Space charge in polyethylene under AC electric stress using the pulsed electroacoustic method

This paper reports on space charge in XLPE planar samples of approximately 220 /spl mu/m thick, subjected to dc 30 kV/mm and 1 Hz, 10 Hz and 50 Hz ac 30 kV/sub pk//mm conditions for 24 hours. Measurements of space charge were carried out using the pulsed electroacoustic (PEA) technique. In addition, experiments with higher applied electric stress of 60 kV/sub pk//mm at 50 Hz ac condition were also conducted. In order to investigate the effect of degassing on space charge distributions in samples under ac stress, both as-received and degassed, were used in this study.