So back to the OP's situation, what are the typical options for connecting to the primary of a transformer off at LRG system? I did ask if there was a neutral available and did not get an answer. Would a Delta Wye transformer be preferable in this situation?
Yes, Delta-Wye is still typical
Why is that? Such loads won't cause any current through the earthing resistance.
This gets into why I had some parenthesis and question marks in some of my posts. My practical answer is that I've never seen the neutral brought out from the source transformer outside of the connection to the NGR. So the neutral isn't even available for phase to neutral connections.
So for MV, is the point of limiting the L-G fault current that (a) they are somehow worse than L-L faults (b) they are more likely than L-L faults or (c) you can't easily limit L-L fault current, but you can limit L-G fault current, or maybe all of the above and more?
L-G faults are much more common that L-L faults. It makes sense to clear them before they escalate.
To add numbers: you'll see varying statistics, but if you poke around you'll see it's usually stated that single line to ground faults are in the neighborhood of 70% of faults
That only makes sense, there are a lot more ways for a conductor to make contact with something grounded. Even working low voltage industrial, most times I have a fault it's phase to ground, I almost never see phase to phase faults.
