Title :
On the mechanism of electrical breakdown initiated by the treeing: measurement of the space charge field formed in an LDPE film
Author :
Fukuzawa, Nasahiro ; Iwamoto, Mitumasa
Author_Institution :
Dept. of Electr. Eng., Kyushu Sangyo Univ., Fukuoka, Japan
Abstract :
The authors investigated both the tree-initiation voltage and the length of the path generated in an LDPE (low-density polyethylene) specimen due to the electrical treeing under a needle-plane electrode system. They then measured both thermally stimulated current (TSC) and thermally stimulated surface potential (TSSP) generated in an LDPE specimen, which is biased by the application of either DC or AC voltage. The authors also investigated the mechanism of electrical breakdown initiated by the treeing by studying the relationship between the tree-initiation voltage determined by the experiment and the space charge field determined by the thermally stimulated electrical measurements. It was concluded that the distance between the centroid of the space charge formed in an LDPE film and the tip of the needle electrode was approximately the same as the length of the path generated by the electrical treeing
Keywords :
electric breakdown of solids; organic insulating materials; polymer films; space charge; surface potential; thermally stimulated currents; LDPE film; electrical breakdown; electrical treeing; low-density polyethylene; needle-plane electrode system; path length; space charge field; thermally stimulated current; thermally stimulated surface potential; tree-initiation voltage; AC generators; Breakdown voltage; Charge measurement; Current measurement; DC generators; Electric breakdown; Electric variables measurement; Electrodes; Polyethylene; Space charge;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1991., Proceedings of the 3rd International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-87942-568-7
DOI :
10.1109/ICPADM.1991.172019
