Final answer:
A fuse cutout has two main functions: protecting the circuit from excessive current and disconnecting the circuit from the power source.
Step-by-step explanation:
A fuse cutout, also known as a fuse link or a fuse switch, is a device used in electrical systems to protect a circuit from excessive current. It consists of a fuse element and a switch mechanism. The two main functions of a fuse cutout are:
- Protecting the circuit: When the current flowing through the circuit exceeds the rated current of the fuse, the fuse element melts, interrupting the current and protecting the circuit from damage.
- Disconnecting the circuit: Once the fuse element melts and interrupts the current, the switch mechanism in the fuse cutout opens, disconnecting the circuit from the power source. This allows for safe maintenance or repair of the circuit.