NF C64-471-1*NF EN 62271-1:2017 High-voltage switchgear and controlgear - Part 1 : common specifications for alternating current switchgear and controlgear
2017NF C64-471-1*NF EN 62271-1:2017 High-voltage switchgear and controlgear - Part 1 : common specifications for alternating current switchgear and controlgear