科技情报开发与经济 SCI- TECH INFORMATION DEVELOPMENT &ECONOMY 20 10 年 第 20 卷 第 27 期 Discussion on the Selection of Low- voltage Circuit Breaker Used for the Protection of Electromotor FENG Zhuan-ling ABSTRACT : This paper introduces the types of low- voltagecircuit breaker and the meanings of common parameters, expoundssome basic principles of the selection of low - voltagecircuit breaker used for the prot