摘要
以接地故障发生的高压侧作为切入点,对在道路照明设计中常用的TN-S、TT接地型式进行比较和说明。TT系统将电气设备的金属外壳直接接地,可以降低触电的危险性。详细介绍了TT接地系统在道路照明中的实施。实践证明,道路照明采用TT系统更具安全性。
With high voltage side of the ground fault occurs as the breakthrough point, the common TN-S and TT system used in the road lighting design were eompared and explained . Electrical equipment of the metal shell directly grounded in TT system, it could reduce the risk of electric shock. TT grounding system was introduced in the road lighting. The practice proved that the road lighting is more secure by using TT system.
出处
《现代建筑电气》
2014年第2期9-13,共5页
Modern Architecture Electric
