| 摘要 |
This invention relates to power transformers. More particularly, this invention pertains to a method and apparatus for detecting the degree of degradation of paper insulation in a transformer by determining the concentra- tion of furaldehyde in the transformer oil. A reagent for detecting the presence of furaldehyde in transformer oil comprising: (a) a primary amine selected from the group consisting of aniline, toluidine, anisidine and aminophenol or an amine; (b) a second component comprising approxi- mately 15 to 33 (weight to volume) percent of acetic acid alone, or in combination with citric acid; from approxi- mately 67 to 85 (volume) percent of a halogenated hydrocar- bon selected from the group consisting of dichloromethane, chloroform, carbontetrachloride, dichloroethane, trichloroethane, tetrachloroethane, trichloroethylene and tetrachloroethylene; approximately 4 (weight to volume) percent of salicylic acid; and approximately 1 (weight to volume) percent of an anti-oxidant; and (c) a third compo- nent comprising approximately 25 (weight to volume) percent citric acid in distilled water.
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