Current, transformation ratio, polarity and phase difference test of the transformer and current transformer primary and secondary circuits below 35kV. 1. Model No.: ETCR9500B 2. Turn Ratio Range:1~500 3. Primary Current Test Accuracy: 0.0A~800A/0.1A/ ±0.5%FS 4. Secondary Current Test Accuracy: 0.00mA~5A/0.01mA/ ±0.5%FS 5. CT Size:φ48mm & φ8mm 6. Power Supply: DC6V alkaline batteries LR03 (1.5V AAA X 8)