EP0151740B1 - Sélecteur de charge pour transformateurs à prises - Google Patents

Sélecteur de charge pour transformateurs à prises Download PDF

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Publication number
EP0151740B1
EP0151740B1 EP84115085A EP84115085A EP0151740B1 EP 0151740 B1 EP0151740 B1 EP 0151740B1 EP 84115085 A EP84115085 A EP 84115085A EP 84115085 A EP84115085 A EP 84115085A EP 0151740 B1 EP0151740 B1 EP 0151740B1
Authority
EP
European Patent Office
Prior art keywords
contact
contacts
switching
slide
guide rails
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP84115085A
Other languages
German (de)
English (en)
Other versions
EP0151740A2 (fr
EP0151740A3 (en
Inventor
Werner Widmann
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.)
Maschinenfabrik Reinhausen GmbH
Original Assignee
Maschinenfabrik Reinhausen GmbH
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 Maschinenfabrik Reinhausen GmbH filed Critical Maschinenfabrik Reinhausen GmbH
Priority to AT84115085T priority Critical patent/ATE52357T1/de
Publication of EP0151740A2 publication Critical patent/EP0151740A2/fr
Publication of EP0151740A3 publication Critical patent/EP0151740A3/de
Application granted granted Critical
Publication of EP0151740B1 publication Critical patent/EP0151740B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • 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

Definitions

  • the invention relates to load selectors for step transformers for switching from one tap to the next with fixed step contacts arranged on a circle, connected to the taps, and with switching contacts of three current branches on a common contact carrier, which are simultaneously pivotable on the circle and represented by rollers.
  • the respective outer switch contacts are in series with a contact resistance. This results in the so-called "flag switching", which is particularly favorable with regard to the switching power that is controlled at the individual contacts.
  • the operating current of the transformer flows from a fixed contact via the main switch contact located in the middle, while the two outer switch contacts represent resistance contacts and are de-energized in the rest position of the load selector.
  • at least one of the movable switch contacts must be in contact with a fixed contact in each intermediate position during the adjustment process. This means that in an intermediate position one resistance contact must run onto the current-carrying fixed contact earlier than the main switching contact runs from this fixed contact.
  • the second resistance contact must already touch the following fixed contact before the current-carrying resistance contact of the previously carrying fixed contact has expired.
  • the width of the fixed contacts must be greater than half the distance from contact rollers that represent resistance contacts, and the distance of these contact rollers must be greater than the distance between two adjacent, fixed contacts.
  • a disadvantage of the first-mentioned contact arrangement is the relatively bulky structure, which additionally complicates use when very high operating voltages occur.
  • the contact arrangement with contact rollers mounted on angle levers is unsatisfactory in that it requires different cam tracks for controlling the individual contacts assigned to the same contact carrier. This results in a relatively large manufacturing effort, which is further increased by the need to take into account the possible manufacturing tolerances that occur.
  • the invention is based on the object of creating a contact arrangement for load selectors which has a compact structure and enables a largely smooth-surface design for the contact carrier and the fixed contacts and at the same time allows greater manufacturing tolerances.
  • the contact carrier has guide rails aligned radially in the circle of the stepped contacts for at least two contact carriages, in that a first contact carriage carries a main switching contact and another contact carriage carries two resistance contacts flanking the main switching contact in the pivoting direction on both sides, that operationally occurring, opposing movements of the contact carriage on the guide rails are limited by stops on the contact carriage itself in both directions, so that when the stops abut each other, the spring contacts assigned to the switching contacts load the current-carrying switching contact, and that the guide rails and the contact carriage mutually interlocking leaders.
  • the contact slide carrying the main switching contact is arranged between two guide rails and that a box-like contact slide comprising this arrangement serves as a common carrier for the two resistance contacts.
  • pins protruding transversely to the swivel direction and to the direction of the spring forces from the contact slide carrying the main switch contact engage in elongated holes in the box-like contact slide and, together with the ends of the elongated holes, represent the stops for limiting the slide movements in the radial direction.
  • Advantageous embodiments of the invention consist in the fact that each of the contact slits is constantly radially outwards by spring force is pressed that an end stop for the box-like contact carriage is provided on at least one guide rail, which secures this contact carriage during assembly before sliding off the guide rails.
  • contact carriages are supported among one another and on the guide rails via roller bearings.
  • the features according to the invention enable a very advantageous, simple structure for a load selector because, in the rest position and in the first part of the switching process, the main switching contact and the switching carriage assigned to it are supported on the fixed contact and because as long as neither of the two resistance contact rollers touches one of the fixed contacts, the switching slide of the resistance contacts is supported radially on the switching slide of the main switching contacts. However, as soon as the contact roller of the main switching contact has run from the fixed contact, the switching slide of the main switching contact is supported radially on the switching slide of the resistance contacts, so that both switching slides are then supported radially via the resistance contact roller just touching a fixed contact.
  • Fixed step contacts 1 are arranged in a circle in a manner not shown, known, wherein they are carried by insulating rods or an insulating cylinder forming a cylindrical cage.
  • the fixed step contacts 1 are galvanically connected to taps of a fine step winding.
  • a main switch contact is located on each of the step contacts 1, which in turn is galvanically connected to a load line.
  • the main switch contact 3 is formed by a roller rotatably mounted on an axis 10 and, together with a contact slide 13 between guide rails 6, can be displaced in the radial direction until the roller contacts the step contact 1 by means of a spring 14.
  • the guide rails 6 are parts of a frame 11, which in turn is supported by an insulating tube 2 mounted centrally to the cage. The insulating tube 2 is rotated in a manner not shown via a step-by-step manual transmission.
  • the frame 11 with the guide rails 6 and the contact slide 13 are surrounded by a box-shaped contact slide 9.
  • the contact slide 9 carries on it axles 10 the main switch contact 3 flanking resistance contacts 4 and 5 in the direction of the switching movement.
  • the resistance contacts 4 and 5 are also designed as rollers.
  • Each of the resistance contacts 4 and 5 usually forms a series connection with a series resistor, which in turn is parallel to the main switching contact 3, so that it leads the load current between one or briefly two step contacts 1 and the load line, not shown, in certain switching positions.
  • the box-like contact slide 9 is pushed by compression springs 12 in the direction of the fixed step contacts 1. To limit this movement, pins 16 protruding transversely to the switching direction from the contact slide 13, which engage in elongated holes 15 in the contact slide 9. As a result, in the rest position shown in FIG. 2, the switching slide 9 is supported radially and the contact force exerted by the compression spring 14 on the main switching contact 3 is increased by adding the forces generated by the compression springs 12.
  • end stops 17 are provided at the end of at least one of the guide rails, which the radial Limit displacement of the contact carriage 9 and thereby also indirectly hold the contact carriage 13 via the pins 16 projecting into the elongated holes 15.
  • the placement and lifting of the contact rollers can be controlled so that the contact roller of the main switching contact 3 always lifts and touches on the outer edges of the fixed step contact 1, while the rollers of the resistance contact 4 and 5 each about Lift off or put on halfway between the outer edge and the center of the fixed contacts.
  • the erosion caused by the arc on the surface of the fixed contacts can be distributed over a larger total area of this surface than if, for example, all three contact rollers each run up and down on the outer edges of the fixed contacts.

Landscapes

  • Contacts (AREA)
  • Electronic Switches (AREA)
  • Vehicle Body Suspensions (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Protection Of Transformers (AREA)
  • Regulation Of General Use Transformers (AREA)

Claims (7)

1. Sélecteur de charge pour des transformateurs à prises, pour la commutation d'une prise à la suivante, comportant des contacts fixes (1) de prises disposés sur un cercle et reliés aux prises, et des contacts de commutation (3, 4, 5) de trois voies de courant, que l'on peut faire pivoter simultanément sur un cercle et qui sont représentés par des galets et sont situés sur un porte-contacts commun, et dans lequel
tous les contacts de commutation (3, 4, 5) appliquent, dans leur position de repos, respectivement les potentiels due même contact (1) d'une prise,
lors du pivotement du support de contact, les contacts de commutation (3, 4, 5) chargés par la force d'un ressort (12,14) sont déplacés sensiblement uniquement dans la direction radiale par rapport au porte-contacts, et
les déplacements des contacts de commutation (3, 4, 5) par rapport au porte-contacts sont commandés par les contacts fixes (1) des prises, qui représentent simultanément des cames, caractérisé par le fait
que le porte-contacts comporte des glissières (6) dirigées radialement par rapport au cercle des contacts (1) des prises, pour au moins deux curseurs de contact (9, 13),
qu'un premier curseur de contact (13) porte un contact principal de commutation (3) et qu'un autre curseur de contacte (9) porte deux contacts à résistance (4, 5), qui flanquent des deux côtés le contact principal de commutation (3) dans la direction de pivotement,
que des déplacements antagonistes, qui se produisent pendant le fonctionnement, des curseurs de contact (9, 13) sur les glissières (6) sont limités dans les deux directions par des butée (15, 16) prévues sur les glissières de contact (15, 16) elles-mêmes de sorte que, lorsque les butées (9, 13) viennent s'appliquer l'une contre l'autre, respectivement toutes les forces des ressorts (12, 14), associées à tous les contacts de commutation (3, 4, 5) chargent celui des contacts de commutation (3, 4, 5), qui véhicule précisément le courant, et
que les glissières (6) et les curseurs de contact (9, 13) s'engagent l'un dans l'autre avec guidage réciproque.
2. Sélecteur de charge suivant la revendication 1, caractérisé par le fait que le curseur de contact (13), qui porte le contact principal de commutation (3), est disposé entre deux glissières (6) et qu'un curseur de contact (9) en forme de boîte, qui entoure ce dispositif, sert de support commun pour les deux contacts à résistance (4, 5).
3. Sélecteur de charge suivant la revendication 2, caractérisé par le fait que des tétons (16), qui font respectivement saillie transversalement par rapport à la direction de pivotement et par rapport à la direction des forces des ressorts, à partir du curseur de contact (13) qui porte le contact principal de commutation (3), s'engagent dans des trous longitudinaux (15) ménagés dans le curseur de contact en forme de boîte (9), ces tétons (16) et les extrémités des trous allongés (15) représentant les butées servant à limiter les déplacements en sens opposés du curseur sur les glissières (6).
4. Sélecteur de charge suivant l'une des revendications 1 à 3, caractérisé par le fait que chacun des curseurs de contact (9, 13) est repoussé en permanence radialement vers l'extérieur par la force d'un ressort (12, 14).
5. Sélecteur de charge suivant l'une des revendications 2 à 4, caractérisé par le fait qu'il est prévu, sur au moins une glissière (6) d'un châssis (11), une butée d'extrémité (17), qui est prévue pour le curseur de contact en forme de boîte (9) et empêche ce curseur de contact (9) de s'échapper par glissement des glissières (6), lors du montage.
6. Sélecteur de charge suivant l'une des revendications 1 à 5, caractérisé par le fait que les curseurs de contact (9, 13) prennent appui l'un sur l'autre et sur les glissières (6) par l'intermédiaire de roulements.
7. Sélecteur de charge suivant l'une des revendications 1 à 6, caractérisé par le fait que l'application des galets des contacts de commutation (3,4, 5) et leur écartement est commandé par la disposition des trous allongés (15) et des tétons (16) de sorte que le galet du contact principal de commutation s'applique sur le bord extérieur du contact respectif (1) d'un prise, roule le long de la périphérie sur la surface de contact de ce contact (1) et s'écarte au niveau de l'autre bord extérieur de cette surface, et que les galets des contacts à résistance s'écartent et s'appliquent dans la zone respective de la surface des contacts, entre le bord extérieur correspondant et le centre des contacts (1) des prises.
EP84115085A 1984-01-16 1984-12-10 Sélecteur de charge pour transformateurs à prises Expired - Lifetime EP0151740B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84115085T ATE52357T1 (de) 1984-01-16 1984-12-10 Lastwaehler fuer stufentransformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3401297 1984-01-16
DE19843401297 DE3401297A1 (de) 1984-01-16 1984-01-16 Lastwaehler fuer stufentransformatoren

Publications (3)

Publication Number Publication Date
EP0151740A2 EP0151740A2 (fr) 1985-08-21
EP0151740A3 EP0151740A3 (en) 1987-11-19
EP0151740B1 true EP0151740B1 (fr) 1990-04-25

Family

ID=6225071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84115085A Expired - Lifetime EP0151740B1 (fr) 1984-01-16 1984-12-10 Sélecteur de charge pour transformateurs à prises

Country Status (4)

Country Link
EP (1) EP0151740B1 (fr)
JP (1) JPS60161604A (fr)
AT (1) ATE52357T1 (fr)
DE (2) DE3401297A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3416050A1 (de) * 1984-04-30 1985-10-31 Transformatoren Union Ag, 7000 Stuttgart Lastwaehler fuer stufentransformatoren
DE3833126C2 (de) * 1988-09-29 1995-11-30 Reinhausen Maschf Scheubeck Lastwähler für Stufentransformatoren
DE10312176B3 (de) 2003-03-19 2004-06-09 Maschinenfabrik Reinhausen Gmbh Lastumschalter für einen Stufenschalter
DE102010020040B4 (de) * 2010-05-11 2016-06-09 Maschinenfabrik Reinhausen Gmbh Schaltanordnung für einen Transformator mit einer an einer Schaltwelle befestigten Kontaktanordnung mit mehreren Kontaktelementen
BR112013016129A2 (pt) * 2011-01-20 2018-07-10 Reinhausen Maschf Scheubeck comutador de derivação do tipo seletor de carga para comutação ininterrupta entre derivações de bobinagem de um transformador abaixador
CN106992066B (zh) * 2017-05-08 2018-09-18 国网浙江省电力公司温州供电公司 一种主动式有源降噪装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE504507A (fr) * 1950-08-01
DE2914928C2 (de) * 1979-04-12 1983-02-24 Maschinenfabrik Reinhausen Gebrüder Scheubeck GmbH & Co KG, 8400 Regensburg Kontaktanordnung für Lastwähler von Stufentransformatoren
DE2967539D1 (en) * 1979-11-21 1985-12-05 Acec Electrical apparatus comprising a series of voltage taps and mobile selector equipment

Also Published As

Publication number Publication date
DE3482074D1 (de) 1990-05-31
DE3401297A1 (de) 1985-07-18
ATE52357T1 (de) 1990-05-15
EP0151740A2 (fr) 1985-08-21
EP0151740A3 (en) 1987-11-19
JPS60161604A (ja) 1985-08-23

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