Work out how much current a generator or transformer of a given kVA will deliver at your supply voltage.
Tell us what you need to power and we will confirm the exact model, voltage and configuration — usually within 24 hours.
Unlike the kW-to-kVA conversion, this one needs no power factor. kVA is already current multiplied by voltage, so the only question is how the phases are arranged:
A 20 kVA set at 400 V three-phase therefore delivers about 29 A per phase, not 50 A.
Per phase. In a balanced three-phase system the current in each of the three conductors is the same, and that is the figure quoted on a generator nameplate.
No. Drawing the entire capacity from a single phase unbalances the alternator, causes voltage distortion and can damage the winding. Spread single-phase loads as evenly as you can across all three phases.
Because in three-phase the √3 factor appears in the denominator. The same apparent power is carried by three conductors rather than one, so each carries less current.
