The long distance and large span of the power system transmission lines lead to its high risk of lightning stroke.Moreover it is difficult to fix the lightning fault point

which brings very great difficulty for equipment repair timely.In order to solve this problem

the paper presents the design of a remote location device for transmission line lightning fault point.The device is based on GSM wireless communication network and uses low power consumption MCU MSP430 as the control unit

adopting the current collection ring and Rogowski current sensor to monitor the insulator string on the transmission lines.If the lightning flashover accidents happened on the monitored insulator string

this device will transmit the information of lighting fault point to the monitoring center and mobile phones of related staff through GSM wireless network in the form of mobile phone short message

thus replacing the human inspection tour.This device can correctly and effectively locate the lightning fault point

which will win precious time for the emergent repairing of transmission lines

as well as save manpower and material resources.In addition

it can reduce the economic loss and ensure the reliability of power supply.