塑壳断路器的选择性保护分析

Analysis on Selective Protection of Moulded Case Circuit Breaker

介绍了塑壳断路器的选择性保护的定义、分类及实现方法。分别在过载、短路情况下,对塑壳断路器之间配合的选择性保护做了详细的分析说明。针对某型塑壳断路器,通过电流和时间选择,实现了部分选择性保护,并介绍了塑壳断路器实现全选择性保护的难点。

The definition,classification,realization method of selective protection of moulded case circuit breaker（MCCB） were introduced.The selective protection between MCCB on the condition of over-loading and short circuit was analyzed.Using the current selectivity and time selectivity,the selective protection of a type of MCCB had been achieved.The problems of completing selective protection between MCCB were analyzed.