Transformer oil – e-lesson #18 – A detailed comparison of Ester fluids and mineral oils
Event Details:
Join us on July 16th at Transformers Academy!
This lesson provides a detailed comparison of ester fluids and mineral oils used in transformers, focusing on their dielectric and heat transfer properties, design implications, and performance benefits. It examines the permittivity differences between the two liquids and how that impacts electrical stress distribution. The lesson also compares the lightning impulse behavior, AC breakdown, and streamer characteristics, highlighting the superior performance of mineral oils under highly non-uniform field conditions. However, under realistic transformer configurations, ester fluids demonstrate comparable dielectric performance. The thermal behavior of ester fluids is discussed, showing their higher operating temperatures but the ability to leverage this for increased transformer loading capacity. The lesson also covers the enhanced insulation life provided by ester fluids due to their moisture management capabilities. Finally, the presentation touches on the growing trend of retrofitting existing mineral oil-filled transformers with ester liquids.
Content of this lesson is fully vendor agnostic but it is sponsored by Ergon!
Transformer oil course - lesson 18 - 16th July (sponsored by ERGON)
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