IEC/TS 62271-210-2013 pdf free.High-voltage switchgear and controlgear -Part 210: Seismic qualification for metal enclosed and solid-insulation enclosedswitchgear and controlgear assemblies for rated voltages above 1 kV and up toand including 52 kV. 4.2 PrelimInary analysis 4.2.1 SelectIon...