DIN EN IEC 62271-214:2024-12

This part of IEC 62271 specifies requirements for internal arc classification of AC metal-enclosed pole-mounted switchgear and controlgear with rated voltages above 1 kV and up to and including 52 kV with service frequencies up to and including 60 Hz. This document is applicable to three-phase, two-phase and single-phase open terminal equipment for which an internal arc classification is assigned. Enclosures may include fixed and removable components and may be filled with fluid (liquid or gas) to provide insulation. The internal arc classification IAC takes the layout of high-voltage switchgear and switchgear assemblies and the employee's working area into consideration. For the purposes of this document, the term high voltage (IEC 60050-601:1985, 601-01-27) is defined as a rated voltage above 1 000 V. However, medium voltage (IEC 60050-601:1985, 601-01-28) is generally used for distribution networks with voltages above 1 kV and is generally applied up to and including 52 kV. This document does not exclude the possibility that other equipment may be contained in the same enclosure. In such a case, any possible influence of this equipment on the switchgear shall be taken into account. The standard differs from DIN EN IEC 62271-214 (VDE 0671-214):2020-06 as follows: a) indicators positioning update; b) neutral earthing connection of the test circuit for three-phase tests; c) general review for consistency with IEC 62271-200, Ed.3.0:2021.