TN系统配电线路保护距离简析  

Analysis of the Protection Distance of TN System Distribution Line

作　　者：王一平[1] 高飞[1] WANG Yiping GAO Fei(Architectural Design ＆ Research Institute of South China University of Technology, Guangzhou 510641, China)

机构地区：[1]华南理工大学建筑设计研究院,广州市510641

出　　处：《建筑电气》2017年第8期19-24,共6页Building Electricity

摘　　要：民用建筑T N系统中,通常采用断路器作为配电线路过负荷及短路保护电器,同时兼作间接接触防护电器,通过分析兼作间接接触防护断路器的动作特性及配电线路故障时切断故障回路的时间要求,大致计算出配电线路的保护距离范围,为工程设计提供一定的参考。In the TN system of civil buildings, a circuit breaker is usually used for over-load and short-circuit protection of distribution lines. At the same time, it also serves as an protection against indirect contact device. By analyzing the operating characteristics of the circuit breaker as an protection against indirect contact device and the time required to cut off the fault circuit when the distribution line fails, the protection distance range of the distribution lines is roughly calculated to provide a reference for engineering design.

关 键 词：TN系统 配电线路 接地故障回路阻抗 间接接触防护 断路器脱扣曲线 电缆选型 故障切断时间 等电位联结 

分 类 号：TU852[建筑科学]