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DANFOSS Launch VLT® Low Harmonic Drive

VLT® AQUA Drive, VLT® AutomationDrive and VLT® HVAC Drive are now available in a low harmonic version. The VLT® Low Harmonic Drive reduces the harmonic distortion and load on the supply network by actively imposing currents in counter phase, so that the high quality sine wave of the network current is restored.

Like other VLT® drives, the Low Harmonic Drive is built on a highly modular technology platform where the base elements have proven their functionality, quality and overall reliability in other parts of the broad VLT® drives program.

The VLT® Low harmonic drive has the same modular build-up as our normal high power drives and share features like high energy efficiency, backchannel cooling and user-friendly operation. Due to the modular principle, most elements are produced in large scale, leading to cost effective production.

Where the performance of other low harmonic technologies depends on the network stability and load, or effect the controlled motor, the new Danfoss Low Harmonic drives continuously regulate according to network and load conditions without affecting the connected motor.

VLT® Low Harmonic Drives are motor friendly, with output impulse and shaft voltages compatible with motors conforming to IEC 60034-17/25, as per standard VLT® Drives.

The VLT® Low Harmonic Drive meet the toughest harmonic recommendations and give the user full readout of the unit performance towards the network including graphical overview of network behaviour.

Voltage range:
• 380-480V, 50-60Hz,

Power range:
• 132 – 630kW High Overload
• 160-710kW Normal Overload

Key specification features:
• Harmonic performance <5% THiD
• Meets IEEE519 recommendations for short circuit ratios (RSC) >20
• >0.98 true power factor
• Graphical local control panel & software tool with data & event log
• Energy saving function via programmable sleep mode of filter
• Compact IP21 & 54 enclosures with segregated back channel cooling (85% of heat dissipated via back channel)
• Integrated RFI filter meeting IEC 61800.3:2005 Cat C3 (C2 option) with 150m screened motor cable.
• PCB protection to IEC 6072-3-3 , Class 3C2 / 3C3
• Factory load tested

VLT® Low Harmonic Drives are suitable for installation in low voltage supply networks including:
• Networks with limited spare power
• Weak supply networks
• Generator-powered installations or installations with generator back-up

Standard VLT® AQUA Drive, VLT® AutomationDrive and VLT® HVAC Drive cover the power ratings 0.25kW – 1.4MW and incorporate twin DC bus chokes for harmonic suppression suitable for most applications. The introduction of the Low Harmonic version expands the range of harmonic mitigation solutions to meet increasing demands for ‘clean’ power supply networks, including advanced passive filters and software tools for simulation, product selection, set-up and analysis.

Danfoss Drives offers technical sales and service support facilities in over 100 countries worldwide.

Email: drivesuk@danfoss.com


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Arundel Jones Associates Ltd Registered in England and Wales No. 07334149
Hill Farm, Linton Hill, Maidstone, Kent ME 17 4AL
Tel : 01622 745333 email
copyright all rights reserved

News Categories : Invertor Drives Controls Motors
Variable Speed Drives