IEC 60947-3:2015 pdf download - Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units. 4.3.1 .3 Rated impulse withstand voltage (U imp ) Subclause 4.3.1 .3 of IEC 60947-1 applies. 4.3.2 Currents An...