Polymeric cable terminators under accelerated aging in a fog chamber

The paper presents the results of fog chamber tests done to compare the contamination performance of 25kV class outdoor polymeric cable terminators. The effects of weathershed material and design, method of stress relief and experimental conditions on the contamination performance are discussed. It is shown that the weathershed material and design rather than the method of stress relief has a greater influence on the contamination performance. The results indicate that the method of stress relief does not improve the contamination performance under normal operating stress. For terminators using good track resistant materials, satisfactory performance can be obtained even with a 50% reduction in the leakage distance presently provided.