BS EN IEC 62271-207:2023 High-voltage switchgear and controlgear. Seismic qualification for gas-insulated switchgear assemblies, metal enclosed and solid-insulation enclosed switchgear for rated voltages above 1 kV
1970BS EN IEC 62271-207:2023 High-voltage switchgear and controlgear. Seismic qualification for gas-insulated switchgear assemblies, metal enclosed and solid-insulation enclosed switchgear for rated voltages above 1 kV