Title :
Effect of liquid impregnation on electrical tree initiation in XLPE
Author :
Shimizu, N. ; Tanaka, H.
Author_Institution :
Dept. of Electr. & Electron. Eng., Meijo Univ., Nagoya, Japan
fDate :
4/1/2001 12:00:00 AM
Abstract :
The tree initiation voltage of impregnated crosslinked polyethylene (XLPE) with a dielectric liquid is drastically improved compared to normal XLPE for both ac and impulse voltage application. It is considered that liquid fills the polymer free volume, and removes space for electrons to be accelerated to high energy. The experimental results support that collision impact of electrons accelerated in polymer free volume is the dominant cause of electrical tree initiation, and also show that liquid impregnation is a promising way to improve performance and prolong the life of polymeric insulating materials
Keywords :
XLPE insulation; impregnated insulation; impulse testing; insulation testing; XLPE; collision impact; electrical tree initiation; impulse voltage application; liquid impregnation; polymer free volume; polymeric insulating materials; Acceleration; Argon; Cable insulation; Dielectric liquids; Dielectrics and electrical insulation; Electrons; Helium; Polymers; Trees - insulation; Voltage;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
