Automatic Phase Sequence Corrector with Prevention of Single Phasing

This paper presents the difficulties of phase reversal and single phasing and proposed a design which is a remedy of these problems at very low cost. Phase reversal and single phasing are very frequent problem in our country. A 3-phase motor does not start if any one phase fails. However if a phase fails during the running condition, it will be overloaded, which may damage the motor winding. If phase reversal occurs then the motor will rotate in the reverse direction of the original direction. If a generator is connected with the motor shaft ,then the generator brush or slip ring will be damaged. For many other industrial applications we need to rotate motors in a definite direction only. In this project, a very simple automatic phase sequence corrector with single phasing preventer is designed.