1. Overview:

The AT28E-DF1 single-phase multi rate active energy meter is a new generation of intelligent energy meter developed and produced using advanced microelectronics technology and SMT process. The meter realizes time-sharing measurement, with four different rates of peak, valley, flat and sharp measurement. Users do not need to set it for direct use, and can customize the time period for different regions. The peak period from July to September is set as the peak period, with large capacity lithium batteries, high-precision clocks, and high-precision energy measurement.

All performance indicators of the product comply with GB/T 17215.321-2008 "Level 1 and Level 2 Static AC Active Energy Meters" and GB/T 15284-2002 "Special Requirements for Multiple Rate (Time of Use) Energy Meters" DL/T 645-1997 。 All products are self-developed and produced by our company, supporting customized functions. Please contact our company for details.

2. Main functions:

◆ Four rates (peak, valley, flat, peak) can be set for 12 time periods, crossing zero points, and the time period status will not be affected by power outages, power transmission, or other harsh working environments;

Electric energy is measured and stored separately based on peak, valley, flat, peak, and total electricity consumption;

Programming and meter reading operations can be completed through infrared and RS-485 communication interfaces;

The electricity meter adopts LCD display mode, which can display parameters such as time and power, with a display time of 5 seconds for each item;

After power failure, all stored data will not be lost and can be maintained for more than 10 years. Repeated power outages and power ups will not result in any changes to the battery level or pulse count;

◆ It has a clock detection output port function, which facilitates regular detection of clock accuracy.

3. Main technical parameters:

◆ Calibration voltage: 220V 50Hz

Calibration current: 2.5 (10) A, 5 (20) A, 10 (40) A, 20 (80) A

Accuracy: Level 1.0

Daily timing error: ≤ 0.5/s/d (25 ℃± 2 ℃)

◆ Service life: ≥ 10 years

◆ Battery capacity: 1200mAh, 3.6V lithium battery, battery life>10 years

Infrared communication distance: 5m (light radiation angle less than 15 degrees)

RS485 bus terminals: 256, communication baud rate: 2400bps~9600bps

◆ Starting current: ≤ 0.004Ib

◆ Stealth: There is an anti creep logic circuit.

4. Wiring diagram:

5. Time period setting case:

◆ Division of industrial electricity peak and valley periods in Anhui Province

Peak 8 hours: 9:00-12:00, 17:00-22:00

7-hour flat section: 8:00-9:00,12:00-17:00,22:00-23:00

Low valley 9 hours: 23:00-8:00 the next day

Store peak values separately from July to September

◆ Division of peak and valley periods for residential electricity consumption in Anhui Province

Flat section 14 hours: 8:00-22:00

Low valley 10 hours: 22:00-8:00 the next day