Three-Phase Automatic/ Manual Generator Controller Module is designed with an advanced single chip microcomputer for easy and trouble free DG set control in case of mains power failures. The Controller Module initiates an automatic DG set "start cycle" including load transfer to the generator by switching on the generator contactors. The Controller Module ensures that after the main power is restored, the load would get automatically transferred back to mains and the DG set would stop after "cool down" time. Three-Phase Automatic/ Manual Generator Controller Module is strong and rigid in construction and requires minimal use and maintenance.