The Transmission Line Fault Detection System is developed to identify and indicate faults occurring in electrical transmission lines to ensure reliable and uninterrupted power supply. Transmission lines are prone to faults such as short circuits, line breaks, overcurrent, and overheating due to environmental conditions or system overload. Early detection of such faults is essential to prevent equipment damage and reduce power losses. This project continuously monitors the transmission line using temperature sensors and relay modules. When abnormal conditions such as excessive temperature or fault current are detected, the system activates a relay mechanism and provides a visual indication at the substation. The system operates using a 5V DC power supply and is designed for educational and demonstration purposes. It is cost-effective, easy to implement, and enhances system safety and reliability. The proposed system helps in quick fault identification and isolation, minimizing downtime and improving the overall efficiency of power transmission networks.

The Transmission Line Fault Detection System was successfully designed and implemented to monitor transmission lines for electrical faults and overheating conditions. The system continuously observes the condition of the transmission lines and detects abnormal situations such as overcurrent, short circuits, line-to-ground faults, and excessive temperature rise [3]. By using temperature sensors and a relay module, the system ensures fast and automatic detection of faults without requiring manual supervision. When an abnormal condition occurs, the sensing unit quickly identifies the fault and sends a signal to the relay module. The relay immediately isolates the faulty transmission line, preventing further damage to equipment and avoiding the spread of the fault to other healthy lines. The visual indication system at the substation clearly shows the faulty line by turning OFF the corresponding indicator bulb, making identification simple and quick for maintenance personnel. The project successfully achieves its main objectives, including rapid fault detection, automatic isolation, reduced power outage time, improved operational safety, and enhanced reliability of the power transmission system. The system is simple, cost-effective, and suitable for educational purposes as well as small-scale power monitoring applications. Overall, this project demonstrates an effective method of protecting transmission lines and ensuring continuous and safe power delivery.

[1]Gaurav Jichkar, Rahul Mohurle, Vikas Kalambhe “Electrical Fault Detection in Overhead Transmission Line”,International Journal of Advanced Research in Computer and Communication Engineering,Nagpur. Impact Factor 8.102 ISSN (O) 2278-1021, ISSN (P) 2319-5940 Vol. 13, March 2024 [2]Yogita Raut, Aditi Shinde, Purva Pokale “Smart Monitoring & Fault Detection System for Power Transmission Lines” International Research Journal of Engineering and Technology (IRJET),Pune. ISSN No.- 2395-0056, Apr 2025. [3]Subhomoy Chakraborty, Anupam Debnath “Transmission Line Faults Detection System With Temparature Protection”,Journal Of Emerging Technologies And Innovative Research (JETIR),ISSN No.-2349-5162,April 2023, Volume 10, Issue 4 [4]Yuvaraj Ganesha, Mohamed Hisham “3- Phase transmission line monitoring and fault detection system”,International Journal of Automobile Engineering,P-ISSN: 2707-8205 April 2023.