中压电缆的热稳定校验  

Thermal Stability Verification of Medium‑voltage Cables

作　　者：焦建雷 JIAO Jianlei(Beijing Scientech International Project Management Co.,Ltd.,Beijing 100048,China)

机构地区：[1]北京兴电国际工程管理有限公司,北京市100048

出　　处：《建筑电气》2021年第2期56-58,共3页Building Electricity

摘　　要：根据电网区域变电站10~20 kV母线的短路电流、电缆规格及长度,用GB/T 15544/IEC 6090系列标准《三相交流系统短路电流计算》计算中压电缆短路电流,根据继电保护动作时间来校验短路热稳定;并对国标图集19DX101-1《建筑电气常用数据》中中压电缆短路热稳定校验表格的应用进行验证和说明。According to the short‑circuit current,cable specification and length of the 10~20 kV busbar of the substation in the grid area,the short‑circuit current of medium‑voltage cables are calculated by the Short‑circuit Current Calculation in Three‑Phase a.c.Systems(GB/T 15544/IEC 6090),and short‑circuit thermal stability is verified based on the time of relay protection action;the application of short circuit thermal stability verification form of medium‑voltage cables in the national standard atlas 19DX101-1 Common Data of Building Electricity are validated and illustrated.

关 键 词：短路电流 GB/T 15544(IEC法) 中压电缆 电缆规格 动作时间 热稳定校验 计算公式 国标图集 

分 类 号：TU852[建筑科学]