A.O.Smith Motor Catalog - Universal Electric Motors

Century® Multi-Speed • Three Phase MotorsTotally Enclosed Fan-Cooled (TEFC) - Rigid Base - Two SpeedVariable Torque - 1/.25 thru 50/22 HPFeatures:• Ball Bearings • 60 Hz • 40˚C Ambient • Class B or F Insulation • Service Factor 1.15M680Applications: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 Cast Insulation “C” High Spd. Low Spd.HP Volts High Spd.* Low Spd.* Amps Frame Number Iron Class Dim. Efficiency Efficiency NotesTwo Speed 1800/900 RPM • One Winding • Variable Torque1.5 ~.37 200-230 1-1⁄2 .19 4.3-4.0/1.9-1.7 145T M131 B 13.2 83.0 71.0 1,49460 1-1⁄2 .19 1.95/.85 145T M132 B 13.2 83.0 71.0 1,492~.5 200-230 2 .25 6.4-6.4/2.5-2.6 145T M133 B 13.7 84.0 70.0 1,4940~10 460 40 5.00 50.0/18.5 326T M621 √ F 30.6 92.0 89.0 1,11Two Speed 1800/1200 RPM • Two Winding • Variable Torque1~.44 200-230 1 .30 3.2-3.4/1.8-2.2 145T M140 B 13.2 74.0 60.0 1,49460 1 .30 1.7/1.1 145T M141 B 13.2 74.0 60.0 1,497.5~3.3 200-230 7-1⁄2 2.22 21.3-20.8/12.0-12.0 215T M346 √ F 19.8 86.5 80.0 1,1110~4.4 200-230 10 2.96 30.0-28.0/17.0-17.5 254T M441 √ F 24.8 88.0 80.0 1,1115~6.7 200-230 15 4.40 42.0-38.0/23.0-22.0 256T M447 √ F 24.8 88.0 84.0 1,11460 15 4.40 19.5/11.0 256T M443 √ F 24.8 88.0 84.0 1,1120~8.9 460 20 5.93 24.7/14.0 284T M542 √ F 27.5 90.0 86.0 1,1125~11 460 25 7.40 30.0/17.0 286T M543 √ F 27.5 91.0 86.0 1,1130~13 460 30 8.90 38.0/18.0 324T M623 √ F 30.6 91.0 88.0 1,1140~17.8 460 40 11.87 47.4/25.5 326T M624 √ F 30.6 92.0 89.5 1,11,4950~22.2 460 50 14.84 59.0/27.0 364T M680 √ F 33.3 92.4 88.0 1,11Notes:1. Item to be discontinued when stock is depleted11. C & D flange kit available49. 1.0 Service Factor*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 page192 www.aosmithmotors.com