With the needs of industrial development, special fuses suitable for various requirements are also manufactured, such as electronic fuses, thermal fuses and resettable fuses.
The fuse is a simple and effective protective electrical appliance. It mainly plays the role of short circuit protection in the circuit. The fuse is mainly composed of a melt and an insulating tube (insulating base) in which the melt is installed. When used, the melt is connected in series to the protected circuit. When a short-circuit fault occurs in the circuit, the melt is instantly blown and the circuit is disconnected, thus playing a protective role. The function of the fuse is: when a fault or abnormality occurs in the circuit, the current will continue to increase, and the increased current may damage some important or valuable components in the circuit, and may also burn the circuit or even cause a fire. If the fuse is correctly installed in the circuit, then the fuse will blow itself and cut off the current when the current abnormally rises to a certain height and at a certain time, thereby protecting the safe operation of the circuit. The earliest fuse was invented by Edison more than a hundred years ago. Due to the underdeveloped industrial technology at that time, incandescent lamps were very expensive, so it was originally used to protect expensive incandescent lamps.
