Features: 1) Intelligent equipment 2) Tests CT /PT voltage and current 3) Voltage-current characters tester the tester is a kind of ... volt-ampere characteristics, ratio, polarity, demagnetization, checks for primary current, ACTV and so on. When test, once set the ... the volt-ampere characteristics of CT/PT, ratio, polarity, error curve of 5% ,10%, primary current, ACTV and demagnetization.Large ...