Temperature dependence of electrical tree inception from water tree degradation

Inception of electrical tree from water-tree degradation at high temperature

“…We have been studying electrical-tree inception and propagation and associated phenomena mainly by using a water-needle electrode [1][2][3][4][5]. One of our previous results is shown in Figure 1.…”

“…Figure 3 shows the effect of AC prestressing on impulse tree inception voltage [5]. In the samples with water tree degradation, the AC prestressing reduced the impulse tree inception voltage by ca.…”

“…The AC electrical-tree inception voltage becomes higher with the water-tree area and this is explained in terms of electrical-field moderation [e.g. [4][5][6]. Abstract: In order to clarify the mechanism of electrical-tree inception which often determines the remaining life of power cables, we have been investigating electrical tree inception and propagation from water-tree degradation in polyethylene.…”