Motor Efficiency: SINGLE_PHASE
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 (%) | hp rating | kw rating (kW) | notes | pf 50 (dimensionless) | pf 75 (dimensionless) | pf fl (dimensionless) | poles | speed rpm (rpm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SINGLE_PHASE | 0.25 | 54 | 60 | 62 | 1/4 | 0.187 | Capacitor-start/capacitor-run (CSCR) 115/230V; single-phase induction motor typical range; efficiency lower than 3-phase due to forward/backward rotating field components | 0.55 | 0.65 | 0.72 | 4 | 1,725 |
| SINGLE_PHASE | 0.333 | 56 | 62 | 64 | 1/3 | 0.249 | Capacitor-start/capacitor-run (CSCR) 115/230V; typical published nameplate efficiency range | 0.57 | 0.67 | 0.74 | 4 | 1,725 |
| SINGLE_PHASE | 0.5 | 58 | 64 | 66 | 1/2 | 0.373 | Capacitor-start/capacitor-run (CSCR) 115/230V | 0.59 | 0.69 | 0.76 | 4 | 1,725 |
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