The power system is divided into three sections: Generation, Distribution and Transmission. Various types of faults occurred in this system that should be isolated. In this module we included the Arduino UNO, to drive the relay, a resistor, LCD display, moving switches to create fault. as per the programming of Arduino UNO when we create the fault across any line LCD displayed the output as ,”Fault occurred in that particular line(i.e. R,Y,B) at the distance(1km,2km,3km,4km)”. The output which shows on the LCD display depends on where we create a fault and in which line. In this project, we represent a piece of the 11-kilovolt network in Tulkarm Governorate (Irtah Street), with an approximate length of 5 km.