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 Features:Simultaneously measure three-phase AC voltage, current, phase ... 1 pc. .Field Application ETCR4300 Intelligent Three Phase Digital Phase Volt-Ampere Meter----Manufactory, RS232 interface