Changgao Electric Group Co., Ltd. researches, develops, manufactures, and sells power transmission equipment in the People's Republic of China. Its products include gas-insulated metal-enclosed switchgear, outdoor pole-type vacuum and outdoor high-voltage AC circuit breakers, disconnectors, and low/medium-voltage switchgear such as series relays, cable-type data collection units, cable fault indicators, overhead-type data collection units, intelligent shield movable AC metal-enclosed switchgear, overhead-type fault indicators, low-voltage withdrawable switchgear, fully insulated and enclosed compact switchgear, and combined substations. The company also provides engineering services including operation and maintenance, construction, design, financial support, and consulting, as well as equipment supply. Formerly known as Hunan Changgao Highvoltage Switchgear Group Co., Ltd., it changed its name to Changgao Electric Group Co., Ltd., was founded in 1998, and is headquartered in Changsha, the People's Republic of China.