2015BS EN 62271-104:2015 High-voltage switchgear and controlgear. Alternating current switches for rated voltages higher than 52 kV
2009BS EN 62271-104:2009 High-voltage switchgear and controlgear - Part 104: Alternating current switches for rated voltages of 52 kv and above
1991BS EN 60265-2:1991 Specification for high-voltage switches - Specification for high-voltage switches - High-voltage switches for rated voltages of 52 kV and above