Related Resources: motors
Polyphase Medium Induction Motors NEMA Horsepower and Speed Ratings
Electric Motors Design and Engineering
* Horsepower and Speed Ratings, Polyphase Medium Induction Motors
Polyphase Motors Voltages
1. 60 hertz—115*, 200, 230, 460, 575, 2300, 4000, 4600, and 6600 volts
2. Three phase, 50 hertz - 220 and 380 volts
NOTE—It is not practical to build motors of all horsepower ratings for all of the standard voltages.
*Applies only to motors rated 15 horsepower and smaller.
60-Hertz Induction Motors | 50-Hertz Induction Motors | ||||||||||
Hp | Synchronous Rpm | Synchronous Rpm | |||||||||
1/2 |
... |
... |
... |
900 |
720 |
600 |
514 |
... |
... |
... |
750 |
|---|---|---|---|---|---|---|---|---|---|---|---|
3/4 |
... |
... |
1200 |
900 |
720 |
600 |
514 |
... |
... |
1000 |
750 |
1 |
... |
1800 |
1200 |
900 |
720 |
600 |
514 |
... |
1500 |
1000 |
750 |
1-1/2 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
2 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
3 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
5 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
7-1/2 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
10 |
3600* |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
15 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
20 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
25 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
30 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
40 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
50 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
60 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
75 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
100 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
125 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
514 |
3000 |
1500 |
1000 |
750 |
150 |
3600** |
1800 |
1200 |
900 |
720 |
600 |
... |
3000 |
1500 |
1000 |
750 |
200 |
3600** |
1800 |
1200 |
900 |
720 |
.. |
... |
3000 |
1500 |
1000 |
750 |
250 |
3600** |
1800 |
1200 |
900 |
... |
... |
.. |
3000 |
1500 |
1000 |
750 |
300 |
3600** |
1800 |
1200 |
... |
... |
... |
... |
3000 |
1500 |
1000 |
... |
350 |
3600** |
1800 |
1200 |
... |
... |
... |
... |
3000 |
1500 |
1000 |
... |
400 |
3600** |
1800 |
... |
... |
... |
... |
... |
3000 |
1500 |
... |
... |
450 |
3600** |
1800 |
... |
... |
... |
... |
... |
3000 |
1500 |
... |
... |
500 |
3600** |
1800 |
... |
... |
... |
... |
... |
3000 |
1500 |
... |
... |
**Applies to squirrel-cage motors only.
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