Page 194 - A O Smith 2012
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192
Century® Multi-Speed • Three Phase Motors
Totally Enclosed Fan-Cooled (TEFC) - Rigid Base - Two Speed
Variable Torque - 1/.25 thru 50/22 HP
Features:
• Ball Bearings • 60 Hz • 40˚C Ambient • Class B or F Insulation • Service Factor 1.15
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 Cast Insulation “C”
High Spd.
Low Spd.
HP
Volts
High Spd.* Low Spd.*
Amps
Frame Number Iron Class Dim.
Efficiency Efficiency Notes
Two Speed 1800/900 RPM • One Winding • Variable Torque
1.5 ~.37
200-230
1-1⁄2
.19
4.3-4.0/1.9-1.7
145T
M131
B 13.2
83.0
71.0
1,49
460
1-1⁄2
.19
1.95/.85
145T
M132
B 13.2
83.0
71.0
1,49
2~.5
200-230
2
.25
6.4-6.4/2.5-2.6
145T
M133
B 13.7
84.0
70.0
1,49
40~10
460
40
5.00
50.0/18.5
326T
M621
√
F 30.6
92.0
89.0
1,11
Two Speed 1800/1200 RPM • Two Winding • Variable Torque
1~.44
200-230
1
.30
3.2-3.4/1.8-2.2
145T
M140
B 13.2
74.0
60.0
1,49
460
1
.30
1.7/1.1
145T
M141
B 13.2
74.0
60.0
1,49
7.5~3.3
200-230
7-1⁄2
2.22 21.3-20.8/12.0-12.0 215T
M346
√
F 19.8
86.5
80.0
1,11
10~4.4
200-230
10
2.96 30.0-28.0/17.0-17.5 254T
M441
√
F 24.8
88.0
80.0
1,11
15~6.7
200-230
15
4.40 42.0-38.0/23.0-22.0 256T
M447
√
F 24.8
88.0
84.0
1,11
460
15
4.40
19.5/11.0
256T
M443
√
F 24.8
88.0
84.0
1,11
20~8.9
460
20
5.93
24.7/14.0
284T
M542
√
F 27.5
90.0
86.0
1,11
25~11
460
25
7.40
30.0/17.0
286T
M543
√
F 27.5
91.0
86.0
1,11
30~13
460
30
8.90
38.0/18.0
324T
M623
√
F 30.6
91.0
88.0
1,11
40~17.8
460
40
11.87
47.4/25.5
326T
M624
√
F 30.6
92.0
89.5
1,11,49
50~22.2
460
50
14.84
59.0/27.0
364T
M680
√
F 33.3
92.4
88.0
1,11
Notes:
Continues on next page
1. Item to be discontinued when stock is depleted
11. C & D flange kit available
49. 1.0 Service Factor
*
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.
M680
