This method is used by SDMyers and references the IEEE Standard C57.104 in the IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers.The ANSIIEEE C57.104 standards, the most popular guides for the interpretation of gases generated in oil-immersed transformers, and the IEC-Duval triangle method are integrated to develop the proposed power transformer fault diagnosis method.The key dissolved gases, including H 2, CH 4, C 2 H 2, C 2 H 4, C 2 H 6, and total combustible gases (TCG), suggested by ASTM D3612s instruction for DGA is investigated.
![]() The new Megger Baker MTR105 hand-held static motor tester is designed for performing multifunctional tests on motors. A brief review on the interpretation of DGA in transformers is presented, with a special emphasis on the Duval Triangle method. It is shown how the accuracy of DGA laboratory results can affect the reliability of DGA diagnosis. The minimum gas levels in service above which diagnoses may be attempted are indicated, as well as the gas levels observed before failure. Duval Triangle Tool How To Use SuchOne purpose of this paper is therefore to indicate in more detail how to use such coordinates. Another purpose is to present the most recent developments made at CIGRE concerning gas levels in service. It does not address the case of DGA in load tap changer (LTC) accessories, for which specialized diagnostic programs are available, or which is treated elsewhere.
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