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    E-lesson

    OLTC Course – e-lesson #8 – Special cases of OLTC testing

    OLTC Course - e-lesson #8 - 850 x 400 illustration
    Course: Master’s level

    Hosted by: Raka Levi / Master's level

    Eighth lesson of the OLTC Course is the second lesson on the Master's level, as well as the final lesson of the entire course, in which Dr. Raka Levi discusses special OLTC constructions and particular test results expected for those.

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    Load tap changers have gone through various design changes over the time and application of test techniques to particular configurations, like regulators, are discussed. Special emphasis is given to remanent magnetism and demagnetization procedures.

    Keywords: dynamic test results, diagnostics, series transformer, booster winding, bias winding, demagnetization, remanent magnetism

     

    About the author

    Raka Levi

    Raka Levi

    Dr. Levi spent his entire career in diagnostic testing transformers and other substation apparatus, while the last 15 years dealing with tap changers. He is senior member IEEE and vice-chairman of the working group for revision of Guide for testing power transformers. Raka Levi consulted clients on all 5 continents in the field of condition assessment and substation monitoring.

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