摘要
介绍了城市轨道交通车辆保护接地的概念和设备保护接地的原则,对比分析了不同的车体保护接地方案的优缺点。直接接地方案与接地电阻方案相比,前者使流经车体的电流的比例要大。增设接地电阻对减少流经车体的回流电流有明显的改善作用。
The concept and working principle of URT vehicle grounding and equipment protective earthing are introduced, the advantages and disadvantages of different schemes are compared. Since the direct grounding scheme has larger current flowing through the car body than the resistance scheme, the increase of the grounding resistance will obviously decrease the return current through car body.
出处
《城市轨道交通研究》
北大核心
2012年第8期139-140,144,共3页
Urban Mass Transit
关键词
城市轨道交通
车辆
保护接地
urban rail transit
vehicle
protective earthing
