Title :
Tree-inception in the three-layer dielectrics
Author :
Lebedev, S.M. ; Gockenbach, E.
Author_Institution :
Tomsk Polytech. Univ., Russia
Abstract :
The experimental results of study of the tree-inception time (τi) in the divergent field for the three-layer dielectrics are presented in this paper. It is shown that the tree-inception time may be essential increased due to the application of dielectric barriers with high permittivity. It is determined that the tree-inception time depends on the barrier position in the insulating gap and it has a maximum at the optimal barrier position. In doing so, the tree-inception length (li) has a minimum value at this barrier position. Good agreement between the coefficient of the local field nonuniformity and the tree-inception time or the tree-inception length was found.
Keywords :
dielectric materials; electric breakdown; trees (electrical); barrier position; dielectric barriers; high permittivity; insulating gap; local field nonuniformity; three-layer dielectrics; tree-inception time; Conducting materials; Dielectric breakdown; Dielectric materials; Dielectrics and electrical insulation; Electrodes; Erbium; Microscopy; Needles; Thermal stresses; Trees - insulation;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2003. Annual Report. Conference on
Print_ISBN :
0-7803-7910-1
DOI :
10.1109/CEIDP.2003.1254937
