I am working on a short circuit calculation for three 3ph 75kVA transformers in parallel. All three are identical with 1.9%Z.
The total bank rating is then 3x75kva = 225kVA. But I'm not sure on the equivalent impedance? Would it be 1/ZT = 1/z1 + 1/z2 + 1/z3 (Where z1/2/3 all equal 1.9%) which...