Open Neutral
Senior Member
- Location
- Inside the Beltway
- Occupation
- Engineer
We had planned to get a 480 3ph feed from PG&E for a large residence.
At the meter, about 130 ft from the 22KV pole drop, we would add solar input, and go 800+ ft to the 112.5KVA house xfmr on pad we supply.
This has various i$$ues, most related to how much PG&E want$ to do this. It would need a pad mount xfmr [not all bad] and new pole for the 22KV riser.
It's possible we could save some money by taking their feed at 208/120, running it 130 ft, having the meter there, adding solar/etc; and then stepping it up to some common MV {say 4160}, going 800+ ft, and stepping down again.
a) Is this even practical at those 208V power levels over 130 ft?
b) We need both 480 and 208/120 at the house. We could have separate MV->480, MV->208/120 transformers, I guess, but do MV primary/dual secondary voltage units exist, outside of some custom build??
At the meter, about 130 ft from the 22KV pole drop, we would add solar input, and go 800+ ft to the 112.5KVA house xfmr on pad we supply.
This has various i$$ues, most related to how much PG&E want$ to do this. It would need a pad mount xfmr [not all bad] and new pole for the 22KV riser.
It's possible we could save some money by taking their feed at 208/120, running it 130 ft, having the meter there, adding solar/etc; and then stepping it up to some common MV {say 4160}, going 800+ ft, and stepping down again.
a) Is this even practical at those 208V power levels over 130 ft?
b) We need both 480 and 208/120 at the house. We could have separate MV->480, MV->208/120 transformers, I guess, but do MV primary/dual secondary voltage units exist, outside of some custom build??