3 phase grid feed

[jancua]

Hello everyone,

does anyone know how to figure out how much kw you can feed in to each phase of a 3 phase mains connection to the grid? (workshop, south of UK)
Is there a law which says e.g. no more then 4 kw each phase or similar ones?
I think you must not overrate the existing size of wires from the mains (ask energy supplier for exact mains supply information?)...

I hope to gather some general information about 3 phase systems as we build only for domestic houses, until now!

thanks a lot for your help in advance.
regards
Jan

[Sunking]

Jan no laws other than the Law of Physics and that is governed by the size of the service transformer. 3-phase is used because of large load demands. A single phase 240/120 200 amp service is capable of delivering 48 Kw. Where a 3 phase 208/120 200 amp service can deliver 124 Kw.

Anyway none of that matters because a grid tied system is not designed based on what type of service you have. It is based on your average daily use, and how much of that you want to offset. So if you use 100 Kwh per day, and want to offset 100%, that is what you design for.

[jancua]

thanks a lot for your answer!

just for information it'll be a PV system at a carpenter workshop. The generated power will be fed to the grid and partly used at the workshop itself if there is demand (there is a 50/50 deal at the moment within the actual Feed-in Tariff regulations UK).

anyway, thanks