Three Mode Single Phase Automatic Changeover Controller

An automatic phase change over switch is designed primarily to disconnect load from its power source and transfer it to a standby source say generator or any other local power source like solar which is installed near our loads, in case there is a power outage. The switching process is done by one or more relay coils and this will prevent the power outages. Once the supply is restored, the load is transferred back to mains supply. The entire process is controlled by a group of relays that keeps sensing to detect that whether the main supply is available or not. This eliminates the need of manual operations and a small duration of power outage. The proposed Automatic changeover controller can switch three power sources alternately at a time.