... in low-voltage switchger 3)for indoor application SDH-0.66 Series Current Transformer Technical:Primary current: 100A-5000ASecondary ... accommodate all the existing installationsModelRated current(A) Primary/secondarySDH-0.66-40100/5, 150/5, 200/5, 250/5 ... 5, 750/5, 800/5, 1000/5, 1200/5ASDH-0.66-80500/5, 600/5, 750/5, 800/5, ... 5, 1600/5, 2000/5, 2500/5, 3000/5ASDH-0.66-1201000/5, 1200/5, 1500/5, 1600/5, ...