During the long-term operation of the transmission line, a layer of impurities is attached to the surface of the transmission line, which causes certain damage to the insulation performance of the insulator. Therefore, in order to ensure the insulation performance of the insulator, the cleaning work can be performed to insulate the insulator surface. The impurities are removed. Moreover, while cleaning, the insulator should be carefully inspected to see if there are any defects such as cracks and damage on the surface. When problems are found, they should be replaced in time.
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