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There is no single Duval method. Which triangle or pentagon to use is decided by fluid, then equipment, then the question you are answering — a practical selection guide.
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Learn how to integrate IEC 60599, IEEE C57.104, and CIGRE TB 771 into a unified DGA interpretation workflow. Master the triage, quick check, and deep diagnosis methodology used by senior diagnosticians.
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A practical introduction to insulating liquid analysis for asset managers and engineers. Learn how DGA, water content, acidity, dielectric strength, DDF, and interfacial tension reveal your transformer's health.
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Five millilitres of headspace in a rigid, partly filled sample bottle strips 49 % of the hydrogen out of a transformer oil sample by Henry-Ostwald partitioning. Why correct sampling is a measurement, not a packaging detail — and where consulting judgment refines the standard's conservative numbers in the field.
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