Green Insulating Fluids provide some Challenges.

By
I.A.R. Gray-Oilwatch Transformer Services

Oilwatch Transformer Laboratories have adapted their testing protocols to accommodate ester fluid transformers by integrating specialized standards and analytical techniques tailored to the unique properties of natural and synthetic esters.
Overview of Ester Fluids in Transformers
Ester fluids—both natural and synthetic—are increasingly used in transformers due to their biodegradability, high fire safety, and superior moisture tolerance. However, their chemical behaviour differs significantly from traditional mineral oils, requiring adjustments in testing and maintenance strategies.
Oilwatch’s Adaptation Strategy
Oilwatch, a leading analytical laboratory in Southern Africa, has responded to this shift by modifying its transformer oil analysis protocols in the following ways:
• Incorporation of Ester-Specific Standards
Oilwatch now applies international standards such as IEC and IEEE for, ensuring accurate diagnostics and compliance with global benchmarks.
Please download the Technical Article published in the Energise Magazine for a better understanding on some of the Challenges related to Green Insulating Fluids.

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