I currently have 4-500KVA transformers per phase with an impedance of 5% per transformer. I just need some clarification how I would size the fault current for this ?????? The building in question is only going to have a main fused switch of 600Amps 3 phase 208V. Also, how would I calculate the available at the downstream Main Distribution Panel that is also 3phase, 208V 600A. I have not done this in a while. Any advice in the calcs ?????????