1. Purpose and Scope of Application
The AT28E-DF3 three-phase multi rate active multifunctional energy meter is a new generation intelligent energy meter developed and produced using advanced microelectronics technology and SMT process.
This meter implements time-sharing measurement, sets daily automatic data transfer, programs and reads meters on handheld terminals or PCs, and displays on LCD screens; It can be set with 4 rates, 12 time periods, 2 time zones, and 12 digit meter numbers, and has power test pulse output.
The electric energy meter should be installed inside an indoor or outdoor meter box, in an environment with a temperature range of -25 ℃ to 55 ℃ and a relative humidity not exceeding 95%.
This product complies with the 1.0 level three-phase electronic energy meter in IEC1036 and GB/T17215.321-2008 standards, and meets the technical requirements for multi rate energy meters in GB/T15284-2002 "Special Requirements for Multi rate Energy Meters". All products are self-developed and produced by our company, supporting customized functions. Please contact our company for details.
2. Main functions and features
2.1 Time division active and reverse energy measurement, reactive energy measurement, can be divided into 4 rates and 12 time periods.
2.2 Infrared communication, programming settings, and meter reading can be performed through a handheld computer.
2.3 It is possible to implement parameter rotation, and the parameters (not exceeding 32 items) and time intervals of the rotation can be pre-set. The order of parameter rotation can also be set arbitrarily.
Wheel display content: remaining amount, total cumulative electricity consumption, cumulative electricity consumption for the first rate, cumulative electricity consumption for the second rate, cumulative electricity consumption for the third rate, cumulative electricity consumption for the fourth rate, date, time, instrument pulse constant, and meter number.
2.4 Equipped with optocoupler isolation active passive pulse output interface, with the same pulse constant as the meter constant.
2.5 It has programming prohibition function and data reset function.
2.6 It has the function of purchasing electricity first and then using it, and automatically freezing the monthly electricity consumption rates on designated meter reading days.
2.7 Within the rated current range, the maximum operating power can be limited (by the power supply department).
2.8 Clock function
It has calendar, timing, and leap year automatic conversion functions. The energy meter has a hard clock with a daily time error of no more than 0.5 seconds.
3. Main technical indicators
Rated voltage: 3 × 220V/380V;
Calibration current: 3 × 1.5 (6) A; 3×5(20)A； 3×10(40)A；
3×15(60)A； 3×20(80)A; 3×30(100)A;
Working voltage range: 0.8Un~1.2Un;
Maximum operating voltage: 0.7Un~1.3 Un;
Frequency: 50Hz/60Hz;
Accuracy: Level 1.0;
Meter constant:

current specification	Pulse constant
3×1.5(6)A	6400imp/kwh
3×5(20)A	1600imp/kwh
3×10(40)A	800imp/kwh
3×15(60)A	800imp/kwh
3×20(80)A	400imp/kwh

Starting current: ≤ 0.4% Ib;
Stealth: equipped with anti creep logic circuit;
Insulation voltage: ≥ 2000VAC/1 minute;
LCD display: eight digit display from 0-99999.99kW. h, with auxiliary Chinese character information display;
Environmental working conditions: -20 ℃ to+55 ℃, relative humidity not exceeding 85% (temperature+25 ℃);
Power consumption:<2W;
Dimensions: 223mm (height) x 144mm (width) x 70mm (thickness);
Weight:<2Kg;
Service life:>15 years.
4. Display interface

5. External dimensions

6. Wiring diagram

Physical wiring diagram of trip coil