Three Phase Digital Power Clamp Meter V, A, W, VA, VAR, KWh, PF, Hz measurement RS232 ... time and select tested signal be power supply for the clamp at one time, the instrument can measurement for long time ... controlSPECIFICATIONSMax conductor size50mmAC current(A)40/100/400/1000A±2%AC voltage(V)100/300/600V±1.2%Active power(kW ...