Healthiness of a power transformer is very vital in today’s developing world for ensuring reliable and quality power supply to consumers. Transformer insulation fails mainly due to ingress of moisture and various traditional methods have been utilized to determine the moisture content in oil. Yet, identification of moisture which impregnates into the paper/ pressboard insulation or mechanical displacements of transformer windings due to accumulated short circuit forces during electrical faults, through a nondestructive technique is still a complex task. Polarization Depolarization Current (PDC) analysis is an emerging and a reliable technique with which these flaws can be clearly identified and can even be effectively discriminated (whether it is in oil or pressboard) while the conventional methods (like Breakdown Voltage Test on oil sample) identify moisture in oil only. In this research study an attempt has been made to develop a simplified insulation model of a transformer and an experimental setup is implemented for acquiring the PDC waveforms of the transformer model at different insulation conditions. The flaws have represented through their possible impacts on the dielectric capacitance and resistance of insulation. Careful analysis of the observed variations in PDC patterns indicate and signify the behavioral changes of the flawed transformer dielectric systems. © Research India Publications.