High levels of radio interference often indicate excessive corona discharge. Over time, these discharges can degrade the surface of the insulator, leading to tracking, erosion, and eventual mechanical or electrical failure.
Insulators are designed to withstand high voltage, but under normal operation, small corona discharges can occur. These discharges produce radio frequency noise that: iec 60437 pdf
Insulator strings and sets used in substations and overhead lines. High levels of radio interference often indicate excessive