... Switch, Fuse Switches, Fuse Base, Fuse Holder, Switch Disconnector.HR17 series Fuse switch-disconnectors, rated insulating voltage AC690V, rated operating voltage ... the electric circuit to overload with short-circuits the protection function, only satisfies the rating which this switch stipulated to put ... breaks the ability, makes the line to isolate uses. HR17 Series Fuse Switch Disconnector