What is the purpose of a fuse in electrical apparatus?

The purpose of a fuse in electrical apparatus is to protect circuits from overloading. A fuse serves as a safety device designed to break the circuit when the current exceeds a specific threshold. This is crucial because excessive current can lead to overheating, which poses a risk of fire or damage to electrical components. By interrupting the flow of electricity when necessary, a fuse effectively prevents potential hazards associated with overcurrent conditions.

In various electrical systems, the fuse ensures that the equipment operates within its safe limits, providing an essential safeguard against damage. When the current surges due to short circuits, equipment failure, or other abnormalities, the fuse melts or breaks, thereby halting the electrical flow and protecting both the circuit and connected devices.