电动机保护用低压断路器及其选择  

LOW-VOLTAGE CIRCUIT BREAKER FOR MOTOR PROTECTION AND ITS SELECTION

作　　者：王译伟 Wang Yiwei(SINOPEC Engineering Incorporation,Beijing,100101)

机构地区：[1]中国石化工程建设有限公司,北京100101

出　　处：《石油化工设计》2022年第1期40-43,I0003,共5页Petrochemical Design

摘　　要：低压断路器是低压配电系统中的重要保护电器,简要对比了不同类别低压断路器的区别,重点分析了电动机保护用MCCB的参数和特性,及其过电流脱扣器与配电保护用过电流脱扣器的区别。归纳了电动机保护用低压断路器及其过电流脱扣器的选择和整定方法,并以实例说明其选用的具体步骤。Low-voltage circuit breaker is significant in low-voltage distribution system.Various low-voltage circuit breakers are briefly compared in this paper.The parameters and characteristics of MCCB for motor protection and the differences between its over-current release and the over-current release for distribution protection are analyzed.The selection and setting methods for low-voltage circuit breaker for motor protection and its over-current release are summarized,and the steps of selection are discussed with examples.

关 键 词：低压断路器 电动机保护 过电流脱扣器 

分 类 号：TM5[电气工程—电器]