一种实用的三相异步电动机缺相保护电路  

The protection circuit of three-phase AC introduction motors

作　　者：智海素[1] 宋菲[1] 

机构地区：[1]石家庄职业技术学院电气与电子工程系,河北石家庄050081

出　　处：《石家庄职业技术学院学报》2008年第6期38-39,共2页Journal of Shijiazhuang College of Applied Technology

摘　　要：缺相是三相异步电动机负载运行时常见的故障之一,因缺相运行而造成的电动机烧毁事故在生产中占70%.传统的热继电器缺相保护存在反应慢、误动作或不能及时切断电路等问题.对传统的热继电器保护电路进行了改进,通过加接接触器,有效地实现了三相异步电动机的缺相保护.The phase break usually occurs to three-phase AC introduction motors at work. It accounts for 70 percent of the destruction of electromotor. The traditional relay features in slow response, wrong actions and failure to punctually shut the circuit. This article is aimed at the improvement of the heating relay, and realizing the protection of the three-phase AC introduction motors connecting AC contactors.

关 键 词：三相异步电动机 接触器 缺相保护 

分 类 号：TM30[电气工程—电机]