Turnkey Substation General Hyosung provides 100% reliable and innovative solutions for Turnkey Substation. Starting out as a leading domestic manufacturer and contractor of high voltage electrical equipment and substation, Hyosung is now one of the largest manufacturer and provider of turnkey solution in the world. Our manufacturing knowledge sets us apart from other EPC contractors. We manufacture major substation equipment at our facilities in Changwon, Korea and at our global facilities. Hyosung has the ability to design, manufacture, and test individual components, as well as the proficiency to bring together and systemize the entire substation. We provide our service from the very beginning to the end. Our professional consulting and maintenance service is aimed to satisfy our customers. Our engineers are within your reach - wherever you may be - day and night. Our concept is straightforward. We strive to satisfy our customers. No matter the size and complexity, Hyosung will provide the turnkey solution to meet your needs.