室外照明配电接地类型20m距离规定的探讨

Discussion of 20 m Provision of Grounding Mode For Outdoor Lighting Distribution System

计算了建筑物内发生高、低压接地故障时对邻近建筑的室外人员、照明设备以及室外照明保护电器动作可靠性的影响。指出采用降低配电系统的接地电阻和室外照明灯具的保护接地电阻,以及选用合适的保护电器参数等措施,可以在邻近建筑物的室外照明配电系统中采用TT接地类型。

This paper calculated the influencing on outdoor people and hghting appliances, and the operating time of protective device for outdoor lighting appliance while the high and low voltage grounding faults occurred in building. It is pointed out that by u,＊ing of lower grounding resistance of distribution system, protecting grounding resistance of outdoor lighting appliance, and proper choice of protective device, TT system can be applied in outdoor lighting distribution system near buildings.