Effect of liquid impregnation on electrical tree initiation in XLPE

Citation
N. Shimizu et H. Tanaka, Effect of liquid impregnation on electrical tree initiation in XLPE, IEEE DIELEC, 8(2), 2001, pp. 239-243
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Eletrical & Eletronics Engineeing
Journal title
IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
ISSN journal
1070-9878 → ACNP
Volume
8
Issue
2
Year of publication
2001
Pages
239 - 243
Database
ISI
SICI code
1070-9878(200104)8:2<239:EOLIOE>2.0.ZU;2-7
Abstract
The tree initiation voltage of impregnated crosslinked polyethylene (XLPE) with a dielectric liquid is drastically improved compared to normal XLPE fo r both ac and impulse voltage application. It is considered that liquid fil ls the polymer free volume, and removes space for electrons to be accelerat ed to high energy. The experimental results support that collision impact o f electrons accelerated in polymer free volume is the dominant cause of ele ctrical tree initiation, and also show that liquid impregnation is a promis ing way to improve performance and prolong the life of polymeric insulating materials.