In accordance with the guidance of "Transportation and Supply Equipment Letter No. 325" and "Transportation and Supply Equipment Letter No. 240" issued by the Transportation Bureau of China Railway Corporation, GB 50057 "Design code for protection of Structures against lightning" and GB 50343 "Technical code for protection of building electronic information system against ligtning", Anhui Jinli Electric Tech. Co., Ltd has fully combined the two basic principles of lightning protection zoning and lightning protection classification, and launched the "distributed" lightning protection system and the "centralized" lightning protection system. It can effectively suppress strong lightning from invading the secondary system of the traction substation and prevent the secondary system equipment of the traction substation from being damaged by strong lightning intrusion.  The products including surge protection devices, isolation transformer cabinet, comprehensive intelligent lightning protection screen of Anhui Jinli Electric Tech. Co., Ltd. can meet the relevant technical requirements and standards and provide effective lightning protection measures.