近年来,我国经济发展保持快速增长趋势,城市化进程开始加速,城市规模越来越大。随着经济的增长,城市居民生活水平的提高,以及国家产业政策的扶持,机动车进入家庭已经日益普遍,机动化的趋势也越来越明显。城市化和城市机动化的联动发展,对城市交通已经造成了巨大压力。金属封闭直流开关柜作为城市轨道交通供电安全的保证,其作用不言而喻。 In recent years, China’s economy maintained a rapid growth trend, the process of urbanization began to accelerate and the size of the city was getting larger and larger. With economic growth, the improvement of living standards of urban residents, and the support of national industrial policies, the entry of motor vehicles into homes has become increasingly common and the trend toward motorization has become increasingly evident. The coordinated development of urbanization and urban mobility has caused great pressure on urban transport. Metal-enclosed DC switchgear as urban rail transit power supply security assurance, its role is self-evident.