Answer Posted / vedpraksh uppadhaya

power tranformer are used at substation & they have maximam
efficency at full load .
power transformers have high ratting like wise 5 mva, 8
mva,...
these are used in 66kv , 33kv.
while the distribution have less efficency at full load as
compair to power transformer as well as their is no need of
controlling equipment like as bucollz relay. these are used
for distribution purpose example.500kkva...

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