Transformer Guardian 360: An IoT-Based Multi Parameter Condition Monitoring System for Distribution Transformers

This research presents an IoT-based multi-parameter transformer condition monitoring system that integrates voltage, current, oil temperature, oil level, humidity, and vibration sensing using an ESP32 microcontroller. A Transformer Health Index (HI) is developed by combining multiple operating parameters to provide an overall condition assessment and early fault warning. The system enables real-time monitoring through Blynk IoT, helping improve transformer reliability and support predictive maintenance.