| 摘要 |
PROBLEM TO BE SOLVED: To provide a diagnostic method of internal fault of oil-filled electric equipment, by which the fault in a main body of oil-filled electric equipment equipped with transformer main body insulation oil and selection switch room oil mutually separated with a rubber-like dividing membrane can be diagnosed in a simple way and also a release source of a low-boiling gas such as acetylene gas can be specified. SOLUTION: The diagnostic method includes processes of: determining whether acetylene gas and methyl vinyl acetylene gas permeate the rubber-like dividing membrane separating the transformer main body insulation oil and the selection switch room oil mutually; extracting specimen of the transformer main body insulation oil from the oil-filled electric equipment and detecting hydrocarbon gas component at least with the carbon number of 2 to 5 dissolved in the specimen oil; and specifying the release source of acetylene gas, based on the results of determining the presence or absence of permeating acetylene gas and methyl vinyl acetylene gas, and also based on the presence or absence of the detection of acetylene gas or methyl vinyl acetylene gas in the process of detecting hydrocarbon gas component. COPYRIGHT: (C)2008,JPO&INPIT
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