SCT31xx | 3-phase ring-type current transformers, size 1Further InformationSCT31xx | GeneralSCT3111 | 3-phase ring-type current transformer for primary currents 3 x 0...50 A AC to 3 x 0....150 A AC, accuracy class 1, size 1SCT3121 | 3-phase ring-type current transformer for primary currents 3 x 0...125 A AC / 3 x 0...150 A AC, accuracy class 0.5, size 1