EP0592338B1 - Mechanism for an earthing switch - Google Patents

Mechanism for an earthing switch Download PDF

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Publication number
EP0592338B1
EP0592338B1 EP19930420392 EP93420392A EP0592338B1 EP 0592338 B1 EP0592338 B1 EP 0592338B1 EP 19930420392 EP19930420392 EP 19930420392 EP 93420392 A EP93420392 A EP 93420392A EP 0592338 B1 EP0592338 B1 EP 0592338B1
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EP
European Patent Office
Prior art keywords
contact
switch
bearing shaft
earthing switch
dead point
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
EP19930420392
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German (de)
French (fr)
Other versions
EP0592338A1 (en
Inventor
Patrick Bonnardel
Jacques Quenin
Norbert Perrichon
Jean-Louis Sonzogni
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Schneider Electric SE
Original Assignee
Schneider Electric SE
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Publication date
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Publication of EP0592338A1 publication Critical patent/EP0592338A1/en
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Publication of EP0592338B1 publication Critical patent/EP0592338B1/en
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/06—Energy stored by deformation of elastic members by compression or extension of coil springs
    • 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
    • H01H31/02—Details
    • H01H31/04—Interlocking mechanisms
    • H01H31/10—Interlocking mechanisms for interlocking two or more switches

Definitions

  • the invention relates to the field of electrical protection cells, for example for the protection of a medium voltage transformer, comprising a switch or a circuit breaker arranged in series with an earthing switch. It relates to more particularly the disconnector opening and closing mechanism, from maneuvers of the operating member associated with the switch.
  • such a mechanism can be a passage mechanism of neutral point capable of being coupled, via a mechanism interlocking, to the operating member of the switch associated in series with the earthing switch, so that the operating member of the switch controls simultaneously opening the switch and closing the earthing switch, respectively closing the switch and opening the earthing switch.
  • the earthing switch comprises a fixed contact connected electrically at the switch, and a movable contact carried by a contact-carrying shaft rotating and earthed.
  • document US-A-3,735,073 discloses a single switch comprising a double spring mechanism, a first spring to flip the switch of the open position to the closed position, and a second spring to overcome the forces electromagnetic when an electrical fault occurs.
  • the invention aims to remedy the drawback mentioned above, by proposing a particularly reliable and safe mechanism with regard to electrical protection provided by the cell.
  • the passage from the neutral point of the first mechanism takes place substantially at the end of the stroke of the operating member associated with the switch, and the first angular position corresponds to the position of the contact carrier shaft in stable position disconnector open.
  • the operation of the operating member is so-called “independent”, that is to say that the rotary contact shaft does not start actually in motion only when the operating member is almost at the end and therefore the switch is already in the open position.
  • the operation of the operating member is said to be “dependent”, that is to say that the setting in motion of the operating member directly results in a movement of the contact carrier shaft.
  • the first mechanism is located at one end of the axis of rotation of the contact carrier shaft, while the second mechanism is located at the other end of said axis of rotation.
  • the protection cell 1 has an inlet electrical 2 and an electrical outlet 6. Connected in series between inlet 2 and outlet 3, there is for example a switch or a circuit breaker 3 with three positions (closed, open, earthed) with break in SF6 gas, fuse 4 and a disconnector earth 5.
  • the disconnector 5 conventionally comprises a fixed contact 8 and a contact rotary mobile 7.
  • An interlocking mechanism 11 is provided between the operation 13 of the switch 3 and the opening and closing mechanism of the disconnector 5, so that the drive of the operating member 13 controls simultaneously opening the switch 3 and closing the disconnector 5, respectively the closing of the switch 3 and the opening of the disconnector 5.
  • protection cell 1 will have three circuits electrical identical to that of Figure 2, arranged in parallel. Such a cell protection is particularly well suited for the protection of transformers medium voltage.
  • FIG. 3 illustrates a three-phase disconnector comprising three fixed contacts 8a, 8b and 8c and three movable contacts 7a, 7b and 7c, the latter being mounted on a carrier shaft contact 9, pivotally mounted about an axis 10.
  • the mechanism opening and closing of the disconnector is coupled to the operating member 13 of the switch 3 by means of a locking rod 11 movable in translation along its length.
  • One of the ends of the rod 11 carries a connecting rod 12 articulated on the member of rotary operation 13 of switch 3, while the other end carries a guide 11a provided with a rectilinear light 34 arranged parallel to the rod 11 and intended to cooperate with the disconnector mechanism 5.
  • the disconnector mechanism comprises a first 30 and a second 20 mechanisms at neutral.
  • the passage mechanisms to neutral 20 and 30 are located on either side of the axis 10 of rotation of the carrier shaft contact 9 so as to balance the mobile assembly.
  • the first neutral passage mechanism 30 illustrated in FIGS. 4 to 6, 8, 9 and 11 is supported by a fixed frame 40a on which the axis 10 of the carrier shaft is mounted contact 9.
  • the mechanism 30 comprises a crank 32 rotatably mounted around a axis 33 carried by a fixed frame 40a.
  • Crank 32 is equipped with a first roller 35 which cooperates with the rectilinear light 34 of the guide 11a, and of a second roller 36 which cooperates with a light 37 of complex shape, formed in part 9a of the tree contact carrier 9.
  • the crank 32 is biased by an anchored tension spring 31, of a on the crank 32 at point 31a, and on the other hand on the fixed frame 40a at point 31b.
  • the contact-carrying shaft 9 forms a angle ⁇ with respect to a fixed arbitrary reference, for example the horizontal in the case present.
  • the second neutral passage mechanism 20 illustrated in FIGS. 7 and 10 comprises a tension spring 21 anchored, on the one hand at point 21a on a bevel gear 9b integral with the contact-carrying shaft 9, and on the other hand on the fixed frame 40b at point 21b.
  • the contact-carrying shaft 9 therefore remains stationary. After a certain idle stroke, the organ maneuver 13 being practically at the end of its travel, the end of the light 34 comes abut on the roller 35 and causes the crank 32 to rotate about the axis 33.
  • the spring 31 resistant so far, comes to take its neutral position ( Figure 5, the points 31a, 33 and 31b are aligned), the contact carrier shaft 9 still having not moved due to the free movement of the roller 36 inside the slot 37.
  • the spring 31 As soon as the spring 31 has passed its neutral position, it becomes a motor and puts the shaft contact 9 in rotation through the roller 36 and the light 37.
  • the maneuver 13 arrived at the end of the race ( Figure 6).
  • the closing of the disconnector 5 is said to be independent, the displacement of the shaft carries contact 9 not being directly coupled to the drive of the operating member 13, because it is slightly delayed. It will thus be understood that any foreign body preventing accidentally closing the disconnector 5, cannot in any case prevent the opening of the switch 3.
  • the contact carrying shaft 9 can be fitted with a angular position indicator, it will then suffice to check, before any intervention on the installation, that the disconnector 5 is indeed closed.
  • the passage of the neutral point of the spring 31 when the disconnector is closed corresponds to the angular position ⁇ of the contact carrier arm in open position; however, those skilled in the art will understand easily that this feature is not imperative.
  • the angular position ⁇ of the passage of the neutral point of the spring 21 associated with the mechanism 20 should always be between the angular positions ⁇ and ⁇ of the passages the neutral point of the spring 31 associated with the mechanism 30, respectively at closing and when the disconnector opens.
  • the passage from the neutral point of the mechanism 30 precedes the passage of the neutral point of the mechanism 20, whatever the direction of the maneuver of the control member 13; preferably these three angular positions ⁇ and ⁇ and ⁇ are closer to the open position than to the closed position.

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  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Gas-Insulated Switchgears (AREA)

Description

L'invention se situe dans le domaine des cellules de protection électrique, par exemple pour la protection d'un transformateur moyenne tension, comprenant un interrupteur ou un disjoncteur disposé en série avec un sectionneur de mise à la terre. Elle concerne plus particulièrement le mécanisme d'ouverture et de fermeture du sectionneur, à partir des manoeuvres de l'organe de manoeuvre associé à l'interrupteur.The invention relates to the field of electrical protection cells, for example for the protection of a medium voltage transformer, comprising a switch or a circuit breaker arranged in series with an earthing switch. It relates to more particularly the disconnector opening and closing mechanism, from maneuvers of the operating member associated with the switch.

D'après le document DE-C-611 677, il est connu de commander, à partir d'un même organe de manoeuvre, un interrupteur et son sectionneur de terre associé.According to document DE-C-611 677, it is known to order, from the same operating device, a switch and its associated earthing switch.

De manière également connue, un tel mécanisme peut être un mécanisme à passage de point mort susceptible d'être couplé, par l'intermédiaire d'un mécanisme d'interverrouillage, à l'organe de manoeuvre de l'interrupteur associé en série au sectionneur de terre, de sorte que l'organe de manoeuvre de l'interrupteur commande simultanément l'ouverture de l'interrupteur et la fermeture du sectionneur de terre, respectivement la fermeture de l'interrupteur et l'ouverture du sectionneur de terre. De manière également connue, le sectionneur de terre comprend un contact fixe relié électriquement à l'interrupteur, et un contact mobile porté par un arbre porte contact rotatif et relié à la terre.In a manner also known, such a mechanism can be a passage mechanism of neutral point capable of being coupled, via a mechanism interlocking, to the operating member of the switch associated in series with the earthing switch, so that the operating member of the switch controls simultaneously opening the switch and closing the earthing switch, respectively closing the switch and opening the earthing switch. Of also known manner, the earthing switch comprises a fixed contact connected electrically at the switch, and a movable contact carried by a contact-carrying shaft rotating and earthed.

Du fait d'un couplage direct entre l'interrupteur et le sectionneur, il peut arriver que le blocage pour une raison quelconque de l'arbre porte contact empêche le fonctionnement de l'interrupteur associé. Un tel blocage est particulièrement grave pour l'équipement électrique à protéger si, lors de l'apparition d'une anomalie, il empêche l'ouverture de l'interrupteur.Due to a direct coupling between the switch and the disconnector, it may happen that the blocking for any reason of the contact holder shaft prevents operation of the associated switch. Such a blockage is particularly serious for the equipment to protect if, when an anomaly occurs, it prevents the opening of the switch.

Par ailleurs, le document US-A-3 735 073 divulgue un interrupteur seul comportant un mécanisme à double ressort, un premier ressort pour basculer l'interrupteur de la positon ouverte vers la position fermée, et un second ressort pour vaincre les forces électromagnétiques à l'occasion d'un défaut électrique.Furthermore, document US-A-3,735,073 discloses a single switch comprising a double spring mechanism, a first spring to flip the switch of the open position to the closed position, and a second spring to overcome the forces electromagnetic when an electrical fault occurs.

L'invention vise à remédier à l'inconvénient évoqué ci-dessus, en proposant un mécanisme particulièrement fiable et sûr en ce qui concerne la protection électrique assurée par la cellule.The invention aims to remedy the drawback mentioned above, by proposing a particularly reliable and safe mechanism with regard to electrical protection provided by the cell.

Le mécanisme selon l'invention est décrit dans la revendication 1. The mechanism according to the invention is described in claim 1.

De préférence, le passage du point mort du premier mécanisme s'effectue sensiblement en fin de course de l'organe de manoeuvre associé à l'interrupteur, et la première position angulaire correspond à la position de l'arbre porte contact en position stable ouverte du sectionneur.Preferably, the passage from the neutral point of the first mechanism takes place substantially at the end of the stroke of the operating member associated with the switch, and the first angular position corresponds to the position of the contact carrier shaft in stable position disconnector open.

Ainsi, lors de la fermeture du sectionneur, la manoeuvre de l'organe de manoeuvre est dite "indépendante", c'est à dire que l'arbre porte contact rotatif ne se met effectivement en mouvement que lorsque l'organe de manoeuvre est quasiment en fin de course, et que par conséquent l'interrupteur est déjà en position ouverte. Au contraire, lors de l'ouverture du sectionneur, la manoeuvre de l'organe de manoeuvre est dite "dépendante", c'est à dire que la mise en mouvement de l'organe de manoeuvre se traduit directement par un mouvement de l'arbre porte contact.Thus, when the disconnector is closed, the operation of the operating member is so-called "independent", that is to say that the rotary contact shaft does not start actually in motion only when the operating member is almost at the end and therefore the switch is already in the open position. At on the contrary, during the opening of the disconnector, the operation of the operating member is said to be "dependent", that is to say that the setting in motion of the operating member directly results in a movement of the contact carrier shaft.

De préférence, le premier mécanisme est situé à l'une des extrémités de l'axe de rotation de l'arbre porte contact, tandis que le second mécanisme est situé à l'autre extrémité dudit axe de rotation.Preferably, the first mechanism is located at one end of the axis of rotation of the contact carrier shaft, while the second mechanism is located at the other end of said axis of rotation.

Les caractéristiques et avantages de l'invention seront mieux compris dans la description détaillée ci-après d'un mode de réalisation en référence aux dessins annexés dans lesquels:

  • la figure 1 représente schématiquement, à titre illustratif, une cellule de protection destinée à recevoir un mécanisme selon l'invention;
  • la figure 2 représente le schéma électrique de la cellule représentée à la figure 1;
  • la figure 3 est une vue en perspective de l'arbre porte contact du sectionneur équipé d'un mécanisme selon un mode particulier de réalisation de l'invention;
  • les figures 4,5 et 6 sont des vues latérales détaillées de droite d'un mode de réalisation du premier mécanisme associé à l'arbre porte contact de la figure 3, le premier mécanisme étant respectivement représenté en position stable ouvert, puis au passage de son point mort lors de l'entraínement de l'organe de manoeuvre en vue de la fermeture du sectionneur, et enfin à la fin de l'entraínement de l'organe de manoeuvre pour la fermeture du sectionneur;
  • la figure 7 est une vue latérale détaillée de gauche d'un mode de réalisation du second mécanisme associé à l'arbre porte contact de la figure 3, le second mécanisme étant représenté au passage de son point mort lors de la fermeture du sectionneur;
  • les figures 8 et 9 sont des vues latérales détaillées de droite du premier mécanisme respectivement représenté en position stable fermée, et au passage de son point mort lors de l'entraínement de l'organe de manoeuvre en vue de l'ouverture du sectionneur;
  • la figure 10 est une vue latérale détaillée de gauche du second mécanisme représenté au passage de son point mort lors de l'ouverture du sectionneur; et
  • la figure 11 est une vue latérale détaillée de droite du premier mécanisme représenté à la fin de l'entraínement de l'organe de manoeuvre pour l'ouverture du sectionneur.
The characteristics and advantages of the invention will be better understood in the detailed description below of an embodiment with reference to the appended drawings in which:
  • Figure 1 schematically shows, by way of illustration, a protection cell intended to receive a mechanism according to the invention;
  • Figure 2 shows the electrical diagram of the cell shown in Figure 1;
  • Figure 3 is a perspective view of the contact carrier shaft of the disconnector equipped with a mechanism according to a particular embodiment of the invention;
  • Figures 4,5 and 6 are detailed side views of the right of an embodiment of the first mechanism associated with the contact carrier shaft of Figure 3, the first mechanism being respectively shown in the stable open position, then the passage of its neutral position during the drive of the operating member with a view to closing the disconnector, and finally at the end of the training of the operating member for closing the disconnector;
  • Figure 7 is a detailed left side view of an embodiment of the second mechanism associated with the contact carrier shaft of Figure 3, the second mechanism being shown when passing from its neutral position when the disconnector is closed;
  • Figures 8 and 9 are detailed side views of the right of the first mechanism respectively shown in the stable closed position, and when passing from its neutral point during the drive of the operating member for the opening of the disconnector;
  • Figure 10 is a detailed left side view of the second mechanism shown when passing from its neutral position when the disconnector is opened; and
  • Figure 11 is a detailed right side view of the first mechanism shown at the end of the drive of the operating member for the opening of the disconnector.

En référence aux figures 1 et 2, la cellule de protection 1 comporte une arrivée électrique 2 et un départ électrique 6. Branchés en série entre l'arrivée 2 et le départ 3, on trouvera par exemple un interrupteur ou un disjoncteur 3 à trois positions (fermé, ouvert, mis à la terre) à coupure dans du gaz SF6, un fusible 4 et un sectionneur de terre 5. Le sectionneur 5 comprend de manière classique un contact fixe 8 et un contact mobile rotatif 7. Un mécanisme d'interverrouillage 11 est prévu entre l'organe de manoeuvre 13 de l'interrupteur 3 et le mécanisme d'ouverture et de fermeture du sectionneur 5, de sorte que l'entraínement de l'organe de manoeuvre 13 commande simultanément l'ouverture de l'interrupteur 3 et la fermeture du sectionneur 5, respectivement la fermeture de l'interrupteur 3 et l'ouverture du sectionneur 5. Pour une alimentation triphasée, la cellule de protection 1 comportera trois circuits électriques identiques à celui de la figure 2, disposés en parallèle. Une telle cellule de protection est particulièrement bien adaptée pour la protection des transformateurs moyenne tension.With reference to FIGS. 1 and 2, the protection cell 1 has an inlet electrical 2 and an electrical outlet 6. Connected in series between inlet 2 and outlet 3, there is for example a switch or a circuit breaker 3 with three positions (closed, open, earthed) with break in SF6 gas, fuse 4 and a disconnector earth 5. The disconnector 5 conventionally comprises a fixed contact 8 and a contact rotary mobile 7. An interlocking mechanism 11 is provided between the operation 13 of the switch 3 and the opening and closing mechanism of the disconnector 5, so that the drive of the operating member 13 controls simultaneously opening the switch 3 and closing the disconnector 5, respectively the closing of the switch 3 and the opening of the disconnector 5. For a three-phase power supply, protection cell 1 will have three circuits electrical identical to that of Figure 2, arranged in parallel. Such a cell protection is particularly well suited for the protection of transformers medium voltage.

La figure 3 illustre un sectionneur triphasé comportant trois contacts fixes 8a, 8b et 8c et trois contacts mobiles 7a, 7b et 7c, ces derniers étant montés sur un arbre porte contact 9, monté à pivotement autour d'un axe 10. De manière connue, le mécanisme d'ouverture et de fermeture du sectionneur est couplé à l'organe de manoeuvre 13 de l'interrupteur 3 par l'intermédiaire d'une tige de verrouillage 11 mobile en translation dans le sens de sa longueur.FIG. 3 illustrates a three-phase disconnector comprising three fixed contacts 8a, 8b and 8c and three movable contacts 7a, 7b and 7c, the latter being mounted on a carrier shaft contact 9, pivotally mounted about an axis 10. In known manner, the mechanism opening and closing of the disconnector is coupled to the operating member 13 of the switch 3 by means of a locking rod 11 movable in translation along its length.

L'une des extrémités de la tige 11 porte une bielle 12 articulée sur l'organe de manoeuvre rotatif 13 de l'interrupteur 3, tandis que l'autre extrémité porte un guide 11a muni d'une lumière rectiligne 34 disposée parallèlement à la tige 11 et destinée à coopérer avec le mécanisme du sectionneur 5.One of the ends of the rod 11 carries a connecting rod 12 articulated on the member of rotary operation 13 of switch 3, while the other end carries a guide 11a provided with a rectilinear light 34 arranged parallel to the rod 11 and intended to cooperate with the disconnector mechanism 5.

Selon l'invention, le mécanisme du sectionneur comprend un premier 30 et un second 20 mécanismes à passage de point mort. De préférence, les mécanisme de passage à point mort 20 et 30 sont situés de part et d'autre de l'axe 10 de rotation de l'arbre porte contact 9 de façon à équilibrer l'ensemble mobile.According to the invention, the disconnector mechanism comprises a first 30 and a second 20 mechanisms at neutral. Preferably, the passage mechanisms to neutral 20 and 30 are located on either side of the axis 10 of rotation of the carrier shaft contact 9 so as to balance the mobile assembly.

Les mécanismes 20 et 30 et leur mode de fonctionnement vont maintenant être décrits en détail en référence aux figures 4 à 11.Mechanisms 20 and 30 and their mode of operation will now be described in detail with reference to Figures 4 to 11.

Le premier mécanisme 30 à passage de point mort illustré aux figures 4 à 6, 8, 9 et 11 est supporté par un châssis fixe 40a sur lequel est monté l'axe 10 de l'arbre porte contact 9. Le mécanisme 30 comprend une manivelle 32 montée en rotation autour d'un axe 33 porté par un châssis fixe 40a. La manivelle 32 est équipée d'un premier galet 35 qui coopère avec la lumière rectiligne 34 du guide 11a, et d'un second galet 36 qui coopère avec une lumière 37 de forme complexe, pratiquée dans la partie 9a de l'arbre porte contact 9. La manivelle 32 est sollicitée par un ressort de traction 31 ancré, d'une part sur la manivelle 32 au point 31a, et d'autre part sur le châssis fixe 40a au point 31b.The first neutral passage mechanism 30 illustrated in FIGS. 4 to 6, 8, 9 and 11 is supported by a fixed frame 40a on which the axis 10 of the carrier shaft is mounted contact 9. The mechanism 30 comprises a crank 32 rotatably mounted around a axis 33 carried by a fixed frame 40a. Crank 32 is equipped with a first roller 35 which cooperates with the rectilinear light 34 of the guide 11a, and of a second roller 36 which cooperates with a light 37 of complex shape, formed in part 9a of the tree contact carrier 9. The crank 32 is biased by an anchored tension spring 31, of a on the crank 32 at point 31a, and on the other hand on the fixed frame 40a at point 31b.

En position stable ouverte, illustrée par la figure 4, l'arbre porte contact 9 forme un angle α par rapport à une référence arbitraire fixe, par exemple l'horizontal dans le cas présent. In the open stable position, illustrated in FIG. 4, the contact-carrying shaft 9 forms a angle α with respect to a fixed arbitrary reference, for example the horizontal in the case present.

Le second mécanisme 20 à passage de point mort illustré aux figures 7 et 10 comprend un ressort de traction 21 ancré, d'une part au point 21a sur un renvoi d'angle 9b solidaire de l'arbre porte contact 9, et d'autre part sur le châssis fixe 40b au point 21b.The second neutral passage mechanism 20 illustrated in FIGS. 7 and 10 comprises a tension spring 21 anchored, on the one hand at point 21a on a bevel gear 9b integral with the contact-carrying shaft 9, and on the other hand on the fixed frame 40b at point 21b.

Le fonctionnement va maintenant être décrit en détail. Lorsqu'on actionne l'organe de manoeuvre 13 associé à l'interrupteur 3 en vue d'ouvrir l'interrupteur 3 et de fermer le sectionneur 5, (Figure 5, les points 31a, 33 et 31b sont alignés), la tige 11 subit un mouvement de translation vertical vers le bas et la lumière 34 associée au guide 11a glisse sur le galet 35.The operation will now be described in detail. When we activate the organ of operation 13 associated with the switch 3 in order to open the switch 3 and close the disconnector 5, (Figure 5, points 31a, 33 and 31b are aligned), the rod 11 undergoes a downward vertical translational movement and the light 34 associated with the guide 11a slides on the roller 35.

L'arbre porte contact 9 reste donc immobile. Après une certaine course à vide, l'organe de manoeuvre 13 étant pratiquement en fin de course, l'extrémité de la lumière 34 vient buter sur le galet 35 et entraíne la manivelle 32 en rotation autour de l'axe 33. Le ressort 31 résistant jusqu'ici, vient prendre sa position de point mort (Figure 5, les points 31a, 33 et 31b sont alignés), l'arbre porte contact 9 n'ayant toujours pas bougé du fait du déplacement libre du galet 36 à l'intérieur de la lumière 37. Dès que le ressort 31 a dépassé sa position de point mort, il devient moteur et met l'arbre porte contact 9 en rotation au travers du galet 36 et de la lumière 37. A ce stade, l'organe de manoeuvre 13 est arrivé en fin de course (Figure 6).The contact-carrying shaft 9 therefore remains stationary. After a certain idle stroke, the organ maneuver 13 being practically at the end of its travel, the end of the light 34 comes abut on the roller 35 and causes the crank 32 to rotate about the axis 33. The spring 31 resistant so far, comes to take its neutral position (Figure 5, the points 31a, 33 and 31b are aligned), the contact carrier shaft 9 still having not moved due to the free movement of the roller 36 inside the slot 37. As soon as the spring 31 has passed its neutral position, it becomes a motor and puts the shaft contact 9 in rotation through the roller 36 and the light 37. At this stage, the maneuver 13 arrived at the end of the race (Figure 6).

Au cours de la rotation de l'arbre porte contact 9, le ressort 21 du second mécanisme 20, résistant jusqu'alors, atteint sa position de point mort (Figure 7, les points 21a, 33 et 21b sont alignés) lorsque l'arbre porte contact 9 forme un angle β avec la référence fixe arbitraire, puis devient moteur à son tour. Ceci a pour effet d'équilibrer les couples moteur aux deux extrémités de l'axe 10 et d'accélérer la fermeture du sectionneur 5 (Figure 8).During the rotation of the contact-carrying shaft 9, the spring 21 of the second mechanism 20, hitherto resistant, reaches its neutral position (Figure 7, points 21a, 33 and 21b are aligned) when the contact-carrying shaft 9 forms an angle β with the reference fixed arbitrary, then becomes motor in turn. This has the effect of balancing the couples motor at both ends of the axis 10 and speed up the closing of the disconnector 5 (Figure 8).

La fermeture du sectionneur 5 est dite indépendante, le déplacement de l'arbre porte contact 9 n'étant pas directement couplé à l'entraínement de l'organe de manoeuvre 13, car il est légèrement retardé. On comprendra ainsi que tout corps étranger empêchant accidentellement la fermeture du sectionneur 5, ne pourra en aucun cas empêcher l'ouverture de l'interrupteur 3. L'arbre porte contact 9 pouvant être équipé d'un indicateur de position angulaire, il suffira alors de vérifier, avant toute intervention sur l'installation, que le sectionneur 5 est bel et bien fermé.The closing of the disconnector 5 is said to be independent, the displacement of the shaft carries contact 9 not being directly coupled to the drive of the operating member 13, because it is slightly delayed. It will thus be understood that any foreign body preventing accidentally closing the disconnector 5, cannot in any case prevent the opening of the switch 3. The contact carrying shaft 9 can be fitted with a angular position indicator, it will then suffice to check, before any intervention on the installation, that the disconnector 5 is indeed closed.

Lorsque l'on actionne l'organe de manoeuvre 13 associé à l'interrupteur 3 en vue de fermer l'interrupteur 3 et d'ouvrir le sectionneur 5, la tige 11 subit un mouvement de translation inverse et entraíne dès le début de sa translation la manivelle 32 et l'arbre porte contact 9 (Figure 9). L'ouverture du sectionneur 5 est dite dépendante, car tout mouvement de l'organe de commande 13 entraíne aussitôt le déplacement de l'arbre porte contact 9. On comprendra ainsi que tout corps étranger empêchant accidentellement l'ouverture du sectionneur 5, empêchera par la même, la fermeture de l'interrupteur 3.When the operating member 13 is actuated associated with the switch 3 with a view to close the switch 3 and open the disconnector 5, the rod 11 undergoes a movement of reverse translation and drives from the start of its translation the crank 32 and the shaft contact holder 9 (Figure 9). The opening of the disconnector 5 is said to be dependent, because everything movement of the control member 13 immediately causes the shaft to move door contact 9. It will thus be understood that any foreign body preventing accidentally opening the disconnector 5, will by the same prevent the closing of switch 3.

Dès que l'arbre porte contact 9a atteint une position angulaire γ (Figure 9), le ressort 31 du mécanisme 30, jusqu'ici résistant, passe par son point mort, puis devient moteur. L'organe de manoeuvre 13 est alors pratiquement en fin de course.As soon as the contact-carrying shaft 9a reaches an angular position γ (Figure 9), the spring 31 of mechanism 30, hitherto resistant, passes through its neutral point, then becomes motor. The operating member 13 is then practically at the end of the race.

Enfin lorsque l'arbre contact 9 arrive à la position angulaire β illustrée par la Figure 10, identique en ce qui concerne l'angle à celle de la Figure 7, le ressort 21 du mécanisme 20, jusqu'ici résistant, passe par son point mort, puis devient moteur à son tour. L'arbre porte contact 9 termine alors sa course d'ouverture (Figure 11) pour arriver à nouveau en position stable ouvert (Figure 1).Finally when the contact shaft 9 arrives at the angular position β illustrated by the Figure 10, identical with respect to the angle to that of FIG. 7, the spring 21 of the mechanism 20, hitherto resistant, passes through its neutral point, then becomes motor at its tower. The contact carrier shaft 9 then ends its opening stroke (Figure 11) to again reach the open stable position (Figure 1).

Selon le mode particulier de réalisation décrit ci-dessus, le passage du point mort du ressort 31 lors de la fermeture du sectionneur correspond à la position angulaire α du bras porte contact en position ouvert; cependant, l'homme de métier comprendra facilement que cette caractéristique n'est pas impérative.According to the particular embodiment described above, the passage of the neutral point of the spring 31 when the disconnector is closed corresponds to the angular position α of the contact carrier arm in open position; however, those skilled in the art will understand easily that this feature is not imperative.

Par contre, la position angulaire β du passage du point mort du ressort 21 associé au mécanisme 20 devra toujours se situer entre les positions angulaires α et β des passages du point mort du ressort 31 associé au mécanisme 30, respectivement à la fermeture et à l'ouverture du sectionneur. Ainsi le passage du point mort du mécanisme 30 précède le passage du point mort du mécanisme 20, quel que soit le sens de la manoeuvre de l'organe de commande 13; de préférence ces trois positions angulaires α et β et γ sont plus proches de la position ouverte que de la position fermée.On the other hand, the angular position β of the passage of the neutral point of the spring 21 associated with the mechanism 20 should always be between the angular positions α and β of the passages the neutral point of the spring 31 associated with the mechanism 30, respectively at closing and when the disconnector opens. Thus the passage from the neutral point of the mechanism 30 precedes the passage of the neutral point of the mechanism 20, whatever the direction of the maneuver of the control member 13; preferably these three angular positions α and β and γ are closer to the open position than to the closed position.

On notera également que dans les positions ouverte (Figure 4) et fermée (Figure 8) du sectionneur, l'irréversibilité est assurée par la forme particulière de la lumière 37 et la position relative de la manivelle 32 et de son galet 36.Note also that in the open (Figure 4) and closed (Figure 8) positions of the disconnector, irreversibility is ensured by the particular shape of the light 37 and the relative position of the crank 32 and its roller 36.

Claims (8)

  1. A mechanism with dead point passage for an earthing switch (5), designed to be coupled by means of an interlocking mechanism (11) to the operating device (13) of a switch (3) associated in series to said earthing switch in such a way that the operating device of the switch simultaneously commands opening of the switch (3) and closing of the earthing switch (5), and respectively closing of the switch (3) and opening of the earthing switch (5), said earthing switch comprising a stationary contact (8) electrically connected to the switch and a movable contact (7) supported by an electrically earthed rotary contact-beanng shaft (9), characterized in that it comprises :
    a first mechanism (30) with dead point passage activated by the movements of the operating device (13) and whose dead point passage corresponds on the one hand to a first angular position (a) of the contact-bearing shaft (9) when closing of the earthing switch takes place and on the other hand to a second angular position (a) of the contact-bearing shaft (9) when opening of the earthing switch takes place, said first mechanism (30) compnsing a first spring (31) secured at one of its ends to a fixed frame (40a) and at the other end to a crank (32) which pivots around a fixed spindle (33) and which cooperates on the one hand with the interlocking mechanism (11a) and on the other hand with the contact-bearing shaft (9), the dead point of the first spring (31) being established when the latter is aligned with the pivoting axis of the crank (32); and
    a second mechanism (20) with dead point passage activated by the movements of the contact-bearing shaft (9) and whose dead point passage corresponds to a third angular position (β) of the contact-bearing shaft (9) situated between said first and second angular positions, the dead point passage of the first mechanism (30) preceding the dead point passage of the second mechanism (20) both on opening and on closing of the earthing switch, said second mechanism (20) comprising a second spring (21) secured at one of its ends to a fixed frame (40b) and at the other end to the contact-bearing shaft (9b), the dead point of the second spring (21) being established when the latter is aligned with the pivoting axis of the contact-bearing shaft (9).
  2. The mechanism according to claim 1, characterized in that the dead point passage of the first mechanism (30) takes place appreciably at the end of travel of the operating device (13).
  3. The mechanism according to claim 1 or 2, characterized in that said first position (a) corresponds to the position of the contact-bearing shaft (9) in the stable open position of the earthing switch.
  4. The mechanism according to any one of the claims 1 to 3, characterized in that said first (α), second (α) and third (β) angular positions of the contact-bearing shaft (9) are nearer to the stable open position of the earthing switch than to the stable closed position of the earthing switch.
  5. The mechanism according to any one of the claims 1 to 4, characterized in that said crank (32) cooperates on the one hand with the interlocking mechanism (11a) by means of a first guiding means (34, 35) and on the other hand with the contact-bearing shaft (9) by means of a second guiding means (36, 37).
  6. The mechanism according to claim 5, characterized in that the first guiding means is formed by a first roller (35) fixedly attached to the crank (32) and by a first straight aperture (34) made in the interlocking rod (11a) and that the second guiding means is formed by a second roller (36) fixedly attached to the crank (32) and by a second aperture (37) of complex shape made in the contact-bearing shaft (9a).
  7. The mechanism according to any one of the claims 1 to 6, characterized in that said first mechanism (30) is situated at one of the ends of the rotation spindle (10) of the contact-bearing shaft (9) whereas the second mechanism (20) is situated at the other end of said rotation spindle.
  8. The mechanism according to claim 7, characterized in that the shape of the aperture (37) and the relative position of the crank (32) and of its roller (36) are designed to ensure irreversibility of the mechanism in the stable open and closed positions.
EP19930420392 1992-10-09 1993-10-04 Mechanism for an earthing switch Expired - Lifetime EP0592338B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9212276 1992-10-09
FR9212276A FR2696869B1 (en) 1992-10-09 1992-10-09 Mechanism for earthing switch.

Publications (2)

Publication Number Publication Date
EP0592338A1 EP0592338A1 (en) 1994-04-13
EP0592338B1 true EP0592338B1 (en) 1998-03-04

Family

ID=9434527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930420392 Expired - Lifetime EP0592338B1 (en) 1992-10-09 1993-10-04 Mechanism for an earthing switch

Country Status (4)

Country Link
EP (1) EP0592338B1 (en)
DE (1) DE69317198T2 (en)
ES (1) ES2114024T3 (en)
FR (1) FR2696869B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2773001B1 (en) * 1997-12-19 2000-01-21 Schneider Electric Sa MEDIUM VOLTAGE CELL WITH GAS INSULATION AND HIGH DIELECTRIC HOLD
ATE456147T1 (en) 2004-07-12 2010-02-15 Abb Technology Ag EARTH SWITCH
CN102025116B (en) * 2010-12-17 2012-11-14 安徽鑫龙电器股份有限公司 Interlocking device of high-tension switch gear
DE102020202689B4 (en) 2020-03-03 2022-06-09 Siemens Aktiengesellschaft Switching arrangement for medium voltage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE611677C (en) * 1929-11-27 1935-04-02 Neumann Hochspannungs App G M Distribution system with busbar system, switching devices and earthing switches
US3735073A (en) * 1971-11-30 1973-05-22 Westinghouse Electric Corp Circuit interrupter with overcenter spring charging means
DE2453194A1 (en) * 1974-11-09 1976-05-13 Bbc Brown Boveri & Cie Disconnecting switch safety earthing switch - has spring force drive actuated by common drive shaft in sequential manner
US4636594A (en) * 1985-09-24 1987-01-13 G & W Electric Company Switch with auxiliary biasing mechanism

Also Published As

Publication number Publication date
FR2696869A1 (en) 1994-04-15
FR2696869B1 (en) 1994-12-02
DE69317198D1 (en) 1998-04-09
ES2114024T3 (en) 1998-05-16
DE69317198T2 (en) 1998-12-03
EP0592338A1 (en) 1994-04-13

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