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    Current Monitoring Relay, 2-20A Adjustable, AC/DC24V-240V

    Current Monitoring Relay, suitable for power sources ranging from AC 24V to 240V and DC 24V to 240V, making it applicable for diverse industrial and commercial applications. With an adjustable range from 2A to 20A, this current monitoring relay caters to a wide array of applications, ensuring stable and dependable current monitoring for both AC and DC power sources.
    SKU: ATO-MR-GRI805
    30-day Returns
    Free Shipping
    Delivery date: 6-12 days

    ATO Current Monitoring Relay, featuring adjustable settings ranging from 2A to 20A, is purpose-built for monitoring heating systems in rail-switches, heating cables, and single-phase motor power consumption. The current monitoring relay accurately indicates current flow, offering essential insights for system management and operation. With its adaptable settings and compatibility with AC and DC power sources ranging from 24V to 240V, it caters to diverse industrial applications.


    • Through center design, no need to disconnect the current circuit, through center installation is convenient to use.
    • Over/under current monitoring mode can be set by jumper.
    • With AC and Dc universal testing specifications optional.
    • Isolation current transformer is adopted, and external current transformer can be connected to expand the monitoring current range.
    • Current monitoring relay universal power supply AC/DC 24V-240V.
    • Relay status is indicated by LED.
    • 1-MODULE, DIN rail mounting.


    Model ATO-GRI8-05A ATO-GRI8-05B
    Function AC measurement AC/DC measurement
    Supply terminals A1-A2
    Rated supply voltage AC/DC 24V-240V
    Rated supply frequency 50/60Hz
    Burden max 25VA
    Supply voltage tolerance -15%; +10%
    Current range 2A-20A
    Current frequency AC 50Hz AC 50Hz, DC
    Setting accuracy potentiometer
    Supply indication green LED
    Setting accuracy 10%
    Hysteresis 5%
    Output 1×SPDT
    Current rating 10A/AC1
    Switching voltage 250VAC/24VDC
    Min.breaking capacity DC 500mW
    Output indication red LED
    Mechanical life 1×107
    Electrical life (AC1) 1×105
    Operating temperature -20℃ to +55℃
    Storage temperature -35℃ to +75℃
    Mounting/DIN rail Din rail EN/IEC 60715
    Protection degree IP20
    Operating altitude ≤2000m
    Operating position any
    Overvoltage cathegory Ⅲ.
    Pollution degree 2
    Max.cable size (mm2) 1×2.5mm2 or 2×1.5mm2 0.8N·m
    Dimensions 90mm×18mm×64mm
    Weight 75g
    Standards GB/T 14048.5, EN 60255-1

    Wiring Diagram

    Current monitoring relay wiring program

    Panel Diagram

    Current monitoring relay panel program

    Functions Diagram

    Current monitoring relay function program

    Dimensions (mm)

    Current monitoring relay dimension aCurrent monitoring relay dimension-b

    Tips: The advantages of the Current Monitoring Relay

    • Precision monitoring: Utilizing advanced monitoring technology, it accurately detects changes in circuit current, ensuring safe equipment operation.
    • Multi-functionality: Apart from current monitoring, it also features overload protection, short-circuit protection, and other safety functions, effectively safeguarding circuits and equipment.
    • High reliability: Manufactured with high-quality materials and advanced processes, it ensures stability and durability for long-term industrial use.
    • Ease of installation and operation: Designed for simplicity, it is easy to install and use, even for non-professionals.
    • Cost savings: Providing an efficient current monitoring solution, it reduces the risk of circuit faults and equipment damage, thereby saving on maintenance and replacement costs.
    • Increased efficiency: By monitoring current changes in real-time, it enables prompt detection of issues and measures to improve system efficiency and stability.
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