P.Ram Kishore Kumar Reddy,

Choice of rating, setting, and co-ordination of protective devices is very vital for improving the power quality in power systems. This necessitates detection and classification of the faults quickly and accurately. In this paper Wavelet Transforms have been used to obtain the detailed and approximate coefficients of the fault signal. An algorithm is developed based on the histogram representation of these detailed and approximate coefficients to classify the faults. The effectiveness of this new method is compared with that of the fuzzy logic