The paper present review on various transformer protection technologies and monitoring and controlling of transformer. The paper describes the technologies by which we can protect the transformer. This includes transformer protection using PLC system, GSM module, relay, fuzzy logic, arduino etc. This paper also includes the monitoring and controlling of transformer with the help of PLC system and single board computer. It also shows the effect of inrush current on transformer protection. Transformers are the most important equipments for electrical energy transfer in power system. Stability and security of transformer protection are important to system operation. Hence, this paper includes various technologies for the transformer protection. Anand Sharma | Dr. Deepika Chauhan | Vijay Kumar Mahawar "A Review on Various Methods of Transformer Protection" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-3 , April 2018, URL: https://www.ijtsrd.com/papers/ijtsrd11267.pdf