Service Conditions and Definitions for High-Voltage Fuses@ Distribution Enclosed Single-Pole Air Switches@ Fuse Disconnecting Switches@ and Accessories
This standard applies to high-voltage (above 1000 V) fuses and equipment. This includes distribution class and power class fuses@ distribution class enclosed single-pole air switches@ distribution class and power class fuse disconnecting switches@ and associated accessories that are intended for use on ac distribution systems. This standard applies to the following specific types of equipment:a) Distribution class and power class expulsion type fusesb) Distribution class and power class current-limiting fusesc) Distribution class and power class fuse disconnecting switchesd) Items a) through c) used in fuse enclosure packagese) Fuse supports@ fuseholders@ fuse units@ switch sticks and other parts and devices intended for use with distribution class and power class fuse disconnecting switchesf) Switch blades of the type used exclusively with distribution class and power class fuses and distribution class and power class fuse disconnecting switchesg) Fuse links when used exclusively with distribution class and power class fuses and distribution class and power class fuse disconnecting switchesh) Distribution class enclosed single-pole air switchesi) Distribution class and power class expulsion@ current-limiting@ and combination types of external capacitor fuses used with a capacitor unit@ groups of units@ or capacitor banks