High-voltage switchgear and controlgear – Part 207: Seismic qualification for gas-insulated switchgear assemblies for rated voltages above 52 kV

Published by	Publication Date	Number of Pages
IEC	04/27/2012	40

Category: IEC

Description

IEC 62271-207 Ed. 2.0 b – High-voltage switchgear and controlgear – Part 207: Seismic qualification for gas-insulated switchgear assemblies for rated voltages above 52 kV

IEC 62271-207:2012 applies to gas-insulated switchgear assemblies for alternating current of rated voltages above 52 kV for indoor and outdoor installations, including their supporting structure. This second edition of IEC 62271-207 cancels and replaces the first edition published in 2007. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
– modification of the minimum voltage rating from 72,5 kV to above 52 kV;
– harmonisation of qualification procedures for GIS with IEEE 693:2005 Annex A and P by modifying the response spectra;
– modification of the test procedures;
– addition of criteria of allowed stresses;
– addition of dynamic analysis CQC.