This guide applies to mineral oil-immersed transformers and addresses: a) The theory of combustible gas generation in a transformer b) The interpretation of gas analysis c) Suggested operating procedures d) Various diagnostic techniques, such as Key Gases, Rogers Ratios, Duval Triangle, and other methods e) Case studies and examples f) Evaluation criteria and guidelines g) A bibliography of related literature
This guide applies to silicone-immersed transformers in which the silicone fluid was the fluid supplied when the transformer was originally manufactured. This guide also addresses the following: a) The theory of combustible gas generation in a silicone-immersed transformer; b) Recommended procedures for sampling and analysis; c) The interpretation of Gas Analysis; d) Recommended actions based on the interpretation of the results and e) A bibliography of related literature.