company news about What are the advantages and disadvantages of fuse

(1) Main advantages of fuse:
① Good selectivity. As long as the rated current of the fuse link of the upper and lower fuses meets the requirements of 1.6:1 overcurrent selection ratio specified in the national standard and IEC standard, that is, the rated current of the upper fuse link is not less than 1.6 times that of the lower fuse link, it is considered that the upper and lower fuse links can selectively cut off the fault current;
② Good current limiting characteristics and high breaking capacity;
③ The relative size is small;
④ The price is cheaper.

(2) Main disadvantages of fuse
① The fuse link must be replaced after fault fusing;
② The protection function is single, only one section of overcurrent inverse time characteristic, overload, short circuit and ground fault all use this protection;
③ In case of one-phase fuse, the three-phase motor will lead to the adverse consequences of two-phase operation. Of course, the fuse with alarm signal can be used to compensate, and the one-phase fuse can disconnect the three-phase;
④ Remote control cannot be realized. It is possible only when it is combined with electric knife switch and switch.