Which type of power system has a transmitter at the power source and a receiver near the load, constantly monitoring circuit parameters and able to open the circuit in the event of a fault?

Which type of power system has a transmitter at the power source and a receiver near the load, constantly monitoring circuit parameters and able to open the circuit in the event of a fault?

• A. low voltage
• B. PoE
• C. uninterruptible
• D. fault-managed

Answer: (D)

This question is about a power system that actively watches for faults and can instantly isolate the circuit to protect equipment and people. By placing a transmitter at the power source and a receiver near the load, the system can continuously monitor parameters such as voltage, current, and fault conditions across the circuit. When a fault is detected, the ability to open the circuit quickly prevents damage, reduces arc flash risk, and improves safety and reliability. That proactive fault-detection and disconnection capability is what “fault-managed” describes. The other options don’t fit this behavior. A low-voltage designation only describes the voltage level, not a fault-detection and circuit-termination scheme. PoE refers to delivering power over Ethernet with network data, sometimes including remote management, but it isn’t defined by continuous fault monitoring with automatic disconnection at the load. An uninterruptible system focuses on maintaining power during outages, not on fault detection and immediate disconnection to isolate faults.

This question is about a power system that actively watches for faults and can instantly isolate the circuit to protect equipment and people. By placing a transmitter at the power source and a receiver near the load, the system can continuously monitor parameters such as voltage, current, and fault conditions across the circuit. When a fault is detected, the ability to open the circuit quickly prevents damage, reduces arc flash risk, and improves safety and reliability. That proactive fault-detection and disconnection capability is what “fault-managed” describes.

The other options don’t fit this behavior. A low-voltage designation only describes the voltage level, not a fault-detection and circuit-termination scheme. PoE refers to delivering power over Ethernet with network data, sometimes including remote management, but it isn’t defined by continuous fault monitoring with automatic disconnection at the load. An uninterruptible system focuses on maintaining power during outages, not on fault detection and immediate disconnection to isolate faults.