In present paper the short-circuit fault inter-turn on the stator of an induction motor is analyzed by two online diagnosis methods. The analysis trends to extend the application of the recently proposed diagnosis technique of multiple reference frames. An eccentricity indicator is proposed to improve the application of the Park's Vector Approach and a comparison between fault indicators obtained by each one of the techniques is done. A tri-phase 3hp squirrel cage induction motor especially modified to establish different fault levels is used for validation purposes.