Early detection of arc faults in the electrical installation can contribute to fire protection in residential and commercial installations, resulting in additional safety for people and valuable assets. Compliant with the international product standard “IEC 62606 – General Requirements for Arc Fault Detection Devices”, ABB's AFDDs mitigate the risks of fires caused by faulty electrical installations. The following guide will help application users to understand the physical phenomenon of an electrical arc, the functioning of the devices, the main features and benefits.