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Multifunctional Power Instrument LCD from China Suppliers and Factory for Electrical Monitoring

Introducing our advanced multifunctional power instrument, designed specifically to fulfill the electrical monitoring needs of power distribution systems. This high-performance device, developed by leading suppliers in China, measures essential electrical parameters including three-phase voltage, three-phase current, active power, reactive power, frequency, power factor, and four-quadrant energy, The long-lasting LCD clearly displays all critical measurement data and operational information of the network system. Equipped with an RS485 communication interface utilizing the MODBUS RTU protocol, this instrument ensures reliable data exchange. Additionally, it features four programmable buttons on the user-friendly panel, allowing for effortless control and customizable parameter settings, Choose our factory-manufactured power instrument for precision and reliability in electrical monitoring
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    Product Details

    Product Overview

    There are several different types of extended function modules to choose from: The four-channel analog quantity (0~20mA/4~20mA) output can transmit electrical quantity, while the four-channel switching value input and output can monitor and control local or long-range switch signals ("remote signaling" and "remote control"). The device may immediately replace a typical power transmitter, a measuring indication instrument, an electric energy measuring instrument, and any associated auxiliary units. With modular structural design, customers may select the most cost-effective functional configuration based on their specific requirements.

    It is frequently utilized in applications such as energy management systems, supply and distribution network automation, district power control, and entire switchgear sets. It has the benefit of easy installation and maintenance. Sample wiring, small quantity, programmable input parameters, and networkable with various PLCs, industry control computer communications software.

    💡

    Key Advantage: Modular structural design allows customers to select the most cost-effective functional configuration based on their specific requirements — replacing power transmitters, measuring instruments, and electric energy meters all in one device.

    ⚡

    4-Channel Analog Output
    0~20mA / 4~20mA

    🔀

    Switching Value I/O
    Remote Signaling & Control

    🔌

    PLC & Network Compatible
    RS485 / MODBUS RTU

    🏭

    Energy Management Ready
    Automation & Switchgear

    Technical Parameters

    Technical Parameters

    Index

    Input

    Network

    Three-phase three-wire, three-phase four-wire

    Voltage

    Rated value

    AC 0~500V

    Over load

    Consistent 1.2 times instantaneous, 2 times / 30s

    Consumption

    <0.5VA (each phase)

    Impedance

    >500kΩ

    Current

    Rated value

    AC 1A, 5A

    Over load

    Consistent: 1.2 times instantaneous, 2 times / 1s

    Impedance

    <2mΩ

    Frequency

    45–65Hz

    Output

    Electric Energy

    Output mode

    Two-channel open-collector, optical coupling pulse output

    Pulse constant

    Active: 3200 imp/kWh
    Reactive: 3200 imp/kvarh

    Start

    On the condition of rated voltage, reference frequency and cos φ=1.0, when load operational current is 0.01In, it can start and measure the electric energy continuously.

    Creep

    When exceeding 115% rated voltage and no current in the current circuitry, the instrument is with no electric energy accumulation and pulse output.

    Output

    Communication

    Output mode

    RS485

    Protocol

    MODBUS_RTU

    Baud rate

    1200, 2400, 4800, 9600

    Analog Quantity

    Channel quantity

    4 channels

    Output mode

    0–20mA, 4–20mA

    Load ability

    <400Ω

    Switching Value

    Channel quantity

    4 channels

    Output mode

    Normally open relay contact output

    Contact capability

    AC 240V / 2A

    Switching value input

    Four channel dry contact input modes

    Display mode

    LCD (Blue back lighting)

    Measuring Accuracy

    Voltage, current

    ± (0.5%FS + one digit)

    Active power, reactive power

    ± (0.5%FS + one digit)

    Frequency

    ± 0.1Hz

    Power factor

    ± 0.01PF

    Active energy

    ± 0.5% (only for reference, not for meterage)

    Reactive energy

    ± 1.0% (only for reference, not for meterage)

    Source

    Scope

    AC 220V, 50/60Hz

    Consumption

    <5VA

    Safety

    Withstand Voltage

    Input and source

    >2kV 50Hz / 1min

    Input and output

    >1kV 50Hz / 1min

    Output and source

    >2kV 50Hz / 1min

    Insulating resistance

    Any two of input, output, source, casing >20MΩ

    Environment

    Temperature

    Operation: -10 ~ 50°C

    Storage: -25 ~ 70°C

    Humidity

    ≤85%RH, free of wet and corrosive gas

    Elevation

    ≤3000m

    Function & Shape / Model

    Measure & Display

    Shape Code

    Selected Additional Functions

    Phase Voltage V

    Line Voltage

    Current

    Frequency

    Power Factor

    Active Power

    Total Reactive Power

    Total Apparent Power

    Each Phase Power Factor

     

    Each Phase

    Apparent Power

    Active Energy

    Reactive Energy

    ⑨ 96×96

    ⑧ 80×80

    ⑦ 72×72

    Communication RS485

    4-Ch Switch Outputs

    4-Ch Switch Input

    4-Ch Analog Output

    Harmonic

    SFS-□S3-3E

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    Frequently Asked Questions (FAQ)

    ❓ What types of extended function modules are available for this power meter?
    The device supports several extended function modules, including a four-channel analog quantity output (0~20mA / 4~20mA) for transmitting electrical quantities, four-channel switching value input for remote signaling, and four-channel switching value output for remote control. Additional options include RS485 communication, 4-channel analog output (4AO), and harmonic measurement modules.
    ❓ What communication protocols does this power meter support?
    The device supports RS485 communication using the MODBUS_RTU protocol. The baud rate is configurable at 1200, 2400, 4800, or 9600 bps, making it compatible with various PLCs and industrial control computer communications software.
    ❓ What is the measuring accuracy of this power meter?
    The measuring accuracy varies by parameter: Voltage and current accuracy is ±(0.5%FS + one digit); Active and reactive power accuracy is ±(0.5%FS + one digit); Frequency accuracy is ±0.1Hz; Power factor accuracy is ±0.01PF; Active energy accuracy is ±0.5% (reference only); and Reactive energy accuracy is ±1.0% (reference only).
    ❓ What are the input voltage and current specifications?
    The device accepts AC 0~500V input voltage with a rated current of AC 1A or 5A. It supports both three-phase three-wire and three-phase four-wire network configurations, and operates over a frequency range of 45–65Hz. The power supply requires AC 220V at 50/60Hz with a consumption of less than 5VA.
    ❓ In what applications is this power meter commonly used?
    This power meter is widely used in energy management systems, supply and distribution network automation, district power control, and complete switchgear sets. Its modular design, easy installation, and network compatibility make it ideal for industrial and commercial electrical monitoring environments.
    ❓ What are the environmental operating conditions for this device?
    The device is designed to operate in temperatures from -10°C to 50°C, with a storage temperature range of -25°C to 70°C. Humidity must be ≤85%RH with no wet or corrosive gases present. The device is suitable for use at elevations up to 3000m above sea level.