Expert Solutions from Deritend Solve Lasting Problem Using a patented system, we solved a lasting problem at one of our client's pumping stations This consists of three variable speed pumps supplying raw water from a reservoir, direct to the Water Treatment Works. We were asked to test the pumps as part of a wider programme across many sites for our client. At the reservoir, two pumps had different manufacturers to the third and as such could not be assumed to operate in the same way. The variable drives were also obsolete and, prior to the project, it had not been possible to obtain any information about the electro-mechanical efficiency of the motor and variablespeed drive arrangement. Informally we had been told that pump three consumed more energy, while station SCADA data showed confu

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