快速自动开关 meaning in English

quick acting automatic switch

According to recording data of higher level monitor and control system when main motor drive system for four - high medium plate mill is operated , and relation between armature voltage of dc electromotor and ac input voltage of inverter , trip cause of dc fast automatic switch was analyzed in detail , and specific countermeasure and measures are given
根据中板四辊轧机主电机传动系统运行时的上级监控系统记录数据，以及直流电机电枢电压与变流器交流侧输人电压的关系，详尽地分析了直流快速自动开关跳闸故障原因，并提出具体的对策及措施。