IEC 62271-2:2003 HIGH-VOLTAGE swITCHGEAR AND CONTROLGEAR一Part 2: Seismic qualification for rated voltages of 72,5 kV and above

IEC 62271-2:2003 HIGH-VOLTAGE swITCHGEAR AND CONTROLGEAR一Part 2: Seismic qualification for rated voltages of 72,5 kV and above 1 Scope and object This part of lEC 62271 applies to all switchgear and their assemblies for alternating current ofrated voltages of 72,5 kV and above for indoor and outdoor installation，including theirsupporting structure rigidly connected to the ground. Where switchgear and their assemblies are not ground mounted,e.g. in a building, conditionsfor application are subject to agreement between users and manufacturers. The seismic qualification of the switchgear and their assemblies take into account anyauxiliary and control equipment either directly mounted or as a separate structure. This standard provides procedures to seismically qualify ground mounted switchgear and theirassemblies for rated voltages of 72,5 kV and above. The seismic qualification of the switchgear and their assemblies is only performed uponrequest. This standard specifies seismic severity levels and gives a choice of methods that may beapplied to demonstrate the performance of high-voltage switchgear and their assemblies forwhich seismic qualification is required. 2Normative references The following referenced documents are indispensable for the application of this document.For dated references, only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.