YCHR17 series fuse switch-disconnector is a new product, it's rated insulation voltge ... 160 315 315 Operating force ≤250 ≤350 ≤350 ≤450 Matched fuse Size NT00 NT1 NT2 NT3 Rated current of matched ... fuse in 400V (breaking capacity ) 20,25,32,35,40,50, ... ,355,400,425,500,630(≥100kA) Rated current of matched fuse in 690V (breaking capacity ) 20,25,32,35,40,50 ...