Insulator should withstand power frequency voltage, switchingvoltage and lightning impulse voltage, shouldn't flashover under pollution.

绝缘子运行中要能够承受工频电压、操作过电压 、 雷电过电压的作用, 并在污秽条件下不发生闪络.

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Operating voltage can seriously influence the over - voltage, arising from the transformer under the lightning impulse.

工作电压会严重地影响变压器遭受雷击时产生的过电压.

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