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NEK IEC 60947-9-1:2019

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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.

Dokumentinformasjon

  • Standard fra NEK
  • Publisert:
  • Utgave: 1.0
  • Versjon: 1
  • Varetype: NAT
  • ICS 29.120.40
  • ICS 29.130.20
  • National Committee NEK/NK121

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