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EN IEC 60947-9-1:2019 Standard

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  Keywords:

#current #intended #circuit #aqds #assemblies

  Directive

Low voltage (LVD) Directive (2014/35/EU)

  Last Official Journal reference

Tuesday 22nd of July 2025

  Description:

Low-voltage switchgear and controlgear - Part 9-1: Active arc-fault mitigation systems - Arc quenching devices

  Purpose

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).

  Publication

Monday 3rd of August 2020

  Related Standards

EN 61071:2007

Low voltage (LVD) Directive (2014/35/EU)

Capacitors for power electronics

EN 60695-11-4:2011

Low voltage (LVD) Directive (2014/35/EU)

Fire hazard testing - Part 11-4: Test flames - 50 W flame - Apparatus and confirmational test method

EN 60947-4-2:2012

Low voltage (LVD) Directive (2014/35/EU)

Low-voltage switchgear and controlgear - Part 4-2: Contactors and motor-starters - AC semiconductor motor controllers and starters

EN 60947-1:2007

Low voltage (LVD) Directive (2014/35/EU)

Low-voltage switchgear and controlgear - Part 1: General rules

EN 60931-3:1996

Low voltage (LVD) Directive (2014/35/EU)

Shunt power capacitors of the non-self-healing type for a.c. systems having a rated voltage up to and including 1 kV - Part 3: Int...

EN 60931-1:1996

Low voltage (LVD) Directive (2014/35/EU)

Shunt power capacitors of the non-self-healing type for a.c. systems having a rated voltage up to and including 1 kV - Part 1: Gen...

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