1.Product features:
The AT28DP-3X-H three-phase centralized intelligent energy meter is a fully electronic intelligent three-phase electricity meter, a high-tech product produced using microelectronics technology and SMT surface welding process. Modular design, with one meter capable of measuring the electricity consumption of 12 or fewer households simultaneously. All products are self-developed and produced by our company, supporting customized functions. Please contact our company for details.
2.Main technical parameters:
2.1 Accuracy: Level 1.0;
2.2 Calibration current: Three phase 3x1.5 (6) A, 3x2.5 (10) A, 3x5 (20) A,
3x10(40A), 3x15(60)A；
2.3 Nominal voltage: Three phase 3x220V/380V;
2.4 Whole machine power consumption: ≤ 4W；
2.5 Operating voltage range: 75% Un~120% Un;
2.6 Starting current: 0.4% Ib for direct connection type, 0.2% Ib for transformer connection type;
2.7 Power frequency to ground withstand voltage value: 2kV/1min；
2.8 Operating temperature and humidity range: -25~55 ℃,<90% (no condensation);
The power module adopts a three-phase circuit for power supply, which can accurately measure the electricity consumption even if the line is out of phase.
2.10 The electricity meter is equipped with a human-machine interface, which can achieve on-site button operation for meter reading and remote bus network meter reading;
2.11 RS485 communication interface, communication protocol can be selected as DLT645 or Modbus RTU;
2.12 Communication baud rate adjustment range: 1200-19200bps;
2.13 Passive photoelectric pulse interface with on-site verification of the accuracy of each meter;
2.14 Can withstand "electrostatic discharge immunity", "high-frequency electromagnetic field immunity", "electrical fast transient pulse group immunity" and "surge immunity" tests, during which the electric energy meter is not disturbed. After the experiment, the electric energy meter can measure correctly and the communication part can work normally. The battery level read through communication should be consistent with the displayed value (allowing a difference of ± 1 word);
2.15 If the primary circuit current is less than 63A, a direct connection method is used. If the primary circuit current is greater than 63A, it is connected to the electricity meter through a current transformer;
2.16 When selecting a centralized intelligent energy meter with prepaid function, the direct access type meter can achieve direct power-off, and a set of auxiliary contacts in the transformer type can control the trip coil or contactor;
2.17 Smart energy meters with prepayment function can achieve functions such as buying electricity first and then using it, automatic power-off without charge, power limitation, remote control of power outage, and remaining power alarm.
3. Dimensions:(Thickness 110mm)
There is usually a 100mm space left on the right side of the smart energy meter from the right line of the distribution box, which is convenient for users to connect communication lines. When the current level is 60A, the number of households in the corresponding box will decrease accordingly.


4.Product Selection
AT28DP-3X-H (□ W/3 × □ A), for example: 3 households/3 × 10 (40) A is represented as AT28DP-3X-H (3W/3 × 10 (40) A)

5. Wiring diagram




Note: The current transformer S2 is grounded, and K1, K1 'to Kn, Kn' are auxiliary contacts with prepayment function. The normally closed contact controls the trip coil, and the normally open contact controls the contactor (specified when ordering).