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IEC 60947-9-1:2019 ED1

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

Jan 16, 2019

General information

60.60     Jan 16, 2019

IEC

TC 121/SC 121A

International Standard

29.120.40     29.130.20  

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Scope

IEC 60947-9-1:2019 covers low-voltage arc quenching devices, hereinafter referred to as AQDs, which are intended to eliminate arc-faults in low-voltage assemblies (typically low-voltage 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.

Life cycle

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PUBLISHED
IEC 60947-9-1:2019 ED1
60.60 Standard published
Jan 16, 2019