630 kVA to Amps
630 kVA is 909.3 A at 400 V and 33.07 A at 11 kV (three-phase), and 2,739 A at 230 V single-phase. Table for common supplies and the formula.
Formula
Worked example
- Three-phase, 400 V: I = 630 × 1,000 / (√3 × 400) = 909.3 A
- Single-phase, 230 V: I = 630 × 1,000 / 230 = 2,739 A
On other supplies
| Supply | Voltage | Current |
|---|---|---|
| Single-phase | 120 V | 5,250 A |
| Single-phase | 230 V | 2,739 A |
| Single-phase | 240 V | 2,625 A |
| Three-phase | 208 V | 1,749 A |
| Three-phase | 400 V | 909.3 A |
| Three-phase | 415 V | 876.5 A |
| Three-phase | 480 V | 757.8 A |
| Three-phase | 690 V | 527.1 A |
| Three-phase | 6,600 V | 55.11 A |
| Three-phase | 11,000 V | 33.07 A |
| Three-phase | 33,000 V | 11.02 A |
Three-phase rows use the line-to-line voltage.
What 630 kVA looks like
630 kVA is one of the most common ratings of three-phase distribution transformers.
This is the rated current only. Cable, breaker and protection settings also depend on the installation, inrush, the rules you work to and the transformer data sheet.
Frequently asked questions
How many amps is 630 kVA?
630 kVA is 909.3 A on a 400 V three-phase supply, 876.5 A at 415 V and 33.07 A at 11 kV. On a 230 V single-phase supply it is 2,739 A. The current depends on the voltage, so there is no single answer.
Why is no power factor needed?
kVA is apparent power, which is voltage times current (times √3 for three-phase). The power factor only matters when you convert kVA to kW.
Is this the rated current of a transformer?
It is the rated line current at that voltage for a balanced load: kVA × 1,000 / (√3 × V). Inrush, overload and fault current are separate questions.
Related
kVA to Amps CalculatorkVA to kW400 kVA to A1,000 kVA to A25 kVA to ATransformer Sizing CalculatorPower ConverterConversion Centre