HR17 fuse switch disconnector,Isolating Switch Fuse Rated voltage: 660V Rated current:160A,250A,400A,630A HR17 fuse switch disconnector,Isolating Switch Fuse1. Description:DNH1(HR17) series ... . the rates current 160A~630A mainly used as power switch, isolating switch and emergency switch with function of protection in the circuit with high ...