These low-head range turbines are appropriate to huge discharge. The plants are built as chamber, as S-type or as bulb units in horizontal or vertical design with 3 to 6 blades.
Due to optimized coordinationofguide vaneand runner bladeposition the water flow is passed over the entire range of discharge thattheoutflowis optimal andthe water hasa minimum ofrotational energy in the draft tube. TheKaplan-aggregate situatesthe generator and the turbine in a casing inside the water carrying tube.
At low heads direct coupled Kaplan turbines with permanent magnet generators are an ideal solution in terms of price and efficiency.