IE3-compliant motors for wastewater treatment plant
1 November 2017
Electrical switching & drive systems & components
A major upgrade to a wastewater treatment plant in the Eastern Cape is taking advantage of the energy-saving and cost-efficiency features of the latest IE3-compliant DRN motors from SEW-Eurodrive. An important feature of these motors for wastewater treatment applications is their IP65 rating, A total of six units are being supplied, with two gearboxes fitted with 75 kW DRN motors, two with 45 kW DRN motors, and the remaining two with 37 kW DRN motors.
These units will be used for aerator applications. SEW-Eurodrive employs a special program designed specifically to determine if the gearbox selection is adequate, based on the loads and bending moments. This is particularly important when it comes to aerators and mixers. SEW-Eurodrive therefore selects the optimal gearbox for the application at hand.
Wastewater treatment plants represent a particularly arduous application for these DRN motors, which means auxiliary instrumentation such as PT100s to measure temperature, and thermistors, which are a cut-out failsafe measure when the motor temperature reaches a set high point, are often required. Accessories included strip heaters for colder conditions, and rain canopies.
SEW-Eurodrive now offers its energy-efficient DRN motor series as standard across its entire product range in order to reduce total cost of ownership, which means the payback period is much quicker, and also the return on investment is that much higher.
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