EP0704872B1 - Middle voltage interruptor or circuit breaker - Google Patents

Middle voltage interruptor or circuit breaker Download PDF

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Publication number
EP0704872B1
EP0704872B1 EP19950410095 EP95410095A EP0704872B1 EP 0704872 B1 EP0704872 B1 EP 0704872B1 EP 19950410095 EP19950410095 EP 19950410095 EP 95410095 A EP95410095 A EP 95410095A EP 0704872 B1 EP0704872 B1 EP 0704872B1
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EP
European Patent Office
Prior art keywords
driver
switch according
spring
arcing
contact
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP19950410095
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German (de)
French (fr)
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EP0704872A1 (en
Inventor
Denis Schneider Electric Perrin
Reynald Schneider Electric Marin-Pache
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Schneider Electric Industries SAS
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Schneider Electric Industries SAS
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Publication of EP0704872A1 publication Critical patent/EP0704872A1/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
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements

Definitions

  • the present invention relates to a medium voltage switch or circuit breaker comprising an arc extinguishing chamber formed by a cylinder closed by two bottoms, said chamber containing a fixed arcing contact secured to one of the aforementioned funds and electrically connected to a first current supply conductor, and a movable arcing contact mounted at longitudinal sliding across the other of the two bottoms and electrically connected to a second current supply conductor.
  • the aforementioned movable arcing contact is moved to translation by a control mechanism ensuring the closing and separation of arcing contacts, the pressure of said contacts in the closed position being maintained by a pressure spring acting on the movable contact and whose force corresponds substantially to the electrodynamic forces of repulsion of the arcing contacts generated by current flow.
  • Japanese patent application No. 190063/1993 describes several embodiments of a circuit breaker, one of which has the characteristics mentioned above.
  • the pressure spring is mounted in compression between a part intermediate acting on the movable contact and a plate connected to a control rod articulated on the circuit breaker support.
  • circuit breaker described in patent document FR 2 677 168 (closest state of the art) of the plaintiff, comprising two main contacts shunted by two butted arcing contacts in the closed position.
  • the movable contact is controlled by a mechanism comprising on the one hand, a toggle formed by a crank and a connecting rod to said contact mobile, and on the other hand a precompressed pressure spring between the crank and a pin belonging to the connecting rod and sliding in a light provided in said crank, said spring being active when the toggle is near the point dead.
  • circuit breakers of the kind previously mentioned have certain disadvantages.
  • One of these drawbacks is that the inertia of the moving parts, during the opening and closing operations of the arcing contacts, influences the speed of moving the moving contact.
  • Another of these drawbacks is that the maintenance of the contact force generates stresses in the parts external to the device disconnection because the mechanism for controlling the movable contact participates in maintaining the contact pressure.
  • the present invention solves these problems and proposes a switch or circuit breaker for simple and compact design, reducing the number of moving parts whose inertia influences the speed and acceleration of mobile contact, while eliminating stresses generated in parts outside the cut-off device during maintenance contact pressure.
  • the present invention relates to a medium voltage electric switch of the genre including an arc extinguishing chamber of substantially cylindrical and closed shape by two fixed bottoms, said chamber containing a fixed arcing contact secured to one of the aforementioned funds and electrically connected to a first current supply conductor and a movable arcing contact mounted to slide longitudinally through the other of the two bottoms, said movable contact being electrically connected to a second current supply conductor and being driven by a control mechanism ensuring the closing and the separation of said arcing contacts, the pressure of the contacts in the closed position being maintained by a spring acting on the movable contact,
  • this switch being characterized in that it comprises an energy storage mechanism cooperating with the aforementioned control mechanism so as to ensure, during a closing operation, the closing of the arcing contacts, then compression of the aforementioned spring, said spring in the compressed state acting on the movable contact to realize the pressure of the arcing contacts, the energy accumulated during compression of the spring being used to ensure rapid separation arcing contacts during an
  • the above-mentioned energy accumulation mechanism comprises a coach in the general form of a frame, mounted to slide in a first support fixed and housing the aforementioned chamber, said coach being in support, by its upper part, on one end of the aforementioned spring, the other end of which bears on the support aforementioned, while its lower part cooperates with a neutral passage system articulated on the one hand, to the control mechanism and on the other hand, to the movable arcing contact.
  • this mechanism further comprises a stop intended for limit the translational travel of the coach during an opening maneuver arcing contacts.
  • the neutral passage system comprises at minus a toggle joint articulated to a connecting rod of the mechanism said knee switch in the vicinity of neutral in the position of closing of the arcing contacts and cooperating by its lower part with the lower part of the coach.
  • this system comprises two knee pads situated on either side of the coach and connected by a connecting element bearing on the lower part of the coach.
  • the aforementioned kneepad (s) is (are) made up each by two connecting rods connected in an articulated manner by one of their ends between them, said connecting rods being connected in an articulated manner by their other end respectively, to the movable contact and to a guide rod, articulated on a second fixed support.
  • the toggle (s) is (are) each made up of a crank double articulated on the movable arcing contact and comprising two single cranks respectively connected in an articulated manner to the drive rod of the control and a connecting rod hingedly connected to a guide rod articulated on a second fixed support.
  • the neutral passage system comprises at least a cam connected in an articulated manner to a connecting rod for the mechanism of control and comprising an arcuate groove in which slides a lug secured to the movable contact, said cam being also hingedly connected to a connecting rod articulated guide on a second fixed support and cooperating with the lower part of the coach.
  • the first and second supports are respectively connected electrically to the first and second current supply conductors.
  • the aforementioned spring is mounted around the rod of a screw through the upper part of the coach and the first fixed support to screw into the fixed arcing contact.
  • the movable contact comes to bear on a stop formed on the coach so that the impact energy generated by the displacement of the contact mobile is absorbed by the spring.
  • This pole D comprises a chamber arc extinction 5 constituted by a cylinder closed by two bottoms 5a, 5b and containing two arcing contacts 1, 2 respectively fixed and mobile.
  • the fixed arcing contact 1 is integral with one of the aforementioned bottoms 5a and electrically connected to a first current supply conductor 20, while the movable arcing contact 2 is slidably mounted across the other of the bottoms 5b by being electrically connected to a second current supply conductor 21, and mechanically to a control C.
  • This control mechanism C comprises a drive rod (or rod 11) connected in an articulated manner to a double crank 30 connected to another connecting rod 31, which is connected to a drive shaft 32.
  • this pole D further comprises a mechanism known as energy storage A comprising a drive device, said coach 4, in general frame form, a system with passage from neutral S, and a pressure spring 3.
  • the driver 4 comprises a part upper 4a forming a lifting beam and a lower part 4b in the shape of a U, these parts being connected by two tie rods 4c, 4d mounted to slide through a support 6, said first, constituting the first supply conductor of the aforementioned current 20.
  • the lower part in U shape 4b of the coach 4 is slidably mounted through a second support 13 constituting the second current supply conductor 21.
  • the arc extinguishing chamber 5 is housed inside the coach 4 and the pressure spring 3 is supported, by one 3a of its ends, on the upper part 4a of the coach, and, by its other end 3b on the above-mentioned fixed support 6.
  • This spring is also mounted around the rod 22 with a screw 23 passing through the upper part 4a of the coach 4 and the first support 6 for screwing in the fixed arcing contact 1.
  • the system with passing through neutral S comprises on each side of the coach 4, two knee pads 7, 8 each constituted by two connecting rods 9,10 hingedly connected together, by one of their ends.
  • one of the connecting rods is a double crank 14 made up of two simple cranks 15,16, said crank being hingedly connected at a point located between its two cranks 15, 16 at the movable contact 2.
  • One 16 of the simple cranks is further connected to an intermediate rod 17, which is connected to a guide rod 12 articulated on the second fixed support 13, while the other crank 15 is connected so articulated to the control rod 11.
  • the two knee pads 7, 8 are connected by a pin or the like (not shown) bearing on the lower part 4b of the coach 4.
  • the point passing system dead S comprises, on each side of the trainer 4, a cam 18 articulated on the rod of control 11 and comprising a circular groove 18a in which slides a lug 18b secured to the movable arcing contact 2, said cam 18 being further articulated on the connecting rod guide 12 above while bearing on the lower part 4b of the coach 4.
  • circuit breaker of the invention The operation of the circuit breaker of the invention will be described below with reference to figures.
  • the pole D cut-off mechanism is in the open position stable, arcing contacts 1, 2 being open.
  • the control rod 11 moved in the direction of arrow F, which resulted in a rotation of the crank 14 (respectively of the connecting rod 9) around the X axis, counterclockwise shows, causing an upward movement of the movable contact 2, until the arcing contacts 1, 2 are closed ( Figures 3 and 6). In this position, the contact pressure is not insured.
  • the drive rod 11 is moved in the opposite direction to the previous one, which generates a rotation of the crank 14 and the connecting rod 17.
  • the energy accumulated by the spring 3 during compression turns into kinetic energy, and the drive 4 is biased upwards by the spring 3 until it comes to bear against the stop 33 formed at the upper part of the screw 23 ( Figures 2,3 and 4), position shown in Figures 3 and 6.
  • the crank 14 and the connecting rod 17 are set in speed, which causes separation at high speed of the arcing contacts 1, 2, and the abutment of the movable contact 2, on a another stop 34, formed on the coach 4, the impact energy thus being absorbed by the pressure spring 3.
  • a circuit breaker or switch has been produced in which the inertia parts linked to the maintenance of the contact pressure does not affect the speed of displacement of the movable contact, and in which the stresses due to the maintenance of the effort of contact are minimized in parts outside the circuit breaker.

Landscapes

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

Description

La présente invention concerne un interrupteur ou disjoncteur moyenne tension comportant une chambre d'extinction d'arc formée d'un cylindre obturé par deux fonds, ladite chambre renfermant un contact d'arc fixe solidaire de l'un des fonds précités et relié électriquement à un premier conducteur d'amenée du courant, et un contact d'arc mobile monté à coulissement longitudinal à travers l'autre des deux fonds et relié électriquement à un second conducteur d'amenée du courant. Le contact d'arc mobile précité est mu en translation par un mécanisme de commande assurant la fermeture et la séparation des contacts d'arc, la pression desdits contacts en position de fermeture étant maintenue grâce à un ressort de pression agissant sur le contact mobile et dont la force correspond sensiblement aux forces électrodynamiques de répulsion des contacts d'arc engendrées par le passage du courant.The present invention relates to a medium voltage switch or circuit breaker comprising an arc extinguishing chamber formed by a cylinder closed by two bottoms, said chamber containing a fixed arcing contact secured to one of the aforementioned funds and electrically connected to a first current supply conductor, and a movable arcing contact mounted at longitudinal sliding across the other of the two bottoms and electrically connected to a second current supply conductor. The aforementioned movable arcing contact is moved to translation by a control mechanism ensuring the closing and separation of arcing contacts, the pressure of said contacts in the closed position being maintained by a pressure spring acting on the movable contact and whose force corresponds substantially to the electrodynamic forces of repulsion of the arcing contacts generated by current flow.

La demande de brevet japonaise n° 190063/1993 décrit plusieurs réalisations d'un disjoncteur dont l'une comporte les caractéristiques précédemment mentionnées. Suivant cette réalisation, le ressort de pression est monté en compression entre une pièce intermédiaire agissant sur le contact mobile et une platine reliée à une bielle de commande articulée sur le support du disjoncteur.Japanese patent application No. 190063/1993 describes several embodiments of a circuit breaker, one of which has the characteristics mentioned above. next this embodiment, the pressure spring is mounted in compression between a part intermediate acting on the movable contact and a plate connected to a control rod articulated on the circuit breaker support.

On connaít également un disjoncteur, décrit dans le document de brevet FR 2 677 168 (état de la technique le plus proche) de la demanderesse, comprenant deux contacts principaux shuntés par deux contacts d'arc aboutés en position de fermeture. Le contact mobile est commandé par un mécanisme comprenant d'une part, une genouillère formée par une manivelle et une bielle de liaison audit contact mobile, et d'autre part un ressort de pression précomprimé entre la manivelle et un tourillon appartenant à la bielle de liaison et coulissant dans une lumière prévue dans ladite manivelle, ledit ressort étant actif lorsque la genouillère se trouve au voisinage du point mort.We also know a circuit breaker, described in patent document FR 2 677 168 (closest state of the art) of the plaintiff, comprising two main contacts shunted by two butted arcing contacts in the closed position. The movable contact is controlled by a mechanism comprising on the one hand, a toggle formed by a crank and a connecting rod to said contact mobile, and on the other hand a precompressed pressure spring between the crank and a pin belonging to the connecting rod and sliding in a light provided in said crank, said spring being active when the toggle is near the point dead.

Or les disjoncteurs connus du genre précédemment mentionné présentent certains inconvénients. L'un de ces inconvénients tient en ce que l'inertie des pièces en mouvement, lors des manoeuvres d'ouverture et de fermeture des contacts d'arc, influence la vitesse de déplacement du contact mobile. Un autre de ces inconvénients tient en ce que le maintien de l'effort de contact engendre des contraintes dans les pièces extérieures au dispositif de coupure car le mécanisme de commande du contact mobile participe au maintien de la pression de contact. Now known circuit breakers of the kind previously mentioned have certain disadvantages. One of these drawbacks is that the inertia of the moving parts, during the opening and closing operations of the arcing contacts, influences the speed of moving the moving contact. Another of these drawbacks is that the maintenance of the contact force generates stresses in the parts external to the device disconnection because the mechanism for controlling the movable contact participates in maintaining the contact pressure.

La présente invention résout ces problèmes et propose un interrupteur ou disjoncteur de conception simple et d'encombrement réduit, diminuant le nombre de pièces en mouvement dont l'inertie influe sur la vitesse et l'accélération du contact mobile, tout en supprimant les contraintes engendrées dans les pièces extérieures au dispositif de coupure lors du maintien de la pression de contact.The present invention solves these problems and proposes a switch or circuit breaker for simple and compact design, reducing the number of moving parts whose inertia influences the speed and acceleration of mobile contact, while eliminating stresses generated in parts outside the cut-off device during maintenance contact pressure.

A cet effet, la présente invention a pour objet un interrupteur électrique moyenne tension du genre incluant une chambre d'extinction d'arc de forme sensiblement cylindrique et obturée par deux fonds fixes, ladite chambre renfermant un contact d'arc fixe solidaire de l'un des fonds précités et relié électriquement à un premier conducteur d'amenée du courant et un contact d'arc mobile monté à coulissement longitudinal à travers l'autre des deux fonds, ledit contact mobile étant relié électriquement à un second conducteur d'amenée du courant et étant mu par un mécanisme de commande assurant la fermeture et la séparation desdits contacts d'arc, la pression des contacts en position de fermeture étant maintenue par un ressort agissant sur le contact mobile, cet interrupteur étant caractérisé en ce qu'il comporte un mécanisme à accumulation d'énergie coopérant avec le mécanisme de commande précité de manière à assurer lors d'une manoeuvre de fermeture successivement, la fermeture des contacts d'arc, puis une compression du ressort précité, ledit ressort à l'état comprimé agissant sur le contact mobile pour réaliser la pression des contacts d'arc, l'énergie accumulée lors de la compression du ressort étant utilisée pour assurer la séparation rapide des contacts d'arc lors d'une manoeuvre d'ouverture desdits contacts.To this end, the present invention relates to a medium voltage electric switch of the genre including an arc extinguishing chamber of substantially cylindrical and closed shape by two fixed bottoms, said chamber containing a fixed arcing contact secured to one of the aforementioned funds and electrically connected to a first current supply conductor and a movable arcing contact mounted to slide longitudinally through the other of the two bottoms, said movable contact being electrically connected to a second current supply conductor and being driven by a control mechanism ensuring the closing and the separation of said arcing contacts, the pressure of the contacts in the closed position being maintained by a spring acting on the movable contact, this switch being characterized in that it comprises an energy storage mechanism cooperating with the aforementioned control mechanism so as to ensure, during a closing operation, the closing of the arcing contacts, then compression of the aforementioned spring, said spring in the compressed state acting on the movable contact to realize the pressure of the arcing contacts, the energy accumulated during compression of the spring being used to ensure rapid separation arcing contacts during an opening operation of said contacts.

Selon une réalisation particulière, le mécanisme à accumulation d'énergie précité comporte un entraíneur en forme général de cadre, monté à coulissement dans un premier support fixe et logeant la chambre précitée, ledit entraíneur étant en appui, par sa partie supérieure, sur l'une des extrémités du ressort précité dont l'autre extrémité est en appui sur le support précité, tandis que sa partie inférieure coopère avec un système à passage de point mort relié de manière articulée d'une part, au mécanisme de commande et d'autre part, au contact d'arc mobile.According to a particular embodiment, the above-mentioned energy accumulation mechanism comprises a coach in the general form of a frame, mounted to slide in a first support fixed and housing the aforementioned chamber, said coach being in support, by its upper part, on one end of the aforementioned spring, the other end of which bears on the support aforementioned, while its lower part cooperates with a neutral passage system articulated on the one hand, to the control mechanism and on the other hand, to the movable arcing contact.

Selon une caractéristique particulière, ce mécanisme comporte en outre une butée destinée à limiter la course en translation de l'entraíneur lors d'une manoeuvre d'ouverture des contacts d'arc.According to a particular characteristic, this mechanism further comprises a stop intended for limit the translational travel of the coach during an opening maneuver arcing contacts.

Selon une caractéristique particulière, le système à passage de point mort comporte au moins une genouillère reliée de manière articulée à une bielle d'entraínement du mécanisme de commande, ladite genouillère se trouvant au voisinage du point mort en position de fermeture des contacts d'arc et coopérant par sa partie inférieure avec la partie inférieure de l'entraíneur.According to a particular characteristic, the neutral passage system comprises at minus a toggle joint articulated to a connecting rod of the mechanism said knee switch in the vicinity of neutral in the position of closing of the arcing contacts and cooperating by its lower part with the lower part of the coach.

Avantageusement, ce système comporte deux genouillères situées de part et d'autre de l'entraíneur et reliées par un élément de liaison en appui sur la partie inférieure de l'entraíneur.Advantageously, this system comprises two knee pads situated on either side of the coach and connected by a connecting element bearing on the lower part of the coach.

Selon une réalisation particulière, la ou les genouillère(s) précitée(s) est (sont) constituée(s) chacune par deux bielles reliées de manière articulée par l'une de leurs extrémités entre elles, lesdites bielles étant reliées de manière articulée par leur autre extrémité respectivement, au contact mobile et à une bielle de guidage, articulée sur un second support fixe.According to a particular embodiment, the aforementioned kneepad (s) is (are) made up each by two connecting rods connected in an articulated manner by one of their ends between them, said connecting rods being connected in an articulated manner by their other end respectively, to the movable contact and to a guide rod, articulated on a second fixed support.

Avantageusement, la ou les genouillère(s) est (sont) constituée(s) chacune par une manivelle double articulée sur le contact d'arc mobile et comprenant deux manivelles simples respectivement reliées de manière articulée à la bielle d'entraínement du mécanisme de commande et à une bielle de liaison reliée de manière articulée à une bielle de guidage articulée sur un second support fixe.Advantageously, the toggle (s) is (are) each made up of a crank double articulated on the movable arcing contact and comprising two single cranks respectively connected in an articulated manner to the drive rod of the control and a connecting rod hingedly connected to a guide rod articulated on a second fixed support.

Selon une variante de réalisation, le système à passage de point mort comporte au moins une came reliée de manière articulée à une bielle d'entraínement du mécanisme de commande et comportant une rainure arquée dans laquelle coulisse un ergot solidaire du contact mobile, ladite came étant en outre reliée de manière articulée à une bielle de guidage articulée sur un second support fixe et coopérant avec la partie inférieure de l'entraíneur.According to an alternative embodiment, the neutral passage system comprises at least a cam connected in an articulated manner to a connecting rod for the mechanism of control and comprising an arcuate groove in which slides a lug secured to the movable contact, said cam being also hingedly connected to a connecting rod articulated guide on a second fixed support and cooperating with the lower part of the coach.

Selon une autre caractéristique, les premier et second supports sont respectivement reliés électriquement aux premier et second conducteurs d'amenée de courant.According to another characteristic, the first and second supports are respectively connected electrically to the first and second current supply conductors.

Selon une autre caractéristique, le ressort précité est monté autour de la tige d'une vis traversant la partie supérieure de l'entraíneur et le premier support fixe pour se visser dans le contact d'arc fixe.According to another characteristic, the aforementioned spring is mounted around the rod of a screw through the upper part of the coach and the first fixed support to screw into the fixed arcing contact.

Avantageusement, en fin d'ouverture le contact mobile vient en appui sur une butée formée sur l'entraíneur de manière que l'énergie de choc engendrée par le déplacement du contact mobile soit absorbée par le ressort. Advantageously, at the end of opening, the movable contact comes to bear on a stop formed on the coach so that the impact energy generated by the displacement of the contact mobile is absorbed by the spring.

Mais d'autres avantages et caractéristiques de l'invention apparaítront mieux dans la description détaillée qui suit et se réfère aux dessins annexés donnés uniquement à titre d'exemple et dans lesquels :

  • la figure 1 est une vue partiellement en coupe illustrant un pôle du disjoncteur selon une réalisation particulière de l'invention.
  • Les figures 2 à 4, illustrent des vues en coupe du même pôle fixé sur un châssis, respectivement en position d'ouverture des contacts d'arc, en position de fermeture sans pression de contact, et en position de fermeture avec maintien de la pression de contact,
  • Les figures 5 à 7 illustrent, dans des vues schématiques, le fonctionnement du disjoncteur respectivement dans les trois positions précédemment mentionnées.
  • La figure 5a illustre une vue partielle schématique, d'une autre réalisation du système de point mort de l'invention.
However, other advantages and characteristics of the invention will appear better in the detailed description which follows and which refers to the appended drawings given solely by way of example and in which:
  • Figure 1 is a partially sectional view illustrating a pole of the circuit breaker according to a particular embodiment of the invention.
  • Figures 2 to 4 illustrate sectional views of the same pole fixed to a frame, respectively in the open position of the arcing contacts, in the closed position without contact pressure, and in the closed position with pressure maintenance of contact,
  • Figures 5 to 7 illustrate, in schematic views, the operation of the circuit breaker respectively in the three positions mentioned above.
  • FIG. 5a illustrates a partial schematic view of another embodiment of the neutral system of the invention.

Sur les figures, on voit l'un des pôles d'un disjoncteur selon une réalisation particulière de l'invention destiné à être fixé sur un châssis E. Ce pôle D comprend une chambre d'extinction d'arc 5 constituée par un cylindre obturé par deux fonds 5a, 5b et renfermant deux contacts d'arc 1, 2 respectivement fixe et mobile.In the figures, we see one of the poles of a circuit breaker according to a particular embodiment of the invention intended to be fixed to a chassis E. This pole D comprises a chamber arc extinction 5 constituted by a cylinder closed by two bottoms 5a, 5b and containing two arcing contacts 1, 2 respectively fixed and mobile.

Le contact d'arc fixe 1 est solidaire de l'un des fonds précités 5a et relié électriquement à un premier conducteur d'amenée du courant 20, tandis que le contact d'arc mobile 2 est monté à coulissement à travers l'autre des fonds 5b en étant relié électriquement à un second conducteur d'amenée du courant 21, et mécaniquement à un mécanisme de commande C. Ce mécanisme de commande C comprend une bielle d'entraínement (ou tige de commande 11) reliée de manière articulée à une manivelle double 30 reliée à une autre bielle 31, laquelle est reliée à un arbre d'entraínement 32. Conformément à l'invention, ce pôle D comprend en outre un mécanisme dit à accumulation d'énergie A comportant un dispositif d'entraínement, dit entraíneur 4, en forme générale de cadre, un système à passage de point mort S, et un ressort de pression 3. L'entraíneur 4 comprend une partie supérieure 4a formant palonnier et une partie inférieure 4b en forme de U, ces parties étant reliées par deux tirants 4c, 4d montés à coulissement à travers un support 6, dit premier, constituant le premier conducteur d'amenée du courant précité 20. La partie inférieure en forme de U 4b de l'entraíneur 4 est montée coulissante à travers un second support 13 constituant le second conducteur d'amenée du courant 21. La chambre d'extinction d'arc 5 est logée à l'intérieur de l'entraíneur 4 et le ressort de pression 3 est en appui, par l'une 3a de ses extrémités, sur la partie supérieure 4a de l'entraíneur, et, par son autre extrémité 3b sur le support fixe précité 6. Ce ressort est également monté autour de la tige 22 d'une vis 23 traversant la partie supérieure 4a de l'entraíneur 4 et le premier support 6 pour se visser dans le contact d'arc fixe 1.The fixed arcing contact 1 is integral with one of the aforementioned bottoms 5a and electrically connected to a first current supply conductor 20, while the movable arcing contact 2 is slidably mounted across the other of the bottoms 5b by being electrically connected to a second current supply conductor 21, and mechanically to a control C. This control mechanism C comprises a drive rod (or rod 11) connected in an articulated manner to a double crank 30 connected to another connecting rod 31, which is connected to a drive shaft 32. According to the invention, this pole D further comprises a mechanism known as energy storage A comprising a drive device, said coach 4, in general frame form, a system with passage from neutral S, and a pressure spring 3. The driver 4 comprises a part upper 4a forming a lifting beam and a lower part 4b in the shape of a U, these parts being connected by two tie rods 4c, 4d mounted to slide through a support 6, said first, constituting the first supply conductor of the aforementioned current 20. The lower part in U shape 4b of the coach 4 is slidably mounted through a second support 13 constituting the second current supply conductor 21. The arc extinguishing chamber 5 is housed inside the coach 4 and the pressure spring 3 is supported, by one 3a of its ends, on the upper part 4a of the coach, and, by its other end 3b on the above-mentioned fixed support 6. This spring is also mounted around the rod 22 with a screw 23 passing through the upper part 4a of the coach 4 and the first support 6 for screwing in the fixed arcing contact 1.

Selon une réalisation particulière de l'invention, le système à passage de point mort S comporte de chaque côté de l'entraíneur 4, deux genouillères 7, 8 constituées chacune par deux bielles 9,10 reliées de manière articulée entre elles, par l'une de leurs extrémités. Avantageusement, l'une des bielles est une manivelle double 14 constituée de deux manivelles simples 15,16, ladite manivelle étant reliée de manière articulée en un point situé entre ses deux manivelles 15, 16 au contact mobile 2. L'une 16 des manivelles simples est reliée en outre à une bielle intermédiaire 17, laquelle est reliée à une bielle de guidage 12 articulée sur le second support fixe 13, tandis que l'autre manivelle 15 est reliée de manière articulée à la tige de commande 11. Dans cette réalisation, les deux genouillères 7, 8 sont reliées par un axe ou analogue (non représenté) en appui sur la partie inférieure 4b de l'entraíneur 4.According to a particular embodiment of the invention, the system with passing through neutral S comprises on each side of the coach 4, two knee pads 7, 8 each constituted by two connecting rods 9,10 hingedly connected together, by one of their ends. Advantageously, one of the connecting rods is a double crank 14 made up of two simple cranks 15,16, said crank being hingedly connected at a point located between its two cranks 15, 16 at the movable contact 2. One 16 of the simple cranks is further connected to an intermediate rod 17, which is connected to a guide rod 12 articulated on the second fixed support 13, while the other crank 15 is connected so articulated to the control rod 11. In this embodiment, the two knee pads 7, 8 are connected by a pin or the like (not shown) bearing on the lower part 4b of the coach 4.

Suivant une variante de réalisation, illustrée sur la figure 5a, le système à passage de point mort S comporte, de chaque côté de l'entraíneur 4, une came 18 articulée sur la tige de commande 11 et comprenant une rainure circulaire 18a dans laquelle coulisse un ergot 18b solidaire du contact d'arc mobile 2, ladite came 18 étant en outre articulée sur la bielle de guidage 12 précitée en étant en appui sur la partie inférieure 4b de l'entraíneur 4.According to an alternative embodiment, illustrated in FIG. 5a, the point passing system dead S comprises, on each side of the trainer 4, a cam 18 articulated on the rod of control 11 and comprising a circular groove 18a in which slides a lug 18b secured to the movable arcing contact 2, said cam 18 being further articulated on the connecting rod guide 12 above while bearing on the lower part 4b of the coach 4.

On décrira ci-après le fonctionnement du disjoncteur de l'invention en référence aux figures.The operation of the circuit breaker of the invention will be described below with reference to figures.

Sur les figures 2 et 5, le mécanisme de coupure du pôle D est en position d'ouverture stable, les contacts d'arc 1, 2 étant ouverts. Lorsqu'on passe de la position de la figure 2 (respectivement 5) à la position de la figure 3 (respectivement 6), la tige de commande 11 s'est déplacée suivant le sens de la flèche F, ce qui a entraíné une rotation de la manivelle 14 (respectivement de la bielle 9) autour de l'axe X, dans le sens inverse des aiguilles d'une montre, entraínant un déplacement vers le haut du contact mobile 2, jusqu'à ce que les contacts d'arc 1, 2 soient fermés (figures 3 et 6). Dans cette position, la pression de contact n'est pas assurée. Lorsque l'on poursuit la manoeuvre de fermeture, la manivelle 14 et la bielle 17 (ou les deux bielles 9, 10) s'approchent de l'alignement, ce qui engendre une poussée sur la partie inférieure 4b de l'entraíneur 4 engendrant son déplacement vers le bas. Il s'ensuit une compression du ressort de pression 3 (figures 4 et 7) lequel, lorsque la manoeuvre de fermeture est achevée, applique par réaction, un effort sur la partie supérieure 4a de l'entraíneur 4 qui est ainsi sollicité vers le haut et exerce par sa partie inférieure 4b, un effort sur le contact mobile 2, assurant ainsi la pression de contact des contacts d'arc 1, 2. Le disjoncteur est alors en position fermée stable. On notera que dans cette position, la genouillère 7, 8 peut ne pas être tout à fait au point mort (c'est à dire en position alignée des bielles 9, 10, ou de la manivelle 14 et de la bielle 17).In Figures 2 and 5, the pole D cut-off mechanism is in the open position stable, arcing contacts 1, 2 being open. When moving from the position of Figure 2 (respectively 5) in the position of FIG. 3 (respectively 6), the control rod 11 moved in the direction of arrow F, which resulted in a rotation of the crank 14 (respectively of the connecting rod 9) around the X axis, counterclockwise shows, causing an upward movement of the movable contact 2, until the arcing contacts 1, 2 are closed (Figures 3 and 6). In this position, the contact pressure is not insured. When the closing operation is continued, the crank 14 and the connecting rod 17 (or the two connecting rods 9, 10) approach the alignment, which generates a thrust on the lower part 4b of the coach 4 causing it to move downwards. This results in compression of the pressure spring 3 (Figures 4 and 7) which, when the closing operation is completed, applied by reaction, an effort on the part upper 4a of the coach 4 which is thus urged upwards and exerts by its part lower 4b, a force on the movable contact 2, thus ensuring the contact pressure of the arcing contacts 1, 2. The circuit breaker is then in the stable closed position. Note that in this position, the knee switch 7, 8 may not be completely in neutral (i.e. aligned position of the connecting rods 9, 10, or of the crank 14 and of the connecting rod 17).

Lors d'une manoeuvre d'ouverture du disjoncteur, la bielle d'entraínement 11 est déplacée dans le sens opposé au précédent, ce qui engendre une rotation de la manivelle 14 et de la bielle 17. En début d'ouverture, l'énergie accumulée par le ressort 3 lors de la compression, se transforme en énergie cinétique, et l'entraíneur 4 est sollicité vers le haut par le ressort 3 jusqu'à ce qu'il vienne en appui contre la butée 33 formée à la partie supérieure de la vis 23 (figures 2,3 et 4), position représentée sur les figures 3 et 6. A cette étape, la manivelle 14 et la bielle 17 (ou bielles 9,10) sont mises en vitesse, ce qui provoque une séparation à grande vitesse des contacts d'arc 1, 2, et la venue en butée du contact mobile 2, sur une autre butée 34, formée sur l'entraíneur 4, l'énergie de choc étant ainsi absorbée par le ressort de pression 3.During an opening operation of the circuit breaker, the drive rod 11 is moved in the opposite direction to the previous one, which generates a rotation of the crank 14 and the connecting rod 17. At the start of opening, the energy accumulated by the spring 3 during compression, turns into kinetic energy, and the drive 4 is biased upwards by the spring 3 until it comes to bear against the stop 33 formed at the upper part of the screw 23 (Figures 2,3 and 4), position shown in Figures 3 and 6. At this stage, the crank 14 and the connecting rod 17 (or connecting rods 9.10) are set in speed, which causes separation at high speed of the arcing contacts 1, 2, and the abutment of the movable contact 2, on a another stop 34, formed on the coach 4, the impact energy thus being absorbed by the pressure spring 3.

On ne décrira pas le fonctionnement du disjoncteur comprenant un système d'entraínement du contact mobile 2 par l'intermédiaire d'une came 18 qui est le même que celui précédemment décrit .We will not describe the operation of the circuit breaker comprising a drive system movable contact 2 via a cam 18 which is the same as that previously described.

On notera que l'invention pourra être appliquée indifféremment pour la réalisation d'un interrupteur ou bien d'un disjoncteur ou tout système nécessitant un organe de coupure rapide.It will be noted that the invention may be applied equally for the production of a switch or a circuit breaker or any system requiring a breaking device fast.

On a donc réalisé grâce à l'invention, un disjoncteur ou interrupteur dans lequel l'inertie des pièces liées au maintien de la pression de contact n'intervient pas sur la vitesse de déplacement du contact mobile, et dans lequel les contraintes dues au maintien de l'effort de contact sont minimisées dans les pièces extérieures au disjoncteur.Thanks to the invention, a circuit breaker or switch has been produced in which the inertia parts linked to the maintenance of the contact pressure does not affect the speed of displacement of the movable contact, and in which the stresses due to the maintenance of the effort of contact are minimized in parts outside the circuit breaker.

Claims (11)

  1. A medium voltage electrical switch of the kind including an arc extinguishing chamber (5) of appreciably cylindrical shape and sealed by two fixed end plates, said chamber housing a stationary arcing contact (1) securedly affixed to one of the above-mentioned end plates and electrically connected to a first current conductor and a movable arcing contact (2) mounted with longitudinal sliding through the other of the two end plates, said movable contact (2) being electrically connected to a second current conductor and being moved by an operating mechanism performing closing and separation of said arcing contacts, the pressure of the contacts in the closed position being maintained by a spring (3) acting on the movable contact (2),
    characterized in that it comprises an energy storage mechanism (A) comprising a driver (4) in the general form of a frame, mounted with sliding in a first fixed support (6) and housing the above-mentioned chamber (5), said driver (4) bearing, by means of its upper part (4a), on one (3a) of the ends of the above-mentioned spring (3), the other end (3b) of which spring is bearing on the above-mentioned support (6), the lower part (4b) of the driver operating in conjunction with the operating mechanism (C) of the movable arcing contact (2) so as to successively perform, when a closing operation takes place, closing of the arcing contacts (1, 2), then compression of the spring (3), said spring (3) then acting on the movable contact (2) to provide the pressure of the arcing contacts (1, 2), the energy stored when compression of the spring (3) takes place enabling high-speed separation of the arcing contacts (1, 2) to be achieved when an opening operation of said contacts takes place.
  2. The switch according to claim 1, characterized in that the operating mechanism (C) is connected to the movable contact (2) by means of a dead point passage system (S) operating in conjunction with the lower part (4b) of the driver.
  3. The switch according to claim 2, characterized in that it comprises in addition a stop (33) designed to limit the travel of the driver (4) in translation when an opening operation of the arcing contacts takes place.
  4. The switch according to claim 2 or 3, characterized in that the dead point passage system (S) comprises at least one toggle joint (7) connected in articulated manner to a drive rod (11) of the operating mechanism (C), said toggle joint (7) being situated close to the dead point in the closed position of the arcing contacts (1, 2) and operating via its lower end in conjunction with the lower end (4b) of the driver (4).
  5. The switch according to claim 4, characterized in that the dead point passage system (S) comprises two toggle joints (7, 8) situated on each side of the driver (4) and connected to one another by a connecting element bearing on the lower part (4b) of the driver (4).
  6. The switch according to claim 4 or 5, characterized in that the above-mentioned toggle joint or joints (7, 8) is (are) each formed by two rods (9, 10) connected to one another in articulated manner via one of their ends, said rods (9, 10) being connected in articulated manner via their other end respectively to the movable contact (2) and to a guide rod (12) articulated on a second fixed support (13).
  7. The switch according to any one of the claims 4 to 6, characterized in that the toggle joint or joints (7, 8) is (are) each formed by a double crank (14) articulated on the movable arcing contact and comprising two single cranks (15, 16) respectively connected in articulated manner to the drive rod (11) and to a connecting rod (17) connected in articulated manner to a guide rod (12), which is articulated on a second fixed support (13).
  8. The switch according to any one of the claims 1 to 3, characterized in that the dead point passage system (S) comprises at least one cam (18) connected in articulated manner to a drive rod (11) of the operating mechanism (C) and comprising an arched groove (18a) in which a spigot (18b) securedly affixed to the movable contact (2) slides, said cam (18) being connected in articulated manner to a drive rod (12) articulated on a second fixed support (13) and operating in conjunction with the lower part (4b) of the driver (4).
  9. The switch according to any one of the claims 6 to 8, characterized in that the first and second supports (6, 13) are electrically connected respectively to the first and second current conductors (20, 21).
  10. The switch according to any one of the claims 2 to 9, characterized in that the above-mentioned spring (3) is mounted around the shank (22) of a screw (23) passing through the upper part (4a) of the driver (4) and the first fixed support (6) to be screwed into the stationary arcing contact (1).
  11. The switch according to any one of the foregoing claims, characterized in that at the end of opening the movable contact (2) is bearing against a stop (34) formed on the driver (4) so that the impact energy generated by the movement of the movable contact (2) is absorbed by the spring (3).
EP19950410095 1994-09-29 1995-09-05 Middle voltage interruptor or circuit breaker Expired - Lifetime EP0704872B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9411775 1994-09-29
FR9411775A FR2725303B1 (en) 1994-09-29 1994-09-29 MEDIUM VOLTAGE SWITCH OR CIRCUIT BREAKER

Publications (2)

Publication Number Publication Date
EP0704872A1 EP0704872A1 (en) 1996-04-03
EP0704872B1 true EP0704872B1 (en) 2000-05-10

Family

ID=9467499

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950410095 Expired - Lifetime EP0704872B1 (en) 1994-09-29 1995-09-05 Middle voltage interruptor or circuit breaker

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EP (1) EP0704872B1 (en)
CN (1) CN1062378C (en)
DE (1) DE69516790T2 (en)
ES (1) ES2147827T3 (en)
FR (1) FR2725303B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1020582C2 (en) * 2002-05-13 2003-11-25 Holec Holland Nv Drive rod for switch.
WO2011111086A1 (en) 2010-03-08 2011-09-15 三菱電機株式会社 Electric-power breaker
US8941022B2 (en) 2010-12-20 2015-01-27 Mitsubishi Electric Corporation Switching apparatus
AU2011346187B2 (en) * 2010-12-20 2014-10-09 Mitsubishi Electric Corporation Power switch device
CN110544597A (en) * 2019-09-30 2019-12-06 山东泰开高压开关有限公司 auxiliary arc extinguishing device for 800kV external grounding switch and use method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372353A (en) * 1966-10-20 1968-03-05 Electric Machinery Mfg Co Toggle operated electric vacuum switch
DE3414016A1 (en) * 1984-04-12 1985-10-17 Siemens AG, 1000 Berlin und 8000 München VACUUM SWITCHING DEVICE WITH A DRIVE DEVICE AND WITH A SPRING BASED ON THE MOVABLE CONNECTING PIN OF THE SWITCH TUBES
DE3726739A1 (en) * 1987-08-07 1988-03-03 Slamecka Ernst Contact pressure-producing device especially for vacuum switches in a single-row or double-row arrangement
FR2677168B1 (en) 1991-06-03 1994-06-17 Merlin Gerin MEDIUM VOLTAGE CIRCUIT BREAKER WITH REDUCED CONTROL ENERGY.
DE4133092A1 (en) * 1991-09-30 1993-04-01 Siemens Ag MULTIPOLE VACUUM SWITCH WITH A POLAR DRIVE UNIT FOR EVERY VACUUM SWITCH TUBE
JPH05190063A (en) 1992-01-17 1993-07-30 Toshiba Corp Vacuum circuit-breaker

Also Published As

Publication number Publication date
DE69516790D1 (en) 2000-06-15
EP0704872A1 (en) 1996-04-03
FR2725303B1 (en) 1996-10-31
ES2147827T3 (en) 2000-10-01
CN1062378C (en) 2001-02-21
DE69516790T2 (en) 2000-11-16
FR2725303A1 (en) 1996-04-05
CN1125353A (en) 1996-06-26

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