IEC 60947-9-1:2019
Low-voltage switchgear and controlgear - Part 9-1: Active arc-fault mitigation systems - Arc quenching devices
Abstract
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.
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.
Additional information
Publication type | International Standard |
---|---|
Publication date | 2019-01-16 |
Edition | 1.0 |
Available language(s) | English/French, Spanish |
TC/SC | TC 121/SC 121A - Low-voltage switchgear and controlgearrss |
ICS | 29.120.40 - Switches 29.130.20 - Low voltage switchgear and controlgear |
Stability date | 2024 |
Pages | 37 |
File size | 1168 KB |
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