Answer / k.prakashchandra

Both are used for communication .OPGW means optical ground
wire .i.e. optical fiber cable inside the ground wire

sourse is 66 KV / 350 MVA, transfarmer is 1000 KVA 6.6 / 0.415 kv, iF fault is 28.75 MVA on 0.415 KV Bus then calculat the Transfarmer Impidance

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