The measurement of dielectric loss angle is one of the main methods in the preventive tests for the insulation of electrical equipment.
电气设备绝缘预防性试验中的介质损失角正切的测量，则是一种使用较多而且对判断绝缘较为有效的方法。
Insulators icing and electrical tests methods, which is not proposed at any standards by now, are important for the external insulation design of HV transmission lines in severe icing districts.
绝缘子覆冰及其电气特性试验方法是严重复冰地区外绝缘设计的重要基础，但至今尚无该试验方法的标准。
Insulators icing and electrical tests methods, which is not proposed at any standards by now, are important for the external insulation design of HV transmission lines in severe icing districts.
绝缘子覆冰及其电气特性试验方法是严重复冰地区外绝缘设计的重要基础，但至今尚无该试验方法的标准。
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