A.O.Smith Motor Catalog - Universal Electric Motors

Dripproof - Rigid Base - Two SpeedVariable Torque - 1/.25 thru 40/10 HPFeatures:Century® Multi-Speed • Three Phase Motors• Ball Bearings• 60 Hz• 40˚C Ambient• Class B or F Insulation• Service Factor 1.15M314Applications:For two-speed, one and two winding, variable torque applications for speed control from one speed to another while under load.Blowers, fans, conveyeors, mixing machines, centrifugal pumps.Oper. HP Oper. HP Full Load Stock Insulation “C” High Spd. Low Spd.HP Volts High Spd.* Low Spd.* Amps Frame Number Class Dim. Efficiency Efficiency NotesTwo Speed 1800/900 RPM • Two Winding • Variable Torque2~.5 460 2 0.25 3.0/1.2 182T M210 B 12.6 78.5 62.03~.75 460 3 0.37 4.3/2.0 184T M211 B 12.6 75.0 61.05~1.2 460 5 0.63 7.1/3.3 215T M314 B 15.6 83.0 55.07.5~1.9 460 7-1⁄2 0.94 9.6/4.6 215T M316 F 16.6 86.0 70.010~2.5 460 10 1.25 12.5/5.5 256T M415 F 22.1 87.0 74.015~3.75 460 15 1.87 18.0/7.5 256T M422 F 22.1 88.0 75.020~5 460 20 2.50 24.5/10.0 286T M511 F 24.3 87.0 77.025~6.25 460 25 3.12 30.0/12.0 286T M512 F 24.3 89.0 84.0Notes:1. Item to be discontinued when stock is depleted21. Terminal in bracket construction326. Cast Iron*The operating horsepower is based on the type load where the horsepower requiredvaries as the cube of the speed. Examples of such loads are fan or blower systemsand centrifugal pumps.Two-speed motor performance data sheets are available fromyour A. O. Smith Customer Service Center.Continues on next pagewww.aosmithmotors.com191