The Working Principle Of Fuses

The working principle of a fuse is that when current passes through a conductor, there is a certain resistance in the conductor, so the conductor will generate heat. After the material and shape of the fuse are determined, its resistance is also determined. As the current increases, the resistance value of the fuse also increases, and its resistance value is proportional to the square of the energized current. According to Joule's law: Q=I ² When the current is too high, the conductor of Rt will melt and cut off the current, thereby protecting the circuit, electrical appliances, and people using fuses from accidents such as fire or electric shock.