Life prediction for epoxy resin insulated transformer windings through accelerated aging tests

Q Zhuang, PHF Morshuis, X Chen, S Meijer, JJ Smit, Z Xu

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    8 Citations (Scopus)


    This investigation aims to perform a probabilistic prediction of the lifetime of epoxy resin insulation of transformer windings. To support the prediction, several accelerated electrical aging tests were conducted at different voltage levels on epoxy resin insulated transformer winding specimens. The lifetimes achieved from the tests show a ¿flat z-shaped¿ V-t (voltage vs. lifetime) curve and indicate the well known threshold stress effect. Since the operation stress is in the convex part of the V-t curve, the life exponent n was not predetermined, but estimated from a data pool obtained at the lowest voltage levels. As a result, the operation life and its confidence intervals were predicted from the breakdown data at these low voltage levels.
    Original languageUndefined/Unknown
    Title of host publicationProceedings of 2010 10th IEEE International conference on solid dielectrics (ICSD)
    Editors s.n.
    Place of PublicationPiscataway
    PublisherIEEE Society
    Number of pages4
    ISBN (Print)978-1-4244-7945-0
    Publication statusPublished - 2010
    Event2010 10th IEEE International conference on solid dielectrics (ICSD), Potsdam - Piscataway
    Duration: 4 Jul 20109 Jul 2010

    Publication series



    Conference2010 10th IEEE International conference on solid dielectrics (ICSD), Potsdam


    • Conf.proc. > 3 pag

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