As I don't have any practical experience in power distribution networks, I'm pretty confused about a few things. Typically a lot of transformers are connected to an 11KV distribution line ( 11KV feeder.)
For an 11KV/440V three-phase transformer, if any fault (L-L / L-G / L-L-L-G) occurs on the low voltage side, the fuses of the transformer will trip.
Is there any possibility that the ACR (or OCR for old substations) will trip and will shut down the whole 11KV line?
If a fault occurs on one transformer's low voltage side, will the other transformer on the same 11KV line be affected?