Experimental studies of main electrotechnical parameters of insulation of electric locomotives traction motors at drying by different methods

According to statistics more than 30 % of faults of freight electric locomotives are because of traction motors. One of the weak points in traction motor is the insulation. Insulation damages cause up to 75 % of all faults. The paper presents a comparison of two methods of traction motors insulation drying - a convective method and a method that uses thermal infra-red radiation, describes the principle of conducting the experiments, shows the analysis of main electrotechnical parameters of insulation samples after drying.