EP0536039B1 - Ultra-high voltage circuit breaker - Google Patents

Ultra-high voltage circuit breaker Download PDF

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Publication number
EP0536039B1
EP0536039B1 EP92402665A EP92402665A EP0536039B1 EP 0536039 B1 EP0536039 B1 EP 0536039B1 EP 92402665 A EP92402665 A EP 92402665A EP 92402665 A EP92402665 A EP 92402665A EP 0536039 B1 EP0536039 B1 EP 0536039B1
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EP
European Patent Office
Prior art keywords
tube
chamber
rod
interrupting
switch
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EP92402665A
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German (de)
French (fr)
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EP0536039A1 (en
Inventor
Van Doan Pham
Joseph Martin
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Alstom Holdings SA
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GEC Alsthom SA
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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 breaking chamber for ultra high voltage comprising a main chamber comprising an insulating envelope containing permanent contacts and arcing contacts and an auxiliary chamber mounted in parallel to the main chamber which comprises an insulating envelope containing a opening varistor associated with a trip switch having an opening delay mechanism.
  • the present invention proposes to combine, inter alia, these two known techniques for producing a breaking chamber for a UHT circuit breaker meeting the overvoltage requirements.
  • an opening varistor instead of a resistor makes it possible to more effectively reduce overvoltages and to avoid having a blowing by compression on the trip switch. Indeed, thanks to its variable resistance with a large coefficient of non-linearity such as zinc oxide, the varistor adapts better with the circuit to reduce the overvoltage. Power outage residual is done automatically without blowing when the voltage decreases to zero.
  • the arrangement of the delay mechanism inside the envelope of the auxiliary chamber makes it possible to protect it from external effects such as rain, wind or hail.
  • the actuating member is a metal hose directly connected to the operating rod of the main chamber.
  • the varistor consists of a stack of varistors in the form of cylindrical pellets placed in an insulating tube.
  • the stop integral with the lower part of the rod is made of polytetrafluoroethylene
  • the invention also relates to a circuit breaker for ultra high voltage, multi-break at SF6, comprising breaking chambers, main and auxiliary, mounted in series, arranged vertically in a candle and equipped with distribution capacitors, with a main switching chamber per support column, the switching chambers of which conform to any one of claims 1 to 4.
  • Figure 1 is a partial sectional front view of a switching chamber according to the invention.
  • Figure 2 is a detail sectional view of the insertion device of the auxiliary chamber.
  • FIG. 3 represents a phase of a UHT circuit breaker equipped with such breaking chambers.
  • FIG. 1 the main switching chamber 1, the auxiliary chamber 2 and partially the support column 3 are shown.
  • the main chamber 1 is of the type of the breaking chamber described in the certificate of addition no. 2 503 448. It comprises an insulating envelope, for example made of ceramic, which comprises at its upper end a plate 5 connected to a first outlet current.
  • the envelope is surmounted by a cover 10 housing the two closing resistors, the first of which is formed by a stack of cylindrical resistive pellets, based on carbon for example, and the second of a stack of annular resistors arranged coaxially and outside the first.
  • a semi-mobile insertion device called an interlock switch, has a tubular insertion contact of the first resistance at its lower end and a tubular insertion contact of the second resistance at its upper part.
  • a second socket is connected to the lower plate 5A.
  • an auxiliary chamber 2 is mounted, the plates 5 and 5A of the main chamber 1 being connected respectively by the conductor 23 and by the conductive support plate 24 to the plates 21 and 22 of the auxiliary chamber 2
  • This chamber 2 comprises an insulating envelope 20, for example made of porcelain, in which is housed an opening varistor 26 associated with a trip switch 30, shown diagrammatically in FIG. 1.
  • a cover 11 extends the envelope 20 in order to allow the housing of the varistor 26 which consists of a stack of varistors in the form of cylindrical pellets, based on zinc oxide, arranged in an insulating tube 27, in a manner known per se.
  • the switch 30 is actuated by a mechanism directly connected to the operating rod 121 of the main chamber 1.
  • the latter is housed in an insulating column 120 supporting the main chamber 1.
  • the rod 121 is extended by a metal portion 122 connected to the mobile, conventional equipment of the main bedroom 1. It is also connected to a metal hose 123 fixed to the trip switch 30 and this hose 123 is placed in a rigid metal sheath 124.
  • Rings 200 and 201 are arranged below and above the chambers 1 and 2, in order to reduce the visual emanations (Corona effect) and to improve the dielectric strength of the breaking chamber and of the support insulator.
  • carbon-based resistive pads are mounted in series with the varistor discs 26 to limit the residual current to a certain value, in the event of a high restored voltage cut.
  • FIG. 2 shows precisely the trip switch 30 of the auxiliary chamber 2.
  • This switch is mounted on the lower plate 22 of the auxiliary chamber 2 through which the flexible pipe 123 passes through its sheath 124. More precisely, a metal support tube 31 is fixed on the plate 22 in which another metal tube 32 is slidably mounted. having at its lower end an insulating diametrical bar to which the end of the hose 123 is fixed by means of a washer. An electrical sliding contact connects the two tubes 31 and 32.
  • the upper end of the tube 32 is closed by an insulating washer 35. Inside the tube 32, is arranged a rod 37, for example of high resistance brass, which by its upper part passes through the washer 35 and supports a sleeve contact 53, preferably screwed and copper.
  • the lower part of the rod 37 has a diameter greater than that of the central part of the rod 37 and has a threaded bore 37B drilled at its lower end.
  • a shoulder 37C serves to support a ring 38, with a conical external profile, preferably made of polytetrafluoroethylene, and provided with an O-ring 39.
  • the conical ring 38 is held in place by the head of a bolt 40, screwed into the bore 37B with interposition of seals 41 and 42.
  • the head of the bolt 40 is electrically connected to the tube 32 by at least one contact finger 43.
  • a metal spring 34 is disposed between the shoulder 37C and the washer 35.
  • the tube 32 has a conical inner shoulder intended to receive the conical ring 38 in abutment.
  • a metal closure part 52 retaining the varistors 26 and provided with a tube 50 terminated by contact fingers 51 intended to cooperate with the sleeve 53 .
  • the setting of the insertion and deactivation time of the varistor 26 is done by the dimensioning of the switch 30.
  • a parameter is decisive, namely the length of the rod 37 under the sleeve 53 projecting from the washer 35, when the spring 34 is at the end of compression, and corresponding to the length of the displacement of the tube 32 before driving the rod 37 at the opening.
  • FIG. 3 is a diagrammatic view of a phase of a UHT multi-breaker circuit breaker with SF6, more precisely of 1150 kV comprising four chambers. For a voltage of 1500kV, it would include five chambers in series. The vertical arrangement is by candlelight with one chamber per support column, which facilitates the mechanical strength of the chambers.
  • the chambers are as described above, with their main chamber 1 containing the arrangement of closing resistors 6, the cut-off contacts 7 and the insertion switch 8 of the resistors 6, called the switching switch, and their auxiliary chamber 2 containing the opening varistor 26 and the trip switch 30 with delay mechanism.
  • distribution capacitors 4 are conventionally mounted.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Push-Button Switches (AREA)
  • Scissors And Nippers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

The present invention relates to an ultra-high-tension interrupting chamber comprising a main chamber including an insulating case containing permanent contacts, arcing contacts and two closing resistors inserted by means of semi-moving "make switch" device putting a "first" one of the resistors into operation before the "second" resistor. An auxiliary chamber is connected in parallel with the main chamber, which auxiliary chamber includes an insulating casing containing an opening varistor associated with a break switch having a slow-release opening mechanism situated inside the casing.

Description

La présente invention se rapporte à une chambre de coupure pour ultra haute tension comprenant une chambre principale comportant une enveloppe isolante contenant des contacts permanents et des contacts d'arc et une chambre auxiliaire montée en parallèle à la chambre principale qui comprend une enveloppe isolante contenant une varistance d'ouverture associée à un interrupteur de déclenchement présentant un mécanisme de retardement de l'ouverture.The present invention relates to a breaking chamber for ultra high voltage comprising a main chamber comprising an insulating envelope containing permanent contacts and arcing contacts and an auxiliary chamber mounted in parallel to the main chamber which comprises an insulating envelope containing a opening varistor associated with a trip switch having an opening delay mechanism.

Une telle chambre de coupure est décrite dans le document de brevet EP-A-0 444 568.Such an interrupting chamber is described in patent document EP-A-0 444 568.

Il est connu que les surtensions de manoeuvre dans l'air atmosphérique ne suivent pas proportionnellement la hauteur d'isolement. C'est pourquoi, en ultra haute tension (tension supérieure ou égale à 1000 kV, appelée ci-après UHT), des surtensions de manoeuvre extrêmement faibles sont imposées aux disjoncteurs, par exemple 1,6 pu au lieu de 3 pu admis en 245 kV.It is known that the operating overvoltages in atmospheric air do not proportionally follow the height of isolation. This is why, in ultra high voltage (voltage greater than or equal to 1000 kV, hereinafter called UHT), extremely low operating overvoltages are imposed on the circuit breakers, for example 1.6 pu instead of 3 pu allowed in 245 kV.

La revue de la CIGRE, Electra de janvier 1989 (n°122, pages 43,44) divulgue que les disjoncteurs UHT seront équipés de résistances de fermeture et de résistances d'ouverture.The CIGRE review, Electra of January 1989 (n ° 122, pages 43,44) discloses that the UHT circuit breakers will be equipped with closing resistors and opening resistors.

Dans le certificat d'addition français n°2 503 448 déposé le 31 mars 1981 par la Déposante, est décrit un disjoncteur haute tension à gaz comprimé comprenant deux résistances de fermeture dont les dispositifs d'insertion sont solidaires, celui de la première résistance comprenant un contact semi-mobile tubulaire coopérant avec un contact relié à la seconde résistance qui est constituée d'une pile des résistances annulaires disposée coaxialement et à l'extérieur de la première résistance.In the French addition certificate No. 2 503 448 deposited on March 31, 1981 by the Applicant, a high voltage compressed gas circuit breaker comprising two closing resistors is described, the insertion devices of which are integral, that of the first resistance comprising a semi-mobile tubular contact cooperating with a contact connected to the second resistor which consists of a stack of annular resistors arranged coaxially and outside the first resistor.

Dans ledit document de brevet EP-A-0 444 568 déposée par la Déposante, est divulgué un disjoncteur haute tension assisté par une varistance disposée dans une chambre distincte de la chambre de coupure, dite chambre auxiliaire, et montée en série avec un interrupteur de déclenchement comprenant un contact mobile réalisé sous la forme d'une tige métallique fixée à un flexible métallique reliant les deux chambres par l'intermédiaire d'un retardateur d'ouverture situé à l'extérieur de celles-ci et actionné par la tringle de commande de la chambre de coupure.In said patent document EP-A-0 444 568 filed by the Applicant, there is disclosed a high-voltage circuit breaker assisted by a varistor disposed in a chamber separate from the breaking chamber, called the auxiliary chamber, and connected in series with a switch release comprising a movable contact made in the form of a metal rod fixed to a metal hose connecting the two chambers by means of an opening retarder located outside of these and actuated by the control rod of the breaking chamber.

La présente invention propose d'associer, entre autres, ces deux techniques connues pour réaliser une chambre de coupure pour un disjoncteur UHT répondant aux exigences de surtension.The present invention proposes to combine, inter alia, these two known techniques for producing a breaking chamber for a UHT circuit breaker meeting the overvoltage requirements.

Pour ce faire, la chambre de coupure selon l'invention est caractérisée en ce que

  • la chambre principale comporte deux résistances de fermeture qui sont insérées par un dispositif semi-mobile dit interrupteur d'enclenchement mettant en fonction l'une des résistances, dite première résistance, avant l'autre, dite seconde résistance,
  • le mécanisme de retardement de l'ouverture de l'interrupteur de déclenchement est à inertie et situé à l'intérieur de l'enveloppe de la chambre auxiliaire,
  • cet interrupteur comprend un tube support métallique fixe dans lequel est monté coulissant longitudinalement un autre tube métallique relié électriquement au tube support et relié par son extrémité inférieure à l'extrémité d'un organe d'actionnement, l'extrémité supérieure du tube étant fermée par une rondelle isolante et traversée par une tige métallique reliée électriquement au tube et dont la partie supérieure supporte un manchon de contact coopérant avec des doigts de contact montés à l'extrémité inférieure de la varistance, la partie inférieure de la tige étant pourvue d'une butée conique destinée à coopérer avec un épaulement intérieur de forme conique complémentaire du tube, un ressort étant disposé à l'intérieur du tube et autour de la tige entre l'extrémité supérieur du tube et l'extrémité inférieure de la tige, le ressort étant détendu lorsque l'interrupteur est en position de repos enclenchée ou déclenchée.
To do this, the breaking chamber according to the invention is characterized in that
  • the main chamber has two closing resistors which are inserted by a semi-mobile device called an interlock switch putting one of the resistances into operation, called the first resistance, before the other, called the second resistance,
  • the mechanism for delaying the opening of the trip switch is inertial and located inside the enclosure of the auxiliary chamber,
  • this switch comprises a fixed metal support tube in which is slidably mounted longitudinally another metal tube electrically connected to the support tube and connected by its lower end to the end of an actuating member, the upper end of the tube being closed by an insulating washer and crossed by a metal rod electrically connected to the tube and the upper part of which supports a contact sleeve cooperating with contact fingers mounted at the lower end of the varistor, the lower part of the rod being provided with a conical stop intended to cooperate with an internal shoulder of conical shape complementary to the tube, a spring being disposed inside the tube and around the rod between the upper end of the tube and the lower end of the rod, the spring being relaxed when the switch is in the engaged or released rest position.

L'utilisation d'une varistance d'ouverture au lieu d'une résistance permet de réduire plus efficacement les surtensions et d'éviter d'avoir un soufflage par compression sur l'interrupteur de déclenchement. En effet, grâce à sa résistance variable à grand coefficient de non linéarité tel que l'oxyde de zinc, la varistance s'adapte mieux avec le circuit pour réduire la surtension. La coupure du courant résiduel se fait automatiquement sans soufflage lors de la décroissance de la tension vers zéro.The use of an opening varistor instead of a resistor makes it possible to more effectively reduce overvoltages and to avoid having a blowing by compression on the trip switch. Indeed, thanks to its variable resistance with a large coefficient of non-linearity such as zinc oxide, the varistor adapts better with the circuit to reduce the overvoltage. Power outage residual is done automatically without blowing when the voltage decreases to zero.

La disposition du mécanisme de retardement à l'intérieur de l'enveloppe de la chambre auxiliaire permet de le protéger des effets extérieurs tels que la pluie, le vent ou la grêle.The arrangement of the delay mechanism inside the envelope of the auxiliary chamber makes it possible to protect it from external effects such as rain, wind or hail.

Grâce au mécanisme de retardement à inertie, aucun dispositif retardateur spécifique séparé n'est à monter sur les chambres.Thanks to the inertia delay mechanism, no separate specific delay device is to be mounted on the chambers.

Selon un mode de réalisation préféré, l'organe d'actionnement est un flexible métallique directement relié à la tringle de manoeuvre de la chambre principale.According to a preferred embodiment, the actuating member is a metal hose directly connected to the operating rod of the main chamber.

Ainsi est réalisée un dispositif de commande unique de la chambre principale et de la chambre auxiliaire particulièrement simple et fiable.Thus, a single control device for the main chamber and the particularly simple and reliable auxiliary chamber is produced.

De préférence, la varistance est constituée d'une pile de varistances en forme de pastilles cylindriques disposée dans un tube isolant.Preferably, the varistor consists of a stack of varistors in the form of cylindrical pellets placed in an insulating tube.

De préférence, la butée solidaire de la partie inférieure de la tige est en polytétrafluoroéthylène L'invention concerne également un disjoncteur pour ultra haute tension, multicoupure à SF6, comportant des chambres de coupure, principales et auxiliaires, montées en série, disposées verticalement en chandelle et équipées de condensateurs de répartition, avec une chambre de coupure principale par colonne support, dont les chambres de coupure sont conformes à l'une quelconque des revendications 1 à 4.Preferably, the stop integral with the lower part of the rod is made of polytetrafluoroethylene The invention also relates to a circuit breaker for ultra high voltage, multi-break at SF6, comprising breaking chambers, main and auxiliary, mounted in series, arranged vertically in a candle and equipped with distribution capacitors, with a main switching chamber per support column, the switching chambers of which conform to any one of claims 1 to 4.

L'invention est exposée ci-après plus en détail à l'aide de dessins représentant seulement un mode de réalisation.The invention is set out below in more detail with the aid of drawings representing only one embodiment.

La figure 1 est une vue de face en coupe partielle d'une chambre de coupure conforme à l'invention.Figure 1 is a partial sectional front view of a switching chamber according to the invention.

La figure 2 est une vue en coupe de détail du dispositif d'insertion de la chambre auxiliaire.Figure 2 is a detail sectional view of the insertion device of the auxiliary chamber.

La figure 3 représente une phase d'un disjoncteur UHT équipé de telles chambres de coupure.FIG. 3 represents a phase of a UHT circuit breaker equipped with such breaking chambers.

Sur la figure 1, sont représentées la chambre de coupure principale 1, la chambre auxiliaire 2 et partiellement la colonne support 3.In FIG. 1, the main switching chamber 1, the auxiliary chamber 2 and partially the support column 3 are shown.

La chambre principale 1 est du type de la chambre de coupure décrite dans le certificat d'addition n°2 503 448. Elle comprend une enveloppe isolante, par exemple en céramique, qui comporte à son extrémité supérieure un plateau 5 relié à une première prise de courant. L'enveloppe est surmontée d'un capot 10 logeant les deux résistances de fermeture, dont la première est formée d'un empilage de pastilles résistives cylindriques, à base de carbone par exemple, et la seconde d'une pile de résistances annulaires disposées coaxialement et à l'extérieur de la première. Un dispositif semi-mobile d'insertion, dit interrupteur d'enclenchement, comporte à son extrémité inférieure un contact d'insertion tubulaire de la première résistance et à sa partie supérieure un contact d'insertion tubulaire de la seconde résistance. Une seconde prise de courant est reliée au plateau inférieur 5A.The main chamber 1 is of the type of the breaking chamber described in the certificate of addition no. 2 503 448. It comprises an insulating envelope, for example made of ceramic, which comprises at its upper end a plate 5 connected to a first outlet current. The envelope is surmounted by a cover 10 housing the two closing resistors, the first of which is formed by a stack of cylindrical resistive pellets, based on carbon for example, and the second of a stack of annular resistors arranged coaxially and outside the first. A semi-mobile insertion device, called an interlock switch, has a tubular insertion contact of the first resistance at its lower end and a tubular insertion contact of the second resistance at its upper part. A second socket is connected to the lower plate 5A.

En parallèle à cette chambre principale 1, est montée une chambre auxiliaire 2, les plateaux 5 et 5A de la chambre principale 1 étant reliés respectivement par le conducteur 23 et par la plaque conductrice de support 24 aux plateaux 21 et 22 de la chambre auxiliaire 2. Cette chambre 2 comprend une enveloppe isolante 20, par exemple en porcelaine, dans laquelle est logée une varistance d'ouverture 26 associée à un interrupteur de déclenchement 30, schématisé sur la figure 1. Un capot 11 prolonge l'enveloppe 20 afin de permettre le logement de la varistance 26 qui est constituée d'une pile de varistances en forme de pastilles cylindriques, à base d'oxyde de zinc, disposée dans un tube isolant 27, de façon connue en soi.In parallel to this main chamber 1, an auxiliary chamber 2 is mounted, the plates 5 and 5A of the main chamber 1 being connected respectively by the conductor 23 and by the conductive support plate 24 to the plates 21 and 22 of the auxiliary chamber 2 This chamber 2 comprises an insulating envelope 20, for example made of porcelain, in which is housed an opening varistor 26 associated with a trip switch 30, shown diagrammatically in FIG. 1. A cover 11 extends the envelope 20 in order to allow the housing of the varistor 26 which consists of a stack of varistors in the form of cylindrical pellets, based on zinc oxide, arranged in an insulating tube 27, in a manner known per se.

L'interrupteur 30 est actionné par un mécanisme directement relié à la tringle de manoeuvre 121 de la chambre principale 1. Cette dernière est logée dans une colonne isolante 120 supportant la chambre principale 1. La tringle 121 est prolongée par une portion métallique 122 reliée à l'équipage mobile, classique, de la chambre principale 1. Elle est également reliée à un flexible métallique 123 fixé à l'interrupteur de déclenchement 30 et ce flexible 123 est placé dans une gaine rigide métallique 124.The switch 30 is actuated by a mechanism directly connected to the operating rod 121 of the main chamber 1. The latter is housed in an insulating column 120 supporting the main chamber 1. The rod 121 is extended by a metal portion 122 connected to the mobile, conventional equipment of the main bedroom 1. It is also connected to a metal hose 123 fixed to the trip switch 30 and this hose 123 is placed in a rigid metal sheath 124.

Des anneaux 200 et 201 sont disposés au-dessous et au-dessus des chambres 1 et 2, afin de réduire les effluves visuels (effet Corona) et d'améliorer la tenue diélectrique de la chambre de coupure et de l'isolateur de support.Rings 200 and 201 are arranged below and above the chambers 1 and 2, in order to reduce the visual emanations (Corona effect) and to improve the dielectric strength of the breaking chamber and of the support insulator.

De préférence, des pastilles résistives à base de carbone sont montées en série avec les disques de varistance 26 pour limiter le courant résiduel à une certaine valeur, en cas de coupure de tension rétablie élevée.Preferably, carbon-based resistive pads are mounted in series with the varistor discs 26 to limit the residual current to a certain value, in the event of a high restored voltage cut.

La figure 2 représente précisément l'interrupteur de déclenchement 30 de la chambre auxiliaire 2.FIG. 2 shows precisely the trip switch 30 of the auxiliary chamber 2.

Cet interrupteur est monté sur le plateau inférieur 22 de la chambre auxiliaire 2 au travers duquel passe le flexible 123 dans sa gaine 124. Plus exactement est fixé sur le plateau 22 un tube support métallique 31 dans lequel est monté coulissant longitudinalement un autre tube métallique 32 présentant à son extrémité inférieure une barrette diamétrale isolante à laquelle est fixée par l'intermédiaire d'une rondelle l'extrémité du flexible 123. Un contact glissant électrique relie les deux tubes 31 et 32.This switch is mounted on the lower plate 22 of the auxiliary chamber 2 through which the flexible pipe 123 passes through its sheath 124. More precisely, a metal support tube 31 is fixed on the plate 22 in which another metal tube 32 is slidably mounted. having at its lower end an insulating diametrical bar to which the end of the hose 123 is fixed by means of a washer. An electrical sliding contact connects the two tubes 31 and 32.

L'extrémité supérieure du tube 32 est fermée par une rondelle isolante 35. A l'intérieur du tube 32, est disposée une tige 37, par exemple en laiton de haute résistance, qui par sa partie supérieure traverse la rondelle 35 et supporte un manchon de contact 53, de préférence vissé et en cuivre.The upper end of the tube 32 is closed by an insulating washer 35. Inside the tube 32, is arranged a rod 37, for example of high resistance brass, which by its upper part passes through the washer 35 and supports a sleeve contact 53, preferably screwed and copper.

La partie inférieure de la tige 37 est de diamètre supérieur à celui de la partie centrale de la tige 37 et présente un alésage fileté 37B percé à son extrémité inférieure. A proximité de l'extrémité inférieure de la partie 37A, un épaulement 37C sert d'appui à une bague 38, à profil extérieur conique, réalisée de préférence en polytétrafluoroéthylène, et munie d'une bague torique 39. La bague conique 38 est maintenue en place par la tête d'un boulon 40, vissé dans l'alésage 37B avec interposition de joints 41 et 42. La tête du boulon 40 est connectée électriquement au tube 32 par au moins un doigt de contact 43. Un ressort métallique 34 est disposé entre l'épaulement 37C et la rondelle 35.The lower part of the rod 37 has a diameter greater than that of the central part of the rod 37 and has a threaded bore 37B drilled at its lower end. Near the lower end of the part 37A, a shoulder 37C serves to support a ring 38, with a conical external profile, preferably made of polytetrafluoroethylene, and provided with an O-ring 39. The conical ring 38 is held in place by the head of a bolt 40, screwed into the bore 37B with interposition of seals 41 and 42. The head of the bolt 40 is electrically connected to the tube 32 by at least one contact finger 43. A metal spring 34 is disposed between the shoulder 37C and the washer 35.

Le tube 32 présente un épaulement intérieur conique destiné à recevoir en butée la bague conique 38.The tube 32 has a conical inner shoulder intended to receive the conical ring 38 in abutment.

A l'extrémité inférieure de la pile de varistances 26 logée dans le tube isolant 27 est montée une pièce de fermeture 52 métallique retenant les varistances 26 et pourvue d'un tube 50 terminé par des doigts de contact 51 destinés à coopérer avec le manchon 53.At the lower end of the stack of varistors 26 housed in the insulating tube 27 is mounted a metal closure part 52 retaining the varistors 26 and provided with a tube 50 terminated by contact fingers 51 intended to cooperate with the sleeve 53 .

Le fonctionnement de cet interrupteur de déclenchement est le suivant:

  • en position fermée (figure 2), le manchon de contact 53 est en contact avec les doigts 51, la varistance est insérée et le ressort 34 est détendu;
  • à l'ouverture de l'interrupteur 30, le tube 32 est tiré vers le bas par le flexible 123, comprimant le ressort 34; en raison de leur inertie, la tige 37 et le manchon 53 restent immobiles, de sorte que la varistance reste insérée grâce à cet agencement que l'on peut qualifier de retardateur; lorsque le ressort 34 arrive en fin de compression, la tige 37 est entraînée vers le bas sans à-coup grâce à l'épaulement conique du tube 32 coopérant avec la bague conique 38 et sa bague torique 39; le manchon 53 et les doigts 51 se séparent et la varistance 26 est désinsérée.
The operation of this trip switch is as follows:
  • in the closed position (Figure 2), the contact sleeve 53 is in contact with the fingers 51, the varistor is inserted and the spring 34 is relaxed;
  • at the opening of the switch 30, the tube 32 is pulled down by the hose 123, compressing the spring 34; due to their inertia, the rod 37 and the sleeve 53 remain stationary, so that the varistor remains inserted by virtue of this arrangement which can be described as retarder; when the spring 34 arrives at the end of compression, the rod 37 is driven smoothly downward thanks to the conical shoulder of the tube 32 cooperating with the conical ring 38 and its O-ring 39; the sleeve 53 and the fingers 51 separate and the varistor 26 is deactivated.

Le réglage du temps d'insertion et de désinsertion de la varistance 26 se fait par le dimensionnement de l'interrupteur 30. En particulier, un paramètre est déterminant, à savoir la longueur de la tige 37 sous le manchon 53 faisant saillie de la rondelle 35, lorsque le ressort 34 est en fin de compression, et correspondant à la longueur du déplacement du tube 32 avant entraînement de la tige 37 à l'ouverture.The setting of the insertion and deactivation time of the varistor 26 is done by the dimensioning of the switch 30. In particular, a parameter is decisive, namely the length of the rod 37 under the sleeve 53 projecting from the washer 35, when the spring 34 is at the end of compression, and corresponding to the length of the displacement of the tube 32 before driving the rod 37 at the opening.

La figure 3 est une vue schématique d'une phase d'un disjoncteur UHT multicoupure à SF6, plus précisément de 1150 kV comportant quatre chambres. Pour une tension de 1500kV, il comprendrait cinq chambres en série. La disposition est verticale en chandelle avec une chambre par colonne support, ce qui facilite la tenue mécanique des chambres.FIG. 3 is a diagrammatic view of a phase of a UHT multi-breaker circuit breaker with SF6, more precisely of 1150 kV comprising four chambers. For a voltage of 1500kV, it would include five chambers in series. The vertical arrangement is by candlelight with one chamber per support column, which facilitates the mechanical strength of the chambers.

Les chambres sont telles que décrites ci-dessus, avec leur chambre principale 1 contenant l'agencement de résistances de fermeture 6, les contacts de coupure 7 et l'interrupteur d'insertion 8 des résistances 6, dit interrupteur d'enclenchement, et leur chambre auxiliaire 2 contenant la varistance d'ouverture 26 et l'interrupteur de déclenchement 30 à mécanisme de retardement. Aux bornes de ces chambres, sont montés de façon classique des condensateurs de répartition 4.The chambers are as described above, with their main chamber 1 containing the arrangement of closing resistors 6, the cut-off contacts 7 and the insertion switch 8 of the resistors 6, called the switching switch, and their auxiliary chamber 2 containing the opening varistor 26 and the trip switch 30 with delay mechanism. At the terminals of these chambers, distribution capacitors 4 are conventionally mounted.

Le fonctionnement d'un tel disjoncteur est le suivant:

  • à la fermeture,
    l'interrupteur d'enclenchement 8 est fermé en premier lieu et insère la première résistance de fermeture dans le circuit environ 10ms avant l'entrée en contact des contacts d'arc de la chambre principale; environ 5ms avant l'entrée en contact des ces contacts d'arc, on insère la seconde résistance de fermeture et en même temps l'interrupteur de déclenchement 30 se referme mettant la varistance 26 dans le circuit; la fermeture des contacts d'arc court-circuite ensuite à la fois les résistances de fermeture 6 et la varistance d'ouverture 26.
  • à l'ouverture,
    grâce au mécanisme retardateur de l'interrupteur 8, les résistances de fermeture 6 ne sont pas insérées dans le circuit à la séparation des contacts d'arc; les contacts permanents se séparent en premier lieu puis c'est le tour des contacts d'arc; environ 10ms après la séparation des contacts d'arc de la chambre principale 1, les contacts de l'interrupteur de déclenchement 30 se séparent pour couper le courant résiduel traversant la varistance 26.
The operation of such a circuit breaker is as follows:
  • at closing,
    the interlock switch 8 is closed first and inserts the first closing resistor in the circuit approximately 10 ms before the arcing contacts of the main chamber come into contact; about 5 ms before these arcing contacts come into contact, the second closing resistor is inserted and at the same time the trip switch 30 closes putting the varistor 26 in the circuit; the closing of the arcing contacts then short-circuits both the closing resistors 6 and the opening varistor 26.
  • at the opening,
    thanks to the delay mechanism of the switch 8, the closing resistors 6 are not inserted in the circuit at the separation of the arcing contacts; the permanent contacts separate first then it is the turn of the arcing contacts; approximately 10 ms after the separation of the arcing contacts of the main chamber 1, the contacts of the tripping switch 30 separate to cut the residual current passing through the varistor 26.

Claims (5)

  1. An ultra-high-tension interrupting chamber comprising a main chamber (1) including an insulating case containing permanent contacts and arcing contacts, and an auxiliary chamber (2) connected in parallel with the main chamber (1) which auxiliary chamber includes an insulating casing (20) containing an opening varistor (26) associated with a break switch (30) having a slow-release opening mechanism,
    said interrupting chamber being characterized in that:
    the main chamber (1) includes two closing resistors (6) inserted by means of a semi-moving "make switch" device (8) putting a "first" one of the resistors into operation before the "second" resistor;
    the slow-release opening mechanism of the break switch (30) operates by inertia and is situated inside the casing (20) of the auxiliary chamber (2); and
    the switch (30) comprises a fixed metal support tube (31) in which another metal tube (32) is mounted to slide longitudinally, which other metal tube is electrically connected to the support tube (31) and is connected via its bottom end to the end of an actuating member (123), with an insulating washer (35) closing the top end of said other tube (32) and a metal rod (37) passing through said top end, which metal rod is electrically connected to said other tube (32), and the top portion of the metal rod supports a contact sleeve (53) that co-operates with contact fingers (51) mounted at the bottom end of the varistor (26), the bottom portion of the rod (37) being provided with a conical abutment (38) designed to co-operate with a complementary conical shoulder inside said other tube (32), a spring (34) being disposed inside said other tube (32) and around the rod (37) between the top end of the tube (32) and the bottom end of the rod (37), the spring (34) being slack when the switch (30) is at rest in the engaged position or in the disengaged position.
  2. An interrupting chamber according to claim 1, characterized in that the actuating member is a flexible metal cable (123) connected directly to the drive rod (121) of the main chamber (1).
  3. An interrupting chamber according to any preceding claim, characterized in that the varistor (26) is constituted by a stack of varistors in the form of cylindrical pellets disposed inside an insulating tube (27).
  4. An interrupting chamber according to claim 1, characterized in that the abutment (38) secured to the bottom portion of the rod (37) is made of polytetrafluoroethylene.
  5. An SF6 multi-interruption ultra-high-tension circuit-breaker, including both main (1) and auxiliary (2) interrupting chambers which are connected together in series, which are disposed vertically in columns, and which are equipped with distribution capacitors (4), with one main interrupting chamber (1) per support column (3), said circuit-breaker being characterized in that the interrupting chambers are interrupting chambers according to any preceding claim.
EP92402665A 1991-10-02 1992-09-29 Ultra-high voltage circuit breaker Expired - Lifetime EP0536039B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9112118 1991-10-02
FR9112118A FR2682219B1 (en) 1991-10-02 1991-10-02 ULTRA HIGH VOLTAGE CIRCUIT BREAKER.

Publications (2)

Publication Number Publication Date
EP0536039A1 EP0536039A1 (en) 1993-04-07
EP0536039B1 true EP0536039B1 (en) 1996-12-27

Family

ID=9417507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92402665A Expired - Lifetime EP0536039B1 (en) 1991-10-02 1992-09-29 Ultra-high voltage circuit breaker

Country Status (9)

Country Link
US (1) US5304760A (en)
EP (1) EP0536039B1 (en)
JP (1) JPH05234469A (en)
AT (1) ATE146896T1 (en)
BR (1) BR9203847A (en)
CA (1) CA2079555C (en)
DE (1) DE69216195T2 (en)
ES (1) ES2095435T3 (en)
FR (1) FR2682219B1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3437633B2 (en) * 1994-03-31 2003-08-18 株式会社日立製作所 Circuit breaker with parallel resistance
FR2744283B1 (en) * 1996-01-31 1998-02-27 Gec Alsthom T & D Sa HIGH VOLTAGE CIRCUIT BREAKER WITH RESISTANCE INSERTED AT CLOSING
FR2765388B1 (en) * 1997-06-26 2003-02-28 Gec Alsthom T & D Sa CIRCUIT BREAKER WITH INSERTION RESISTOR FORMED FROM TWO COAXIAL STACKS
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
KR101415065B1 (en) * 2010-11-17 2014-07-04 엘에스산전 주식회사 Contact apparatus for circuit breaker
CN105957778B (en) * 2016-06-01 2018-02-23 中国西电电气股份有限公司 A kind of attachment structure of SF6 breaker closings resistance and arc-chutes
CN106449262A (en) * 2016-10-24 2017-02-22 上海电力学院 Method for putting closing resistor into ultra-high voltage tank-type circuit breaker
DE102018205910A1 (en) * 2018-04-18 2019-10-24 Siemens Aktiengesellschaft High-voltage circuit breaker with Einschaltwiderstandsanordnung and coupling device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS531470B2 (en) * 1971-08-10 1978-01-19
JPS4830058A (en) * 1971-08-24 1973-04-20
JPS5416131A (en) * 1977-07-07 1979-02-06 Sumitomo Electric Ind Ltd Character read system
FR2503448B1 (en) * 1981-03-31 1986-04-18 Alsthom Atlantique COMPRESSED GAS CIRCUIT BREAKER
CA1171444A (en) * 1980-07-23 1984-07-24 Marcel Besson Compressed gas circuit breaker
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
FR2654251A1 (en) * 1989-11-03 1991-05-10 Alsthom Gec CIRCUIT BREAKER OF OVERVOLTAGES.
FR2655188B1 (en) * 1989-11-29 1992-02-07 Alsthom Gec HIGH VOLTAGE CIRCUIT BREAKER AT VARISTANCES.
FR2662848B2 (en) * 1990-02-27 1994-07-01 Alsthom Gec CIRCUIT BREAKER WITH VARISTANCE ASSISTED BREAKAGE.
FR2663456B1 (en) * 1990-06-14 1996-04-26 Alsthom Gec CIRCUIT BREAKER WITH INCORPORATED VARISTANCE.

Also Published As

Publication number Publication date
CA2079555A1 (en) 1993-04-03
ES2095435T3 (en) 1997-02-16
EP0536039A1 (en) 1993-04-07
DE69216195D1 (en) 1997-02-06
DE69216195T2 (en) 1997-04-17
JPH05234469A (en) 1993-09-10
ATE146896T1 (en) 1997-01-15
US5304760A (en) 1994-04-19
FR2682219A1 (en) 1993-04-09
BR9203847A (en) 1993-04-27
FR2682219B1 (en) 1997-01-31
CA2079555C (en) 1996-12-24

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