Cover DIN EN IEC 60947-9-1 VDE 0660-120:2019-11

DIN EN IEC 60947-9-1 VDE 0660-120:2019-11

* German Language Version *

Low-voltage switchgear and controlgear

Part 9-1: Active arc-fault mitigation systems – Arc quenching devices

(IEC 60947-9-1:2019); German version EN IEC 60947-9-1:2019
Class/Status: Standard, valid
Released: 2019-11
VDE Art. No.: 0600244


This document covers low-voltage arc quenching devices, hereinafter referred to as AQD, which are intended to eliminate arcing faults in low-voltage assemblies (typically low voltage switchgear and controlgear assemblies according to 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, in derivation from the main distribution path, preferably as close as possible to all primary power sources.