VLT® Low Harmonic Drives have the same modular build-up as our normal high power drives and share features like high energy efficiency, backchannel cooling and user-friendly operation.
The VLT® Low Harmonic Drive meets the toughest harmonic recommendations and gives the user full readout of the unit performance towards the grid including graphical overview of grid behaviour.
VLT® Low Harmonic Drive is the perfect solution for
• Meeting IEEE519 recommendation
• Generator powered installation
• Installation with Generator Backup
• Soft power grid
• Installation of HP-drive in grids with limited excessive power capacity
Voltage range
• 380 – 460 V AC 50 – 60 Hz
Power Range
160 - 710 kW (Matching drive frames D, E and F)
Enclosure degree
• IP 21, IP 54*
PC software
MCT 10
Ideal for commissioning, servicing, monitoring and performance logging.
MCT 31
Harmonic calculation tool supporting VLT® Low Harmonic Drives.
RoHS compliant
The VLT® Low Harmonic Drives are manufactured with respect to the environment, and they comply with the RoHS directive.
Options
• dU/dt filters: For providing motor insulation protection
• Sine filters (LC filters): Reduce motor noise
Back-channel cooling
A unique design uses a ducted back channel to pass cooling air over heat sinks, with minimal air passing through the electronics area. This allows 85% of the heat losses to be exhausted directly outside of the enclosure, improving reliability and prolonging life by dramatically reducing temperature rise and contamination of the electronic components. There is an IP54 seal between the back-channel cooling duct and the electronics area of the drive.