Electrical transducer can be used to measure the real-time parameters of power system accurately due to its characteristics of wide bandwidth

large dynamic range

and unsaturation in measuring high current.This paper proposes a short-circuit fault diagnosis system based on electronic transducer.This system can extract the signals’ details via wavelet transform for faults classification and pattern recognition with ANN

and can identify short-circuit fault in power system by means of expert system.On the platform of MATLAB and Visual C++

the system is simulated

and the results verify its effectiveness.