Abstract
Power transformers are key components for electrical energy transfer in a Power system. In order to protect the transformers from these faults different protective methods are adopted. Some of them are differential protection, over excitation Protection, etc. In this Paper Over Voltage protection is established for the protection of the transformer. Microcontroller is used for the Power Transformer Protection as a relay. It will sense the fault Due to over voltage of about +5% and send trip signal to the relay driver circuit and the power transformer will automatically get isolated from the system. The Simulation circuit is designed in Proteus Software and analyzed successfully. The Programming is also done accordingly.
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