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EP0029467A1 - Electrical apparatus comprising a series of voltage taps and mobile selector equipment - Google Patents

Electrical apparatus comprising a series of voltage taps and mobile selector equipment Download PDF

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Publication number
EP0029467A1
EP0029467A1 EP79200685A EP79200685A EP0029467A1 EP 0029467 A1 EP0029467 A1 EP 0029467A1 EP 79200685 A EP79200685 A EP 79200685A EP 79200685 A EP79200685 A EP 79200685A EP 0029467 A1 EP0029467 A1 EP 0029467A1
Authority
EP
European Patent Office
Prior art keywords
rollers
contact
fixed contact
stirrup
auxiliary
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
EP79200685A
Other languages
German (de)
French (fr)
Other versions
EP0029467B1 (en
Inventor
Jean-Claude Dufrasne
Jules Thibaut
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.)
Umicore NV SA
Original Assignee
Ateliers de Constructions Electriques de Charleroi SA
ACEC 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 Ateliers de Constructions Electriques de Charleroi SA, ACEC SA filed Critical Ateliers de Constructions Electriques de Charleroi SA
Priority to DE7979200685T priority Critical patent/DE2967539D1/en
Priority to AT79200685T priority patent/ATE16327T1/en
Priority to EP79200685A priority patent/EP0029467B1/en
Priority to JP14809680A priority patent/JPS5676126A/en
Priority to ES496543A priority patent/ES496543A0/en
Priority to PT72069A priority patent/PT72069B/en
Priority to US06/207,880 priority patent/US4356359A/en
Priority to BR8007544A priority patent/BR8007544A/en
Priority to KR1019810000448A priority patent/KR830005687A/en
Publication of EP0029467A1 publication Critical patent/EP0029467A1/en
Priority to KR2019840011706U priority patent/KR840002854Y1/en
Application granted granted Critical
Publication of EP0029467B1 publication Critical patent/EP0029467B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/025—Constructional details of transformers or reactors with tapping on coil or windings
    • 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
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

Definitions

  • the present invention relates to an electrical appliance comprising a series of sockets and a movable selector unit provided with contacts cooperating with the sockets and connected to a circuit comprising at least one transition impedance, as well as a connection to a main conductor.
  • the mobile selector unit is actuated by a control device.
  • the typical example of such an electrical appliance with multiple plugs is an electrical transformer with steps fitted with a tap changer on charge of a charge selector.
  • the invention is however not limited to transformers but can be applied to other electrical devices such as compensation inductors, resistance banks or capacitor banks. These devices can be single-phase or can be designed for several phases. As in the vast majority of cases, the circuits of the selector crew or the sets of switches of the different phases are identical between them and present the differences only when special effects are envisaged, the description below is limited to the single-phase case .
  • Step transformers operating with the aid of mobile selector units for on-load tap-changers are well known and described in numerous patents and other prior documents.
  • a portion of a winding, seat of an electromotive force which one wants to add or subtract is short-circuited by one or more transition impedances housed on the moving part and put into service during one or more intermediate positions of this moving part.
  • the different sockets constituting the fixed contacts are electrically connected to the outputs of the adjustment winding, and are arranged, at a sufficient dielectric distance from each other, on the internal face of an insulating cylinder, inside which a movable selector assembly is driven in a rotational movement along the axis of the cylinder.
  • the mobile selector assembly is made up of three rows of rollers.
  • the central row consists of several main rollers which ensure the passage of current when the moving part is stationary in front of a fixed contact
  • the rows of end consist of a single auxiliary roller used to insert the transition impedances when moving the moving element and to allow switching without interruption of current.
  • these three rows of rollers are each mounted on stirrups driven by a telescopic movement or by an oscillating movement with a spring device giving each of these rows of rollers an adequate pressure on the fixed contact.
  • the lateral space requirement of the three rows of rollers of the moving element reduces the dielectric distance relative to the fixed contacts, close to that before which the moving element is stationary and limits the number of fixed contacts over a determined length of circumference.
  • the present invention characterized in that the two end stirrups oscillating on either side of their rest position, at an optionally adjustable angle, makes it possible to remedy these drawbacks.
  • the inclination of the end brackets reduces the lateral dimensions of the moving element at the level of the rollers, consequently, it increases the number of fixed contacts distributed over the same length of circumference and makes it possible to have an adjustment winding. with more intermediate outputs.
  • the oscillation of the end stirrups on either side of their rest position allows the auxiliary roller to slip away easily when it is present on the fixed contact. This arrangement considerably reduces the effects of the impact, at high speed, of the auxiliary roller on the fixed contact towards which the moving element is moving.
  • the contact pressure of the auxiliary rollers on the fixed contact and the return to the rest position are obtained by a device equipped with one or more springs.
  • This particular arrangement communicates with the auxiliary roller, responsible for cutting the circulation current established from the moment the two stirrups end are simultaneously in contact with the s u c-cessive fixed contacts, a high cutting speed by adding to the speed of one moving element that communicated by the return device of the end bracket.
  • This additional characteristic reduces the electrical wear of the auxiliary rollers responsible for cutting off the circulation current which in certain cases can be as high as the line current.
  • the central stirrup (I) made of a material which is a good conductor of electricity is located in the center of the fixed contact (5) and the end stirrups (2), also made of material good conductors of electricity are both in their rest position.
  • This movable assembly pivots about an axis (6) of a cylinder (7) on which the fixed contact (5) is positioned.
  • an axis (8) held at each end in a slide (9) made of insulating material, supports two main copper rollers (10) and a cutter roller made of copper-tungsten alloy (11) and slides in a buttonhole (12).
  • a spring (14) coaxial with the axis (8) ensures the continuity of the electrical circuit by applying the sides of the main copper rollers (10) against the stirrup (1).
  • FIG 3 is an elevation view of the central stirrup (1) stopped on the fixed contact (5).
  • This fixed contact (5) consists of two tracks (30) made of electrically conductive material and located on either side of a central region (31) material resis - as electric arc.
  • the central area (31) is arranged in a plane recessed with respect to the plane of the areas (30).
  • the central section (31) is longer than the sections (30) and ends at each end with an inclined plane (32) which facilitates access to and departure from the cutting roller (11).
  • each area (30) made of a material that is a good conductor of electricity ends at each end with an inclined plane (33) which facilitates access to and departure from the main rollers (10).
  • the main rollers (10) roll on the tracks (30) then on the inclined planes (33).
  • the cut-off roller (11) can in turn roll on the track (31) then on the inclined plane (32). In this way, the breaking of the current carried by the fixed contact (5) is carried out at the inclined plane (32) and the cutting roller (11) both made of material resistant to electric arc.
  • FIG 4 showing an exemplary embodiment of an end bracket (2) at rest, the rotation of the bracket (2) is provided by an axis (15).
  • One end of the bracket (2) supports an axis (20) around which pivots an auxiliary roller (21) made of copper-tungsten alloy, the other end of the bracket ends with a bar (22) which, in position rest, is aligned with the axis (15) and the spacer (19).
  • the strands (17) and (18) work respectively in the opposite direction in the manner described above.
  • the use of a torsion spring (16) as calliper return device (2) makes the contact pressure between the auxiliary roller (21) and the fixed contact (5) proportional to the angle from which the calliper (2) deviates from its rest position .
  • a corrugated washer (23) made of a material that is a good conductor of electricity is introduced between the auxiliary roller (21) and each arm of the caliper (2). Current can thus be conveyed from the auxiliary roller (21) to an outlet (24).
  • the diagram 5A shows the mobile assembly at rest on the fixed contact (5
  • the bracket (1), supporting the main rollers (10) is located in the middle of the fixed contact (5) and carries the line current IL at the voltage of the socket (29), from the fixed contact (5) to a main conductor (28).
  • the end stirrups (2) supporting the auxiliary rollers (21) are respectively designated by (2G) and (21G) for the stirrup and the auxiliary roller located to the left of the central stirrup and by (2D) and (21D ) for the caliper and the auxiliary roller located to the right of the central caliper.
  • the end brackets (2G and 2D) and the auxiliary rollers (21G and 21D) are at the potential of the socket (29).
  • the electrical circuit connecting the fixed contact (5) to the main conductor (28) is formed by two parallel branches of unequal resistances.
  • the branch of the end clamp (2G) in which the impedance (26) is inserted does not conduct the current; it is the branch of the central stirrup (1) of practically zero resistance which continues to convey the current of IL line from the fixed contact (5) to the main conductor (28).
  • Diagram 5C represents the moving part when the central stirrup (1) has just left the fixed contact (5) by cutting the line current IL, the passage of which is ensured, subsequently, by the branch of the end clamp (2G) through the impedance (26).
  • Diagram 5D shows the moving assembly when the auxiliary roller (21D) of the end bracket (2D) approaches the fixed contact (25) while the auxiliary roller (21G) of the end bracket (2G ) has not yet left the fixed contact (5).
  • the line current IL reaching the main conductor (28) is practically driven in half by the branch comprising the auxiliary roller (21G), the end clamp (2G) and the impedance (26), the other half of line current passes through the branch comprising the auxiliary roller (21D), the end bracket (2D) and the impedance (27).
  • Diagram 5F shows the moving part at rest in front of the fixed contact (25). Via the main rollers (10) and the central calliper (1), the end callipers (2G) and (2D) and the auxiliary rollers (21G and 21D) are at the potential of the socket (34) .

Landscapes

  • Power Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Contacts (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Push-Button Switches (AREA)
  • Keying Circuit Devices (AREA)
  • Electronic Switches (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Control Of Electrical Variables (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

Electrical contact apparatus comprises a center holder supporting a principal roller actuated by a telescopic movement and two oscillating auxiliary holders each equipped with an auxiliary roller.

Description

La présente invention est relative à un appareil électrique comprenant une série de prises et un équipage sélecteur mobile muni de contacts coopérant avec les prises et reliés à un circuit comprenant au moins une impédance de transition, ainsi qu'une liaison à un conducteur principal. L'équipage sélecteur mobile est actionné par un dispositif de commande. L'exemple type d'un tel appareil électrique à prises multiples est un transformateur électrique à gradins équipé d'un changeur de prises en charge d'un sélecteur de charge. L'invention n'est cependant pas limitée à des transformateurs mais peut être appliquée à d'autres appareils électriques tels que selfs de compensation, bancs de résistances ou batteries de condensateurs. Ces appareils peuvent être monophasés ou peuvent être conçus pour plusieurs phases. Comme dans la grande majorité des cas, les circuits de l'équipage sélecteur ou des ensembles de commutateurs des différentes phases sont identiques entr'eux et présentent les différences seulement lorsque des effets spéciaux sont envisagés, la description ci-dessous se limite au cas monophasé.The present invention relates to an electrical appliance comprising a series of sockets and a movable selector unit provided with contacts cooperating with the sockets and connected to a circuit comprising at least one transition impedance, as well as a connection to a main conductor. The mobile selector unit is actuated by a control device. The typical example of such an electrical appliance with multiple plugs is an electrical transformer with steps fitted with a tap changer on charge of a charge selector. The invention is however not limited to transformers but can be applied to other electrical devices such as compensation inductors, resistance banks or capacitor banks. These devices can be single-phase or can be designed for several phases. As in the vast majority of cases, the circuits of the selector crew or the sets of switches of the different phases are identical between them and present the differences only when special effects are envisaged, the description below is limited to the single-phase case .

Des transformateurs à gradins fonctionnant à l'aide d'équipages sélecteurs mobiles pour changeurs de prises en charge, sont bien connus et décrits dans de nombreux brevets et autres documents antérieurs. Dans ces transformateurs connus, au cours d'un cycle de changement de prises, une portion d'un enroulement, siège d'une force électromotrice que l'on veut ajouter ou soustraire, est court-circuitée par une ou plusieurs impédances de transition logées sur l'équipage mobile et mises en service pendant une ou plusieurs positions intermédiaires de cet équipage mobile. Généralement, les différentes prises constituant les contacts fixes sont reliées électriquement aux sorties de l'enroulement de réglage, et sont disposées, à distance diélectrique suffisante l'une de l'autre, sur la face intérne d'un cylindre isolant, à l'intérieur duquel un équipage sélecteur mobile est animé d'un mouvement de rotation suivant l'axe du cylindre.Step transformers operating with the aid of mobile selector units for on-load tap-changers are well known and described in numerous patents and other prior documents. In these known transformers, during a tap change cycle, a portion of a winding, seat of an electromotive force which one wants to add or subtract, is short-circuited by one or more transition impedances housed on the moving part and put into service during one or more intermediate positions of this moving part. Generally, the different sockets constituting the fixed contacts are electrically connected to the outputs of the adjustment winding, and are arranged, at a sufficient dielectric distance from each other, on the internal face of an insulating cylinder, inside which a movable selector assembly is driven in a rotational movement along the axis of the cylinder.

Dans une exécution particulière, l'équipage sélecteur mobile est composé de trois rangées de galets. La rangée centrale est constituée de plusieurs galets principaux qui assurent le passage du courant lorsque l'équipage mobile est à l'arrêt devant un contact fixe, les rangées d' extrémité sont constituées d'un seul galet auxiliaire servant à insérer les impédances de transition lors du déplacement de l'équipage mobile et de permettre la commutation sans interruption de courant. Selon les différentes réalisations, ces trois rangées de galets sont chacune montée sur des étriers animés d'un mouvement téléscopique ou d' un mouvement oscillant avec un dispositif à ressort donnant à chacune de ces rangées de galets une pression adéquate sur le contact fixe.In a particular version, the mobile selector assembly is made up of three rows of rollers. The central row consists of several main rollers which ensure the passage of current when the moving part is stationary in front of a fixed contact, the rows of end consist of a single auxiliary roller used to insert the transition impedances when moving the moving element and to allow switching without interruption of current. According to the different embodiments, these three rows of rollers are each mounted on stirrups driven by a telescopic movement or by an oscillating movement with a spring device giving each of these rows of rollers an adequate pressure on the fixed contact.

Ces réalisations connues actuellement présentent plusieurs inconvénients. Dans le cas d'équipages mobiles nantis d'étriers d'extrémité à mouvement télescopique, la direction, suivant laquelle se produit l'impact entre le galet auxiliaire supporté par l'étrier d'extrémité et le contact fixe vers lequel l'équipage mobile se déplace, présente une forte obliquité par rapport à l'axe de la glissière qui assure le mouvement télescopique. Il s'ensuit une usure rapide du dispositif, susceptible de gravement perturber le bon fonctionnement de tout l'appareil.These currently known embodiments have several drawbacks. In the case of mobile equipment provided with end stirrups with telescopic movement, the direction in which the impact occurs between the auxiliary roller supported by the end stirrup and the fixed contact to which the mobile equipment moves, has a strong obliquity with respect to the axis of the slide which ensures the telescopic movement. This results in rapid wear of the device, which can seriously disturb the proper functioning of the entire device.

D'autre part, dans ces réalisations l'encombrement latéral des trois rangées de galets de l'équipage mobile réduit la distance diélectrique par rapport aux contacts fixes, voisins de celui devant lequel l'équipage mobile est à l'arrêt et limite le nombre de contacts fixes sur une longueur déterminée de circonférence.On the other hand, in these embodiments, the lateral space requirement of the three rows of rollers of the moving element reduces the dielectric distance relative to the fixed contacts, close to that before which the moving element is stationary and limits the number of fixed contacts over a determined length of circumference.

La présente invention, caractérisée en ce que les deux étriers d'extrémité oscillant de part et d'autre de leur position de repos, selon un angle éventuellement réglable, permet de remédier à ces inconvénients. L'inclinaison des étriers d'extrémité réduit l'encombrement latéral de l'équipage mobile au niveau des galets, en conséquence, elle augmente le nombre de contacts fixes répartis sur une même longueur de circonférence et permet de disposer d'un enroulement de réglage avec plus de sorties intermédiaires. De plus, l'oscillation des étriers d'extrémité de part et d'autre de leur position de repos permet au galet auxiliaire de se dérober facilement lorsqu'il se présente sur le contact fixe. Cette disposition réduit considérablement les effets de l'impact, à grande vitesse, du galet auxiliaire sur le contact fixe vers lequel l'équipage mobile se déplace.The present invention, characterized in that the two end stirrups oscillating on either side of their rest position, at an optionally adjustable angle, makes it possible to remedy these drawbacks. The inclination of the end brackets reduces the lateral dimensions of the moving element at the level of the rollers, consequently, it increases the number of fixed contacts distributed over the same length of circumference and makes it possible to have an adjustment winding. with more intermediate outputs. In addition, the oscillation of the end stirrups on either side of their rest position allows the auxiliary roller to slip away easily when it is present on the fixed contact. This arrangement considerably reduces the effects of the impact, at high speed, of the auxiliary roller on the fixed contact towards which the moving element is moving.

Pour chaque étrier d'extrémité, la pression de contact des galets auxiliaires sur le contact fixe et le rappel en position de repos sont obtenus par un dispositif équipé d'un ou de plusieurs ressorts. Cette disposition particulière communique au galet auxiliaire, chargé de couper le courant de circulation établi dès le moment où les deux étriers d'extrémité sont simultanément en contact avec les contacts fixes suc-cessifs, une grande vitesse de coupure en ajoutant à la vitesse de 1' équipage mobile celle qui est communiquée par le dispositif de rappel de l'étrier d'extrémité. Cette caractéristique supplémentaire réduit l'usure électrique des galets auxiliaires chargés de couper le courant de circulation qui peut dans certains cas, être aussi élevé que le courant de ligne.For each end bracket, the contact pressure of the auxiliary rollers on the fixed contact and the return to the rest position are obtained by a device equipped with one or more springs. This particular arrangement communicates with the auxiliary roller, responsible for cutting the circulation current established from the moment the two stirrups end are simultaneously in contact with the s u c-cessive fixed contacts, a high cutting speed by adding to the speed of one moving element that communicated by the return device of the end bracket. This additional characteristic reduces the electrical wear of the auxiliary rollers responsible for cutting off the circulation current which in certain cases can be as high as the line current.

L'invention est décrite ci-dessous en se référant à un exemple d'exécution présenté dans les figures suivantes.The invention is described below with reference to an exemplary embodiment presented in the following figures.

  • La figure 1 est une vue en plan de l'équipage mobile représenté en position repos. Cet équipage mobile est composé d'un étrier central (1) et de deux étriers d'extrémité (2).Figure 1 is a plan view of the movable assembly shown in the rest position. This mobile assembly is composed of a central stirrup (1) and two end stirrups (2).
  • La figure 2 est une coupe partielle de l'étrier central (1).Figure 2 is a partial section of the central bracket (1).
  • La figure 3 est une vue en élévation de l'étrier central (1)Figure 3 is an elevational view of the central bracket (1)
  • La figure 4 est une vue de profil d'un étrier d'extrémité (2).Figure 4 is a side view of an end bracket (2).
  • La figure 5 reproduit schématiquement les diverses positions occupées par l'équipage mobile pour passer d'un contact fixe à un autre contact fixe.FIG. 5 schematically reproduces the various positions occupied by the moving assembly for switching from one fixed contact to another fixed contact.

Sur la figure 1, représentant l'équipage mobile au repos, 1' étrier central (I) en matériau bon conducteur d'électricité se trouve au centre du contact fixe (5) et les étriers d'extrémité (2), également en matériau bon conducteur d'électricité sont tous deux dans leur position de repos.In FIG. 1, representing the mobile assembly at rest, the central stirrup (I) made of a material which is a good conductor of electricity is located in the center of the fixed contact (5) and the end stirrups (2), also made of material good conductors of electricity are both in their rest position.

L'ensemble de cet équipage mobile pivote autour d'un axe (6) d' un cylindre (7) sur lequel le contact fixe (5) est positionné.The whole of this movable assembly pivots about an axis (6) of a cylinder (7) on which the fixed contact (5) is positioned.

Sur la figure 2, représentant l'étrier central (1) de l'équipage mobile au repos, un axe (8), maintenu à chaque extrémité dans une glissière (9) en matière isolante, supporte deux galets principaux en cuivre (10) et un galet de coupure en alliage de cuivre-tungstène (11) et coulisse dans une boutonnière (12). Un piston (13), en matière isolante, poussé par un ressort non représenté, applique les galets principaux (10) sur le contact fixe (5) avec une pression adéquate. Un ressort (14) co-axial de l'axe (8) permet d'assurer la continuité du circuit électrique en appliquant les flancs des galets principaux en cuivre(10) contre l'étrier (1).In FIG. 2, representing the central stirrup (1) of the mobile assembly at rest, an axis (8), held at each end in a slide (9) made of insulating material, supports two main copper rollers (10) and a cutter roller made of copper-tungsten alloy (11) and slides in a buttonhole (12). A piston (13), made of insulating material, pushed by a spring not shown, applies the main rollers (10) to the fixed contact (5) with an adequate pressure. A spring (14) coaxial with the axis (8) ensures the continuity of the electrical circuit by applying the sides of the main copper rollers (10) against the stirrup (1).

La figure 3 est une.vue en élévation de l'étrier central (1) à l'arrêt sur le contact fixe (5). Ce contact fixe (5) est constitué de deux plages (30) réalisées en matériau bon conducteur d'électricité et situées de part et d'autre d'une plage centrale (31) en matériau résis- tant à l'arc électrique. La plage centrale (31) est disposée dans un plan en retrait par rapport au plan des plages (30). De plus la plage centrale (31) est plus longue que les plages (30) et se termine à chaque extrémité par un plan incliné (32) qui facilite l'accès et le départ du galet de coupure (11). De même, chaque plage (30) en matériau bon conducteur d'électricité se termine à chaque extrémité par un plan incliné (33) qui facilite l'accès et le départ des galets principaux (10).Figure 3 is an elevation view of the central stirrup (1) stopped on the fixed contact (5). This fixed contact (5) consists of two tracks (30) made of electrically conductive material and located on either side of a central region (31) material resis - as electric arc. The central area (31) is arranged in a plane recessed with respect to the plane of the areas (30). In addition, the central section (31) is longer than the sections (30) and ends at each end with an inclined plane (32) which facilitates access to and departure from the cutting roller (11). Likewise, each area (30) made of a material that is a good conductor of electricity ends at each end with an inclined plane (33) which facilitates access to and departure from the main rollers (10).

Lorsque l'équipage mobile quitte le contact fixe (5) les galets principaux (10) roulent sur les pistes (30) puis sur les plans inclinés (33). Lorsque les galets principaux (10) ont quitté-le plan incliné (33), le galet de coupure (11) peut à son tour rouler sur la piste (31) puis sur le plan incliné (32). De la sorte, la coupure du courant véhiculé par le contact fixe (5) est réalisée au niveau du plan incliné (32) et du galet de coupure (11) tous deux en matériau résistant à l'arc électrique.When the moving part leaves the fixed contact (5) the main rollers (10) roll on the tracks (30) then on the inclined planes (33). When the main rollers (10) have left the inclined plane (33), the cut-off roller (11) can in turn roll on the track (31) then on the inclined plane (32). In this way, the breaking of the current carried by the fixed contact (5) is carried out at the inclined plane (32) and the cutting roller (11) both made of material resistant to electric arc.

Sur la figure 4, représentant un exemple d'exécution d'un étrier d'extrémité (2) au repos, la rotation de l'étrier (2) est assurée par un axe (15). Un ressort de torsion (16) co-axial à l'axe (15) se termine, à chaque extrémité par un brin (17 et 18) conformé pour prendre appui sur une entretoise (19) solidaire de l'équipage mobile. Une extrémité de l'étrier (2) supporte un axe(20) autour duquel pivote un galet auxiliaire (21) en alliage cuivre-tungstène, l'autre extrémité de l' étrier se termine par un barreau (22) qui, en position repos, se met dans l'alignement de l'axe (15) et de l'entretoise (19). Lorsque, suite au déplacement de l'équipage mobile, le galet (21) entre en contact avec un contact fixe (5) l'étrier (2) pivote autour de l'axe (15), un brin (17) du ressort de torsion (16) s'appuie sur l'entretoise (19) pendant que l'autre brin (18) poussé par le barreau (22) de l'étrier (2) s' écarte de sa position normale et la déformation élastique du ressort de torsion (16) assure la pression du contact entre le galet (21) et le contact fixe (5).In Figure 4, showing an exemplary embodiment of an end bracket (2) at rest, the rotation of the bracket (2) is provided by an axis (15). A torsion spring (16) co-axial with the axis (15) ends, at each end by a strand (17 and 18) shaped to bear on a spacer (19) integral with the movable assembly. One end of the bracket (2) supports an axis (20) around which pivots an auxiliary roller (21) made of copper-tungsten alloy, the other end of the bracket ends with a bar (22) which, in position rest, is aligned with the axis (15) and the spacer (19). When, following the movement of the moving element, the roller (21) comes into contact with a fixed contact (5) the stirrup (2) pivots about the axis (15), a strand (17) of the spring torsion (16) is supported on the spacer (19) while the other strand (18) pushed by the bar (22) of the stirrup (2) deviates from its normal position and the elastic deformation of the spring torsion (16) ensures the contact pressure between the roller (21) and the fixed contact (5).

Pour un déplacement de l'équipage mobile en sens inverse, les brins (17) et (18) travaillent respectivement en sens inverse à la manière décrite ci-dessus. L'utilisation d'un ressort de torsion (16) comme dispositif de rappel de l'étrier (2) rend la pression de contact entre le galet auxiliaire (21) et le contact fixe (5) proportionnelle à l'angle dont l'étrier (2) s'écarte de sa position de repos.For a displacement of the moving element in the opposite direction, the strands (17) and (18) work respectively in the opposite direction in the manner described above. The use of a torsion spring (16) as calliper return device (2) makes the contact pressure between the auxiliary roller (21) and the fixed contact (5) proportional to the angle from which the calliper (2) deviates from its rest position .

Pour de faibles écarts de l'étrier (2) par rapport à sa position normale de repos, les pressions de contact trop faibles peuvent être compensées par l'utilisation conjointe d'autres ressorts de traction, de compression ou de torsion.For small deviations of the caliper (2) from its normal rest position, the contact pressures which are too low can be compensated for by the joint use of other traction, compression or torsion springs.

Pour assurer la continuité du circuit électrique, une rondelle ondulée (23) en matériau bon conducteur d'électricité est introduite entre le galet auxiliaire (21) et chaque bras de l'étrier (2). Le courant peut ainsi être véhiculé du galet auxiliaire (21) jusqu'à une prise de courant (24).To ensure the continuity of the electrical circuit, a corrugated washer (23) made of a material that is a good conductor of electricity is introduced between the auxiliary roller (21) and each arm of the caliper (2). Current can thus be conveyed from the auxiliary roller (21) to an outlet (24).

Lorsque le galet auxiliaire (21) quitte le contact fixe (5) le ressort (16) ramène l'étrier (2) dans sa position de repos.When the auxiliary roller (21) leaves the fixed contact (5) the spring (16) returns the stirrup (2) to its rest position.

Sur la figure 5, reproduisant les différentes positions occupées par un équipage mobile pour passer d'un contact fixe (5) à un autre contact fixe (25), le schéma 5 A montre l'équipage mobile au repos sur le contact fixe (5).L'étrier (1), supportant les galets principaux (10) se trouve au milieu du contact fixe (5) et véhicule le courant de ligne IL à la tension de la prise (29), depuis le contact fixe (5) jusqu'à un conducteur principal (28). Les étriers d'extrémité (2) supportant les galets auxiliaires (21) sont respectivement désignés par (2G) et (21G) pour l'étrier et le galet auxiliaire situés à gauche de l'étrier central et par (2D) et (21D) pour l'étrier et le galet auxiliaire situés à droite de l'étrier central. Par l'intermédiaire des galets principaux (10) et de l'étrier central (1) les étriers d'extrémité (2G et 2D) et les galets auxiliaires (21G et 21D) sont au potentiel de la prise (29).In FIG. 5, reproducing the different positions occupied by a mobile assembly to pass from a fixed contact (5) to another fixed contact (25), the diagram 5A shows the mobile assembly at rest on the fixed contact (5 The bracket (1), supporting the main rollers (10) is located in the middle of the fixed contact (5) and carries the line current IL at the voltage of the socket (29), from the fixed contact (5) to a main conductor (28). The end stirrups (2) supporting the auxiliary rollers (21) are respectively designated by (2G) and (21G) for the stirrup and the auxiliary roller located to the left of the central stirrup and by (2D) and (21D ) for the caliper and the auxiliary roller located to the right of the central caliper. Via the main rollers (10) and the central bracket (1), the end brackets (2G and 2D) and the auxiliary rollers (21G and 21D) are at the potential of the socket (29).

Lorsque le dispositif d'entraînement déplace l'équipage mobile vers la droite, schéma 5B, pour passer du contact fixe (5) au contact fixe suivant (25) le galet auxiliaire (21G) vient buter contre le contact fixe (5) et l'étrier (2G) pivote autour de son axe (15) . Le circuit électrique reliant le contact fixe (5) au conducteur principal(28) est formé de deux branches parallèles d'inégales résistances. La branche de l'étrier d'extrémité (2G) dans laquelle l'impédance (26) est insérée ne conduit pas le courant; c'est la branche de l'étrier central (1) de résistance pratiquement nulle qui continue à véhiculer le courant de ligne IL depuis le contact fixe (5) jusqu'au conducteur principal (28).When the drive device moves the moving assembly to the right, diagram 5B, to pass from the fixed contact (5) to the next fixed contact (25) the auxiliary roller (21G) abuts against the fixed contact (5) and the 'caliper (2G) pivots around its axis (15). The electrical circuit connecting the fixed contact (5) to the main conductor (28) is formed by two parallel branches of unequal resistances. The branch of the end clamp (2G) in which the impedance (26) is inserted does not conduct the current; it is the branch of the central stirrup (1) of practically zero resistance which continues to convey the current of IL line from the fixed contact (5) to the main conductor (28).

Le schéma 5C représente l'équipage mobile au moment ou l'étrier central (1) vient de quitter le contact fixe (5) en coupant le courant de ligne IL dont le passage est assuré, par la suite, par la branche de l'étrier d'extrémité (2G) à travers l'impédance (26).Diagram 5C represents the moving part when the central stirrup (1) has just left the fixed contact (5) by cutting the line current IL, the passage of which is ensured, subsequently, by the branch of the end clamp (2G) through the impedance (26).

Le schéma 5D montre l'équipage mobile lorsque le galet auxiliaire (21D) de l'étrier d'extrémité (2D) aborde le contact fixe (25) alors que le galet auxiliaire (21G) de l'étrier de l'extrémité (2G) n'a pas encore quitté le contact fixe (5). Le courant de ligne IL parvenant au conducteur principal (28) est pratiquement conduit par moitié par la branche comprenant le galet auxiliaire (21G), l'étrier d'extrémité (2G) et l'impédance (26), l'autre moitié de courant de ligne passe à travers la branche comprenant le galet auxiliaire (21D), l'étrier d'extrémité (2D) et l'impédance (27). Si nous supposons que le potentiel de la prise (34) reliant le contact fixe (25) est supérieur au potentiel de la prise (29) reliant le contact fixe (5), il s'établit un courant de circulation IC du contact fixe (25) vers le contact fixe (5) qui passe successivement par le galet auxiliaire (21D), l'étrier (2D), les impédances (27) et (26), l'étrier (2G) et le galet auxiliaire (21G).Diagram 5D shows the moving assembly when the auxiliary roller (21D) of the end bracket (2D) approaches the fixed contact (25) while the auxiliary roller (21G) of the end bracket (2G ) has not yet left the fixed contact (5). The line current IL reaching the main conductor (28) is practically driven in half by the branch comprising the auxiliary roller (21G), the end clamp (2G) and the impedance (26), the other half of line current passes through the branch comprising the auxiliary roller (21D), the end bracket (2D) and the impedance (27). If we assume that the potential of the socket (34) connecting the fixed contact (25) is greater than the potential of the socket (29) connecting the fixed contact (5), a circulation current I C of the fixed contact is established (25) to the fixed contact (5) which passes successively through the auxiliary roller (21D), the calliper (2D), the impedances (27) and (26), the calliper (2G) and the auxiliary roller (21G ).

A la figure 5 E, l'étrier d'extrémité (2G) a quitté le contact fixe (5) et le galet auxiliaire (21G) a coupé le courant de circulation précité. Le courant de ligne IL, à la tension de la prise (34) est à nouveau véhiculé par l'étrier central (1) depuis le contact fixe (25) jusqu'au conducteur principal (28).In FIG. 5 E, the end bracket (2G) has left the fixed contact (5) and the auxiliary roller (21G) has cut the above-mentioned circulation current. The line current I L , at the voltage of the socket (34) is again conveyed by the central stirrup (1) from the fixed contact (25) to the main conductor (28).

Le schéma 5 F montre l'équipage mobile au repos devant le contact fixe (25). Par l'intermédiaire des galets principaux (10) et de l'étrier central (1), les étriers d'extrémité (2G) et (2D) et les galets auxiliaires (21G et 21D) sont au potentiel de la prise (34).Diagram 5F shows the moving part at rest in front of the fixed contact (25). Via the main rollers (10) and the central calliper (1), the end callipers (2G) and (2D) and the auxiliary rollers (21G and 21D) are at the potential of the socket (34) .

Claims (7)

1. Equipage mobile pour contacts temporaires comprenant au moins une rangée formée d'un ou de plusieurs galets principaux et au moins une rangée formée d'un ou de plusieurs galets auxiliaires, ces rangées de galets étant animées chacune d'un mouvement télescopique au moyen d'un dispositif à ressort pour appliquer avec une pression adéquate les galets (10,11,21) de l'équipage mobile sur les pistes (30,31) d'un contact fixe (5) en face duquel se trouve l'équipage mobile et ces rangées de galets pivotant chacune autour d'un axe de rotation pour faire rouler les galets (10,11,21) de l'équipage mobile sur les pistes (30,31) du contact fixe (5)
caractérisé en ce que des moyens sont prévus pour permettre une translation des galets auxiliaires (21) dans la direction des galets principaux (10) ou dans la direction opposée suivant des forces engendrées par les déplacements des galets auxiliaires (21) sur les pistes (30,31) du contact fixe (5).1. Movable equipment for temporary contacts comprising at least one row formed by one or more main rollers and at least one row formed by one or more auxiliary rollers, these rows of rollers being each driven by a telescopic movement by means a spring device for applying with adequate pressure the rollers (10,11,21) of the moving assembly on the tracks (30,31) of a fixed contact (5) opposite which is the crew mobile and these rows of rollers each pivoting about an axis of rotation to roll the rollers (10,11,21) of the mobile assembly on the tracks (30,31) of the fixed contact (5)
characterized in that means are provided to allow a translation of the auxiliary rollers (21) in the direction of the main rollers (10) or in the opposite direction according to forces generated by the displacements of the auxiliary rollers (21) on the tracks (30 , 31) of the fixed contact (5). 2. Equipage mobile pour contacts temporaires selon la revendication 1 caractérisé en ce que l'équipage mobile pour contacts temporaires est constitué de trois rangées de galets portées chacune par un étrier, en ce que un étrier central(l) portant les galets principaux (10,11) est animé d'un mouvement télescopique et en ce que les deux étriers d' extrémité (2), portant un ou des galets auxiliaires (21), sont animés chacun d'un mouvement limité de rotation autour d'un axe (15) disposé, parallèlement à l'axe de rotation (20) du ou des galets auxiliaires (21) de manière que le ou les galets auxiliaires (21) se rapprochent des galets principaux (10,11) sous l'action des forces engendrées, en cours du déplacement de l'équipage mobile d'un contact fixe de départ (5) vers un autre contact fixe d'arrivée (25), lorsque le ou les galets auxiliaires (21) de l'étrier (2) s'engage et sur une piste (31) du contact fixe d'arrivée (25) et de manière à ce que le ou les galets auxiliaires (21) s'écartent des galets principaux (10,11) sous l'action des forces engendrées lorsque le ou les galets auxiliaires (21) de l'étrier d'extrémité (2) sont sur le point de quitter la piste (31) du contact fixe de départ (5).2. Movable equipment for temporary contacts according to claim 1 characterized in that the mobile equipment for temporary contacts consists of three rows of rollers each carried by a bracket, in that a central bracket (l) carrying the main rollers (10 , 11) is driven by a telescopic movement and in that the two end stirrups (2), carrying one or more auxiliary rollers (21), are each driven by a limited movement of rotation about an axis ( 15) arranged, parallel to the axis of rotation (20) of the auxiliary roller (s) (21) so that the auxiliary roller (s) (21) come closer to the main rollers (10,11) under the action of the forces generated , during the movement of the moving assembly from a fixed starting contact (5) to another fixed arriving contact (25), when the auxiliary roller (s) (21) of the stirrup (2) engages and on a track (31) of the fixed arrival contact (25) and so that the auxiliary roller (s) (21) move away main rollers (10,11) under the action of the forces generated when the auxiliary roller (s) (21) of the end bracket (2) are about to leave the track (31) of the fixed start contact (5). 3. Equipage mobile pour contacts temporaires selon une des revendications 1 ou 2 caractérisé en ce que, pour chaque étrier d'extrémité (2), le débattement angulaire est réglable par un dispositif à excentrique modifiant la position du centre de rotation de l'étrier considéré.3. Movable equipment for temporary contacts according to one of claims 1 or 2 characterized in that, for each end bracket (2), the angular movement is adjustable by an eccentric device modifying the position of the center of rotation of the stirrup considered. 4. Equipage mobile pour contacts temporaires selon une des revendications 1 ou 2 caractérisé en ce que, pour chaque étrier d'extrémité (2), le débattement angulaire est réglable par un dispositif modifiant la position d'au moins une butée de fin de course de l'étrier d'extrémité (2). '4. Movable equipment for temporary contacts according to one of claims 1 or 2 characterized in that, for each end bracket (2), the angular movement is adjustable by a device modifying the position of at least one end of travel stop of the end bracket (2). '' 5. Equipage pour contacts temporaires selon une des revendications 1, 2, 3 et 4 caractérisé en ce que, pour chaque étrier d'extrémité (2), la pression de contact des galets (21) sur la piste (31) du contact fixe (5) et le rappel de l'étrier (2) vers sa position de repos sont assurés par un ou plusieurs ressort de torsion (16) coaxiaux à l'axe de rotation (15) de l'étrier d'extrémité (2).5. Crew for temporary contacts according to one of claims 1, 2, 3 and 4 characterized in that, for each end bracket (2), the contact pressure of the rollers (21) on the track (31) of the fixed contact (5) and the return of the stirrup (2) to its rest position are ensured by one or more torsion spring (16) coaxial with the axis of rotation (15) of the end stirrup (2) . 6. Equipage mobile pour contacts temporaires selon une des revendications 1, 2, 3, 4 et 5 caractérisé en ce que, pour chaque étrier d'extrémité (2), la pression de contact des galets (21) sur la piste (31) du contact fixe (5) et le rappel de l'étrier (2) vers sa position de repos sont assurés par un ou plusieurs ressort de traction dont au moins un point d'ancrage de chaque ressort de traction est coulissant.6. Movable equipment for temporary contacts according to one of claims 1, 2, 3, 4 and 5 characterized in that, for each end bracket (2), the contact pressure of the rollers (21) on the track (31) of the fixed contact (5) and the return of the stirrup (2) to its rest position are provided by one or more tension springs of which at least one anchor point of each tension spring is sliding. 7. Equipage mobile pour contacts temporaires selon une des revendications 1, 2, 3, 4, 5 et 6 caractérisé en ce que, pour chaque étrier d'extrémité (2), la pression de contact des galets (21) sur la piste (31) du contact fixe (5) et le rappel de l'étrier (2) vers sa position de repos sont assurés par un ou plusieurs ressorts de compression.7. Movable assembly for temporary contacts according to one of claims 1, 2, 3, 4, 5 and 6 characterized in that, for each end bracket (2), the contact pressure of the rollers (21) on the track ( 31) of the fixed contact (5) and the return of the caliper (2) to its rest position are provided by one or more compression springs.
EP79200685A 1979-11-21 1979-11-21 Electrical apparatus comprising a series of voltage taps and mobile selector equipment Expired EP0029467B1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE7979200685T DE2967539D1 (en) 1979-11-21 1979-11-21 Electrical apparatus comprising a series of voltage taps and mobile selector equipment
AT79200685T ATE16327T1 (en) 1979-11-21 1979-11-21 ELECTRICAL APPARATUS WITH A SERIES OF VOLTAGE TAPES AND MOVABLE SELECTOR EQUIPMENT.
EP79200685A EP0029467B1 (en) 1979-11-21 1979-11-21 Electrical apparatus comprising a series of voltage taps and mobile selector equipment
JP14809680A JPS5676126A (en) 1979-11-21 1980-10-22 Movable unit for temporary contact
ES496543A ES496543A0 (en) 1979-11-21 1980-11-04 PERFECTED MOBILE DEVICE FOR TEMPORARY ELECTRICAL CONTACTS.
PT72069A PT72069B (en) 1979-11-21 1980-11-17 ELECTRICAL APPARATUS COMPRISING A SERIES OF VOLTAGE SOCKETS AND A MOBILE SELECTOR CREW
US06/207,880 US4356359A (en) 1979-11-21 1980-11-18 Electrical apparatus comprising a series of current taps and variable switching gear
BR8007544A BR8007544A (en) 1979-11-21 1980-11-19 MOBILE EQUIPMENT FOR TEMPORARY CONTACTS
KR1019810000448A KR830005687A (en) 1979-11-21 1981-02-13 Electrical contact with series of currents and variable switching gear
KR2019840011706U KR840002854Y1 (en) 1979-11-21 1984-11-19 Electrical apparatus comprising a series of current taps and variable switching gear

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP79200685A EP0029467B1 (en) 1979-11-21 1979-11-21 Electrical apparatus comprising a series of voltage taps and mobile selector equipment
KR1019810000448A KR830005687A (en) 1979-11-21 1981-02-13 Electrical contact with series of currents and variable switching gear

Publications (2)

Publication Number Publication Date
EP0029467A1 true EP0029467A1 (en) 1981-06-03
EP0029467B1 EP0029467B1 (en) 1985-10-30

Family

ID=76159205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200685A Expired EP0029467B1 (en) 1979-11-21 1979-11-21 Electrical apparatus comprising a series of voltage taps and mobile selector equipment

Country Status (9)

Country Link
US (1) US4356359A (en)
EP (1) EP0029467B1 (en)
JP (1) JPS5676126A (en)
KR (2) KR830005687A (en)
AT (1) ATE16327T1 (en)
BR (1) BR8007544A (en)
DE (1) DE2967539D1 (en)
ES (1) ES496543A0 (en)
PT (1) PT72069B (en)

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EP0132662A1 (en) * 1983-07-22 1985-02-13 Transformatoren Union Aktiengesellschaft Load selector for tapped transformers
EP0146396A2 (en) * 1983-12-15 1985-06-26 Mitsubishi Denki Kabushiki Kaisha Change-over switch for an on-load tap changer
EP0151740A2 (en) * 1984-01-16 1985-08-21 Maschinenfabrik Reinhausen Gmbh Load changer for tapped transformers
EP0173771A1 (en) * 1984-09-05 1986-03-12 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Electrical contacts for oscillating yoke in a load selector
EP0185119A1 (en) * 1984-12-17 1986-06-25 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Load-breaking module with contact clamps for an on-load tap selector
EP0861494A1 (en) * 1995-11-13 1998-09-02 ABB POWER T & D COMPANY INC. Diverter switch and link system for load tap changer
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DE3407332A1 (en) * 1984-02-29 1985-08-29 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Load selector for stepping transformers having switching contacts which can be rolled off
DE3416050A1 (en) * 1984-04-30 1985-10-31 Transformatoren Union Ag, 7000 Stuttgart LOAD SELECTOR FOR STAGE TRANSFORMERS
DE102007023124B3 (en) * 2007-05-16 2008-10-02 Maschinenfabrik Reinhausen Gmbh switching arrangement
DE102010020040B4 (en) * 2010-05-11 2016-06-09 Maschinenfabrik Reinhausen Gmbh Switching arrangement for a transformer having a contact arrangement with a plurality of contact elements fastened to a switching shaft

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EP0099943A1 (en) * 1982-07-05 1984-02-08 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Multiple contact mobile device with rocker arm
EP0132662A1 (en) * 1983-07-22 1985-02-13 Transformatoren Union Aktiengesellschaft Load selector for tapped transformers
EP0146396A2 (en) * 1983-12-15 1985-06-26 Mitsubishi Denki Kabushiki Kaisha Change-over switch for an on-load tap changer
EP0146396A3 (en) * 1983-12-15 1985-08-14 Mitsubishi Denki Kabushiki Kaisha Change-over switch for an on-load tap changer
EP0151740A2 (en) * 1984-01-16 1985-08-21 Maschinenfabrik Reinhausen Gmbh Load changer for tapped transformers
EP0151740A3 (en) * 1984-01-16 1987-11-19 Siemens Aktiengesellschaft Berlin Und Munchen Load changer for tapped transformers
EP0173771A1 (en) * 1984-09-05 1986-03-12 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Electrical contacts for oscillating yoke in a load selector
US4638127A (en) * 1984-09-05 1987-01-20 Ateliers De Constructions Electriques De Charleroi (Acec) Societe Anonyme Electrical contacts for oscillating yoke of load selector
EP0185119A1 (en) * 1984-12-17 1986-06-25 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Load-breaking module with contact clamps for an on-load tap selector
EP0861494A1 (en) * 1995-11-13 1998-09-02 ABB POWER T & D COMPANY INC. Diverter switch and link system for load tap changer
EP0861494A4 (en) * 1995-11-13 1999-08-18 Abb Power T & D Co Diverter switch and link system for load tap changer
WO2002093600A1 (en) * 2001-04-20 2002-11-21 Maschinenfabrik Reinhausen Gmbh Load selector

Also Published As

Publication number Publication date
ES8202978A1 (en) 1982-03-01
JPS5676126A (en) 1981-06-23
EP0029467B1 (en) 1985-10-30
ATE16327T1 (en) 1985-11-15
DE2967539D1 (en) 1985-12-05
PT72069B (en) 1981-12-17
BR8007544A (en) 1981-06-02
KR830005687A (en) 1983-09-09
US4356359A (en) 1982-10-26
KR840002854Y1 (en) 1984-12-26
PT72069A (en) 1980-12-01
ES496543A0 (en) 1982-03-01

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