EP0461629B1 - Circuit breaker incorporating a varistor - Google Patents
Circuit breaker incorporating a varistor Download PDFInfo
- Publication number
- EP0461629B1 EP0461629B1 EP91109609A EP91109609A EP0461629B1 EP 0461629 B1 EP0461629 B1 EP 0461629B1 EP 91109609 A EP91109609 A EP 91109609A EP 91109609 A EP91109609 A EP 91109609A EP 0461629 B1 EP0461629 B1 EP 0461629B1
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- EP
- European Patent Office
- Prior art keywords
- circuit breaker
- varistor
- electrode
- moving equipment
- chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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
- H01H33/161—Variable impedances
Definitions
- the present invention relates to a high-voltage circuit breaker equipped with varistors to limit overvoltages at cut-off.
- Patent application FR-A-2506067 describes a circuit breaker according to the preamble of claim 1.
- An object of the present invention is to provide a circuit breaker provided with a varistor insertion device during the opening phase of the circuit breaker, which is simple, reliable and inexpensive and which, in particular, does not include a delay system, no complex moving part, no insertion electrode placed on the arc path.
- the arrangements according to the invention make it possible to implement the invention by a minimal modification of the existing circuit breakers, even if the distance between the contacts, in the open position of the circuit breaker, is small.
- circuit breaker as defined by claim 1.
- the reference 1 designates a cylindrical insulating envelope, preferably made of porcelain, delimiting an interior volume 2, constituting the breaking chamber of the circuit breaker, filled with a gas with high dielectric strength, such as sulfur hexafluoride , under a pressure of a few bars.
- a gas with high dielectric strength such as sulfur hexafluoride
- the circuit breaker comprises a fixed main contact formed by a tube 3 connected mechanically and electrically by arms 4 to a first socket 5 of the circuit breaker.
- the contact 3 is integral with a fixed arcing contact 6, also consisting of a tubular part; this contact 6 is electrically connected to contact 3.
- the circuit breaker moving element includes a contact main mobile formed by contact fingers 9, protected by a corona hood 10 and cooperating with the tube 3. It also comprises an arcing contact formed by fingers 11, cooperating with the tube 6, and a blowing nozzle 12.
- the corona hood 10 is fixed to or forms an integral part of a metallic cylindrical part 10A fixed to an operating rod not shown and in electrical connection by contacts suitable for a second socket not shown.
- the circuit breaker is supplemented by blowing means comprising in particular a fixed blowing piston 13.
- the blowing means which are not part of the invention, have not been shown in more detail. They are made in a manner well known to those skilled in the art.
- the circuit breaker comprises a varistor 20 placed inside the breaking chamber; this varistor is preferably formed by a stack of pellets with metal oxides based on zinc oxide (ZnO).
- the pellets form a cylindrical column coaxial with the envelope 1.
- Resistive pads 20A symbolically represented in the drawing with a thickness different from that of the pads 20, can be placed in series with the latter and extend the aforementioned stacking. Their role, as we will see later, is to limit the power in the varistor elements.
- the stack is pressed, at the upper part of the chamber, by a spring 21 which also bears against a metal cover 22 closing the chamber and electrically connected to the socket 5.
- a metal braid 19 provides electrical continuity between resistance-varistor stack and cover 22.
- the pellets are held by an insulating tube 23 closed at its lower part by a metal end piece 24, in electrical contact with the last tablet of the stack.
- Electrode 100 comprising a metal ring 101, for example made of copper, having a contact finger 102.
- the ring 101 is held by two arms 103 fixed to the end piece 24.
- the contact finger 102 rubs on a metallic tubular electrode 105 secured to the movable assembly and electrically connected to the movable contacts.
- the distance d1 separating the ring 102 and the electrode 105 when the circuit breaker is in the open position, is approximately equal to half of the distance d2 then separating the arcing contacts 6 and 11.
- the arc duration mentioned above corresponds to a varistor insertion time of the order of 15 ms. This duration is sufficient to ensure the effective limitation of overvoltages, in particular during the deactivation of line reactors, the cut-off of idle lines and the cut-off. on three-phase fault with regard to the first pole of the circuit breaker which cuts.
- the low voltage applied to the varistor when the circuit breaker is in the open position prevents the varistor from any risk of thermal runaway, partial discharges, etc., as did the series switch of the prior art described above.
- the varistor When closing the circuit breaker, the varistor is first inserted into the circuit by contacting parts 101 and 105; the rear contact of the arcing contacts 6 and 11 then short-circuits the varistor.
- the energy of the varistor is determined for a closing-opening cycle in phase opposition.
- the varistor can be placed within the dielectric gas, since the tube 23 is not sealed.
- the varistor is separated from the gas in the switching chamber by an insulating cone 110, sealed.
- the varistor is then placed in dry air at atmospheric pressure.
- This arrangement has the advantage of allowing the varistor to be replaced without emptying the cutting chamber of the sulfur hexafluoride under pressure that it contains.
- Figures 2 to 4 illustrate the insertion mechanism according to the invention usable in particular when the circuit breaker has a relatively small distance d2.
- the tubular electrode 105 described above is now replaced by a tubular electrode 205, sliding with gentle friction around the tubes 10 and 10A; the tube 205 carries at a first end a protrusion 205A for electrical contact with the ring 102, and at its second end a bead 205B, serving to support a first end of a spring 203.
- the spring is contained by a metallic tubular piece 204 fixed at one end to the tube 10 and carrying, at its other end, a bead 206. The second end of the spring 203 bears against the bead 206.
- the piece 204 is in electrical contact with the bead 205B of the room 205; the part 204 carries, towards its end on the bead side, holes 204A whose role will appear later.
- the tube 10 also carries holes 10B in the vicinity of the foot for fixing the tubular part 204.
- the tube 10 moves down the figure; the gas in the blowing volume V1 is compressed and exerts, by the holes 10B, pressure on the bead 205A, so that the electrode 205 moves in the opposite direction, against the action of the spring 203 which is compressed.
- the displacement of the electrode 205 is also helped by the acceleration at the opening of the movable contact.
- the holes 204A are used for evacuating the gas from the volume between the tubes 204 and 205, which makes it possible not to increase the operating energy too much.
- the electrode 205 On closing, the electrode 205 is pressed against the bead 206 due to the acceleration of the movable contact and the depression of the volume V1.
- the electrode 205 in the form of a metal rod sliding inside a small diameter tube attached to the tube 10. This arrangement makes it possible to have a small volume of compressed gas. under electrode 205.
- the invention applies to high voltage circuit breakers, conventional and shielded.
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- Circuit Breakers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Thermistors And Varistors (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Cookers (AREA)
- Organic Insulating Materials (AREA)
- Discharge Lamp (AREA)
Abstract
Description
La présente invention est relative à un disjoncteur à haute tension équipé de varistances pour limiter les surtensions à la coupure.The present invention relates to a high-voltage circuit breaker equipped with varistors to limit overvoltages at cut-off.
On sait que plus le seuil de fonctionnement de la varistance est faible, plus la protection contre la surtension est efficace. Pour obtenir un seuil de fonctionnement de varistance faible, il faut associer en série un nombre faible d'éléments de varistance; l'inconvénient est que l'énergie absorbée par chaque élément de varistance est alors élevée.It is known that the lower the operating threshold of the varistor, the more effective the overvoltage protection. To obtain a low varistor operating threshold, a small number of varistor elements must be associated in series; the drawback is that the energy absorbed by each varistor element is then high.
La valeur limite de la surtension dont on peut se protéger par varistance est actuellement de 1,6 p.u. (1 p.u. = √2/√3 Un en valeur crête, Un étant la tension nominale de phase).The limit value of the overvoltage which can be protected by varistor is currently 1.6 p.u. (1 p.u. = √2 / √3 Un at peak value, Un being the nominal phase voltage).
Pour limiter la surtension au-dessous de 1,6 p.u., tout en conservant une dissipation d'énergie acceptable dans la varistance, on a proposé, notamment dans la demande de brevet français n° 2 658 949, d'insérer la varistance au moyen d'un système retardateur et d'un flexible.To limit the overvoltage below 1.6 pu, while retaining an acceptable energy dissipation in the varistor, it has been proposed, in particular in French patent application No. 2,658,949, to insert the varistor by means a delay system and a hose.
Dans la demande de brevet français n° 2 654 251, on a proposé d'utiliser un système à ressort de compression et de traction.In French patent application No. 2,654,251, it has been proposed to use a compression and traction spring system.
Ces systèmes donnent satisfaction, mais sont relativement complexes et onéreux.These systems are satisfactory, but are relatively complex and expensive.
La demande de brevet FR-A-2506067 décrit un disjoncteur selon le préambule de la revendication 1.Patent application FR-A-2506067 describes a circuit breaker according to the preamble of claim 1.
Un but de la présente invention est de réaliser un disjoncteur muni d'un dispositif d'insertion de varistance pendant la phase d'ouverture du disjoncteur, qui soit simple, fiable et peu onéreux et qui, en particulier, ne comporte ni système retardateur, ni pièce mobile complexe, ni électrode d'insertion placée sur le chemin de l'arc.An object of the present invention is to provide a circuit breaker provided with a varistor insertion device during the opening phase of the circuit breaker, which is simple, reliable and inexpensive and which, in particular, does not include a delay system, no complex moving part, no insertion electrode placed on the arc path.
De plus, les dispositions conformes à l'invention permettent de mettre en oeuvre l'invention par une modification minime des disjoncteurs existants, même si la distance entre les contacts, en position ouverte du disjoncteur, est faible.In addition, the arrangements according to the invention make it possible to implement the invention by a minimal modification of the existing circuit breakers, even if the distance between the contacts, in the open position of the circuit breaker, is small.
Ces buts sont atteints selon l'invention par le disjoncteur tel que défini par la revendication 1.These objects are achieved according to the invention by the circuit breaker as defined by claim 1.
L'invention est maintenant expliquée en détail en référence au dessin annexé dans lequel:
- la figure 1 est une vue partielle en coupe axiale d'un disjoncteur dans laquelle la varistance est séparée du gaz diélectrique, le mécanisme d'insertion de la varistance étant schématisé et illustrant l'art antérieur, utile à la compréhension de l'invention.
- la figure 2 est une vue partielle en coupe axiale d'un disjoncteur conforme à l'invention, représenté en position enclenchée,
- la figure 3 est une vue partielle du même disjoncteur, représenté en cours d'ouverture,
- la figure 4 est une vue partielle du même disjoncteur, en position déclenchée.
- Figure 1 is a partial view in axial section of a circuit breaker in which the varistor is separated from the dielectric gas, the varistor insertion mechanism being shown schematically and illustrating the prior art, useful for understanding the invention.
- FIG. 2 is a partial view in axial section of a circuit breaker according to the invention, shown in the latched position,
- FIG. 3 is a partial view of the same circuit breaker, shown during opening,
- Figure 4 is a partial view of the same circuit breaker, in the tripped position.
Dans la figure 1, la référence 1 désigne une enveloppe isolante cylindrique, de préférence en porcelaine, délimitant un volume intérieur 2, constituant la chambre de coupure du disjoncteur, rempli d'un gaz à rigidité diélectrique élevée, tel que l'hexafluorure de soufre, sous une pression de quelques bars.In FIG. 1, the reference 1 designates a cylindrical insulating envelope, preferably made of porcelain, delimiting an
Le disjoncteur comprend un contact principal fixe formé d'un tube 3 relié mécaniquement et électriquement par des bras 4 à une première prise de courant 5 du disjoncteur. Le contact 3 est solidaire d'un contact d'arc fixe 6, constitué également d'une pièce tubulaire; ce contact 6 est électriquement relié au contact 3.The circuit breaker comprises a fixed main contact formed by a tube 3 connected mechanically and electrically by arms 4 to a
L'équipage mobile du disjoncteur comprend un contact principal mobile formé de doigts de contact 9, protégés par un capot pare-effluves 10 et coopérant avec le tube 3. Il comprend également un contact d'arc formé de doigts 11, coopérant avec le tube 6, et une buse de soufflage 12. Le capot pare-effluves 10 est fixé à ou fait partie intégrante d'une pièce cylindrique métallique 10A fixée à une tringle de manoeuvre non représentée et en liaison électrique par des contacts appropriés à une seconde prise de courant non représentée. Le disjoncteur est complété par des moyens de soufflage comprenant notamment un piston de soufflage fixe 13. Les moyens de soufflage, qui ne font pas partie de l'invention, n'ont pas été représentés plus en détail. Ils sont réalisés de manière bien connue de l'homme du métier.The circuit breaker moving element includes a contact main mobile formed by contact fingers 9, protected by a
Le disjoncteur comprend une varistance 20 placée à l'intérieur de la chambre de coupure; cette varistance est formée de préférence par un empilage de pastilles à oxydes métalliques à base d'oxyde de zinc (ZnO). Les pastilles forment une colonne cylindrique coaxiale à l'enveloppe 1. Des pastilles résistives 20A, représentées symboliquement dans le dessin avec une épaisseur différente de celle des pastilles 20, peuvent être placées en série avec ces dernières et prolongent l'empilage précité. Leur rôle, comme on le verra plus loin, est de limiter la puissance dans les éléments de varistances.The circuit breaker comprises a varistor 20 placed inside the breaking chamber; this varistor is preferably formed by a stack of pellets with metal oxides based on zinc oxide (ZnO). The pellets form a cylindrical column coaxial with the envelope 1.
L'empilage est pressé, à la partie supérieure de la chambre, par un ressort 21 s'appuyant par ailleurs contre un capot métallique 22 fermant la chambre et électriquement relié à la prise de courant 5. Une tresse métallique 19 assure la continuité électrique entre l'empilage résistance-varistance et le capot 22.The stack is pressed, at the upper part of the chamber, by a
Les pastilles sont maintenues par un tube isolant 23 fermé à sa partie inférieure par une pièce d'extrémité métallique 24, en contact électrique avec la dernière pastille de l'empilage.The pellets are held by an
Le mécanisme d'insertion de la varistance (et de la résistance lorsque celle-ci est présente) est décrit maintenant.The mechanism of insertion of the varistor (and of the resistance when the latter is present) is now described.
Il comprend une électrode 100 comprenant un anneau métallique 101, en cuivre par exemple, ayant un doigt de contact 102. L'anneau 101 est maintenu par deux bras 103 fixés à la pièce d'extrémité 24. Le doigt de contact 102 frotte sur une électrode tubulaire métallique 105 solidaire de l'équipage mobile et électriquement reliée aux contacts mobiles.It comprises an
La distance d1 séparant l'anneau 102 et l'électrode 105 lorsque le disjoncteur est en position ouverte, est à peu près égale à la moitié de la distance d2 séparant alors les contacts d'arc 6 et 11.The distance d1 separating the
Le fonctionnement du disjoncteur est expliqué maintenant, après avoir rappelé que sous la tension permanente (1 p.u.), la varistance se comporte comme une capacité. Dans les applications en haute tension qui nécessitent un nombre assez important de pastilles de varistance en série, la capacité de la varistance en régime permanent est de l'ordre d'une trentaine de picofarads. Le courant capacitif est donc extrêmement faible.The operation of the circuit breaker is explained now, after having recalled that under permanent voltage (1 p.u.), the varistor behaves like a capacitor. In high voltage applications which require a fairly large number of varistor pads in series, the capacity of the varistor in steady state is of the order of thirty picofarads. The capacitive current is therefore extremely low.
A l'ouverture du disjoncteur, après la séparation des contacts principaux, un arc électrique s'établit entre les contacts d'arc 6 et 11. On suppose que l'arc s'éteint avant l'arrivée en fin de course de l'équipage mobile, c'est-à-dire pour une durée d'arc moyenne de 12 millisecondes (à 60 Hz) ou 15 ms (à 50 Hz). Pendant cette durée, il y a contact entre les pièces 101 et 105, soit directement, soit par l'intermédiaire d'un arc de courte longueur lorsque les pièces 101 et 105 se sont séparées. Ce contact a pour effet d'insérer la varistance dans le circuit à couper; si une surtension suffisante intervient, la varistance fonctionnera, en insérant sa valeur ohmique dans le circuit, limitant ainsi la surtension.At the opening of the circuit breaker, after the separation of the main contacts, an electric arc is established between the arcing contacts 6 and 11. It is supposed that the arc is extinguished before the end of travel of the moving equipment, i.e. for an average arc duration of 12 milliseconds (at 60 Hz) or 15 ms (at 50 Hz). During this period, there is contact between the
On notera qu'à la durée d'arc mentionnée plus haut correspond une durée d'insertion de la varistance de l'ordre de 15 ms. Cette durée est suffisante pour assurer la limitation effective des surtensions en particulier lors de la désinsertion des réactances de ligne, de la coupure des lignes à vide et de la coupure sur défaut triphasé pour ce qui concerne le premier pôle du disjoncteur qui coupe.Note that the arc duration mentioned above corresponds to a varistor insertion time of the order of 15 ms. This duration is sufficient to ensure the effective limitation of overvoltages, in particular during the deactivation of line reactors, the cut-off of idle lines and the cut-off. on three-phase fault with regard to the first pole of the circuit breaker which cuts.
En fin de course de l'équipage mobile, il n'y a plus aucun contact entre les pièces 101 et 105, la coupure de l'arc étant définitive.At the end of the movement of the moving assembly, there is no longer any contact between the
A cet instant, une grande partie de la tension rétablie est appliquée à l'espace interélectrode d1, entre 80 et 85%, selon la capacité de la varistance et celle existant entre les pièces 101 et 105; ces deux capacités sont en série.At this instant, a large part of the restored voltage is applied to the interelectrode space d1, between 80 and 85%, depending on the capacity of the varistor and that existing between
En position ouverte, seulement une faible partie de la tension sera appliquée à la varistance. La totalité de la tension est appliquée par contre à l'espace interélectrodes d1.In the open position, only a small part of the voltage will be applied to the varistor. However, all of the voltage is applied to the inter-electrode space d1.
La faible tension appliquée à la varistance lorsque le disjoncteur est en position ouverte évite à la varistance tout risque d'emballement thermique, de décharges partielles, etc.. , comme le faisait l'interrupteur série de l'art antérieur décrit plus haut.The low voltage applied to the varistor when the circuit breaker is in the open position prevents the varistor from any risk of thermal runaway, partial discharges, etc., as did the series switch of the prior art described above.
Lors de la fermeture du disjoncteur, on insère d'abord la varistance dans le circuit par le contact des pièces 101 et 105; le contact postérieur des contacts d'arc 6 et 11 court-circuite alors la varistance.When closing the circuit breaker, the varistor is first inserted into the circuit by contacting
Sous tension simple, il n'y aura pas de fonctionnement de la varistance.Under simple tension, there will be no functioning of the varistor.
En opposition de phase à 2 p.u. par exemple, il y aura fonctionnement de la varistance à la fermeture.In phase opposition at 2 p.u. for example, there will be functioning of the varistor at closing.
Pour réduire l'énergie dans la varistance, on peut prévoir, comme déjà mentionné plus haut, d'associer à la varistance une résistance de faible valeur ohmique montée en série.To reduce the energy in the varistor, provision may be made, as already mentioned above, for combining with the varistor a resistor of low ohmic value connected in series.
L'énergie de la varistance est déterminée pour un cycle de fermeture-ouverture en opposition de phases.The energy of the varistor is determined for a closing-opening cycle in phase opposition.
La varistance peut être placée au sein du gaz diélectrique, car le tube 23 n'est pas étanche.The varistor can be placed within the dielectric gas, since the
Dans le mode de réalisation de la figure 1, la varistance est séparée du gaz de la chambre de coupure par un cône isolant 110, étanche. La varistance est alors placée dans de l'air sec à la pression atmosphérique.In the embodiment of Figure 1, the varistor is separated from the gas in the switching chamber by an
Cette disposition présente l'avantage de permettre le remplacement de la varistance sans vider la chambre de coupure de l'hexafluorure de soufre sous pression qu'elle contient.This arrangement has the advantage of allowing the varistor to be replaced without emptying the cutting chamber of the sulfur hexafluoride under pressure that it contains.
Les figures 2 à 4 illustrent le mécanisme d'insertion conforme à l'invention utilisable notamment lorsque le disjoncteur a une distance d2 relativement faible.Figures 2 to 4 illustrate the insertion mechanism according to the invention usable in particular when the circuit breaker has a relatively small distance d2.
L'électrode tubulaire 105 décrite précédemment est maintenant remplacée par une électrode tubulaire 205, coulissant à frottement doux autour des tubes 10 et 10A; le tube 205 porte à une première extrémité une protubérance 205A pour le contact électrique avec l'anneau 102, et à sa deuxième extrémité un bourrelet 205B, servant d'appui à une première extrémité d'un ressort 203. Le ressort est contenu par une pièce tubulaire métallique 204 fixée par une extrémité au tube 10 et portant, à son autre extrémité, un bourrelet 206. La seconde extrémité du ressort 203 s'appuie contre le bourrelet 206. La pièce 204 est en contact électrique avec le bourrelet 205B de la pièce 205; la pièce 204 porte, vers son extrémité côté bourrelet, des trous 204A dont le rôle apparaîtra plus loin. Le tube 10 porte également des trous 10B au voisinage du pied de fixation de la pièce tubulaire 204.The
Lorsque le disjoncteur est en position enclenchée, (figure 2), le ressort 203 est détendu et l'électrode 205 est en position basse. L'électrode 102 est en contact avec le tube 204, le piston de soufflage 13 est en position basse.When the circuit breaker is in the engaged position (FIG. 2), the
A l'ouverture du disjoncteur, (figure 3), le tube 10 se déplace vers le bas de la figure; le gaz dans le volume de soufflage V1 est comprimé et exerce, par les trous 10B, une pression sur le bourrelet 205A, de sorte que l'électrode 205 se déplace en sens inverse, contre l'action du ressort 203 qui est comprimé. Le déplacement de l'électrode 205 est aidé aussi par l'accélération à l'ouverture du contact mobile. Les trous 204A servent à l'évacuation du gaz du volume compris entre les tubes 204 et 205, ce qui permet de ne pas trop augmenter l'énergie de manoeuvre. Grâce à ce mouvement de l'électrode 205, en sens inverse du mouvement de l'équipage mobile, la varistance est insérée pendant une durée suffisante, l'électrode 102 étant d'abord en contact électrique avec le tube 204, puis avec la protubérance 205A.At the opening of the circuit breaker, (Figure 3), the
Après l'ouverture complète du disjoncteur, (figure 4), le piston 13 a dépassé les trous 10B; la surpression sur le bourrelet 205B disparaît, le ressort 203 se détend, ramenant l'électrode 205 à sa position initiale et permettant ainsi de garder une distance d'isolement suffisante.After the complete opening of the circuit breaker, (Figure 4), the
A la fermeture, l'électrode 205 est plaquée contre le bourrelet 206 à cause de l'accélération du contact mobile et de la dépression du volume V1.On closing, the
Dans certains cas, il est avantageux de réaliser l'électrode 205 sous la forme d'une tige métallique coulissant à l'intérieur d'un tube de faible diamètre accolé au tube 10. Cette disposition permet d'avoir un volume de gaz comprimé faible sous l'électrode 205.In some cases, it is advantageous to produce the
L'invention s'applique aux disjoncteurs à haute tension, conventionnels et blindés.The invention applies to high voltage circuit breakers, conventional and shielded.
Claims (6)
- A high tension circuit breaker insulated by gas having good dielectric properties, the circuit breaker comprising at least one interrupting chamber per phase, each chamber (2) comprising a fixed main contact (3) connected to a first current terminal (5) and a moving main contact (9) in electrical connection with a second current terminal and constituting a portion of moving equipment connected to a drive mechanism, each chamber further including a varistor (20) disposed in line with its main contacts and inserted during closing of the circuit breaker and at the start of opening thereof by means of two electrodes disposed outside and around the main contacts (3, 9), a first electrode (100) being electrically and mechanically connected to said varistor (20), the second electrode (205) being mechanically connected to the moving equipment and being in an electrical connection with the main moving contact (9), the circuit breaker being characterized in that the second electrode (205) is capable of performing translation movement of limited amplitude relative to the moving equipment and is displaceable during circuit breaker opening in the opposite direction to the moving equipment, then being returned to its initial position at the end of the circuit breaker opening operation.
- A circuit breaker according to claim 1, characterized in that the second electrode (205) is displaced relative to the moving equipment in the opposite direction to the moving equipment by the pressure of the gas compressed in a blast chamber (V1) during circuit breaker opening, with said second electrode being returned to its initial position at the end of the circuit breaker opening operation by means of a spring (203).
- A circuit breaker according to claim 1 or 2, characterized in that when the circuit breaker is in the disengaged position, the varistor (20) withstands a voltage that does not exceed 30% of the voltage applied to the interrupting chamber.
- A circuit breaker according to any one of claims 1 to 3, characterized in that the varistor (20) is enclosed in a case filled with gas having good dielectric properties and under pressure.
- A circuit breaker according to any one of claims 1 to 3, characterized in that the varistor (20) is enclosed in a case filled with dry air under atmospheric pressure.
- A circuit breaker according to any one of claims 1 to 5, characterized in that the varistor (20) is in series with a resistor (20A) having low resistance.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9007425 | 1990-06-14 | ||
| FR9007425A FR2663456B1 (en) | 1990-06-14 | 1990-06-14 | CIRCUIT BREAKER WITH INCORPORATED VARISTANCE. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0461629A1 EP0461629A1 (en) | 1991-12-18 |
| EP0461629B1 true EP0461629B1 (en) | 1995-05-17 |
Family
ID=9397604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91109609A Expired - Lifetime EP0461629B1 (en) | 1990-06-14 | 1991-06-12 | Circuit breaker incorporating a varistor |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US5164559A (en) |
| EP (1) | EP0461629B1 (en) |
| JP (1) | JPH0779012B2 (en) |
| CN (1) | CN1025390C (en) |
| AT (1) | ATE122817T1 (en) |
| BR (1) | BR9102443A (en) |
| CA (1) | CA2044517C (en) |
| DE (1) | DE69109749T2 (en) |
| ES (1) | ES2073068T3 (en) |
| FR (1) | FR2663456B1 (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2674984B1 (en) * | 1991-04-05 | 1993-06-11 | Alsthom Gec | SF6 CIRCUIT BREAKER WITH INCORPORATED CAPACITOR. |
| FR2676587B1 (en) * | 1991-05-17 | 1994-06-10 | Alsthom Gec | CIRCUIT BREAKER WITH LARGE BREAKING POWER. |
| FR2676857B1 (en) * | 1991-05-22 | 1994-04-08 | Gec Alsthom Sa | DEVICE FOR INSERTING A VARISTOR, INCORPORATED IN A HIGH VOLTAGE CIRCUIT BREAKER. |
| FR2682219B1 (en) * | 1991-10-02 | 1997-01-31 | Alsthom Gec | ULTRA HIGH VOLTAGE CIRCUIT BREAKER. |
| FR2688624A1 (en) * | 1992-03-10 | 1993-09-17 | Alsthom Gec | INERTIA CONTACT FOR CIRCUIT BREAKER ALLOWING THE TEMPORARY INSERTION OF AN IMPEDANCE. |
| CN1040810C (en) * | 1993-07-06 | 1998-11-18 | 郑江 | Contact mechanism of arc-less high-voltage switch |
| FR2712118B1 (en) * | 1993-11-02 | 1995-12-29 | Gec Alsthom T & D Sa | Circuit breaker with device for inserting an electrical component. |
| FR2748597B1 (en) * | 1996-05-13 | 1998-06-12 | Gec Alsthom T & D Sa | HIGH VOLTAGE CIRCUIT BREAKER WITH CLOSING RESISTANCE INSERTION |
| US6316742B1 (en) | 1999-07-14 | 2001-11-13 | Southern States, Inc. | Limited restrike circuit interrupter used as a line capacitor and load switch |
| US6236010B1 (en) | 1999-07-14 | 2001-05-22 | Southern States, Inc. | Circuit interrupter including a penetrating electrical contact with grip and release structure |
| EP2169794A1 (en) * | 2008-09-26 | 2010-03-31 | Eaton Electric B.V. | Switching installation with arc protection and arc protection method |
| JP5178644B2 (en) * | 2009-06-29 | 2013-04-10 | 株式会社東芝 | Gas circuit breaker with input resistance contact and its input / output method |
| CN101825894B (en) * | 2010-04-30 | 2012-07-18 | 北京航空航天大学 | SF6 high-voltage circuit breaker state intelligent monitoring and health management system |
| KR101415065B1 (en) * | 2010-11-17 | 2014-07-04 | 엘에스산전 주식회사 | Contact apparatus for circuit breaker |
| CN105723489B (en) * | 2013-08-05 | 2019-06-04 | 英诺锂资产公司 | With the reversing switch for blocking semiconductor |
| FR3022682B1 (en) * | 2014-06-20 | 2018-04-06 | Abb France | INDICATOR FOR DISCONNECTING AN ACTIVE COMPONENT FROM A DEVICE FOR PROTECTING AN ELECTRICAL INSTALLATION |
| CN106207649A (en) * | 2016-08-23 | 2016-12-07 | 周刚 | A kind of Arc-free electrical connection or power-off method |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3912974A (en) * | 1970-02-18 | 1975-10-14 | George Leslie Hill | Circuit breaker |
| JPS4830058A (en) * | 1971-08-24 | 1973-04-20 | ||
| US4204101A (en) * | 1977-06-22 | 1980-05-20 | Gould Inc. | Hybrid circuit breaker with varistor in parallel with vacuum interrupter |
| JPS5517929A (en) * | 1978-07-26 | 1980-02-07 | Hitachi Ltd | Buffer type gas breaker |
| FR2450501A1 (en) * | 1979-03-02 | 1980-09-26 | Alsthom Cgee | CLOSING RESISTANCE INSERTION DEVICE OF A SWITCHING APPARATUS |
| JPS55173034U (en) * | 1979-05-31 | 1980-12-11 | ||
| IT1144419B (en) * | 1980-07-23 | 1986-10-29 | Alsthom Atlantique | COMPRESSED GAS SWITCH |
| FR2506067A1 (en) * | 1981-05-15 | 1982-11-19 | Alsthom Atlantique | High voltage circuit breaker - where main switch has by=pass circuit contg. rows of resistors employed to quench arc when switch is opened |
| FR2512267A1 (en) * | 1981-08-26 | 1983-03-04 | Alsthom Atlantique | COMPRESSED GAS CIRCUIT BREAKER WITH OPENING AND CLOSING RESISTORS |
| JPS58121519A (en) * | 1982-01-12 | 1983-07-19 | 株式会社日立製作所 | Breaker with resistance contact |
| JPS58154536U (en) * | 1982-04-12 | 1983-10-15 | 株式会社日立製作所 | Disconnector with resistance contact |
| DE3411445A1 (en) * | 1984-02-06 | 1985-08-08 | BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau | HIGH VOLTAGE SWITCH |
| CH665053A5 (en) * | 1984-11-12 | 1988-04-15 | Bbc Brown Boveri & Cie | SWITCH ARRANGEMENT FOR SWITCHING OFF A REACTANCE. |
| JPS61225727A (en) * | 1985-03-29 | 1986-10-07 | 株式会社日立製作所 | Breaker |
| FR2612683B1 (en) * | 1987-03-18 | 1994-06-03 | Alsthom | HIGH VOLTAGE CIRCUIT BREAKER WITH CLOSING RESISTANCE |
-
1990
- 1990-06-14 FR FR9007425A patent/FR2663456B1/en not_active Expired - Fee Related
-
1991
- 1991-04-29 US US07/692,421 patent/US5164559A/en not_active Expired - Lifetime
- 1991-05-27 CN CN91103437A patent/CN1025390C/en not_active Expired - Fee Related
- 1991-06-12 DE DE69109749T patent/DE69109749T2/en not_active Expired - Fee Related
- 1991-06-12 EP EP91109609A patent/EP0461629B1/en not_active Expired - Lifetime
- 1991-06-12 AT AT91109609T patent/ATE122817T1/en not_active IP Right Cessation
- 1991-06-12 ES ES91109609T patent/ES2073068T3/en not_active Expired - Lifetime
- 1991-06-13 BR BR919102443A patent/BR9102443A/en not_active IP Right Cessation
- 1991-06-13 CA CA002044517A patent/CA2044517C/en not_active Expired - Lifetime
- 1991-06-14 JP JP3143386A patent/JPH0779012B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2073068T3 (en) | 1995-08-01 |
| DE69109749T2 (en) | 1995-09-21 |
| EP0461629A1 (en) | 1991-12-18 |
| BR9102443A (en) | 1992-01-14 |
| JPH0779012B2 (en) | 1995-08-23 |
| US5164559A (en) | 1992-11-17 |
| CA2044517C (en) | 1994-12-27 |
| FR2663456A1 (en) | 1991-12-20 |
| CN1057362A (en) | 1991-12-25 |
| CA2044517A1 (en) | 1991-12-15 |
| FR2663456B1 (en) | 1996-04-26 |
| JPH04229915A (en) | 1992-08-19 |
| ATE122817T1 (en) | 1995-06-15 |
| CN1025390C (en) | 1994-07-06 |
| DE69109749D1 (en) | 1995-06-22 |
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