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Date：08-18-2022
Fuse is also called fuse, melt. The residential total fuse is installed after the electric energy meter, and the porcelain plug-in fuse is generally used. Now as the total protection of the house, circuit breakers are usually used instead of fuses. Urban and rural individual workshops, old urban houses and some rural houses also use fuses as general protection. In addition, many household appliances are equipped with fuses, such as color TVs, microwave ovens, tape recorders, air conditioners, washing machines, etc., as the protection of household appliances.
Fuses are mainly used for short-circuit protection of electrical equipment and lines. Because when the electrical equipment or line has a short-circuit fault, the current in the loop increases rapidly, and the fuse is blown immediately, thereby protecting the electrical equipment and line from damage or causing the accident to further expand.
The fuse can also play a certain role in the overload of electrical equipment and lines. When the overload current exceeds 2 times the rated current of the fuse, the fuse can be blown within 3 to 4 minutes, so it can also play a certain degree of overload protection. But this kind of protection is very unreliable, because the fuse characteristics have great dispersion, even if the fuses of the same specification have different fuse currents.
