Radiofrequency Disturbances produced by Insulators Strings in wet Conditions

Checking the radio interference voltage (RIV) of high voltage equipment is one of the basic requirements for its acceptance in operation. The procedure for assessing the radiofrequency disturbance level of high-voltage equipment is well known and established by regulations elaborated by CISPR. Tests are performed in high-voltage shielded laboratories on equipment in dry conditions. The goal of the paper is the study of radiofrequency disturbances produced by insulators strings in different weather conditions including wet conditions (dew). The influence of moisture is obvious and must be taken in consideration when a complete characterization of equipment behavior is of interest.