prBAS EN IEC 62271-207:2025

IEC 62271-207:2023 applies to<br /> - gas-insulated switchgear (GIS) assemblies<br /> - for alternating current of rated voltages above 52 kV complying with IEC 62271-203, and<br /> - for direct current of rated voltages including and above 100 kV,<br /> - for indoor and outdoor installations, including their supporting structures,<br /> - AC metal-enclosed switchgear and controlgear assemblies for rated voltages above 1 kV and up to and including 52 kV complying with IEC 62271-200, ground or floor mounted, intended to be used under seismic conditions, and<br /> - AC solid-insulation enclosed switchgear and controlgear assemblies for rated voltages above 1 kV and up to and including 52 kV complying with IEC 62271-201, ground or floor mounted, intended to be used under seismic conditions.<br /> This third edition cancels and replaces the second edition published in 2012. This edition constitutes a technical revision. It also cancels and replaces, through merging, the first edition of IEC TS 62271-210 published in 2013.<br /> This edition includes the following significant technical changes with respect to the previous edition:<br /> a) modification of the minimum voltage rating from 52 kV to above 1 kV in order to include medium voltage equipment previously being within IEC TS 62271-210 scope;<br /> b) further harmonisation of qualification procedures with the revised IEEE Std 693-2018 [1], Annex A and Annex P, including<br /> 1) matching this document's required response spectra with IEEE Std 693-2018 performance level spectra and IEC TS 62271-210 spectra,<br /> 2) addition of a step-by-step procedure assisting the user of this document to select an appropriate seismic qualification level combining seismic integrity with cost-effective design,<br /> 3) addition of analytical earthquake component combination techniques, and<br /> 4) reference to publicly available accelerograms specially developed to match the IEEE Std 693-2018 spectra for testing and analysis purposes, since this document and IEC TS 62271-210 spectra are identical in shape with IEEE Std 693 spectra.<br /> c) various enhancements of test procedures;<br /> d) addition of minimum contents for seismic qualification reports;<br /> e) scope extended to cover DC GIS including and above 100 kV.