Effect of Ambient Temperature on the Performance of Contaminated DC Insulators
- 1 April 1984
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electrical Insulation
- Vol. EI-19 (2) , 129-134
- https://doi.org/10.1109/tei.1984.298784
Abstract
Effect of ambient temperature simulating different weather conditions has been investigated on insulators of different shapes. It has been observed that for a given salinity of contaminating solution, the amount of salt contained in the contaminated-surface layer is strongly temperature dependent. This is attributed to the viscosity-temperature characteristics of the electrolytic solution. dc flashover voltage of contaminated insulators reduces by about 0.7 ~ 1.0% per degree centigrade rise in temperature. dc arc V-𝒾 characteristics are, however, temperature independent in the investigated range. The observed temperature dependence of dc withstand voltag of contaminated insulators is attributed exclusively to the change of resiudal resistance and a good agreement holds between the measured and the estimated values. The influence of polarity on contamination withstand characteristics is independent of temperature variations in the investigated range.Keywords
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