Intelligent Three Phase Digital Phase Volt-Ampere Meter 1.measure AC voltage,current,phase,frequency,phase sequence,power ETCR 4300 Intelligent Three Phase Digital Phase Volt-Ampere Meter Our ... 4300Product Category:Tester-Double Clamp /Three Phase Digital Phase Meter Features:Simultaneously measure three-phase AC voltage, current, phase, frequency, phase sequence, power, current vector sum ...