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This paper discusses the chemical and dielectric methods of analysis of aging of paper oil insulation due to copper corrosion which occurs in presence of reactive and corrosive sulphur in transformer oil. Results of Chemical Analysis and dielectric measurements are presented and discussed for understanding the usefulness of these methods in arriving at a comprehensive method to explain the effects...
Moisture content influences the dielectric properties of paper oil insulation of power transformers. The Polarization/Depolarization current measurements help to understand the dielectric response and conductivity of paper-oil insulation system. This unique concept facilitates the dissipation factor measurement over a wide frequency range. The results provide information on insulation condition such...
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