1. Product Features

Equipped with RS485 communication interface, it can choose Modbus communication protocol, DLT645-1997 and DLT645-2007 communication protocols; Both active and reactive electrical energy can be measured for the 2nd to 21st harmonic content; This intelligent energy meter can also be used as a three-phase multifunctional energy meter, with advantages such as small size, high accuracy, good reliability, and easy installation;

AT28DP-3H-C contains a large capacity magnetic holding relay, which has functions such as remote control of power outage, timed power outage, prepaid and remote card purchase of electricity; Electric meters with current levels of 80A and below can automatically cut off power without any charge, and automatically transmit power after purchasing electricity. Unlike the external control of the trip coil, which can only achieve automatic power-off and cannot achieve automatic power transmission, there are drawbacks; Power off function can be achieved through external control trip coils or contactors above 80A.

Remote query of parameters such as electricity consumption, purchased electricity, and remaining electricity. 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 0.5;

2.2 Calibration current: 3 × 1.5 (6) A, 3 × 2.5 (10) A, 3 × 5 (20) A, 3 × 10 (40) A,

3×15(60)A, 3×20(80)A;

Nominal voltage: 3 × 220V/380V;

2.3 Power consumption: ≤ 1W; Display mode: LCD display;

2.4 Operating voltage range: 75% Un~120% Un;

2.5 Starting current: 0.2% Ib for transformer connected type and 0.4% Ib for direct connected type;

2.6 Power frequency to ground withstand voltage value: 2kV/1min;

2.7 Operating temperature and humidity range: -25~55 ℃,<90% (no condensation);

2.8 Passive photoelectric pulse interface with on-site verification of meter accuracy;

2.9 The product shall comply with GB/T 17215.321-2008 and JJG596-2012 Verification Regulations for Electronic Energy Meters;

2.10 When selecting three-phase multifunction, the "▲" and "▼" buttons can also be used to view electrical parameters such as three-phase current, three-phase voltage, active power, reactive power, apparent power, power factor, etc. (optional functions);

2.11 Connect a current of 80A or below directly, and connect a current transformer for currents above 80A;

2.12 The cross-sectional area of the primary line passing through the electricity meter is ≤ 35mm2;

2.13 For electric meters with 80A and below, a large capacity magnetic holding relay is built-in to achieve the prepaid function of buying electricity before using it, and automatic power-off without charge; For electric meters larger than 80A, a set of normally closed and normally open passive contacts are built in to control the trip coil or contactor separately, achieving a prepaid function of automatic power-off without charge.

3. Product selection

AT28DP-3H Three phase Rail type Intelligent Energy Meter

AT28DP-3H-T three-phase rail type intelligent energy meter (including communication interface)

AT28DP-3H-C three-phase rail type intelligent energy meter (including communication interface and prepaid)

4. External dimensions

5. Wiring diagram

Attention: When the current specification is 3 * 1.5 (6) A, it is necessary to specify whether it is a transformer connected or directly connected type.