给水泵过流跳闸事故分析  

An Analysis of A Water Supply Pump Overcurrent Trip Accident

作　　者：李增光[1] 李传纪[1] 王新娣[1] 关彦华[1] 徐国强 

机构地区：[1]莱芜钢铁集团有限公司热电厂

出　　处：《莱钢科技》2010年第4期30-32,共3页Laigang Science & Technology

摘　　要：主要针对给水泵电机在负荷突变，变频器自动由变频运行切换到工频运行时，上级断路器过流跳闸的问题进行原因分析，并根据分析的原因进行了改造，提高了给水泵电机的运行可靠性。Aimed at the causes of overcurrent trips in high-level current breakers of the water supply pump electric motors when their loads changed suddenly and their frequency transformers were automatically changing over from frequency-conversion to power frequency, an analysis was carried out, based on which a transformation was made, improving the reliability in the moving of the water supply pump electric motors.

关 键 词：变频切换工频 剩余电压 非同期并列 过流 

分 类 号：TM726[电气工程—电力系统及自动化]