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    E-lesson

    Transformer oil – e-lesson #19 Maintanance Standards for Ester Fluids ( Synthetic & Natural Esters)

    Course:

    Hosted by: CS Narasimhan / Master's level

    This lesson discusses the maintenance and condition monitoring of ester-based transformer fluids. It covers the key aging parameters that affect the dielectric properties, paper quality, and heat transfer of the fluid. The lesson explains the various tests recommended by the IEC 62975 standard, categorizing them into routine, complementary, and investigative tests. It highlights the importance of on-site testing for certain parameters and the need to understand the compatibility and miscibility of the fluids. The lesson also delves into the significance of viscosity, water saturation, and oxidation stability, providing guidelines for reconditioning and reclamation. Finally, it compares the recommended limits for natural and synthetic ester fluids, noting the differences due to their chemical properties.

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    The lesson is intended for utility engineers/chemists, transformer and oil manufacturers, students and faculty of educational institutes, oil testing laboratories,utility staff, etc. It delivers a detailed comparison of Ester fluids and mineral oils with respect to Dielectric and heat transfer behaviour, design implications, performance benefits etc.

    After the live broadcasting, the lesson stays available on demand.

    About the author

    CS Narasimhan

    Dr. Narasimhan holds PhD in chemistry from a premier institute IIT Madras, Chennai (India), with a long experience of about 40 years. He has been working in corporate R&D centers of multinational companies ever since he completed his PhD in 1978.
    He was heading R&D at Savita Oil Technologies in Mumbai for 20 years, until his recent retirement.
    His R&D work includes: developing a variety of grades of transformer oils based on paraffinic oils, naphthenic oils, natural esters and synthetic esters,
    application development in transformers, developing additives for transformer oils, studying oxidation behavior, moisture dynamics in oil-filled transformers, studies on dielectric properties of mineral oils and esters (impulse & power frequency), insulation paper ageing studies in mineral oils and ester oils published papers in the recent ICDL conference in Rome and 9 papers in IEEE conferences on dielectric properties of ester oils and mineral oils, and more.
    He has published more than 30 papers, of which 15 are on transformer oils, and is proud of his six patents.
    He has been an invited speaker at conferences in India and abroad, as well as delivered lectures at seminars conducted by Weidman in Europe. He is a member of two IEC committees on oil standards and a member of two CIGRE committees on oils.

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