STP998: Criteria for the Interpretation of Data for Dissolved Gases in Oil from Transformers (A Review)

    Griffin, PJ

    Pages: 19    Published: Jan 1988


    Abstract

    The analysis of gases dissolved in oil has been used as a diagnostic tool for many years to determine the condition of transformers. The criteria used in evaluating dissolved gas-in-oil data are reviewed. The criteria are based on experience from failed transformers, transformers with incipient faults, laboratory simulations, and statistical studies. The interpretation of results is enhanced by including specific information on a particular transformer, including its history. Comparison of a particular transformer of concern with a population of similar transformers provides additional information as regards “normal” gassing behavior. The interpretation of dissolved gas-in-oil data is not a simple matter and requires the integration of numerous criteria. Diagnostic gases for silicone fluids are also discussed.

    Keywords:

    mineral oil, transformer oil, silicone fluid, dissolved gases, fault gases, combustible gases, gas solubility, key gases, ratios, overheating, corona, arcing


    Paper ID: STP26424S

    Committee/Subcommittee: D27.02

    DOI: 10.1520/STP26424S


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