These supplementary requirements apply to fuse-links for application in equipment containing semiconductor devices for circuits of nominal voltages up to 1 000 V a.c. or 1 500 V d.c. and also, in so far as they are applicable, for circuits of higher nominal voltages. Such fuse-Iinks are commonly referred to as “semiconductor fuse-links”.
In most cases, a part of the associated equipment serves the purpose of a fuse-base. Owing to the great variety of equipment, no general rules can be given; the suitability of the associated equipment to serve as a fusebase should be subject to agreement between the manufacturer and the user. However, if separate fuse-bases or fuse-holders are used, they should comply with the appropriate requirements of IEC 60269-1.
The object of these supplementary requirements is to establish the characteristics of semiconductor fuse-links in such a way that they can be replaced by other fuse-links having the same characteristics, provided that their dimensions are identical. For this purpose, this standard refers to:
Characteristics of fuses:
- Rated values
- Temperature rises in normal service
- Power dissipation
- Time-current characteristics
- Breaking capacity
- Cut-off current characteristics and their I2t characteristics
- Arc voltage limits
- Type tests for verification of the characteristics of fuses
- Markings on fuses
- Availability and presentation of technical data
