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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Related Topics

  • Electrical Amps and electrical wiring, AWG - wire gauge, electrical formulas, motors and units

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