A.O.Smith Motor Catalog - Universal Electric Motors

Dripproof - Rigid Base - Two SpeedVariable Torque - 1/.25 thru 50/12.5 HPFeatures:Century® Multi-Speed • Three Phase Motors• Ball Bearings• 60 Hz• 40˚C Ambient• Class B or F Insulation• Service Factor 1.15Applications: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.M312Oper. 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 • One Winding • Variable Torque1~.25 200-230 1 .12 3.5-3.4/1.5-1.6 143T M126 B 12.1 76.0 59.0 21460 1 .12 1.8/.75 143T M116 B 12.1 76.0 59.0 211.5~.37 200-230 1-1⁄2 .19 5.0-4.8/2.1-2.1 145T M127 B 12.6 80.0 65.0 21460 1-1⁄2 .19 2.25/.95 145T M120 B 12.6 80.0 65.0 212~.5 200-230 2 .25 6.2-6.4/2.6-2.7 145T M128 B 13.1 81.0 67.0 213~.75 200-230 3 .375 10.1-11.6/4.1-4.4 182T M222 B 13.7 82.0 72.0460 3 .375 6.6/2.4 182T M206 F 13.7 80.0 66.05~1.25 200-230 5 .63 16.0-17.7/6.2-6.2 184T M223 F 13.7 85.0 77.0460 5 .63 9.1/3.2 184T M302 F 13.7 84.0 73.07.5~1.9 200-230 7-1⁄2 .94 23.0-22.5/9.3-8.2 213T M321 F 17.3 85.0 72.0460 7-1⁄2 .94 11.8/4.2 213T M312 F 17.3 85.0 72.010~2.5 200-230 10 1.25 27.7-32.4/11.2-11.6 215T M322 F 17.3 88.0 77.0460 10 1.25 15.0/5.3 215T M313 F 17.3 83.0 71.015~3.7 200-230 15 1.87 42.5-40.0/16.5-17.0 256T M425 F 22.1 90.2 84.0460 15 1.87 19.3/7.8 256T M412 F 22.1 88.5 81.520~5 200-230 20 2.50 56.0-51.0/21.5-21.5 284T M520 F 24.3 90.2 82.5460 20 2.50 25.2/10.0 256T M424 F 22.1 89.5 82.525~6.25 460 25 3.12 31.0/12.0 286T M506 F 24.3 89.5 84.030~7.5 460 30 3.75 35.5/13.5 286T M513 F 24.2 90.2 85.5Notes:21. 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.com189