Detection of winding faults in electrical machines using the frequency response analysis method

The frequency response analysis method is more and more frequently used as a diagnostic tool for investigation of electrical device windings. The method is being used for identification of dislocations and deformations of transformer windings. This paper presents a novel application regarding possibilities of the frequency response analysis method in electrical machine windings. Of special importance is the early detection of winding failures in electrical machines, both during the manufacturing process and in operation. The results of investigations of winding faults in electrical machines of different construction are presented in this paper. The influence of turn-to-turn faults between adjacent winding wires on the admittance waveform was investigated.