Answer / 7anoter4

66 kV it is a transmission line. Distribution line-
connecting power transformer -it is usually 4-35 kV. A
small transformer- up to 3000 kVA -built for 66 kV will be
2-3 times more expensive- including breakers or special
high-voltage fuses. The maintenance is more expensive. A
transformer failure could produce a 66 kV line trip and so
a large number of consumers would remain without energy
supply.
The expensive transmission line connects large transformers
in safe conditions and from here cheaper distribution lines
will get close to the cheaper small transformer locations.

Answer / niresh yadav

:+ As we know that ' from feraday first low when any conductor cut the flux more than flux linkage is more * so when primary side of transformer has 66 kv voltage so indused is high ! In comperision primary turns ratio secondary turns are very low when we change 66 kv to 433 volt than secendary are burns due to induction ! So we convert 66 kv to 11 kv first for protection.

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