... computer. Description: The test set used for CT site calibration at power frequency state. The tested CT accuracy can reach ... Primary:5,7.5,10,15,20,25,30,40,50,60,75,80,100,120,150,160,200,250,300 ... V-Input current: 100A -Ambient Temperature: -20°C to 50°C -Meter accuracy class:1.0 -Timing range:0-999S ... °C -Humidity: <80%(25°C) -Altitude :< 2500m High Accuracy Calibration of current transformer Tester