Type DTSD306/DSSD306 three phase electronic multi-function watt-hour meter is a kind of advanced intellectualized meter with proprietary technology of our company. We adopt special integrated circuit, memorizer to reserve information permanently, standard RS485 communication interface, infrared communication interface, LCD display, and SMT assembling workmanship to design this kind of meter. It has many functions such as measuring active and reactive energy respectively, demand calculation, power factor calculation, average load power, displaying and transporting real-time voltage, current and power, record at voltage loss, reading meter, programming record, maximum demand clear record etc. Function and features: 1. Electronic multi-function meter can realize the function of measuring, recording, balancing and accounting, which should be used active energy meter, inactive energy meter, active demand meter, inactive demand meter, power factor meter, multi-rate meter to measure respectively. Electronic multi-function meter integrates the function of the above six kinds of meter. 2. With four tariffs. 3. With 12 sets of day-period-of-time 4. With tariff selection on day-off 5. With the function of measuring different energy on different period of time 6. With the function of detecting open phase and voltage loss. 7. With the function of authorization clear and prohibition clear. 8. LCD display 9. With RS485 communication interface and infrared communication interface to set parameter and read meter 10. Comply with IEC standard and China National Standard GB/T17215-2002(IEC62053-21-2003, IEC62052-11-2003), GB/T17882-1999(IEC-62053-23-2003, IEC62052-11-2003), GB/T17883-1999(IEC62053-22-2003, IEC62052-11-2003), DL/T645-1997, DL/T645-1997. Technical parameter: Clock error: 0.5s/day (at reference condition ) Creeping: Having anti-creeping circuit Adjusting range time period: 2min Power loss: ≤6VA Relative humidity: ≤ 85% Accuracy Class: Active: 0.5, 1.0; Inactive: 2.0 Rated Voltage (V): 3*100, 3*380 Basic Current (A): 3*1.5(6), 2*1.5(6), 2*5(20), 2*10(60)