What safety device can detect an arc fault and disconnect the power?

The Arc-Fault Circuit Interrupter is specifically designed to detect arc faults, which can occur when there is an unintentional electric discharge or arc between conductors in a circuit. These types of faults can create high temperatures and pose serious fire hazards. The Arc-Fault Circuit Interrupter works by monitoring the electrical current and identifying the unique characteristics of arcing. Once an arc is detected, it quickly disconnects the power to prevent potential fires and ensure the safety of the environment.

Other devices mentioned, such as fuses and ground fault circuit interrupters, serve different protective functions. Fuses provide overcurrent protection, while ground fault circuit interrupters are designed to prevent electrical shock by detecting imbalances between outgoing and incoming current. Overcurrent relays protect against excessive current surges but do not specifically detect arcing conditions. Thus, the Arc-Fault Circuit Interrupter is the appropriate safety device for this particular function.