Predetermination of the Radio Noise Level Under Rain of an Extra-High-Voltage Line

Radio noise levels under rain of 4-conductor bundles installed at les Renardières experimental station have remained remarkably constant during the first two years of operation. These levels are reached as soon as the rain intensity exceeds 0.01 mm /min. It is therefore possible to predetermine accurately the radio noise level under rain of a line equipped with 4-conductor bundles depending on the surface gradient and the radius of the subconductors.