... Sets are composed of seven items as below:-Instrument Transformer Tester, Model ITC-C,-Standard reference CT, Model HL-62CS- ... polarity fault and the ratio mistake. Technical Specifications: Instrument Transformer Tester, Model ITC-C -Input: Power Frequency: 50Hz±0.5Hz, Power ... accuracy class:1.0 -Timing range:0-999S Primary Current Injector, model SL-7: -Rated capacity:20KVA-Input voltage : 0~250V ...