EP0004662B1 - Sélecteur de prises actionné sous huile pour changeur de prises de transformateurs à prises - Google Patents

Sélecteur de prises actionné sous huile pour changeur de prises de transformateurs à prises Download PDF

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Publication number
EP0004662B1
EP0004662B1 EP19790101007 EP79101007A EP0004662B1 EP 0004662 B1 EP0004662 B1 EP 0004662B1 EP 19790101007 EP19790101007 EP 19790101007 EP 79101007 A EP79101007 A EP 79101007A EP 0004662 B1 EP0004662 B1 EP 0004662B1
Authority
EP
European Patent Office
Prior art keywords
tap
oil
insulating
control electrodes
transformers
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
EP19790101007
Other languages
German (de)
English (en)
Other versions
EP0004662A1 (fr
Inventor
Alexander Bleibtreu
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
Scheubeck GmbH and Co
Original Assignee
MASCHINENFABRIK REINHAUSEN Gebr SCHEUBECK & Co KG GmbH
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 Gebr SCHEUBECK & Co KG GmbH, Maschinenfabrik Reinhausen GmbH filed Critical MASCHINENFABRIK REINHAUSEN Gebr SCHEUBECK & Co KG GmbH
Publication of EP0004662A1 publication Critical patent/EP0004662A1/fr
Application granted granted Critical
Publication of EP0004662B1 publication Critical patent/EP0004662B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • H01H33/24—Means for preventing discharge to non-current-carrying parts, e.g. using corona ring

Definitions

  • the invention relates to an oil operated tap selector for tap changers of tap transformers, as it is described in the preamble of the associated claim.
  • control electrodes of such tap changers with additional insulation to increase the dielectric strength.
  • the control electrodes are generally wrapped with paper, which then provides a substantial improvement in the dielectric strength after the oil impregnation (DE-C-1 903 583).
  • the method of wrapping with paper encounters difficulties with control electrodes, e.g. B. are intended only for shielding terminal lugs of individual contacts or for shielding individual screw connections and which should also be attachable to special brackets (DE-A-2 420 288). Control electrodes of this type cannot be wrapped with paper because of their special shape and because of the required possibility of being attached to special holders.
  • control electrodes that cannot be wrapped with paper due to their shape, they are nevertheless provided with a layer of insulating material.
  • the rather complex process of spinal sintering is then used for this.
  • the surface of the control electrode is provided with a thin plastic layer which is permanently adhering to the surface and, after being applied, can practically no longer be removed from the surface of the electrode (DE-A-1 613 643).
  • the object of the invention is to achieve a further improvement of the described control electrodes of tap changers. This object is achieved according to the invention by the means specified in the characterizing part of patent claim 1.
  • the advantage achieved by the invention is, in particular, that even with very small control electrodes and control electrodes whose shape is not suitable for wrapping with paper, and with control electrodes that can be plugged onto special holders, an increase in the dielectric strength is achieved, without having to wrap these control electrodes with paper.
  • the press chip molded part can be designed as a shell that z. B. is arranged around the terminal lug and into which the actual control electrode is pushed.
  • control electrode and molded part can also be joined together from the outset, so that they can be plugged together on special holders.
  • the effect of the pressboard molded parts is approximately the same as for wrapping with paper. After inserting the tap changer in the oil, they are completely soaked in oil, so that this also increases the dielectric strength between the parts of different potential.
  • insulating rods 3 are fastened to an upper cage ring 1 and a lower cage ring 2 and carry the individual step contacts 4.
  • the insulating rods 3 are fastened to the cage rings by means of screws 5.
  • the step contacts 4 seated on the insulating rods 3 are spherical to the inside of the step selector. On the outside, they are each provided with a connecting lug 6 for connecting the supply lines.
  • the sharp-edged parts of the fastening screws 5 are shielded with a control electrode 7.
  • a molded part 8 made of pressboard is arranged in a form-fitting manner around this control electrode.
  • a control electrode 9 and 91 is arranged around each of the connection lugs.
  • control electrodes 9 and 91 are also each surrounded by a molded part 10, 11, also made of pressboard. These molded parts 8, 10 and 11 bear in a form-fitting manner on the control electrodes 7, 9 and 91, respectively, in the area of the control electrode which is decisive for the control of the electric field.
  • the molded part 10 can also be designed as a shell from the start with the step contact 4 sitting together on the insulating rod 3, so that when the actual control electrode 91 is attached, it has to be pressed into the shell.
  • control electrode 9 and molded part 10 can also be used be fixed together with the step contact 4 from the start.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Claims (2)

1. Sélecteur d'échelons fonctionnant dans l'huile pour commutateur d'échelons de transformateurs à échelons, sélecteur d'échelons dans lequel les différents contacts d'échelons sont placés sur des barreaux isolants disposés suivant un cercle et dans lequel ces barreaux isolants sont vissés sur un anneau de cage supérieur et un anneau de cage inférieur, les vis de fixation des barreaux isolants et les cosses de raccordement des contacts d'échelons étant entourés d'électrodes de commande spéciales, sélecteur d'échelons caractérisé en ce que des pièces de forme isolantes (8, 10, 11), notamment en prés- span, épousant la forme des électrodes de commande (7, 9, 91) sont disposées autour de celles-ci.
2. Sélecteur d'échelons selon la revendication 1. caractérisé en ce que les électrodes de commande (91) ainsi que leurs pièces de forme isolantes (11) et amovibles sont susceptibles d'être enfilées sur des saillies élastiques (12), placées sur les contacts d'échelons (4).
EP19790101007 1978-04-05 1979-04-03 Sélecteur de prises actionné sous huile pour changeur de prises de transformateurs à prises Expired EP0004662B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7810069U 1978-04-05
DE19787810069 DE7810069U1 (de) 1978-04-05 1978-04-05 Unter oel betriebener stufenwaehler fuer stufenschalter von stufentransformatoren

Publications (2)

Publication Number Publication Date
EP0004662A1 EP0004662A1 (fr) 1979-10-17
EP0004662B1 true EP0004662B1 (fr) 1981-08-26

Family

ID=6690182

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790101007 Expired EP0004662B1 (fr) 1978-04-05 1979-04-03 Sélecteur de prises actionné sous huile pour changeur de prises de transformateurs à prises

Country Status (4)

Country Link
EP (1) EP0004662B1 (fr)
JP (1) JPS54134323A (fr)
AT (1) AT367563B (fr)
DE (1) DE7810069U1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3801152A1 (de) * 1988-01-16 1989-07-27 Reinhausen Maschf Scheubeck In einer isolierstoffwand sitzende kontaktanordnung fuer stufenwaehler von stufentransformatoren
DE4139227A1 (de) * 1991-11-23 1993-05-27 Slamecka Ernst Vakuumschaltrohr
DE9407087U1 (de) * 1994-04-28 1995-08-24 Reinhausen Maschf Scheubeck Lastwähler
FI106156B (fi) * 1999-01-18 2000-11-30 Abb Transmit Oy Keskijaennitek Kentänohjain

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE677190C (de) * 1935-06-04 1939-06-21 Siemens Schuckertwerke Akt Ges Stufenwaehler fuer Regeltransformatoren
NL94688C (fr) * 1958-05-02 1960-06-15
FR90241E (fr) * 1965-07-13 1968-01-24
AT263154B (de) * 1966-11-15 1968-07-10 Elin Union Ag Schirmelektrode an Kontaktstücken und deren Befestigungsteilen von Stufenwählern, Wendern, Grobstufenumschaltern, Grobstufenwählern und an Lastschalterisolierbottichen
JPS5119224B1 (fr) * 1971-03-19 1976-06-16
DE2301778A1 (de) * 1973-01-15 1974-07-18 Transformatoren Union Ag Stufenwaehler in kaefigbauart
DE2339076C2 (de) * 1973-08-02 1975-07-03 Maschinenfabrik Reinhausen Gebrueder Scheubeck Kg, 8400 Regensburg Kontaktanordnung mit Abschirmelektrode
US4131775A (en) * 1976-11-04 1978-12-26 Westinghouse Electric Corp. Compressed-gas circuit-interrupters of the puffer-type having improved supporting, shielding and assembly features

Also Published As

Publication number Publication date
AT367563B (de) 1982-07-12
ATA245879A (de) 1981-11-15
EP0004662A1 (fr) 1979-10-17
DE7810069U1 (de) 1979-09-13
JPS54134323A (en) 1979-10-18

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