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Intelligent motor protection and control device
( ECM801 )



ECM801 Intelligent Motor Protection and Control Device is designed on the basis of ECM800. It is applied to 3-phase AC asynchronous motors (380V or 660V).
This intelligent device can replace many decentralized units such as contactors, circuit breakers etc. Besides, its pluggable terminals and standard DIN rail installation saves wiring material usage and reduces cabling complexity and time.
With advanced motor protection, control automation, communication and diagnostics, ECM801 will be the best device for protecting your motors.


  • Integrates measurement, protection, control and communication
  • Unique separation design, CTs are separated from main module.
  • Provides 9 types of standard functions and 8 types of optional protection functions
  • Provides 10 types of motor starting mode
  • Statistic data from the motors, failure logging
  • LED indicators in main module
  • Optional panel for local operation
  • Pluggable terminals, easy to install and maintain
  • Reliable electromagnetic compatibility
  • 35mm DIN rail mounting


Performance Index

  • Standard: GB/T14048.1, GB/T14048.4, GB/T17626.2/3/4/5
  • Power frequency withstand voltage: AC2kV/ min. ~1mA Input--Output--Power
  • Insulation resistance 50M
  • Impulse withstand voltage: 5kV (peak), 1.2/50uS
  • Digital input: standard 9 routes, can be extended to 20 routes. ECM801 provides internal 30VDC power supply for digital input.
  • Relay output: 5 relays, 4NO, 1NC, can be extended to 9 routes.
  • Output capacity of control relay: AC type: 250Vac/12A, 380Vac/5A DC type: 220Vdc/3A
  • Output capacity of signal relay: 250Vac/10A or 30Vdc/5A
  • Analog output load resistance: 350
  • Power supply input: 85~265VAC, 80~ 300VDC
  • Communication protocol: RS485 port/ MODBUS protocol, optional PROFIBUS-DP module
  • Electrical fast transient/burst immunity test: IEC61000-4-4, Level 4
  • Surge immunity test: IEC61000-4-5, Level-3
  • Electrostatic discharge immunity test: IEC61000-4-2, Level 3
  • Radiated immunity test: IEC61000-4-3, Level 3
  • Operating temperature: -20~ 55, humidity: 10~90%, non-condensing
  • Storage temperature: -40~70, humidity: 10~95%, non-condensing

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