Page 193 - A O Smith 2012
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191
Century® Multi-Speed • Three Phase Motors
Dripproof - Rigid Base - Two Speed
Variable Torque - 1/.25 thru 40/10 HP
Features:
Applications:
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 Notes
Two Speed 1800/900 RPM • Two Winding • Variable Torque
2~.5
460
2
0.25
3.0/1.2
182T
M210
B
12.6
78.5
62.0
3~.75
460
3
0.37
4.3/2.0
184T
M211
B
12.6
75.0
61.0
5~1.2
460
5
0.63
7.1/3.3
215T
M314
B
15.6
83.0
55.0
7.5~1.9
460
7-1⁄2
0.94
9.6/4.6
215T
M316
F
16.6
86.0
70.0
10~2.5
460
10
1.25
12.5/5.5
256T
M415
F
22.1
87.0
74.0
15~3.75
460
15
1.87
18.0/7.5
256T
M422
F
22.1
88.0
75.0
20~5
460
20
2.50
24.5/10.0
286T
M511
F
24.3
87.0
77.0
25~6.25
460
25
3.12
30.0/12.0
286T
M512
F
24.3
89.0
84.0
Notes:
Continues on next page
1. Item to be discontinued when stock is depleted
21. Terminal in bracket construction
326. Cast Iron
*
The operating horsepower is based on the type load where the horsepower required
varies as the cube of the speed. Examples of such loads are fan or blower systems
and centrifugal pumps.Two-speed motor performance data sheets are available from
your A. O. Smith Customer Service Center.
• Ball Bearings
• 60 Hz
• 40˚C Ambient
• Class B or F Insulation
• Service Factor 1.15
M314
