... -functional 4.Infrared,RS485 5.IEC62053-21 DTSD5168 Three phase electronic multifunction watt-hour meter FUNCTIONS AND FEATURES♦ ... reactive power, voltage, current and frequency, etc. of three-phase four-wire forward and reverse. Complying with standard IEC ... 5(6), 3(6), 5(20), 10(40), 15(60), 20(80), 30(100)Reactive Class2.03 ... 5(6), 3(6), 5(20), 10(40), 15(60), 20(80), 30(100) MAIN TECHNICAL PARAMETER ...