B.K.E. Generator Changeover Switch automatically transfers load from mains to generator and from generator to mains. The selection of changeover is done according to the mains load. It is available from 32 amps to 63 amps in Single Phase and 32 amps to 500 amps in three phase variants. The size of change over varies depending upon the capacity of the load. All the three phase changeover switches are equipped with timer system which provides 12 sec delay on Generator mode and instant transfer during mains that prevents sparking and instant heavy load on Generator during start up. The change overs equipped with P.C Circuit operates even if any of the one or two phases are missing at input supply.