EP0270389B1 - Gas insulated multiphase rotating switch - Google Patents

Gas insulated multiphase rotating switch Download PDF

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Publication number
EP0270389B1
EP0270389B1 EP87402251A EP87402251A EP0270389B1 EP 0270389 B1 EP0270389 B1 EP 0270389B1 EP 87402251 A EP87402251 A EP 87402251A EP 87402251 A EP87402251 A EP 87402251A EP 0270389 B1 EP0270389 B1 EP 0270389B1
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EP
European Patent Office
Prior art keywords
contact
rotary
blade
stationary
stationary contacts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87402251A
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German (de)
French (fr)
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EP0270389A1 (en
Inventor
Bernard Bouvet
Jacques Gaillard
Robert Volsy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT87402251T priority Critical patent/ATE79199T1/en
Publication of EP0270389A1 publication Critical patent/EP0270389A1/en
Application granted granted Critical
Publication of EP0270389B1 publication Critical patent/EP0270389B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/14—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch
    • H01H31/16—Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with angularly-movable bridging contact or contact-carrying member
    • 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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/003—Earthing switches
    • 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
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/886—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts by movement of rotating pistons

Definitions

  • the invention relates to a gas-insulated multipolar rotary switch, in particular for an electrical panel of a medium-voltage distribution station, having an insulating envelope filled with gas of high dielectric strength, and containing by pole a mounted double movable contact. on an insulating shaft, said movable contact being in the form of a knife with three positions cooperating in rotation with a plurality of fixed contacts staggered angularly in the same plane, along the internal wall of the envelope, to occupy a first closed position ensuring the electrical connection between an input terminal to which an incoming conductor is connected, and an output terminal to which an outgoing conductor is connected, a second open position ensuring separation between the two conductors and a third earthing position of one of the conductors.
  • Document EP-A-199,044 describes a three-position rotary switch comprising an insulating enclosure having three fixed contacts cooperating with a double movable contact in the form of a knife. In the open position, the movable contact does not come into engagement with the fixed contacts, and is isolated from the ground. The sectioning and ground ring functions are not fulfilled.
  • the switching shaft carries a compression fin, serving to support the knife of each pole.
  • the fin is made of insulating material.
  • the document FR-A-1,279,475 describes a medium-voltage cell with a three-phase rotary switch with air isolation, constituted by rotary bushings.
  • the movable contact is earthed in the intermediate open position, but the switch does not have a guard ring or a compression piston.
  • the document CH-390.346 relates to a high voltage disconnector for an armored substation. It has a rotary contact with two positions, with earthing of the movable contact in the open position. A metal plate is associated with the movable contact, but this plate does not act as a piston. Earthing of the phase conductors associated with the station's fixed contacts is excluded.
  • the object of the invention consists in making a rotary switch with gas isolation having a reduced bulk and good dielectric strength.
  • any operation on the equipment downstream of the switch for example the test of the feeder conductor, can thus be carried out safely, thanks to the presence of the metal screen grounded when the contact is in the second position.
  • the guard ring function is removed in the first closed position, because the screen is then isolated from the ground.
  • the screen In addition to its function as a guard ring, the screen also plays the role of a rotary piston for compressing the gas in piston chambers of the envelope.
  • the blowing means communicate with this chamber to ensure the extinction of the arc drawn between the contacts, when the knife passes from the first closed position to the second open position.
  • a pole of a rotary switch 10 for a switchboard of a three-phase medium voltage distribution station with gas isolation is housed in a cylindrical casing 12, filled with gas of high dielectric strength, in particular of sulfur hexafluoride SF 6.
  • the casing 12 is made of insulating material, and comprises on its internal periphery a series of five fixed contacts 14 to 22 carried by radial bushings.
  • the fixed contacts 14 to 22 are arranged in the transverse median plane of the casing 12 with a predetermined angular offset, and cooperate with a double movable contact 24 in the form of a rotary knife with three positions.
  • the first fixed contact 14 is connected externally to an incoming conductor 26, while the third fixed contact 18, diametrically opposite, is connected to a starting conductor 28.
  • the fourth and fifth fixed contacts 20, 22 are interconnected by a earth connection 30.
  • the second fixed contact 16, diametrically opposite to the fifth fixed contact 22, is located between the first and third fixed contacts 14, 18, and is connected to the starting conductor 28 by an electrical connection 32.
  • a longitudinal shaft 34 for driving in rotation the movable contact 24, is arranged coaxially inside the cylindrical envelope 12, and is made of insulating material.
  • the knife of the double movable contact 24 is secured to a metallic radial screen 36 extending orthogonally to the longitudinal shaft 34 and to the transverse median plane of the switch 10.
  • the screen 36 is fixed laterally to two electrodes 38, 40, annulars encircling the two opposite ends of the insulating shaft 34.
  • the movable contact knife 24 comprises a pair of parallel contact blades 24 a, 24 b, separated from each other by a predetermined axial interval l (see FIG. 5).
  • the two blades 24 a, 24 b, are elastically biased towards one another, and the presence of the interval l allows the elastic insertion of the two diametrically opposite zones of interruption of the knife with the fixed contacts 14 to 22 corresponding, during the rotation of the shaft 34 between the three positions.
  • the dimension of the metallic screen 36 in the diametrical direction may be less than that of the knife, so as to leave a radial clearance (see FIG. 3) between the internal wall of the envelope 12 and the edge of the screen 36.
  • the thickness of the radial clearance is generally less than 5 millimeters.
  • the casing 12 further comprises two fixed partitions 42, 44 cooperating with the movable assembly to form a device for compressing the insulating gas, contained in the two chambers (46 a, 46 b; 48 a, 48 b) which can be pistoned, formed in the interior volume of the envelope 12.
  • the compression device is associated with blowing means (not shown), intended to extinguish the arc drawn between the contacts, when the knife passes from one position to the other .
  • the actuation of the rotary shaft 34 in the trigonometric direction causes the opening of the switch by angular separation of the knife with the fixed contacts 14, 18.
  • the opening stroke of the movable contact 24 corresponds approximately to 60 degrees, and one of the knife contact zones comes into engagement with the fourth fixed contact 20 connected to the ground.
  • the mobile assembly forms, in this second open position, an integrated guard ring, composed of the metallic screen 36, the movable contact 24 and the two electrodes 38, 40.
  • the insertion of the metallic screen 36 on the leakage line between the input and output terminals of the switch 10 prevents any break in the insulation between these terminals, following a dangerous path along the internal wall of the insulating jacket 12, and the tree 34.
  • the test operation of the latter is carried out in the open position (FIG. 3) by injection of a test current on one of the fixed contacts 16 or 18, or on a special outlet of the outgoing conductor 28.
  • the cable test is thus carried out safely, when the screen 36 and the knife are connected to earth.
  • the metal screen 36 acts as a rotary gas compression piston in the chambers 46 a, 46 b; 48 a, 48 b.
  • the gas compression effect occurs in the two directions of rotation of the movable contact 24, and is advantageously used for blowing the arc drawn during the opening phase of the switch 10, after passing from the first position (figure 2) to the second position (figure 3).
  • the rotary switch 10 provides a sectioning function in the second open position, thanks to the presence of the screen 36 grounded, allowing to maintain correct insulation between the input and output terminals .
  • the guard ring function is eliminated in the first closed position (FIG. 2) of the rotary switch 10, because the screen 36 is isolated from the ground.
  • the insulating casing 12 of the rotary switch 10 comprises two end pieces 50, 52, of ends made of insulating material, allowing a reduction in the size of the metallic screen 36 in the longitudinal direction.
  • FIG. 7 shows the outright elimination of the screen 36, thanks to larger end pieces 50, 52, delimiting a narrow axial interval for the passage of the single movable contact 24 to two parallel blades.
  • the guard ring is then constituted by the movable contact 24 in the form of a knife.
  • the rotary gas compression piston is formed by a separate part from the metallic screen 36.
  • the invention has been described in relation to an envelope 12 containing a single switch pole, but it is clear that it applies to a three-phase switch in which the poles are aligned along the longitudinal axis of the shaft 34
  • the poles can be housed in a common insulating envelope, or in independent envelopes attached to each other.
  • the casing 12 of each pole of the rotary switch 10 is made of metallic material, the fixed contacts 14 to 22 then being supported by insulating bushings.
  • FIG. 8 shows an application of the invention in a medium-voltage distribution cell for a three-phase network enclosing a circuit breaker 60 having a first terminal connected to the busbar 62 by a first rotary switch 10 of the type described above, and a second terminal connected to the start 64 via a second rotary switch 10.
  • FIG. 9 represents another application of the invention in a cell for coupling two busbars 62, 66, elementary of a three-phase network RST, by means of a circuit breaker 60.
  • the first busbar 60 is connected to the circuit breaker 60 by a rotary switch 10
  • the second busbar 66 is connected to the circuit breaker by a second rotary switch 10 with three positions.
  • the two switches 10 have a structure identical to that described with reference to FIGS. 1 to 4.
  • FIG. 10 shows a plan view of FIGS. 8 and 9, in which the superposition of the rotary switches 10 of the three phases appears, in a vertical direction parallel to the alignment of the poles of the circuit breaker 60.
  • the grouping in column of the six poles d switches 10 on the same shaft line facilitates the mechanical control of the cell.
  • the invention also applies to an eccentric rotation switch of the movable knife.
  • the extinction of the arc drawn during the opening phase of the rotary switch can occur by means of a permanent magnet suitably positioned inside the envelope 12.
  • the action of the magnetic field of the magnet on the arc causes the latter to rotate and rapidly extinguish.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Circuit Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)

Abstract

Switch comprising, for each pole, a blade-shaped double moving contact (24) cooperating under rotation with a plurality of stationary contacts (14 - 22) in order to occupy a first closing position in which the first and third stationary contacts (14, 18) are interconnected by the blade, a second opening position in which the blade engages with a fourth stationary contact (20), and a third position for earthing the exit cable (28) thanks to the interconnecting of the second and fifth stationary contacts (16, 22) by means of the blade. The second and third stationary contacts (16, 18) are permanently joined together by an electrical connection (32). The same is true for the fourth and fifth stationary contacts (20, 22), thanks to an earth connection. The moving contact (24) is associated with a metal shield (36) advantageously arranged as a guard ring in the second opening position. The presence of this shield ensures an isolating function making it possible to retain the isolation between the input and output terminals (26, 28). Application: electrical panel for a medium-voltage distribution station. <IMAGE>

Description

L'invention est relative à un interrupteur rotatif multipolaire à isolement gazeux, notamment pour un tableau électrique d'un poste de distribution à moyenne tension, ayant une enveloppe isolante remplie de gaz à rigidité diélectrique élevée, et renfermant par pôle un contact mobile double monté sur un arbre isolant, ledit contact mobile étant en forme de couteau à trois positions coopérant à rotation avec une pluralité de contacts fixes échelonnés angulairement dans un même plan, le long de la paroi interne de l'enveloppe, pour occuper une première position de fermeture assurant la liaison électrique entre une borne d'entrée à laquelle est raccordé un conducteur d'arrivée, et une borne de sortie à laquelle est raccordé un conducteur de départ, une deuxième position d'ouverture assurant la séparation entre les deux conducteurs et une troisième position de mise à la terre de l'un des conducteurs.The invention relates to a gas-insulated multipolar rotary switch, in particular for an electrical panel of a medium-voltage distribution station, having an insulating envelope filled with gas of high dielectric strength, and containing by pole a mounted double movable contact. on an insulating shaft, said movable contact being in the form of a knife with three positions cooperating in rotation with a plurality of fixed contacts staggered angularly in the same plane, along the internal wall of the envelope, to occupy a first closed position ensuring the electrical connection between an input terminal to which an incoming conductor is connected, and an output terminal to which an outgoing conductor is connected, a second open position ensuring separation between the two conductors and a third earthing position of one of the conductors.

L'emploi d'une enveloppe isolante pour le logement de l'interrupteur rotatif à SF 6 pose le problème de l'isolement entre les bornes d'entrée et de sortie, étant donné le risque de cheminement le long de la paroi interne isolante. Pour éviter toute rupture d'isolement, il est possible de prendre deux mesures de prévention :

  • soit d'augmenter la ligne de fuite entre les bornes de l'interrupteur,
  • soit d'intercaler un anneau de masse sur la ligne de fuite.
The use of an insulating envelope for housing the rotary switch at SF 6 poses the problem of insulation between the input and output terminals, given the risk of routing along the insulating internal wall. To avoid any break in isolation, two preventive measures can be taken:
  • either to increase the creepage distance between the terminals of the switch,
  • either to insert a ground ring on the vanishing line.

L'augmentation de la ligne de fuite nécessite une grande dimension de l'enveloppe cylindrique, ce qui est souvent incompatible avec l'encombrement compact du tableau dans lequel l'interrupteur est intégré.The increase in the creepage distance requires a large dimension of the cylindrical envelope, which is often incompatible with the compact size of the switchboard in which the switch is integrated.

L'incorporation d'un anneau de masse à l'intérieur d'un interrupteur rotatif pose un problème de positionnement par rapport à la course en rotation du contact mobile. La présence permanente de cet anneau est de plus superflue en position de fermeture.The incorporation of a ground ring inside a rotary switch poses a problem of positioning by relative to the rotational travel of the movable contact. The permanent presence of this ring is also superfluous in the closed position.

Le document EP-A-199.044 décrit un interrupteur rotatif à trois positions comportant une enceinte isolante ayant trois contacts fixes coopérant avec un contact mobile double en forme de couteau. Dans la position d'ouverture, le contact mobile ne vient pas en engagement avec les contacts fixes, et est isolé de la terre. Les fonctions de sectionnement et d'anneau de masse ne sont pas remplies. L'arbre de commutation porte une ailette de compression, servant de support au couteau de chaque pôle. L'ailette est réalisée en matériau isolant.Document EP-A-199,044 describes a three-position rotary switch comprising an insulating enclosure having three fixed contacts cooperating with a double movable contact in the form of a knife. In the open position, the movable contact does not come into engagement with the fixed contacts, and is isolated from the ground. The sectioning and ground ring functions are not fulfilled. The switching shaft carries a compression fin, serving to support the knife of each pole. The fin is made of insulating material.

Le document FR-A-1.279.475 décrit une cellule moyenne tension à interrupteur rotatif triphasé à isolement dans l'air, constitué par des traversées tournantes. Le contact mobile est mis à la terre en position intermédiaire d'ouverture, mais l'interrupteur ne comporte pas d'anneau de garde, ni de piston de compression.The document FR-A-1,279,475 describes a medium-voltage cell with a three-phase rotary switch with air isolation, constituted by rotary bushings. The movable contact is earthed in the intermediate open position, but the switch does not have a guard ring or a compression piston.

Le document CH-390.346 se rapporte à un sectionneur à haute tension pour un poste blindé. Il comporte un contact rotatif à deux positions, avec mise à la terre du contact mobile dans la position d'ouverture. Une plaque métallique est associée au contact mobile, mais cette plaque ne joue pas le rôle de piston. Une mise à la terre des conducteurs de phase associés aux contacts fixes du poste est exclue.The document CH-390.346 relates to a high voltage disconnector for an armored substation. It has a rotary contact with two positions, with earthing of the movable contact in the open position. A metal plate is associated with the movable contact, but this plate does not act as a piston. Earthing of the phase conductors associated with the station's fixed contacts is excluded.

L'objet de l'invention consiste à réaliser un interrupteur rotatif à isolement gazeux ayant un encombrement réduit et une bonne tenue diélectrique.The object of the invention consists in making a rotary switch with gas isolation having a reduced bulk and good dielectric strength.

L'interrupteur selon l'invention est caractérisé en ce que:

  • le contact mobile vient en engagement dans la deuxième position d'ouverture avec un contact fixe relié en permanence à la terre, de manière à assurer une fonction de sectionnement permettant de conserver l'isolement entre les bornes d'entrée et de sortie,
  • un écran métallique est solidarisé au contact mobile pour former l'équipage mobile rotatif avec l'arbre de commande, ledit écran étant agencé en anneau de garde dans ladite deuxième position d'ouvertuere,
  • au moins une cloison fixe s'étendant entre l'enveloppe et l'arbre, coopère avec l'écran métallique jouant le rôle d'un piston rotatif de compression du gaz, pour former au moins une chambre pistonnable associée à des moyens de soufflage de l'arc.
The switch according to the invention is characterized in that:
  • the movable contact comes into engagement in the second opening position with a fixed contact permanently connected to earth, so as to provide a sectioning function allowing the insulation between the input and output terminals to be preserved,
  • a metal screen is secured to the movable contact to form the rotary movable assembly with the control shaft, said screen being arranged in a guard ring in said second open position,
  • at least one fixed partition extending between the casing and the shaft, cooperates with the metal screen playing the role of a rotary piston for compressing the gas, to form at least one pistonable chamber associated with blowing means of the arc.

Toute opération sur les matériels en aval de l'interrupteur, par exemple le test du conducteur de départ, peut ainsi être effectuée en toute sécurité, grâce à la présence de l'écran métallique mis à la terre lorsque le contact se trouve dans la deuxième position. La fonction d'anneau de garde est supprimée dans la première position de fermeture, car l'écran est alors isolé de la terre.Any operation on the equipment downstream of the switch, for example the test of the feeder conductor, can thus be carried out safely, thanks to the presence of the metal screen grounded when the contact is in the second position. The guard ring function is removed in the first closed position, because the screen is then isolated from the ground.

En plus de sa fonction d'anneau de garde, l'écran joue également le rôle de piston rotatif de compression du gaz dans des chambres pistonnables de l'enveloppe. Les moyens de soufflage communiquent avec cette chambre pour assurer l'extinction de l'arc tiré entre les contacts, lorsque le couteau passe de la première position de fermeture à la deuxième position d'ouverture.In addition to its function as a guard ring, the screen also plays the role of a rotary piston for compressing the gas in piston chambers of the envelope. The blowing means communicate with this chamber to ensure the extinction of the arc drawn between the contacts, when the knife passes from the first closed position to the second open position.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple et représenté au dessin annexé dans lequel :

  • la figure 1 est une vue schématique en perspective d'un interrupteur rotatif selon l'invention;
  • les figures 2 à 4 représentent des vues en coupes transversales de la figure 1, respectivement en position de fermeture, d'ouverture et de terre de l'interrupteur;
  • la figure 5 est une vue en coupe selon la ligne V-V de la figure 1;
  • les figures 6 et 7 montrent des vues identiques à la figure 5 de deux variantes de réalisations.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of example. and shown in the accompanying drawing in which:
  • Figure 1 is a schematic perspective view of a rotary switch according to the invention;
  • Figures 2 to 4 show cross-sectional views of Figure 1, respectively in the closed, open and earth position of the switch;
  • Figure 5 is a sectional view along line VV of Figure 1;
  • Figures 6 and 7 show views identical to Figure 5 of two alternative embodiments.

Sur les figures, un pôle d'un interrupteur 10 rotatif pour un tableau d'un poste triphasé de distribution à moyenne tension et à isolement gazeux, est logé dans une enveloppe 12 cylindrique, remplie de gaz à rigidité diélectrique élevée, notamment de l'hexafluorure de soufre SF 6.In the figures, a pole of a rotary switch 10 for a switchboard of a three-phase medium voltage distribution station with gas isolation, is housed in a cylindrical casing 12, filled with gas of high dielectric strength, in particular of sulfur hexafluoride SF 6.

L'enveloppe 12 est réalisée en matériau isolant, et comprend sur sa périphérie interne une série de cinq contacts fixes 14 à 22 portés par des traversées radiales. Les contacts fixes 14 à 22 sont disposés dans le plan médian transversal de l'enveloppe 12 avec un décalage angulaire prédéterminé, et coopèrent avec un contact mobile 24 double en forme de couteau rotatif à trois positions. Le premier contact fixe 14 est connecté extérieurement à un conducteur d'arrivée 26, tandis que le troisième contact fixe 18, diamétralement opposée, est relié à un conducteur de départ 28. Les quatrième et cinquième contacts fixes 20, 22, sont interconnectés par une liaison 30 de terre. Le deuxième contact fixe 16, diamétralement opposé au cinquième contact fixe 22, est situé entre les premier et troisième contacts fixes 14, 18, et est relié au conducteur de départ 28 par une liaison électrique 32.The casing 12 is made of insulating material, and comprises on its internal periphery a series of five fixed contacts 14 to 22 carried by radial bushings. The fixed contacts 14 to 22 are arranged in the transverse median plane of the casing 12 with a predetermined angular offset, and cooperate with a double movable contact 24 in the form of a rotary knife with three positions. The first fixed contact 14 is connected externally to an incoming conductor 26, while the third fixed contact 18, diametrically opposite, is connected to a starting conductor 28. The fourth and fifth fixed contacts 20, 22 are interconnected by a earth connection 30. The second fixed contact 16, diametrically opposite to the fifth fixed contact 22, is located between the first and third fixed contacts 14, 18, and is connected to the starting conductor 28 by an electrical connection 32.

Un arbre 34 longitudinal d'entraînement en rotation du contact mobile 24, est agencé coaxialement à l'intérieur de l'enveloppe 12 cylindrique, et est réalisé en matériau isolant. Le couteau du contact mobile 24 double est solidarisé à un écran 36 métallique radial s'étendant orthogonalement à l'arbre 34 longitudinal et au plan médian transversal de l'interrupteur 10. L'écran 36 est fixé latéralement à deux électrodes 38, 40, annulaires encerclant les deux extrémités opposées de l'arbre 34 isolant.A longitudinal shaft 34 for driving in rotation the movable contact 24, is arranged coaxially inside the cylindrical envelope 12, and is made of insulating material. The knife of the double movable contact 24 is secured to a metallic radial screen 36 extending orthogonally to the longitudinal shaft 34 and to the transverse median plane of the switch 10. The screen 36 is fixed laterally to two electrodes 38, 40, annulars encircling the two opposite ends of the insulating shaft 34.

Le couteau du contact mobile 24 comporte une paire de lames de contact 24 a, 24 b parallèles, séparées l'une de l'autre par un intervalle l axial prédéterminé (voir figure 5). Les deux lames 24 a, 24 b, sont sollicitées élastiquement l'une vers l'autre, et la présence de l'intervalle l autorise l'insertion élastique des deux zones d'interruption diamétralement opposées du couteau avec les contacts fixes 14 à 22 correspondantes, lors de la rotation de l'arbre 34 entre les trois positions.The movable contact knife 24 comprises a pair of parallel contact blades 24 a, 24 b, separated from each other by a predetermined axial interval l (see FIG. 5). The two blades 24 a, 24 b, are elastically biased towards one another, and the presence of the interval l allows the elastic insertion of the two diametrically opposite zones of interruption of the knife with the fixed contacts 14 to 22 corresponding, during the rotation of the shaft 34 between the three positions.

La dimension de l'écran 36 métallique dans le sens diamétral peut être inférieure à celle du couteau, de manière à ménager un jeu radial (voir figure 3) entre la paroi interne de l'enveloppe 12 et le bord de l'écran 36. L'épaisseur du jeu radial est généralement inférieure à 5 millimètres.The dimension of the metallic screen 36 in the diametrical direction may be less than that of the knife, so as to leave a radial clearance (see FIG. 3) between the internal wall of the envelope 12 and the edge of the screen 36. The thickness of the radial clearance is generally less than 5 millimeters.

L'enveloppe 12 comporte en plus deux cloisons 42, 44, fixes coopérant avec l'équipage mobile pour former un dispositif de compression du gaz isolant, contenu dans les deux chambres (46 a, 46 b ; 48 a, 48 b) pistonnables, ménagées dans le volume intérieur de l'enveloppe 12. Le dispositif de compression est associé à des moyens de soufflage (non représentés), destinés à éteindre l'arc tiré entre les contacts, lorsque le couteau passe d'une position à l'autre.The casing 12 further comprises two fixed partitions 42, 44 cooperating with the movable assembly to form a device for compressing the insulating gas, contained in the two chambers (46 a, 46 b; 48 a, 48 b) which can be pistoned, formed in the interior volume of the envelope 12. The compression device is associated with blowing means (not shown), intended to extinguish the arc drawn between the contacts, when the knife passes from one position to the other .

Le fonctionnement de l'interrupteur 10 rotatif est illustré sur les figures 2 à 4, qui montrent les différentes positions de commutation :

  • Dans la première position de fermeture (figure 2), le couteau du contact mobile 24 forme un pont entre les premier et troisième contacts fixes 14, 18, pour assurer la liaison entre le conducteur d'arrivée 26 et le conducteur de départ 28. Les contacts fixes 14, 18, constituent les bornes d'entrée et de sortie de l'interrupteur.
The operation of the rotary switch 10 is illustrated in FIGS. 2 to 4, which show the different switching positions:
  • In the first closed position (FIG. 2), the knife of the movable contact 24 forms a bridge between the first and third fixed contacts 14, 18, to ensure the connection between the incoming conductor 26 and the outgoing conductor 28. The fixed contacts 14, 18 constitute the input and output terminals of the switch.

L'actionnement de l'arbre 34 rotatif dans le sens trigonométrique (flèche f, figure 3) provoque l'ouverture de l'interrupteur par séparation angulaire du couteau avec les contacts fixes 14, 18. La course d'ouverture du contact mobile 24 correspond environ à 60 degrés, et l'une des zones de contacts du couteau vient en engagement avec le quatrième contact fixe 20 relié à la terre. L'équipage mobile forme, dans cette deuxième position d'ouverture, un anneau de garde intégré, composé de l'écran 36 métallique, du contact mobile 24 et des deux électrodes 38, 40. L'insertion de l'écran 36 métallique sur la ligne de fuite entre les bornes d'entrée et de sortie de l'interrupteur 10 évite toute rupture d'isolement entre ces bornes, suite à un cheminement dangereux le long de la paroi interne de l'enveloppe isolante 12, et de l'arbre 34.The actuation of the rotary shaft 34 in the trigonometric direction (arrow f, Figure 3) causes the opening of the switch by angular separation of the knife with the fixed contacts 14, 18. The opening stroke of the movable contact 24 corresponds approximately to 60 degrees, and one of the knife contact zones comes into engagement with the fourth fixed contact 20 connected to the ground. The mobile assembly forms, in this second open position, an integrated guard ring, composed of the metallic screen 36, the movable contact 24 and the two electrodes 38, 40. The insertion of the metallic screen 36 on the leakage line between the input and output terminals of the switch 10 prevents any break in the insulation between these terminals, following a dangerous path along the internal wall of the insulating jacket 12, and the tree 34.

Dans le cas où le conducteur de départ 28 est constitué par un câble, l'opération de test de ce dernier est effectuée en position d'ouverture (figure 3) par injection d'un courant d'essai sur l'un des contacts fixes 16 ou 18, ou sur une prise spéciale du conducteur de départ 28. Le test du câble est ainsi effectué en toute sécurité, lorsque l'écran 36 et le couteau se trouvent raccordés à la terre.In the case where the outgoing conductor 28 is constituted by a cable, the test operation of the latter is carried out in the open position (FIG. 3) by injection of a test current on one of the fixed contacts 16 or 18, or on a special outlet of the outgoing conductor 28. The cable test is thus carried out safely, when the screen 36 and the knife are connected to earth.

Le passage de la deuxième position d'ouverture (figure 3) vers la troisième position de terre (figure 4) s'opère par la rotation poursuivie de l'arbre 34 dans le sens de la flèche f. Le couteau se trouve en engagement avec les deuxième et cinquième contacts fixes 16, 22, et le conducteur de départ 28 est branché à la terre.The passage from the second open position (Figure 3) to the third earth position (Figure 4) takes place by the continued rotation of the shaft 34 in the direction of the arrow f. The knife is in engagement with the second and fifth fixed contacts 16, 22, and the starting conductor 28 is connected to the ground.

A partir de la troisième position, la refermeture de l'interrupteur 10 vers la première position (figure 2) s'effectue en sens inverse de la flèche f, après passage par la deuxième position d'ouverture.From the third position, the closing of the switch 10 to the first position (Figure 2) is carried out in the opposite direction to the arrow f, after passing through the second open position.

En plus de sa fonction d'anneau de garde, en position d'ouverture, l'écran 36 métallique joue le rôle de piston rotatif de compression du gaz dans les chambres 46 a, 46 b ; 48 a, 48 b. L'effet de compression du gaz intervient dans les deux sens de rotation du contact mobile 24, et est avantageusement utilisé pour le soufflage de l'arc tiré lors de la phase d'ouverture de l'interrupteur 10, après pasage de la première position (figure 2) vers la deuxième position (figure 3).In addition to its guard ring function, in the open position, the metal screen 36 acts as a rotary gas compression piston in the chambers 46 a, 46 b; 48 a, 48 b. The gas compression effect occurs in the two directions of rotation of the movable contact 24, and is advantageously used for blowing the arc drawn during the opening phase of the switch 10, after passing from the first position (figure 2) to the second position (figure 3).

On remarque que l'interrupteur 10 rotatif assure une fonction de sectionnement dans la deuxième position d'ouverture, grâce à la présence de l'écran 36 mis à la terre, permettant de conserver un isolement correct entre les bornes d'entrée et de sortie. La fonction d'anneau de garde est supprimée dans la première position de fermeture (figure 2) de l'interrupteur 10 rotatif, car l'écran 36 est isolé de la terre.Note that the rotary switch 10 provides a sectioning function in the second open position, thanks to the presence of the screen 36 grounded, allowing to maintain correct insulation between the input and output terminals . The guard ring function is eliminated in the first closed position (FIG. 2) of the rotary switch 10, because the screen 36 is isolated from the ground.

Selon la variante de la figure 6, l'enveloppe 12 isolante de l'interrupteur 10 rotatif comporte deux embouts 50, 52, d'extrémités en matériau isolant, permettant une réduction de la dimension de l'écran 36 métallique dans la direction longitudinale.According to the variant of FIG. 6, the insulating casing 12 of the rotary switch 10 comprises two end pieces 50, 52, of ends made of insulating material, allowing a reduction in the size of the metallic screen 36 in the longitudinal direction.

La figure 7 montre la suppression pure et simple de l'écran 36, grâce à des embouts 50, 52, plus importants, délimitant un intervalle axial étroit pour le passage du seul contact mobile 24 à deux lames parallèles. L'anneau de garde est alors constitué par le contact mobile 24 en forme de couteau.FIG. 7 shows the outright elimination of the screen 36, thanks to larger end pieces 50, 52, delimiting a narrow axial interval for the passage of the single movable contact 24 to two parallel blades. The guard ring is then constituted by the movable contact 24 in the form of a knife.

Selon une autre variante (non représentée), le piston rotatif de compression du gaz est formé par une pièce distincte de l'écran 36 métallique.According to another variant (not shown), the rotary gas compression piston is formed by a separate part from the metallic screen 36.

L'invention a été décrite en relation avec une enveloppe 12 contenant un seul pôle d'interrupteur, mais il est clair qu'elle s'applique à un interrupteur triphasé dans lequel les pôles sont alignés selon l'axe longitudinal de l'arbre 34. Les pôles peuvent être logés dans une enveloppe isolante commune, ou dans des enveloppes indépendantes accolées les unes aux autres.The invention has been described in relation to an envelope 12 containing a single switch pole, but it is clear that it applies to a three-phase switch in which the poles are aligned along the longitudinal axis of the shaft 34 The poles can be housed in a common insulating envelope, or in independent envelopes attached to each other.

Selon une autre variante, l'enveloppe 12 de chaque pôle de l'interrupteur 10 rotatif est réalisée en matériau métallique, les contacts fixes 14 à 22 étant alors supportés par des traversées isolantes.According to another variant, the casing 12 of each pole of the rotary switch 10 is made of metallic material, the fixed contacts 14 to 22 then being supported by insulating bushings.

La figure 8 montre une application de l'invention dans une cellule de distribution à moyenne tension pour réseau triphasé renfermant un disjoncteur 60 ayant une première borne raccordée au jeu de barres 62 par un premier interrupteur 10 rotatif du type décrit précédemment, et une deuxième borne connectée au départ 64 par l'intermédiaire d'un deuxième interrupteur 10 rotatif.FIG. 8 shows an application of the invention in a medium-voltage distribution cell for a three-phase network enclosing a circuit breaker 60 having a first terminal connected to the busbar 62 by a first rotary switch 10 of the type described above, and a second terminal connected to the start 64 via a second rotary switch 10.

La figure 9 représente une autre application de l'invention dans une cellule de couplage de deux jeux de barres 62, 66, élémentaires d'un réseau triphasé RST, aun moyen d'un disjoncteur 60. Le premier jeu de barres 60 est connecté au disjoncteur 60 par un interrupteur 10 rotatif, et le deuxième jeu de barres 66 est relié au disjoncteur par un deuxième interrupteur 10 rotatif à trois positions. Les deux interrupteurs 10 ont une structure identique à celle décrite en référence aux figures 1 à 4.FIG. 9 represents another application of the invention in a cell for coupling two busbars 62, 66, elementary of a three-phase network RST, by means of a circuit breaker 60. The first busbar 60 is connected to the circuit breaker 60 by a rotary switch 10, and the second busbar 66 is connected to the circuit breaker by a second rotary switch 10 with three positions. The two switches 10 have a structure identical to that described with reference to FIGS. 1 to 4.

La figure 10 montre une vue en plan des figures 8 et 9, dans laquelle apparaît la superposition des interrupteurs 10 rotatifs des trois phases, selon une direction verticale parallèle à l'alignement des pôles du disjoncteur 60. Le regroupement en colonne des six pôles d'interrupteurs 10 sur une même ligne d'arbre facilite la commande mécanique de la cellule.FIG. 10 shows a plan view of FIGS. 8 and 9, in which the superposition of the rotary switches 10 of the three phases appears, in a vertical direction parallel to the alignment of the poles of the circuit breaker 60. The grouping in column of the six poles d switches 10 on the same shaft line facilitates the mechanical control of the cell.

L'invention s'applique également à un interrupteur à rotation excentrée du couteau mobile.The invention also applies to an eccentric rotation switch of the movable knife.

Selon une autre variante, l'extinction de l'arc tiré lors de la phase d'ouverture de l'interrupteur rotatif peut intervenir au moyen d'un aimant permanent convenablement positionné à l'intérieur de l'enveloppe 12. L'action du champ magnétique de l'aimant sur l'arc provoque la rotation et l'extinction rapide de ce dernier.According to another variant, the extinction of the arc drawn during the opening phase of the rotary switch can occur by means of a permanent magnet suitably positioned inside the envelope 12. The action of the magnetic field of the magnet on the arc causes the latter to rotate and rapidly extinguish.

Claims (3)

  1. A gas-insulated multipole rotary switch (10), notably for an electrical switchboard of a medium voltage distribution substation, having an insulating enclosure (12) filled with high dielectric strength gas, and housing per pole a double movable contact (24), mounted on an insulating shaft (34), said movable contact being in the form of a three-position blade cooperating in rotation with a plurality of stationary contacts (14 to 22) angularly staggered in a single plane, along the inside wall of the enclosure (12) to occupy a first closed position ensuring electrical connection between an input terminal to which an incoming conductor (26) is connected, and an output terminal to which an outgoing conductor (28) is connected, a second open position in which the two conductors (26, 28) are separated and a third position in which one (28) of the conductors is earthed,
    characterized in that :
    - the movable contact (24) comes into engagement in the second open position with a stationary contact (20) permanently earthed so as to perform a disconnecting function enabling insulation between the input and output terminals to be preserved,
    - a metal shield (36) is fixedly secured to the movable contact (24) to form the rotary movable assembly with the operating shaft (34), said shield being arranged as a guard ring in said second open position,
    - at least one fixed partition (42, 44) extending between the enclosure (12) and the shaft (34) cooperates with the metal shield (36) acting as a rotary gas compression piston, to form at least one puffer chamber (46a, 46b, 48a, 48b) associated with means for extinguishing the arc.
  2. A rotary switch according to claim 1, characterized in that the input terminal of the rotary switch (10) is formed by an external extension of a first stationary contact (14) diametrically opposite to a third stationary contact (18) externally connected to the output terminal, that a second stationary contact (16) located between the first and third stationary contacts (14, 18) is diametrically opposite an earthed fifth stationary contact (22), and that a fourth stationary contact (20) cooperating with the rotary blade in the second open position, is located between the third and fifth stationary contacts (18, 22).
  3. The rotary switch according to claim 1 or 2, characterized in that the metal shield (36) comprises a radial plane surface, disposed on each side of the blade and extending at right angles to the longitudinal shaft (34), and to the transverse mid-plane of the pole of the switch (10) and that the opposite ends of the insulating shaft (34) are encircled by two annular electrodes (38, 40) fixed to the metal shield (36).
EP87402251A 1986-11-03 1987-10-09 Gas insulated multiphase rotating switch Expired - Lifetime EP0270389B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87402251T ATE79199T1 (en) 1986-11-03 1987-10-09 GAS INSULATED MULTIPOLE ROTARY SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8615375 1986-11-03
FR8615375A FR2606209B1 (en) 1986-11-03 1986-11-03 MULTIPOLAR ROTARY SWITCH WITH GAS INSULATION

Publications (2)

Publication Number Publication Date
EP0270389A1 EP0270389A1 (en) 1988-06-08
EP0270389B1 true EP0270389B1 (en) 1992-08-05

Family

ID=9340525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87402251A Expired - Lifetime EP0270389B1 (en) 1986-11-03 1987-10-09 Gas insulated multiphase rotating switch

Country Status (5)

Country Link
EP (1) EP0270389B1 (en)
AT (1) ATE79199T1 (en)
DE (1) DE3780921T2 (en)
ES (1) ES2035099T3 (en)
FR (1) FR2606209B1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2660109B1 (en) * 1990-03-23 1992-06-05 Merlin Gerin CONTROL MECHANISM OF A THREE-POSITION SWITCH.
US5153399A (en) * 1990-11-06 1992-10-06 G&W Electric Company Rotary puffer switch
DE4117057A1 (en) * 1991-05-23 1992-11-26 Siemens Ag MULTI-POSITION ROTARY SWITCH WORKING WITH LOESCHGAS
ES2076100B1 (en) * 1993-08-03 1997-10-01 Iberica De Aparellajes S L IMPROVEMENTS IN MULTIPLE SWITCHES FOR ELECTRIC POWER DISTRIBUTION CELLS
SE515106C2 (en) * 1994-11-28 2001-06-11 Abb Ab Electric coupler for providing a quick short circuit and use of such an electric coupler
CN103117187A (en) * 2012-11-23 2013-05-22 李继华 Single-pole double throw rotation type indoor high-voltage isolating switch
ES1229781Y (en) 2019-04-26 2019-08-12 Ormazabal Y Cia S L U Gas cutting switch
CN110233081A (en) * 2019-07-11 2019-09-13 广东电网有限责任公司 Rotary high-voltage isolating switch
CN111524744B (en) * 2020-05-27 2023-03-31 库柏爱迪生(平顶山)电子科技有限公司 Arc extinguishing nozzle and load switch with same
CN112530730B (en) * 2020-11-30 2023-04-28 海南电网有限责任公司东方供电局 Wire-distribution overhead line isolating switch
FR3138559B1 (en) 2022-07-26 2024-06-28 Socomec Sa Electrical cut-off module with dielectric barrier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130494B (en) * 1959-04-10 1962-05-30 Siemens Ag Metal-encapsulated high-voltage disconnector with inner insulating material and earthing means between the fixed contacts
FR1279475A (en) * 1960-11-10 1961-12-22 Comp Generale Electricite Prefabricated cubicle with multi-pole rotary switch
DE3515203A1 (en) * 1985-04-26 1986-10-30 Concordia Sprecher-Schaltgeräte GmbH, 7024 Filderstadt ENCLOSED LOAD SWITCH

Also Published As

Publication number Publication date
DE3780921D1 (en) 1992-09-10
EP0270389A1 (en) 1988-06-08
DE3780921T2 (en) 1993-03-25
ATE79199T1 (en) 1992-08-15
FR2606209B1 (en) 1994-05-20
FR2606209A1 (en) 1988-05-06
ES2035099T3 (en) 1993-04-16

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