Speed of Electrical Motors with operating Loads
The speed of operating electrical motors with loads, are lower than the motors synchronous speed (no load)
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The approximate speed (RPM) at rated loads for small and medium motors operating at 60 hz and 50 hz at rated volts can be found in the table below:
| Approximate Electrical Motor Speed (RPM) | ||||
| No. Poles | Speed with Rated Load | Synchronous Speed (no Load) | ||
| 60 hz | 50 hz | 60 hz | 50 hz | |
| 2 Pole | 3450 | 2850 | 3600 | 3000 |
| 4 Pole | 1725 | 1425 | 1800 | 1500 |
| 6 Pole | 1140 | 950 | 1200 | 1000 |
| 8 Pole | 850 | 700 | 900 | 750 |
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