VLT® Sine-wave Filter MCC 101 output filters are differential mode low-pass filters that suppress the switching frequency component from the drive and smooth out the phase-to-phase output voltage of the drive to become sinusoidal. This reduces the motor insulation stress and bearing currents.

By supplying the motor with a sinusoidal voltage waveform, the switching acoustic noise from the motor is also eliminated.

Thermal losses and bearing currents

The sinusoidal voltage supply to the motor reduces hysteresis thermal losses in the motor. Since the motor insulation lifetime is dependent on the motor temperature, the sine-wave filter prolongs the lifetime of the motor.

The sinusoidal motor terminal voltage from the sine-wave filter furthermore has the advantage of suppressing bearing currents in the motor. This reduces the risk of flashover in the motor bearings and thereby also contributes to extended motor lifetime and increased service intervals.

Quality and design

All filters are designed and tested for operation with the VLT® AutomationDrive FC 302, VLT® AQUA Drive FC 202, and the VLT® HVAC Drive FC 102. They are rated for the nominal switching frequency of the FC series and therefore no derating of the drive is needed. The enclosure is designed to match the look and quality of the FC series drives.

Advantages

Compatible with all control principles including flux and VVC+
Parallel filter installation is possible for applications in the high power range

Range

3 x 200 – 500 V, 2.5 – 800 A
3 x 525 – 690 V, 4.5 – 660 A

Enclosures

IP00 and IP20 wall-mounted enclosures rated up to 75 A (500 V) or 45 A (690 V)
IP23 floor-mounted enclosures rated 115 A (500 V) or 76 A (690 V) or more