... rated operating voltage 690V 400V rated frequency 5HZ rated current 160A-630A 1 Use HR17 series fuse type isolating switch, ... operating voltage 690V,400V rated frequency 50Hz, the rated current 160A-630A,mainly used as power switch,isolating switch and emergency ... 690V AC 400V2.3 Rated heating current160A, 250A, 400A , 630A2.4 Rated operating current400V:160A ,250A, 400A, 630A, 690V:100A, 200A, 315A, ...