The problem of power line structure, a model of underground power line fault power line area using microcontroller is proposed. At the point where a similar obstacle occurs, as the current changes, depending on the duration of the power connection failure, the drop will be different. The resistor arrangement is used to address the power jumper and provide DC voltage. On the side of the power connector. When a fault occurs, the opposite terminal is identified by adjusting the voltage using a simple voltage converter. The microcontroller performs the necessary calculations. Therefore, the missing gap is displayed on the LCD screen. You can receive a warning message about registering a universal number