See the SWER topic by RODALCO just a couple of threads down this same category Non US systems and Trades.

Primary voltage here is 11 kV. Return path through earth at HT side.

Secondary at service transformers 230 / 460 Volts.
or 230 - 0 - 230 Volts.

I will post a few more SWER piccies next month while in the Coromandel, New Zealand.

Cheers Ray.

The product of rotation, excitation and flux produces electricty.