Inspec keywords: poles and towers; insulator contamination; pollution; power transmission lines; composite insulators; insulator testing
Other keywords: standard suspended insulator strings; equivalent salt deposit density; NSSD; transmission line; ESDD; insulation selection; natural contamination accumulation characteristics; pollution characteristics difference; pollution sources; standard disc-type suspended insulator; standard form suspended insulators trend; PM10 concentration; nonsoluble deposit density; Zhejiang province; composite rod insulators