EP0482555A1 - SF6 circuit breaker with built-in condensor - Google Patents

SF6 circuit breaker with built-in condensor Download PDF

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Publication number
EP0482555A1
EP0482555A1 EP91117923A EP91117923A EP0482555A1 EP 0482555 A1 EP0482555 A1 EP 0482555A1 EP 91117923 A EP91117923 A EP 91117923A EP 91117923 A EP91117923 A EP 91117923A EP 0482555 A1 EP0482555 A1 EP 0482555A1
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EP
European Patent Office
Prior art keywords
circuit breaker
capacitor
tube
electrode
varistor
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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.)
Granted
Application number
EP91117923A
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German (de)
French (fr)
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EP0482555B1 (en
Inventor
Van Doan Pham
Edmond Thuries
Joseph Martin
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Alstom Holdings SA
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GEC Alsthom SA
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Publication of EP0482555A1 publication Critical patent/EP0482555A1/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

Definitions

  • the present invention relates to a dielectric gas circuit breaker with incorporated capacitor.
  • Sulfur hexafluoride (SF6) circuit breakers for breaking large in-line fault currents often require the presence at their terminals of a high-value capacity, for example several thousand picofarads.
  • SF6 sulfur hexafluoride
  • this capacity is housed in a porcelain which, for reasons of insulation behavior, is necessarily of large dimensions.
  • An object of the invention is to provide a circuit breaker with capacitor in which the total volume is greatly reduced.
  • Another object of the invention is to provide a circuit breaker in which the capacitor is no longer connected to the terminals of the circuit breaker when the latter is in the tripped position.
  • the capacitor can be formed from metal sheets separated by a very thin insulating sheet with oil impregnation or in an SF6 environment.
  • the capacitor can be placed inside the chamber, even when there is already a varistor intended for protection against overvoltage.
  • Volume 2 is filled with a gas with good dielectric properties, such as sulfur hexafluoride, under a pressure of a few bars.
  • the moving element of the circuit breaker comprises a metal tube 9, extended by a corona hood 10, and provided with a transverse metal partition 11 carrying contact fingers 12 constituting the movable main contact and a blowing tube 13 extended by contact fingers 14 constituting the movable arcing contact.
  • the partition pierced with holes 15 for the passage of the blowing gas, carries a blowing nozzle 17 made of insulating material.
  • the blowing is provided by a fixed piston placed inside the tube 9 and not shown in FIG. 1.
  • the tube 9 is connected, by sliding contacts not shown, to a second socket outlet of the circuit breaker.
  • the ring 22 leaves the electrode 23 which moves with the moving element downwards in the figure, so that the capacitor is disconnected when the circuit breaker is in the tripped position.
  • FIG. 2 represents an alternative embodiment, in which the capacitor is arranged inside the breaking chamber, in parallel with a varistor; the elements common to Figures 1 and 2 have been given the same reference numbers.
  • the varistor elements can be based on zinc oxides (ZnO) or silicon carbide (CSi).
  • the resistance elements are carbon-based.
  • the tube 31 is fixed to the upper part of a metal cover 32 closing the cutting chamber at its upper part and in electrical contact with the metal plate 3.
  • the stack of elements is surmounted by a metal plate 33 connected by a braid 34 on the cover 32 and pressed by a spring 35 against the bottom of the cover.
  • the capacitor 45 is produced in a frustoconical shape mechanically and electrically connected, on the one hand, to the plate 3 and on the other hand to the metal block 36.
  • the capacitor 45 coaxial with the varistor and partially surrounding it, is connected in parallel on the varistor, this capacitor-varistor assembly being in parallel with the contacts of the circuit breaker.
  • FIG. 3 represents an alternative embodiment in which the rod 37 cooperates with a tubular electrode 46 mechanically and electrically connected to the tube 9.
  • a corona shield 47 integral with the rod 37 is placed in line with the end of the electrode .
  • the circuit breaker may include a second tubular electrode cooperating with another arm and placed symmetrically with respect to the axis of the tube 9.
  • FIGS. 4, 5 and 2 illustrate an alternative embodiment of the circuit breaker of the invention; the elements common to FIGS. 4, 5 and 2 have been given the same reference numbers.
  • the capacitor is produced by means of several cylindrical capacitor elements 45A placed in parallel, preferably 4 in number; they are mechanically and electrically connected on the one hand to the plate 3 (which can advantageously constitute with the plate 4 one and the same piece), and on the other hand to the block 36 which has shoulders 36A.
  • This embodiment has the advantage, over that of FIG. 2, of allowing the use of commercially available cylindrical capacitors.
  • the insertion mechanism of FIG. 3 applies to the embodiment of FIG. 4.
  • FIGS. 6 illustrates another embodiment of the mechanism for inserting the varistor and the capacitors.
  • the part 72 is electrically connected by a braid 73 to the tube 70.
  • the tube 70 is mechanically fixed and electrically connected to the tube 9, for example by solderings 74.
  • the head 72A carries a magnet 75 which, when the circuit breaker is in the on position, faces a magnet 76 carried by the arm 37.
  • the head 72A can simply be made of mild steel. It is possible to replace magnets 75 and 76 with magnets 75A and 76A.
  • the part 72 remains stationary, so that the duration of the contact between the electrode 22 and the tube 9, via the tube 70, the part 72 and the braid 73, East elongated relative to that of the embodiment of FIG. 3, of a duration corresponding to the displacement d of the tube 9.
  • the tube 70 drives the head 72A which comes to reposition itself as indicated in FIG. 6, precisely using the magnets, by inserting the varistor before the arcing contacts 14 and 7 come into contact.
  • a second insertion system identical to the one just described, will advantageously be placed symmetrically with respect to the axis of the tube 9.
  • the circuit breaker is a circuit breaker of the fifth generation of circuit breakers with SF6, after the double pressure circuit breakers of the 1960s (first generation), the self-blowing circuit breakers (second generation), the thermal volume circuit breakers (third generation), and thermal expansion circuit breakers with moving equipment with assisted movement.

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  • Circuit Breakers (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

Dielectric gas high-voltage circuit-breaker characterised in that it comprises a condenser (45A) arranged inside the cutoff chamber, possibly with a varistor in parallel, these elements being associated with a mechanism (37, 23) permitting their insertion during an opening and closing manoeuvre of the circuit-breaker. <IMAGE>

Description

La présente invention concerne un disjoncteur à gaz diélectrique à condensateur incorporé.The present invention relates to a dielectric gas circuit breaker with incorporated capacitor.

Les disjoncteurs à hexafluorure de soufre (SF6) pour la coupure de grands courants de défaut en ligne nécessitent souvent la présence à leurs bornes d'une capacité de grande valeur, par exemple de plusieurs milliers de picofarads. Dans la technique des disjoncteurs conventionnels (c'est-à-dire non blindés), cette capacité est logée dans une porcelaine qui pour des raisons de tenue d'isolement, est nécessairement de grandes dimensions.Sulfur hexafluoride (SF6) circuit breakers for breaking large in-line fault currents often require the presence at their terminals of a high-value capacity, for example several thousand picofarads. In the conventional circuit breaker technique (that is to say unshielded), this capacity is housed in a porcelain which, for reasons of insulation behavior, is necessarily of large dimensions.

Un but de l'invention est de réaliser un disjoncteur avec condensateur dans lequel le volume total est fortement réduit.An object of the invention is to provide a circuit breaker with capacitor in which the total volume is greatly reduced.

Un autre but de l'invention est de réaliser un disjoncteur dans lequel le condensateur n'est plus connecté aux bornes du disjoncteur lorsque celui-ci est en position déclenchée.Another object of the invention is to provide a circuit breaker in which the capacitor is no longer connected to the terminals of the circuit breaker when the latter is in the tripped position.

Cet objectif est atteint selon l'invention en plaçant le condensateur, en série avec un interrupteur, à l'intérieur de la porcelaine contenant la chambre de coupure.This objective is achieved according to the invention by placing the capacitor, in series with a switch, inside the porcelain containing the breaking chamber.

La Demanderesse a observé que, dans la plupart des cas, avec un condensateur de 5000 pF, l'interrupteur doit couper un courant capacitif ne dépassant pas 1 ampère. Ceci est relativement facile dans le SF6 à une pression de plusieurs bars, surtout si le contact mobile de l'interrupteur est solidaire de celui de la chambre principale, assurant ainsi une vitesse de déclenchement élevée.The Applicant has observed that, in most cases, with a 5000 pF capacitor, the switch must cut off a capacitive current not exceeding 1 amp. This is relatively easy in SF6 at a pressure of several bars, especially if the movable contact of the switch is integral with that of the main chamber, thus ensuring a high tripping speed.

Le condensateur peut être formé de feuilles métalliques séparées par une feuille isolante très mince avec imprégnation d'huile ou dans un environnement de SF6.The capacitor can be formed from metal sheets separated by a very thin insulating sheet with oil impregnation or in an SF6 environment.

Dans divers modes de réalisation, le condensateur peut être placé à l'intérieur de la chambre, même lorsque s'y trouve déjà une varistance destinée à la protection contre les surtensions.In various embodiments, the capacitor can be placed inside the chamber, even when there is already a varistor intended for protection against overvoltage.

L'invention est précisée maintenant par la description de divers modes de réalisation, en référence au dessin annexé dans lequel:

  • - la figure 1 est une vue partielle en coupe axiale d'une chambre de coupure avec condensateur placé à l'intérieur de la chambre, selon un premier mode de réalisation,
  • - la figure 2 est une vue partielle en coupe axiale d'une chambre de coupure avec condensateur et varistance placés à l'intérieur de la chambre, selon un premier mode de réalisation,
  • - les figures 3 illustre un mode de réalisation d'un mécanisme d'insertion de la varistance et des condensateurs,
  • - la figure 4 est une vue partielle en coupe axiale d'un disjoncteur avec condensateurs et varistance, selon un deuxième mode de réalisation de l'invention,
  • - la figure 5 est une vue en coupe selon la ligne V-V de la figure 4,
  • - la figure 60 est une vue d'un mécanisme d'insertion des condensateurs et de la varistance, selon une autre variante.
The invention is now clarified by the description of various embodiments, with reference to the appended drawing in which:
  • FIG. 1 is a partial view in axial section of a switching chamber with capacitor placed inside the chamber, according to a first embodiment,
  • FIG. 2 is a partial view in axial section of a switching chamber with capacitor and varistor placed inside the chamber, according to a first embodiment,
  • FIGS. 3 illustrates an embodiment of a mechanism for inserting the varistor and the capacitors,
  • FIG. 4 is a partial view in axial section of a circuit breaker with capacitors and varistor, according to a second embodiment of the invention,
  • FIG. 5 is a sectional view along the line VV in FIG. 4,
  • - Figure 60 is a view of a mechanism for inserting the capacitors and the varistor, according to another variant.

Dans la figure 1, la référence 1 désigne une enveloppe isolante, de préférence en porcelaine, délimitant un volume 2 contenant les éléments de coupure du disjoncteur. L'enveloppe isolante est fermée à une extrémité par une plaque métallique 3, fixée à une couronne métallique 4 constituant une première prise de courant et prolongée, à l'intérieur de l'enveloppe, par des bras 5 auxquels sont fixés un premier tube métallique 6 constituant le contact principal fixe, et un second tube 7, coaxial au premier, et constituant le contact d'arc fixe.In FIG. 1, the reference 1 designates an insulating envelope, preferably of porcelain, delimiting a volume 2 containing the breaking elements of the circuit breaker. The insulating envelope is closed at one end by a metal plate 3, fixed to a metal crown 4 constituting a first socket outlet and extended, inside the envelope, by arms 5 to which are fixed a first metal tube 6 constituting the main fixed contact, and a second tube 7, coaxial with the first, and constituting the fixed arcing contact.

Le volume 2 est rempli d'un gaz à bonnes propriétés diélectriques, tel que l'hexafluorure de soufre, sous une pression de quelques bars.Volume 2 is filled with a gas with good dielectric properties, such as sulfur hexafluoride, under a pressure of a few bars.

L'équipage mobile du disjoncteur comprend un tube métallique 9, prolongé par un capot pare-effluves 10, et muni d'une cloison métallique transversale 11 portant des doigts de contact 12 constituant le contact principal mobile et un tube de soufflage 13 prolongé par des doigts de contact 14 constituant le contact d'arc mobile. La cloison, percée de trous 15 pour le passage du gaz de soufflage, porte une buse de soufflage 17 en matériau isolant. Le soufflage est assuré par un piston fixe disposé à l'intérieur du tube 9 et non représenté dans la figure 1. Le tube 9 est relié, par des contacts glissants non représentés, à une deuxième prise de courant du disjoncteur.The moving element of the circuit breaker comprises a metal tube 9, extended by a corona hood 10, and provided with a transverse metal partition 11 carrying contact fingers 12 constituting the movable main contact and a blowing tube 13 extended by contact fingers 14 constituting the movable arcing contact. The partition, pierced with holes 15 for the passage of the blowing gas, carries a blowing nozzle 17 made of insulating material. The blowing is provided by a fixed piston placed inside the tube 9 and not shown in FIG. 1. The tube 9 is connected, by sliding contacts not shown, to a second socket outlet of the circuit breaker.

Selon l'invention, le condensateur associé à la chambre de coupure est logé à l'intérieur de cette chambre. Il est constitué par l'empilage d'un certain nombre d'éléments de condensateur 18, disposés dans une enveloppe cylindrique isolante 19 fixée par une extrémité à la plaque 3 et fermée à l'autre extrémité par un bloc métallique 20.According to the invention, the capacitor associated with the breaking chamber is housed inside this chamber. It consists of a stack of a number of capacitor elements 18, arranged in an insulating cylindrical envelope 19 fixed by one end to the plate 3 and closed at the other end by a metal block 20.

L'insertion du condensateur en parallèle sur les contacts du disjoncteur est assurée par des bras métalliques 37 fixés au bloc 20 et munis à leur extrémité d'un anneau de contact 22, par exemple en cuivre. Cet anneau est en contact avec une électrode tubulaire métallique 23 rapportée sur le tube 9.The insertion of the capacitor in parallel on the contacts of the circuit breaker is ensured by metal arms 37 fixed to the block 20 and provided at their end with a contact ring 22, for example made of copper. This ring is in contact with a metallic tubular electrode 23 attached to the tube 9.

Lorsque le disjoncteur est en position enclenchée (position représentée dans la figure 1), l'anneau 22 est en contact avec l'électrode 23, de sorte que le condensateur formé des éléments 18 est connecté en parallèle aux bornes du disjoncteur.When the circuit breaker is in the on position (position shown in Figure 1), the ring 22 is in contact with the electrode 23, so that the capacitor formed of the elements 18 is connected in parallel to the terminals of the circuit breaker.

Au cours du déclenchement, l'anneau 22 quitte l'électrode 23 qui se déplace avec l'équipage mobile vers le bas de la figure, de sorte que le condensateur est déconnecté lorsque le disjoncteur est en position déclenchée.During tripping, the ring 22 leaves the electrode 23 which moves with the moving element downwards in the figure, so that the capacitor is disconnected when the circuit breaker is in the tripped position.

La figure 2 représente une variante de réalisation, dans laquelle le condensateur est disposé à l'intérieur de la chambre de coupure, en parallèle avec une varistance; les éléments communs aux figures 1 et 2 ont reçu les mêmes numéros de référence.FIG. 2 represents an alternative embodiment, in which the capacitor is arranged inside the breaking chamber, in parallel with a varistor; the elements common to Figures 1 and 2 have been given the same reference numbers.

Le disjoncteur est représenté en position déclenchée et on aperçoit le piston de soufflage 25.The circuit breaker is shown in the tripped position and the blowing piston 25 can be seen.

La plaque 3 est percée d'un trou central pour permettre de loger une varistance constituée d'éléments 30 et une résistance en série constituée d'éléments 38, les éléments 30 et 38 étant empilés dans un tube isolant 31.The plate 3 is pierced with a central hole to allow a varistor made up of elements 30 and a series resistor made up of elements 38 to be accommodated, the elements 30 and 38 being stacked in an insulating tube 31.

Les éléments de varistance peuvent être à base d'oxydes de zinc (ZnO) ou de carbure de silicium (CSi). Les éléments de résistance sont à base de carbone.The varistor elements can be based on zinc oxides (ZnO) or silicon carbide (CSi). The resistance elements are carbon-based.

Le tube 31 est fixé à la partie supérieure d'un capot métallique 32 fermant la chambre de coupure à sa partie supérieure et en contact électrique avec la plaque métallique 3. L'empilement d'éléments est surmonté d'une plaque métallique 33 reliée par une tresse 34 au capot 32 et pressée par un ressort 35 contre le fond du capot.The tube 31 is fixed to the upper part of a metal cover 32 closing the cutting chamber at its upper part and in electrical contact with the metal plate 3. The stack of elements is surmounted by a metal plate 33 connected by a braid 34 on the cover 32 and pressed by a spring 35 against the bottom of the cover.

Le tube 31 est fermé à sa partie inférieure par un bloc métallique 36 portant des bras 37 à l'extrémité desquels est fixé un anneau métallique 22, par exemple en cuivre, coopérant avec l'électrode 23 pour l'insertion de la varistance.The tube 31 is closed at its lower part by a metal block 36 carrying arms 37 at the end of which is fixed a metal ring 22, for example made of copper, cooperating with the electrode 23 for the insertion of the varistor.

Le condensateur 45 est réalisé sous une forme tronconique relié mécaniquement et électriquement, d'une part, à la plaque 3 et d'autre part au bloc métallique 36. Le condensateur 45, coaxial à la varistance et l'entourant partiellement, est connecté en parallèle sur la varistance, cet ensemble condensateur-varistance étant en parallèle avec les contacts du disjoncteur.The capacitor 45 is produced in a frustoconical shape mechanically and electrically connected, on the one hand, to the plate 3 and on the other hand to the metal block 36. The capacitor 45, coaxial with the varistor and partially surrounding it, is connected in parallel on the varistor, this capacitor-varistor assembly being in parallel with the contacts of the circuit breaker.

Le rôle de la varistance est de limiter les surtensions, le rôle du condensateur de valeur élevée étant d'allonger le temps de retard (td selon les normes CEI) de la tension transitoire de rétablissement et de réduire la fréquence d'oscillation de la tension de la ligne, lors de la coupure du défaut de courte distance (défaut kilométrique).The role of the varistor is to limit overvoltages, the role of the high-value capacitor being to extend the delay time (td according to IEC standards) of the transient recovery voltage and to reduce the frequency of oscillation of the voltage. of the line, when cutting the short distance fault (mileage fault).

La figure 3 représente une variante de réalisation dans laquelle la tige 37 coopère avec une électrode tubulaire 46 reliée mécaniquement et électriquement au tube 9. Un anneau pare-effluves 47 solidaire de la tige 37 est placé au droit de l'extrémité de l'électrode. Pour des raisons de symétrie et d'équilibrage mécanique de l'appareil, le disjoncteur peut comporter une seconde électrode tubulaire coopérant avec un autre bras et placée symétriquement par rapport à l'axe du tube 9.FIG. 3 represents an alternative embodiment in which the rod 37 cooperates with a tubular electrode 46 mechanically and electrically connected to the tube 9. A corona shield 47 integral with the rod 37 is placed in line with the end of the electrode . For reasons of symmetry and mechanical balancing of the device, the circuit breaker may include a second tubular electrode cooperating with another arm and placed symmetrically with respect to the axis of the tube 9.

Les figures 4 et 5 illustrent une variante de réalisation du disjoncteur de l'invention; les éléments communs aux figures 4, 5 et 2 ont reçu les mêmes numéros de référence.Figures 4 and 5 illustrate an alternative embodiment of the circuit breaker of the invention; the elements common to FIGS. 4, 5 and 2 have been given the same reference numbers.

Le condensateur est réalisé au moyen de plusieurs éléments de condensateur cylindriques 45A mis en parallèle, de préférence au nombre de 4; ils sont reliés mécaniquement et électriquement d'une part à la plaque 3 (qui peut avantageusement constituer avec la plaque 4 une seule et même pièce), et d'autre part au bloc 36 qui présente des épaulements 36A.The capacitor is produced by means of several cylindrical capacitor elements 45A placed in parallel, preferably 4 in number; they are mechanically and electrically connected on the one hand to the plate 3 (which can advantageously constitute with the plate 4 one and the same piece), and on the other hand to the block 36 which has shoulders 36A.

Ce mode de réalisation présente l'avantage, sur celui de la figure 2, de permettre l'emploi de condensateurs cylindriques du commerce.This embodiment has the advantage, over that of FIG. 2, of allowing the use of commercially available cylindrical capacitors.

Le mécanisme d'insertion de la figure 3 s'applique au mode de réalisation de la figure 4.The insertion mechanism of FIG. 3 applies to the embodiment of FIG. 4.

La figures 6 illustre un autre mode de réalisation du mécanisme d'insertion de la varistance et des condensateurs.FIGS. 6 illustrates another embodiment of the mechanism for inserting the varistor and the capacitors.

Le bras 37 porte une électrode 22 qui coopère avec un tube métallique 70 délimitant un volume 77 et muni d'un couvercle supérieur 71 percé d'un trou; une pièce métallique 72 présentant une tête 72A, une tige 72B et une butée 72C, peut se déplacer vis-à-vis du tube sur une longueur d.The arm 37 carries an electrode 22 which cooperates with a metal tube 70 delimiting a volume 77 and provided with an upper cover 71 pierced with a hole; a metal part 72 having a head 72A, a rod 72B and a stop 72C, can move with respect to the tube over a length d.

La hauteur de la tête 72A est choisie pour ne pas venir au-dessus du capot 10 lorsque le disjoncteur est en position enclenchée (figure 6); la largeur du tube 72 est choisie pour que l'électrode 22 vienne en contact électrique avec le tube et la tête 72A au cours d'une manoeuvre d'ouverture du disjoncteur. Des trous 80 pratiqués dans le tube 70 évitent une compression du gaz trop rapide dans le volume 77 en début de course.The height of the head 72A is chosen so as not to come above the cover 10 when the circuit breaker is in the on position (FIG. 6); the width of the tube 72 is chosen so that the electrode 22 comes into electrical contact with the tube and the head 72A during an opening operation of the circuit breaker. Holes 80 made in the tube 70 prevent too rapid compression of the gas in the volume 77 at the start of the stroke.

La pièce 72 est électriquement reliée par une tresse 73 au tube 70. Le tube 70 est fixé mécaniquement et relié électriquement au tube 9, par exemple par des brasures 74.The part 72 is electrically connected by a braid 73 to the tube 70. The tube 70 is mechanically fixed and electrically connected to the tube 9, for example by solderings 74.

La tête 72A porte un aimant 75 qui, lorsque le disjoncteur est en position enclenchée, est en vis-à-vis d'un aimant 76 porté par le bras 37. La tête 72A peut être simplement en acier doux. Il est possible de remplacer les aimants 75 et 76 par les aimants 75A et 76A.The head 72A carries a magnet 75 which, when the circuit breaker is in the on position, faces a magnet 76 carried by the arm 37. The head 72A can simply be made of mild steel. It is possible to replace magnets 75 and 76 with magnets 75A and 76A.

Le fonctionnement est le suivant:

  • - en position enclenchée, la varistance et les condensateurs sont court-circuités par les contacts du disjoncteur,
  • - au déclenchement, l'équipage mobile est déplacé vers le bas de la figure.
The operation is as follows:
  • - in the engaged position, the varistor and the capacitors are short-circuited by the circuit breaker contacts,
  • - on release, the moving assembly is moved down the figure.

En raison de l'inertie et de l'attraction des aimants, la pièce 72 reste immobile, de sorte que la durée du contact entre l'électrode 22 et le tube 9, via le tube 70, la pièce 72 et la tresse 73, est allongée par rapport à celui de la réalisation de la figure 3, d'une durée correspondant au déplacement d du tube 9.Due to the inertia and the attraction of the magnets, the part 72 remains stationary, so that the duration of the contact between the electrode 22 and the tube 9, via the tube 70, the part 72 and the braid 73, East elongated relative to that of the embodiment of FIG. 3, of a duration corresponding to the displacement d of the tube 9.

Entre le moment où les contacts d'arc 7 et 14 se séparent et le moment où l'électrode 22 quitte la tête 72A, la varistance et les condensateurs sont insérés en parallèle sur l'arc de coupure. En fin de manoeuvre de déclenchement, la tête 72A retombe sur le couvercle 71. Il est possible de loger entre le couvercle 71 et la butée 72C un ressort de faible raideur pour faciliter le retour de la pièce 72 sur le couvercle 71 en fin de course.Between the moment when the arcing contacts 7 and 14 separate and the moment when the electrode 22 leaves the head 72A, the varistor and the capacitors are inserted in parallel on the breaking arc. At the end of the triggering maneuver, the head 72A falls back onto the cover 71. It is possible to accommodate between the cover 71 and the stop 72C a spring of low stiffness to facilitate the return of the part 72 on the cover 71 at the end of the stroke. .

A la fermeture du disjoncteur, le tube 70 entraîne la tête 72A qui vient se repositionner comme indiqué dans la figure 6, avec précision grâce aux aimants, en insérant la varistance avant l'entrée en contact des contacts d'arc 14 et 7.When the circuit breaker closes, the tube 70 drives the head 72A which comes to reposition itself as indicated in FIG. 6, precisely using the magnets, by inserting the varistor before the arcing contacts 14 and 7 come into contact.

Pour des raison d'équilibrage du dispositif, on placera avantageusement un deuxième système d'insertion, identique à celui qui vient d'être décrit, symétriquement par rapport à l'axe du tube 9.For reasons of balancing the device, a second insertion system, identical to the one just described, will advantageously be placed symmetrically with respect to the axis of the tube 9.

Le disjoncteur dont plusieurs modes de réalisation viennent d'être décrits est un disjoncteur de la cinquième génération des disjoncteurs à SF6, après les disjoncteurs à double pression des années 1960 (première génération), les disjoncteurs à auto-soufflage (deuxième génération), les disjoncteurs à volume thermique (troisième génération), et les disjoncteurs à expansion thermique avec équipage mobile à déplacement assisté.The circuit breaker, several embodiments of which have just been described, is a circuit breaker of the fifth generation of circuit breakers with SF6, after the double pressure circuit breakers of the 1960s (first generation), the self-blowing circuit breakers (second generation), the thermal volume circuit breakers (third generation), and thermal expansion circuit breakers with moving equipment with assisted movement.

Ce disjoncteur de la cinquième génération permet une meilleure coupure et est auto-protégé contre les surtensions. Les dispositions de la présente invention sont applicables aux disjoncteurs blindés à cuve à la masse (disjoncteurs sous enveloppe métallique).This fifth generation circuit breaker allows better breaking and is self-protected against overvoltages. The provisions of the present invention are applicable to shielded circuit-breakers with grounded tank (circuit-breakers in a metal casing).

Claims (10)

1. Disjoncteur à haute tension comprenant, pour chaque phase, au moins une chambre de coupure comprenant une enveloppe isolante cylindrique étanche rempli de gaz à bonnes propriétés diélectriques tel que l'hexafluorure de soufre SF6 et contenant un contact permanent fixe, un contact d'arc fixe et un équipage mobile comprenant des contacts permanents et des contacts d'arc, la chambre comprenant en outre un cylindre et un piston de soufflage et une buse de soufflage, caractérisé en ce qu'un condensateur (18) est disposé à l'intérieur de ladite enveloppe (1), connecté en parallèle sur les contacts (6, 12; 7,14) du disjoncteur et en série avec un interrupteur (37,23) dont l'ouverture est commandée par l'ouverture du disjoncteur.1. High voltage circuit breaker comprising, for each phase, at least one breaking chamber comprising a sealed cylindrical insulating envelope filled with gases with good dielectric properties such as sulfur hexafluoride SF6 and containing a fixed permanent contact, a contact of fixed arc and a moving element comprising permanent contacts and arcing contacts, the chamber further comprising a cylinder and a blowing piston and a blowing nozzle, characterized in that a capacitor (18) is arranged at the inside of said casing (1), connected in parallel on the contacts (6, 12; 7,14) of the circuit breaker and in series with a switch (37,23), the opening of which is controlled by the opening of the circuit breaker. 2. Disjoncteur selon la revendication 1, caractérisé en ce que le condensateur est constitué d'une pile d'éléments (18) disposés dans un tube isolant (19), une première extrémité de la pile étant reliée électriquement à une première prise de courant (4) du disjoncteur, une seconde extrémité de la pile étant reliée par des bras (37) à une électrode (23) solidaire d'une pièce (9) de l'équipage mobile reliée électriquement à une seconde prise de courant du disjoncteur.2. Circuit breaker according to claim 1, characterized in that the capacitor consists of a stack of elements (18) arranged in an insulating tube (19), a first end of the stack being electrically connected to a first outlet (4) of the circuit breaker, a second end of the battery being connected by arms (37) to an electrode (23) secured to a part (9) of the moving assembly electrically connected to a second socket outlet of the circuit breaker. 3. Disjoncteur selon la revendication 2, caractérisé en ce que ladite électrode (23) est un tube coaxial à ladite enveloppe (1).3. Circuit breaker according to claim 2, characterized in that said electrode (23) is a tube coaxial with said envelope (1). 4. Disjoncteur à haute tension comprenant, pour chaque phase, au moins une chambre de coupure comprenant une enveloppe isolante cylindrique étanche rempli de gaz à bonnes propriétés diélectriques et contenant un contact permanent fixe, un contact d'arc fixe et un équipage mobile comprenant des contacts permanents et des contacts d'arc, la chambre comprenant en outre un cylindre et un piston de soufflage et une buse de soufflage, caractérisé en ce qu'un condensateur (45, 45A) et une varistance (30) en matériau à base d'oxydes de zinc ou en carbure de silicium en série avec une résistance (38) sont disposés à l'intérieur de l'enveloppe, électriquement reliés en parallèle, connectés par un premier point commun à une première prise de courant (4) et associés à un mécanisme (37; 23, 46, 55, 70-72) permettant leur insertion momentanée en parallèle avec les contacts d'arc (7, 14) lors d'une opération de déclenchement ou d'enclenchement du disjoncteur.4. High-voltage circuit breaker comprising, for each phase, at least one breaking chamber comprising a sealed cylindrical insulating envelope filled with gases having good dielectric properties and containing a fixed permanent contact, a fixed arcing contact and a mobile assembly comprising permanent contacts and arcing contacts, the chamber further comprising a cylinder and a blowing piston and a blowing nozzle, characterized in that a capacitor (45, 45A) and a varistor (30) of material based on zinc or silicon carbide in series with a resistor (38) are arranged inside the enclosure, electrically connected in parallel, connected by a first common point to a first socket (4) and associated a mechanism (37; 23, 46, 55, 70-72) allowing their momentary insertion in parallel with the arcing contacts (7, 14) during a tripping or closing operation of the circuit breaker. 5. Disjoncteur selon la revendication 4, caractérisé en ce que la varistance et la résistance sont constituées d'un empilage d'éléments (30,38) disposés dans un tube isolant (31), le condensateur étant réalisé sous la forme d'un tronc de cône (45) coaxial audit tube (31) et l'entourant au moins partiellement.5. Circuit breaker according to claim 4, characterized in that the varistor and the resistance consist of a stack of elements (30,38) arranged in an insulating tube (31), the capacitor being produced in the form of a truncated cone (45) coaxial with said tube (31) and surrounding it at least partially. 6. Disjoncteur selon la revendication 4, caractérisé en ce que la varistance est constitué d'un empilage d'éléments (30) disposés dans un tube isolant (31), le condensateur étant réalisé sous la forme d'éléments cylindriques (45A) reliés électriquement en parallèle et disposés parallèlement à l'axe de l'enveloppe (1).6. Circuit breaker according to claim 4, characterized in that the varistor consists of a stack of elements (30) arranged in an insulating tube (31), the capacitor being produced in the form of connected cylindrical elements (45A) electrically in parallel and arranged parallel to the axis of the envelope (1). 7. Disjoncteur selon l'une des revendications 4 à 6, caractérisé en ce que le mécanisme d'insertion comprend au moins un bras métallique (37) relié à l'un des points communs à la varistance et au condensateur, coopérant avec une électrode (46,72) en liaison électrique avec la seconde prise de courant.7. Circuit breaker according to one of claims 4 to 6, characterized in that the insertion mechanism comprises at least one metal arm (37) connected to one of the points common to the varistor and to the capacitor, cooperating with an electrode (46,72) in electrical connection with the second socket. 8. Disjoncteur selon la revendication 7, caractérisé en ce que la seconde électrode est un tube 46 fixé à une pièce (9) de l'équipage mobile.8. Circuit breaker according to claim 7, characterized in that the second electrode is a tube 46 fixed to a part (9) of the movable assembly. 9. Disjoncteur selon la revendication 7, caractérisé en ce que la seconde électrode comprend une pièce métallique (72) ayant une tête (72A) en contact électrique avec le bras (37) lorsque le disjoncteur est en position enclenchée et un pied (72C) pouvant coulisser dans une pièce tubulaire métallique (70) mécaniquement et électriquement reliée à une pièce (9) de l'équipage mobile électriquement reliée à la seconde prise de courant, ledit pied étant électriquement relié à ladite pièce tubulaire par une tresse métallique (73), ladite tête (72A) portant un aimant (75) qui se trouve au droit d'un aimant (76) porté par ledit bras (37) lorsque le disjoncteur est en position enclenchée, ladite pièce métallique (72) présentant une inertie et une force d'attraction suffisantes pour lui permettre de rester un instant au contact de l'électrode (22) malgré le déplacement de l'équipage mobile lors d'une opération de déclenchement du disjoncteur.9. Circuit breaker according to claim 7, characterized in that the second electrode comprises a metal part (72) having a head (72A) in electrical contact with the arm (37) when the circuit breaker is in the engaged position and a foot (72C) slidable in a metallic tubular piece (70) mechanically and electrically connected to a piece (9) of the movable assembly electrically connected to the second socket, said foot being electrically connected to said tubular piece by a metallic braid (73) , said head (72A) carrying a magnet (75) which is located in line with a magnet (76) carried by said arm (37) when the circuit breaker is in the engaged position, said metal part (72) having an inertia and a sufficient attraction force to allow it to remain for an instant in contact with the electrode (22) despite the movement of the moving assembly during a tripping operation of the circuit breaker. 10. Disjoncteur sous enveloppe métallique caractérisé en ce qu'il comprend les éléments de l'une des revendications 1 à 9.10. Circuit breaker in a metal casing characterized in that it comprises the elements of one of claims 1 to 9.
EP91117923A 1990-10-24 1991-10-21 SF6 circuit breaker with built-in condensor Expired - Lifetime EP0482555B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9013176A FR2668648B1 (en) 1990-10-24 1990-10-24 SF6 CIRCUIT BREAKER WITH INCORPORATED CAPACITOR.
FR9013176 1990-10-24

Publications (2)

Publication Number Publication Date
EP0482555A1 true EP0482555A1 (en) 1992-04-29
EP0482555B1 EP0482555B1 (en) 1995-12-20

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Family Applications (1)

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EP91117923A Expired - Lifetime EP0482555B1 (en) 1990-10-24 1991-10-21 SF6 circuit breaker with built-in condensor

Country Status (7)

Country Link
US (1) US5266758A (en)
EP (1) EP0482555B1 (en)
AT (1) ATE131956T1 (en)
CA (1) CA2053951C (en)
DE (1) DE69115635T2 (en)
ES (1) ES2081415T3 (en)
FR (1) FR2668648B1 (en)

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EP0579243A1 (en) * 1992-07-17 1994-01-19 Kabushiki Kaisha Toshiba Resistor-provided UHV breaker
EP0620578A1 (en) * 1993-04-13 1994-10-19 Gec Alsthom T Et D Sa Insertion device for circuit breaker
WO1997025732A1 (en) * 1996-01-05 1997-07-17 Siemens Aktiengesellschaft Open-air high-voltage circuit breaker
FR2765388A1 (en) * 1997-06-26 1998-12-31 Gec Alsthom T & D Sa Circuit breaker with insertion resistor and coaxial structure
EP0966013A1 (en) * 1998-06-19 1999-12-22 Alstom France SA Limiting device dead tank high voltage circuit breaker
EP0993012A1 (en) * 1998-10-08 2000-04-12 Alstom France SA Closing resistor assembly for high voltage apparatus

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JP2679499B2 (en) * 1991-12-27 1997-11-19 三菱電機株式会社 Circuit breaker and switch operating mechanism
TW278262B (en) * 1994-03-18 1996-06-11 Hitachi Seisakusyo Kk
JP3259587B2 (en) * 1995-04-20 2002-02-25 株式会社日立製作所 Disconnector
US6236010B1 (en) 1999-07-14 2001-05-22 Southern States, Inc. Circuit interrupter including a penetrating electrical contact with grip and release structure
US6316742B1 (en) 1999-07-14 2001-11-13 Southern States, Inc. Limited restrike circuit interrupter used as a line capacitor and load switch
CN101167227A (en) * 2005-04-27 2008-04-23 Abb技术有限公司 A device for reduction of voltage derivative
CN103578843A (en) * 2013-11-08 2014-02-12 西安盟创电器有限公司 Non-reignition disconnector
CN105676095A (en) * 2014-11-20 2016-06-15 江苏启源雷宇电气科技有限公司 Power-frequency voltage-withstand test device in SF6 armored type
CN109755065B (en) * 2017-11-03 2023-10-24 江苏明及电气股份有限公司 Arc extinguishing mechanism for load switch
FR3091407B1 (en) 2018-12-27 2021-10-29 Inst Supergrid High voltage direct current cut-off device with capacitive buffer circuit and control method
FR3091408B1 (en) 2018-12-27 2021-01-15 Inst Supergrid High voltage direct current cut-off device with adaptive oscillation circuit and control method
FR3094136B1 (en) 2019-03-22 2021-04-02 Inst Supergrid High voltage direct current cut-off device with resonator and commutation
FR3107394B1 (en) * 2020-02-13 2023-08-11 Inst Supergrid Mechanical current breaking device for high voltage direct current with capacitance in a secondary path, installation and method with such a device
US20230187923A1 (en) * 2020-04-14 2023-06-15 Drexel University A solid-state circuit breaker based on a wireless coupling and resonant circuit for mvdc systems

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0579243A1 (en) * 1992-07-17 1994-01-19 Kabushiki Kaisha Toshiba Resistor-provided UHV breaker
EP0620578A1 (en) * 1993-04-13 1994-10-19 Gec Alsthom T Et D Sa Insertion device for circuit breaker
FR2704088A1 (en) * 1993-04-13 1994-10-21 Gec Alsthom T & D Sa Insertion device for circuit breaker.
WO1997025732A1 (en) * 1996-01-05 1997-07-17 Siemens Aktiengesellschaft Open-air high-voltage circuit breaker
US6091040A (en) * 1996-01-05 2000-07-18 Siemens Ag Outdoor high-voltage power circuit breaker
FR2765388A1 (en) * 1997-06-26 1998-12-31 Gec Alsthom T & D Sa Circuit breaker with insertion resistor and coaxial structure
EP0966013A1 (en) * 1998-06-19 1999-12-22 Alstom France SA Limiting device dead tank high voltage circuit breaker
FR2780210A1 (en) * 1998-06-19 1999-12-24 Alsthom Gec LIMITING DEVICE FOR A HIGH-VOLTAGE CIRCUIT BREAKER WITH A GROUNDED METAL TANK
US6180907B1 (en) 1998-06-19 2001-01-30 Alstom France Sa Limiter device for a high voltage circuit breaker having a grounded metal tank
EP0993012A1 (en) * 1998-10-08 2000-04-12 Alstom France SA Closing resistor assembly for high voltage apparatus
FR2784500A1 (en) * 1998-10-08 2000-04-14 Alstom Technology CLOSING RESISTOR MOUNTING FOR HIGH VOLTAGE EQUIPMENT
US6201204B1 (en) 1998-10-08 2001-03-13 Alstom France Sa Closure resistor assembly for high voltage electrical gear

Also Published As

Publication number Publication date
DE69115635D1 (en) 1996-02-01
FR2668648B1 (en) 1992-12-24
US5266758A (en) 1993-11-30
EP0482555B1 (en) 1995-12-20
ES2081415T3 (en) 1996-03-16
ATE131956T1 (en) 1996-01-15
DE69115635T2 (en) 1996-09-19
FR2668648A1 (en) 1992-04-30
CA2053951C (en) 1996-11-19
CA2053951A1 (en) 1992-04-25

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