In Round type three phase transformer why the LV side is
inner part and HV outer part in the design of transformer?
why they cant be opposite?

Answer Posted / pratik panchal

HV coil needs denser insulation.
If it is placed between core & LV coil (i.e HV inside and
LV outside), both the sides will require denser insulation.
Hence, if it is placed outside (i.e. HV outside and LV
inside), only its inne side will require denser insulation
to isolate it from LV.

Pratik Panchal
pratikpanchal@hotmail.com

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