Transcription of LEESON Basic Training - Electric Heaters,Level …
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LEESON Basic Training - Electric Heaters,Level …
Basic TRAININGMOTORS, GEARS & DRIVESINDUSTRIAL-DUTY & COMMERCIAL-DUTYE lectric MotorsGear ReducersGearmotorsAC & DC Drives-1- Basic Training Industrial-Duty & Commercial-DutyElectric MotorsGear ReducersGearmotorsAC & DC DrivesA Publication OfCopyright 1999 Price $ ..4 Electric Motor History and PrinciplesII. General Motor Replacement Guidelines ..7 III. Major Motor Types ..10AC Single PhaseAC PolyphaseDirect Current (DC)GearmotorsBrakemotorsMotors For Precise Motor ControlIV. Mechanical Considerations ..16 Enclosures and EnvironmentNEMA Frame/Shaft SizesNEMA Frame SuffixesFrame PrefixesMountingV. Electrical Characteristics and Connections ..24 VoltagePhaseCurrent FrequencyHorsepowerSpeedsInsulation ClassService FactorCapacitorsEfficiencyThermal Protection (Overload)Individual Branch Circuit WiringReading a LEESON Model NumberMajor Motor Components-2-VI.
ment of the phase winding groups in conjunction with the phase sequence of the power supply line produces a rotating field around the rotor surface.
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