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This paper used 220kV porcelain-clad arrester defect at heavy contamination areas as a case, to research potential distribution by the means of high-pressure test and simulation. It has comprehensive analyzed the reasons that the defect of the arrester design is unreasonable. The paper reseached potential distribution of the new design arrester for heavy contamination areas. At last, the paper gives reasonable structure of 220kV Porcelain-clad Arrester for heavy contamination areas to ensure the system safe and stable operation. Keywords—arrester; heavy contamination areas; potential distribution; uniformity coefficient calculation

Research of Potential Distribution Defect about 220kV Porcelain-clad Arrester for Heavy Contamination Areas