HR17 Series Fuse Type Isolating Switch Rated voltage :690,500,400V Using category:100~630A Naidian Brand HR17 Series Fuse Type Isolating SwitchHR17 series fuse type isolating switch, rated insulating ... operate the single motor.When isolator with isolating knife replace fuse, this switch does not have the electric to overload ... GB14048.3-2002, IEC947-3(1999), 3C HR17 Series Fuse Type Isolating Switch