High-voltage switchgear and controlgear - Part 104: Alternating current switches for rated voltages of 52 kV and above (IEC 62271-104:2009) (english version)
High-voltage switchgear and controlgear -- Part 104: Alternating current switches for rated voltages higher than 52 kV ( IEC 62271-104:2015) (english version)
High-voltage switchgear and controlgear -- Part 104: Alternating current switches for rated voltages higher than 52 kV ( IEC 62271-104:2015) (english version)