我国第一套接触网相分段自动转换装置──咸阳西自动换相所投入运行由郑州铁路局西安科研所承担的铁道部科研计划项目“相分段自动转换装置”，经过十多年的潜心研究，第一代样机１９８１—１９８２年在宝成．＄福！ｋ堡运行试验Ｔ７个月，在此基础上再次进行研究改进，１... China’s first set of catenary phase automatic conversion device ─ ─ Xianyang West automatic commutation put into operation by the Zhengzhou Railway Bureau, Xi’an Research Institute of the Ministry of Railways under the auspices of the scientific research project “phase-by-stage automatic conversion device”, after more than a decade With great concentration, the first generation of prototype 1981 - 1982 in Baocheng. $ Bless! K fort operation test T7 months, on the basis of further research and improvement, 1 ...