2. Major shortcomings and weaknesses of the fuse must be replaced 1) fuse fuse failure; 2) protection single, fuses, only some characteristics of inverse time overcurrent, resettable fuse, overload, short circuit and ground fault both with this protection; 3) the occurrence of a phase is blown, three-phase motor will lead to adverse consequences of the two-phase operation, of course, an alarm signal can be used with a fuse to be filled, a fuse to disconnect the three-phase phase; 4) remote control can not be achieved, fuses price, need electric knife switch, switch combinations possible. Fuses and circuit breakers are able to achieve the same point short circuit protection, fuse factory outlets, fuses principle is to use the current flowing through a conductor will heat conductor, after reaching the melting point of conductors melting so disconnected circuit protection and electrical lines not be burned. It is an accumulation of heat, so it can achieve overload. Once burned to be replaced melt melt. Fuse, fuse, Xi'an by the Xi'an high Huayi power plant. Xian Huayi Electric Power Equipment Factory (www.xahy.com) strong, credible, in the Xi'an high-voltage circuit breakers and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Huayi electricity into the brilliant and you work for a better future!