Abstract
The paper presents the results of the analysis of the gas content in 444 units of oil-filled equipment, which revealed spark and creeping discharges, as well as discharges with high energy density. The values of gas ratios and the percentage of gases in oil samples are calculated. Nomograms and graphical areas of defects are constructed. The description of the most characteristic damages in the equipment is given. Diagnostics of the equipment using the Duval triangle is carried out. The results obtained make it possible to increase the reliability of defect type recognition based on the results of the analysis of gases dissolved in oil.
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