Sustainable Shaft Grounding Ensures Reliability ofEnergy-Saving VFDs in Data Center HVAC Systems
Electro Static TechnologyAccording to this white paper written by Adam Willwerth, development manager, Electro Static Technology the use of variable frequency drives (VFDs), also known as inverters, can reduce the cost of cooling data center computer servers. By optimizing the power usage of HVAC fans or pumps, VFDs can provide substantial energy savings. But if the increased efficiency is not sustainable, those savings vanish. Currents induced by VFDs on motor shafts can wreak havoc with motor bearings, dramatically shortening motor life and causing costly repairs and/or downtime. To mitigate these currents and realize the full potential of VFDs, effective, reliable shaft grounding is essential.
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