Transformer Inrush

[GadreP]

Guys, I have a step-up transformer 100 kVA, 415/11000V. The impdance is 5%. What is a value of inrush current? I read some articles but everybody has different views which is really confusing me. Some people say 10-12 times rated primary current & some people say 10-12 time secondary rated current.
To my opinion,inrush current we assume is 10 times the primary FLA. Can you please suggest me a correct answer. And what would be the value of inrush current for above said transformer? Would it be 1.4 kA or 1.68 kA?

 

[amrpower]

I think for the new transformers, the material of the core is improved a lot, so the inrush current may not exceed 6-8 times FLA.