This part of IEC 60947 covers low-voltage arc quenching devices@ hereinafter referred to as AQDs@ which are intended to eliminate arc-faults in low-voltage assemblies (typically lowvoltage switchgear and controlgear assemblies in accordance with the IEC 61439 series)@ by creating a lower impedance current path@ to cause the arcing current to transfer to the new current path. This new current path is maintained until a short-circuit protection device (SCPD) interrupts the short-circuit current. AQDs are installed in low-voltage assemblies@ connected to the main circuit@ preferably as close as possible to all primary power sources. Their rated voltage does not exceed 1 000 V AC or 1 500 V DC. This document does not cover: ? sensors intended to detect arc-faults; ? devices intended to trigger the functioning of the arc quenching device; ? devices intended to interrupt arc-fault current; ? special requirements for AQDs for use in explosive atmospheres (e.g. ATEX).