Ok great thank you it’s starting to make sense. So the equivalent transformer is a 225kva 1.9%z.
But now I just don’t understand how three of these transformers in parallel have the same impedance as a single transformer? To me a single equivalent impedance of 0.6333 makes sense?
But if the...
Ok, That confused me now a little bit.
So to perform my short circuit calculations I’m trying to do, I am trying to first get the equivalent transformer for the bank of three.
So the three 3ph 75kva would then equal one 225kva with a 0.6333%z or a 1.9%Z impedance?
Excellent thank you for your reply. Glad to hear I was on the right track. And thanks for the additional information with regards to different transformers.
Just to confirms, it’s a third because of this formula. 1/ZT = 1/z1 + 1/z2 + 1/z3 (Where z1/2/3 all equal 1.9%) which would give an...
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...
