摘要
通信用-48V直流配电设备保护地线的选择在各种规范中一直不明确。文章结合直流配电系统结构分析了直流配电设备保护地线设置的目的和原因,针对熔断器保护的直流配电设备,根据熔断器的时间电流特性,采用对电缆热稳定校验的方法给出了保护地线的最小参考截面。
It is not clearly in all standards of selection for protective earth wire in-48V DC power distribution equipment for communication. In this paper, combined with DC power distribution system, the reason why DC power distribution equipment needs to set protective earth wire is analyzed. And also, the cross-sectional area of protective earth wire is given for fuse protected DC power equipment based on the time-current characteristics of fuse.
出处
《电信工程技术与标准化》
2014年第3期36-39,共4页
Telecom Engineering Technics and Standardization
关键词
-48V直流配电
保护地线
熔断器
-48V DC power distribution
protective earth wire
fuse
