RF Module Lora Smart Meter Single Phase For Measuring AC Voltage / Current

RF-Module Single Phase Lora Smart Meter for AMR/AMI System DLMS/COSEM Protocol

Working Principle

Measured AC voltage and current have been sampled and transported to professional metering chip, after digital processing, they have been changed to the pulse signal, which in direct proportion to active power, and then sent to microprocessor. Microprocessor would accumulate the pulse signal according to the tariff, then get total power and tariff power and put them in register. At the same time, the microprocessor finishes the function of display and changeover with external messages. Please take attention to the Figure 1

Technical Features

• Take advanced professional integrated circuit and SMT, hot air reflow soldering and wave soldering as technical design, which can make sure of reliable quality.
• Take three units isolated power for metering unit, data processing unit and communication interface unit. All the output signals are handled by optoelectronic isolation, which can increase Electromagnetic Compatibility, and also confirm the stable working for metering unit, that will not influence by communication interface.
• Wide voltage range from 154V to 265V, and won’t be damaged even on 418V, which upgrade its environmental suitability.
• Build in “Watch Dog” design for microprocessor, to promise for the well working of CPU. Triple backup for metering data. The data are safe even in harsh conditions.
• Fully sealed dustproof and waterproof design, material of cover has excellent flame retardant and anti-corrosion, anti-aging properties.
• Build in clock circuit with temperature compensation function, the function can also work when power off and get power source from battery, to make sure of the high processing precision of clock.
• With standard interface of carrier communication module, the meter can work with different carrier modules.
• With protection card interface for IC card, and also support for CPU card.

• Specification

Remarks: Special pulse constant can be customized as inquire.

Mainly Parameters

Reference Voltage: 220V

Reference Current: 1.5A, 5A, 10A, 15A

Reference Frequency: 50Hz

Intrinsic Error: Meet with IEC 62053-21

Start Current: ≤0.004Ib (Direct Mode)

Defluction: When 115% reference voltage and no current in current circuit, no more than 1 pulse can be made by meter.

Consumption: Voltage Circuit Consumption(Out of Communication Status) ≤1.5W, 10VA

Voltage Circuit Consumption(Under Communication Status) ≤3.0W, 12VA

Current Circuit Consumption ≤1VA(Ib)

Working Temperature: -25℃～60℃

Maximum Working Temperature: : -40℃～70℃

Maximum Storage and Transportation Temperature: -40℃～70℃

Relative Humidity: Annual Average＜75%

Month Average 95%

Occasional 85%

Air Pressure: 63.0kPa～106.0kPa (Under 4000m)

Normal Working Pressure: 0.9Un～1.1Un

External Working Pressure: 0.8Un～1.15Un

Maximum Working Pressure: 0.0Un～1.15Un

Clock Accuracy: ≤0.5S/D (Reference Temperature 23℃)

Capacity of Li-Ion Battery: ≥1.2Ah, the working time since power off≥ 5 years.

Data Storage Period ≥ 10 years

Life Time ≥ 10 years

Dimension: 112*160*71 mm

Weight: 0.8kg

Pulse Width: 80±20mS, Typical 80mS

Communication Rate for Optical: 1200bps

Communication Rate for RS485: 2400bps (Typical Value)

600bps, 1200bps, 2400bps, 4800bps, 9600bps (Can be set)

About Company:

Wuhan Radarking Electronics Corp. is a modern share enterprises which focusing on the smart Internet of things(IOT) /smart grid energy consumption sensor/intelligent electric safety integrated solution. It established in 2002(former name: Wuhan Radarking Co.,Ltd.)and went public on January 27, 2015 with the stock abbreviation RADARKING and stock number 831722. It owns the independent R&D center and factory which is the key recommended high-tech enterprises in Wuhan city.

It mainly R&D, manufacture and sell the integrated solution of smart Internet of things(IOT) energy consumption sensor/smart grid energy consumption sensor/energy consumption information acquisition and transmission(Collector, Concentrator, Communication Module), smart electric meter, smart water meter, “RDK” energy Internet of Things(IOT) intelligent energy safety integrated solution, digital campus energy consumption acquisition(meter reading) charging management integrated solution, 4-in-1 Meter energy consumption acquisition(meter reading) charging management integrated solution, 4-in-1 Meter/All-in-One Card cloud computing total charging management integrated solution, energy consumption monitoring and analysis integrated solution, mobile phone APP(Energy Consumption, Fast E Top Up).