SEC Zhangjiagang Transformers Co., Ltd. is a holding subsidiary of Shanghai Electric Power Transmission and Distribution Group. Which are jointly established by Shanghai Nanqiao Transformer Co., Ltd., (Wholly-owned subsidiary of Shanghai Electric Power Transmission and Distribution Group) and Jiangsu Wuzhou Power Technology Co., Ltd. It is a comprehensive energy company and integrating in products, engineering and services.

The company located in National Zhangjiagang Economic and Technological Development Zone, next to the largest inland river international trade port along the Yangtze River (except Shanghai port) - Zhangjiagang port (the only national bonded port in Jiangsu Province), with developed economy and convenient transportation. The company covers an area of 200,000 square meters, a building area of 125,000 square meters, has more than 500 employees, and the proportion of engineering and technical personnel is more than 30%. It has more than 600 professional and domestic leading level transformer production equipment. Its main equipment includes German Georg transverse thread cutting machine 1000*5000mm, 40 ton vertical winding machine, 25 ton horizontal winding machine, Automatic CNC insulation processing center, 500kW coal oil gas phase drying equipment ,300 ton air cushion car, Full vacuum oiling equipment ,200 ton iron core turning table, 2400 ton hot press, etc, and the annual production capacity up to 100 million KVA. It has a large and fully enclosed dust-proof transformer plant of 95,000 square meters, and with a maximum lifting capacity of 600 tons. It covers an area of 3,000 square meters 500kV ultra-high voltage test center and 1,000 square meters 110kV transformer test center, which can ensure that the product quality, performance, test and detection technology can reach the domestic and international advanced level.