Polder submersible pumpset are portable pumping units, which have pump below as well as motor above construction with single or else two stage mixed flow impeller design. These are powered by collector cage induction motor appropriate for 400/440 volts, three phases, fifty Hz A.C. supply. The Motor windings are wet kind, entirely enclosed, water filled, water plus oil resistant, tough in design and lightweight. The pump motor unit of close coupled and jacketed construction design offers effective water cooling of the motor by liquid flowing around the motor casing up into the release main.
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