That is a valid formula, but it does not help answering this specific question. The ?power? to which your formula applies is measured in watts, and is called ?real power.? The type of power addressed in the question is measured in VA (or KVA), and is called ?apparent power.? The formula to convert KVA to amps does not contain the term ?power factor.? Phil C?s answer is correct.Originally posted by wyedelta:The correct formula is:
power= squareroot of 3*voltage*current*power factor.
I may be misinterpreting your statement. But it seems to me that you are trying to associate ?transformer losses? with ?power factor,? as though the former is the cause of the later. That is not how things work. Power factor is the natural result of wires being wound in circles, and is not a function of the amount of any copper, eddy current, hysteresis, or other losses internal to the transformer.Originally posted by wyedelta:Guys: If you compute the current using apparent power (KVA) you also include the transformer loses. What I am trying to say when I wrote the formula was that we must compute the line current for maximum current the transformer can deliver.