Low-voltage switchgear and controlgear Active arc-fault mitigation systems. Arc quenching devices

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Hardcopy , PDF

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English

Published date

14-06-2019

Publisher

British Standards Institution

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 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 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. 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).

Committee	PEL/121/1
DocumentType	Standard
ISBN	9780580966231
Pages	26
ProductNote	THIS STANDARD ALSO REFERS TO IEC TS 63107, IEC 60947-9-2, EN 61439, EN 55011:2016, EN 60947-1:2007,
PublisherName	British Standards Institution
Status	Current

Standards	Relationship
EN IEC 60947-9-1 : 2019	Identical
IEC 60947-9-1:2019	Identical

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BS EN IEC 60947-9-1:2019

Low-voltage switchgear and controlgear Active arc-fault mitigation systems. Arc quenching devices

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