EN 60947-9-1
EN 60947-9-1 specifies requirements for insulated shrouded busbar systems used in low-voltage switchgear and controlgear assemblies.
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Organization: EN Standards for EMC Testing
Amendment Year: 2022
Application
Overview
IEC 60947-9-1 specifies low-voltage arc quenching devices (AQDs) designed to eliminate arc faults in low-voltage assemblies, like switchgear and controlgear in line with IEC 61439. AQDs create a lower impedance path to redirect the arcing current until a short-circuit protection device (SCPD) interrupts it. They are installed close to primary power sources in the main circuit and are rated for voltages up to 1,000 V AC or 1,500 V DC.
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