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MFC Kit Instructions
Pre-Installation Planning
3.0
Verify the Application
MFC Filter Kit Rating
Make sure that the MFC Filter Kit is correct for the application. The voltage rating of the filter kit
must match the voltage and current rating of the connected drive. The horsepower and current
rating of the filter kit must be appropriate for the connected load.
Product Description
The MFC Filter kit is a low-pass sine wave filter designed and developed by TCI to deliver
conditioned power to motor loads driven by PWM drives at a variety of lead lengths. The MFC Kit
is available for 460/480 Volt and 575/600 Volt systems.
The MFC Filter kit is a passive filter connected in series with the output terminals of the variable
frequency drive. It is designed to remove the carrier frequency distortion from the output voltage
waveform. The use of this low-pass filter will result in a nearly pure sine wave voltage profile. This
design will reduce the effects of the reflected wave phenomenon, (dV/dt), such as insulation
damage or premature failure in motors, transformers, and VFD output cables. The MFC Filter Kit
will also reduce the effects of stray high frequency harmonic currents, thereby reducing VFD ground
fault problems and noise interference in transducer signals.
The MFC Filter Kit is suitable for all lead lengths extending as far as 15,000 feet.
The MFC Filter Kit consists of the following standard features and components:
• A TCI 3-phase line reactor specifically designed for high PWM ripple current from the
sine wave filter application
• High-endurance, PWM current ripple rated capacitors
• Capacitor bleeder resistors to ensure safe capacitor discharge upon filter shutdown.
• Brackets for mounting capacitors to a panel (only for kits above 50 Amps)
• Damping resistors (optional)
• PQconnect monitoring and communications (optional)
3.0 Pre-Installation Planning
7
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