High Voltage Current Limiting Fuses

Ferrule mounted R-rated Motor Starter Fuses

Features:
	Ferrule mounting for standard clips and interchangeability with other brands of fuses. 3 inch Diameter with clips centers of 7" for 2.75KV and 12" and 14" for 2.75/5.5KV and 8.25KV. Single, Double and Triple Barrel. For indoor use in or for use in a weatherproof enclosure. Indicating and non-indicating for use in Hazardous Locations. Optional Hookeye strap for use in Ampgard Motor Starters. Interrupting ratings of 65,000 amps for 2.75/5.5KV and 50,000 amps for 8.25KV fuses. Can be converted into Bolt-in style. See "Bolt-In Style "R" Rated Fuses.
Applications:
	Short circuit protection of medium voltage motors and motor controllers.
Definitions:
	R-Rating: An "R" rated fuse will melt in the range of 15 to 35 seconds at a value of current equal to 100 times the "R" number. Prior to the institution of "R" ratings, motor fuses were rated by current. The Attached chart gives the proper conversion to current standards. Back-up Current Limiting: A current limiting fuse which can interrupt any current in between its rated minimum interrupting current and its rated maximum interrupting current. Back-up fuses are not intended to be used as overload devices.