AFDD(Arc Fault Detection Device) AFDD stands for Arc Fault Detection Device. It is a safety device used to detect and protect against electrical arcs, which can cause fires. An AFDD monitors the electrical system for abnormal arcing conditions and quickly interrupts the circuit if an arc fault is detected. Arc faults can occur due to damaged or deteriorating wiring, loose connections, or other electrical faults. AFDDs are designed to detect the unique characteristics of arc faults and distinguis