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    E-lesson

    Transformer Oil – e-lesson #4 – Mineral Oils in Service

    Transformer oil course - e-lesson #4 - illustration
    Course: Intermediate level

    Hosted by: C. S. NARASIMHAN / Intermediate level

    This lesson covers the storage, handling, and sampling of transformer oils. It discusses best practices for transporting and storing oils, including keeping drums upright during transport and horizontal during storage. The lesson also explains the differences between miscibility and compatibility of oils, and the importance of ensuring compatibility with transformer components. Proper procedures for filling new equipment with oil are outlined, including the use of dedicated equipment and maintaining specific temperature and vacuum conditions. The lesson concludes by providing the recommended limits for key oil parameters after filling, before energizing the transformer.

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    The lesson discusses aspects of unused mineral oil after its receipt by the end-user, such as storage, sampling, testing before and after filling into an equipment and the limits to parameters. The lesson also deals with the process and precautions for filling oil into a transformer.

    Join us and learn how the oil should be stored and handled, about testing different oils for compatibility in case a new oil of a different vendor is used for topping up in an equipment and, finally, about the limits for oil parameters after filling and before energizing a transformer.

    Keywords: storage, handling, filling, oil compatibility

    About the author

    CS NARASIMHAN 300 x 300

    C. S. NARASIMHAN

    Dr. Narasimhan is a Ph.D. in Chemistry with over 30 years of experience in Industrial R&D. While working as a technical director in a major oil company manufacturing transformer oils, he led project teams for developing and commercializing mineral oils for EHV applications and ester fluids. He is a member of several IEC and CIGRE committees dealing with transformer oils. He has several publications and patents to his credit.

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