... Test Sets are composed of seven items as below:-Instrument Transformer Tester, Model ITC-C,-Standard reference CT, Model HL-62CS ... the polarity fault and the ratio mistake. Technical Specifications: Instrument Transformer Tester, Model ITC-C -Input: Power Frequency: 50Hz±0.5Hz ... ,300,315,400, ² 500,600,630,750,800,1000,1200,1250,1500,160,2000,2500,3000,3150,4000,5000A ² Secondary:5 ...