... by 0.5 Hz low frequency method;-Test CT/PT Turns ratio, Polarity, ratio error & phase angle ... by voltage method.-Can be used at CT/PT large manufacturers or sub-station with high voltage ... class, TP class , booting CT, various voltage class PT, etc. Specifications-Output voltage:0-180V(RMS);-Output current ... (Peak)-Voltage/Current measure accuracy:+-0.2%-CT/PT Turns ratio range:1-10000,accuracy:+-0.2%- ...