This standard applies to single suspension insulator string made from ceramic or tempered glass material on side phase, which are used in a variety of regions, environmental temperatures, altitudes, tower types, and insulator types. This standard can also apply to the middle phase and single or double tension insulator strings. However, all the insulators should belong to the same type and are from the same material. Moreover, the insulator surface needs to be dry and not have been polluted severely.
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