2021BS EN IEC 61439-2:2021 Low-voltage switchgear and controlgear assemblies. Power switchgear and controlgear assemblies
2011BS EN 61439-2:2011 Low-voltage switchgear and controlgear assemblies. Power switchgear and controlgear assemblies
BS EN IEC 61439-2:2021 Low-voltage switchgear and controlgear assemblies. Power switchgear and controlgear assemblies was changed to BS EN 61439-2:2011 Low-voltage switchgear and controlgear assemblies. Power switchgear and controlgear assemblies.