Sensorless vector frequency converter MFC 710/690V type

15 - 800 kW

Product enquiry 


  • Three-phase supply: 3x690 V  50/60 Hz
  • Output: 0 – 400 Hz, 3 x 690 V
  • Advanced control modes: 
                   U/f (linear, square-law scalar), 
                   Vector mode (sensor or sensorless)
  • Removable operating panel with LCD alphanumeric display
  • Integrated Logic Controller (PLC)
  • Built-in "reeler-calculator"
  • Built-in pump or fan set controller
  • Integrated PID controller
  • Embedded communication module RS232/RS485 (Modbus)
  • Programmable fixed frequencies
  • Digital potentiometer function
  • Direct rotational (or linear) incremental encoder (5V line interface)
  • Elimination of resonance frequencies bands
  • Definable shapes and slopes of selected frequency characteristic (linear, "S"-shaped)
  • Allowable work with torque control
  • Automatic identification of motor parameters
  • Programmable control structure:
    • two customizable control variants (A & B):
    • speed selector block (control panel, analog input, PID controller, digital potentiometer, function block),
    • torque selector block(analog inputs, function block),
    • run and direction control (control panel, digital input, function block),
    • programmable digital inputs: run, direction, run blockade, external trip, trip cancellation,
    • programmable digital outputs (3 relays and 1 open collector type): ready, run, fault, warning, overtemperature of heatsink, given speed reaching, threshold speed reaching, current limit, function block),
    • programmable analog outputs: frequency, rotational speed, output current, voltage, loading of motor, function block.
  • Total work counter (hours)
  • Real-time Clock (optional)
  • Diagnostic and blockade system
  • Control panel protection with system of passwords
  • Embedded RFI filter (for up to 18,5kW)
  • Memory for 4 motors parameters
  • Allowable use of default values for all parameters

The 3x690V frequency converters do not have a built-in braking transistor as standard, which makes it impossible to connect an optional braking resistor.

The necessity to equip the converter with a braking transistor (necessary to connect an optional braking resistor) should be reported at the stage of ordering. It is important because the braking transistor is assembled at the converter production stage and it is not possible to add it later.



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