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    On-load tap changers (OLTC)

    Dr. Raka Levi gives the insight into on-load tap changers on three levels: basic, intermediate and master’s, all of which have their intended audience.

    To know more about the entire course, see the OLTC Course Brochure.

    Subscribe to the OLTC Course level which suits your needs best.

    OLTC first lesson illustration

    Basic Level

    Basic Level


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    Intermediate level

    Intermediate Level


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    Master level

    Advanced Level


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    All levels

    All Levels


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    About the author

    Raka Levi

    Dr. 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.

    Edis Osmanbašić

    Edis Osmanbasic has been an Application and Testing Specialist at DV Power, Sweden since 2010. His work involves the analysis and development of test methods for condition assessment of transformers, OLTCs, and generators. He is responsible for DV Power transformer test equipment field application and diagnostics of transformer test results and is also involved in defining and proposing the maintenance strategy for the HV equipment. Edis has published numerous papers on DRM methodology and transformer testing methods. He holds an MS
    in electrical engineering.

    DV Power

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