CRITERIA FOR STABLE AND EFFICIENT OPERATION OF PUMPING EQUIPMENT WITH A FREQUENCY CONTROL DRIVE
The results of the development of criteria are presented to ensure the stable operation of pumping equipment with a REB in the entire required range of flows. The analysis of the results of theoretical studies of the operating modes of pumping stations equipped with electronic devices shows that the introduction of a variable drive complicates the process of calculating and selecting pumping equipment, since with a change in the impeller speed, the range of possible pump operating modes expands. This does not exclude the operation of the pump in unacceptable modes outside the working area, even if all conditions were met at the nominal mode. In addition, when selecting variable frequency pumping equipment, it is quite difficult to calculate the amount of energy consumption for the estimated period of operation.