Instructions On Selecting The Rated Current Of Drop-out Fuses
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Considering the maximum long-term load current of the protected equipment as I_max, the rated current of the drop out fuse fuse should be designed to be I_nom ≥ 1.3 × I_max. This ratio helps maintain the safety margin of the fuse as an overload protection element under daily load. The rated current of the drop-out fuse should not be less than 1.3 times the maximum long-term load current of the protected equipment, reflecting the engineer's comprehensive consideration of factors such as long-term load, changes in ambient temperature, and component aging.
