钱中阳(中国市政工程西北设计研究院有限公司,兰州市 730000)
杨金宝(兰州市城市建设设计院,兰州市 730050)
焦建雷(北京兴电国际工程管理有限公司,北京市 100048)
小截面控制电缆的配电距离校验(钱中阳 杨金宝 焦建雷)
Check of Power Distribution Range of Small-section Control Cable
QIAN Zhongyang(CSCEC AECOM Consultants Co.,Ltd.,Lanzhou 730000,China)
YANG Jinbao(Lanzhou Urban Construction Design Institute,Lanzhou 730050,China)
JIAO Jianlei(Beijing Scientech International Project Management Co.,Ltd.,Beijing 100048,China)
Abstract:The paper,from the point of view of the protection requirements of single‑phase earth fault current,studies the maximum distribution distance for different fuse capacity selection and different control cable core section selection in the secondary circuit,
and discusses the selection of fuse,the comparison of fuse and circuit breaker protection,etc.
Key words:earth fault;protection sensitivity;voltage drop;power distribution distance;control cable;cross‑section of cable;fuse;backup protection
摘 要:从单相接地故障电流的保护技术要求角度出发,针对二次回路中不同熔断器容量选型和不同控制电缆线芯截面选型,研究其最大配电距离,并对熔断器选型、熔断器与断路器保护比较等问题进行探讨。
关键词:接地故障;保护灵敏度;电压降;配电距离;控制电缆;电缆截面;熔断器;后备保护
中图分类号:TU852 文献标识码:A
doi:10.3969 / j. issn.1003 - 8493.2021.01.007