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- W2120229538 abstract "Moisture and ageing strongly influence the properties of oil/paper insulation system of power transformer. Moisture measurement in oil sample generally gives inconclusive information since oil/paper moisture equilibrium is temperature dependent and takes a long time to be in equilibrium. Direct moisture measurement of paper sample is not practicable for in-service transformers. The measurement and evaluation of the dielectric response and conductivity is one possible way of diagnosing a transformer insulation condition. In a recent research project, polarization and depolarization current measurement has been used for assessing the condition of oil/paper insulation. The polarization and depolarization current (PDC) analysis is a nondestructive testing method for determining the conductivity and moisture content of insulation materials in a transformer. On the basis of this analysis it is possible to take further actions like oil-refurbishment, drying or replacement of the winding of the transformer. This paper presents a description of the PDC technique with the physical and mathematical background and some results of PDC measurements on several transformers. Analyses and interpretation of the field test data are also presented in this paper." @default.
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- W2120229538 date "2004-02-01" @default.
- W2120229538 modified "2023-10-18" @default.
- W2120229538 title "Investigation of polarization and depolarization current measurements for the assessment of oil-paper insulation of aged transformers" @default.
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- W2120229538 doi "https://doi.org/10.1109/tdei.2004.1266329" @default.
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