JIMMA UNIVERSITY JIMMA INSTITUTE OF TECHNOLOGY FACULTY OF ELECTRICAL AND COMPUTER ENGINEERING POWER STREAM GSM BASED LOW VOLTAGE TRANSMITION LINE FAULT DETECTION GROUP MEMBERS NAME ID.NO 1. BAYECHA KETEMA RU 1596/09 2. YENESEW ALEMU RU 4955/09 3. ABENEZER ZERIHUN RU 1496/09 4.DIRIBA ABEBE RU 3109/09 5. ZARA MUSTEFA RU 1859/09 Abstract The main aim of this project is to develop SMS based transmission line fault location that can increase the reliability of electric power to customers by minimizing the maintenance time of the power outages due to transmission line faults using an accurate fault location method for low voltage overhead transmission lines depending on the available information at the locator location. Transmission Line fault is the most common fault; they may be triggered by lightning strokes, fall of trees across the lines, and other mechanical means. These faults must be addressed as soon as they occurred to assure continuity of electric power supply. Thus, it is necessary to detect the fault as early as possible. This project presents a fault detection and location technique for low voltage overhead transmission line using one end impedance based fault detection and location on GSM based. The GSM (Global system of mobile communication) based transmission line fault detection is designed to detect the low voltage transmission line fault for the EEP workers to easily recognize the current condition of the transmission line through SMS texting. The proposed system helps to detect the low voltage transmission line faults continuously and hence to guard the fault of transmission line due to the constraints such as unsymmetrical and symmetrical types of faults mainly short circuit faults. If any of this does occur, then the EEP workers can easily detect the fault and maintenance will be done within a short period of time. Therefore, the proposed system will provide the solution for the problem complain of the society (customers) due to outage of power within a short period of time.