Page 192 - A O Smith 2012
Basic HTML Version
190
Century® Multi-Speed • Three Phase Motors
Dripproof - Rigid Base - Two Speed
Variable Torque - 1/.44 thru 40/18 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 1800/1200 RPM • Two Winding • Variable Torque
1~.44
460
1
.30
1.7/1.1
145T
M109
B
12.6
74.0
60.0
21
1.5~.68
200-230
1-1⁄2
.44
5.0-4.9/2.9-2.8
145T
M125
B
13.1
71.0
80.0
21
460
1-1⁄2
.44
2.4/1.4
145T
M104
B
13.1
75.0
71.0
21
2~.88
200-230
2
.59
6.4-6.1/3.8-4.1
182T
M220
B
12.6
81.0
72.0
460
2
.59
3.0/2.0
182T
M207
B
12.6
80.0
70.0
3~1.3
200-230
3
.89
9.0-8.4/4.8-4.8
184T
M221
F
12.6
81.0
75.0
460
3
.89
4.6/2.6
184T
M208
B
12.6
82.5
74.0
5~2.2
200-230
5
1.48
16.0-15.5/9.7-10.2 215T
M320
B
15.6
86.0
78.0
460
5
1.48
7.1/4.8
215T
M305
B
15.6
78.0
71.0
7.5~3.3
200-230
7-1⁄2
2.22
22.0-19.5/12.3-12.3 215T
M317
F
18.3
89.0
85.0
460
7-1⁄2
2.22
10.0/6.0
215T
M315
F
16.6
87.0
80.0
10~4.4
200-230
10
2.96
27.0-24.0/14.5-13.0 256T
M421
F
22.1
88.0
80.0
460
10
2.96
12.0/6.3
256T
M413
F
22.1
87.0
82.0
15~6.7
200-230
15
4.40
40.0-36.0/20.0-19.0 284T
M521
F
24.3
86.0
85.0
460
15
4.40
18.0/9.5
256T
M423
F
22.1
86.0
81.0
20~8.9
200-230
20
5.93
54.0-48.0/28.0-26.0 286T
M522
F
24.3
89.0
86.0
460
20
5.93
24.0/13.0
286T
M504
F
24.2
90.0
84.0
25~11
460
25
7.40
29.0/17.5
286T
M515
F
24.3
91.0
86.0
30~13.3
460
30
8.90
36.0/18.5
286T
M514
F
24.3
91.0
88.0
Notes:
Continues on next page
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
M312
