With the rapid development of social economy, all walks of life have put forward higher requirements for the quality and quantity of power supply, and the safety of line operation has become an important indicator of power grid reliability. At present, the main factor threatening the safe and stable operation of the line has changed from the original equipment factor to external force damage, such as the suspension of foreign objects, municipal engineering, large-scale machinery hitting the line, etc. The transmission line often lacks real-time warnings and leads to the occurrence of transmission line accidents. Special R&D and design of transmission line warning devices to warn of such incidents. Transmission line warning device series products: ◇Intelligent warning ball against external breakage of transmission line (explosive flash function) BRTZN-AI001-280; ◇ Intelligent warning ball for preventing external breakage of transmission line (with sound and light alarm function) BRTZN-AI002-280; ◇ Intelligent warning ball for preventing external breakage of transmission lines (acousto-optic alarm, SMS notification function) BRTZN-AI003-280; ◇ Intelligent warning ball for preventing external breakage of power transmission line (video, photo, motion detection function) BRTZN-AI004-280