English
Türkçe
Motor Full-Load Current Chart (kW → A)
Approximate full-load current of three-phase electric motors at 400 V and 230 V, plus a quick calculator from the nameplate values.
Quick full-load current
Iₙ = — A
Iₙ = P / (√3 · U · cosφ · η)
Full-load current chart (3-phase, indicative)
| kW | HP | ~A @400V | ~A @230V |
|---|---|---|---|
| 0.37 | 0.5 | 1.1 | 2 |
| 0.55 | 0.7 | 1.5 | 3 |
| 0.75 | 1 | 1.9 | 3 |
| 1.1 | 1.5 | 2.7 | 5 |
| 1.5 | 2 | 3.5 | 6 |
| 2.2 | 3 | 4.9 | 8 |
| 3 | 4.1 | 6.6 | 11 |
| 4 | 5.4 | 8.5 | 15 |
| 5.5 | 7.5 | 11.5 | 20 |
| 7.5 | 10.2 | 15.5 | 27 |
| 11 | 15 | 22 | 38 |
| 15 | 20.4 | 29 | 50 |
| 18.5 | 25.2 | 35 | 61 |
| 22 | 29.9 | 41 | 71 |
| 30 | 40.8 | 55 | 95 |
| 37 | 50.3 | 67 | 116 |
| 45 | 61.2 | 80 | 138 |
| 55 | 74.8 | 98 | 170 |
| 75 | 102 | 135 | 234 |
| 90 | 122.4 | 160 | 277 |
| 110 | 149.6 | 195 | 337 |
| 132 | 179.5 | 230 | 398 |
| 160 | 217.6 | 280 | 484 |
| 200 | 272 | 340 | 588 |
| 250 | 340 | 425 | 735 |
| 315 | 428.4 | 530 | 917 |
| 355 | 482.8 | 600 | 1038 |
Indicative for standard 4-pole 400 V motors (cos φ≈0.85). Use the nameplate for design and see our cable size and protection selection tools.
Frequently asked questions
How is full-load current found from kW?
Iₙ = P / (√3 · U · cos φ · η). The chart uses ~400 V, cos φ≈0.85 and typical efficiency; always use the value on the motor nameplate for design.
Why is the 230 V current higher?
For the same power, current is inversely proportional to voltage, so at 230 V the current is roughly 1.73× the 400 V value.
Are these values exact?
No — they are indicative for standard 4-pole motors. Power factor and efficiency vary by class (IE3/IE4/IE5) and size; use the nameplate.