Guide for the Application@ Operation@ and Maintenance of High-Voltage Fuses@ Distribution Enclosed Single-Pole Air Switches@ Fuse Disconnecting Switches@ and Accessories
This guide presents information on the application@ operation@ and maintenance of high-voltage fuses (above 1000 V)@ distribution enclosed single-pole air switches@ fuse disconnecting switches@ and accessories for use on ac distribution systems. Devices with rated maximum voltages to 169 kV are covered. These guidelines apply to the following specific types of equipment:a) Distribution and power class expulsion-type fuses.b) Distribution and power class current-limiting type fuses.c) Distribution and power class fuse disconnecting switches.d) Items a) through c) used in fuse-enclosure packages (see types listed in 1.3 and 1.4).e) Fuse supports@ and fuse mountings@ of the type intended for use with distribution and power class fuses@ and fuse disconnecting switches.f) Removable switch blades of the type used exclusively with distribution class oil cutouts@ power class fuses@ and distribution class fuse disconnecting switches.g) Fuse links of the type used exclusively with distribution class oil cutouts@ power class fuses@ and distribution class fuse disconnecting switches.h) Distribution class oil cutouts.i) Distribution class enclosed single-pole air switches.j) Distribution and power classes of expulsion@ current-limiting and combination external capacitor fuses used with a capacitor unit@ groups of units@ or capacitor banks.