Artificial contamination withstand voltage characteristics of polymer insulators

摘要

(1)Polymer insulators have higher contamination withstand voltages compared with porcelain ones.rnWithstand voltage of polymer insulators obtained by the clean fog procedure was proportional tornabout -1/5 power of SDD, showing almost the same tendencies with the case of porcelain ones.rnContamination withstand voltage of a polymer insulator increases almost linearly with its effectivernlength. (2)Longer time lapse after contamination resulted in higher contamination withstand voltage ofrnpolymer insulators. (3)Contamination withstand voltages of polymer insulators reduced with the increase of NSDD inrnalmost same manner with porcelain ones. The DC withstand voltage with Roger's Kaolin was 75%rnof that with Tonoko. This value is almost the same with the case of porcelain insulators.