Polarization and depolarization current response of XLPE insulation subjected to wet-aging

This paper describes the polarization and depolarization current responses from XLPE cable insulation with and without water trees. Comparison of the polarization current with the time of polymer aging suggests that the analysis of the polarization current alone could be used to determine the operating state of the insulation. The advantage of this approach is that the polarization current provides consistent results and eliminates the need to acquire and analyze the depolarization currents as a function of the poling time