On-line AC current measurement below 500kV (above 600V operate with insulated rod). 1. Model No.: ETCR9310B 2. Measurement Range :0.00A~9999A(50/60Hz automatic) 3. DataStorage:99 groups 4. Test Mode : Non-contact U-type CT 5. CT Size : Ф68mm 6. Power Supply: 6V DC(LR03×8 alkaline dry batteries)