EP0467797A1 - High voltage circuit breaker - Google Patents

High voltage circuit breaker Download PDF

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Publication number
EP0467797A1
EP0467797A1 EP91420234A EP91420234A EP0467797A1 EP 0467797 A1 EP0467797 A1 EP 0467797A1 EP 91420234 A EP91420234 A EP 91420234A EP 91420234 A EP91420234 A EP 91420234A EP 0467797 A1 EP0467797 A1 EP 0467797A1
Authority
EP
European Patent Office
Prior art keywords
bar
contact
main
whip
disconnector
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.)
Ceased
Application number
EP91420234A
Other languages
German (de)
French (fr)
Inventor
Denis Koppe
François Duval
Patrick Leruyet
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
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 filed Critical Merlin Gerin SA
Publication of EP0467797A1 publication Critical patent/EP0467797A1/en
Ceased 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
    • H01H31/34—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
    • H01H31/36—Contact moved by pantograph
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
    • H01H33/121—Load break switches
    • H01H33/123—Load break switches in which the auxiliary contact pivots on the main contact-arm and performs a delayed and accelerated movement
    • H01H33/124—Load break switches in which the auxiliary contact pivots on the main contact-arm and performs a delayed and accelerated movement the auxiliary contact being a whip contact

Definitions

  • the invention relates to a disconnector for a high-voltage electrical substation, in particular a pantograph or semi-pantograph disconnector, comprising by phase a mobile system of articulated arms having a contact head, cooperating with a main bar conducting a device sensor suspended from a high voltage conductor, said contact head comprising a movable main contact, and a movable arcing contact with whip piloted by a control mechanism arranged to ensure the closure of the movable arcing contact before that of the contact main movable, and vice versa the opening of the movable arcing contact after that of the main movable contact.
  • Disconnectors for high-voltage substations must open and close with high loop currents.
  • the presence of the whip makes it possible to divert the current during the closings and openings of the main contacts, which in particular preserves the wear of the movable contact clamps.
  • the contact surface of the bar is deteriorated by the electric arc at the level of the zone of contact with the whip.
  • the triggering of the whip control mechanism takes place on the other hand by means of complicated kinematics of the disconnector which requires a specific triggering adjustment.
  • the object of the present invention is to improve the capacity and endurance of a whip disconnector for high voltage stations.
  • the disconnector according to the invention is characterized in that the control mechanism comprises a locking finger intended to cooperate in the locked position with a lug retaining lug in an armed state, and a trigger lever controlled during the closing stroke by the main bar after centering of the latter by means of a guiding device, causing the finger to move towards an unlocked position for releasing the whisk, which is then propelled against a fixed arcing contact of the collecting device.
  • the triggering of the whip occurs during the closing stroke, and is a function of the proximity of the pick-up bar, and not of the kinematics of the disconnector.
  • the fixed arcing contact is formed by an auxiliary brass bar extending orthogonally to the main bar, while the whip is made of stainless steel. The choice of these materials avoids any contact welding, and transfers wear to the auxiliary bar.
  • the guide device is provided with an insulating fork integral with the contact head, and comprising a flared V-shaped portion for centering the main bar, and a central slot in which the said bar engages to actuate the release lever towards the 'unlocked state of the control mechanism before closing of the movable main contact.
  • a high-voltage semi-pantograph disconnector 10 is mounted on a porcelain insulator (not shown) by means of a support plate 12.
  • the disconnector 10 comprises a movable system of articulated arms 14 having at the base 16, a mechanical link 18 pivotally mounted on an axis 20 of the support plate 12, and at the opposite end, a contact head 22 cooperating with a collection device 24, which is generally suspended from a conductive cable of the network high voltage.
  • the support plate 12 is provided with a reset lever 26 intended to automatically reset the disconnector 10 when the contact head 22 arrives in the open position.
  • the capture device 24 comprises a main conductor bar 28, carried by two opposite supports 30, 32, and a fixed arcing contact 34 constituted by an auxiliary brass bar.
  • the horizontal bar 28 plays the role of fixed main contact extending orthogonally to the bar of the fixed arcing contact 34, which is shorter than the bar 28, and disposed above the latter.
  • a conductor 36 connects the fixed contact 34 to the support 32 to bring it to the potential of the bar 28.
  • the contact head 22 is composed of a guide fork 38 made of insulating material, of a movable main contact 40 in the form of clamps, and of a movable arcing contact 42 of the whip type, controlled by a mechanism of control 44.
  • the guide fork 38 includes a straight central slot 46 whose width corresponds substantially to the diameter of the main bar 28, and a flared part 48 in V for centering the bar 28 during the closing.
  • the whip of the movable arcing contact 42 is formed by a stainless steel spring rod, mounted with limited rotation on a pivot 50 of the control mechanism 44. The pivot 50 extends parallel to the bar of the fixed arcing contact 34 , such that the movement of the movable whip takes place in a plane parallel to the bar 28.
  • the whisk control mechanism 44 is equipped with a locking finger 52 (FIG. 4) intended to occupy a locked position and an unlocked position depending on the state of a trigger lever 54 pivotally mounted on an axis. 56 intermediate.
  • the active end of the locking finger 52 cooperates in the locked position with a retaining lug 58, so as to maintain the movable arcing contact 42 in a direction parallel to the guide fork 38. In this position armed with the control 44, the whip always remains separated from the bar 28 and the bar of the fixed arcing contact 34.
  • the operation of the disconnector 10 is as follows:
  • the whip of the movable arcing contact 42 is armed by the resetting lever 26, and is held in this position by the finger 52 in the locked position.
  • the contact head 22 is located in a low area, close to the support plate 12.
  • the mechanical link 18 rotates around the axis 20 in the direction of the hands of a shows, driving the contact head 22 towards the capture device 24 (FIG. 1).
  • V-shaped part 48 of the insulating guide strip 38 then rests on the main bar 28 (FIGS. 2 and 3), allowing a progressive centering effect of the main bar 28 during the movement of raising the contact head 22, indicated by arrow F.
  • FIGS. 5 and 6 the operation of refocusing the bar 28 by the guide fork 38 is completed.
  • the main bar 28 is located at the entrance to the slot 46, and is kept out of contact with the pliers of the movable main contact 40. In this position, the trigger lever 54 is separated from the main bar 28 by a small gap.
  • the main bar 28 engages in the straight slot 46 of the guide fork 38, and actuates the trigger lever 54, which pivots around the axis 56.
  • the withdrawal of the finger 52 towards the unlocked position then releases the control mechanism 44 of the whip 42, which strikes the bar of the fixed arcing contact 34, with establishment of the current in the arcing circuit. In this position, the clamps of the movable main contact 40 are always out of contact with the bar 28.
  • the disconnector 10 ends its operation by closing the clamps of the movable main contact 40 on the bar 28.
  • This closure takes place without an arc between the bar 28 and the contact clamps 40.
  • the control mechanism 44 In the closed position of the disconnector 10 (FIGS. 9 and 10), the control mechanism 44 is in the tripped state and the force of support of the whip on the bar of the fixed arcing contact 34 is greater than 2 daN .
  • the mechanical link 18 rotates around the axis 20 in a trigonometric direction causing the contact head 22 to descend. The latter moves away from the main bar 28, with separation of the clamps. of the movable main contact 40.
  • the current then passes through the whip and the arcing contact bar 42,34.
  • the whip slides on the bar of the fixed arcing contact 34, and finally escapes with interruption of the current. At this time, the whip is still in the triggered position.
  • the triggering of the control mechanism 44 of the whip essentially depends on the action of the main collecting bar 28 on the trigger lever 54. This triggering occurs exclusively during the closing of the disconnector when the bar 28 is suitably centered by the guide fork 38. Resetting of the control mechanism 44 is automatic at the end of the disconnector 10 opening stroke.
  • the presence of the whip associated with its control mechanism 44 allows the opening and closing of disconnectors with intensities up to 3000A at low voltage.
  • the choice of contact materials, namely the stainless steel whip, and the fixed arcing contact bar 34 made of brass, makes it possible to avoid any welding effect of the contacts when a large arcing current appears.
  • the arc is extinguished in the air, and wear is transferred to the brass bar of the fixed arc contact 34.
  • the main bar 28 does not undergo any wear, given the absence of arc at the contact clamps Principa the mobile 40.
  • the whisk and control mechanism assembly 44 is easily adaptable to disconnectors already installed without modification of the main contacts.
  • the invention is applicable to any other type of disconnectors, in particular pantographs or knives.

Abstract

A circuit-breaker (10) with half-pantograph for a high-voltage station comprises a pick-up device (24) with main conductor bar (28), and a contact head (22) having an insulating guide fork (38), a main moving contact (40) with clips, and a moving arc contact (42) with whip associated with a control mechanism (44). A release lever (54) is driven by the bar (28) during the closing stroke in order to unlock a finger (52) of the mechanism (44), causing the movement of the whip towards a stationary arc contact (34) having the same potential as the main bar (28). The resetting of the mechanism (44) is done automatically at the end of the opening stroke of the circuit-breaker (10). …<??>The absence of any arc in the region of the main bar (28) improves the reliability of the circuit-breaker (10). …<IMAGE>…

Description

L'invention est relative à un sectionneur pour poste électrique à haute tension, notamment sectionneur à pantographe ou à semi-pantographe, comprenant par phase un système mobile de bras articulés ayant une tête de contact, coopérant avec un barreau principal conducteur d'un dispositif de captage suspendu à un conducteur à haute tension, ladite tête de contact comportant un contact principal mobile, et un contact d'arc mobile à fouet piloté par un mécanisme de commande agencé pour assurer la fermeture du contact d'arc mobile avant celle du contact principal mobile, et réciproquement l'ouverture du contact d'arc mobile après celle du contact principal mobile.The invention relates to a disconnector for a high-voltage electrical substation, in particular a pantograph or semi-pantograph disconnector, comprising by phase a mobile system of articulated arms having a contact head, cooperating with a main bar conducting a device sensor suspended from a high voltage conductor, said contact head comprising a movable main contact, and a movable arcing contact with whip piloted by a control mechanism arranged to ensure the closure of the movable arcing contact before that of the contact main movable, and vice versa the opening of the movable arcing contact after that of the main movable contact.

Les sectionneurs pour postes à haute tension doivent ouvrir et fermer avec de forts courants de boucle. La présence du fouet permet de dériver le courant lors des fermetures et ouvertures des contacts principaux, ce qui préserve notamment l'usure des pinces de contact mobiles. Par contre, la surface de contact du barreau est détériorée par l'arc électrique au niveau de la zone de contact avec le fouet. Le déclenchement du mécanisme de commande du fouet s'opère d'autre part au moyen d'une cinématique compliquée du sectionneur qui nécessite un réglage spécifique de déclenchement.Disconnectors for high-voltage substations must open and close with high loop currents. The presence of the whip makes it possible to divert the current during the closings and openings of the main contacts, which in particular preserves the wear of the movable contact clamps. On the other hand, the contact surface of the bar is deteriorated by the electric arc at the level of the zone of contact with the whip. The triggering of the whip control mechanism takes place on the other hand by means of complicated kinematics of the disconnector which requires a specific triggering adjustment.

L'objet de la présente invention consiste à améliorer la capacité et l'endurance d'un sectionneur à fouet pour postes à haute tension.The object of the present invention is to improve the capacity and endurance of a whip disconnector for high voltage stations.

Le sectionneur selon l'invention est caractérisé en ce que le mécanisme de commande comporte un doigt de verrouillage destiné à coopérer en position verrouillée avec un ergot de retenue du fouet dans un état armé, et un levier de déclenchement piloté pendant la course de fermeture par le barreau principal après centrage de ce dernier au moyen d'un dispositif de guidage, entraînant le déplacement du doigt vers une position déverrouillée de libération du fouet, lequel est alors propulsé contre un contact d'arc fixe du dispositif de captage.The disconnector according to the invention is characterized in that the control mechanism comprises a locking finger intended to cooperate in the locked position with a lug retaining lug in an armed state, and a trigger lever controlled during the closing stroke by the main bar after centering of the latter by means of a guiding device, causing the finger to move towards an unlocked position for releasing the whisk, which is then propelled against a fixed arcing contact of the collecting device.

Le déclenchement du fouet intervient pendant la course de fermeture, et est fonction de la proximité du barreau de captage, et non pas de la cinématique du sectionneur.The triggering of the whip occurs during the closing stroke, and is a function of the proximity of the pick-up bar, and not of the kinematics of the disconnector.

Le réarmement du fouet et le verrouillage du mécanisme de commande s'effectuent en fin de course d'ouverture par l'action d'un levier de réarmement.The resetting of the whip and the locking of the control mechanism take place at the end of the opening stroke by the action of a reset lever.

Le contact d'arc fixe est formé par une barre auxiliaire en laiton s'étendant orthogonalement au barreau principal, alors que le fouet est réalisé en acier inoxydable. Le choix de ces matériaux évite toute soudure de contact, et reporte l'usure sur la barre auxiliaire.The fixed arcing contact is formed by an auxiliary brass bar extending orthogonally to the main bar, while the whip is made of stainless steel. The choice of these materials avoids any contact welding, and transfers wear to the auxiliary bar.

Le dispositif de guidage est doté d'une fourche isolante solidaire de la tête de contact, et comprenant une partie évasée en V de centrage du barreau principal, et une fente centrale dans laquelle s'engage ledit barreau pour actionner le levier de déclenchement vers l'état déverrouillé du mécanisme de commande avant la fermeture du contact principal mobile.The guide device is provided with an insulating fork integral with the contact head, and comprising a flared V-shaped portion for centering the main bar, and a central slot in which the said bar engages to actuate the release lever towards the 'unlocked state of the control mechanism before closing of the movable main contact.

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 non limitatif et représenté aux dessins annexés, dans lesquels:

  • la figure 1 est une vue schématique en élévation d'un sectionneur à semi-pantographe selon l'invention;
  • les figures 2,5,7 et 9 montrent des vues partielles à échelles agrandies de la tête de contact représentée à la figure 1, au cours de différentes étapes de la course de fermeture;
  • les figures 3,6,8 et 10 sont des vues respectives de profil des figures 2,3,5,7 et 9;
  • la figure 4 est une vue de détail de la figure 3;
  • les figures 11 et 12 représentent des vues de la tête de contact, respectivement au voisinage et en fin de course d'ouverture du sectionneur.
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 represented in the appended drawings, in which:
  • Figure 1 is a schematic elevational view of a semi-pantograph disconnector according to the invention;
  • Figures 2,5,7 and 9 show partial views on enlarged scales of the contact head shown in Figure 1, during different stages of the closing stroke;
  • Figures 3,6,8 and 10 are respective side views of Figures 2,3,5,7 and 9;
  • Figure 4 is a detail view of Figure 3;
  • Figures 11 and 12 show views of the contact head, respectively in the vicinity and at the end of the disconnector opening stroke.

Sur la figure 1, un sectionneur 10 semi-pantographe à haute tension est monté sur un isolateur en porcelaine (non représenté) par l'intermédiaire d'une plaque support 12. Le sectionneur 10 comporte un système mobile de bras 14 articulés ayant à la base 16, une liaison mécanique 18 montée à pivotement sur un axe 20 de la plaque support 12, et à l'extrémité opposée, une tête de contact 22 coopérant avec un dispositif de captage 24, lequel est généralement suspendu à un câble conducteur du réseau à haute tension. La plaque support 12 est dotée d'un levier de réarmement 26 destiné à réarmer automatiquement le sectionneur 10 lorsque la tête de contact 22 arrive en position d'ouverture.In FIG. 1, a high-voltage semi-pantograph disconnector 10 is mounted on a porcelain insulator (not shown) by means of a support plate 12. The disconnector 10 comprises a movable system of articulated arms 14 having at the base 16, a mechanical link 18 pivotally mounted on an axis 20 of the support plate 12, and at the opposite end, a contact head 22 cooperating with a collection device 24, which is generally suspended from a conductive cable of the network high voltage. The support plate 12 is provided with a reset lever 26 intended to automatically reset the disconnector 10 when the contact head 22 arrives in the open position.

En référence aux figures 2 à 12, le dispositif de captage 24 comporte un barreau 28 principal conducteur, porté par deux supports 30,32 opposés, et un contact d'arc fixe 34 constitué par une barre auxiliaire en laiton. Le barreau 28 horizontal joue le rôle de contact principal fixe s'étendant orthogonalement à la barre du contact d'arc fixe 34, laquelle est plus courte que le barreau 28, et disposée au-dessus de ce dernier. Un conducteur 36 relie le contact fixe 34 au support 32 pour le porter au potentiel du barreau 28.With reference to FIGS. 2 to 12, the capture device 24 comprises a main conductor bar 28, carried by two opposite supports 30, 32, and a fixed arcing contact 34 constituted by an auxiliary brass bar. The horizontal bar 28 plays the role of fixed main contact extending orthogonally to the bar of the fixed arcing contact 34, which is shorter than the bar 28, and disposed above the latter. A conductor 36 connects the fixed contact 34 to the support 32 to bring it to the potential of the bar 28.

La tête de contact 22 est composée d'une fourche de guidage 38 en matériau isolant, d'un contact principal mobile 40 en forme de pinces, et d'un contact d'arc mobile 42 du type à fouet, piloté par un mécanisme de commande 44. La fourche de guidage 38 comporte une fente 46 centrale rectiligne dont la largeur correspond sensiblement au diamètre du barreau 28 principal, et une partie évasée 48 en V de centrage du barreau 28 lors de la fermeture. Le fouet du contact d'arc mobile 42 est formé par une tige ressort en acier inoxydable, montée à rotation limitée sur un pivot 50 du mécanisme de commande 44. Le pivot 50 s'étend parallèlement à la barre du contact d'arc fixe 34, tel que le débattement du fouet mobile s'opère dans un plan parallèle au barreau 28.The contact head 22 is composed of a guide fork 38 made of insulating material, of a movable main contact 40 in the form of clamps, and of a movable arcing contact 42 of the whip type, controlled by a mechanism of control 44. The guide fork 38 includes a straight central slot 46 whose width corresponds substantially to the diameter of the main bar 28, and a flared part 48 in V for centering the bar 28 during the closing. The whip of the movable arcing contact 42 is formed by a stainless steel spring rod, mounted with limited rotation on a pivot 50 of the control mechanism 44. The pivot 50 extends parallel to the bar of the fixed arcing contact 34 , such that the movement of the movable whip takes place in a plane parallel to the bar 28.

Le mécanisme de commande 44 du fouet, est équipé d'un doigt 52 de verrouillage (figure 4) destiné à occuper une position verrouillée et une position déverrouillée en fonction de l'état d'un levier de déclenchement 54 monté à pivotement sur un axe 56 intermédiaire. Le bout actif du doigt de verrouillage 52 coopère en position verrouillée avec un ergot 58 de retenue, de manière à assurer le maintien du contact d'arc mobile 42 selon une direction parallèle à la fourche de guidage 38. Dans cette position armée du mécanisme de commande 44, le fouet reste toujours écarté du barreau 28 et de la barre du contact d'arc fixe 34.The whisk control mechanism 44 is equipped with a locking finger 52 (FIG. 4) intended to occupy a locked position and an unlocked position depending on the state of a trigger lever 54 pivotally mounted on an axis. 56 intermediate. The active end of the locking finger 52 cooperates in the locked position with a retaining lug 58, so as to maintain the movable arcing contact 42 in a direction parallel to the guide fork 38. In this position armed with the control 44, the whip always remains separated from the bar 28 and the bar of the fixed arcing contact 34.

Le passage du doigt 52 de la position verrouillée vers la position déverrouillée s'opère lors de la phase de fermeture du sectionneur 10, lorsque le levier de déclenchement 54 est sollicité par le barreau 28 (figure 4). Le début d'actionnement du levier de déclenchement 54 intervient à la fin de la phase de recentrage du barreau 28 lors de son engagement dans la fente 46 centrale de la fourche de guidage 38. Le levier de déclenchement 54 est alors entraîné en rotation autour de l'axe 56 dans le sens des aiguilles d'une montre, de manière à libérer l'ergot 58 dans la position déverrouillée. Il en résulte un déclenchement du fouet qui pivote autour du pivot 50 par effet d'élasticité du ressort de torsion monté sur le pivot 50. Le mouvement de pivotement du fouet s'arrête lors de la venue en butée contre la barre du contact d'arc fixe 34 (figure 7).The passage of the finger 52 from the locked position to the unlocked position takes place during the closing phase of the disconnector 10, when the trigger lever 54 is biased by the bar 28 (Figure 4). The start of actuation of the trigger lever 54 occurs at the end of the re-centering phase of the bar 28 when it engages in the central slot 46 of the guide fork 38. The trigger lever 54 is then rotated around the axis 56 in a clockwise direction, so as to release the lug 58 in the unlocked position. This results in a triggering of the whip which pivots around the pivot 50 by the elasticity effect of the torsion spring mounted on the pivot 50. The pivoting movement of the whip stops when it comes into abutment against the contact contact bar. fixed arc 34 (Figure 7).

Le fonctionnement du sectionneur 10 est le suivant:The operation of the disconnector 10 is as follows:

FERMETURECLOSING

En position d'ouverture du sectionneur 10 (figure 12), le fouet du contact d'arc mobile 42 est armé par le levier de réarmement 26, et est maintenu dans cette position par le doigt 52 en position verrouillée. La tête de contact 22 se trouve dans une zone basse, proche de la plaque support 12. Lors de l'émission de l'ordre de fermeture, la liaison mécanique 18 tourne autour de l'axe 20 dans le sens des aiguilles d'une montre, entraînant la tête de contact 22 vers le dispositif de captage 24 (figure 1).In the open position of the disconnector 10 (FIG. 12), the whip of the movable arcing contact 42 is armed by the resetting lever 26, and is held in this position by the finger 52 in the locked position. The contact head 22 is located in a low area, close to the support plate 12. When the closing order is issued, the mechanical link 18 rotates around the axis 20 in the direction of the hands of a shows, driving the contact head 22 towards the capture device 24 (FIG. 1).

La partie 48 en V de la fouche de guidage 38 isolante prend ensuite appui sur le barreau 28 principal (figures 2 et 3), autorisant un effet de centrage progressif du barreau 28 principal lors du mouvement de remontée de la tête de contact 22, indiqué par la flèche F.The V-shaped part 48 of the insulating guide strip 38 then rests on the main bar 28 (FIGS. 2 and 3), allowing a progressive centering effect of the main bar 28 during the movement of raising the contact head 22, indicated by arrow F.

Sur les figures 5 et 6, l'opération de recentrage du barreau 28 par la fourche de guidage 38 est terminée. Le barreau 28 principal se trouve à l'entrée de la fente 46, et est maintenu hors contact avec les pinces du contact principal mobile 40. Dans cette position, le levier de déclenchement 54 est séparé du barreau 28 principal par un faible intervalle.In FIGS. 5 and 6, the operation of refocusing the bar 28 by the guide fork 38 is completed. The main bar 28 is located at the entrance to the slot 46, and is kept out of contact with the pliers of the movable main contact 40. In this position, the trigger lever 54 is separated from the main bar 28 by a small gap.

Au cours du mouvement ascendant poursuivi de la tête de contact 22 (figures 7 et 8), le barreau 28 principal s'engage dans la fente 46 rectiligne de la fourche de guidage 38, et actionne le levier de déclenchement 54, lequel pivote autour de l'axe 56. Le retrait du doigt 52 vers la position déverrouillée libère alors le mécanisme de commande 44 du fouet 42, qui vient frapper la barre du contact d'arc fixe 34, avec établissement du courant dans le circuit d'arc. Dans cette position, les pinces du contact principal mobile 40 sont toujours hors contact avec le barreau 28.During the continued upward movement of the contact head 22 (Figures 7 and 8), the main bar 28 engages in the straight slot 46 of the guide fork 38, and actuates the trigger lever 54, which pivots around the axis 56. The withdrawal of the finger 52 towards the unlocked position then releases the control mechanism 44 of the whip 42, which strikes the bar of the fixed arcing contact 34, with establishment of the current in the arcing circuit. In this position, the clamps of the movable main contact 40 are always out of contact with the bar 28.

En fin de course de fermeture de la tête de contact 22 (figures 9 et 10), le sectionneur 10 termine sa manoeuvre par la fermeture des pinces du contact principal mobile 40 sur le barreau 28.At the end of the closing stroke of the contact head 22 (FIGS. 9 and 10), the disconnector 10 ends its operation by closing the clamps of the movable main contact 40 on the bar 28.

Cette fermeture s'effectue sans arc entre le barreau 28 et les pinces de contact 40.This closure takes place without an arc between the bar 28 and the contact clamps 40.

OUVERTUREOPENING

Dans la position de fermeture du sectionneur 10 (figures 9 et 10), le mécanisme de commande 44 se trouve dans l'état déclenché et la force d'appui du fouet sur la barre du contact d'arc fixe 34 est supérieure à 2 daN. Après émission de l'ordre d'ouverture, la liaison mécanique 18 tourne autour de l'axe 20 dans le sens trigonométrique en provoquant la descente de la tête de contact 22. Cette dernière s'éloigne du barreau 28 principal, avec séparation des pinces du contact principal mobile 40. Le courant passe alors par le fouet et la barre des contacts d'arc 42,34. Au cours du mouvement de descente poursuivi, le fouet glisse sur la barre du contact d'arc fixe 34, et échappe finalement avec interruption du courant. A cet instant, le fouet se trouve toujours en position déclenchée.In the closed position of the disconnector 10 (FIGS. 9 and 10), the control mechanism 44 is in the tripped state and the force of support of the whip on the bar of the fixed arcing contact 34 is greater than 2 daN . After issuing the opening order, the mechanical link 18 rotates around the axis 20 in a trigonometric direction causing the contact head 22 to descend. The latter moves away from the main bar 28, with separation of the clamps. of the movable main contact 40. The current then passes through the whip and the arcing contact bar 42,34. During the downward movement continued, the whip slides on the bar of the fixed arcing contact 34, and finally escapes with interruption of the current. At this time, the whip is still in the triggered position.

Au voisinage de la position d'ouverture du sectionneur 10 (figure 11), le fouet vient en appui contre le levier de réarmement 26. Le ressort du fouet se tend jusqu'au verrouillage de l'ergot 58 de retenue par le doigt 52. Le sectionneur 10 se trouve alors en position d'ouverture complète avec réarmement automatique du mécanisme de commande 44 du fouet (figure 12).In the vicinity of the opening position of the disconnector 10 (FIG. 11), the whip comes to bear against the reset lever 26. The spring of the whip stretches until the latching pin 58 is locked by the finger 52. The disconnector 10 is then in the fully open position with automatic resetting of the control mechanism 44 of the whisk (FIG. 12).

On remarque que le déclenchement du mécanisme de commande 44 du fouet dépend essentiellement de l'action du barreau 28 principal de captage sur le levier de déclenchement 54. Ce déclenchement intervient exclusivement lors de la fermeture du sectionneur lorsque le barreau 28 est convenablement centré par la fourche de guidage 38. Le réarmement du mécanisme de commande 44 est automatique en fin de course d'ouverture du sectionneur 10.Note that the triggering of the control mechanism 44 of the whip essentially depends on the action of the main collecting bar 28 on the trigger lever 54. This triggering occurs exclusively during the closing of the disconnector when the bar 28 is suitably centered by the guide fork 38. Resetting of the control mechanism 44 is automatic at the end of the disconnector 10 opening stroke.

La présence du fouet associé à son mécanisme de commande 44 permet l'ouverture et la fermeture de sectionneurs avec des intensités allant jusqu'à 3000A en basse tension. Le choix des matériaux de contact, à savoir le fouet en acier inoxydable, et la barre du contact d'arc fixe 34 en laiton, permet d'éviter tout effet de soudage des contacts lors de l'apparition d'un courant d'arc important. L'extinction de l'arc s'effectue dans l'air, et l'usure est reportée sur la barre en laiton du contact d'arc fixe 34. Le barreau 28 principal ne subit aucune usure, étant donné l'absence d'arc au niveau des pinces du contact principal mobile 40.The presence of the whip associated with its control mechanism 44 allows the opening and closing of disconnectors with intensities up to 3000A at low voltage. The choice of contact materials, namely the stainless steel whip, and the fixed arcing contact bar 34 made of brass, makes it possible to avoid any welding effect of the contacts when a large arcing current appears. The arc is extinguished in the air, and wear is transferred to the brass bar of the fixed arc contact 34. The main bar 28 does not undergo any wear, given the absence of arc at the contact clamps Principa the mobile 40.

L'ensemble fouet et mécanisme de commande 44 est facilement adaptable à des sectionneurs déjà installés sans modification des contacts principaux.The whisk and control mechanism assembly 44 is easily adaptable to disconnectors already installed without modification of the main contacts.

L'invention est applicable à tout autre type de sectionneurs, notamment à pantographe ou à couteaux.The invention is applicable to any other type of disconnectors, in particular pantographs or knives.

Claims (6)

Sectionneur pour poste électrique à haute tension, notamment sectionneur à pantographe ou à semi-pantographe, comprenant par phase un système mobile de bras (14) articulés ayant une tête de contact (22), coopérant avec un barreau (28) principal conducteur d'un dispositif de captage (24) suspendu à un conducteur à haute tension, ladite tête de contact (22) comportant un contact principal mobile (40), et un contact d'arc mobile (42) à fouet piloté par un mécanisme de commande (44) agencé pour assurer la fermeture du contact d'arc mobile (42) avant celle du contact principal mobile (40), et réciproquement l'ouverture du contact d'arc mobile (42) après celle du contact principal mobile (40), caractérisé en ce que le mécanisme de commande (44) comporte un doigt (52) de verrouillage destiné à coopérer en position verrouillée avec un ergot (58) de retenue du fouet dans un état armé, et un levier de déclenchement (54) piloté pendant la course de fermeture par le barreau (28) principal après centrage de ce dernier au moyen d'un dispositif de guidage (38), entraînant le déplacement du doigt (52) vers une position déverrouillée de libération du fouet, lequel est alors propulsé contre un contact d'arc fixe (34) du dispositif de captage (24).Disconnector for high voltage electrical substation, in particular pantograph or semi-pantograph disconnector, comprising by phase a mobile system of articulated arms (14) having a contact head (22), cooperating with a bar (28) main conductor of a pick-up device (24) suspended from a high-voltage conductor, said contact head (22) comprising a movable main contact (40), and a movable arcing contact (42) with a whip controlled by a control mechanism ( 44) designed to close the movable arcing contact (42) before that of the movable main contact (40), and vice versa the opening of the movable arcing contact (42) after that of the movable main contact (40), characterized in that the control mechanism (44) comprises a locking finger (52) intended to cooperate in the locked position with a lug (58) for retaining the whip in an armed state, and a trigger lever (54) controlled during the closing stroke by the bar reau (28) principal after centering of the latter by means of a guide device (38), causing the displacement of the finger (52) towards an unlocked position for releasing the whisk, which is then propelled against a fixed arcing contact (34) of the capture device (24). Sectionneur selon la revendication 1, caractérisé en ce que le système mobile du bras (14) est monté sur une plaque support (12), laquelle est équipée d'un levier de réarmement (26) destiné à coopérer avec le fouet pour réarmer automatiquement le mécanisme de commande (44) en position d'ouverture du sectionneur (10) après blocage de l'ergot (58) de retenue par le doigt (52) de verrouillage.Disconnector according to claim 1, characterized in that the mobile system of the arm (14) is mounted on a support plate (12), which is equipped with a reset lever (26) intended to cooperate with the whip to automatically reset the control mechanism (44) in the disconnector opening position (10) after locking of the retaining lug (58) by the locking finger (52). Sectionneur selon la revendication 1 ou 2, caractérisé en ce que le contact d'arc fixe (34) est formé par une barre conductrice auxiliaire s'étendant orthogonalement au barreau (28) qui joue le rôle de contact principal fixe, et que le fouet du contact d'arc mobile (42) est monté à rotation sur un pivot (50) du mécanisme de commande (44), tel que le débattement dudit fouet s'effectue dans un plan parallèle au barreau (28) principal, la barre et le barreau (28) se trouvant à un même potentiel.Disconnector according to claim 1 or 2, characterized in that the fixed arcing contact (34) is formed by an auxiliary conducting bar extending orthogonally to the bar (28) which acts as the main fixed contact, and that the whip of the movable arcing contact (42) is rotatably mounted on a pivot (50) of the control mechanism (44), such that the movement of said whip is carried out in a plane parallel to the main bar (28), the bar and the bar (28) being at the same potential. Sectionneur selon la revendication 3, caractérisé en ce que la barre auxiliaire du contact d'arc fixe (34) est en laiton, alors que le fouet est réalisé en acier inoxydable.Disconnector according to claim 3, characterized in that the auxiliary bar of the fixed arcing contact (34) is made of brass, while the whip is made of stainless steel. Sectionneur selon l'une des revendications 1 à 4, caractérisé en ce que le dispositif de guidage (38) est doté d'une fourche isolante solidaire de la tête de contact(22), et comprenant une partie évasée (48) en V de centrage du barreau(28) principal, et une fente (46) centrale dans laquelle s'engage ledit barreau (28) pour actionner le levier de déclenchement (54) vers l'état déverrouillé du mécanisme de commande (44), avant la fermeture du contact principal mobile (40).Disconnector according to one of claims 1 to 4, characterized in that the guide device (38) is provided with an insulating fork integral with the contact head (22), and comprising a flared part (48) in V of centering of the main bar (28), and a central slot (46) in which the said bar (28) engages to actuate the trigger lever (54) towards the unlocked state of the control mechanism (44), before closing of the movable main contact (40). Sectionneur selon la revendication 5, caractérisé en ce que le levier de déclenchement (54) est monté à pivotement limité sur un axe (56) intermédiaire et possède une extrémité articulée au doigt de verrouillage (52), l'autre extrémité venant en contact avec le barreau (28) principal au début de son insertion dans la fente (46) du dispositif de guidage (38).Disconnector according to claim 5, characterized in that the trigger lever (54) is mounted with limited pivoting on an intermediate axis (56) and has one end articulated with the locking finger (52), the other end coming into contact with the main bar (28) at the start of its insertion into the slot (46) of the guide device (38).
EP91420234A 1990-07-19 1991-07-09 High voltage circuit breaker Ceased EP0467797A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9009360A FR2665019B1 (en) 1990-07-19 1990-07-19 HIGH VOLTAGE DISCONNECTOR.
FR9009360 1990-07-19

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EP0467797A1 true EP0467797A1 (en) 1992-01-22

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EP91420234A Ceased EP0467797A1 (en) 1990-07-19 1991-07-09 High voltage circuit breaker

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US (1) US5186315A (en)
EP (1) EP0467797A1 (en)
BR (1) BR9103089A (en)
CA (1) CA2046692A1 (en)
FR (1) FR2665019B1 (en)

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CN102053196B (en) * 2010-11-10 2013-05-22 西南交通大学 Arc voltage testing device of pantograph catenary
DE102018222848A1 (en) * 2018-12-21 2020-06-25 Siemens Aktiengesellschaft Earthing switch for a medium and / or high voltage circuit device and corresponding circuit device
CN113241648B (en) * 2021-05-21 2022-06-07 贵州电网有限责任公司 Transformer substation's isolator contact congeals processing apparatus

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Also Published As

Publication number Publication date
FR2665019A1 (en) 1992-01-24
BR9103089A (en) 1992-04-28
CA2046692A1 (en) 1992-01-20
US5186315A (en) 1993-02-16
FR2665019B1 (en) 1992-09-18

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