Conference Proceeding

High temperature PD degradation characteristics in bulk and interfaces of insulating materials for power cables

Dept. of Electr. Eng., Nagoya Univ.
02/2000; DOI:10.1109/ICPADM.2000.875682 ISBN: 0-7803-5459-1 pp.264 - 267 vol.1 In proceeding of: Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on, Volume: 1
Source: IEEE Xplore

ABSTRACT In order to check the possibility of raising the service
temperature of installed power cables, PD degradation characteristics in
materials for cable insulation and their interfaces were investigated at
high temperatures (70-110°C). With increasing temperature, the tree
inception voltage of XLPE bulk decreased below 90°C and increased
above 90°C. The degradation at the interfaces was also investigated
and the EPR surface showed peculiar type of degradation with void
formation. Possible causes of the void formation are increase of
pressure of gas due to decomposition of EPR, additives and impurities,
desorption from EPR surface and so on

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Keywords

additives
 
cable insulation
 
EPR surface
 
impurities
 
PD degradation characteristics
 
peculiar type
 
Possible causes
 
power cables
 
temperatures
 
void formation
 
XLPE bulk