ARD3M Series Smart Motor Protector

Type: Smart Motor Protector


Function:Phase loss,overload,locked rotor,blockage,three phase unbalance protection,etc.


Measurement:Active kWh (positive and negative),quadrant reactive power energy.


Electrical measurement: U、I、 P、Q、S、PF、F、THDv、Harmonic on 2nd-31st,etc


Communication:RS485, WIFI


Protocol:Modbus-Rtu,MQTT


InstallationSeparated type or integrated

  • 428 Manual of ARD3M V1.2.pdf 428 Manual of ARD3M V1.2.pdf
  • Details
  • Comparison with Well-known Brands




The ARD3M series intelligent motor protector (hereinafter referred to as the protector) is suitable for low-voltage motor circuits with rated voltage up to 660V and integrates protection,measurement, control,communication, operation and maintenance.


The power module supports the power range of AC/DC100-415V.


Support fundamental wave and full wave power parameter measurement (U, I, P, Q, S, PF, F, EP, EQ), voltage and current unevenness Balance, voltage, current positive sequence, negative sequence, zero sequence components, three-phase voltage phase angle, residual current, voltage, current 2-63 times Sub-harmonic measurement, sub-harmonic content rate and total harmonic distortion rate.


Protection functions include overload inverse time limit, overload definite time limit, grounding, starting overtime, leakage, underload, phase failure, blockage Turn, block, short circuit, overflow, unbalance (current, voltage), over power, under power, over voltage, under voltage, phase sequence, temperature degree, tE time, external fault, limit of starting times, running time alarm, fault times alarm.


10 programmable DI inputs, the default is built-in DC24V power supply, and external active wet contacts can also be selected


6-channel programmable DO output, which can meet the requirements of direct starting, star-delta starting, autotransformer starting, etc.

The remote control "start/stop" of the motor from the master station can be realized through the communication bus.


Optional anti-shock function: support immediate restart after shock and restart after loss of pressure.


Standard 2-way MODBUS_RTU communication, there are PROFIBUS DPV1, Ethernet, PROFINET communication modules for Optional.


Optional 2-way DC4-20mA analog output interface, connected with the DCS system, can monitor the field equipment.


It has various event records such as fault record, start record, stop record, DI displacement record and restart record, which can be checked View a number of motor operation and maintenance information, and at the same time record the motor running record for 1-5 hours.


The display interface supports Chinese/English display.


Support U disk to export waveform record and event record data, you can use EXCEL to open and export event record file.


WIFI function can be added when the color LCD display is selected, and the WIFI can be connected to the mobile phone or computer to view and set the motor protection.


Its perfect protection function ensures the safe operation of the motor, with logic programmable function, can meet a variety of control methods.Different communication modules can be selected to meet the needs of field communication.




Protection Function

  • Fixed time overload
  • Inverse time overload
  • Starting timeout
  • Phase loss
  • Voltage unbalance
  • Current unbalance
  • Locked-rotor
  • under load
  • Block
  • Temperature protection(PTC/NTC)
  • Residual current(grounding/leakage)
  • Under voltage
  • Over voltage
  • Under power
  • Over power
  • tE Time protect
  • Overflow protection
  • Alarm of starting times
  • Running time alarm
  • Fault frequency alarm

Control Mode

  • Protect type
  • Manual mode
  • Two step model
  • Double speed mode
  • Star triangle three successive
  • Power Shake and start again

Communication function

  • 2 channels Modbus-RTU communication
  • 1-2channel PROFIBUS DPV1 communication
  • 1channel PROFINET communication
  • 1-channel Ethernet communication (dual network port)
  • WIFI Communication
Company Acrel Schneider Siemens ABB
Series ARD2M ARD3M Tesys T simocode pro V UMC100
measuring current, heat capacity
Voltage, active power, active energy, frequency
reactive power, reactive energy × ×
harmonic 2-21th 2-63th × × total harmonics
Leakage current/ground current
Positive sequence, negative sequence, zero sequence voltage, current × ×
PTC/NTC
PT100 temperature measurement × × External Module 6 ways
4-20ma input × × × External Module,2 ways External Module 6 ways
Protection Conventional current protection such as inverse time overload
overflow/quick break × ×
tE × ×
Voltage Dependent Protection
leakage current
temperature protection
Insulation monitoring × × ×
Number of starts
Event Record Fault record 8 8 × 16
Start/stop record 8 8 × ×
restart recording 8 8 × ×
Displacement record 8 8 × ×
fault recorder × 49 × ×
Power-on/power-off record 8 8 × ×
running record × 5 hour × ×
Control DI 8 10 6(10) 4(12) 6(14)
DO 5 6 4 3(7) 4(9)
start control
Loss of pressure restart × × ×
4-20mA output 1 2 × 1 1
Graphical programming × ×
communication Modbus-rtu 2 2 1 × 1
Profibus-dp 1 2 1 1
Profinet × 1(2 ports) × √2 ports 1 (2 ports)
ModbusTCP × 1(2 ports) 1 × 1 (2 ports)
Ethernet/IP × × × × 1
Devicenet × × 1 (2 ports) × 1 (2 ports)
Profisafe × × × ×
can × × 1 × 1
wifi × 1 × × ×
special LCD display 2.4寸 × × ×
Protocol customized × ×
Zero sequence transformer 30A × × × ×
Built-in transformer 100A × 100A × 63A
USB interface × × ×
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