Measurement of Dielectric Parameters of XLPE Cables

Abstract

The present study shows changes of dielectric parameters depended on degradation of high voltage insulation material. The article deals with the measurement of dielectric parameters of XLPE cables in the initial stage of ageing and cables after services degradation. The measurement was carried out using isothermal relaxation current analysis (IRC analysis) and measurign capacity in 50 Hz frequecy. IRC analysis used direct voltage step with 100 V magnitude and capacity and dissipation factor measurements applied voltage from 500V to 2 000V.