What is reason of rating of transmission line multi pal of 11 like as 11/33/66

What is reason of rating of transmission line multi pal of 11
like as 11/33/66/220 ? Why not use 75 kv 23 kv line in power
system ?

Question Posted / vikash saini

What is reason of rating of transmission line multi pal of 11 like as 11/33/66/220 ? Why not use 7..

Answer / sonu kumar

Actually 11 multiple is used beacuse transmission network assume approximate loss is 10%
during power transmit

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