Guodian Nanjing Automation Co., Ltd. provides industrial power automation equipment in China and internationally. Its offerings include safety and stability control, power plant electrical systems, and high, medium, and low voltage relay protection products, as well as automation and communication products such as substation and distribution network automation, system auxiliary equipment, and power supply. The company also supplies primary equipment products including online monitoring, mutual inductors, transformers, and switchgear; track monitoring systems and traction substations for rail transit automation; energy information technology and information security products; hydropower and water conservancy automation; and frequency conversion for energy saving and environmental protection. Additionally, it offers prefabricated substations, reactive power compensation, and inverter new energy products, along with smart grid and power plant, energy information technology, rail transit and building automation, and engineering general contracting solutions. Founded in 1940 and headquartered in Nanjing, China, it operates as a subsidiary of Huadian Corporation Nanjing Electric Power Automation Equipment Co., Ltd.