低压配电系统电气设计中的断路器选型(下)  

Circuit Breaker's Selection in Electrical Design of Low Voltage Power Distribution System

作　　者：卜浩民 

机构地区：[1]上海良信电器股份有限公司,上海200137

出　　处：《低压电器》2012年第6期51-56,共6页Low Voltage Apparatus

摘　　要：介绍了低压配电系统中断路器的选型原则。从回路负载电流和短路电流的计算出发,给出断路器额定电流和分断能力的选择方法。对断路器选型中实现选择性保护的类型、条件和实现途径进行了分析,并对影响断路器选型及系统正常运行不可忽视的电缆参数选择作了介绍。The principle of circuit breakers＇ selection in low voltage power distribution system was introduced. Selection method of circuit breakers＇ rated current and breaking capacity was also given by calculating load current and short-circuit current. The type of selective protection,conditions and implementation methods in circuit breakers＇ selection were analyzed. And cable＇s parameters were also introduced which might seriously affect circuit breakers＇ selection and system＇ s normal operation.

关 键 词：断路器选型 额定电流 短路电流 选择性保护 级联保护 低压配电系统 

分 类 号：TM561[电气工程—电器]