21. AUTOMATIC LOAD SHARING OF TRANSFORMER USING MICROCONTROLER

The aim of the paper is automatic load sharing of transformer under overload condition and protect the transformer from damage and give uninterrupted power supply. Due to overloading the surpasses current flow, the windings become overheated and may burn, resulting in a decrease in efficiency. Protect the transformer by attaching a second transformer with the same rating in parallel and sharing loads using a microcontroller.The first transformer's load is compared to a reference value by the microcontroller. The second transformer will share the additional load if the load exceeds the reference value. As a result, the two transformers operate effectively and are protected from harm. The load currents in this project are controlled by three modu les.The first module serves as a sensing unit to measure the load's current, while the second module serves as a control unit. The microcontroller is the final module. unit and it will read the analogue signal from the sensor module and perform some calculation and finally gives control signal to a relay. The advantages of the project is protection of transformer, uninterrupted power supply, short circuit protection, and for maintenance purpose.