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Motor Efficiency: NEMA STANDARD 3PH
300 to 500
Motor efficiency and power factor � NEMA MG 1 efficiency and power factor data at full, 75%, and 50% load for standard and premium efficiency motors by horsepower
| motor class | hp numeric | efficiency 50 pct (%) | efficiency 75 pct (%) | efficiency fl pct (%) | fla 230V (A) | fla 460V (A) | hp rating | kw rating (kW) | pf 50 (dimensionless) | pf 75 (dimensionless) | pf fl (dimensionless) | poles | speed rpm (rpm) | standard |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NEMA STANDARD 3PH | 300 | 94 | 95.4 | 95.4 | 748 | 374 | 300 | 223.8 | 0.79 | 0.87 | 0.9 | 4 | 1,790 | NEMA MG 1-2016 Table 12-11 |
| NEMA STANDARD 3PH | 350 | 94 | 95.4 | 95.4 | 872 | 436 | 350 | 261.1 | 0.79 | 0.87 | 0.9 | 4 | 1,790 | NEMA MG 1-2016 Table 12-11 |
| NEMA STANDARD 3PH | 400 | 94.5 | 95.8 | 95.4 | 992 | 496 | 400 | 298.4 | 0.8 | 0.87 | 0.9 | 4 | 1,790 | NEMA MG 1-2016 Table 12-11 |
| NEMA STANDARD 3PH | 450 | 94.5 | 95.8 | 95.8 | 1,116 | 558 | 450 | 335.7 | 0.8 | 0.87 | 0.9 | 4 | 1,790 | NEMA MG 1-2016 Table 12-11 |
| NEMA STANDARD 3PH | 500 | 94.5 | 95.8 | 95.8 | 1,236 | 618 | 500 | 373 | 0.81 | 0.88 | 0.91 | 4 | 1,790 | NEMA MG 1-2016 Table 12-11 |
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