Discussion on the Optimization of Design Details of Metro Low-voltage Distribution System

Zhang Zhenyu（Beijing Urban Engineering Design & Research Institute Co.，Ltd.，Beijing 100037，China）

Abstract The optimization of design details of metro low-voltage distribution is discussed，which includes ： summer air conditioning （ refrigeration ）equipments and winter heating equipments share common distribution circuit to the greatest extent; for the section normal lighting at both ends of the station platform，it is unnecessary to set dual power switch box at both ends of the station platform; and the optimizations of station public area illumination.

Key words　Metro Load calculation Cable selection Dual-power switch box Fault point Selectivity cooperation

摘　要　对地铁低压配电中的设计细节优化进行了探讨，包括：夏季空调（制冷）设备与冬季采暖设备尽量共用配电回路；一般车站站台两端的区间正常照明无需在车站站台两端分别设置双电源切换箱；车站公共区照明的优化设计。

关键词　地铁　负荷计算　电缆选型　双电源切换箱　故障点　选择性配合