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.
出处
《莱钢科技》
2010年第4期30-32,共3页
Laigang Science & Technology
关键词
变频切换工频
剩余电压
非同期并列
过流
changing over from frequency conversion to power frequency
residual voltage
asynchronous juxtaposition
overcurrent
