We have a 3 phase, 150 KVA bank, 120/208v. Three 50 KVA transformers each with 2% Imp. When calculating the 3 phase fault current, do you use 2% Imp. or 6% Imp.
We have been requested to replace overhead facilities with underground in our downtown area. Most of the area requires 120/240 v three phase which do not offer because of what we have been told is ferroresonance and harmonic issues. Has anyone used these type transformers and if so, were there...