Experimental model of aging mechanisms of on-load tap changer contacts

JJ Erbrink, E Gulski, JJ Smit, PP Seitz, R Leich

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

    19 Citations (Scopus)

    Abstract

    It is known that most failure of power transformers are related to aging effects of the on-load tap changer contacts. To understand the aging mechanisms and to develop knowledge rules to interpret different failure mechanisms a test model has been developed. In particular, the effect of the several aging stages of tap changer change-over selector contacts on dynamic resistance measurements (DRM) has been considered, by several measurements with aged tap changer contacts. These aging phases include clean contacts, contacts with an oil film layer, contacts with coking and contacts with pitting. Based on these experiments it is shown that the DRM method is very sensitive to aged change-over selector contacts of an on-load tap changer. In addition to laboratory experiments, the same measurements are performed on naturally aged change-over selector contacts at a Dutch utility.
    Original languageUndefined/Unknown
    Title of host publicationCMD 2008. International conference on condition monitoring and diagnosis, 2008.
    Editors s.n.
    Place of PublicationPiscataway
    PublisherIEEE Society
    Pages247-250
    Number of pages4
    ISBN (Print)978-1-4244-1621-9
    DOIs
    Publication statusPublished - 2008
    EventCMD 2008. International conference on condition monitoring and diagnosis, 2008, Beijing - Piscataway
    Duration: 21 Apr 200824 Apr 2008

    Publication series

    Name
    PublisherIEEE

    Conference

    ConferenceCMD 2008. International conference on condition monitoring and diagnosis, 2008, Beijing
    Period21/04/0824/04/08

    Keywords

    • conference contrib. refereed
    • Conf.proc. > 3 pag

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