grundfos data booklet

SP A, SP33. Submersible motorsFeatures and benefitsA complete motor rangeGrundfos offers a complete range of submersiblemotors in different voltages:Submersible motors, MS• 4" motors, single-phase up to 2.2 kW:– 2-wire– 3-wire– PSC (permanent split capacitor)• 4" motors, three-phase up to 7.5 kW• 4" industrial motors, three-phase up to 5.5 kW• 6" motors, three-phase from 5.5 to 30 kW• 6" industrial motors, three-phase up to 22 kW.Submersible, rewindable motors, MMS• 6" motors, three-phase from 3.7 to 37 kW• 8" motors, three-phase from 22 to 110 kW• 10" motors, three-phase from 75 to 190 kW• 12" motors, three-phase from 147 to 250 kW.High motor efficiencyWithin the area of high motor efficiency, Grundfos is amarket leader.Rewindable motorsThe 2-pole Grundfos MMS submersible motors are alleasy to rewind. The windings of the stator are made ofa special water-proof wire of pure electrolytic coppersheathed with special non-hydroscopic thermoplasticmaterial. The fine dielectric properties of this materialallow direct contact between the windings and theliquid for efficient cooling of the windings.Industrial motorsFor heavy-duty applications, Grundfos offers acomplete motor range of industrial motors with up to5 % higher efficiency than that of Grundfos' standardmotors. The industrial motors are available in sizes2.2 to 22 kW. The cooling of the motor is very efficientdue to the large motor surface. The efficient coolingmakes it possible to increase the liquid temperature to60 °C at a minimum flow of 0.15 m/s past the motor.The industrial motors are for customers who value lowoperating costs and long life higher than price.Grundfos industrial motors are developed for difficultoperating conditions. These motors will stand a higherthermal load than standard motors and thus have alonger life when subjected to high load. This applieswhether the high load is caused by bad power supply,hot water, bad cooling conditions, high pump load, etc.Please note that heavy-duty motors are longer thanmotors for standard conditions.Fig. 9MS motorsFig. 10 MMS motorsTM00 7305 1096TM01 7873 4799 - GrA4575 3908Submersible motors9