有关断路器型号中In Ir Inm的说明有关断路器型号中In Ir Inm的说明2010-12-27 22:38一、In是过负荷脱扣器的额定电流,Ir是长延时过负荷脱扣器整定电流,Isd是短延时过负荷脱扣器的整定电流。Im是瞬时(热磁)脱扣器整定电流。国标《低压开关设备和控制设备低压断路器》GBl 4048.2-94(等效采用IEC947-2)对断路器的额定电流的概念有如下解释:断路器的额定电流1
专业英语八级(听力)模拟试卷26 (题后含答案及解析)题型有:1. LISTENING COMPREHENSION 电源短路 PART I LISTENING COMPREHENSION (35 MIN)SECTION A MINI-LECTUREDirections: In this ction you sill hear a mini-l
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