Xi'an High Voltage Switch Factory was founded in 1955. It is a large-scale enterprise which is based on one of the key projects of the First Five-Year Plan. It is the leader of the high voltage switch industry in China. In 2001, Shaanxi Changkai Electric Co., Ltd. was transformed into a large-scale power transmission and transformation equipment manufacturer; it was a subsidiary company of Xidian Group after the reformation of Xi'an High Voltage Switch Factory. It mainly developed and produced high voltage electrical equipment components, including 10KV-126KV high voltage circuit breaker, high voltage isolation switch, high voltage transformer, high voltage transformer, etc. Pressure arrester, high voltage fuse, etc.