The DDSF121 series single-phase electronic multi rate electricity meter is one of the successfully developed multi rate electricity meter series products based on GB/T15284-2002 "Special Requirements for Multi rate (Time of use) Electricity Meters". It consists of a static energy metering unit and a multi rate data processing unit, using a liquid crystal display with infrared and RS485 communication functions. This product utilizes advanced software design methods, high-performance hardware circuits, and advanced SMT production processes. Its technology is advanced, its functions are complete, and it has the characteristics of high measurement accuracy, good long-term stability, strong overload capacity, and good reliability. It is an ideal preferred product for power supply departments to carry out time-sharing energy metering.

This product is suitable for point-to-point or one master multi slave data exchange through RS485 communication network or infrared handheld devices. The physical layer interface, communication link, and measurement performance comply with the technical specifications of GB/T17215-2002 and the technical requirements of standards such as DL/T645-1997 "Multi functional Energy Meter Communication Protocol".

Single phase electronic multi rate energy meter (LCD)

Technical Parameter

Electrical parameters

Climate conditions and temperature range

Electrical parameters

1. Single phase electronic multi rate energy meter (LCD) has the function of measuring positive and negative active energy. Negative energy is accumulated based on positive energy, but it is stored separately. Whether it is communication, time period switching, or switching between positive and negative active energy, it will not affect the accuracy of pulse accumulation. The electricity meter has a reverse active energy indicator light.

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

3. Electric energy is measured and stored separately based on total, peak, off peak, off peak, and off peak electricity levels.

4. A single-phase electronic multi rate energy meter (LCD) can store frozen data for the first 12 months, including total, peak, flat, and valley. The freezing date for electric energy data is any time between the 1st and 28th of each month, with the default date being 0:00 on the 1st of each month.

5. The battery adopts a needle welded backup green and environmentally friendly lithium battery. After power failure, the backup lithium battery can continuously provide the built-in clock with normal operation for at least 10 years.

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

   The electricity meter is equipped with a high-power relay that can control the power supply to the meter load through infrared or RS-485 communication. The electricity meter has a relay power-off indicator light.

7. A single-phase electronic multi rate energy meter (LCD) has an active energy pulse indicator light and an energy pulse output interface.

8. Single phase electronic multi rate energy meter (LCD) adopts LCD display mode, which can display parameters such as time, date, and power, and allows setting of cycle display time and content (please refer to the appendix for specific information). During a power outage, the displayed number of digits for electrical energy is a 6-digit integer and a 2-digit decimal; The normal time display shows a 7-digit integer and a 1-digit decimal. Each display time is 5 seconds

9. Single phase electronic multi rate energy meters (LCD) use hardware clock circuits. The built-in clock has calendar timing and automatic switching function for leap years.

10. After a power outage, 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.

11. Event recording function: Starting time of current reversal; The latest programming time, programming frequency, reset frequency, etc.

12. It has power outage display function.

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