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EP0485306A1 - Multiphase rotating switch - Google Patents

Multiphase rotating switch Download PDF

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Publication number
EP0485306A1
EP0485306A1 EP91420366A EP91420366A EP0485306A1 EP 0485306 A1 EP0485306 A1 EP 0485306A1 EP 91420366 A EP91420366 A EP 91420366A EP 91420366 A EP91420366 A EP 91420366A EP 0485306 A1 EP0485306 A1 EP 0485306A1
Authority
EP
European Patent Office
Prior art keywords
contact
fixed
envelope
rotary switch
blades
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.)
Granted
Application number
EP91420366A
Other languages
German (de)
French (fr)
Other versions
EP0485306B1 (en
Inventor
Mauro Merlin Gerin Begnis
Bernard Merlin Gerin Bouvet
André Merlin Gerin Colella
Jacques Merlin Gerin Gaillard
Richard Merlin Gerin Jacolin
Serge Merlin Gerin Pons
Gérard Merlin Gerin Riva
Claude Merlin Gerin Pinet
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.)
Schneider Electric SE
Original Assignee
Merlin Gerin SA
Schneider Electric SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merlin Gerin SA, Schneider Electric SE filed Critical Merlin Gerin SA
Publication of EP0485306A1 publication Critical patent/EP0485306A1/en
Application granted granted Critical
Publication of EP0485306B1 publication Critical patent/EP0485306B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/48—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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • H01H1/2041—Rotating bridge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • 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
    • 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

Definitions

  • the invention relates to a medium-voltage multipolar rotary switch with a sealed envelope of revolution, filled with a gas of high dielectric strength, the internal periphery of which carries by pole a fixed input contact, a fixed output contact and a contact fixed earthing, which are angularly spaced and which cooperate with a contact bridge in the form of a pivoting knife, carried by a rotary control shaft which extends in the axis of the envelope, the different poles being staggered along said tree inside the envelope, and separated by transverse walls of longitudinal subdivision of the envelope, said tree being able to occupy selectively three positions; an open position, a closed position in which the contact bridge connects said input and output contacts, and a grounding position, in which said contact bridge connects said output and connection contacts Earth.
  • the object of the invention is to increase the contact force in the closed position, and to avoid repulsion at the clamps.
  • the switch according to the invention is characterized in that the two contact blades of said knife are arranged in parallel and are equipped with divergent ends to form at each end a movable contact clamp coming in the closed position enclosing the associated fixed contact which is arranged in contact area, that the two blades are elastically biased against each other, the approximation being limited, when the clamps are released from the fixed contacts by stops framing the central part of each blade, and when said central parts are in the engaged position of the clamps, with small spacing so as to be the seat of electrodynamic forces of significant attraction when they are traversed by the current, this spacing being greater than the deflection generated by said forces to avoid coming into contact with the central parts of the two blades.
  • the approximating electrodynamic forces are thus used to reinforce the contact pressure.
  • the central parts of the blades have a notch of sufficient depth to prevent any coming into contact during a deflection of the blades.
  • the depth of this notch is a few tenths of a millimeter, which makes it possible to conserve significant electrodynamic forces due to the small spacing of the central parts of the blades.
  • the envelope advantageously includes a weakened zone, which constitutes a preferential burst zone in the event of accidental overpressure inside the envelope.
  • This weakened zone is obtained by a reduction in the thickness of the envelope, in this case in the zone of junction of one of the bottoms with the wall of revolution.
  • Figure 1 is a schematic elevational view partially in axial section of a switch according to the invention, shown in the closed position.
  • Figures 2,3 and 4 are sections along line 2-2 of Figure 1 showing the switch respectively in position closed, open and grounded.
  • Figure 5 is a partial view on an enlarged scale of the knife according to Figure 1, shown in the open position.
  • Figure 6 is a view similar to that of Figure 5 showing the knife in the closed position.
  • the medium-voltage three-pole rotary switch comprises a sealed envelope 10, consisting of a tank 11 and a cover 12 of molded plastic, assembled along a joint plane 13.
  • the sealed envelope 10 of general shape cylindrical is subdivided into three compartments, by two transverse walls 14, and the assembly is filled with a gas with high dielectric strength such as sulfur hexafluoride, at atmospheric pressure or under overpressure.
  • the three poles R, S, T of the switch, each housed in one of the switch compartments, are identical, and only one of them is described in detail below.
  • Each pole has a fixed input contact 15, a fixed output contact 16 and a fixed earthing contact 17.
  • These fixed contacts 15,16,17 are arranged on the internal face of the casing 10 and constitute sealed crossings of the casing 10.
  • the fixed output contact 16 comprises a contact pad 18 diametrically opposite the contact pad 19 of the fixed input contact 15, and a fixed contact pad 20 diametrically opposite the fixed contact pad 21 of the earthing contact 17.
  • a movable contact bridge in the form of a rotary knife 22 is carried by a control shaft 23, extending in the axis of the casing 10 and one of the ends 24 of which crosses , in a sealed manner the casing 10, to cooperate with an external control mechanism (not shown).
  • Each knife 22 consists of two blades 25, 26 arranged in parallel, and having divergent ends to form movable contact clamps 27.28 each cooperating with one of the fixed contacts 15,16,17.
  • the fixed input contact 15 is disposed in the bottom of the cover 12, and the latter carries an insulating partition 29, advantageously coming from molding, and extending substantially perpendicular to the joint plane 13, being interposed between the fixed input contact 15 and the grounding contact 17.
  • the insulating partition 29 is adjacent to the fixed input contact 15 and it extends to the periphery of the shaft. control 23, so as to limit the risks of bypass and initiation on the stud 21 of the earthing contact 17.
  • the partition 29 advantageously extends over the entire length of the compartment and its arrangement, next to the fixed contact inlet 15 does not hamper the rotation of the knife 22.
  • openings 36 In the junction zone of the partition 29 and the transverse walls 14 of the compartment are formed openings 36, in the form of notches adjacent to the shaft 23, to allow internal circulation of gases and therefore regenerating the dielectric withstand in the area of the grounding contact pad 17.
  • the envelope 10 advantageously includes a weakened bursting zone 30 in the event of an internal overpressure in the envelope 10.
  • This weakened zone is arranged in the connection zone of the cylindrical envelope 10, and of one of the bottoms 31, by being constituted by a simple groove reducing the thickness of the envelope.
  • This weakened zone 30 is preferably at in the vicinity of the fixed output contact 16, and it allows gases to escape to areas remote from the other poles.
  • FIGS. 1.5 and 6 it can be seen that the contact blades 25, 26 are urged against one another, by springs 32.
  • the bringing together of the blades 25, 26 is limited by stops 33 which frame the central part 34 of the blades 25, 26.
  • the clamps 27, 28 thus remain sufficiently open to engage the ranges of the fixed contacts during a closing movement.
  • the central parts 34 have a notch which confines a slot 35 for spacing the central parts of the blades 25, 26.
  • the width of this slot 35 is a few tenths of a millimeter and can reach one millimeter.
  • the clamps 27, 28 engage on the fixed contacts 15, 16 which force them apart against the force of the springs 32. It is clear that when the blades 25, 26 are traversed by the current flowing between the fixed input and output contacts 15, 16, these blades 25, 26 are subjected to approximating electrodynamic forces which participate in the contact pressure, and limit the risk of repulsion from these contacts.
  • the width of the slot 35 is chosen to be large enough to avoid any contact between the central parts 34 of the bent blades 25, 26. This absence of abutment keeps intact the contact force generated by the electrodynamic forces of attraction between the blades 25,26. These electrodynamic forces of attraction are slightly weaker than in the absence of a notch, but this reduction is acceptable.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

A multipole rotary switch with enclosure (10) made of a moulded insulating material, carrying on its internal periphery fixed input and output contacts (15, 16) and a fixed earthing contact (17), includes an insulating partition (29) interposed between the input contact (15) and the earthing contact (17). A control shaft carries the knife-shaped contact bridges consisting of two blades extending parallel to one another, and the ends of which are configured as pliers. The contact blades include in their central part a notch which prevents any contacting during a bending, and thereby any cancelling out of the attractive effect due to the electrodynamic forces. <IMAGE>

Description

L'invention est relative à un interrupteur rotatif multipolaire moyenne tension à enveloppe de révolution étanche, remplie d'un gaz à rigidité diélectrique élevée, dont le pourtour interne porte par pôle un contact fixe d'entrée, un contact fixe de sortie et un contact fixe de mise à la terre, qui sont espacés angulairement et, qui coopèrent avec un pont de contacts en forme de couteau pivotant, porté par un arbre rotatif de commande qui s'étend dans l'axe de l'enveloppe, les différents pôles étant échelonnés le long dudit arbre à l'intérieur de l'enveloppe, et séparés par des parois transversales de subdivision longitudinale de l'enveloppe, ledit arbre pouvant occuper sélectivement trois positions; une position d'ouverture, une position de fermeture dans laquelle le pont de contacts relie lesdits contacts d'entrée et de sortie, et une position de mise à la terre, dans laquelle ledit pont de contacts relie lesdits contacts de sortie et de mise à la terre.The invention relates to a medium-voltage multipolar rotary switch with a sealed envelope of revolution, filled with a gas of high dielectric strength, the internal periphery of which carries by pole a fixed input contact, a fixed output contact and a contact fixed earthing, which are angularly spaced and which cooperate with a contact bridge in the form of a pivoting knife, carried by a rotary control shaft which extends in the axis of the envelope, the different poles being staggered along said tree inside the envelope, and separated by transverse walls of longitudinal subdivision of the envelope, said tree being able to occupy selectively three positions; an open position, a closed position in which the contact bridge connects said input and output contacts, and a grounding position, in which said contact bridge connects said output and connection contacts Earth.

Un tel interrupteur est décrit dans le document EP-A-199.044. Sous l'effet des forces électrodynamiques d'attraction extrêmement importantes dues au passage du courant dans le double couteau du pont de contact, les deux lames de contact risquent de se déformer, en diminuant la force de serrage transmise aux pinces.Such a switch is described in document EP-A-199,044. Under the effect of the extremely strong electrodynamic forces of attraction due to the passage of current in the double knife of the contact bridge, the two contact blades are likely to deform, reducing the clamping force transmitted to the clamps.

L'objet de l'invention consiste à accroître la force de contact en position de fermeture, et à éviter toute répulsion au niveau des pinces.The object of the invention is to increase the contact force in the closed position, and to avoid repulsion at the clamps.

L'interrupteur selon l'invention est caractérisé en ce que les deux lames de contacts dudit couteau sont disposées parallèlement et sont équipées d'extrémités divergentes pour former à chaque extrémité une pince de contact mobile venant en position de fermeture enserrer le contact fixe associé qui est agencé en plage de contact, que les deux lames sont sollicitées élastiquement l'une contre l'autre, le rapprochement étant limité, lorsque les pinces sont dégagées des contacts fixes par des butées encadrant la partie centrale de chaque lame, et que lesdites parties centrales sont en position engagée des pinces, à faible écartement pour être le siège de forces électrodynamiques d'attraction importante lorsqu'elles sont parcourues par le courant, cet écartement étant supérieur au fléchissement engendré par lesdites forces pour éviter une venue en contact des parties centrales des deux lames.The switch according to the invention is characterized in that the two contact blades of said knife are arranged in parallel and are equipped with divergent ends to form at each end a movable contact clamp coming in the closed position enclosing the associated fixed contact which is arranged in contact area, that the two blades are elastically biased against each other, the approximation being limited, when the clamps are released from the fixed contacts by stops framing the central part of each blade, and when said central parts are in the engaged position of the clamps, with small spacing so as to be the seat of electrodynamic forces of significant attraction when they are traversed by the current, this spacing being greater than the deflection generated by said forces to avoid coming into contact with the central parts of the two blades.

Les forces électrodynamiques de rapprochement sont ainsi mises à contribution pour renforcer la pression de contact.The approximating electrodynamic forces are thus used to reinforce the contact pressure.

Les parties centrales des lames présentent une échancrure d'une profondeur suffisante pour éviter toute venue en contact lors d'un fléchissement des lames. La profondeur de cette échancrure est de quelques dizièmes de millimètre, ce qui permet de conserver des forces électrodynamiques importantes dues au faible écartement des parties centrales des lames.The central parts of the blades have a notch of sufficient depth to prevent any coming into contact during a deflection of the blades. The depth of this notch is a few tenths of a millimeter, which makes it possible to conserve significant electrodynamic forces due to the small spacing of the central parts of the blades.

L'enveloppe comporte avantageusement une zone fragilisée, qui constitue une zone préférentielle d'éclatement en cas de surpression accidentelle à l'intérieur de l'enveloppe. Cette zone fragilisée est obtenue par une réduction de l'épaisseur de l'enveloppe, en l'occurrence dans la zone de jonction de l'un des fonds à la paroi de révolution.The envelope advantageously includes a weakened zone, which constitutes a preferential burst zone in the event of accidental overpressure inside the envelope. This weakened zone is obtained by a reduction in the thickness of the envelope, in this case in the zone of junction of one of the bottoms with the wall of revolution.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre, d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple non limitatif et représenté aux dessins annexés dans lesquels:Other advantages and characteristics will emerge more clearly from the description which follows, of an embodiment of the invention, given by way of nonlimiting example and shown in the appended drawings in which:

La figure 1 est une vue schématique en élévation et partiellement en coupe axiale d'un interrupteur selon l'invention, représenté en position fermé.Figure 1 is a schematic elevational view partially in axial section of a switch according to the invention, shown in the closed position.

Les figures 2,3 et 4 sont des coupes suivant la ligne 2-2 de la figure 1 représentant l'interrupteur respectivement en position fermé, ouvert et de mise à la terre.Figures 2,3 and 4 are sections along line 2-2 of Figure 1 showing the switch respectively in position closed, open and grounded.

La figure 5 est une vue partielle à échelle agrandie du couteau selon la figure 1, représenté en position ouvert.Figure 5 is a partial view on an enlarged scale of the knife according to Figure 1, shown in the open position.

La figure 6 est une vue analogue à celle de la figure 5 montrant le couteau en position fermé.Figure 6 is a view similar to that of Figure 5 showing the knife in the closed position.

Sur les figures, l'interrupteur rotatif tripolaire moyenne tension comporte une enveloppe étanche 10,constituée d'une cuve 11 et d'un couvercle 12 en matière plastique moulée, assemblée suivant un plan de joint 13. L'enveloppe étanche 10 de forme générale cylindrique est subdivisée en trois compartiments, par deux parois transversales 14, et l'ensemble est rempli d'un gaz à rigidité diélectrique élevée tel que l'hexafluorure de soufre, sous pression atmosphérique ou en surpression. Les trois pôles R,S,T de l'interrupteur logé chacun dans l'un des compartiments de l'interrupteur, sont identiques, et seul l'un d'entre eux est décrit en détail par la suite. Chaque pôle comporte un contact fixe d'entrée 15, un contact fixe de sortie 16 et un contact fixe de mise à la terre 17. Ces contacts fixes 15,16,17 sont disposés sur la face interne de l'enveloppe 10 et constituent des traversées étanches de l'enveloppe 10. Le contact fixe de sortie 16 comporte un plot de contact 18 diamétralement opposé au plot de contact 19 du contact fixe d'entrée 15, et un plot de contact fixe 20 diamétralement opposé au plot de contact fixe 21 du contact de mise à la terre 17. Un pont de contacts mobile en forme de couteau rotatif 22 est porté par un arbre de commande 23, s'étendant dans l'axe de l'enveloppe 10 et dont l'une des extrémités 24 traverse, d'une manière étanche l'enveloppe 10, pour coopérer avec un mécanisme de commande extérieur (non représenté).Chaque couteau 22 est constitué de deux lames 25,26 disposées parallèlement, et ayant des extrémités divergentes pour former des pinces de contact mobile 27,28 coopérant chacune avec l'un des contacts fixes 15,16,17.In the figures, the medium-voltage three-pole rotary switch comprises a sealed envelope 10, consisting of a tank 11 and a cover 12 of molded plastic, assembled along a joint plane 13. The sealed envelope 10 of general shape cylindrical is subdivided into three compartments, by two transverse walls 14, and the assembly is filled with a gas with high dielectric strength such as sulfur hexafluoride, at atmospheric pressure or under overpressure. The three poles R, S, T of the switch, each housed in one of the switch compartments, are identical, and only one of them is described in detail below. Each pole has a fixed input contact 15, a fixed output contact 16 and a fixed earthing contact 17. These fixed contacts 15,16,17 are arranged on the internal face of the casing 10 and constitute sealed crossings of the casing 10. The fixed output contact 16 comprises a contact pad 18 diametrically opposite the contact pad 19 of the fixed input contact 15, and a fixed contact pad 20 diametrically opposite the fixed contact pad 21 of the earthing contact 17. A movable contact bridge in the form of a rotary knife 22 is carried by a control shaft 23, extending in the axis of the casing 10 and one of the ends 24 of which crosses , in a sealed manner the casing 10, to cooperate with an external control mechanism (not shown). Each knife 22 consists of two blades 25, 26 arranged in parallel, and having divergent ends to form movable contact clamps 27.28 each cooperating with one of the fixed contacts 15,16,17.

Dans la position fermée de l'interrupteur représentée aux figures 1 et 2, le couteau 22 relie électriquement les contacts fixes d'entrée 15 et de sortie 16, et l'ouverture de l'interrupteur est commandée par une rotation d'environ 60° dans le sens des aiguilles d'une montre, sur la figure 2, de l'arbre de commande 23. Cette rotation amène les couteaux 22 des trois pôles dans la position inclinée, représentée sur la figure 3, qui correspond à la position d'ouverture de l'interrupteur. Une rotation poursuivie de l'arbre de commande 23 amène les couteaux 22 en contact des plots de contacts 20,21 du contact de sortie 16 et du contact de mise à la terre 17, reliant ainsi le contact fixe de sortie 16 au contact de mise à la terre 17. Cette rotation poursuivie est également voisine de 60°. Dans l'exemple représenté sur les figures, le contact fixe d'entrée 15 est disposé dans le fond du couvercle 12, et celui-ci porte une cloison isolante 29, venant avantageusement de moulage, et s'étendant sensiblement perpendiculairement au plan de joint 13, en étant intercalé entre le contact fixe d'entrée 15 et le contact de mise à la terre 17. La cloison isolante 29 est adjacente au contact fixe d'entrée 15 et elle s'étend jusqu'au pourtour de l'arbre de commande 23, de manière à limiter les risques de contournement et d'amorçage sur le plot 21 du contact de mise à la terre 17. La cloison 29 s'étend avantageusement sur toute la longueur du compartiment et sa disposition, à côté du contact fixe d'entrée 15 n'entrave pas la rotation du couteau 22. Dans la zone de jonction de la cloison 29 et des parois transversales 14 du compartiment sont ménagées des ouvertures 36, en forme d'échancrures voisines de l'arbre 23, pour permettre une circulation interne des gaz et donc de régénérer la tenue diélectrique dans la zone du plot de contact de mise à la terre 17.In the closed position of the switch shown in FIGS. 1 and 2, the knife 22 electrically connects the fixed input 15 and output 16 contact, and the opening of the switch is controlled by a rotation of approximately 60 ° clockwise, in Figure 2, the control shaft 23. This rotation brings the knives 22 of the three poles in the inclined position, shown in Figure 3, which corresponds to the open position of the switch. Continued rotation of the control shaft 23 brings the knives 22 into contact with the contact pads 20, 21 of the output contact 16 and of the earth contact 17, thereby connecting the fixed output contact 16 to the contact to earth 17. This continued rotation is also close to 60 °. In the example shown in the figures, the fixed input contact 15 is disposed in the bottom of the cover 12, and the latter carries an insulating partition 29, advantageously coming from molding, and extending substantially perpendicular to the joint plane 13, being interposed between the fixed input contact 15 and the grounding contact 17. The insulating partition 29 is adjacent to the fixed input contact 15 and it extends to the periphery of the shaft. control 23, so as to limit the risks of bypass and initiation on the stud 21 of the earthing contact 17. The partition 29 advantageously extends over the entire length of the compartment and its arrangement, next to the fixed contact inlet 15 does not hamper the rotation of the knife 22. In the junction zone of the partition 29 and the transverse walls 14 of the compartment are formed openings 36, in the form of notches adjacent to the shaft 23, to allow internal circulation of gases and therefore regenerating the dielectric withstand in the area of the grounding contact pad 17.

L'enveloppe 10 comporte avantageusement une zone fragilisée 30 d'éclatement en cas de surpression interne à l'enveloppe 10. Cette zone fragilisée est disposée dans la zone de raccordement de l'enveloppe cylindrique 10, et de l'un des fonds 31, en étant constituée par une simple rainure réduisant l'épaisseur de l'enveloppe. Cette zone fragilisée 30 est de préférence au voisinage du contact fixe de sortie 16, et elle permet un échappement des gaz vers les zones éloignées des autres pôles.The envelope 10 advantageously includes a weakened bursting zone 30 in the event of an internal overpressure in the envelope 10. This weakened zone is arranged in the connection zone of the cylindrical envelope 10, and of one of the bottoms 31, by being constituted by a simple groove reducing the thickness of the envelope. This weakened zone 30 is preferably at in the vicinity of the fixed output contact 16, and it allows gases to escape to areas remote from the other poles.

En se référant plus particulièrement aux figures 1,5 et 6, on voit que les lames de contacts 25,26 sont sollicitées l'une contre l'autre, par des ressorts 32. En position d'ouverture du couteau représenté à la figure 5, le rapprochement des lames 25,26 est limité par des butées 33 qui encadrent la partie centrale 34 des lames 25,26. Les pinces 27,28 restent ainsi suffisamment ouvertes pour engager les plages des contacts fixes lors d'un mouvement de fermeture. Les parties centrales 34 présentent une échancrure qui confinent une fente 35 d'écartement des parties centrales des lames 25,26. La largeur de cette fente 35 est de quelques dizièmes de millimètre et peut atteindre un millimètre. Lorsque le couteau 22 est en position de fermeture représentée sur la figure 6, les pinces 27,28 s'engagent sur les contacts fixes 15,16 qui leur imposent un écartement à l'encontre de la force des ressorts 32. Il est clair que lorsque les lames 25,26 sont parcourues par le courant circulant entre les contacts fixes d'entrée et de sortie 15,16, ces lames 25,26 sont soumises à des forces électrodynamiques de rapprochement qui participent à la pression de contact, et limitent les risques de répulsion de ces contacts. La largeur de la fente 35 est choisie suffisamment importante pour éviter tout contact entre les parties centrales 34 des lames 25,26 fléchies. Cette absence de venue en butée permet de conserver intacte la force de contact engendrée par les forces électrodynamiques d'attraction entre les lames 25,26. Ces forces électrodynamiques d'attraction sont légèrement plus faibles que lors d'une absence d'une échancrure, mais cette réduction est acceptable.Referring more particularly to FIGS. 1.5 and 6, it can be seen that the contact blades 25, 26 are urged against one another, by springs 32. In the open position of the knife shown in FIG. 5 , the bringing together of the blades 25, 26 is limited by stops 33 which frame the central part 34 of the blades 25, 26. The clamps 27, 28 thus remain sufficiently open to engage the ranges of the fixed contacts during a closing movement. The central parts 34 have a notch which confines a slot 35 for spacing the central parts of the blades 25, 26. The width of this slot 35 is a few tenths of a millimeter and can reach one millimeter. When the knife 22 is in the closed position shown in FIG. 6, the clamps 27, 28 engage on the fixed contacts 15, 16 which force them apart against the force of the springs 32. It is clear that when the blades 25, 26 are traversed by the current flowing between the fixed input and output contacts 15, 16, these blades 25, 26 are subjected to approximating electrodynamic forces which participate in the contact pressure, and limit the risk of repulsion from these contacts. The width of the slot 35 is chosen to be large enough to avoid any contact between the central parts 34 of the bent blades 25, 26. This absence of abutment keeps intact the contact force generated by the electrodynamic forces of attraction between the blades 25,26. These electrodynamic forces of attraction are slightly weaker than in the absence of a notch, but this reduction is acceptable.

Le fonctionnement de l'interrupteur ressort de l'exposé précédent, et l'invention est bien entendu nullement limitée au mode de mise en oeuvre plus particulièrement décrit.The operation of the switch is clear from the previous description, and the invention is of course in no way limited to the mode of implementation more particularly described.

Claims (8)

Interrupteur rotatif multipolaire moyenne tension à enveloppe (10) de révolution étanche, remplie d'un gaz à rigidité diélectrique élevée, dont le pourtour interne porte par pôle un contact fixe d'entrée (15), un contact fixe de sortie (16) et un contact fixe de mise à la terre (17), qui sont espacés angulairement et qui coopèrent avec un pont de contacts (22) en forme de couteau pivotant, porté par un arbre rotatif (23) de commande qui s'étend dans l'axe de l'enveloppe (10), les différents pôles (R,S,T) étant échelonnés le long dudit arbre (23) à l'intérieur de l'enveloppe (10), et séparés par des parois transversales (14) de subdivision longitudinale de l'enveloppe, ledit arbre (23) pouvant occuper sélectivement trois positions; une position d'ouverture, une position de fermeture dans laquelle le pont de contacts (22) relie lesdits contacts d'entrée (15) et de sortie (16), et une position de mise à la terre, dans laquelle ledit pont de contacts (22) relie lesdits contacts de sortie (16) et de mise à la terre (17), ledit couteau de chaque pont de contact (22) étant constitué de deux lames de couteau (25, 26), caractérisé en ce que les deux lames (25,26) de contacts sont disposées parallèlement et sont équipéés d'extrémités divergentes pour former à chaque extrémité une pince (27,28) de contact mobile venant en position de fermeture enserrer le contact fixe (15,16,17) associé qui est agencé en plage de contact, que les deux lames (25,26) sont sollicitées élastiquement l'une contre l'autre, le rapprochement étant limité, lorsque les pinces sont dégagées des contacts fixes (15,16,17), par des butées (33) encadrant la partie centrale (34) de chaque lame (25,26), et que lesdites parties centrales (34) sont en position engagée des pinces (27,28), à faible écartement pour être le siège de forces électrodynamiques d'attraction importante lorsqu'elles sont parcourues par le courant, cet écartement étant supérieur au fléchissement engendré par lesdites forces pour éviter une venue en contact des parties centrales (34) des deux lames (25,26).Medium voltage multipolar rotary switch with sealed revolution envelope (10), filled with a gas with high dielectric strength, the inner periphery of which carries by pole a fixed input contact (15), a fixed output contact (16) and a fixed earthing contact (17), which are angularly spaced and which cooperate with a contact bridge (22) in the form of a pivoting knife, carried by a rotary control shaft (23) which extends in the axis of the envelope (10), the different poles (R, S, T) being staggered along said shaft (23) inside the envelope (10), and separated by transverse walls (14) of longitudinal subdivision of the envelope, said shaft (23) being able to selectively occupy three positions; an open position, a closed position in which the contact bridge (22) connects said input (15) and output (16) contacts, and a grounding position, in which said contact bridge (22) connects said output (16) and grounding (17) contacts, said knife of each contact bridge (22) consisting of two knife blades (25, 26), characterized in that the two contact blades (25,26) are arranged in parallel and are equipped with divergent ends to form at each end a movable contact clamp (27,28) coming in the closed position enclose the associated fixed contact (15,16,17) which is arranged in contact area, that the two blades (25, 26) are urged elastically against one another, the approximation being limited, when the clamps are released from the fixed contacts (15, 16, 17), by stops (33) framing the central part (34) of each blade (25,26), and that said parts cen trales (34) are in the engaged position of the clamps (27, 28), with a small spacing to be the seat of electrodynamic forces of significant attraction when they are traversed by the current, this spacing being greater than the deflection generated by said forces for avoid coming into contact with the central parts (34) of the two blades (25,26). Interrupteur rotatif selon la revendication 1, caractérisé en ce que lesdites parties centrales (34) sont constituées par une échancrure (35) ménagée dans les lames (25, 26).Rotary switch according to claim 1, characterized in that said central parts (34) consist of a notch (35) formed in the blades (25, 26). Interrupteur rotatif selon la revendication 2, caractérisé en ce que la profondeur de l'échancrure (35) est de quelques dizièmes de millimètre.Rotary switch according to claim 2, characterized in that the depth of the notch (35) is a few tenths of a millimeter. Interrupteur rotatif selon la revendication 1, 2 ou 3, caractérisé en ce que dans chaque pôle, une cloison isolante (29) s'étend entre le pourtour de l'enveloppe (10) en matériau isolant moulé et l'arbre de commande (23), en étant intercalé entre le contact fixe d'entrée (15), et le contact fixe de mise à la terre (17), et que la cloison (29) venant de moulage avec l'enveloppe (10) est adjacente au contact fixe d'entrée (15), du côté du contact fixe de mise à la terre (17).Rotary switch according to claim 1, 2 or 3, characterized in that in each pole, an insulating partition (29) extends between the periphery of the envelope (10) of molded insulating material and the control shaft (23 ), being interposed between the fixed input contact (15), and the fixed earthing contact (17), and that the partition (29) coming from molding with the casing (10) is adjacent to the contact fixed input (15), on the side of the fixed earthing contact (17). Interrupteur rotatif selon l'une des revendications 1 à 4, caractérisé en ce que le contact de sortie (16) comporte un plot de contact (18) diamétralement opposé au contact d'entrée (15), et un plot de contact (20) diamétralement opposé au contact de mise à la terre (17), et que l'écart angulaire entre le contact d'entrée (15) et le contact de mise à la terre (17) est voisin de 60°.Rotary switch according to one of claims 1 to 4, characterized in that the output contact (16) comprises a contact pad (18) diametrically opposite the input contact (15), and a contact pad (20) diametrically opposite to the earthing contact (17), and that the angular difference between the input contact (15) and the earthing contact (17) is close to 60 °. Interrupteur rotatif selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite enveloppe (10) présente une zone fragilisée (30) constituant une zone d'éclatement préférentielle.Rotary switch according to any one of the preceding claims, characterized in that said envelope (10) has a weakened zone (30) constituting a preferential burst zone. Interrupteur rotatif selon la revendication 6, caractérisé en ce que ladite zone fragilisée (30) est constituée par une épaisseur réduite de la paroi de l'enveloppe.Rotary switch according to claim 6, characterized in that said weakened zone (30) consists of a reduced thickness of the wall of the envelope. Interrupteur rotatif selon la revendication 6 ou 7, caractérisé en ce que ladite zone fragilisée (30) est localisée à la jonction de l'un (31) des fonds et de la paroi de révolution de l'enveloppe (10).Rotary switch according to claim 6 or 7, characterized in that said weakened zone (30) is located at the junction of one (31) of the bottoms and of the wall of revolution of the envelope (10).
EP19910420366 1990-11-06 1991-10-18 Multiphase rotating switch Expired - Lifetime EP0485306B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9013843 1990-11-06
FR9013843A FR2668851B1 (en) 1990-11-06 1990-11-06 MULTIPOLAR ROTARY SWITCH.

Publications (2)

Publication Number Publication Date
EP0485306A1 true EP0485306A1 (en) 1992-05-13
EP0485306B1 EP0485306B1 (en) 1995-07-26

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EP19910420366 Expired - Lifetime EP0485306B1 (en) 1990-11-06 1991-10-18 Multiphase rotating switch

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EP (1) EP0485306B1 (en)
CA (1) CA2054509C (en)
DE (1) DE69111571T2 (en)
ES (1) ES2077203T3 (en)
FR (1) FR2668851B1 (en)

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* Cited by examiner, † Cited by third party
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FR2719154A1 (en) * 1994-04-25 1995-10-27 Merlin Gerin Medium voltage electrical switch.
EP0874380A1 (en) * 1997-04-25 1998-10-28 Soule Materiel Electrique Power cut-off device for low and high-tension
EP1928065A1 (en) * 2006-11-30 2008-06-04 ABB Technology AG Medium voltage gas-insulated switch-disconnector.
EP2278601A1 (en) * 2009-07-20 2011-01-26 ABB Technology AG Embedded pole part with an isolating housing made of thermoplastic material
EP2365503A1 (en) * 2010-03-10 2011-09-14 Converteam Technology Ltd Rotary switches
CN102683091A (en) * 2012-05-14 2012-09-19 北京合锐清合电气有限公司 24KV inflatable cabinet load switch
US20130153538A1 (en) * 2011-12-20 2013-06-20 Lsis Co., Ltd. Arc extinguishing apparatus for ring main unit
US8729417B2 (en) 2009-07-20 2014-05-20 Abb Technology Ag Method of manufacturing a current terminal for embedded pole part, and pole part itself
CN104779104A (en) * 2015-05-08 2015-07-15 国网上海市电力公司 Arc-suppression switch
CN107068469A (en) * 2017-05-12 2017-08-18 中科电力装备集团有限公司 Disconnecting switch structure in a kind of transformer

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FR2722912B1 (en) 1994-07-20 1996-09-13 Schneider Electric Sa MEDIUM VOLTAGE ELECTRIC SWITCHES
EP2346157B1 (en) 2009-12-18 2012-08-22 Schneider Electric Industries SAS pincer type phase inversion device

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DE1293279B (en) * 1963-09-14 1969-04-24 Fritz Driescher Spez Fbk F Ele Multipole high voltage circuit breaker
DE3131351A1 (en) * 1980-12-11 1982-10-21 VEB Transformatorenwerk Karl Liebknecht, DDR 1160 Berlin Switching contact, especially for high-voltage interrupter switches
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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719154A1 (en) * 1994-04-25 1995-10-27 Merlin Gerin Medium voltage electrical switch.
EP0680063A1 (en) * 1994-04-25 1995-11-02 Schneider Electric Sa Medium voltage electric switch
US5644117A (en) * 1994-04-25 1997-07-01 Schneider Electric Sa Medium voltage electrical circuit breaker and switch
EP0874380A1 (en) * 1997-04-25 1998-10-28 Soule Materiel Electrique Power cut-off device for low and high-tension
FR2762710A1 (en) * 1997-04-25 1998-10-30 Soule Materiel Electr ELECTRICAL SHUTDOWN DEVICE FOR LOW AND HIGH VOLTAGE
EP1928065A1 (en) * 2006-11-30 2008-06-04 ABB Technology AG Medium voltage gas-insulated switch-disconnector.
CN102549697A (en) * 2009-07-20 2012-07-04 Abb技术股份公司 Embedded pole part with an isolating housing made of thermoplastic material
EP2278601A1 (en) * 2009-07-20 2011-01-26 ABB Technology AG Embedded pole part with an isolating housing made of thermoplastic material
WO2011009581A1 (en) * 2009-07-20 2011-01-27 Abb Technology Ag Embedded pole part with an isolating housing made of thermoplastic material
US8658930B2 (en) 2009-07-20 2014-02-25 Abb Technology Ag Embedded pole part with an isolating housing made of thermoplastic material
US8729417B2 (en) 2009-07-20 2014-05-20 Abb Technology Ag Method of manufacturing a current terminal for embedded pole part, and pole part itself
EP2365503A1 (en) * 2010-03-10 2011-09-14 Converteam Technology Ltd Rotary switches
WO2011110296A1 (en) * 2010-03-10 2011-09-15 Converteam Technology Ltd Rotary switches
CN103026440A (en) * 2010-03-10 2013-04-03 Ge能源能量变换技术有限公司 Rotary switches
US9040861B2 (en) 2011-12-20 2015-05-26 Lsis Co., Ltd. Arc extinguishing apparatus for ring main unit
US20130153538A1 (en) * 2011-12-20 2013-06-20 Lsis Co., Ltd. Arc extinguishing apparatus for ring main unit
CN103178465A (en) * 2011-12-20 2013-06-26 Ls产电株式会社 Arc extinguishing apparatus for ring main unit
CN103178465B (en) * 2011-12-20 2016-05-04 Ls产电株式会社 For the arc-control device of ring main unit
CN102683091A (en) * 2012-05-14 2012-09-19 北京合锐清合电气有限公司 24KV inflatable cabinet load switch
CN102683091B (en) * 2012-05-14 2014-09-10 北京合锐清合电气有限公司 24KV inflatable cabinet load switch
CN104779104A (en) * 2015-05-08 2015-07-15 国网上海市电力公司 Arc-suppression switch
CN107068469A (en) * 2017-05-12 2017-08-18 中科电力装备集团有限公司 Disconnecting switch structure in a kind of transformer
CN107068469B (en) * 2017-05-12 2019-12-03 中科电力装备集团有限公司 Disconnecting switch structure in a kind of transformer

Also Published As

Publication number Publication date
ES2077203T3 (en) 1995-11-16
DE69111571D1 (en) 1995-08-31
CA2054509C (en) 2002-01-01
FR2668851B1 (en) 1994-10-07
DE69111571T2 (en) 1996-06-20
FR2668851A1 (en) 1992-05-07
CA2054509A1 (en) 1992-05-07
EP0485306B1 (en) 1995-07-26

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