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,给出了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做了介绍。
The principle of circuit breaker's selection in low voltage power distribution system was introduced.Selection method of circuit breaker's 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 breaker's selection were analyzed.And cable's parameters were also introduced which might seriously affect circuit breaker's selection and system's normal operation.
出处
《低压电器》
2012年第5期53-58,共6页
Low Voltage Apparatus
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
selection of circuit breaker
rated current
short-circuit current
selective protection
cascade protection
low voltage power distribution system
