EP0620578A1 - Insertion device for circuit breaker - Google Patents

Insertion device for circuit breaker Download PDF

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Publication number
EP0620578A1
EP0620578A1 EP94400762A EP94400762A EP0620578A1 EP 0620578 A1 EP0620578 A1 EP 0620578A1 EP 94400762 A EP94400762 A EP 94400762A EP 94400762 A EP94400762 A EP 94400762A EP 0620578 A1 EP0620578 A1 EP 0620578A1
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EP
European Patent Office
Prior art keywords
circuit breaker
contact
contacts
insertion contact
speed
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.)
Withdrawn
Application number
EP94400762A
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German (de)
French (fr)
Inventor
Michel Perret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Grid Solutions SAS
Original Assignee
GEC Alsthom T&D SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by GEC Alsthom T&D SA filed Critical GEC Alsthom T&D SA
Publication of EP0620578A1 publication Critical patent/EP0620578A1/en
Withdrawn legal-status Critical Current

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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
    • H01H33/167—Impedances connected with contacts the impedance being inserted only while opening the switch

Definitions

  • the present invention relates to a device for the electrical insertion, in parallel on the contacts of a circuit breaker, and for a determined period after the opening of these contacts, of a component such as a resistor or a varistor.
  • An object of the present invention is to provide a simple device, compact, which can be easily mounted on already existing circuit breaker mechanisms
  • Another object of the invention is to provide a relatively light device which does not require significantly increased circuit breaker operating energy.
  • Another object of the invention is to provide a smooth operating device, smoothly, requiring no particular damping element.
  • the subject of the present invention is a device for the electrical insertion, in parallel on the contacts of a circuit breaker, and for a determined period after the opening of these contacts, of a component such as a resistor or a varistor, by means of a first fixed insertion contact electrically connected to said component and to a first circuit-breaker socket, and of a second insertion contact electrically connected to a second circuit-breaker socket, characterized in that it includes means so that during an opening operation, the second insertion contact progressively passes from zero speed to the speed of movement reached by the mobile assembly of the circuit breaker.
  • the second insertion contact is linked to a driven moving part, by means of a spring working at the compression, by a mechanical member secured to the mobile assembly of the circuit breaker.
  • said movable part is a tubular part coaxial with the axis of revolution of the circuit breaker, said mechanical member being a ring, said spring resting between said ring and a bottom of said tubular part.
  • the reference 1 designates a metal cylinder, of axis xx, forming part of the mobile assembly of the circuit breaker and delimiting, with a metal tube 1A, a blowing cylinder.
  • the cylinder 1A is connected to an insulating tube 1B, itself connected to an operating rod not shown.
  • the cylinders 1 and 1A are joined by an annular part 2 provided with an opening 2A and carrying a movable main contact 3, a movable arcing contact 4 and a blowing nozzle 5.
  • the fixed assembly includes a fixed main contact 7 and a fixed arcing contact 8, connected to a second outlet (not shown) of the circuit breaker.
  • the fixed assembly also includes a blowing piston 9 provided with a rod 9A connected to a fixed block 9B and provided with electrical contacts 9C, preferably of the accordion type, cooperating with the cylinder 1 for the passage of current.
  • Block 9B is connected, by contacts not shown, to an outlet on the circuit breaker.
  • the piston is provided with a one-way valve 10, letting the gas pass only if the pressure in the blowing cylinder is lower than the pressure outside of it.
  • the fixed assembly also includes a first insertion contact 11, connected to a component (not shown) such as a resistor or a varistor (not shown), themselves connected to the second socket.
  • a component such as a resistor or a varistor (not shown)
  • the movable insertion contact 12 is arranged in the extension of a tubular part 13 sliding coaxially outside the cylinder 1, by virtue of circular bearings 14 and 15 serving as funds for the tubular part.
  • a ring 16, integral with the cylinder 1, serves to support a first end of a spring 17 working under compression and disposed coaxially with the cylinder 1; the second end of the spring bears against the bottom 15.
  • the ring 16 is provided with a stop 18 cooperating with a damping coating 19 of the bearing surface 14 to absorb any impact between the ring 16 and the bearing surface 14.
  • the mobile assembly 1 After a stroke of 110 mm (FIG. 2), ie for example a time of 18 ms from the start of the opening maneuver, the mobile assembly 1 has already reached its maneuvering speed, ie 9 m / s.
  • the invention finds application in high voltage circuit breakers.

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  • Circuit Breakers (AREA)

Abstract

Device for electrical insertion, in parallel with contacts of a circuit breaker, and for a defined duration after the opening of these contacts, of a component such as a resistor or a varistor, by means of a first fixed insertion contact electrically linked to the said component and to a first current socket of the circuit breaker, and of a second insertion contact, electrically connected to a second current socket of the circuit breaker, characterised in that it comprises means (16, 17) such that, in the course of an opening manoeuvre, the second insertion contact (12) passes progressively from a zero speed to the speed of movement reached by the movable assembly of the circuit breaker. <IMAGE>

Description

La présente invention concerne un dispositif pour l'insertion électrique, en parallèle sur les contacts d'un disjoncteur, et pendant une durée déterminée après l'ouverture de ces contacts, d'un composant tel qu'une résistance ou une varistance.The present invention relates to a device for the electrical insertion, in parallel on the contacts of a circuit breaker, and for a determined period after the opening of these contacts, of a component such as a resistor or a varistor.

On sait que de tels composant sont utilisés en haute tension pour limiter les surtensions à l'ouverture du disjoncteur.We know that such components are used at high voltage to limit overvoltages when the circuit breaker opens.

Un but de la présente invention est de réaliser un dispositif simple, de faible encombrement, pouvant être aisément monté sur des mécanismes de disjoncteur déjà existantsAn object of the present invention is to provide a simple device, compact, which can be easily mounted on already existing circuit breaker mechanisms

Un autre but de l'invention est de réaliser un dispositif relativement léger qui ne nécessite pas une énergie de manoeuvre du disjoncteur notablement accrue.Another object of the invention is to provide a relatively light device which does not require significantly increased circuit breaker operating energy.

Un autre but de l'invention est de réaliser un dispositif de fonctionnement doux, sans à-coup, ne nécessitant aucun élément d'amortissement particulier.Another object of the invention is to provide a smooth operating device, smoothly, requiring no particular damping element.

La présente invention a pour objet un dispositif pour l'insertion électrique, en parallèle sur les contacts d'un disjoncteur, et pendant une durée déterminée après l'ouverture de ces contacts, d'un composant tel qu'une résistance ou une varistance, au moyen d'un premier contact d'insertion fixe électriquement relié audit composant et à une première prise de courant du disjoncteur, et d'un second contact d'insertion électriquement connecté à une seconde prise de courant du disjoncteur, caractérisé en ce qu'il comprend des moyens pour qu'au cours d'une manoeuvre d'ouverture, le second contact d'insertion passe progressivement d'une vitesse nulle à la vitesse de déplacement atteinte par l'ensemble mobile du disjoncteur.The subject of the present invention is a device for the electrical insertion, in parallel on the contacts of a circuit breaker, and for a determined period after the opening of these contacts, of a component such as a resistor or a varistor, by means of a first fixed insertion contact electrically connected to said component and to a first circuit-breaker socket, and of a second insertion contact electrically connected to a second circuit-breaker socket, characterized in that it includes means so that during an opening operation, the second insertion contact progressively passes from zero speed to the speed of movement reached by the mobile assembly of the circuit breaker.

Dans un mode particulier de réalisation, le second contact d'insertion est lié à une pièce mobile entraînée, par l'intermédiaire d'un ressort travaillant à la compression, par un organe mécanique solidaire de l'ensemble mobile du disjoncteur.In a particular embodiment, the second insertion contact is linked to a driven moving part, by means of a spring working at the compression, by a mechanical member secured to the mobile assembly of the circuit breaker.

Avantageusement, ladite pièce mobile est une pièce tubulaire coaxiale à l'axe de révolution du disjoncteur, ledit organe mécanique étant une bague, ledit ressort s'appuyant entre ladite bague et un fond de ladite pièce tubulaire.Advantageously, said movable part is a tubular part coaxial with the axis of revolution of the circuit breaker, said mechanical member being a ring, said spring resting between said ring and a bottom of said tubular part.

L'invention sera bien comprise à la lecture de la description donnée ci-après d'un exemple de réalisation de l'invention, en référence au dessin annexé, dans lequel:

  • la figure 1 est une vue en demi-coupe axiale des éléments principaux d'un disjoncteur représenté en position enclenchée,
  • la figure 2 est une vue analogue au début d'une phase d'ouverture,
  • la figure 3 est une vue analogue au moment où les contacts d'insertion vont se séparer,
  • la figure 4 est une vue analogue après séparation des contacts d'insertion.
The invention will be clearly understood on reading the description given below of an exemplary embodiment of the invention, with reference to the appended drawing, in which:
  • FIG. 1 is a view in axial half-section of the main elements of a circuit breaker shown in the engaged position,
  • FIG. 2 is a similar view at the start of an opening phase,
  • FIG. 3 is a similar view when the insertion contacts are going to separate,
  • Figure 4 is a similar view after separation of the insertion contacts.

Dans les figures, la référence 1 désigne un cylindre métallique, d'axe xx, faisant partie de l'ensemble mobile du disjoncteur et délimitant, avec un tube métallique 1A, un cylindre de soufflage. Le cylindre 1A est relié à un tube isolant 1B, lui-même relié à une tringle de manoeuvre non représentée. Les cylindres 1 et 1A sont solidarisés par une partie annulaire 2 munie d'une ouverture 2A et portant un contact principal mobile 3, un contact d'arc mobile 4 et une buse de soufflage 5.In the figures, the reference 1 designates a metal cylinder, of axis xx, forming part of the mobile assembly of the circuit breaker and delimiting, with a metal tube 1A, a blowing cylinder. The cylinder 1A is connected to an insulating tube 1B, itself connected to an operating rod not shown. The cylinders 1 and 1A are joined by an annular part 2 provided with an opening 2A and carrying a movable main contact 3, a movable arcing contact 4 and a blowing nozzle 5.

L'ensemble fixe comprend un contact principal fixe 7 et un contact d'arc fixe 8, reliés à une seconde prise non représentée du disjoncteur. L'ensemble fixe comporte aussi un piston de soufflage 9 muni d'une tige 9A reliée à un bloc fixe 9B et munie de contacts électriques 9C, préférentiellement de type accordeon, coopérant avec le cylindre 1 pour le passage du courant. Le bloc 9B est relié, par des contacts non représentés, à une prise de courant du disjoncteur. Le piston est muni d'une soupape unidirectionnelle 10, ne laissant passer le gaz que si la pression dans le cylindre de soufflage est inférieure à la pression à l'extérieur de celui-ci.The fixed assembly includes a fixed main contact 7 and a fixed arcing contact 8, connected to a second outlet (not shown) of the circuit breaker. The fixed assembly also includes a blowing piston 9 provided with a rod 9A connected to a fixed block 9B and provided with electrical contacts 9C, preferably of the accordion type, cooperating with the cylinder 1 for the passage of current. Block 9B is connected, by contacts not shown, to an outlet on the circuit breaker. The piston is provided with a one-way valve 10, letting the gas pass only if the pressure in the blowing cylinder is lower than the pressure outside of it.

L'ensemble fixe comprend également un premier contact d'insertion 11, relié à un composant non représenté tel qu'une résistance ou une varistance non représentées , elles-mêmes reliées à la seconde prise de courant.The fixed assembly also includes a first insertion contact 11, connected to a component (not shown) such as a resistor or a varistor (not shown), themselves connected to the second socket.

L'idée fondamentale de l'invention est de réaliser un dispositif d'insertion, du type à inertie, comprenant le contact d'insertion fixe précité et un contact d'insertion mobile qui, au cours d'une manoeuvre d'ouverture du disjoncteur, passe progressivement de la vitesse nulle à la vitesse de déplacement de l'ensemble mobile. De la sorte deux objectifs sont atteints:

  • 1. Le composant est inséré en parallèle sur les contacts du disjoncteur pendant le temps requis,
  • 2. En fin de manoeuvre d'ouverture du disjoncteur, le contact d'insertion mobile qui a la même vitesse que l'ensemble mobile ne provoque aucun choc sur ses butées.
The basic idea of the invention is to produce an insertion device, of the inertia type, comprising the aforementioned fixed insertion contact and a movable insertion contact which, during an opening operation of the circuit breaker , progressively changes from zero speed to the speed of movement of the mobile assembly. In this way two objectives are achieved:
  • 1. The component is inserted in parallel on the contacts of the circuit breaker for the required time,
  • 2. At the end of the circuit-breaker opening operation, the mobile insertion contact which has the same speed as the mobile assembly does not cause any impact on its stops.

Pour atteindre ces objectifs, le contact d'insertion mobile 12 est disposé dans le prolongement d'une pièce tubulaire 13 coulissant coaxialement à l'extérieur du cylindre 1, grâce à des portées circulaires 14 et 15 servant de fonds à la pièce tubulaire. Une bague 16, solidaire du cylindre 1, sert d'appui à une première extrémité d'un ressort 17 travaillant à la compression et disposé coaxialament au cylindre 1 ; la seconde extrémité du ressort s'appuie contre le fond 15. La bague 16 est munie d'une butée 18 coopérant avec un revêtement amortisseur 19 de la portée 14 pour amortir tout choc entre la bague 16 et la portée 14.To achieve these objectives, the movable insertion contact 12 is arranged in the extension of a tubular part 13 sliding coaxially outside the cylinder 1, by virtue of circular bearings 14 and 15 serving as funds for the tubular part. A ring 16, integral with the cylinder 1, serves to support a first end of a spring 17 working under compression and disposed coaxially with the cylinder 1; the second end of the spring bears against the bottom 15. The ring 16 is provided with a stop 18 cooperating with a damping coating 19 of the bearing surface 14 to absorb any impact between the ring 16 and the bearing surface 14.

Le fonctionnement est le suivant:

  • lorsque le disjoncteur est en position enclenchée, (figure 1), le contact électrique est établi entre les contacts principaux 3 et 7, entre les contacts d'arc 4 et 8, et entre les contacts d'insertion 11 et 12. La bague 16 est en butée contre la portée 14 et le ressort 17 est détendu.
  • après la séparation des contacts, (figure 2) le contact électrique est toujours assuré entre les contacts d'insertion dont la zone de recouvrement a été calculée pour cela. Grâce à la bague 16 et au ressort 17, le contact d'insertion et son tube 13 sont mis progressivement en vitesse, malgré leur inertie. Sans le ressort et la bague, les éléments 12 et 13 resteraient immobiles.
The operation is as follows:
  • when the circuit breaker is in the on position (FIG. 1), the electrical contact is established between the main contacts 3 and 7, between the arcing contacts 4 and 8, and between the insertion contacts 11 and 12. The ring 16 is in abutment against the bearing surface 14 and the spring 17 is relaxed.
  • after the separation of the contacts, (figure 2) the electrical contact is always ensured between the insertion contacts, the overlap area of which has been calculated for this. Thanks to the ring 16 and the spring 17, the insertion contact and its tube 13 are gradually put into speed, despite their inertia. Without the spring and the ring, the elements 12 and 13 would remain stationary.

A titre d'exemple, on suppose une course totale de l'ensemble mobile de 200 mm et une vitesse de déplacement de l'ensemble mobile de 9 m/s rapidement établie.For example, we assume a total travel of the mobile assembly of 200 mm and a speed of movement of the mobile assembly of 9 m / s quickly established.

Après une course de 110 mm (figure 2), soit par exemple un temps de 18 ms à compter du début de la manoeuvre d'ouverture, l'ensemble mobile 1 a déjà atteint sa vitesse de manoeuvre, soit 9 m/s.After a stroke of 110 mm (FIG. 2), ie for example a time of 18 ms from the start of the opening maneuver, the mobile assembly 1 has already reached its maneuvering speed, ie 9 m / s.

Le contact d'insertion n'a atteint que la vitesse de 3 m/s.

  • au moment où le contact d'insertion 12 va quitter le contact 11, (figure 3) par exemple au temps t = 20 ms, la course de l'ensemble mobile 1 est de 170 mm et la vitesse du contact 12 passe à 6 m/s, ce qui est la vitesse du contact 1 car celui-ci a commencé à ralentir. Le ressort se comprime en effet progressivement de sorte que le contact d'insertion 12 accélère.
  • en fin de manoeuvre d'ouverture (figure 4) la vitesse du contact d'insertion atteint celle de l'ensemble mobile, le ressort 17 est totalement comprimé, de sorte qu'il n'y a aucun choc entre entre les pièces d'insertion et la bague 16. Puis le ressort 17 amène en contact la bague 16 et la portée 14 par l'intermédiaire de l'amortisseur 19.
The insertion contact only reached the speed of 3 m / s.
  • at the moment when the insertion contact 12 leaves contact 11, (FIG. 3) for example at time t = 20 ms, the stroke of the mobile assembly 1 is 170 mm and the speed of contact 12 changes to 6 m / s, which is the speed of contact 1 because it started to slow down. The spring is in fact progressively compressed so that the insertion contact 12 accelerates.
  • at the end of the opening operation (FIG. 4) the speed of the insertion contact reaches that of the mobile assembly, the spring 17 is fully compressed, so that there is no impact between the pieces of insertion and the ring 16. Then the spring 17 brings the ring 16 and the bearing 14 into contact via the damper 19.

A la fermeture du disjoncteur, en fin de manoeuvre, par inertie, le contact 12 va continuer sa course en comprimant le ressort 17. Puis le ressort 17 va ramener le contact 12 en position de départ.When the circuit breaker closes, at the end of the maneuver, by inertia, the contact 12 will continue its stroke by compressing the spring 17. Then the spring 17 will bring the contact 12 back to the starting position.

On notera que, dans l'exemple décrit, le courant inséré passe à travers le ressort 17.It will be noted that, in the example described, the inserted current passes through the spring 17.

L'invention trouve application dans les disjoncteurs à haute tension.The invention finds application in high voltage circuit breakers.

Claims (3)

1/ Dispositif pour l'insertion électrique, en parallèle sur les contacts d'un disjoncteur, et pendant une durée déterminée après l'ouverture de ces contacts, d'un composant tel qu'une résistance ou une varistance, au moyen d'un premier contact d'insertion fixe électriquement relié audit composant et à une première prise de courant du disjoncteur, et d'un second contact d'insertion électriquement connecté à une seconde prise de courant du disjoncteur, caractérisé en ce qu'il comprend des moyens (16, 17) pour qu'au cours d'une manoeuvre d'ouverture, le second contact d'insertion (12) passe progressivement d'une vitesse nulle à la vitesse de déplacement atteinte par l'ensemble mobile du disjoncteur. 1 / Device for electrical insertion, in parallel on the contacts of a circuit breaker, and for a determined period after the opening of these contacts, of a component such as a resistor or a varistor, by means of a first fixed insertion contact electrically connected to said component and to a first circuit breaker socket, and a second insertion contact electrically connected to a second circuit breaker socket, characterized in that it comprises means ( 16, 17) so that, during an opening operation, the second insertion contact (12) progressively passes from zero speed to the speed of movement reached by the mobile assembly of the circuit breaker. 2/ Dispositif selon la revendication 1, caractérisé en ce que le second contact d'insertion (12) est lié à une pièce mobile (13) entraînée, par l'intermédiaire d'un ressort (17) travaillant à la compression, par un organe mécanique (16) solidaire de l'ensemble mobile du disjoncteur. 2 / Device according to claim 1, characterized in that the second insertion contact (12) is linked to a movable part (13) driven, by means of a spring (17) working in compression, by a mechanical member (16) integral with the mobile assembly of the circuit breaker. 3/ Dispositif selon la revendication 2, caractérisé en ce que ladite pièce mobile est une pièce tubulaire (13) coaxiale à l'axe de révolution du disjoncteur, ledit organe mécanique étant une bague (16), ledit ressort (17) s'appuyant entre ladite bague (16) et un fond (15) de ladite pièce tubulaire (13). 3 / Device according to claim 2, characterized in that said movable part is a tubular part (13) coaxial with the axis of revolution of the circuit breaker, said mechanical member being a ring (16), said spring (17) bearing between said ring (16) and a bottom (15) of said tubular part (13).
EP94400762A 1993-04-13 1994-04-07 Insertion device for circuit breaker Withdrawn EP0620578A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9304319A FR2704088B1 (en) 1993-04-13 1993-04-13 Insertion device for circuit breaker.
FR9304319 1993-04-13

Publications (1)

Publication Number Publication Date
EP0620578A1 true EP0620578A1 (en) 1994-10-19

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EP94400762A Withdrawn EP0620578A1 (en) 1993-04-13 1994-04-07 Insertion device for circuit breaker

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EP (1) EP0620578A1 (en)
CA (1) CA2121019A1 (en)
FR (1) FR2704088B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450501A1 (en) * 1979-03-02 1980-09-26 Alsthom Cgee CLOSING RESISTANCE INSERTION DEVICE OF A SWITCHING APPARATUS
DE3411445A1 (en) * 1984-02-06 1985-08-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau HIGH VOLTAGE SWITCH
EP0482555A1 (en) * 1990-10-24 1992-04-29 Gec Alsthom Sa SF6 circuit breaker with built-in condensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2450501A1 (en) * 1979-03-02 1980-09-26 Alsthom Cgee CLOSING RESISTANCE INSERTION DEVICE OF A SWITCHING APPARATUS
DE3411445A1 (en) * 1984-02-06 1985-08-08 BBC Aktiengesellschaft Brown, Boveri & Cie., Baden, Aargau HIGH VOLTAGE SWITCH
EP0482555A1 (en) * 1990-10-24 1992-04-29 Gec Alsthom Sa SF6 circuit breaker with built-in condensor

Also Published As

Publication number Publication date
CA2121019A1 (en) 1994-10-14
FR2704088B1 (en) 1995-05-19
FR2704088A1 (en) 1994-10-21

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