The CFW300 variable frequency drive is a high-performance VFD for three-phase induction motors. It is ideal for applications on machines or equipment that require precise control with easy setup and operation.

The CFW300 features a compact size with contactor-style electrical connections (top in / bottom out). The VFD’s performance can be scaled to match the application by selecting WEG vector control (VVW) or scalar control (V/F). The CFW300 includes built-in operator interface (HMI) and SoftPLC with free WPS programming software for custom tailored control schemes. A variety of plug-in option modules for additional I/O and communications protocols may be added to provide extended capabilities, making the CFW300 a flexible and cost effective solution for your variable speed requirements.

• Centrifugal pumps
• Fans / Blowers
• Blenders / Mixers
• Centrifuges
• Compressors
• Conveyors
• Roller Tables
• Granulators
• Commercial Dryers
• Rotary Filters

Features and Benefits

Power Supply:
Voltage – Single Phase 110-127 Vac (+10%, -15%)
Single Phase or Three Phase – 200-240 Vac (+10%, -15%)
Frequency – 50 / 60Hz +/- 2Hz

Voltage – 0-230 Vac Three Phase
Frequency – 0-400 Hz, 0.1Hz Resolution

Control Modes:
Volts per Hertz (Scalar)
Sensorless Voltage Vector Sinusoidal PWM (Space Vector Modulation) Switching Frequency 2.5, 5, 10 or 15kHz
Frequency Range – 0-400 Hz
Overload Capacity – 150% for 60 seconds, repeatable every 10 min.

Control Inputs:
4 programmable isolated digital inputs, NPN or 24Vdc logic (PNP)
1 programmable differential analog input; programmable for current or voltage

Control Outputs:
1 programmable relay output: One NO/NC (Form C) 250 Vac / 0.5 A

Field Bus – Optional modules for RS-485, RS-232, CANopen, DeviceNet, Profibus-DP, USB

Motor over current DC link over voltage
Motor overload DC link under voltage
Output phase-to-phase short circuit Drive over temperature
Output phase-to-ground short circuit
External fault
Programming error

Degree of Protection – IP20
Mounting Surface – mounting with screws or DIN rail mounting

Temperature 14 – 122°F (50°C), up to 140°F (60°C) with 2% / 1.8°F (1°C) output current derating
Humidity 5-95% Non Condensing
Altitude 0-3300 ft (1000m) Up to 13,200 ft (4000m) with 1% / 330ft (100m) output current derating

Regulatory Conformance:
EMC Directive 89 / 336 / EEC
Electromagnetic compatibility – Industrial Environment EMC Emission and Immunity with optional filter
ENC61800-2, 3, 5-1
ENC61800-4-2, 3, 4, 5, 6 LVD 73/23/EEC
Low Voltage Directive
UL 508C, UL 840, UL 50
Electrical Equipment standards

Special Functions:
Linear and “S” ramp accel and decel, local/remote control, FWD/REV selection, DC braking, manual and auto torque boost, motor slip compensation, electronic pot, two skip frequencies, maximum and minimum adjustable frequency limits, adjustable output current

4 digit LCD display and 4 keys Readouts for: output frequency (Hz), output current (A), output voltage (V), motor torque (%) in vector mode, DC bus voltage (V), value proportional to frequency (Ex.: RPM), fault and status messages

Download Specs & Data
WEG CFW 300 Brochure