conique du bloc semi-mobile et pousse ce dernier suivant l'axe 3 ce qui fait que les contacts de commutation 15 et 16 se rapprochent aussi l'un de l'autre. On remarquera que par cet emboítement, on évite un choc entre la buse 13 et le bloc semi-mobile de sorte que les contacts de commutation se rapprochent l'un de l'autre à la même vitesse que les contacts d'arc 8 et 11 ou que les contacts permanents 9 et 12. Simultanément, le déplacement du bloc semi-mobile par rapport au piston fixe 18 entraíne une augmentation du volume de la chambre 19 et une déformation (ici en compression) du ressort 20. La chambre 19 se remplit de gaz qui passe par les ouvertures 21. A un certain moment comme illustré sur la figure 3, les contacts d'arc 8 et 11 sont connectés mutuellement alors que les contacts de commutation 15 et 16 sont juste assez proches l'un de l'autre pour qu'un arc électrique 22 puisse se créer entre eux sans qu'un arc électrique puisse se créer entre les contacts permanents 9 et 12. En effet, ces derniers sont à ce moment éloignés l'un de l'autre d'une distance plus grande que celle séparant les contacts de commutation. A ce moment, la résistance de fermeture 4 est court-circuitée puisque le courant passe entre les contacts d'arcs 11 et 8, dans la tige 7, dans les contacts coulissants 17, dans le bloc semi-mobile 14, dans le contact de commutation 15, dans le contact de commutation 16 et dans le tube 9A. On comprend donc que la durée d'insertion de la résistance 4 est réduite à la durée entre l'instant où se crée l'arc 21 entre les contacts d'arc et l'instant où se crée l'arc 22 entre les contacts de commutation. Par ailleurs, on voit qu'après l'insertion de la résistance, on ne commute pas directement le courant sur les contacts permanents.Figure 3, the movable arcing and permanent contacts 11 and 12 continue to move closer to the fixed arcing and permanent contacts 8 and 9. The end of the nozzle 13 secured to the mobile assembly then fits on the end conical of the semi-movable block and pushes the latter along axis 3 so that the switching contacts 15 and 16 also approach each other. We note that by this nesting, it avoids a shock between the nozzle 13 and the semi-movable block so that the switching contacts approach one each other at the same speed as the arcing contacts 8 and 11 or as the contacts permanent 9 and 12. Simultaneously, the displacement of the semi-mobile unit by compared to the fixed piston 18 causes an increase in the volume of the chamber 19 and a deformation (here in compression) of the spring 20. The chamber 19 is filled gas passing through the openings 21. At a certain time as illustrated on In FIG. 3, the arcing contacts 8 and 11 are connected to each other while the switching contacts 15 and 16 are just close enough to each other to that an electric arc 22 can be created between them without an electric arc can be created between permanent contacts 9 and 12. Indeed, the latter are at this time distant from each other by a greater distance than that separating the switching contacts. At this time, the closing resistance 4 is short-circuited since the current flows between the arcing contacts 11 and 8, in the rod 7, in the sliding contacts 17, in the semi-mobile block 14, in switching contact 15, in switching contact 16 and in the tube 9A. It is therefore understood that the duration of insertion of the resistor 4 is reduced to the time between the moment when the arc 21 is created between the arcing contacts and the instant when the arc 22 is created between the switching contacts. We also see that after the insertion of the resistance, we do not directly switch the current on permanent contacts.

Figure 4, la buse 13 continue à pousser le bloc semi-mobile 14 et avant d'arriver à la fin de la course des contacts mobiles 11 et 12, on obtient une connexion mutuelle des contacts de commutation 15 et 16 avant celle des contacts permanents 9 et 12. Le courant passe ensuite par les contacts permanents de sorte que le disjoncteur se trouve dans une position de fermeture complète. Le volume de la chambre de compression 19 est maintenant maximal et le ressort 20 est complètement comprimé.Figure 4, the nozzle 13 continues to push the semi-movable block 14 and before to reach the end of the travel of the movable contacts 11 and 12, we obtain a mutual connection of the switching contacts 15 and 16 before that of the permanent contacts 9 and 12. Current then flows through the contacts permanent so that the circuit breaker is in a closed position complete. The volume of the compression chamber 19 is now maximum and the spring 20 is fully compressed.

Lors d'une opération d'ouverture, les contacts mobiles 11 et 12 se déplacent de la gauche vers la droite sur les figures. Les contacts permanents 9 et 12 se séparent d'abord l'un de l'autre, puis ensuite les contacts d'arc 8 et 11 mais les contacts de commutation 15 et 16 restent toujours connectés pendant un certain temps l'un à l'autre comme visible sur les figures 5 et 6 car le bloc semi-mobile se déplace plus lentement que les contacts mobiles. En fait, le bloc semi-mobile se déplace de la gauche vers la droite sur les figures par l'action du ressort 20 qui exerce une force de rappel en se détendant contre le piston 18. Toutefois, la détente du ressort 20 est retardée et ralentie par le fait qu'une force contraire de résistance s'oppose à la force de rappel exercée par le ressort, cette force contraire résultant de la nécessaire compression de gaz dans la chambre 19 dont le volume diminue à mesure que le bloc semi-mobile se déplace car les ouvertures d'échappement du gaz de cette chambre sont calibrées de façon adéquate. Ce calibrage est tel que les contacts de commutation 15 et 16 se séparent seulement l'un de l'autre après une séparation complète des contacts d'arc. De la sorte, le courant de court-circuit ne peut pas passer dans la résistance de fermeture 4 lors de l'ouverture du disjoncteur. C'est seulement quand l'arc électrique qui se crée entre les contacts d'arc est éteint par soufflage notamment que le bloc semi-mobile 14 finit sa course pour séparer les contacts de commutation 15 et 16 et retrouver sa position initiale illustrée sur la figure 1.During an opening operation, the movable contacts 11 and 12 are move from left to right in the figures. Permanent contacts 9 and 12 separate first from each other, then then the arcing contacts 8 and 11 but the switching contacts 15 and 16 always remain connected for some time to each other as shown in Figures 5 and 6 because the block semi-mobile moves more slowly than mobile contacts. In fact, the block semi-mobile moves from left to right in the figures by the action of the spring 20 which exerts a restoring force by relaxing against the piston 18. However, the relaxation of the spring 20 is delayed and slowed down by the fact that a force opposite of resistance opposes the restoring force exerted by the spring, this contrary force resulting from the necessary compression of gas in the chamber 19 whose volume decreases as the semi-mobile block moves because the gas exhaust openings in this chamber are calibrated so adequate. This calibration is such that the switching contacts 15 and 16 are only separate from each other after complete separation of the contacts arc. In this way, the short-circuit current cannot pass through the closing resistor 4 when opening the circuit breaker. It's only when the electric arc created between the arcing contacts is blown out in particular that the semi-mobile block 14 finishes its race to separate the contacts 15 and 16 and return to its initial position illustrated in FIG. 1.

Claims (5)

  1. A circuit breaker comprising a first permanent contact (9) and a fixed first arcing contact (8) that are mounted inside an enclosure (1), a second permanent contact (12) and a second arcing contact (11) that are mounted to move inside the enclosure along a longitudinal direction (3) and designed to co-operate with the stationary first contacts, and a system (14) for inserting a closure resistance (4), the moving second contacts forming a portion of equipment carrying a blast nozzle (13), the system for inserting the closure resistance comprises a semi-moving block (14) which is disposed to be displaced, during a closure operation, by the blast nozzle along said longitudinal direction, the circuit breaker being characterized in that the first permanent contact is fixed and the semi-moving block carries a third arcing contact (15) designed to co-operate with a fixed fourth arcing contact (16) connected to the first permanent contact, displacement of said semi-moving block moving the third and fourth arcing contacts (15, 16) towards each other to short circuit said closure resistance while said first and second arcing contacts (8, 11) are in contact with each other and while the permanent contacts (9, 12) are separate from each other, said permanent contacts being in contact with each other only after the third and fourth arcing contacts have themselves come into contact with each other.
  2. A circuit breaker according to claim 1, in which said semi-moving block (14) has a conically-shaped end which engages in the thimble-shaped blast nozzle (13) during the operation of closing the circuit breaker.
  3. A circuit breaker according to claim 1, in which the semi-moving block is tubular in shape and includes a spring (20) which is deformed on closure of the circuit breaker, and a chamber (19) which fills with gas during said closure operation such that during opening of the circuit breaker, said spring exerts a return force tending to move the semi-moving block in the displacement direction of the first moving contacts, with displacement of the semi-moving block being retarded and slowed down relative to that of the first moving contacts because of the gas inside the chamber (19) being compressed.
  4. A circuit breaker according to claim 3, in which the chamber has calibrated openings (21) so that, during opening of the circuit breaker, a force resists the return force of the spring.
  5. A circuit breaker according to any one of claims 1 to 4, in which said closure resistance (4), said semi-moving block (14), and said contacts (8, 9, 11, 12, 15, 16) are disposed in axial alignment inside the enclosure (1).
EP98401355A 1997-06-12 1998-06-08 Circuit breaker with closing resistor Expired - Lifetime EP0884745B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9707284 1997-06-12
FR9707284A FR2764728B1 (en) 1997-06-12 1997-06-12 CLOSING RESISTANCE CIRCUIT BREAKER

Publications (2)

Publication Number Publication Date
EP0884745A1 EP0884745A1 (en) 1998-12-16
EP0884745B1 true EP0884745B1 (en) 2004-03-17

Family

ID=9507893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98401355A Expired - Lifetime EP0884745B1 (en) 1997-06-12 1998-06-08 Circuit breaker with closing resistor

Country Status (9)

Country Link
US (1) US5955715A (en)
EP (1) EP0884745B1 (en)
CN (1) CN1089939C (en)
AT (1) ATE262216T1 (en)
BR (1) BR9802002A (en)
CA (1) CA2239239C (en)
DE (1) DE69822369T2 (en)
FR (1) FR2764728B1 (en)
RU (1) RU2157016C2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2887070B1 (en) * 2005-06-10 2008-11-07 Areva T & D Ag ELECTRIC SWITCH COMPRISING AN ANNULAR FIXED CONTACT
DE502007004867D1 (en) * 2007-09-10 2010-10-07 Abb Technology Ag On resistance for high voltage circuit breaker
FR2922354B1 (en) * 2007-10-15 2009-12-11 Areva T & D Sa CIRCUIT BREAKER HAS TWO ALIGNED CUTTING ROOMS, COMMON TRANSMISSION AND REDUCED SIZE
CN101409176B (en) * 2008-12-04 2011-12-07 天水长城开关厂有限公司 Major loop structure for vacuum circuit-breaker
US9305726B2 (en) * 2014-08-27 2016-04-05 Eaton Corporation Arc extinguishing contact assembly for a circuit breaker assembly
CN109872885A (en) * 2017-12-04 2019-06-11 江苏大全封闭母线有限公司 A kind of dynamic/static contact plug position-limit mechanism

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3411445A1 (en) * 1984-02-06 1985-08-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau HIGH VOLTAGE SWITCH
FR2596575B1 (en) * 1986-03-26 1988-05-20 Alsthom DIELECTRIC GAS CIRCUIT BREAKER UNDER PRESSURE
FR2629260B1 (en) * 1988-03-23 1994-07-08 Alsthom HIGH-VOLTAGE LOW-ENERGY CIRCUIT BREAKER

Also Published As

Publication number Publication date
FR2764728A1 (en) 1998-12-18
US5955715A (en) 1999-09-21
RU2157016C2 (en) 2000-09-27
BR9802002A (en) 1999-10-19
DE69822369T2 (en) 2005-03-17
CA2239239C (en) 2004-01-13
CN1089939C (en) 2002-08-28
DE69822369D1 (en) 2004-04-22
FR2764728B1 (en) 1999-09-24
ATE262216T1 (en) 2004-04-15
CA2239239A1 (en) 1998-12-12
EP0884745A1 (en) 1998-12-16
CN1202716A (en) 1998-12-23

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