IEEE C37.40-1981

This standard applies to high-voltage fuses (above 600 V), distribution enclosed single-pole air switches, fuse disconnecting switches, and accessories for ac distribution systems, as follows: (1) Enclosed, open, and open-link types of distribution cutouts and fuses (2) Distribution current limiting fuses (3) Distribution oil cutouts (4) Distribution enclosed single-pole air switches (5) Power fuses, including current-limiting types (6) Outdoor and indoor fuse disconnecting switches (7) Fuse supports, fuse mountings, fuse hooks, fuse tongs, and fuse links, all of the type used exclusively with products listed in (1) through (6) (8) Removable switch blades for products listed in (1) through (3)



Revision Standard - Superseded. Service conditions and definitions for high-voltage fuses (above 1,000 V), distribution enclosed single-pole air switches, fuse disconnecting switches, and accessories for ac distribution systems are covered. These include enclosed, open, and open-link types of distribution cutouts and fuses; distribution current-limiting fuses; distribution oil cutouts; distribution enclosed single-pole air switches; power fuses, including current-limiting types; outdoor and indoor fuse disconnecting switches; fuse supports, mountings, hooks, and links, all of the type used exclusively with the above; and removable switch blades for certain products among the above.