BS EN IEC 60947-9-2:2025 PDF

Low-voltage switchgear and controlgear - Active arc-fault mitigation systems. Optical-based internal arc-detection and mitigation devices

First page of standard BS EN IEC 60947-9-2:2025

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Title (English):

BS EN IEC 60947-9-2:2025

Low-voltage switchgear and controlgear - Active arc-fault mitigation systems. Optical-based internal arc-detection and mitigation devices

Document status:: Active
Format:: Electronic (PDF)
Publication date:: July 31, 2025
ICS:: 29.120.40
SKU:: BS EN IEC 60947-9-2:2025

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Abstract

1 Scope This document covers internal arc-fault control devices, hereinafter referred to as IACD, which are intended to:

detect internal arc-faults in low-voltage switchgear and controlgear assemblies, by processing (at a minimum) the optical effect of an internal arc-fault, and operate mitigation device (either external or combined)

in order to minimize the effects of the internal arc-fault (see Figure 1). For the purpose of this document the terms "light" or "optical" covers more than visible spectra. They may cover also, for example, infrared or ultraviolet electromagnetic radiations (see Annex D). For combined-type IACD, this document is considered in addition to the relevant product standard for internal arc-fault mitigation devices (IARD per IEC TS 63107:2020 ). Compliance to the relevant product standard is mandatory and cannot be claimed by testing to this document alone. NOTE 1 Low-voltage switchgear and controlgear assemblies are usually described by

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1 Scope This document covers internal arc-fault control devices, hereinafter referred to as IACD, which are intended to:

BS EN IEC 60947-9-2:2025 PDF

Abstract

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Abstract

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