kVA to Amps at 400V Three-Phase Calculator
Convert kVA to amps for a balanced three-phase supply at 400 volts line to line. The calculation uses the square root of three, and it applies to…
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Convert kVA to amps for a balanced three-phase supply at 400 volts line to line. The calculation uses the square root of three, and it applies to balanced loads only.
Worked example
Example calculated from the starting values. Enter your own values and press Calculate to get your result.
With the default inputs (apparent power = 50 kVA), the results are: line current at 400 V 72.2 A.
Quick reference: apparent power vs result
Reference table based on the example values; it is not your calculation result.
| Apparent power (kVA) | Line current at 400 V |
|---|---|
| 25 | 36.1 A |
| 50 | 72.2 A |
| 100 | 144.3 A |
| 250 | 360.8 A |
| 500 | 721.7 A |
| 1,000 | 1,443.4 A |
Frequently asked questions
What formula does this calculator use?
Line current at 400 V = x × 1000 ÷ (sqrt(3) × volts). Variables: x = apparent power in kVA. Fixed values: volts = 400.
What do I need to enter?
You need apparent power (kVA). Results update as you type.
What is an example result?
With the default inputs (apparent power = 50 kVA), the results are: line current at 400 V 72.2 A.
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