icient control with variable speed drives

摘要

A European wastewater treatment plant, built in an underground cavern, required an energy efficient and accurate water treatment process. The plant achieved this goal by using more than 50 variable speed drives, which provided the added benefit of reducing strain on the plant, leading to an increased operating life. More than 50 Vacon AC variable speed drives, with ratings from 1.1 kW to 355 kW, are helping to meet the requirements for accurate, dependable and efficient control of the pumps and compressors used in a new wastewater treatment plant at Kakolanmaki in Turku, Finland. The plant, which cost more than ?125 million to build, is jointly owned by ten municipalities and treats the wastewater from 280,000 people.