What is the function of a fuse in an electrical system?

The function of a fuse in an electrical system is to protect the circuit from overcurrent conditions. When the current flowing through the fuse exceeds a certain level, which indicates a potential malfunction or overload, the fuse will "blow" or melt. This action interrupts the flow of electricity, effectively breaking the circuit and preventing damage to the electrical components and reducing the risk of fire.

Fuses are crucial safety devices in electrical systems, as they help to ensure that the system operates within safe limits and safeguard against hazardous situations. In essence, a properly functioning fuse keeps the electrical system safe by serving as a weak point that sacrifices itself to protect the circuit from excess current.