Design and analysis of switching in automatic transfer switch for load transfer

The Automatic Transfer Switch (ATS) is used to transfer the load among several power sources to ensure continuous operation of load. ATS is required in developing countries where frequent power failure is an intense issue. Industries, public and private sector organizations and even domestic users cannot tolerate power outage because it pushes them in loss in business, interrupt in normal official work, hindrance in routine and domestic life. In this paper we have emphasized the use of good interface in terms of switching speeds and smooth transitions. This paper proposes a circuit whose output waveform shows smooth transitions without having any fluctuation at transients.