| Title |
Characteristics of AC Treeing for Three Epoxy Resins for High Voltage Heavy Electric Machine Appliances |
| DOI |
http://doi.org/10.5370/KIEE.2018.67.10.1322 |
| Keywords |
GIS Spacer ; AC treeing ; Reliability evaluation ; Epoxy resin ; Evaluation of insulation life |
| Abstract |
In this paper, the reliability test of three kinds of epoxy resin for GIS Spacer, which is a high voltage based heavy electric machine, AC electrical treeing experiments were performed. Three types of epoxy resins, Araldite B41, CT 5531 CI and B46, have slight viscosity differences. An non-uniform electric field, E=1149.4kV/mm, as the needle to plate electrode, a power source with a frequency of 1kHz was applied to the tree electrode for accelerated deterioration. The treeing phenomena of the three kinds of epoxy resin all initiated, propagated, and destroyed by the branch tree. Epoxy Resin B46 was 145 times longer than B41 and 53 times longer than CT 5531CI. I think that the choice of epoxy resin is very important in choosing high voltage heavy electric machine insulation materials. |