... test point IEC60185 applied Test Sets Composed of:High Accuracy CT site Calibrating Test Sets are ... composed of seven items as below:-Instrument Transformer Tester, ... PT;-Automatic sampling at test point -Automatic identification of the polarity fault and the ratio mistake. Technical ... current ratio: ² Primary:5,7.5,10,15,20,25,30,40,50,60,75,80,100,120,150,160, ...