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Expected Ze reading on LV adjacent to a 800Kva transformer ?

So I'm trying to work out some cable calcs for a sub main leaving LV Side distribution equipment sited adjacent to a 800Kva transformer , any ideas what the Ze is likely to be  ? I would think it will be really low 

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  • Just to be clear. I only asked for Ze values for a particular substation with a 800kVA transformer 

    Understood.

    "Z" has two components - resistive and reactive. Whilst it might be OK to provide 100 A supply Ze and assume x is approximately zero, It's not really a suitable answer to provide a "Ze" values for that size of supply in terms of resistance (or "magnitude") only.