Jiangsu Acrel Electrical Manufacturing Co., LTD.
Jiangsu Acrel Electrical Manufacturing Co., LTD.
  • ard3 motor protect controller
  • ard3
  • ard3 motor protect controller
  • ard3

Acrel ARD3 Motor Protect Controller

ARD3 smart motor protectors can protect motors from many faults during the motor running and display the running state clearly and intuitively through LCD. The protector has RS485 remote communication interface and DC4-20mA analog output, which is convenient to form a network system together with control machines like PLC and PC.

ARD3 smart motor protectors can protect motors from many faults during the motor running and display the running state clearly and intuitively through LCD.

  • Accuracy

    U, I: Class 1.5


  • Frequency

    Range: 45-65Hz


  • Auxiliary power supply

    AC85V-265V/DC100V-350V


  • SOE event recorder

    Record 8 fault messages


  • Installation

    Main body: DIN 35mm

    Display unit: Panel mounted


  • Dimension(L*W*H)

    81.5mm*86mm*90mm


Parameters of ARD3 Motor Protect Controller


Technical parametersTechnical indicators
Protector auxiliary power supplyAC85-265V/DC100-350V, power comsumption 15VA
Rated working voltage of the motorAC380V / 660V, 50Hz / 60Hz
Rated operating current of the motor1 (0.1A-5000A)Small special current transformers
5 (0.1A-5000A)
25(6.3A-25A)
100(25A-100A)
250(63A-250A)Special current transformers
800(250A-800A)
Relay output contact capacityImpedance loadAC250V、10A
Relay output contactor,5 channels,AC 250V 6A
rated negative capacity
Switching input9 channels, opto-coupler isolation
CommunicationRS485 Modbus_RTU, Profibus_DP
EnvironmentWorking temperature-10ºC~55ºC
Storage temperature-25ºC~70ºC
Relative humidity≤95﹪No condensation, no corrosive gas
Altitude≤2000m
Pollution levelsClass 2
Protection gradeMain body IP20, split display module IP54 (installed on the cabinet panel)
Installation categoryLevel III


Video of ARD3 Motor Protect Controller


Benefits of ARD3 Motor Protect Controller


  • U, I, P, S, PF, F, EP, Leakage, PTC/NTC

  • 16 protect function

  • Start control function

  • 9 programmable DI

  • 5 programmable DO

  • Modbus-RTU or Profibus-DP communication

  • 1 DC4-20mA analog output

  • 20 fault record

  • Anti-shaking function


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  • Tel:

    +86-18761599716

  • Address:

    No.5 Dongmeng Road, Nanzha Street, Jiangyin City, Jiangsu Province, China.