Our R-Rated, current-limiting medium voltage fuses are backup fuses suitable for indoor and outdoor use in applications where it is necessary to limit short-circuit currents on high capacity systems. They are typically used to protect medium voltage drives and starters.Construction types include ferrule and bolt-on, with special application ferrule and hermetically sealed fuses available for use with motor starters and motor controls, including AMPGARD motor starters. Both fuse mountings and fuse clips are available.All of our R-Rated medium voltage fuses include open fuse indication to speed troubleshooting.