> Take a
close look at rural areas and there is only 1 High voltage line
> present.
> It is fed to the HT input of all the pole transformers.
Same thing is done in rural areas in Oz. They are called SWR lines, which
is TLA for Single Wire Run AFAIK.
Not sure of the voltage, but I think it's around 8kv. (240v to
subscribers)
They are somewhat unpopular, and are prone to surges
and sags etc.
Given the nature of the return path, (ground) and the way it would be
affected by weather etc, this is not surprising.
I would think it would have a lot more surges and sags than it does. I
guess they manage to keep the HT runs short enough however. I have several
1 to 3 KVA UPS's here and rarely (except during storms) do they kick in.
Boy does it get noisy then with all their alarm beepers going.:) Can't wait
to move them out once I make room (and get batteries for) the 10 KVA online
UPS I picked up.
The HT lines I am on are around 14.5KV. The typical distribution lines I
have found vary from12KV to 14.5 in the different areas I have lived.
Currently in North Carolina.
Dan