Paper Details

Power failure is a common problem. It hampers the production of industry, construction work of new plants and building.It can be overcome by using a backup power supply such as a generator. But it is cost effective and also time consuming as a certaintime is required to switch on the generator manually. It is often noticed that power interruption in distribution system is about 70percent for single phase faults while other two phases are in normal condition. Thus, in any commercial or domestic power supplysystem where three phases is available, an automatic phase selector system is required for uninterrupted power to critical loads in theevent of power failure in any phase. This project presents a system which is a power based auto select technology which automaticallyselects an alternating current (A.C) phase out of three phases instead of the usual manual changing of cut out fuses which is tediousand prone to human error. The purpose of this project is to use the system of automation to carry out the selection of an Alternatingcurrent (A.C) power phases using a combination of power, microcontroller and relay (switch) circuit thereby eliminating every form ofhuman involvement in the process. This project also includes a current sensing circuit which is fed back to the microcontroller forbalancing of the three phases. The goal of A.C phase automatic selection was achieved using fewer components, lesser consumption ofenergy as well and at a lesser cost compared to the usual, conventional way (manual switching) of phase selection.

Sreejith S, Ajose Thomas, Jestin P Johnson, “AUTO SELECTION OF ANY AVAILABLE PHASE, IN 3 PHASE SUPPLY SYSTEM”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 10, pp. 112-120, October 2018.