The correct answer is: D. circuit breakers.
A fault diverter is a type of circuit breaker that is designed to protect electrical circuits from faults. It does this by detecting a fault current and then interrupting the circuit to prevent damage to the equipment or the circuit itself.
Fuses are a type of safety device that is used to protect electrical circuits from overloads and short circuits. They work by melting when a current that is too high flows through them. This interrupts the circuit and prevents damage to the equipment or the circuit itself.
Relays are electromechanical devices that are used to control electrical circuits. They work by opening and closing contacts in response to an electrical signal. This can be used to control the flow of power to a circuit or to switch on and off devices.
Fast switches are a type of switch that is designed to switch on and off very quickly. They are often used in high-speed applications where it is important to minimize the time it takes for a circuit to be switched on or off.
In conclusion, fault diverters are basically circuit breakers. They are designed to protect electrical circuits from faults by detecting a fault current and then interrupting the circuit.