Low-voltage fuses - Part 1: General requirements

This standard is applicable to fuses incorporating enclosed current-limiting fuse-links with rated breaking capacities of not less than 6 kA, intended for protecting power-frequency a.c. circuits of nominal voltages not exceeding 1000 V or d.c. circuits of nominal voltages not exceeding 1500 V. Subsequent parts of this standard, referred to herein, cover supplementary requirements for such fuses intended for specific conditions of use or applications. Fuse-links intended to be included in fuse-switch combinations according to IEC Publication 408: Low-voltage Air-break Switches, Air-break Disconnectors, Air-break Switch Disconnectors and Fuse-combination Units, should also comply with the following requirements. Notes 1. - For "a" fuse links, details of performance (see Sub-clause 2.2.4) on d.c. circuits should be subject to agreement between user and manufacturer. 2. - Modifications of, and supplements to, this standard required for certain types of fuses for particular applicaptions for example certain fuses for rolling stock, or fuses for high- frequency circuits will be covered, if necessary, by separate standards. 3. - This standard does not apply to miniature fuses, these being covered by IEC Publication 127: Cartridge Fusep links for Miniature Fuses, and IEC Publication 257: Fusepholders for Miniature Cartridge Fuseplinks.