The correct answer is D. all of the above.
A relay is an electromagnetic switch that is used to control a circuit by opening or closing a switch. A rewirable fuse is a type of fuse that can be reset after it has blown. An H.R. is a high-resistance device that is used to protect circuits from overloads.
All of these devices can provide information to the circuit breaker under fault conditions. The relay can provide information about the current in the circuit, the rewirable fuse can provide information about the voltage in the circuit, and the H.R. can provide information about the temperature in the circuit. This information can be used by the circuit breaker to determine whether or not to trip the circuit.
A relay is an electromagnetic switch that is used to control a circuit by opening or closing a switch. When current flows through the coil of the relay, it creates a magnetic field that attracts a metal lever. This lever then moves and opens or closes the switch. Relays are used in a variety of applications, including controlling motors, lights, and other devices.
A rewirable fuse is a type of fuse that can be reset after it has blown. A fuse is a device that is designed to protect a circuit from damage caused by an overload of current. When too much current flows through a fuse, the fuse wire melts and breaks the circuit. A rewirable fuse has a fuse wire that can be replaced after it has blown. This makes rewirable fuses a convenient and cost-effective way to protect circuits.
An H.R. is a high-resistance device that is used to protect circuits from overloads. An H.R. is a type of resistor that has a high resistance to current flow. When too much current flows through an H.R., the heat generated by the current flow can cause the H.R. to fail. This failure will open the circuit and protect the circuit from damage.