For 3 phase 4 wire network Measurement for active energy Excellent Measuring Sensitive Button LCD display digit: 6 digits ( Main Function:For 3 phase 4 wire networkMeasurement for active energyExcellent Measuring Sensitive ButtonLCD display digit: 6 digits (5 integer+1 decimal)Life: More than 10 yearsApplied Standard IEC 62053-21Option:Communication: RS485, IR, RF, PLCCPower on-off function Rated ...