BS EN IEC 62271-112:2021 High-voltage switchgear and controlgear. Alternating current high-speed earthing switches for secondary arc extinction on transmission lines
2021BS EN IEC 62271-112:2021 High-voltage switchgear and controlgear. Alternating current high-speed earthing switches for secondary arc extinction on transmission lines
2013BS EN 62271-112:2013 High-voltage switchgear and controlgear. Alternating current high-speed earthing switches for secondary arc extinction on transmission lines
BS EN IEC 62271-112:2021 High-voltage switchgear and controlgear. Alternating current high-speed earthing switches for secondary arc extinction on transmission lines was changed to BS EN 62271-112:2013 High-voltage switchgear and controlgear. Alternating current high-speed earthing switches for secondary arc extinction on transmission lines.