EP1006547B1 - Closing resistor insertion mechanism with ball lock retainer - Google Patents

Closing resistor insertion mechanism with ball lock retainer Download PDF

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Publication number
EP1006547B1
EP1006547B1 EP99402903A EP99402903A EP1006547B1 EP 1006547 B1 EP1006547 B1 EP 1006547B1 EP 99402903 A EP99402903 A EP 99402903A EP 99402903 A EP99402903 A EP 99402903A EP 1006547 B1 EP1006547 B1 EP 1006547B1
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EP
European Patent Office
Prior art keywords
tube
rod
groove
ball
shoulder
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Expired - Lifetime
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EP99402903A
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German (de)
French (fr)
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EP1006547A1 (en
Inventor
Roger Ledru
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Grid Solutions SAS
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Areva T&D SAS
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Publication of EP1006547A1 publication Critical patent/EP1006547A1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/50—Adjustable resistors structurally combined with switching arrangements
    • 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
    • H01H33/166—Impedances connected with contacts the impedance being inserted only while closing the switch

Definitions

  • the invention relates to a mechanism for inserting a resistor in an electrical switch during a closing operation thereof so as to limit the effects of the capacitive currents present on the line of the switch. More particularly, the invention relates to a mechanism for inserting a closing resistor for a high voltage shielded circuit breaker.
  • This type of switch comprises a metal casing which extends in an axial direction, generally made of aluminum sheet, filled with a dielectric gas in which are mounted two moving contact crews in the axial direction, each contact crew including permanent current contact and arc contact.
  • One of the two contact equipments is semi-movable in that its displacement in the axial direction is coordinated with the displacement of the other pair of contacts via a linkage or movement transfer system.
  • Such a known mechanism comprises a metal tube coaxial with the rod and sliding in electrical contact thereon and one end of which is engaged on a conductive terminal of the switch to bypass the resistance.
  • the end of the tube coming to engage the conductive terminal is formed of a flexible ring of fingers.
  • a spring is disposed between a first shoulder provided on the rod and a second shoulder provided on the tube so as to be compressed during a first phase of an opening operation of the switch and exercise, during a second phase of the operation of opening the switch after the first phase, a restoring force on the tube to move it in said direction to separate it from said terminal.
  • the mechanism of insertion of the resistance is designed so that the effort of the compressed spring always remains lower than the pulling force of the tube, the withdrawal of the latter being done by abutment in the direction axial axis of the semi-moving contact rod against the metal tube.
  • the object of the invention is to overcome these disadvantages.
  • the subject of the invention is a mechanism for inserting a closing resistor for an electrical switch comprising a next semicommeable arc contact, an axial direction which is integral with a metal rod which is extends in this direction between the arcing contact and the resistor, this mechanism comprising a metal tube coaxial with the rod and sliding in electrical contact thereon and an end of which is engaged on a conductive terminal of the switch for short-circuiting the resistor, a spring disposed between a first shoulder provided on the rod and a second shoulder provided on the tube so as to be compressed during a first phase of an opening operation of the switch and to exert, during a second phase of the operation of opening the switch subsequent to the first phase, a restoring force on the tube to move it in said direction to separate it from said terminal, characterized in that the mechanism further comprises a system with at least one ball that locks the tube moving in said direction when the first opening phase and retracts during the second opening phase to release said tube moving in said direction.
  • Figures 1 to 4 show very schematically the mechanism of insertion of the resistance during different phases of an opening operation of the switch.
  • Figures 5 to 7 show very schematically the mechanism of insertion of the resistance during different phases of a closing operation of the switch.
  • the mechanism for inserting a resistor according to the invention is intended to equip in particular a high voltage shielded circuit breaker comprising two crews of movable contacts relative to one another in an axial direction A and not shown to the left on the figures.
  • One of the crews is semi-mobile in this direction and has an extended arc contact of a metal rod 1 which extends between the arc contact and a closing resistor not shown to the right in the figures.
  • the insertion mechanism according to the invention is arranged in line with the breaking chamber of the circuit breaker and behind the semi-mobile arc contact.
  • this mechanism comprises a metal tube 2 which is coaxial with the rod 1 and slidably mounted thereon.
  • the tube 2 is in electrical contact with the rod 1 via sliding contacts 3 surrounding the rod 1 and arranged in a first bore 4 of the tube 2.
  • the end of the tube 2 which faces the breaking chamber of the circuit breaker carries a ring of flexible fingers 5 which are engaged on a conductive terminal 5 'electrically connected to a circuit breaker socket .
  • the tube 2 thus comprises a first annular bore 4, followed by a first annular shoulder 6 extending radially towards the axis A, followed by a second annular bore 7 with a recess 8 returning to the axis A, followed by a second annular shoulder 9 extending towards the axis A, followed finally by a third annular bore 10 in which is provided an annular groove 11.
  • the rod 1 comprises from left to right, a collar 12 forming an annular shoulder which is placed along the rod to be moved between the shoulder 6 of the tube 2 and the recess 8 thereof, followed by a annular groove 13 which is placed along the rod to be displaced between the shoulder 9 and the groove 11 of the metal tube 2.
  • the rear edge of the groove 13 is constituted by the fillet-shaped end of a substantially frustoconical tubular piece 14 which is coaxial with the rod 1 and which is arranged between the latter and the bore 10 of the tube 2.
  • the tubular part 14 has an annular bore 15 whose bottom faces the end in the form of fillet, this bore 15 bearing against an annular shoulder 16 end of the rod 1.
  • the shoulder 16 is preferably constituted by an insert facilitating the establishment of the various elements of the mechanism around the rod 1.
  • the rod 1, between the groove 13 and the shoulder 16 still has a double recess 17 and 18, the end shaped fillet the tubular member 14 sliding on the surface of the first recess 17 of the rod 1 in the direction A.
  • the rear end of the tube 2 is closed by a bushing 20 coaxially traversed by the tube 19.
  • Sliding contacts 21 are arranged between the sleeve 20 and the tube 19 to allow the passage of the stream of the tube 2 to the tube 19 which is electrically connected to the resistor.
  • a first compression spring 22 is disposed between the shoulder 12 of the rod 1 and the shoulder 9 of the tube 1.
  • a second compression spring 23 is disposed between the bottom of the bore 15 of the tubular piece 14 and the shoulder 16 of the rod 1.
  • the tube 2 is locked in displacement in the direction A by a ball system (s) 24 retractable (s). More particularly, when the circuit breaker is closed, each ball 24 is engaged in the groove 11 of the tube 2 and in a hole 25 of the tube 19 which faces this groove, the ball 24 resting on the cylindrical outer surface of the tubular piece 14
  • a single ball is shown but it should be understood that the stop preferably comprises a plurality of balls distributed over the circumference of the annular groove 11 facing a plurality of holes 25 also distributed over the circumference of the tube 19.
  • the rod 1 When an opening maneuver, the rod 1 is moved in the direction A from left to right in the figures and when the groove 13 on the rod 1 faces the hole 25 in the tube 19, the ball 24 is retracted to the inside of the groove 13 to release the tube 2 in displacement in the direction A. It is understood that the unlocking of the tube 2 takes place only after a complete separation of the contacts of the circuit breaker corresponda At a certain displacement of the rod 1. With the retractable ball system (s) according to the invention, it is not necessary to control the force exerted by the fingers 5 of the tube 2 on the terminal 5 '. The disengagement takes place when the shoulder 12 of the rod 1 comes to drive the tube 2 through the shoulder 8 on a sufficient stroke in the axial direction A.
  • FIG. 1 the circuit breaker is closed.
  • the fingers 5 are connected to the terminal 5 '.
  • the resistor is short-circuited by the fact that the current flows from the semiautomatic arc contact to a circuit-breaker socket via the rod 1, the sliding contacts 3, the metal tube 2, the fingers 5 and of the conductive terminal 5 '.
  • the ball 24 is engaged in the groove 11 of the tube 2 and in a hole 25 of the tube 19 so that the tube 2 is locked in displacement in the direction A.
  • the spring 22 is expanded between the two shoulders 6 and 9 and the spring 23 is expanded between the bottom of the bore 15 and the shoulder 16.
  • the fillet-shaped end of the tubular piece 14 bears against the stop of the recess 17 closest to the groove 13.
  • the rod 1 moves back to the right in the figure which causes a compression of the spring 22 between the shoulder 12 of the rod 1 and the shoulder 9 of the tube 2 which has remained fixed in the direction A since locked in displacement by the play of the ball 24 engaged in the groove 11 and in the hole 25.
  • the fingers 5 are always skewered on the conductive terminal 5 '.
  • the shoulder 12 of the rod 1 abuts against the edge of the recess 8 in the tube 2 at the same time that the groove 13 of the rod faces the hole 25 of the tube 19.
  • the rod 1 continues to move along the direction A to the right in the figure and the spring 22 previously compressed relaxes and exerts a restoring force which tends to move the tube 2 to the right 2.
  • the tube 2 therefore slides on the rod 1 until the shoulder 6 comes into abutment against the shoulder 12.
  • the stroke of the tube 2 along the rod 1 must be adjusted to ensure electrical insulation between the fingers 5 and the conductive terminal 5 .
  • the mechanism is now ready for a closing operation with insertion of the resistor.
  • the rod 1 is pulled to the left in the figure and drives in the same direction the tube 2 by the play of the shoulder 12 of the rod 1 which comes into abutment against the shoulder 6 of the tube 2.
  • the arcing contacts of the circuit breaker approach each other at the same time as the fingers 5 are approaching the terminal 5 '.
  • the resistor is inserted because the current passes through the rod 1, the sliding contacts 3, the tube 2, the sliding contacts 21, the tube 19.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Description

L'invention porte sur un mécanisme pour insérer une résistance dans un interrupteur électrique lors d'une manoeuvre de fermeture de celui-ci de façon à limiter les effets des courants capacitifs présents sur la ligne de l'interrupteur. Plus particulièrement, l'invention porte sur un mécanisme d'insertion d'une résistance de fermeture pour un disjoncteur blindé haute tension. Ce type d'interrupteur comprend une enveloppe métallique qui s'étend suivant une direction axiale, généralement en tôle d'aluminium, remplie d'un gaz diélectrique dans laquelle sont montés deux équipages de contacts mobiles suivant la direction axiale, chaque équipage de contacts incluant un contact de courant permanent et un contact d'arc. Un des deux équipage de contacts est semi-mobile en ce sens que son déplacement suivant la direction axiale est coordonné avec le déplacement de l'autre équipage de contacts par l'intermédiaire d'un embiellage ou système de renvoi de mouvement. Pour équiper ce type d'interrupteur d'un mécanisme d'insertion d'une résistance de fermeture en modifiant le moins possible la structure de la chambre de coupure de l'interrupteur, on prévoie de prolonger le contact d'arc semi-mobile d'une tige métallique qui s'étend suivant la direction axiale entre ce contact d'arc et la résistance.The invention relates to a mechanism for inserting a resistor in an electrical switch during a closing operation thereof so as to limit the effects of the capacitive currents present on the line of the switch. More particularly, the invention relates to a mechanism for inserting a closing resistor for a high voltage shielded circuit breaker. This type of switch comprises a metal casing which extends in an axial direction, generally made of aluminum sheet, filled with a dielectric gas in which are mounted two moving contact crews in the axial direction, each contact crew including permanent current contact and arc contact. One of the two contact equipments is semi-movable in that its displacement in the axial direction is coordinated with the displacement of the other pair of contacts via a linkage or movement transfer system. To equip this type of switch with a mechanism for inserting a closing resistor while modifying as little as possible the structure of the interrupting chamber of the switch, provision is made to extend the semi-mobile arc contact a metal rod extending in the axial direction between this arc contact and the resistor.

Un tel mécanisme connu comprend un tube métallique coaxial à la tige et coulissant en contact électrique sur celle-ci et dont une extrémité vient s'embrocher sur une borne conductrice de l'interrupteur pour court-circuiter la résistance. L'extrémité du tube venant s'embrocher sur la borne conductrice est formée d'une couronne de doigts flexibles. Un ressort est disposé entre un premier épaulement prévu sur la tige et un second épaulement prévu sur le tube de façon à être comprimé lors d'une première phase d'une manoeuvre d'ouverture de l'interrupteur et exercer, lors d'une seconde phase de la manoeuvre d'ouverture de l'interrupteur subséquente à la première phase, une force de rappel sur le tube pour le déplacer suivant ladite direction afin de le séparer de ladite borne. Quand l'interrupteur est fermé, la couronne de doigts du tube métallique est embrochée sur la borne conductrice qui est normalement reliée à une prise de l'interrupteur. Lors d'une opération d'ouverture, il est important que la couronne de doigts du tube métallique ne se débroche pas de la borne conductrice avant la séparation complète des contacts de l'interrupteur. C'est pourquoi, le mécanisme d'insertion de la résistance est conçu pour que l'effort du ressort comprimé reste toujours inférieur à l'effort de débrochage du tube, le débrochage de ce dernier se faisant par la mise en butée suivant la direction axiale de la tige du contact semi-mobile contre le tube métallique.Such a known mechanism comprises a metal tube coaxial with the rod and sliding in electrical contact thereon and one end of which is engaged on a conductive terminal of the switch to bypass the resistance. The end of the tube coming to engage the conductive terminal is formed of a flexible ring of fingers. A spring is disposed between a first shoulder provided on the rod and a second shoulder provided on the tube so as to be compressed during a first phase of an opening operation of the switch and exercise, during a second phase of the operation of opening the switch after the first phase, a restoring force on the tube to move it in said direction to separate it from said terminal. When the switch is closed, the ring of fingers of the metal tube is plugged into the conductive terminal which is normally connected to a plug of the switch. During an opening operation, it is important that the ring of fingers of the metal tube does not disconnect from the conductive terminal before complete separation of the contacts of the switch. Therefore, the mechanism of insertion of the resistance is designed so that the effort of the compressed spring always remains lower than the pulling force of the tube, the withdrawal of the latter being done by abutment in the direction axial axis of the semi-moving contact rod against the metal tube.

Outre le fait que la maîtrise de l'effort au niveau des doigts flexibles du tube métallique est délicate, l'usure dans le temps de ces doigts conduit à une perte de fiabilité du mécanisme d'insertion de la résistance de fermeture.In addition to the fact that the control of the force at the flexible fingers of the metal tube is delicate, the wear over time of these fingers leads to a loss of reliability of the insertion mechanism of the closing resistance.

Le but de l'invention est de remédier à ces inconvénients.The object of the invention is to overcome these disadvantages.

A cet effet, l'invention a pour objet un mécanisme d'insertion d'une résistance de fermeture pour un interrupteur électrique comprenant un contact d'arc semi-mobile suivant, une direction axiale qui est solidaire d'une tige métallique qui s'étend suivant cette direction entre le contact d'arc et la résistance, ce mécanisme comprenant un tube métallique coaxial à la tige et coulissant en contact électrique sur celle-ci et dont une extrémité vient s'embrocher sur une borne conductrice de l'interrupteur pour court-circuiter la résistance, un ressort disposé entre un premier épaulement prévu sur la tige et un second épaulement prévu sur le tube de façon à être comprimé lors d'une première phase d'une manoeuvre d'ouverture de l'interrupteur et exercer, lors d'une seconde phase de la manoeuvre d'ouverture de l'interrupteur subséquente à la première phase, une force de rappel sur le tube pour le déplacer suivant ladite direction afin de le séparer de ladite borne, caractérisé en ce que le mécanisme comprend en outre un système avec au moins une bille qui verrouille le tube en déplacement selon ladite direction lors de la première phase d'ouverture et qui s'escamote lors de la seconde phase d'ouverture afin de libérer ledit tube en déplacement suivant ladite direction.To this end, the subject of the invention is a mechanism for inserting a closing resistor for an electrical switch comprising a next semicommeable arc contact, an axial direction which is integral with a metal rod which is extends in this direction between the arcing contact and the resistor, this mechanism comprising a metal tube coaxial with the rod and sliding in electrical contact thereon and an end of which is engaged on a conductive terminal of the switch for short-circuiting the resistor, a spring disposed between a first shoulder provided on the rod and a second shoulder provided on the tube so as to be compressed during a first phase of an opening operation of the switch and to exert, during a second phase of the operation of opening the switch subsequent to the first phase, a restoring force on the tube to move it in said direction to separate it from said terminal, characterized in that the mechanism further comprises a system with at least one ball that locks the tube moving in said direction when the first opening phase and retracts during the second opening phase to release said tube moving in said direction.

Le mécanisme d'insertion d'un résistance de fermeture selon l'invention est décrit ci-après en détail et illustré sur les dessins.The mechanism for inserting a closure resistor according to the invention is described hereinafter in detail and illustrated in the drawings.

Les figures 1 à 4 montrent de façon très schématique le mécanisme d'insertion de la résistance lors de différentes phases d'une manoeuvre d'ouverture de l'interrupteur.Figures 1 to 4 show very schematically the mechanism of insertion of the resistance during different phases of an opening operation of the switch.

Les figures 5 à 7 montrent de façon très schématique le mécanisme d'insertion de la résistance lors de différentes phases d'une manoeuvre de fermeture de l'interrupteur.Figures 5 to 7 show very schematically the mechanism of insertion of the resistance during different phases of a closing operation of the switch.

Le mécanisme d'insertion d'une résistance selon l'invention est prévu pour équiper notamment un disjoncteur blindé pour haute tension comprenant deux équipages de contacts mobiles l'un par rapport à l'autre suivant une direction axiale A et non représentés à gauche sur les figures. Un des équipages est semi-mobile suivant cette direction et comporte un contact d'arc prolongé d'une tige métallique 1 qui s'étend entre le contact d'arc et une résistance de fermeture non représentée à droite sur les figures.The mechanism for inserting a resistor according to the invention is intended to equip in particular a high voltage shielded circuit breaker comprising two crews of movable contacts relative to one another in an axial direction A and not shown to the left on the figures. One of the crews is semi-mobile in this direction and has an extended arc contact of a metal rod 1 which extends between the arc contact and a closing resistor not shown to the right in the figures.

Le mécanisme d'insertion selon l'invention est disposé en ligne avec la chambre de coupure du disjoncteur et en arrière du contact d'arc semi-mobile. Sur les figures, ce mécanisme comprend un tube métallique 2 qui est coaxial à la tige 1 et monté coulissant sur celle-ci. Le tube 2 est en contact électrique avec la tige 1 par l'intermédiaire de contacts glissants 3 entourant la tige 1 et disposés dans un premier alésage 4 du tube 2. L'extrémité du tube 2 qui fait face à la chambre de coupure du disjoncteur porte une couronne de doigts flexibles 5 qui viennent s'embrocher sur une borne conductrice 5' reliée électriquement à une prise de courant du disjoncteur.The insertion mechanism according to the invention is arranged in line with the breaking chamber of the circuit breaker and behind the semi-mobile arc contact. In the figures, this mechanism comprises a metal tube 2 which is coaxial with the rod 1 and slidably mounted thereon. The tube 2 is in electrical contact with the rod 1 via sliding contacts 3 surrounding the rod 1 and arranged in a first bore 4 of the tube 2. The end of the tube 2 which faces the breaking chamber of the circuit breaker carries a ring of flexible fingers 5 which are engaged on a conductive terminal 5 'electrically connected to a circuit breaker socket .

De la gauche vers la droite sur les figures, le tube 2 comporte donc un premier alésage annulaire 4, suivi d'un premier épaulement annulaire 6 s'étendant radialement en direction de l'axe A, suivi d'un second alésage annulaire 7 avec un décrochement 8 revenant vers l'axe A, suivi d'un second épaulement annulaire 9 s'étendant en direction de l'axe A, suivi enfin d'un troisième alésage annulaire 10 dans lequel est prévu une gorge annulaire 11.From the left to the right in the figures, the tube 2 thus comprises a first annular bore 4, followed by a first annular shoulder 6 extending radially towards the axis A, followed by a second annular bore 7 with a recess 8 returning to the axis A, followed by a second annular shoulder 9 extending towards the axis A, followed finally by a third annular bore 10 in which is provided an annular groove 11.

La tige 1 comporte de la gauche vers la droite, un collier 12 formant un épaulement annulaire qui est placé le long de la tige pour être déplacé entre l'épaulement 6 du tube 2 et le décrochement 8 de celui-ci, suivi d'une gorge annulaire 13 qui est placée le long de la tige pour être déplacée entre l'épaulement 9 et la gorge 11 du tube métallique 2.The rod 1 comprises from left to right, a collar 12 forming an annular shoulder which is placed along the rod to be moved between the shoulder 6 of the tube 2 and the recess 8 thereof, followed by a annular groove 13 which is placed along the rod to be displaced between the shoulder 9 and the groove 11 of the metal tube 2.

Le bord arrière de la gorge 13 est constitué par l'extrémité en forme de congé d'une pièce tubulaire 14 sensiblement tronconique qui est coaxiale à la tige 1 et qui est disposée entre celle-ci et l'alésage 10 du tube 2. La pièce tubulaire 14 comporte un alésage annulaire 15 dont le fond fait face à l'extrémité en forme de congé, cet alésage 15 venant en appui contre un épaulement annulaire 16 d'extrémité de la tige 1. L'épaulement 16 est de préférence constitué par une pièce rapportée facilitant la mise en place des différents éléments du mécanisme autour de la tige 1. La tige 1, entre la gorge 13 et l'épaulement 16, présente encore un double décrochement 17 et 18, l'extrémité en forme de congé de la pièce tubulaire 14 coulissant sur la surface du premier décrochement 17 de la tige 1 suivant la direction A.The rear edge of the groove 13 is constituted by the fillet-shaped end of a substantially frustoconical tubular piece 14 which is coaxial with the rod 1 and which is arranged between the latter and the bore 10 of the tube 2. The tubular part 14 has an annular bore 15 whose bottom faces the end in the form of fillet, this bore 15 bearing against an annular shoulder 16 end of the rod 1. The shoulder 16 is preferably constituted by an insert facilitating the establishment of the various elements of the mechanism around the rod 1. The rod 1, between the groove 13 and the shoulder 16, still has a double recess 17 and 18, the end shaped fillet the tubular member 14 sliding on the surface of the first recess 17 of the rod 1 in the direction A.

Un autre tube 19, fixe suivant la direction A et coaxial à la tige 1, est disposé entre l'alésage 10 et la pièce tubulaire 14. L'extrémité arrière du tube 2 est fermée par une douille 20 traversée de façon coaxiale par le tube 19. Des contacts glissants 21 sont disposés entre la douille 20 et le tube 19 pour permettre le passage du courant du tube 2 vers le tube 19 qui est relié électriquement à la résistance.Another tube 19, fixed in the direction A and coaxial with the rod 1, is disposed between the bore 10 and the tubular part 14. The rear end of the tube 2 is closed by a bushing 20 coaxially traversed by the tube 19. Sliding contacts 21 are arranged between the sleeve 20 and the tube 19 to allow the passage of the stream of the tube 2 to the tube 19 which is electrically connected to the resistor.

Un premier ressort de compression 22 est disposé entre l'épaulement 12 de la tige 1 et l'épaulement 9 du tube 1. Un second ressort de compression 23 est disposé entre le fond de l'alésage 15 de la pièce tubulaire 14 et l'épaulement 16 de la tige 1.A first compression spring 22 is disposed between the shoulder 12 of the rod 1 and the shoulder 9 of the tube 1. A second compression spring 23 is disposed between the bottom of the bore 15 of the tubular piece 14 and the shoulder 16 of the rod 1.

Dans le mécanisme d'insertion de la résistance selon l'invention, le tube 2 est verrouillé en déplacement suivant la direction A par un système à bille(s) 24 escamotable(s). Plus particulièrement, quand le disjoncteur est fermé, chaque bille 24 est engagée dans la gorge 11 du tube 2 et dans un trou 25 du tube 19 qui fait face à cette gorge, la bille 24 reposant sur la surface extérieure cylindrique de la pièce tubulaire 14. Sur les figures, une seule bille est représentée mais il faut comprendre que la butée comporte de préférence plusieurs billes réparties sur la circonférence de la gorge annulaire 11 en faisant face à plusieurs trous 25 également répartis sur la circonférence du tube 19. Lors d'une manoeuvre d'ouverture, la tige 1 est déplacée suivant la direction A de la gauche vers la droite sur les figures et quand la gorge 13 sur la tige 1 fait face au trou 25 dans le tube 19, la bille 24 s'escamote à l'intérieur de la gorge 13 pour libérer le tube 2 en déplacement suivant la direction A. Il est entendu que le déverrouillage du tube 2 s'effectue seulement après une séparation complète des contacts du disjoncteur correspondant à une certain déplacement de la tige 1. Avec le système à bille(s) escamotable(s) selon l'invention, il n'est pas nécessaire de contrôler l'effort qu'exercent les doigts 5 du tube 2 sur la borne 5'. Le débrochage s'effectue lorsque l'épaulement 12 de la tige 1 vient entraîner le tube 2 par l'intermédiaire de l'épaulement 8 sur une course suffisante suivant la direction axiale A.In the mechanism of insertion of the resistance according to the invention, the tube 2 is locked in displacement in the direction A by a ball system (s) 24 retractable (s). More particularly, when the circuit breaker is closed, each ball 24 is engaged in the groove 11 of the tube 2 and in a hole 25 of the tube 19 which faces this groove, the ball 24 resting on the cylindrical outer surface of the tubular piece 14 In the figures, a single ball is shown but it should be understood that the stop preferably comprises a plurality of balls distributed over the circumference of the annular groove 11 facing a plurality of holes 25 also distributed over the circumference of the tube 19. When an opening maneuver, the rod 1 is moved in the direction A from left to right in the figures and when the groove 13 on the rod 1 faces the hole 25 in the tube 19, the ball 24 is retracted to the inside of the groove 13 to release the tube 2 in displacement in the direction A. It is understood that the unlocking of the tube 2 takes place only after a complete separation of the contacts of the circuit breaker corresponda At a certain displacement of the rod 1. With the retractable ball system (s) according to the invention, it is not necessary to control the force exerted by the fingers 5 of the tube 2 on the terminal 5 '. The disengagement takes place when the shoulder 12 of the rod 1 comes to drive the tube 2 through the shoulder 8 on a sufficient stroke in the axial direction A.

Le fonctionnement du mécanisme d'insertion d'une résistance de fermeture selon l'invention est le suivant.The operation of the mechanism for inserting a closing resistor according to the invention is as follows.

Figure 1, le disjoncteur est fermé. Les doigts 5 sont embrochés sur la borne 5'. La résistance est court-circuitée du fait que le courant passe du contact d'arc semi-mobile vers une prise de courant du disjoncteur par l'intermédiaire de la tige 1, des contacts glissants 3, du tube métallique 2, des doits 5 et de la borne conductrice 5'. La bille 24 est engagée dans la gorge 11 du tube 2 et dans un trou 25 du tube 19 ce qui fait que le tube 2 est verrouillé en déplacement suivant la direction A. Le ressort 22 est détendu entre les deux épaulements 6 et 9 et le ressort 23 est détendu entre le fond de l'alésage 15 et l'épaulement 16. L'extrémité en forme de congé de la pièce tubulaire 14 est en appui contre l'arrête du décrochement 17 la plus proche de la gorge 13.Figure 1, the circuit breaker is closed. The fingers 5 are connected to the terminal 5 '. The resistor is short-circuited by the fact that the current flows from the semiautomatic arc contact to a circuit-breaker socket via the rod 1, the sliding contacts 3, the metal tube 2, the fingers 5 and of the conductive terminal 5 '. The ball 24 is engaged in the groove 11 of the tube 2 and in a hole 25 of the tube 19 so that the tube 2 is locked in displacement in the direction A. The spring 22 is expanded between the two shoulders 6 and 9 and the spring 23 is expanded between the bottom of the bore 15 and the shoulder 16. The fillet-shaped end of the tubular piece 14 bears against the stop of the recess 17 closest to the groove 13.

Lors d'une première phase d'une manoeuvre d'ouverture du disjoncteur, figure 2, la tige 1 recule vers la droite sur la figure ce qui entraîne une compression du ressort 22 entre l'épaulement 12 de la tige 1 et l'épaulement 9 du tube 2 qui est resté fixe suivant la direction A puisque verrouillé en déplacement par le jeu de la bille 24 en prise dans la gorge 11 et dans le trou 25. Les doigts 5 sont toujours embrochés sur la borne conductrice 5'. En poursuivant son déplacement vers la droite, l'épaulement 12 de la tige 1 vient en butée contre le bord du décrochement 8 dans le tube 2 en même temps que la gorge 13 de la tige fait face au trou 25 du tube 19.During a first phase of an opening maneuver of the circuit breaker, FIG. 2, the rod 1 moves back to the right in the figure which causes a compression of the spring 22 between the shoulder 12 of the rod 1 and the shoulder 9 of the tube 2 which has remained fixed in the direction A since locked in displacement by the play of the ball 24 engaged in the groove 11 and in the hole 25. The fingers 5 are always skewered on the conductive terminal 5 '. Continuing its movement to the right, the shoulder 12 of the rod 1 abuts against the edge of the recess 8 in the tube 2 at the same time that the groove 13 of the rod faces the hole 25 of the tube 19.

Figure 3, lors d'une seconde phase de cette manoeuvre d'ouverture, le déplacement combiné de la tige 1 et du tube 2 vers la droite force la bille 24 à s'escamoter à l'intérieur de la gorge 13 ce qui déverrouille le tube 2 en déplacement suivant la direction A. A partir de ce moment, les doigts 5 se séparent de la borne conductrice 5'.3, during a second phase of this opening operation, the combined movement of the rod 1 and the tube 2 to the right forces the ball 24 to retract inside the groove 13 which unlocks the tube 2 in displacement in the direction A. From this moment, the fingers 5 separate from the conductive terminal 5 '.

Figure 4, la tige 1 poursuit encore son déplacement suivant la direction A vers la droite sur la figure et le ressort 22 préalablement comprimé se détend et exerce une force de rappel qui tend à déplacer vers la droite le tube 2. Le tube 2 coulisse donc sur la tige 1 jusqu'à ce que l'épaulement 6 arrive en butée contre l'épaulement 12. La course du tube 2 le long de la tige 1 doit être réglée pour assurer une isolation électrique entre les doigts 5 et la borne conductrice 5'. Le mécanisme est maintenant prêt pour une opération de fermeture avec insertion de la résistance.4, the rod 1 continues to move along the direction A to the right in the figure and the spring 22 previously compressed relaxes and exerts a restoring force which tends to move the tube 2 to the right 2. The tube 2 therefore slides on the rod 1 until the shoulder 6 comes into abutment against the shoulder 12. The stroke of the tube 2 along the rod 1 must be adjusted to ensure electrical insulation between the fingers 5 and the conductive terminal 5 . The mechanism is now ready for a closing operation with insertion of the resistor.

Figure 5, lors d'une première phase de la manoeuvre de fermeture, la tige 1 est tirée vers la gauche sur la figure et entraîne dans la même direction le tube 2 par le jeu de l'épaulement 12 de la tige 1 qui vient en butée contre l'épaulement 6 du tube 2. Durant cette manoeuvre, les contacts d'arc du disjoncteur se rapprochent l'un de l'autre en même temps que les doigts 5 se rapprochent de la borne 5'. Quand l'arc électrique s'établit entre les contacts d'arc, la résistance est insérée du fait que le courant passe par la tige 1, les contacts glissants 3, le tube 2, les contacts glissants 21, le tube 19.5, during a first phase of the closing maneuver, the rod 1 is pulled to the left in the figure and drives in the same direction the tube 2 by the play of the shoulder 12 of the rod 1 which comes into abutment against the shoulder 6 of the tube 2. During this maneuver, the arcing contacts of the circuit breaker approach each other at the same time as the fingers 5 are approaching the terminal 5 '. When the electric arc is established between the arcing contacts, the resistor is inserted because the current passes through the rod 1, the sliding contacts 3, the tube 2, the sliding contacts 21, the tube 19.

Figure 6, le déplacement combiné de la tige 1 et du tube s'est poursuivi et les doigts 5 sont maintenant embrochés sur la borne 5' ce qui court-circuite la résistance puisque le courant passe maintenant par la tige 1, les contacts glissants 3, les doigts 5 et la borne 5'. Pendant ce déplacement combiné de la tige 1 et du tube 2, la bille 24 est restée fixe suivant la direction A, car verrouillée dans le trou 25 du tube fixe 19 et dans la gorge 13 de la tige 1. Comme visible sur la figure 6, pendant ce déplacement combiné de la tige 1 et du tube 2, le bord arrière de la gorge 13 constitué par l'extrémité en forme de congé de la pièce tubulaire 14 est resté fixe suivant la direction A , ce qui fait que le ressort 23 a été comprimé entre le fond de l'alésage 15 de la pièce tubulaire 14 et l'épaulement 16 de la tige 1.6, the combined movement of the rod 1 and the tube continued and the fingers 5 are now skewered on the terminal 5 'which bypasses the resistance since the current now passes through the rod 1, the sliding contacts 3 , the fingers 5 and the terminal 5 '. During this combined movement of the rod 1 and the tube 2, the ball 24 has remained fixed in the direction A, because locked in the hole 25 of the fixed tube 19 and in the groove 13 of the rod 1. As shown in Figure 6 during this combined movement of the rod 1 and the tube 2, the rear edge of the groove 13 constituted by the fillet-shaped end of the tubular piece 14 has remained fixed in the direction A, so that the spring 23 has been compressed between the bottom of the bore 15 of the tubular piece 14 and the shoulder 16 of the rod 1.

Figure 7, dès que la gorge 11 dans le tube 2 fait face au trou 25 dans le tube fixe 19, la bille 24 peut se dégager de la gorge 13 et s'escamoter à l'intérieur de la gorge 11, déverrouillant ainsi en déplacement la pièce tubulaire 14. Le ressort 23 préalablement comprimé peut donc se détendre et exercer une force de rappel qui entraîne en déplacement la pièce tubulaire 14 vers la gauche. La pièce tubulaire 14 coulisse par conséquent sous la bille 24 pour maintenir le tube 2 verrouillé en déplacement suivant la direction A de sorte que le mécanisme est prêt pour une nouvelle opération d'ouverture.7, as soon as the groove 11 in the tube 2 faces the hole 25 in the fixed tube 19, the ball 24 can disengage from the groove 13 and retract inside the groove 11, thus unlocking on the move the tubular part 14. The spring 23 previously compressed can therefore relax and exert a restoring force which causes the tubular piece 14 to move to the left. The tubular member 14 therefore slides under the ball 24 to maintain the tube 2 locked in displacement in the direction A so that the mechanism is ready for a new opening operation.

Claims (3)

  1. A mechanism for inserting a closure resistor for an electrical switch containing a semi-moving arcing contact mounted to be semi-movable in an axial direction (A) and secured to a metal rod (1) which extends in said direction between the arcing contact and the resistor, the mechanism comprising: a metal tube (2) coaxial with the rod and mounted to slide in electrical contact thereon, and having an end (5) that plugs onto a conductive plug (5') of the switch so as to short-circuit the resistor; and a spring (22) disposed between a first shoulder (12) provided on the rod and a second shoulder (9) provided on the tube so as to be compressed during a first stage of switch opening, and so as to exert a return force on the tube to displace it in said direction in order to separate it from said plug during a second stage of switch opening subsequent to the first stage, said mechanism being characterized in that it further comprises a system having at least one ball (24) which locks the tube so as to prevent it from being displaced in said direction during the first opening stage, and which retracts during the second opening stage so as to release said tube so that it can be displaced in said direction.
  2. The mechanism according to claim 1, in which mechanism the ball system comprises a first groove (11) provided in the tube, a first tubular piece (19) which is stationary in said direction and which is disposed coaxially with the tube between said tube and the rod, a hole (25) in said tubular piece, which hole faces the first groove when the switch is in the closed position, a ball (24) that engages in said groove and in the hole so as to lock the tube so as to prevent it from being displaced in said direction during the first opening stage, the ball system further comprising a second groove (13) which is provided in the rod and into which said ball retracts during the second opening stage.
  3. The mechanism according to claim 2, in which mechanism the second groove (13) provided in the rod has an edge that slides in said direction, which edge is constituted by a second tubular piece (14) coaxial with the rod and mounted to slide along the rod, a second spring (23) being disposed between a third shoulder (15) provided in said second tubular piece and a fourth shoulder (16) provided on the rod so as to be compressed during a first stage of switch closure until the first groove provided in the metal tube faces the hole provided in the first tubular piece, the return force exerted by said second spring serving to engage the ball in said hole in the first tubular piece and in said groove in the metal tube, and to displace said second tubular piece in the axial direction.
EP99402903A 1998-11-30 1999-11-23 Closing resistor insertion mechanism with ball lock retainer Expired - Lifetime EP1006547B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9815035A FR2786606B1 (en) 1998-11-30 1998-11-30 MECHANISM FOR INSERTING A CLOSING RESISTOR WITH A BALL LOCK
FR9815035 1998-11-30

Publications (2)

Publication Number Publication Date
EP1006547A1 EP1006547A1 (en) 2000-06-07
EP1006547B1 true EP1006547B1 (en) 2006-01-25

Family

ID=9533334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99402903A Expired - Lifetime EP1006547B1 (en) 1998-11-30 1999-11-23 Closing resistor insertion mechanism with ball lock retainer

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US (1) US6284993B1 (en)
EP (1) EP1006547B1 (en)
JP (1) JP2000173413A (en)
KR (1) KR20000035746A (en)
CN (1) CN1135585C (en)
BR (1) BR9907398A (en)
CA (1) CA2290850C (en)
DE (1) DE69929580T2 (en)
FR (1) FR2786606B1 (en)
TW (1) TW497111B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5179278B2 (en) * 2008-07-23 2013-04-10 三菱電機株式会社 Switch
FR2957451A1 (en) * 2010-03-09 2011-09-16 Areva T & D Sas HIGH VOLTAGE ELECTRIC SWITCH WITH CLOSURE RETURN AND DEVICE FOR INSERTING RESISTANCE
FR2984590B1 (en) * 2011-12-14 2014-07-04 Alstom Technology Ltd MOBILE CONDUCTOR ASSEMBLY FOR DISCONNECT, COMPRISING A SPRING FOR ACCELERATING THE SEPARATION OF ARC CONTACTS
CN103500930B (en) * 2013-10-10 2015-12-23 益和电气集团股份有限公司 A kind of secondary line backplate
CN115064327B (en) * 2022-06-15 2023-07-14 成都宏明电子股份有限公司 High-service-life high-precision multi-turn angular displacement potentiometer based on rolling friction

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4324959A (en) * 1978-10-16 1982-04-13 S&C Electric Company Pre-insertion resistor mechanism for a circuit interrupting device
FR2450501A1 (en) * 1979-03-02 1980-09-26 Alsthom Cgee CLOSING RESISTANCE INSERTION DEVICE OF A SWITCHING APPARATUS
FR2553926B1 (en) * 1983-10-24 1986-08-01 Merlin Gerin HIGH VOLTAGE CIRCUIT BREAKER WITH CLOSING RESISTORS

Also Published As

Publication number Publication date
FR2786606A1 (en) 2000-06-02
EP1006547A1 (en) 2000-06-07
CN1135585C (en) 2004-01-21
US6284993B1 (en) 2001-09-04
TW497111B (en) 2002-08-01
FR2786606B1 (en) 2001-01-05
CA2290850C (en) 2004-06-08
DE69929580T2 (en) 2006-11-09
BR9907398A (en) 2002-07-23
DE69929580D1 (en) 2006-04-13
CN1258922A (en) 2000-07-05
CA2290850A1 (en) 2000-05-30
JP2000173413A (en) 2000-06-23
KR20000035746A (en) 2000-06-26

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