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Speed of Electrical Motors with operating Loads

Speed of an operating electrical motor with load is lower than the synchronous speed (no load) of the motor

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Synchronous and approximate speed (rpm) at rated load for small and medium motors operating at 60 hz and 50 hz:

Approximate Electrical Motor Speed (rpm)
No. PolesSpeed with Rated LoadSynchronous Speed (no Load)
60 hz50 hz60 hz50 hz
2 3450 2850 3600 3000
4 1725 1425 1800 1500
6 1140 950 1200 1000
8 850 700 900 750
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  • en: electrical motor speed synchronous operating
  • es: operativo sĂ­ncrono velocidad del motor elĂ©ctrico
  • de: elektrische Motordrehzahl Synchronbetriebs
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