Fuse

Fuse is an electrical device that protects electrical cables, electrical equipment, electronic components and circuitry from damage by excessive current. Fuse forms the weakest point of the circuit. By passing of electric current through the fuse, the raising electrical resistance of the fuse conductor causes the voltage drop and power loss in the form of heat. Blowing the fuse will break the circuit. The scene comprises of a circuit with an ammeter showing a gradual increase in the current flow in dependence on increasing fan power. At some point, the fusible element is blown and the circuit is broken.