(1) Good selectivity. As long as the rated current of the fuse link of the upper and lower fuses meets the requirements of the overcurrent selection ratio of 1.6:1 stipulated by the national standard and the IEC standard, that is, the rated current of the upper fuse link is not less than 1.6 times the value of the lower level, it is regarded as the upper and lower level energy. Selective cut-off of fault current.
(2) Good current limiting characteristics and high breaking capacity.
(3) Relatively small size.
(4) The price is cheaper.
