... APPLICATIONDTSY866 three phase four wire electronic prepaid energy meter,LCD display.This meter has prepaid function,for the users pay firstly use ... best way to solve payment-collect problems2. FUNCTIONS AND FEATURES♦Meter casing ABS anti-flaming(PC optional),with transparent PC window ... 3(6), 5(20), 10(40), 15(60), 20(80), 30(100),etc.Rated frequency50Hz or 60HzOperation voltage rangeUn±20%Insulation ...