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Have you ever seen such a small size and big intelligence of three-phase smart meter?

Have you ever seen such a small size and big intelligence of three-phase smart meter?

With the advent of informationization and digital Internet of things era, data-based analysis and refined management have become more and more demanding in the electric power industry and energy consumption monitoring and management field. With the power industry, electricity market and power users' demand for safe electricity consumption, intelligent electricity consumption, and scientific electricity consumption rising, there are more functional requirements for power meters, and the flexibility and reliability of communication methods are higher. The number of power meter installations needs to be refined, which inevitably involves the project cost budget; in addition, most of them are retrofitting projects with limited installation space and need to have a more compact size to adapt to the installation environment. At present, the multi-functional meters and smart meters on the market are basically suspended meters, which are large in size and high in price; the limitations of use cannot well meet the market demand. Through the market and customer communication research, Yongtelong tapped the potential demand of customer applications, and launched a set of intelligent sub-meter in response to the pain points of customers combined with its own advantages of rail meter design and development, production and manufacturing.

The up link of the smart meter is 4G (CAT1) communication, and the down link reads from the meter through RS485 with concentrator function; the sub-meter is RS485 communication. Three-phase smart meter specific parameter functions.

1、Voltage AC 3*220/380V±20%; 0.25~5(80)A

2、The metering accuracy is 1.0 grade for active power and 2.0 grade for reactive power; built-in 100A relay as load control.

3、Power demand, apparent power demand, daily maximum demand, monthly maximum demand, demand interval 5-60 minutes can be set, slip time 1-5 minutes can be set.

4、Freeze power: timed freeze, instantaneous freeze, daily power, monthly power

5、Rates: 4 rates, 8 time slots

6、Event alarm: loss of voltage, over-voltage, phase failure, abnormal frequency, over-current, overload, power failure record, voltage imbalance, current imbalance, load switch misoperation

7、Communication protocol DLT645-2007/Modbus dual protocol compatible; 4G communication (CAT1) supports MQTT

8、Designed to comply with IEC62052-11 2020, IEC62053-21 2020; GB/T 17215-211 2021, GB/T 17215-321 2021 standards, meeting MID, CPA certification.

9、Rail-mounted, small size, easy installation

This series of three-phase smart meter products in the project design carefully analyze the market demand around the concept of small size, ease of installation, high cost performance, in the overall application framework, specific chip program selection, structure of the installation method have been fully reflected. The adoption of the smart and sub meter GPRS smart meter and RS485 smart meter matching mode, can be flexibly applied to a variety of environments and eliminate the use of concentrator, reducing the application cost. The use of rail mounting reduces the size for easy installation, and the volume reduction also reduces the material cost of the case. The chip selection is determined by comparing and testing three solutions and combining them with the cost, and the advantageous solution is adopted under the premise of ensuring product performance and quality.