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ISO RS485 communication Smart Motor Protector / Motor Protection Device

Minimum Order Quantity : 1 Price : USD+100-260+pcs
Packaging Details : 48*45.5*20 Delivery Time : 5-8 work days
Payment Terms : L/C, T/T Supply Ability : 2000000+pcs+per year
Place of Origin: YES Brand Name: Acrel
Certification: ISO/CE Model Number: ARD2F-25

Detail Information

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RS485 Smart Motor Protector


RS485 Motor Protection Device


ISO Smart Motor Protector

Product Description


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.



● Measurement functions are divided into basic measurement (current parameter) and co-selection measurement (voltage, power, phase sequence, residual current (leakage current);

● Start timeout, overload, stall, block, underload, phase failure, unbalance, residual current (ground/leakage), temperature, external fault, phase sequence, overvoltage, undervoltage, underpower, overpower, tE time Motor comprehensive protection function;

● 9-channels DI passive dry node input, signal power supply with built-in DC24V power supply;

● 5-channels DO output, which can meet the direct start, star-delta start, autotransformer start, soft start and other starting modes. Real-time remote control "start/stop" operation of the remote master station can be realized through the communication bus;

● It has standard RS485 communication interface and adopts Modbus-RTU and Profibus-DP communication protocol to ensure fast and reliable communication of the host computer;

● It has a DC4-20mA analog output interface and is directly connected to the DCS system to monitor the field devices.


Technical Parameters


Technical data of motor protector ARD2F-25
Auxiliary power supply of protector AC85V~265V/DC100V~350V, power consumption ≤7VA
Rated working voltage of motor AC380V/AC660V, 50H/60Hz
Rated working current of motor 1A(0.1 ~9999) Small specific current transformer
  5A(0.1 ~9999)  
  250A(63A-250A) Specific current transformer
Relay output contactor, rated load capacity 4-way,AC250V, 3A, DC30V, 3A
Switching input 2-way, optical isolation
Communication RS485 Modbus
Volume of SOE event recorder 8 events
Environment Working temperature -10℃-55℃
  Storage temperature -20℃-65℃
  Relative humidity 5%-95%, no dew
  Altitude ≤2000m
Class of pollution 2
Protection level IP20


Rated current of motor protector(A) current ratio setting Transformer primary side turns Setting current Is range(A) Motor Power(kW)
1 able to set 5 0.1~9999 0.12~440
5   1 0.1~9999 0.12~440
1.6 unable to set 1 0.4~1.6 0.12~0.55
6.3   1 1.6~6.3 0.75~2.2
25   1 6.3~25 3~11
100   1 25~100 15~45
250   1 63~250 55~132
800   1 250~800 160~440



ISO RS485 communication Smart Motor Protector / Motor Protection Device 0

ISO RS485 communication Smart Motor Protector / Motor Protection Device 1



ISO RS485 communication Smart Motor Protector / Motor Protection Device 2


Typical connection

ISO RS485 communication Smart Motor Protector / Motor Protection Device 3


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