AUTOMATIC CHANGEOVER WITH THREE-PHASE SUPPLY IN EDUCATIONAL INSTITUTION

The process plants run 24/7 a year. Any disruption in the power supply can cause the process tohalt, resulting in significant productivity loss and financial consequences. If the TANGEDCOmain supply fails, the standby power should kick in without much delay. An Automatic MainsFailure (AMF) arrangement is necessary to satisfy this requirement, which automatically switchesfrom utility to DG power in the event of utility power failure. An AMF arrangement wasfabricated, wired up, interfaced with a laboratory three-phase alternator, and tested for varioussequences as part of this project work. Interlocks and multiple operation sequences were alsoinvestigated in a real-time AMF circuit. The attached load information on the college campus wasgathered, and the cable sizing was examined from the standpoint of generator activity. Thegenerator was appropriately sized based on the load data obtained, the neutral arrangement was allchecked, and proper sizing was arrived at to ensure stable operation of the Diesel Generator instandby mode of operation. The current continuous set mode of operation for DG sets withTANGEDCO supply is contrasted to the continuing HT conversion mode. Based on a comparativestudy, the economics of diesel consumption/TANGEDCO tariff is calculated. The proposed DGset's positioning has also been optimized for greater service stability to feed the campus loadswithout disruption and to ensure effective operation. The proposed DG set's location has also beenoptimized for greater versatility in service, to feed the campus loads without disruption and toensure the DG set's efficient operation. The entire function of the DG set is examined, taking intoaccount all factors such as AMF, economics, operational stability, and so on.