Fuses shall be selected according to the following criteria.
Maximum operational voltage – shall be equal or greater than the system operating voltage.
Rated breaking capacity – shall be equal to or greater than the maximum fault current expected in the circuit downstream the fuse.
Rated current – shall be equal to or greater than the continuous operating current of the circuit protected by the fuse.
Breaking range – partial range or full range breaking capacity according to the type of protection required.
Utilisation category – select according to the nature of equipment to be protected.