danfoss.com/drives 800 m of unscreened motor cable performs interference-free View of one of the two Micheville Tunnel routes Case Story | VLT® HVAC Drive FC 102 Micheville achieves high- performance tunnel ventilation – even with long cables Ventilation of the Micheville Tunnel in Luxembourg placed difficult demands on the electrical installations. However Danfoss met the challenge and provided a high efficiency, low harmonic, unscreened long cable solution. As a bonus, it also reduced costs by eliminating the need for a voltage booster transformer.The project demanded high fan efficiency despite long motor cables, and the ability to reverse flow direction quickly. Variable speed control via AC drives was applied to increase the energy efficiency of each jet fan in function

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