The fuse cannot be replaced by iron wire or copper wire, because the fuse is made of lead antimony alloy with high resistivity and low melting point. The resistance of copper wire and iron wire is small, and the heat generated is relatively small. It is not easy to fuse when the circuit has a fault of excessive current, so the circuit cannot be protected. The function of fuse in the circuit is to protect the overload.
Can the fuse be replaced by iron wire or copper wire?
Fuse, also called current fuse, is a kind of fuse link, which is mainly used to cut off the current when the current rises abnormally to a certain height or the heat is suitable for itself, so as to protect the safe operation of the circuit. It cannot be replaced by iron wire or copper wire.
The fuse is generally made of lead antimony alloy with high resistivity and low melting point. Under the same external conditions, the resistance of copper wire and iron wire is relatively small, and the heat generated is also relatively small. At the same time, the melting point of iron and copper is relatively high, so it is not easy to fuse when the circuit has a fault of excessive current, and the circuit cannot be protected.
Classification of fuses
There are many kinds of fuses, which can be divided into overcurrent protection and overheat protection according to the protection form; According to the scope of use, it can be divided into power fuse, machine tool fuse, electrical instrument fuse, etc; According to volume, it can be divided into large, medium, small and micro; According to the breaking capacity, it can be divided into high and low breaking capacity fuses.