Selection of insulator type, number of insulator string and air space is the main basis of transmission line insulation coordination.

输电线路的绝缘配合主要是选择绝缘子型式、绝缘子串的片数和空气间隙。

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Test and research result shows that the retrofit of backward V insulators can be carried out for 500 kV suspension insulator string, and when it is .

火力发电厂及变电所中悬垂绝缘子串片数的选择是电气设计中必须的步骤和容易产生混乱的难点，因此本文对此进行了研究。

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The bending deformation of V-shape composite insulator string under strong wind may cause the risk of ball head falling off and string falling apart.

型复合绝缘子串在大风作用力下受到弯曲变形，有球头脱落造成掉串的风险。

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