ARD3 motor protector
- Jiangsu Acrel Electrical Manufacturing Co.,LTD.

PRODUCTS

  • 1、Overview

    ARD series intelligent motor protector (hereinafter referred to as protector) can perform various conditions such as start timeout, overload, phase failure, unbalance, underload, ground/leakage, blockage, short circuit and external fault during motor operation. Protection, and SOE fault event recording function, convenient for on-site maintenance personnel to find the cause of the fault. Suitable for coal, petrochemical, smelting, electric power, ships, and civil construction. The protector has RS485 remote communication interface, DC 4 ~ 20mA analog output, and PLC, PC and other control machines form a network system. Remote monitoring of motor operation.


    2、Model Description

    l ARD3 Intelligent motor protector

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    Table 9Starting method

    Starting methodCode
    Manual mode1)A
    Two-step mode2)H
    Two-speed startF
    Protection methodJ

    Note:

    1) Manual mode: The protector participates in the control. When the start mode is direct start (full pressure start) and the two-way start, the protector is set to manual mode.

    2) Two-step mode: When the protector participates in the control, when the start mode is star/delta start (two relays) and autotransformer (two relays), the protector is set to two-step mode.

    Table 10 Additional features

    Additional features (optional)代号
    Communication function, the protocol is MODBUS_RTUC
    2-way communication function, the protocol is MODBUS_RTU2C
    Residual current protection (leakage)L
    Voltage function (power, power factor) U
    Temperature protectionT
    4~20mA analog outputM
    tE time protectiontE
    Electrical energy (including voltage function)EP
    Loss of pressure (anti-shake)SU(Including voltage and fault recording functions)
    broken recordSR

    Note: 1. When the additional function is equipped with leakage protection L, it is necessary to purchase zero-sequence transformers with different apertures according to the actual current.

    2. For customers without display requirements, a 90L display unit must be ordered in a batch of orders for debugging purposes;

    3. When the additional function is equipped with leakage protection L, it is necessary to purchase zero-sequence transformers with different apertures according to the actual current.

    4. additional features optional 2C and T two.




  • 3、Technical indicators

    l ARD2(L)、ARD2F、ARD3 Main Specifications

    Technical ParametersTechnical indicators
    ARD2(L)ARD2FARD3
    Auxiliary powerVoltageAC85V~265V/DC100V~350V
    Power consumption≤7VA≤15VA
    Rated operating voltageAC380V/AC660V,50Hz/60Hz
    Rated operating current1A(0.1~999.9)
    5A(0.1~999.9)
    1.6A(0.4A~1.6A)
    6.3A(1.6A~6.3A)
    25A(6.3A~25A)
    100A(25A~100A)
    250A(63A~250A)
    800A(250A~800A)
    Relay output contact capacityAC250V, 3A;DC30V, 3AAC250V, 6A
    Switch input29
    Surroundings Operating temperature:-10ºC~55ºC
    Storage temperature:-20ºC~65ºC
    Relative humidity:5﹪~95﹪不结露
    Altitude:≤ 2000m
    Pollution level3
    Protection levelIP20Main body IP20, display unit IP54(when installed in the cabinet panel)
    Installation categoryLevel III

     

    l ARD3T Main Specifications

    Technical ParametersTechnical indicators
    Auxiliary power AC/DC 110 / 220V,power consumption≤15VA
    Rated operating voltage of the motorAC 380V / 660V,50Hz / 60Hz
    Motor rated operating current1.6(0.40A-2.00A)Measuring with the measurement module
    6.3(1.6A-6.3A)
    25(6.3A-25A)
    100(25A-100A)
    250(63A-250A)Use external current transformer + measurement module
    800(250A-800A)
    Leakage50mA-1AUsing measurement module + leakage current transformer
    3A-30A
    Relay output contact capacityResistive loadAC250V、6A;DC24V、6A
    Inductive loadAC250V、2A;DC24V、2A
    Main body switch input and output4DI、4DO,DI can be a dry contact or a wet contact
    Switch module4DI、3DO,DI can be a dry contact or a wet contact
    Temperature moduleExternal sensor type:PT100、PT1000、Cu50、PTC、NTCNumber of sensor channels: 3 channelsSensor corresponding measurement range:PT100/PT1000:-50°C~+500°CCu50:-50°C~+150°CPTC/NTC:100Ω~30kΩ
    Analog moduleCan be realized: 2 channels 4 ~ 20mA input measurement, 2 channels 4 ~ 20mA transmission output4~20mA input measurement accuracy ±0.5%4~20mA output maximum load capacity is ≤500Ω
    Subject communicationRS485:Modbus-RTU
    Communication moduleRS485:Double Modbus-RTU、Profibus
    Surroundings Operating temperature-10ºC~55ºC
    Storage temperature-25ºC~65ºC
    Relative humidity≤95﹪ No condensation, no corrosive gases
    altitude≤2000m
    Pollution levelLevel 3
    Protection levelMain body IP20, split display module IP44 (installed on the cabinet)
    Installation categoryLevel III

     

    4、Product Features

    Low voltage motor protection quick selection table

    Description: “√” means standard“■” means optional

                                            ModelFunctionARD2ARD2LARD2FARD3ARD3T
    ApplicationLow voltage 0.4kv-1.14kv motor protection
    Protective functionStart timeout
    overload
    Underload
    Short circuit
    Blocking
    Stall
    unbalanced
    Feedback timeout



    External fault
    Module structure failure



    Internal fault



    Overpressure

    Undervoltage

    Phase failure
    Phase sequence

    Over power


    Underpower

    tE time

    Body temperature protection

    Main body temperature sensor failure



    Module temperature protection



    Module temperature sensor failure



    Call the police
    Loss of pressure (anti-shake)

    4-20mA input protection



    Residual current(choose one)Ground
    Leakage
    Communication functionModbus_RTU
    Double Modbus_RTU


    Switch input2


    6




    8



    4-way standard4-way optional
    9


    Relay output44-way standard4-way optional


    5

    4-way standard4-way optional
    6




    7



    4-way standard4-way optional
    Start control

    4-20mA analog output
    Record 8 records

    20 records


    Operational information record

    Logic functionTimer



    counter



    Truth table



    Parameter measurementThree-phase current
    Leakage current

    Three-phase voltage

    Power, power factor

    Frequency 
    Electric energy


    PTC/NTC

    4-20mA input



    Temperature measurement module



    Liquid level




    Interface displayLED digital tube display



    LCD liquid crystal display
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    Front View                              Left view

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    Top view

    4.2 Installation dimension of protector display unit


    Installation dimensions of transformer

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    Current Transformer (0.1A-100A)

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    Current Transformer (63A-250A)

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    Current Transformer (250A-800A)

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    Zero sequence current transformer

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