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An Experimental Study for Inter-Tum and Bearing Fault Detection of Electrical Machines Using Sensors and Logic Based Display System

This paper presents an experimental study for detection of inter-turn and bearing faults in electrical machines using a sensor and logic circuitry based display mechanism. In a number of techniques proposed earlier, sensors based measurement of voltage, current, temperature, and speed were achieved and transferred to computer for protection decision. But, those suggested techniques were engraved with the limitations that they were machine dependent and less efficient in case of multiplicity of faults apart from their high cost and requirement of expert knowledge. The cost effective logic mechanism developed in this work gives the flexibility to monitor multiple faults at incipient stage and take protection decisions. The programmability of the developed system with respect to threshold values of the parameters; makes it independent of machines and machines' ratings. The literature is void of such a system satiating the twin objectives of condition monitoring - fault detection and protection, in the most simple and user friendly manner.