EP0132662B1 - Sélecteur de charge pour transformateurs à échelons - Google Patents

Sélecteur de charge pour transformateurs à échelons Download PDF

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Publication number
EP0132662B1
EP0132662B1 EP84107912A EP84107912A EP0132662B1 EP 0132662 B1 EP0132662 B1 EP 0132662B1 EP 84107912 A EP84107912 A EP 84107912A EP 84107912 A EP84107912 A EP 84107912A EP 0132662 B1 EP0132662 B1 EP 0132662B1
Authority
EP
European Patent Office
Prior art keywords
contact
contacts
switching contacts
switching
contact carrier
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
Application number
EP84107912A
Other languages
German (de)
English (en)
Other versions
EP0132662A1 (fr
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union AG
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 Transformatoren Union AG filed Critical Transformatoren Union AG
Priority to AT84107912T priority Critical patent/ATE23074T1/de
Publication of EP0132662A1 publication Critical patent/EP0132662A1/fr
Application granted granted Critical
Publication of EP0132662B1 publication Critical patent/EP0132662B1/fr
Expired 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 can simultaneously be pivoted on the circular arc.
  • the respective outer switching contacts are each 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 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. From these conditions, however, it follows that the lay distance in the rest position between each resistance contact and the respectively adjacent fixed contact is relatively small, based on the center distance between two adjacent fixed contacts. In order to control the highest possible operating voltages, however, the largest possible gaps, d. H. The largest possible distances between the contact rollers and the adjacent fixed contacts that do not carry any current are required.
  • the resistance contacts are designed to be pivotable, wherein when the movable contact system moves to one side, the resistance contact abutting the fixed contact from the other side when touching the fixed contact Contact is pivoted away from the middle switching contact. This results in a greater distance for the intermediate position when switching the known load selector between the pivoted resistance switching contact and the main switching contact lying in the middle than in the rest position. For a certain assumed diameter of the contact system, this leads to a larger stroke distance in the rest position than can be achieved by contact arrangements with non-pivoting resistance contacts.
  • the invention is based on the object of creating a contact arrangement for load selectors which, for a given diameter of the contact system, enables a further increase in the impact distance between the switching contacts and the adjacent fixed contacts which are not carrying any load current.
  • the distance of the outer switch contacts in a spread position during a switching operation is about 25% larger than in the rest position and that the levers carrying the outer switch contacts are pivotable about axes arranged symmetrically to the middle switch contact.
  • the two levers carrying the outer switching contacts are identical to one another and fork-shaped on both arms and have two coupling devices with play that are displaced in the axial direction against one another via two congruently or symmetrically designed arms are coupled together, the switching contacts themselves being designed as rollers.
  • the middle switching contact is expediently carried by a one-armed lever which can be pivoted about one of the two axes guiding the two-armed lever, and is supported on the contact carrier by a spring which generates the contact pressure.
  • axles guiding the levers are guided at a greater distance past the fixed step contacts than the axes of the roles representing the switching contacts and that the surface of the fixed step contacts is bulged in the direction of the pivot axis of the contact carrier.
  • the contact arrangement according to the invention is very advantageous for load selectors, because on the one hand through the coupling of the outer Wegkon. clock-bearing two-armed lever, the distance between the outer switching contacts during a switching process is relatively large, and thus large distances between the fixed contacts can be bridged, and because on the other hand, due to the contact of the outer switching contacts with the selected fixed contact in the rest position, large distances between the movable switching contacts and the fixed contacts that are adjacent to them are observed.
  • Figures 1 to 7 show a contact arrangement according to the invention in the successively passed through positions during a switchover.
  • FIG. 8 shows a section through such a contact arrangement along the planes connecting the contact roller axes and the pivot axes of the levers to one another.
  • step contacts On the inside of an insulating cylinder 1, which is only shown in section in section, fixed step contacts are arranged on a circle at equal intervals, of which only the two step contacts 2 and 3 lie in the section shown.
  • the stage contacts 2 and 3 are electrically connected to taps assigned to them of a fine-stage winding of a transformer.
  • a contact carrier 4 with switch contacts 5, 6 and 7 is pivotable about the axis of the insulating cylinder 1.
  • the switch contact 5 rests against one of the step contacts.
  • the switch contacts 5, 6 and 7 are designed as rollers and are mounted on axes 8. 9 and 10.
  • the axis 8 guiding the switching contact 5 is carried by a one-armed lever 11, which in turn is pivotably seated on an axis 13 together with a two-armed lever 12 carrying the switching contact 7.
  • Another two-armed lever 14 carries the switching contact 6 and sits on an axis 15.
  • the arms of the levers 14 and 12 opposite the switching contact 6 and 7 are coupled with one another in such a way that they take each other in opposite directions of rotation.
  • Bolts 16 or meshing gear segments serve as a coupling in slots 17 with play. Both the arms of the levers 12 and 14 and the lever 11 are fork-shaped to accommodate the switching contacts 5, 6 and 7 and the springs loading them.
  • Springs 18 pull the mutually coupled ends of the levers 12 and 14 into the contact carrier 4 such that the arms of the levers 12 and 14 carrying the switch contacts 6 and 7 are constantly loaded with a moment in the direction of the switch contact 5.
  • the switch contact 5, in turn, is loaded in the direction of the insulating cylinder 1 by a spring (not shown) and, due to the geometrical arrangement of the lever 11 within the contact carrier 4, can essentially only be moved in the radial direction of the insulating cylinder 1.
  • Leaf springs 19 press in the axial direction on the axes 8, 9 and 10 leading the switching contacts 5, 6 and 7 and ensure a low-resistance connection of the switching contacts to their derivatives.
  • Fig. 2 shows the position shortly before the switch contact 7 has completely reached the step contact 2. At the same time, however, there is still contact between the switching contact 5 and the step contact 2.
  • the switch contact 5 runs from the step contact 2 and the load current is taken over by the switch contact 7.
  • the switch contacts 6 and 7 are spread far apart from the middle switch contact 5, so that when the switch contact 5 expires from the step contact, as shown in FIG. 3, the switch contact 6 is already immediately before the step contact 3.
  • the individual switching contacts 5, 6 and 7 should each have the highest possible switching capacity when the switching arc is interrupted in the event of a contact separation. It is advantageous for this that the contact separation takes place at the highest possible speed so that a sufficiently large contact distance is achieved in a sufficiently short time. In view of this, it is advantageous to bulge the stepped contacts 2 and 3 in the direction of the axis of the insulating cylinder 1, so that 'the pivoting movement of the two-armed lever starts earlier at the end of a switchover than the respective outer switch contacts 6 and 7 over the edge of the currently touched step contact expires.

Landscapes

  • Contacts (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (8)

1. Sélecteur de charge pour des transformateurs à gradins pour commuter d'une prise à la suivante, avec des plots de contact (2, 3) reliés aux prises et disposés suivant un cercle, ainsi qu'avec des contacts de commutateur (5, 6, 7) susceptibles d'être basculés simultanément sur l'arc de cercle, de trois branches de courant sur un support de contacts commun (4), du type
- dans lequel tous les contacts de commutateur (5, 6, 7) sont, dans leur position de repos, portés respectivement au potentiel du même plot de contact (2, 3),
- dans lequel, lors du basculement du support de contacts (4), le contact de commutateur médian (5) n'est déplacé, par rapport au support de contacts (4), que sensiblement en direction radiale,
- dans lequel, lors du basculement du support de contacts (4), les deux contacts de commutateur extérieurs (6, 7) sont basculés, par rapport au support de contacts (4), sur des leviers (14, 12) articulés sur ledit support, et
- dans lequel les déplacements des contacts de commutateur (5, 6, 7) par rapport au support de contacts (4) sont commandés par les plots de contact fixes (2, 3) qui représentent en même temps des cames,
caractérisé par le fait,
- que chacun des deux contacts de commutateur extérieurs (6, 7) est porté par l'extrémité libre d'un bras d'un levier à deux bras (14, 12),
- que les extrémités des autres bras de ces deux leviers à deux bras (14, 12) sont accouplées (16, 17) entre elles de telle manière
- que les deux contacts de commutateur extérieurs (6. 7) sont basculés, lorsque le support de contacts (4) est dans sa position de repos, sous l'effet de la force d'un ressort (81), jusqu'aux flancs du plot de contact fixe (2, 3) qui a été sélectionné, et
- que lors de la montée de l'un des deux contacts de commutateur extérieurs (6, 7) sur un plot de contact fixe (2, 3), les bras des leviers qui portent les contacts de commutateur extérieurs (6, 7) sont basculés, à l'encontre de la force des ressorts (18), dans des directions opposées entre elles, les bras des leviers (14, 12) qui portent les contacts de commutateur extérieurs (6, 7) étant écartés du contact de commutateur médian (5).
2. Sélecteur de charge selon la revendication 1, caractérisé par le fait que la distance des contacts de commutateur extérieurs (6, 7), dans la position écartée pendant l'opération de commutation, est au moins de 25 % supérieure que dans la position de repos.
3. Sélecteur de charge selon la revendication 1 et 2, caractérisé par le fait que les leviers (14, 12) qui portent les contacts de commutateur extérieurs (6, 7) sont susceptibles d'être basculés autour d'axes (15, 16) qui sont disposés symétriquement par rapport au contact de commutateur médian (5)..
4. Sélecteur de charge selon la revendication 1 à 3, caractérisé par le fait que les deux leviers (14, 12) qui portent les contacts de commutateur extérieurs (6, 7) sont identiques entre eux et présentent une forme en fourche à leurs deux bras, et ils sont accouplés entre eux, avec jeu, par l'intermédiaire de deux dispositifs d'accouplement (16, 17) réalisés de façon congruante ou symétrique entre eux, par rapport au contact de commutateur médian (5).
5. Sélecteur de charge selon la revendication 1 à 4, caractérisé par le fait que les contacts de commutateur (5, 6, 7) sont tous réalisés sous la forme de galets.
6. Sélecteur de charge selon la revendication 1 à 5, caractérisé par le fait que le contact de commutateur médian (5) est porté par un levier à un bras (11) articulé sur un axe (15) passant par l'un des leviers à deux bras (14), et il prend appui contre le support de contacts (4) par l'intermédiaire d'un ressort qui produit la pression de contact.
7. Sélecteur de charge selon la revendication 1 à 6, caractérisé par le fait que les axes (13, 15) qui sont portés par les leviers (11, 12, 14) passent avec une distance plus importante par rapport aux plots de contacts fixes (2, 3), comparativement aux axes (8, 9, 10) des galets qui représentent les contacts de commutateur (5, 6, 7).
8. Sélecteur de charge selon la revendication 1 à 7, caractérisé par le fait que la surface des plots de contacts fixes (2, 3) est galbée en direction de l'axe de basculement du support de contacts (4).
EP84107912A 1983-07-22 1984-07-06 Sélecteur de charge pour transformateurs à échelons Expired EP0132662B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84107912T ATE23074T1 (de) 1983-07-22 1984-07-06 Lastwaehler fuer stufentransformatoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3326549 1983-07-22
DE19833326549 DE3326549A1 (de) 1983-07-22 1983-07-22 Lastwaehler fuer stufentransformatoren

Publications (2)

Publication Number Publication Date
EP0132662A1 EP0132662A1 (fr) 1985-02-13
EP0132662B1 true EP0132662B1 (fr) 1986-10-22

Family

ID=6204710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107912A Expired EP0132662B1 (fr) 1983-07-22 1984-07-06 Sélecteur de charge pour transformateurs à échelons

Country Status (4)

Country Link
EP (1) EP0132662B1 (fr)
JP (1) JPS6039809A (fr)
AT (1) ATE23074T1 (fr)
DE (2) DE3326549A1 (fr)

Families Citing this family (3)

* 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
DE102010015051B4 (de) 2010-04-15 2012-06-14 Maschinenfabrik Reinhausen Gmbh Mechanischer Schaltkontakt
CN103314422B (zh) * 2011-01-20 2016-01-20 赖茵豪森机械制造公司 分接开关

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL147571B (nl) * 1971-05-03 1975-10-15 Smit Nijmegen Electrotec Belastingsomschakelaar of belastingsomschakelaar-fijnkiezer met met de beweegbare contacten meebewegende overbruggingsimpedanties.
DE2213264C2 (de) * 1972-03-18 1974-03-28 Maschinenfabrik Reinhausen Gebrueder Scheubeck Kg, 8400 Regensburg Lastumschalter für Stufentransformatoren
BE821312A (fr) * 1974-10-22 1975-02-17 Commutateur
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
EP0132662A1 (fr) 1985-02-13
JPS6039809A (ja) 1985-03-01
DE3461037D1 (en) 1986-11-27
ATE23074T1 (de) 1986-11-15
DE3326549A1 (de) 1985-02-07

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