We had a look in the TX termination box this morning.
The lead armoured 500mm² cable blown out and shorted to earth.
The REF relay at the 11 kV panel had the flag up which tripped the master trip.
The junction box was full with penotrol oil which was all carbonised up. The hard part is to get new oil that over the next couple of days.
The jointers are sourcing parts and preparing the replacement cable.
The TX meggered ok and the windings are luckily not damaged.
The other subs carried the extra 10 MW load ok overnight via the tie switches although there were a few dips around midnight.
I will post you some pics to add to this thread.
Happy New Year anyway, Raymond