... appearance 5.IEC62053-21 ApplicationDDS5168 single phase two wire active electronic watt-hour meter, cyclometer display.The ... or PC or steal or aluminum, and the terminal block is made of bakelite which is moisture-resistant, ... energy impulse.♦Single direction measures single phase two wire active power consumption. It is nothing with direction ... ,230,240,etc.Rated current(A)1.5(6), 2.5(10), 5(20), 10(40 ...