SEPCO has the ability to complete transmission lines of 220kv and above with a total length of 2000km and substations with a total transforming capacity of 5000MVA per year. It is capable of manufacturing all kinds of towers and transmission lines with a total weight of over ten thousand tons. It is one of the earliest companies in China taking part in the construction of Ultra-High Voltage (UHV) Transmission and Substation Project. It has undertaken transmission and substation projects in Pakistan, Malaysia, and Nepal. Recently, it has successfully taken part in West-East power transmission project, three gorges hydropower station output transmission line project，and power grid interconnection project of China. The transmission and substation projects undertaken by it are all over China. It has completed substations with a total transforming capacity of over 45,000MVA and transmission lines with a total length of over 18000km.