A fuse is an electrical appliance that, when the current in the circuit exceeds a certain value, fuses the melt by self-heating, and disconnects the circuit to protect the circuit. It is widely used in high and low voltage power distribution systems, control systems and electrical equipment, and is one of the most popular protection devices.
The circuit protection function of the fuse refers to the protection of the electric wires and the electric equipment. The protection of the electric wires is to prevent the electric wires from catching fire, and the electric power equipment is overload protection to avoid burning the electric equipment. Therefore, when designing the electrical system, the system matching problem between the power of the electrical equipment, the wires and the fuse should be fully considered.