A new project for motor fault detection and protection

This paper discusses a project that is used for detection and protection of the electrical and mechanical faults of motors. Through extracting the characteristics of sequence currents under all kinds of the electrical faults, the authors proposed a simple and comprehensive protective scheme in protection units. At the same time, by analyzing the spectrum of the stator currents with wavelet transforms, one can detect the mechanical faults of motors, such as broken rotor bars, etc