Electrotech Systems. Inc.   


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Electrotech Systems, Inc.

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CFW11 Variable Frequency Drive

The WEG CFW11 series of inverters includes state-of-the-art technology for three-phase induction motor control. Aimed at increasing customer productivity, this new line offers the following innovations:

  • Plug and play philosophy (connect and use) enables quick and easy installation of accessories and options.
  • USB for microcomputer connection for using SUPERDRIVE
  • programming and monitoring software as well as updating inverter firmware.
  • Human-Machine Interface (HMI) with backlit graphic display and softkeys, greatly facilitates inverter programming and operation.
  • DC link inductors (symmetrically connected to positive and negative DC link terminals) enable compliance with IEC61000-3-12 standard requirements regarding harmonics, (no need for external line reactance)
  • Intelligent thermal management enables full protection of IGBTs, monitoring of heatsink and internal air temperature.
  • Automatic control of the heatsink fan with speed sensor (additional protection) and easily detachable from the unit for cleaning and maintenance.
  • Normal Duty and Heavy Duty ratings to adapt optimally to all kinds of loads.
  • Protection with failure and alarm warnings.

  • Motor overload protection in compliance with IEC 60947-4-2/UL 508 C.

  • Memory card built into the standard product allows user to create functions without the need to use an external PLC (soft-PLC via IEC61131-3 programming software)

  • Guided start-up simplifies initial user programming.

  • Real time clock

  • TRACE / SCOPE function to assist with the start-up and system diagnostics.

Mounting Options:






                                    Air Flow                                           Air Flow

                     Surface Mounting                              Flange Mounting


Why 18-Pulse?

IEEE 519-1992 voltage and current harmonic compliance

Reduced harmonics prevents:

Overloading of breakers which can cause nuisance trips

Oversizing transformers to eliminate overheating

Utility penalty costs associated with poor harmonics

Avoids resonance problems associated with harmonic filters

Proven technology with significantly less components when compared to harmonic filters



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