• DocumentCode
    783218
  • Title

    Dielectric Behavior and Stabilization of Insulation Oils in EHV Current Transformers

  • Author

    Duval, M. ; Crine, J.-P.

  • Author_Institution
    Institut de recherche d´´Hydro-Québec Varennes, Canada
  • Issue
    2
  • fYear
    1985
  • fDate
    4/1/1985 12:00:00 AM
  • Firstpage
    437
  • Lastpage
    441
  • Abstract
    The causes of a number of explosions of EHV current transformers in service on the Hydro-Qu6bec 765 kV network have been investigated. Thermal runaway related to unexpectedly high dielectric losses in one of the types of oils used was diagnosed. Electrical instability of the oil was related to dissolved-meta content rather than to conventional oxidation of the oil. A new way of stabilizing the oil is proposed, consisting in the addition of a metal deactivator in oil.
  • Keywords
    Current transformers; Dielectric losses; Dielectrics and electrical insulation; Moisture; Oil insulation; Oxidation; Petroleum; Power transformer insulation; Reactive power; Testing;
  • fLanguage
    English
  • Journal_Title
    Electrical Insulation, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0018-9367
  • Type

    jour

  • DOI
    10.1109/TEI.1985.348868
  • Filename
    4156790
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=783218