The interference-free tunnel ventilation solution used VLT® HVAC Drive installed with no less than 800 m of unscreened motor cable.
The Micheville Tunnel project in Luxembourg demanded high fan efficiency despite long motor cables, and the ability to reverse flow direction quickly. Danfoss met the challenge and provided a high efficiency, low harmonic, unscreened long cable solution.
Variable speed control via AC drives was applied to increase the energy efficiency of each jet fan. As a bonus, it also reduced costs by eliminating the need for a voltage booster transformer.
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