AC current on-line measurement below 500kV (operate with insulation rod above 600V). 1. Model No.: ETCR9330B 2. Measurement Range :0.00A~9999A 3. DataStorage :99 groups 4. Test Mode : Hook type opening mouth structure 5. CT Size : Ф128mm 6. Power Supply : 6V DC(1.5V AAA×4 alkaline dry batteries)