This seminar report discusses advance technology of power transformer protection. It was submitted by Ranjan Kumar, an undergraduate electrical engineering student at Arya Institute of Engineering & Technology, in partial fulfillment of the requirements for a Bachelor of Technology degree from Rajasthan Technical University. The report was guided by assistant professor Mr. Subhash Saini and overseen by seminar incharge Ms. Numa M. Thapliyal and head of the electrical engineering department Mr. Deepak Sharma.