Szukana fraza: [Abstrakt = "One of the reasons determining the replacement of a synthetic ester in a mineral oil in transformer is the willingness to increase fire safety. However, this exchange will never be complete, resulting in a mixture of both liquids in the transformer tank. In this situation, the analysis of the dielectric response in the frequency domain \(DFR\) of the transformer insulation, to determine the moisture cellulose insulation, is difficult. This difficulty results from the fact that the DFR method is based on the cellulose insulation immersed in a pure dielectric response patterns, most often mineral oil or synthetic ester, not in their mixture."]

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