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Transient phenomena of space charge distributions in polypropylene laminated paper

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2 Author(s)
Maeno, T. ; Commun. Res. Lab., Minist. of Posts & Telecommun., Koganei, Japan ; Fukunaga, K.

In a multilayer insulator made of two or more materials with different dielectric constants and conductivities, internal space charge accumulates at their interfaces. If the local field is increased by the accumulated charge, the electric durability of the insulator should be decreased. In this paper, we describe the space charge accumulation measured when using oil-impregnated PPLP (polypropylene laminated paper)-which consists triple layers; kraft paper, polypropylene (PP), kraft paper-was subjected to a strong dc electric field. The experimental results suggest that internal space charge accumulates at both surfaces of a PP layer and that the electric field in the kraft paper layers disappears

Published in:

Conduction and Breakdown in Solid Dielectrics, 1998. ICSD '98. Proceedings of the 1998 IEEE 6th International Conference on

Date of Conference:

22-25 Jun 1998