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The selection of climbing distance when 66kV Insulators are used in DC systems needs to attract special attention, neither should there be frequent tripping caused by the selection of climbing distance according to the characteristics of communication pollution flash, nor do you have to blindly increase the climbing distance, the umbrella skirt is too dense is not conducive to the self-cleaning of the insulator, but also easy to form a bridge between the umbrella skirt, which may have little effect on improving the pollution flash and wet flash voltage, and even pull out seedlings
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