Ahh,
The Clothes-Line!. [Linked Image]
At one time parts of Mid and South Canterbury used to be riddled with these systems.
However, because of the increase of loads caused by the Dairy farms and irrigation plants flung all over the place, the Network down here has had to be upgraded to a full-sized 3 phase 33 or 66kV network, where there was originally only a single 11 or 22kV SWER line and a heap of step-down transformers along it's length.
As far as the SWER line itself went here, they were only of the single line variety.
You very rarely see them here these days, apart from the really isolated parts of the Network. [Linked Image]